CN114988305B - A method for preventing electric shock during crane operation - Google Patents
A method for preventing electric shock during crane operation Download PDFInfo
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- CN114988305B CN114988305B CN202210706163.6A CN202210706163A CN114988305B CN 114988305 B CN114988305 B CN 114988305B CN 202210706163 A CN202210706163 A CN 202210706163A CN 114988305 B CN114988305 B CN 114988305B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
- B66C23/90—Devices for indicating or limiting lifting moment
- B66C23/905—Devices for indicating or limiting lifting moment electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
- B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses an early warning system for preventing an electric shock during operation of a suspension arm vehicle, which comprises the following components: the system comprises a high-voltage near-electricity intelligent early warning device, a two-dimensional laser radar and an electric shock prevention early warning monitoring system; the high-voltage near-electricity intelligent early warning device is an intelligent early warning device in a non-contact state when the operation vehicle is operated beyond the specified safety range of high-voltage power equipment, and provides near-electricity induction data for an electric shock prevention early warning monitoring system; the two-dimensional laser radar is used for detecting the distance condition of nearby objects, wherein the electric shock prevention early warning monitoring system is used for receiving data of the high-voltage near-electricity intelligent early warning device and the two-dimensional laser radar, and gives out corresponding warning states after comprehensive analysis according to relevant settings. When the crane is in an operation state, the invention can monitor near-electricity induction information and distance information between the crane and surrounding objects, monitor working environment in a multi-dimensional manner, monitor working environment of the crane arm vehicle in a multi-latitude manner and prompt a driver in time, thereby reducing electric shock accidents and inspection times of a power transmission line.
Description
Technical Field
The invention relates to crane operation safety early warning under a high-voltage transmission line, in particular to an early warning system for acquiring relevant data of a two-dimensional laser radar and a high-voltage near-electricity intelligent early warning device, carrying out data analysis, comprehensively analyzing, giving out graded warning reminding and relevant information and carrying out warning record.
Background
When the power system is constructed, the hoisting operation is inevitably performed under the high-voltage transmission line. When the crane is lifted, a driver can hardly judge the distance between the crane arm and the cable according to naked eye visual inspection, and the crane arm operation is not stopped in time due to the short distance, so that personal safety and large-scale power failure accidents are caused. Along with the continuous expansion of a power system, a power supply department strengthens the protection of a power line by increasing the inspection frequency, and an alarm system for judging the distance between a crane arm and a power transmission line according to an electric field induction principle and a wireless communication technology is existing at present, so that the system avoids potential hazard sources existing in a visual inspection mode to a certain extent. However, the electric field induction principle is easily affected by external factors such as weather, and the single information source cannot guarantee the reliability of the information, and the inspection frequency of line management personnel cannot be completely replaced or reduced from the source.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an early warning method for preventing the operation of a suspension arm vehicle from electric shock, so that the alarm and the monitoring of the crane operation can be integrated, the electric shock accidents and the inspection times of a power transmission line are reduced, and the safety of the production operation can be ensured.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the invention relates to an early warning system for preventing an electric shock during operation of a suspension arm vehicle, which is characterized by comprising the following components: the system comprises a high-voltage near-electricity intelligent early warning device, a two-dimensional laser radar and an electric shock prevention early warning monitoring system;
the high-voltage near-electricity intelligent early warning device comprises: a transmitting end and a receiving end;
The transmitting end is arranged on a hopper of the crane arm and comprises: the device comprises a sensor, a filter circuit, a sampling quantization circuit, a digital processing circuit and a wireless transmitting module, wherein the filter circuit, the sampling quantization circuit, the digital processing circuit and the wireless transmitting module are electrically connected with the sensor in sequence;
the receiving end is arranged on the crane arm and comprises: the wireless receiving module, the MPU unit and the alarm are electrically connected in sequence;
The sensor acquires an induced voltage signal of a high-voltage circuit under the overhead line, processes the induced voltage signal sequentially through the filter circuit, the sampling quantization circuit and the digital processing circuit, and obtains a preprocessed induced voltage signal which is sent to the receiving end through the wireless transmitting module;
The wireless receiving module in the receiving end receives the preprocessed induced voltage signal and transmits the preprocessed induced voltage signal to the MPU unit, so that the MPU unit compares the preprocessed induced voltage signal according to a set voltage early warning threshold value, if the voltage early warning threshold value exceeds the preset voltage early warning threshold value, the wireless receiving module controls the alarm module to carry out alarm prompt, and an early warning signal W is sent to the electric shock prevention early warning monitoring system;
The two-dimensional laser radar is arranged on the car hopper and comprises a radar transmitting unit, a radar receiving unit, a control unit, a light splitting element, a scanning mirror and an optical element; wherein the scan mirror comprises: a first scanning mirror and a second scanning mirror disposed in a conjugate relationship; the sub-element comprises a first, a second and a third optical element;
the radar transmitting unit transmits laser signals to surrounding scanning areas by using a laser, irradiates the same position of the first scanning mirror from different angles, and transmits the laser signals from different angles through the first optical element and the second optical element to be collimated and converged on the second scanning mirror, so that the scanning direction of the laser signals is modulated; reflecting all the incident laser signals to the scanning area by the second scanning mirror, and reflecting echo signals of targets on the scanning area to a third optical element by the light splitting element, so that the echo signals are converged on a detector in the radar receiving unit by the third optical element; the detector sends the received echo signals to the control unit, so that the control unit processes the echo signals to obtain two-dimensional radar data data_r, and the two-dimensional radar data data_r are sent to the electric shock prevention early warning monitoring system through the network module;
The electric shock prevention early warning monitoring system comprises: initializing a functional module, a normal operation functional module and an intermittent functional module;
The initialization function module reads key configuration data from a configuration file in an initial state, and comprises the following steps: m alarm level thresholds { L m}M m=1, a radar set detection distance d 1, a start angle a 1 and an end angle a 2 of radar detection angles, wherein L m represents an mth alarm level threshold;
The normal operation function module defines and initializes N alarm states { H n}N n=1, wherein H n represents an nth alarm state; n represents the type of alarm state;
The normal operation function module receives the two-dimensional radar data data_r and the early warning signal W under the current period t 1, and when the two-dimensional radar data data_r and the early warning signal W are received successfully, the corresponding overtime identification bits in the overtime identification bits { lag j}J j=1 are set to be true; wherein lag j represents the jth timeout flag; and performing Data correction on the two-dimensional radar Data data_r by using the formula (1) to obtain corrected two-dimensional radar Data data_r:
Data_r = data_r × Magnification + offset (1)
in the formula (1), magnification denotes a set data transmission multiple, and offset denotes a set data offset;
The normal operation function module respectively compares the corrected Data data_r with M alarm level thresholds in the current period t 1
{ L m}M m=1, resulting in a radar warning state W r at the current period t 1:
Let W r =0 if data_r > L 1 ;
w r =1 if data_r < L 1 and data_r > L 2;
W r =2 if data_r < L 2 and data_r > L m-1;
W r =m-1 if data_r < L m-1 and data_r > L m;
Let W r = LM if Data_r < L M;
The normal operation function module compares the levels of N current alarm states { W n}N n=1) under the current period t 1 to obtain and output the highest alarm level L max under the current period;
the normal operation function module compares N current alarm states { W n}N n=1 and { H n}N n=1 one by one under the current period t 1, and if W n is greater than 0 and W n≠hn, the N current alarm states { W n}N n=1 under the current period t 1 are stored in a database; otherwise, not storing the data in the database;
The normal operation function module sequentially assigns N current alarm states { W n}N n=1 to { H n}N n=1 under a current period t 1; the intermittent function module judges the overtime state { WT j}J j=1 according to the overtime judging flag bit { lag j}J j=1 under the current period t 2, if the jth flag bit lag j is true, the jth overtime state WT j =0, otherwise, the jth overtime state WT j =1; finally, the intermittent function module sets the timeout flag bit { lag j J j=1 to false.
Compared with the prior art, the invention has the beneficial effects that:
The invention designs and develops a crane operation monitoring system based on the purpose of reducing power failure loss, and the system consists of 3 parts of a high-voltage near-electricity intelligent early warning device, a two-dimensional laser radar and an electric shock prevention early warning monitoring system (an upper computer system) which are arranged on a crane arm. When the crane is in an operation state, the distance between the crane arm and the power transmission line can be monitored by the two-dimensional laser radar, the voltage information can be monitored in real time by the near-electricity detection device, the reliability of monitoring data sources is greatly improved by multi-dimensional monitoring, the multi-dimensional monitoring data is sent to the industrial control upper computer, the upper computer system carries out data analysis and comprehensive analysis, graded alarm reminding and related information are given according to graded setting, and alarm records are made for reminding a driver, so that crane operation alarming and monitoring can be integrated, and electric shock accidents and power transmission line inspection times are further reduced.
Drawings
FIG. 1 is a block diagram of an early warning system for preventing electric shock during operation of a boom car according to the invention;
FIG. 2 is a block diagram of the near-electricity intelligent early warning device of the invention;
FIG. 3 is a schematic diagram of a two-dimensional radar detection range as described in an example of the present invention;
fig. 4 is a functional diagram of a core of the electric shock prevention early warning and monitoring system according to the invention.
Detailed Description
In this embodiment, as shown in fig. 1, an early warning system for preventing an electric shock during operation of a boom vehicle includes: the system comprises a high-voltage near-electricity intelligent early warning device, a two-dimensional laser radar and an electric shock prevention early warning monitoring system;
The high-voltage near-electricity intelligent early warning device comprises: a transmitting end and a receiving end;
the transmitting end is arranged on a hopper of the crane arm and comprises: the sensor, the filter circuit, the sampling quantization circuit, the digital processing circuit and the wireless transmitting module are electrically connected with the sensor in sequence;
The receiving end is provided on the crane arm as shown in fig. 2, and includes: the wireless receiving module, the MPU unit and the alarm are electrically connected in sequence;
the sensor acquires an induced voltage signal of a high-voltage circuit under the overhead line, processes the induced voltage signal sequentially through the filter circuit, the sampling quantization circuit and the digital processing circuit, obtains a preprocessed induced voltage signal and sends the preprocessed induced voltage signal to the receiving end through the wireless transmitting module;
The wireless receiving module in the receiving end receives the preprocessed induced voltage signals and transmits the preprocessed induced voltage signals to the MPU unit, so that the MPU unit compares the preprocessed induced voltage signals according to a set voltage early warning threshold value, and if the voltage early warning threshold value is exceeded, the wireless receiving module controls the alarm module to carry out alarm prompt and sends an early warning signal W to the electric shock prevention early warning monitoring system;
Because the transmitting module is generally installed at a position closest to the high-voltage line in a large-scale engineering machine, and the closer the receiving device is to a driver and other constructors on site, the better the receiving device is, preferably, the transmitting module and the receiving module are connected in a wireless mode. Data is transmitted in a 2.4G wireless mode, the data communication transmission distance can reach more than 200 meters under the condition of no obstacle, and the requirement of on-site distance can be met. The transmitting module (transmitting end) and the receiving module (receiving end) can be powered by a local power supply (12V-24V) and a battery.
The working principle is as follows: the intelligent early warning system carries out front-end analysis processing on the received monitoring signals, takes out 50HZ power frequency signals, eliminates interference signals through digital filtering, analyzes the signal strength of the signals, sends wireless alarm signals to the receiving end when the signal reaches a preset value, and the receiving end alarms after receiving the signal to prompt that the user equipment is close to strong electricity and notices danger. The early warning system only carries out early warning on the voltage of the power frequency of 50HZ-60HZ above 220V, and the circuit is stable and reliable through digital filtering to resist interference. Of particular note is: the intelligent early warning system does not early warn direct current, high frequency and static electricity, the equipment is mainly used for an early warning system for detecting an operation vehicle under construction of an overhead line, and detected voltage can be set through a human-computer interface of a receiving end according to requirements.
The two-dimensional laser radar is arranged on the car hopper and comprises a radar transmitting unit, a radar receiving unit, a control unit, a light splitting element, a scanning mirror and an optical element; wherein the scanning mirror comprises: a first scanning mirror and a second scanning mirror disposed in a conjugate relationship; the sub-element comprises a first, a second and a third optical element;
The radar transmitting unit transmits laser signals to surrounding scanning areas by using a laser, irradiates the same position of the first scanning mirror from different angles, and transmits the laser signals from different angles through the first optical element and the second optical element to be collimated and converged on the second scanning mirror, so that the scanning direction of the laser signals is modulated; reflecting all the incident laser signals to a scanning area by a second scanning mirror, and reflecting echo signals of targets on the scanning area to a third optical element by a light splitting element, so that the echo signals are converged on a detector in a radar receiving unit by the third optical element; the detector sends the received echo signals to the control unit, so that the control unit processes the echo signals to obtain two-dimensional radar data data_r, and the two-dimensional radar data data_r is sent to the electric shock prevention early warning monitoring system through the network module;
In this example, the laser two-dimensional radar is designed by adopting the principle of Time of Flight (TOF), and obtains high-precision distance information by measuring the precise Time of the laser pulse reflection process, and completes two-dimensional scanning of the surrounding environment in cooperation with motor rotation, so that reliable measurement in the range of 40 m and an angle range of 270 degrees can be realized, as shown in fig. 3.
The electric shock prevention early warning monitoring system comprises: initializing a functional module, a normal operation functional module and an intermittent functional module; the workflow is as shown in fig. 4:
The initialization function module reads key configuration data from the configuration file in an initial state, and the method comprises the following steps: m alarm level thresholds { L m}M m=1, a radar set detection distance d 1, a start angle a 1 and an end angle a 2 of radar detection angles, wherein L m represents an mth alarm level threshold;
the normal running functional module defines and initializes N alarm states { H n}N n=1, wherein H n represents an nth alarm state; n represents the type of alarm state;
The normal operation function module receives two-dimensional radar data data_r and an early warning signal W in a current period t 1, and when the two-dimensional radar data data_r and the early warning signal W are received successfully, the corresponding overtime identification bits in the overtime identification bits { lag j}J j=1 are set to be true; wherein lag j represents the jth timeout flag; and performing Data correction on the two-dimensional radar Data data_r by using the formula (1) to obtain corrected two-dimensional radar Data data_r:
Data_r = data_r × Magnification + offset (1)
in the formula (1), magnification denotes a set data transmission multiple, and offset denotes a set data offset;
the normal operation function module compares the corrected Data data_r with the M alarm level thresholds { L m}M m=1, respectively, in the current period t 1, so as to obtain a radar alarm state W r in the current period t 1:
Let W r =0 if data_r > L 1 ;
w r =1 if data_r < L 1 and data_r > L 2;
W r =2 if data_r < L 2 and data_r > L m-1;
W r =m-1 if data_r < L m-1 and data_r > L m;
Let W r = LM if Data_r < L M;
the greater m here, the higher the alarm level represented by L m;
the normal operation function module compares the levels of N current alarm states { W n}N n=1) in a current period t 1 to obtain and output the highest alarm level L max in the current period;
The normal operation function module compares N current alarm states { W n}N n=1 and { H n}N n=1 one by one in the current period t 1, and if W n >0 and W n≠hn, the nth current alarm state { W n}N n=1 in the current period t 1 is stored in the database; otherwise, not storing the data in the database;
W n >0 indicates that an alarm exists for the nth current alarm state, and W n≠hn is that the nth alarm state current alarm level is different from the historical alarm level so as to avoid that a continuous alarm state can be repeatedly stored in the database.
The normal operation function module sequentially assigns N current alarm states { W n}N n=1 to { H n}N n=1) under the current period t 1; this assignment operation is to update the historical alert status.
The intermittent function module judges a timeout state { WT j}J j=1 according to a timeout judging flag bit { lag j}J j=1 in a current period t 2, if lag j is true, the jth timeout state WT j =0, otherwise, the jth timeout state WT j =1; finally, the intermittent function module sets the timeout flag bit { lag j}J j=1 to false.
Here, { lag j}J j=1 is taken as a flag bit for timeout determination, and is set to false, which does not represent that the timeout has occurred, but that a period of time (for example, 30 seconds) has elapsed, during which if the j-th data is received, the value of the corresponding lag j is assigned to true, and after the period of time has elapsed, { WT j}J j=1 is assigned according to { lag j}J j=1.
In this example, the system mainly comprises: the near-electricity voltage early warning information and two-dimensional scanning radar early warning information monitoring page, the two-dimensional scanning radar setting page and the warning history page can acquire related data of a range radar system and a voltage early warning system, perform data analysis and comprehensive analysis, give out graded warning reminding and related information, and perform warning record.
The specific method is as follows:
And acquiring ranging information of the two-dimensional laser scanning radar through a TCP protocol, judging the ranging information according to a set alarm grading threshold value, displaying and sounding the ranging alarm information of a corresponding grade through an upper computer interface if the ranging information exceeds an alarm reference threshold value, and incorporating the alarm information into an alarm database.
The distance measurement information of the high-voltage near-electricity intelligent early warning device is collected through a GPIO protocol, the voltage early warning information is displayed and sounded through an interface of an upper computer (equipment provided with the system) to give out corresponding voltage warning information, and the warning information is incorporated into a warning database.
Through the two-dimensional scanning radar setting page, the two-dimensional laser radar can be connected, the two-dimensional laser radar scanning is started, the radar scanning angle is set, the distance alarm grouping threshold value is set, and the like.
The history alert information may be paged through a view history interface.
The method comprehensively realizes the functions of acquiring the related data of the ranging radar system and the voltage early warning system, analyzing the data, comprehensively analyzing the data, giving out graded warning reminding and related information, performing warning record and the like. An operator can see the operation state of the electric shock prevention early warning system at a glance through the system.
Claims (1)
1. An early warning system for preventing an electric shock during operation of a suspension arm vehicle, which is characterized by comprising: the system comprises a high-voltage near-electricity intelligent early warning device, a two-dimensional laser radar and an electric shock prevention early warning monitoring system;
the high-voltage near-electricity intelligent early warning device comprises: a transmitting end and a receiving end;
The transmitting end is arranged on a hopper of the crane arm and comprises: the device comprises a sensor, a filter circuit, a sampling quantization circuit, a digital processing circuit and a wireless transmitting module, wherein the filter circuit, the sampling quantization circuit, the digital processing circuit and the wireless transmitting module are electrically connected with the sensor in sequence;
the receiving end is arranged on the crane arm and comprises: the wireless receiving module, the MPU unit and the alarm are electrically connected in sequence;
The sensor acquires an induced voltage signal of a high-voltage circuit under the overhead line, processes the induced voltage signal sequentially through the filter circuit, the sampling quantization circuit and the digital processing circuit, and obtains a preprocessed induced voltage signal which is sent to the receiving end through the wireless transmitting module;
The wireless receiving module in the receiving end receives the preprocessed induced voltage signals and transmits the preprocessed induced voltage signals to the MPU unit, so that the MPU unit compares the preprocessed induced voltage signals according to a set voltage early warning threshold value, if the voltage early warning threshold value exceeds the preset voltage early warning threshold value, the wireless receiving module controls the alarm module to carry out alarm prompt, and an early warning signal W is sent to the electric shock prevention early warning monitoring system;
The two-dimensional laser radar is arranged on the car hopper and comprises a radar transmitting unit, a radar receiving unit, a control unit, a light splitting element, a scanning mirror and an optical element; wherein the scan mirror comprises: a first scanning mirror and a second scanning mirror disposed in a conjugate relationship; the light splitting element comprises a first optical element, a second optical element and a third optical element;
the radar transmitting unit transmits laser signals to surrounding scanning areas by using a laser, irradiates the same position of the first scanning mirror from different angles, and transmits the laser signals from different angles through the first optical element and the second optical element to be collimated and converged on the second scanning mirror, so that the scanning direction of the laser signals is modulated; reflecting all the incident laser signals to the scanning area by the second scanning mirror, and reflecting echo signals of targets on the scanning area to a third optical element by the light splitting element, so that the echo signals are converged on a detector in the radar receiving unit by the third optical element; the detector sends the received echo signals to the control unit, so that the control unit processes the echo signals to obtain two-dimensional radar data data_r, and the two-dimensional radar data data_r are sent to the electric shock prevention early warning monitoring system through the network module;
The electric shock prevention early warning monitoring system comprises: initializing a functional module, a normal operation functional module and an intermittent functional module;
The initialization function module reads key configuration data from a configuration file in an initial state, and comprises the following steps: m alarm level thresholds { L m}M m=1, a radar set detection distance d 1, a start angle a 1 and an end angle a 2 of radar detection angles, wherein L m represents an mth alarm level threshold;
The normal operation function module defines and initializes N alarm states { H n}N n=1, wherein H n represents an nth alarm state; n represents the type of alarm state;
The normal operation function module receives the two-dimensional radar data data_r and the early warning signal W under the current period t 1, and when the two-dimensional radar data data_r and the early warning signal W are received successfully, the corresponding overtime identification bits in the overtime identification bits { lag j}J j=1 are set to be true; wherein lag j represents the jth timeout flag; and performing Data correction on the two-dimensional radar Data data_r by using the formula (1) to obtain corrected two-dimensional radar Data data_r:
Data_r = data_r × Magnification + offset (1)
in the formula (1), magnification denotes a set data transmission multiple, and offset denotes a set data offset;
The normal operation function module compares the modified two-dimensional radar Data data_r with M alarm level thresholds { L m}M m=1, respectively, in the current period t 1, so as to obtain a radar alarm state W r in the current period t 1:
Let W r =0 if data_r > L 1;
w r =1 if data_r < L 1 and data_r > L 2;
W r =2 if data_r < L 2 and data_r > L m-1;
W r =m-1 if data_r < L m-1 and data_r > L m;
.
.
.
Let W r = LM if Data_r < L M;
The normal operation function module compares the levels of N current alarm states { W n}N n=1) under the current period t 1 to obtain and output the highest alarm level L max under the current period;
the normal operation function module compares N current alarm states { W n}N n=1 and { H n}N n=1 one by one under the current period t 1, and if W n is greater than 0 and W n≠hn, the N current alarm states { W n} N n=1 under the current period t 1 are stored in a database; otherwise, not storing the data in the database;
The normal operation function module sequentially assigns N current alarm states { W n}N n=1 to { H n}N n=1 under a current period t 1; the intermittent function module judges the overtime state { WT j}J j=1 according to the overtime judging flag bit { lag j}J j=1 under the current period t 2, if the jth flag bit lag j is true, the jth overtime state WT j =0, otherwise, the jth overtime state WT j =1; finally, the intermittent function module sets the timeout flag bit { lag j}J j=1 to false.
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| CN115215240B (en) * | 2022-09-19 | 2023-01-20 | 广东威恒输变电工程有限公司 | Multi-sensing-data-fusion crane electric shock prevention early warning system and method |
| CN115512515B (en) * | 2022-09-30 | 2024-04-09 | 中国南方电网有限责任公司超高压输电公司大理局 | Electric shock prevention operation early warning device |
| CN116553389A (en) * | 2023-06-09 | 2023-08-08 | 国网陕西省电力有限公司商洛供电公司 | A Limit Control System for Lifting Equipment |
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| CN103713293A (en) * | 2013-12-26 | 2014-04-09 | 西安理工大学 | All-fiber Doppler lidar wind field detection system and method |
| CN108198382A (en) * | 2018-01-12 | 2018-06-22 | 沈阳工程学院 | Ultra-high-tension power transmission line anticollision on-line monitoring system and monitoring method |
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