CN114255555B - Fire escape guiding method, server and storage medium - Google Patents
Fire escape guiding method, server and storage medium Download PDFInfo
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- CN114255555B CN114255555B CN202011012853.9A CN202011012853A CN114255555B CN 114255555 B CN114255555 B CN 114255555B CN 202011012853 A CN202011012853 A CN 202011012853A CN 114255555 B CN114255555 B CN 114255555B
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
- G08B7/066—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources guiding along a path, e.g. evacuation path lighting strip
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
- G08B7/062—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources indicating emergency exits
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- Physics & Mathematics (AREA)
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- Business, Economics & Management (AREA)
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Abstract
A fire escape guiding method, the method comprising: receiving video information sent by a camera installed in a monitored environment; determining a fire location from the video information; generating at least one escape path according to the fire position, the exit position in the monitored environment and the LED light bar deployed in the monitored environment; receiving oxygen concentration information and length information of the LED light bar, which are sent by a sensing node on the LED light bar; determining an optimal escape path based on the at least one escape path and the oxygen concentration information; generating indication information for controlling the LED light bar based on the optimal escape path; and sending the indication information to the LED light bar. The application also provides a server and a storage medium, which can effectively guide a user to quickly escape from a fire scene in time.
Description
Technical Field
The invention relates to the field of safety, in particular to a fire escape guiding method, a server and a storage medium.
Background
When a user encounters a fire in a strange place and smoke in the fire scene is diffused, the user can get in the problem of not knowing how to escape. The optimal escape time for a typical fire situation is 90 seconds, in which time the user should escape? In reality, users think where people are when they are in fire, and the people escape to the place and follow the people. In fact, this sometimes makes itself more cumbersome.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a fire escape guiding method, a server and a storage medium, which can effectively guide people to evacuate to correct positions, and avoid the situation that people cannot find escape exits or emergency evacuation rooms due to losing sense of direction and reduced judgment.
In view of the above, it is necessary to provide a fire escape guiding method including: the method is applied to the server and comprises the following steps:
receiving video information sent by a camera installed in a monitored environment;
Determining a fire location from the video information;
Generating at least one escape path according to the fire position, the exit position in the monitored environment and the LED light bar deployed in the monitored environment;
Receiving oxygen concentration information and length information of the LED light bar, which are sent by a sensing node on the LED light bar;
determining an optimal escape path based on the at least one escape path and the oxygen concentration information;
Generating indication information for controlling the LED light bar based on the optimal escape path;
And sending the indication information to the LED light bar.
According to some embodiments of the application, the method of generating the at least one escape route comprises:
Establishing connection nodes based on the sensing nodes on the LED light bars, and setting a hierarchy corresponding to the connection nodes;
And generating escape paths according to all the established connection nodes and the corresponding layers.
According to some embodiments of the present application, the establishing a connection node based on the sensing node on the LED light bar, and setting a hierarchy corresponding to the connection node includes:
determining a plurality of sensing nodes based on the exit positions in the monitored environment, establishing a first connecting node based on the plurality of sensing nodes, and setting a hierarchy corresponding to the first connecting node as a first hierarchy;
Searching all adjacent nodes of the first connecting node;
Establishing a second connection node based on the searched adjacent node, and setting a hierarchy corresponding to the second connection node as a second hierarchy;
continuously searching all adjacent nodes of the second connection node, establishing a third connection node based on the searched adjacent nodes, and setting a level corresponding to the third connection node as a third level;
And until all adjacent nodes of the built ith connecting node are searched, building an ith+1 connecting node based on the searched adjacent nodes, and setting a level corresponding to the ith+1 connecting node as an ith+1 level, wherein i is a positive integer.
According to some embodiments of the present application, the generating escape paths according to all the established connection nodes and the corresponding hierarchy layer includes:
Taking the position of an outlet in the monitored environment as the end point of the escape path;
searching a connection node corresponding to the sensing node on the LED light bar according to the end point;
And generating the escape route according to the hierarchy corresponding to the connecting nodes and the preset sequence.
According to some embodiments of the application, if at least two escape paths share a connection node, the common connection node is added to the shortest escape path of the at least two escape paths.
According to some embodiments of the application, the method further comprises:
sending control information to all the connecting nodes, and controlling all the connecting nodes to sequentially rescan target connecting nodes within a preset range according to the hierarchical size, wherein the connecting nodes and the target connecting nodes are located in different escape paths;
responding to the connection node scanning to the target connection node, and adding the target connection node to an escape path where the connection node is located;
Calculating a first length of an escape path where the connection node is located, and calculating a second length of the escape path after the target connection node is added;
comparing the first length and the second length;
And if the second length is smaller than the first length, changing the direction of the target connection node, and regenerating an escape path added into the target connection node.
According to some embodiments of the application, the determining the optimal escape path comprises:
calculating the length of the at least one escape path;
calculating the reliability of the escape path based on the length, the oxygen concentration and the hierarchy corresponding to the connection node on the escape path;
and selecting the escape path with highest reliability as the optimal escape path.
According to some embodiments of the application, the reliability K1 of the escape route is calculated by the following formula:
Wherein, W 1、W2 and W 3 are weight values, D is the length of the escape path, L is the level corresponding to the connection node, and N is the oxygen concentration.
According to some embodiments of the application, the method further comprises:
If the escape path cannot be determined according to the fire position and the LED light bars deployed in the monitored environment, calculating the fireproof reliability of all rooms in the monitored environment;
Determining a target room with highest fireproof reliability;
And generating a safety path according to the fire position, the target room and the LED light bars deployed in the monitored environment.
According to some embodiments of the present application, the fire protection reliability K 2 for all rooms in the monitored environment is calculated by the following formula:
Wherein W i is a weight value, S is a flame-retardant level of a material of an internal compartment of a room, F is a flame-retardant level of a material of a floor of the room, D is a flame-retardant level of a material of a door panel of the room, C is a fire-retardant material, O is a window of the room, L 1 is a floor of a user in a monitored environment, L 2 is a floor of the fire position in the monitored environment, M is all floors of the monitored environment, D is a horizontal distance between the target room and the fire position, R 1 is a length of the target room, and R 2 is a width of the target room.
A second aspect of the present application provides a server comprising:
A processor; and
And the memory is used for storing a plurality of program modules, and the program modules are loaded by the processor and execute the fire escape guiding method.
The third aspect of the present application also provides a storage medium having stored thereon at least one computer instruction loaded by a processor and performing the fire escape guiding method as described above.
Compared with the prior art, the fire escape guiding method, the server and the storage medium provided by the invention can be used for generating a plurality of escape paths by the LED light bars deployed in the monitored environment and determining the optimal escape path according to the plurality of escape paths and the information of the received oxygen concentration; and generating indication information for controlling the LED light bar based on the optimal escape path, and sending the indication information to the LED light bar. To prompt the user to escape from the hazardous area in the monitored environment as soon as possible.
Drawings
Fig. 1 is an application environment diagram of a preferred embodiment of the fire escape guiding method of the present invention.
FIG. 2 is a block diagram of a preferred embodiment of a sensing node of the present invention.
Fig. 3 is a preferred embodiment of the fire escape guiding method of the present invention.
Fig. 4A to 4D are schematic views of LED light bars.
Fig. 5 is a flowchart of a fire escape guiding method according to a preferred embodiment of the present invention.
Fig. 6 is a schematic diagram of creating an escape path in a monitored environment.
Fig. 7 is a schematic view of a fire spreading to the escape route.
Fig. 8 is a schematic plan view of a monitored environment.
Fig. 9 is a schematic diagram of an escape route initially generated according to neighboring nodes in the monitored environment according to the fire escape guiding method of the present invention.
Fig. 10 is a schematic diagram of a fire escape guiding method according to the present invention, in which an escape path is continuously generated according to neighboring nodes in the monitored environment.
FIG. 11 is a schematic diagram of a fire escape route generated after a new node is obtained by scanning an escape route end node according to the fact that the new node cannot be found by an adjacent node in the monitored environment.
FIG. 12 is a schematic diagram of the sensing nodes around a surface sequentially scanned by all the sensing nodes on the escape path after the escape path is generated by the fire escape guiding method of the present invention.
Fig. 13 is a schematic diagram of a fire escape guiding method of the present invention, after generating an escape path, scanning a 8 and a 9 through a sensing node a 3 on the escape path.
Fig. 14 is a schematic diagram of the fire escape guiding method of the present invention, after generating an escape path, changing the escape directions of a 8 and a 9, and regenerating the escape path.
Fig. 15 is a block diagram of a preferred embodiment of the fire escape guiding device of the present invention.
Fig. 16 is a block diagram of a preferred embodiment of the server of the present invention.
Description of the main reference signs
Server 1
Mobile terminal 2
Communication module 20
Display screen 21
Sensor 3
Oxygen concentration sensor 30
Ultrasonic obstacle sensor 31
Infrared sensor 32
Bluetooth beacon 33
Camera 4
LED light bar 5
Sensing node 6
Memory 11
Processor 12
Communication bus 13
Computer program 14
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
Referring to fig. 1 to 3, in the present embodiment, the fire escape guiding method is applied to an environment constituted by a server 1, a mobile terminal 2, a sensor 3, and a camera 4. The server may be a cloud server, and the server is in communication connection with the mobile terminal 2, the sensor 3 and the camera 4.
In the present embodiment, the sensor 3 includes an oxygen concentration sensor 30, an ultrasonic obstacle sensor 31, and an infrared sensor 32. The oxygen concentration sensor 30 and the ultrasonic obstacle sensor 31 are disposed at both ends of each LED light bar 5, and the LED light bars 5 are disposed between the wall surface and the ground in the monitored environment. In this embodiment, the oxygen concentration sensor 30, the ultrasonic obstacle sensor 31, and the bluetooth Beacon 33 (e.g., beacon) form a sensing node 6, and the sensing node 6 is disposed at both ends of the LED light bar 5. An escape route may be generated based on the sensing node 6. The oxygen concentration sensor is used for detecting the oxygen concentration in the monitored environment; the ultrasonic obstacle sensor is used for detecting a sensing node in a preset range. In one embodiment, the ultrasonic obstacle sensor is an ultrasonic distance sensor. The bluetooth beacon is used to provide communication functions for the sensing node 6. The infrared sensor 32 is used to detect whether a person has escaped the monitored environment.
It should be noted that, in other embodiments, the communication function provided for the sensing node 6 may also be other communication units in the prior art, such as a wireless communication unit.
In one embodiment, the monitored environment is a plant, the plant comprising a plurality of rooms. The LED light strips may be disposed between the wall and floor of each room (as shown in fig. 2). The sensing nodes are arranged at two ends of the LED light bar. The infrared sensors are arranged on two sides of an outlet of the room and are used for detecting whether a person escapes from the room.
In this embodiment, the camera is installed in the monitored environment, and the camera is configured to capture video information of the monitored environment, and send the video information to the server. For example, as shown in fig. 3, the camera is installed at a top position corner of the room. In an embodiment, the camera may be a ball camera or a gun camera. In other embodiments, the camera may also be an infrared camera. The infrared camera detects infrared heat in a non-contact way and converts the infrared heat into a thermal image and/or a temperature value so as to detect whether fire conditions exist in the monitored environment. The infrared camera can accurately quantify the detected heat, and accurately identify and accurately analyze the dangerous area which is heated. The environmental parameter may include the thermal image.
In this embodiment, the LED light bar may indicate the user through different graphics. For example, when the LED light bar presents an arrow as shown in fig. 4A, the user is instructed to walk left; when the LED light bar presents an arrow as shown in FIG. 4B, the user is instructed to walk to the right; when the LED light bar presents an arrow shown in fig. 4C, the user is instructed to walk towards the opposite direction; the LED light bar, when presented with a forked icon as shown in fig. 4D, indicates that the user is not approaching. The LED light bar can also flash at different frequencies according to the oxygen concentration in the monitored environment detected by the oxygen concentration sensor. For example, if the oxygen concentration in the monitored environment is greater than or equal to the first preset concentration (e.g., 21%), it indicates that the oxygen concentration in the monitored environment is relatively high, and the user can be reminded that the oxygen in the monitored environment is relatively high by flashing at a low frequency (f=0.5 Hz). If the oxygen concentration in the monitored environment is smaller than the first preset concentration and larger than the second preset concentration (15%), the oxygen concentration in the current monitored environment is indicated to be general, and the user can be reminded of the general oxygen in the current monitored environment through the flickering of the medium frequency (f=1 Hz). If the oxygen concentration in the monitored environment is smaller than the second preset concentration and larger than or equal to the third preset concentration (11%), the fact that the oxygen concentration in the current monitored environment is insufficient is indicated, and the user can be reminded of the lack of oxygen in the current monitored environment through high-frequency (f=2 Hz) flickering. And if the oxygen concentration in the monitored environment is smaller than the third preset concentration, indicating that the oxygen concentration in the current monitored environment is rare, and reminding a user that the oxygen in the current monitored environment is rare through the flicker of the highest frequency (f=3 Hz).
In this embodiment, the mobile terminal 2 includes, but is not limited to, a communication module 20 and a display screen 21. The above elements are electrically connected. The mobile terminal 2 may be a mobile phone, a tablet computer, a wearable device or other portable electronic devices.
In this embodiment, the communication module 20 is configured to provide wired or wireless network communication for the mobile terminal 2. For example, the mobile terminal 2 is connected to the server 1 through the communication module 20 in a wireless network.
In this embodiment, the wired network may be any type of conventional wired communication, such as the internet, a local area network. The wireless network may be of any type of conventional wireless communication, such as radio, wireless fidelity (WIRELESS FIDELITY, WIFI), cellular, satellite, broadcast, etc.
In this embodiment, the display 21 may be a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) or an Organic Light-Emitting Diode (OLED) display. The display screen 21 is used for displaying information such as an electronic map. The display screen 21 may have a touch function.
In this embodiment, the location information of the mobile terminal 2 may be implemented by an indoor positioning technology. The indoor positioning technology comprises at least one of a radio frequency signal positioning technology, a sensor-based positioning technology, an ultra-bandwidth positioning technology and an LED visible light positioning technology. The mobile terminal 2 is connected to the server 1 through a communication module 20 in a wireless network, and the mobile terminal 2 may send the located position information to the server 1.
As shown in fig. 5, a flow chart of a fire escape guiding method according to a preferred embodiment of the present invention is shown. The order of the steps in the flowchart may be changed, and some steps may be omitted or combined according to various needs.
Step S1, receiving video information sent by a camera installed in the monitored environment.
In this embodiment, a camera is installed in the monitored environment, and the camera is in communication connection with the server. The camera can shoot the video information of the monitored environment in real time, bind the video information with the position information of the camera and then send the video information to the server.
And step S2, determining the fire disaster position according to the video information.
After receiving the video information, the server carries out image processing on the video information through an image processing technology and judges whether flame or smoke appears in the video information. And if the occurrence of flame or smoke in the video information is confirmed, determining that a fire disaster occurs in the monitored environment, and confirming the position of the fire disaster according to the position information of the camera bound with the video information. It should be noted that, the technology of performing image processing on the video information and determining whether flame or smoke appears in the video information is the prior art, and is not described herein.
Step S3, determining whether the fire disaster position is a plurality of fire disaster positions. If the fire disaster position is one, the flow enters a step S4; if there are a plurality of fire locations, the flow proceeds to step S5.
And S4, generating at least one escape path according to the fire position and the LED light bars deployed in the monitored environment.
In this embodiment, the method for generating the at least one escape route includes: establishing all connection nodes based on the sensing nodes on the LED light bar, and setting a hierarchy corresponding to the connection nodes; and generating at least one escape path according to all the established connection nodes and the corresponding layers. Specifically, the generating escape paths according to all the established connection nodes and the corresponding hierarchy includes: taking the outlet position as the end point of the escape path; searching a connection node corresponding to the sensing node on the LED light bar according to the end point; and generating the escape route according to the corresponding hierarchy of the connecting nodes and the preset sequence (from small to large).
It should be noted that, if at least two escape paths share a connection node, the common connection node is added to the shortest escape path of the at least two escape paths.
In this embodiment, the fire escape guiding method further includes:
Sending control information control to all the connecting nodes, and controlling all the connecting nodes to sequentially rescan target connecting nodes within a preset range according to the level size, wherein the connecting nodes and the target connecting nodes are located in different escape paths;
responding to the connection node scanning to the target connection node, and adding the target connection node to an escape path where the connection node is located;
calculating a first length of an escape path where the connection node is located and a second length of the escape path after the target connection node is added;
comparing the first length and the second length;
and if the second length is smaller than the first length, changing the direction of the target connection node, and regenerating an escape path where the connection node is located.
If the second length is greater than or equal to the first length, the direction of the target connection node is not changed, and the escape path of the connection node is reserved.
In another embodiment, the method of generating the at least one escape path comprises: taking the outlet position as the end point of the escape path; scanning connection nodes in a preset range (such as 5 meters) by taking the end point as a center; generating a first escape path based on the terminal point and the connection node; generating a second escape path by using the LED light bars corresponding to the connection nodes; determining another connection node on the LED light bar, generating a third escape path by using the LED light bar adjacent to the another connection node, and the like until all connection nodes are found out, so as to obtain an N-th escape path; the escape route is generated based on the first escape route, the second escape route and the N-th escape route of the third escape route ….
In one embodiment, since the connection nodes within the preset range may include a plurality of connection nodes, the end point may be used as a center, a plurality of escape routes may be generated. If at least two escape paths share a connecting node when the plurality of escape paths are generated, adding the shared connecting node to the shortest escape path in the at least two escape paths.
In this embodiment, the method for establishing all connection nodes based on the sensing nodes on the LED light bar includes:
Determining a plurality of sensing nodes based on the exit positions in the monitored environment, and setting a hierarchy corresponding to the plurality of sensing nodes as a first hierarchy;
If adjacent wall connecting nodes exist in the plurality of sensing nodes, a first connecting node is established based on the adjacent wall connecting nodes, and a layer corresponding to the first connecting node is set to be a second layer;
Searching all adjacent nodes of the first connecting node;
Establishing a second connection node based on the searched adjacent node, and setting a level corresponding to the second connection node as a third level;
continuously searching all adjacent nodes of the second connection node, establishing a third connection node based on the searched adjacent nodes, and setting a level corresponding to the third connection node as a third level;
And until all adjacent nodes of the built ith connecting node are searched, building an ith+1 connecting node based on the searched adjacent nodes, and setting a level corresponding to the ith+1 connecting node as an ith+1 level, wherein i is a positive integer.
In this embodiment, the adjacent wall-connected nodes describe sensing nodes on LED light bars on the same wall; the adjacent nodes describe sensing nodes at two ends of the same LED light bar, sensing nodes at the same position on different LED light bars and sensing nodes at two sides of an outlet.
Each LEB light bar will transmit its length to the server by itself through a sensing node that can measure the distance and angle at which surrounding sensing nodes are located. A preset starting time is set by the server, and searching for the sensing node is synchronously started from all outlet positions (different D points) in the monitored environment. And adding the found sensing nodes from different directions by taking the outlet position as an initial position to form a plurality of node strings in sequence. Searching for a new sensing node from the last node of each node string, and adding the found new sensing node to the node string. Each Time a new node is found, the Time period (Time clock) taken is 1 second whole, ensuring that each node level depth in each node string is the same. When the sensor is used for scanning, if a plurality of new nodes are found, the sensor selects to add the new node with the shortest distance.
For example, as shown in fig. 6, with point D as the exit location, a connection node is established based on the sensing node on the LED light bar in the monitored environment, and setting a hierarchy corresponding to the connection node, including: determining that two adjacent wall-connected nodes are first connecting nodes A 1 and E 1 and two non-adjacent wall-connected nodes are first connecting nodes B 1 and C 1 based on the point D, Setting the corresponding levels of the first connection nodes A 1 and E 1 and the first connection nodes B 1 and C 1 as first levels; Second connection nodes a 2 and E 2 are established based on the adjacent wall connection nodes a 1 and E 1, And sets the corresponding hierarchy of the second connection nodes a 2 and E 2 as a second hierarchy. A second connecting node B 2 and C 2 is established based on the non-adjacent wall connecting node bs 1 and C 1, setting the corresponding level of the second connecting node B 2 and the corresponding level of the second connecting node C 2 as a second level; Searching all neighboring nodes of the second connecting node B 2 and C 2, establishing a third connecting node B 3 and C 3' based on the searched neighboring nodes, And sets the corresponding level of the third connecting node B 3 and C 3' as the third level.
After the connection nodes are established according to all the adjacent nodes, all the connection nodes sequentially reuse the sensor to scan the sensing nodes within a preset range according to the hierarchical size. The third connecting node B 3 scans the sensing nodes (i.e., the third connecting node C 3') within a preset range, and establishes a fourth connecting node B 4 based on the scanned sensing nodes; The second connection node C 2 scans the sensing node C 3 within a preset range, and calculates a first distance between the second connection node C 2 and the scanned sensing node C 3; Determining a second distance between the second connection node C 2 and a neighboring node C 3' of the second connection node C 2; comparing the first distance to the second distance; the first distance is smaller than the second distance, and a third connection node C 3 is established according to the scanned sensing node C 3. Setting a hierarchy corresponding to the third connection node C 3 as a third hierarchy; searching all adjacent nodes of the third connection node C 3, establishing a fourth connection node C 4 based on the searched adjacent nodes, and setting a hierarchy corresponding to the fourth connection node C 4 as a fourth hierarchy; Searching all adjacent nodes of the fourth connection node C 4, establishing a fifth connection node C 5 based on the searched adjacent nodes, and setting a hierarchy corresponding to the fifth connection node C 5 as a fifth hierarchy; searching all adjacent nodes of the fifth connection node C 5, establishing a sixth connection node C 6 based on the searched adjacent nodes, and setting a hierarchy corresponding to the sixth connection node C 6 as a sixth hierarchy. Generating four escape paths according to the first to sixth connection nodes and the corresponding hierarchy levels:
D←A1←A2；
D←B1←B2←B3←B4；
D←C1←C2←C3←C4←C5←C6；
D←E1←E2；
Wherein the arrow indicates the escape direction.
In one embodiment, if the server analyzes according to the video information captured by the camera to obtain that the fire propagates to the preset LED light bar, the control information is sent to the preset LED light bar, and the preset LED light bar is controlled to display the "no-traffic state". The server can change the escape path containing the preset LED light bar. For example, if the preset LED light bar has the sensing node of the adjacent other escape route, the escape direction of the escape route is changed to the opposite direction, so as to guide the person to the end point of the adjacent other escape route, so that the person can escape along the other escape route. As shown in fig. 7, the direction of a 2 to a 1 is changed from a 1 to a 2. And if the LED light bars have no connecting nodes of other adjacent escape paths, controlling all the LED light bars behind the failed LED light bars to display an 'forbidden traffic state'.
And S5, determining the position with the largest fire intensity among the fire positions as a fire escape path starting point, determining at least one escape path based on the starting point and the LED light bars deployed in the monitored environment, and then, entering a step S6.
In this embodiment, a position with a maximum fire is analyzed according to an image processing technology, the position with the maximum fire is taken as a starting point of a fire escape path, and at least one escape path is determined based on the starting point and an LED light bar deployed in a monitored environment.
And S6, receiving oxygen concentration information and length information of the LED light bar, which are sent by the sensing node on the LED light bar.
And S7, determining an optimal escape path based on the at least one escape path and the oxygen concentration information.
In this embodiment, after at least one escape route is generated, the length of the escape route and the oxygen concentration of the environment in which the escape route is located need to be considered to select an optimal escape route for the user. The oxygen concentration of the environment of the escape path can be measured according to the sensing node on the escape path.
Specifically, the method for determining the optimal escape path comprises the following steps: calculating the length of the at least one escape path; calculating the reliability of the escape path based on the length, the oxygen concentration and the hierarchy corresponding to the connection node on the escape path; and selecting the escape path with highest reliability as the optimal escape path.
The reliability K 1 of the escape route is calculated by the following formula:
Wherein, W 1、W2 and W 3 are weight values, D is the length of the escape path, L is the level corresponding to the connection node, and N is the oxygen concentration.
S8, generating indication information for controlling the LED light bar based on the optimal escape path;
In this embodiment, the indication information includes an escape direction and an oxygen concentration reminder. For example, escape direction is indicated by an arrow, and oxygen concentration is indicated by a blinking frequency.
And step S9, sending the indication information to the LED light bar.
In this embodiment, the LED light bar controls the direction of the arrow and the flicker frequency of the display according to the indication information.
In one embodiment, the method further comprises: and sending the optimal escape route to the mobile terminal in a preset information format. After the mobile terminal receives the at least one escape path, the mobile terminal also receives LED length information and oxygen concentration information sent by a sensing node of the LED light bar, and determines an optimal escape path based on the at least one escape path and the oxygen concentration information. The method for determining the optimal escape path is consistent with the method for determining the optimal escape path by the server, and will not be described herein.
In this embodiment, the preset information format is { node name, angle direction, distance between nodes }. For example, escape route d≡a 1←A2 corresponds to information format { D, +90 °, [2.2], a 1,0°,[2.8],A2 };
The information format corresponding to escape route D≡B 1←B2←B3←B4 is { D, -65 °, [0.6], B 1,0°,[0.9],B2,-90°,[1.4],B3,-90°,[0.3],B4 };
The information format corresponding to the escape route D≡C 1←C2←C3←C4←C5←C6 is {D,-75°,[0.8],C1,+90°,[1.2],C2,+45°,[2.8],C3,-90°,[0.3],C4,-90°,[0.3],C5,-90°,0.3],C6};
The escape route D≡E 1←E2 corresponds to the information format { D, -90 °, [2.3], E 1,0°,[2.8],E2 }.
In one embodiment, the server 1 may send the escape route to the mobile terminal 2 with the shortest total length of the at least one escape route. After the mobile terminal 2 obtains the current position information through the indoor positioning technology, the position information is displayed in an electronic map of the monitored environment. And then displaying the guiding directions of the sensing nodes at two sides of the LED light bar in a display screen according to the escape path. So as to be convenient for checking the whole escape path and the escape direction in real time.
If the current position of the mobile terminal 2 is located at the intersection of the last node of the node string formed by more than two escape routes, the reliability of the escape route is calculated through the oxygen concentration, the path length node level and the weight, and the escape route with higher reliability is selected for direction guiding. The method for calculating the reliability of the escape route is as described above, and will not be described in detail here.
In another embodiment, if a reliable escape path cannot be determined according to the fire location and the LED light bars deployed in the monitored environment, the fire protection reliability of all rooms in the monitored environment may be calculated first; determining a target room with highest fireproof reliability; and generating a safety path according to the fire position, the target room and the LED light bars deployed in the monitored environment. And generating indication information for controlling the LED light bar based on the safety path, and sending the indication information to the LED light bar to help a user to smoothly arrive at the target room and wait for rescue of a life saving person.
In this embodiment, the fire protection reliability K 2 for all rooms in the monitored environment is calculated by the following formula:
Wherein W i is a weight value, S is a flame-retardant level of a material of an internal compartment of a room, F is a flame-retardant level of a material of a floor of the room, D is a flame-retardant level of a material of a door panel of the room, C is a fire-retardant material of a curtain of the room, out (O) is a window of the room, L 1 is a floor of a user in a monitored environment, L 2 is a floor of a fire position in the monitored environment, M is all floors of the monitored environment, D is a horizontal distance between the target room and the fire position, R 1 is a length of the target room, and R 2 is a width of the target room.
In one embodiment, when the fire resistance level of the material of the compartment in the room is one level, s=0.9; when the flame-retardant level of the material of the compartment in the room is two-level, s=0.3; when the fire resistance level of the material of the inner compartment of the room is three-level, s=0.1. When the flame-retardant level of the room floor material is consistent with that of the internal compartment material, the corresponding F value is the same as that of the S value; when the flame-retardant level of the room door plate material is consistent with that of the internal compartment material, the corresponding D value is the same as that of the S value; when the curtain is made of fireproof materials, c=0.9; when the curtain is made of non-fireproof materials, c=0.9; o when the room has an external window, out (O) =0.9; out (O) =0 when the room has no external window.
The flame resistance level is described as one level: the combustion phenomenon is not easy to occur in the initial stage of fire, and the smoke coefficient of unit area is lower than 30. The flame resistance level is described in the second order: only a very small combustion phenomenon occurs at the initial stage of a fire, and the smoke generation coefficient per unit area is lower than 60. Flame resistance levels are described in three stages: only micro-combustion occurs at the initial stage of fire, and the smoke coefficient per unit area is lower than 120. The calculation formula of the smoke generation coefficient is as follows:
CA＝240log10(I0/I)
Wherein I 0 is the light intensity at the beginning of the heating experiment (Lux), and I is the minimum value of the light intensity in the heating experiment.
The materials with the first flame resistance level comprise concrete, bricks or hollow bricks, tiles, stones, steel, aluminum, glass fibers, mineral wool, ceramics, mortar, lime and the like; the second-level flame-retardant materials comprise wood wool cement boards, flame-retardant gypsum boards and the like; the materials with three flame-retardant grades comprise a flame-retardant plywood, a flame-retardant fiber board, a flame-retardant plastic board, a gypsum board and the like.
In order to facilitate understanding of the above-described fire escape guiding method, the following specific examples will be described. Fig. 8 is a schematic plan view of the monitored environment. The monitored environment map includes a plurality of rooms, e.g., an overwrap room, an inner overwrap room, an office, etc. An LED light strip is attached between the wall and the floor of each room, and sensing nodes are arranged at both ends of each LED light strip. As can be seen from fig. 8, the monitored environment includes two outlets D1 and D2. The connection node established according to the sensing node is An (represented by solid dots in the figure). As shown in fig. 9, four escape routes are generated from the connection nodes. First escape path: d 1←A1←A2; a second escape path: d 1←B1←B2; third escape route: d 2←X1←X2; fourth escape route: d 2←Y1←Y2, the arrow in the figure indicates the escape direction.
The search continues for neighboring nodes connecting nodes a 2、B2、X2 and Y 2. Find the adjacent node of the connection node a 2. Thus, the first escape path may continue to be updated to D 1←A1vA2←A3←A4←A5vA6. And finding the adjacent node of the connection node Y 2. Thus, the fourth escape path may continue to be updated to D 1vY1←Y2←Y3←Y4vY5. Since the connecting nodes B 2 and X 2 are located at the doorway of the room, there are no neighboring nodes. Accordingly, the connection node is searched within a preset range of the connection node B 2 and X 2. The connecting node B 2 is found to be the connecting node B 3 within the preset range, and the second escape path is updated to D 1←B1←B2←B3. As shown in fig. 10, the first escape path may be continuously updated as: d 1←A1←A2←A3←A4←A5←A6.
As shown in fig. 11, the neighboring node X 3 of the connection node X 2 can be found as well; find neighbor a 7 to connect node a 6, and find neighbor Y 6 to connect node Y 5. The first escape path may continue to be updated as: d 1←A1←A2←A3←A4←A5←A6←A7; the third escape path may be updated as: d 2←X1←X2←X3; and the fourth escape path may be updated as: d 2←Y1←Y2←Y3←Y4←Y5←Y6.
By analogy, as shown in fig. 12, the four escape paths may be updated according to all the connection nodes in the monitored environment, as follows:
the first escape path is ：D1←A1←A2←A3←A4←A5←A6←A7←…←A14;
The second escape path is as follows: d 1←B1←B2←B3←…←B12;
The third escape path is as follows: d 2←X1←X2←X3←…←X8;
The fourth escape path is ：D2←Y1←Y2←Y3←Y4←Y5←Y6←Y7←…←Y16.
The server sends control information control to all the connection nodes, and controls all the connection nodes to sequentially rescan target connection nodes in a preset range according to the hierarchical size (B 8 and B 9 shown in FIG. 13); and adding the target connection nodes B 8 and B 9 into the first escape path, and obtaining six escape paths after calculation processing (as shown in fig. 14). The following is shown:
the first escape path is ：D1←A1←A2←A3←A4←A5←A6←A7←…←A14;
Updating the second escape path as follows: d 1←B1←B2←B3←…←B7;
updating the third escape path as follows: d 1←A1←A2←A3←B8←B7;
updating the fourth escape path as follows: d 1←A1←A2←A3←B9←B10←B11←B12;
The newly added fifth escape route is as follows: d 2←X1←X2←X3←…←X8;
the new sixth escape path is ：D2←Y1←Y2←Y3←Y4←Y5←Y6←Y7←…←Y16.
Fig. 5 is a detailed description of a fire escape guiding method according to the present application, by which the fire escape speed can be improved. The functional modules and hardware device architecture for implementing the fire escape guiding device are described below with reference to fig. 15 and 16. It should be understood that the embodiments described are for illustrative purposes only and are not limited to this configuration in the scope of the patent application.
Fig. 15 is a functional block diagram of a fire escape guiding device according to an embodiment of the present application.
In some embodiments, the fire escape guiding device 100 may include a plurality of functional modules composed of program code segments. Program code for each program segment in the fire escape guiding device 100 may be stored in a memory of the server 1 and executed by at least one processor in the server 1 to implement a fire escape guiding function.
Referring to fig. 15, in the present embodiment, the fire escape guiding apparatus 100 may be divided into a plurality of functional modules according to functions performed thereby, each of which is used to perform each step of the corresponding embodiment of fig. 5, so as to implement the fire escape guiding function. In this embodiment, the functional modules of the fire escape guiding device 100 include: a receiving module 101, a determining module 102, a generating module 103, and a transmitting module 104.
The receiving module 101 is used for receiving video information sent by a camera installed in the monitored environment; the determining module 102 is configured to determine a fire location according to the video information; the generating module 103 is configured to generate at least one escape path according to the fire location, the exit location in the monitored environment, and the LED light strip deployed in the monitored environment; the receiving module 101 is further configured to receive oxygen concentration information and length information of the LED light bar sent by the sensing node on the LED light bar; the determining module 102 is further configured to determine an optimal escape path based on the at least one escape path and the oxygen concentration information; the generating module 103 is further configured to generate indication information for controlling the LED light bar based on the optimal escape path; the sending module 104 is configured to send the indication information to the LED light bar.
Fig. 16 is a schematic diagram of a vehicle architecture according to an embodiment of the application. The server 1 comprises a memory 11, a processor 12 and a communication bus 13, wherein the memory 11 is in communication connection with the processor 12 through the communication bus 13.
The server 1 further comprises a computer program 14, such as a program for fire escape guidance, stored in the memory 11 and executable on the processor 12.
The steps of the fire escape guidance method of the method embodiment are implemented by the processor 12 when executing the computer program 14. Or the processor 12 executes the computer program 14 to perform the functions of the various modules/units in the system embodiment.
Illustratively, the computer program 14 may be partitioned into one or more modules/units that are stored in the memory 11 and executed by the processor 12 to complete the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing a specific function for describing the execution of the computer program 14 in the server 1. For example, the computer program 14 may be partitioned into modules 101-104 of FIG. 14.
It will be appreciated by those skilled in the art that the schematic diagram 15 is merely an example of the server 1 and does not constitute a limitation of the server 1, the server 1 may comprise more or less components than illustrated, or may combine certain components, or different components, e.g. the server 1 may further comprise input devices, network communication units, etc.
The Processor 12 may be a central processing unit (Central Processing Unit, CPU), and may include other general purpose processors, digital signal processors (DIGITAL SIGNAL processors, DSPs), application SPECIFIC INTEGRATED Circuits (ASICs), off-the-shelf Programmable gate arrays (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the processor 12 is a control center of the server 1, and connects the various parts of the entire server 1 using various interfaces and lines.
The memory 11 may be used to store the computer program 14 and/or modules/units, and the processor 12 may implement the various functions of the server 1 by running or executing the computer program and/or modules/units stored in the memory 11, and invoking data stored in the memory 11. The memory 11 may include an external storage medium or a memory. In addition, memory 11 may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart memory card (SMART MEDIA CARD, SMC), secure Digital (SD) card, flash memory card (FLASH CARD), at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. In the present embodiment, the memory 12 stores an electronic map. The electronic map includes map information of the monitored environment and arranged LED light bar information. For example, the electronic map includes information of a corridor, an exit, and the like of an office building.
The modules/units integrated in the server 1 may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the present application may also be implemented by implementing all or part of the flow of the method of the embodiment, or by instructing the relevant hardware by a computer program, where the computer program may be stored on a computer readable storage medium, and where the computer program, when executed by a processor, may implement the steps of the method embodiments. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention.
Claims (6)
1. A fire escape guiding method applied to a server, which is characterized by comprising the following steps:
receiving video information sent by a camera installed in a monitored environment;
Determining a fire location from the video information;
generating at least one escape path according to the fire location, the exit location in the monitored environment and the LED light bars deployed in the monitored environment, comprising:
establishing a connection node based on the sensing node on the LED light bar, and setting a hierarchy corresponding to the connection node, wherein the method comprises the following steps: the step of establishing connection nodes based on the sensing nodes on the LED light bar and setting the corresponding layers of the connection nodes comprises the following steps: determining a plurality of sensing nodes based on the exit positions in the monitored environment, establishing a first connecting node based on the plurality of sensing nodes, and setting a hierarchy corresponding to the first connecting node as a first hierarchy; searching all adjacent nodes of the first connecting node; establishing a second connection node based on the searched adjacent node, and setting a hierarchy corresponding to the second connection node as a second hierarchy; continuously searching all adjacent nodes of the second connection node, establishing a third connection node based on the searched adjacent nodes, and setting a level corresponding to the third connection node as a third level; until all adjacent nodes of the built ith connecting node are searched, building an ith+1 connecting node based on the searched adjacent nodes, and setting a level corresponding to the ith+1 connecting node as an ith+1 level, wherein i is a positive integer; generating escape paths according to all the established connection nodes and the corresponding layers, wherein the escape paths comprise: taking the position with the largest fire in a plurality of fire positions as the starting point of the escape path, and taking the position of an outlet in the monitored environment as the ending point of the escape path; searching a connection node corresponding to the sensing node on the LED light bar according to the end point; generating the escape route according to the hierarchy corresponding to the connecting nodes and a preset sequence; sending control information to all the connecting nodes, and controlling all the connecting nodes to sequentially rescan target connecting nodes within a preset range according to the hierarchical size, wherein the connecting nodes and the target connecting nodes are located in different escape paths; responding to the connection node scanning to the target connection node, and adding the target connection node to an escape path where the connection node is located; calculating a first length of an escape path where the connection node is located, and calculating a second length of the escape path after the target connection node is added; comparing the first length and the second length; if the second length is smaller than the first length, changing the direction of the target connection node, and regenerating an escape path added into the target connection node;
Receiving oxygen concentration information and length information of the LED light bar, which are sent by a sensing node on the LED light bar;
determining an optimal escape path based on the at least one escape path and the oxygen concentration information; generating indication information for controlling the LED light bar based on the optimal escape path;
And sending the indication information to the LED light bar.
2. The fire escape guiding method according to claim 1, wherein if at least two escape paths share a connection node, the common connection node is added to a shortest escape path among the at least two escape paths.
3. The fire escape guidance method of claim 1, wherein the determining the optimal escape path comprises:
calculating the length of the at least one escape path;
calculating the reliability of the escape path based on the length, the oxygen concentration and the hierarchy corresponding to the connection node on the escape path;
and selecting the escape path with highest reliability as the optimal escape path.
4. A fire escape guiding method as claimed in any one of claims 1 to 3, wherein the method further comprises:
If the escape path cannot be determined according to the fire position and the LED light bars deployed in the monitored environment, calculating the fireproof reliability of all rooms in the monitored environment;
Determining a target room with highest fireproof reliability;
And generating a safety path according to the fire position, the target room and the LED light bars deployed in the monitored environment.
5. A server is characterized in that, the server includes:
A processor; and
A memory in which a plurality of program modules are stored, the plurality of program modules being loaded by the processor and executing the fire escape guidance method according to any one of claims 1 to 4.
6. A storage medium having stored thereon at least one computer instruction, wherein the instruction is loaded by a processor and executed by a fire escape guidance method as claimed in any one of claims 1 to 4.
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