CN105301596A - Distance measuring and alarming method for potential approaching work of crane lifting car - Google Patents

Abstract

The invention belongs to the fields of construction safety monitoring and wireless communication for high-voltage electrified safety operations, and discloses a method for measuring and warning the working distance of a crane lifting vehicle near a potential. The method realizes real-time and accurate measurement of construction personnel through distance measurement, wireless information transmission and data fusion And the distance between the equipment and the charged body and the safety warning to prevent accidents such as electric shock and electric shock caused by too close contact with the charged body, resulting in major safety accidents such as property loss and casualties, and at the same time improve the level of construction safety and greatly improve maintenance efficiency and improve construction safety. The invention is used for construction safety monitoring of high-voltage live safety operations, multi-angle ultrasonic sensors can realize no dead angle measurement; the wireless network installation of WiFi hotspots is flexible; the control room can obtain construction site information at any time to form a distance measurement and safety alarm system, fundamentally Solve the problem of safe distance measurement for high-voltage live-line safe operation construction.

Description

A method for measuring and warning the working distance of a crane lifting vehicle near potential

technical field

The invention relates to construction safety monitoring of high-voltage electrified safety work, in particular to a method for measuring and warning the working distance of a crane lifting vehicle near a potential.

Background technique

With the rapid development of my country's economy, the construction scale of the power grid has developed by leaps and bounds. Live work has also become an important means of testing, repairing and reforming power transmission equipment in the construction of the power grid. It has played a role in the safe and reliable operation of the power system and the improvement of economic benefits very important role. But it faces more and more problems. Live work will bring more difficulties to safe work. In recent years, frequent safety accidents caused by being too close to live equipment have caused serious losses in national economic production. At present, with the progress of live work, the monitored environmental quantities will be more complex. If manual monitoring is used, there will be disadvantages: 1) Since manual monitoring mainly relies on human observation, and observers misdirect due to slack and blocked viewing angles, it will lead to vicious safety accidents such as equipment electric shock damage and personnel electric shock casualties; 2) for The requirements for the professional quality of observers are very high, and it also increases the cost of the project. In this case, the project applies a high-precision ultrasonic sensor ranging method to the measurement of the safety distance of the near-potential operation of the crane lift truck. The device has high measurement accuracy and a large range of measurable distances, which can effectively reduce the safety Accidents happen.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a method for measuring and warning the working distance near the potential of the crane lifting vehicle. This method can not only improve the safety and reliability of the working near the potential, but also effectively reduce the leakage of alarms and enhance the early warning; it breaks through the original system The alarm lags behind the limit of the accident, so that the distance between the boom and the high-voltage line can be known in the operating room, and the impact of electric accidents on personnel can be reduced.

The technical scheme adopted in the present invention is:

A method for measuring and warning the near-potential operation distance of a crane lifting vehicle, comprising the following steps:

Step 1: Use the ultrasonic sensors installed on the front, left, right, and top of the boom to measure the distance of the charged body on the four azimuth planes of the boom, and transmit the obtained data to the single-chip microcomputer of the distance measurement device;

Step 2: Transmit four sets of distance data to the single-chip microcomputer of the alarm device in the control room of the crane lifting car through the wireless WiFi transmitting module;

Step 3: The wireless WiFi receiving module of the alarm device receives four sets of distance data;

Step 4: The single-chip microcomputer of the alarm device receives four sets of distance data, displays its value and direction on the display, processes the four sets of data at the same time, selects the minimum distance data, and judges the minimum distance data: if its value is equal to or less than the working environment If the value is greater than the safety distance of the working environment, then go to step 1;

Step 5: The single-chip microcomputer starts the alarm device and sends out an audible and visual warning signal.

Through the above steps, the working distance measurement and alarm locking of the crane lift car near the potential are completed.

The present invention provides a method for measuring and warning the operating distance of a crane lifting vehicle near a potential, and the technical effects are as follows:

1) The distance measuring device is responsible for measuring the distance between the boom and the surrounding objects when working near the potential, so as to realize the distance measurement without dead angle. The data is transmitted to the crane control room through wireless WiFi to provide reliable data reference for its operation.

2) The alarm device receives the data of the distance measurement device through wireless WiFi. When the received data is equal to or less than the safe distance, the alarm device will send out an audible and visual alarm signal to remind the personnel in the control room of the crane lift car, effectively achieving the role of early warning , to provide safety guarantee for the construction personnel on the boom.

3) The multi-angle ultrasonic sensor can realize no dead angle measurement; the wireless network installation of WiFi hotspot is flexible; the control room can obtain the construction site information at any time.

4) The present invention establishes a method for distance measurement without dead angles in the construction space, which can realize all-round monitoring of the surroundings and ensure the safety of construction personnel. The invention realizes the wireless transmission of the distance measurement information, overcomes the complicated wiring problem of the wired data transmission, improves the efficiency of the data transmission, and reduces the engineering cost. The ultrasonic distance measuring sensor of the present invention receives less interference in measurement, has high measurement precision, and has a large measurable range, thereby greatly improving the reliability of distance measurement.

Description of drawings

Fig. 1 is a hardware connection block diagram of the distance measuring device of the present invention.

Fig. 2 is a flow chart of the distance measurement software program of the present invention.

Fig. 3 is a flow chart of the software program of the alarm device of the present invention.

Fig. 4 is a hardware connection block diagram of the alarm device of the present invention.

detailed description

Fig. 1 is the block diagram of the hardware connection of the distance measuring device of the present invention. When the crane lifting vehicle is carrying out the near potential operation, the distance measuring device is installed directly in front of the boom, on the left, on the right, and above, and the four orientations of the boom moving All-round distance measurement.

Step 1: The distance measuring device measures the distance through the ultrasonic distance measuring sensor. The ultrasonic distance measuring sensor has the characteristics of low interference, high precision, and large measurable range, and can detect even slender objects such as power cables. Ultrasonic ranging sensors in all directions transmit the detected distance between the boom and nearby objects to the STM32 microcontroller.

Step 2: The distance measurement device transmits the measurement data through wireless WiFi technology, as shown in Figure 2, and the specific process of transmission is as follows:

2.1: The MCU starts to initialize the serial port;

2.2: Send OXB1 command to serial port 1;

2.3: Start the mutual transmission program of serial port 1/serial port 2, and wait;

2.4: Determine whether serial port 2 has received data: if serial port 2 has not received data, return to step 2.3; if serial port 2 has received data, the transmission is complete;

Step 3: The alarm device receives data through wireless WiFi technology, as shown in Figure 3, the specific process is:

3.1: The MCU starts to initialize the serial port;

3.2: Start the mutual transmission program of serial port 1/serial port 2, and wait;

3.3: Determine whether serial port 2 has received data: if serial port 2 has not received data, go back to step 3.2; if serial port 2 has received data, go to step 3.4;

3.4: Send the "data received" signal to the serial port 1 to complete the reception of the transmitted data.

Fig. 4 is a hardware connection block diagram of the alarm device of the present invention. Installed in the control room of the crane lift car, it can alarm the operators in the control room.

Step 4: The STM32 single-chip microcomputer of the alarm device receives four sets of distance data, so that it displays its value and direction on the display, and processes the four sets of data at the same time. After comparison, the minimum distance data is obtained, and the minimum distance data is judged: if its value If it is equal to or less than the safe distance of the working environment, go to step 5; if its value is greater than the safe distance of the working environment, go to step 1; the safe distance value is pre-determined before construction according to the relevant specifications of the construction of the adjacent potential and the experience of similar projects in the past ,As shown in Table 1.

Step 5: When the STM32 single-chip microcomputer in the warning device judges that the minimum distance value is equal to or less than the safety distance, start the warning light and send out an audible and visual warning signal.

Table 1: The safety distance value is based on the relevant specifications of the construction near the potential

Claims (1)

1. crane lift truck closes on current potential operation range observation and an alarm method, it is characterized in that comprising the following steps:

Step one: utilize be arranged on the front of arm, left, right, top ultrasonic sensor to the range observation carrying out electrified body of arm four azimuth planes, the data obtained are sent to the single-chip microcomputer of distance-measuring device;

Step 2: by wireless WiFi transmitter module, four groups of range data are transmitted in the single-chip microcomputer of the alarm device of crane lift truck pulpit;

Step 3: the wireless WiFi receiver module of alarm device receives four groups of range data;

Step 4: the single-chip microcomputer of alarm device receives four groups of range data, its numerical value and direction is shown at display, four groups of data are processed simultaneously, select minor increment data, minor increment data are judged: if its value is equal to or less than the safe distance of working environment, then enter step 5; If its value is greater than the safe distance of working environment, then enter step one;

Step 5: single-chip microcomputer starts alarm device, sends sound flash alarm system signal;

By above-mentioned steps, complete and current potential operation range observation and alarm locking are closed on to crane lift truck.