Power transmission and transformation project site construction risk management and control system

Abstract

The invention relates to a power transmission and transformation project site construction risk management and control system, which comprises a flight module, a monitoring module, a risk assessment module and a control module, and is characterized in that the flight module is used for driving the monitoring module to advance along a track of an empty line, taking a section of distance L as a section of risk area during advancing, and averagely dividing the section of risk area into a plurality of local risk areas; all the risk areas are smaller than or equal to the total length of the empty line between the two high-voltage towers, and the risk assessment module is used for assessing the risk level according to the local risk areas exceeding a preset crack threshold value and / or a temperature threshold value and transmitting the risk level to the data receiving module through the control module. According to the invention, the maintenance worker can timely give an early warning at the first time when reaching the area, the risk is effectively avoided, the local area where electric leakage and fracture possibly exist on the empty line can be monitored, the manpower detection cost is reduced, and the maintenance construction efficiency of the maintenance worker is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction safety, and in particular to a risk management and control system for on-site construction of power transmission and transformation projects. Background Art

[0002] On-site construction of power transmission and transformation projects refers to a series of construction activities carried out in the power system to build new or maintain existing transmission lines and substations. Such projects usually include laying and maintaining air lines between multiple high-voltage towers (pole towers).

[0003] When carrying out maintenance on empty wires, workers will climb on the empty wires to perform high-altitude work. Some empty wires may be broken or leak electricity, which makes workers prone to the risk of electric shock or falling from heights, causing accidents. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a risk management and control system for on-site construction of power transmission and transformation projects. The specific technical solution is as follows:

[0005] A field construction risk management and control system for power transmission and transformation projects includes a flight module, a monitoring module, a risk assessment module and a control module. The monitoring module includes an ultrasonic detection unit for detecting surface cracks on an empty line and an infrared thermal imaging detection unit for detecting surface temperature of the empty line. The flight module is used to drive the monitoring module to move forward along the trajectory of the empty line. When moving forward, a distance L is used as a risk area, and a risk area is evenly divided into multiple local risk areas. All risk areas are less than or equal to the total length of the empty line between two high-voltage towers. The ultrasonic detection unit can be preset by the control module to detect a crack threshold on the local risk area, and the infrared hot line detection unit can be preset by the control module to detect a temperature threshold on the local risk area. The risk assessment module is used to assess the risk level according to the local risk area exceeding the preset crack threshold and / or temperature threshold, and transmit the risk level to the data receiving module through the control module for warning maintenance personnel and management personnel.

[0006] Preferably, the flight module comprises a flying drone, the bottom of the flying drone is connected to a guide rod, and the bottom of the guide rod is rotatably connected to a guide block adapted to the empty line.

[0007] Preferably, the ultrasonic detection unit includes a high-energy pulse laser, a laser interferometer, a data acquisition card and a data analysis center, wherein the high-energy pulse laser is used to generate instantaneous thermal stress on the surface of the empty line to excite ultrasonic pulses, the laser interferometer is used to receive reflected ultrasonic signals, the data acquisition card is used to sample and record the received ultrasonic signals at high speed, and the data analysis center is used to process and analyze the collected ultrasonic signals, and the data analysis center can extract the characteristics of the amplitude, phase and time delay of the signal, and perform defect identification and positioning.

[0008] Preferably, when judging the crack threshold, the amplitude of the normal signal is set to 100 units, the phase to 0 degrees, and the time delay to 10 microseconds; the set thresholds are as follows: amplitude threshold: 150 units, phase threshold: ±10 degrees, time delay threshold: 15 microseconds. When the amplitude threshold, phase threshold and time delay threshold are exceeded, it is judged that a crack initially exists in the area.

[0009] Preferably, the infrared thermal imaging detection unit is an infrared thermal imager. When judging the temperature threshold, a relative temperature difference is set. If the temperature of a certain part of the local risk area of ​​the empty line is more than 15°C higher than the ambient temperature, it is preliminarily judged that there is leakage in the area.

[0010] Preferably, when evaluating the risk level, the local risk area of ​​multiple pieces is specifically divided into N pieces. If less than half of the N pieces have cracks exceeding the preset threshold value and / or temperature threshold value, it is determined to be a first-level risk area. If more than half of the N pieces have cracks exceeding the preset threshold value and / or temperature threshold value, it is determined to be a second-level risk area.

[0011] Preferably, it also includes a marking module, which is arranged at the bottom rear end of the flying module and is used to spray different colors and different numbers on the empty line.

[0012] Preferably, it also includes an image monitoring module, which includes a camera installed at the rear end of the bottom of the drone.

[0013] Preferably, it also includes a displacement sensor installed on the flying drone.

[0014] Preferably, the image monitoring module, marking module, detection module, data receiving module, risk assessment module and displacement sensor are all connected to the control module, the data receiving module includes a mobile phone or PC terminal used by maintenance personnel and management personnel, and the control module is a controller.

[0015] Beneficial effects of the present invention:

[0016] 1. When maintenance personnel perform maintenance on the empty line, they first fly the drone at a constant speed along the head and tail ends of the empty line between the two high-voltage towers, and control the operation of the image monitoring module, marking module, detection module, data receiving module, risk assessment module and displacement sensor at the same time. During the flight, the area where the empty line is dangerous can be automatically determined as a first-level risk area and marked with yellow paint, and the second-level risk area can be marked with red paint, so that maintenance workers can be warned in time when they reach this area, effectively avoiding the existence of risks.

[0017] 2. The marking module can be used to spray paint marks on the empty lines in the risk area in ascending form with integers 1, 2, 3... in sequence. The management personnel can further analyze the empty lines with risks through the image monitoring module underground, and transmit the analysis results to the maintenance personnel's mobile phone through the control module, so that the maintenance personnel can obtain the analysis risk information on the empty lines in the risk area corresponding to the marked numbers, so as to improve the accuracy of judging the risks of the empty lines, thereby further avoiding the possibility of risks for the maintenance personnel.

[0018] 3. This application can also automatically monitor local areas on the empty line where leakage and breakage may occur, reducing the manpower detection cost and improving the maintenance efficiency of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the connection structure between the hollow line and the flying drone of the present invention.

[0021] Figure numerals: 1. high-voltage tower; 2. empty line; 3. flying drone; 4. guide rod; 41. guide block; 5. displacement sensor; 6. monitoring module; 7. marking module; 8. image monitoring module. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Example

[0024] Please refer to Figure 1-Figure 2The on-site construction risk management and control system of power transmission and transformation engineering comprises a flight module, a monitoring module 6, a risk assessment module and a control module, wherein the monitoring module 6 comprises an ultrasonic detection unit for detecting surface cracks of the empty line 2 and an infrared thermal imaging detection unit for detecting the surface temperature of the empty line 2, wherein the flight module is used to drive the monitoring module 6 to move forward along the trajectory of the empty line 2, and when moving forward, a distance L is taken as a risk area, and a risk area is evenly divided into a plurality of local risk areas, wherein all risk areas are less than or equal to the total length of the empty line 2 between two high-voltage towers 1, and a crack threshold on the local risk area can be detected by the ultrasonic detection unit preset by the control module, and a temperature threshold on the local risk area can be detected by the infrared hot line detection unit preset by the control module, and the risk assessment module is used to assess the risk level according to the local risk area exceeding the preset crack threshold and / or temperature threshold, and transmit the risk level to the data receiving module through the control module for warning to maintenance personnel and management personnel.

[0025] Specifically, the control module may include a circuit including at least one processor, or a circuit including at least one single-chip microcomputer, or a combination of multiple circuits or chips, as long as the corresponding functions can be realized. It is understandable that for those skilled in the art, the control module 120 may also be a common circuit composed of amplifiers, comparators, triodes, MOS tubes, etc., which realizes the corresponding functions in a pure hardware manner.

[0026] In a preferred embodiment of the present application, the flight module includes a flying drone 3, the bottom of the flying drone 3 is connected to a guide rod 4, the bottom of the guide rod 4 is rotatably connected to a guide block 41 adapted to the empty line 2, and the cooperation between the guide rod 4 and the guide block 41 can effectively allow the drone to move forward along the empty line 2. Specifically, the guide block 41 can be made of a material with insulating and wear-resistant properties in the prior art, such as ceramic materials, silicon carbide and other materials.

[0027] In a preferred embodiment of the present application, the ultrasonic detection unit includes a high-energy pulse laser, a laser interferometer, a data acquisition card and a data analysis center, wherein the high-energy pulse laser is used to generate instantaneous thermal stress on the surface of the empty line 2 to excite ultrasonic pulses. Specifically, commonly used laser types may include fiber lasers. The laser interferometer is used to receive reflected ultrasonic signals. Specifically, the laser interferometer obtains ultrasonic signals by detecting tiny displacements on the surface of the material. The data acquisition card is used to sample and record the received ultrasonic signals at high speed. Specifically, the high-speed data acquisition card can capture microsecond or even nanosecond time resolution signals. The data analysis center is used to process and analyze the collected ultrasonic signals, and the data analysis center can extract the amplitude, phase and time delay characteristics of the signal, and perform defect identification and positioning.

[0028] In a preferred embodiment of the present application, when judging the crack threshold, the amplitude of the normal signal is set to 100 units, the phase is 0 degrees, and the time delay is 10 microseconds. The set thresholds are as follows: amplitude threshold: 150 units, phase threshold: ±10 degrees, time delay threshold: 15 microseconds. When the amplitude threshold, phase threshold and time delay threshold are exceeded, it is judged that there is a preliminary crack in the area. Specifically, in subsequent detection, if it is found that the signal amplitude of a certain section of high-voltage empty line 2 is 160 units, the phase is +15 degrees, and the time delay is 18 microseconds, all of which exceed the set thresholds, it can be preliminarily judged that there will be cracks in the area.

[0029] In a preferred embodiment of the present application, the infrared thermal imaging detection unit is an infrared thermal imager. Specifically, the infrared thermal imager is installed at the bottom of the flying drone 3. When judging the temperature threshold, the relative temperature difference is set. If the temperature of a part of the risk area on the air line 2 is more than 15°C higher than the ambient temperature, it is preliminarily judged that there is leakage in the area.

[0030] In a preferred embodiment of the present application, when evaluating the risk level, the local risk area of ​​multiple pieces is specifically divided into N pieces. If less than half of the N pieces exceed the preset crack threshold and / or temperature threshold, it is determined to be a first-level risk area. If more than half of the N pieces exceed the preset crack threshold and / or temperature threshold, it is determined to be a second-level risk area.

[0031] In a preferred embodiment of the present application, it also includes a marking module 7, which is arranged at the bottom rear end of the flight module. The marking module 7 is used to spray different colors and different numbers on the empty line 2. Specifically, the first-level risk area can be painted yellow, and the second-level risk area can be painted red. The marking module 7 can be composed of a paint storage box, a micro pump body, a pipe and a nozzle in the prior art to achieve a painting effect. This technology is existing, so this application will not repeat it.

[0032] In a preferred embodiment of the present application, an image monitoring module 6 is also included. The image monitoring module 6 includes a camera installed at the rear end of the bottom of the drone. The camera can capture the image of the empty line 2 to facilitate analysis by management personnel.

[0033] In a preferred embodiment of the present application, a displacement sensor 5 is also included which is installed on the flying drone 3. A timer or the like may also be installed on the drone, so as to conveniently control the moving distance of the flying drone 3 on the air line 2.

[0034] In a preferred embodiment of the present application, the image monitoring module 6, marking module 7, detection module, data receiving module, risk assessment module and displacement sensor 5 are all connected to the control module, and the connection method is electrical or wireless communication connection, which is convenient for control. The data receiving module includes a mobile phone or PC terminal used by maintenance personnel and managers, and the control module is a controller.

[0035] Specifically, when the maintenance personnel perform maintenance on the empty line 2, firstly, the flying drone 3 is made to fly at a constant speed along the head and tail ends of the empty line 2 between the two high-voltage towers 1, and at the same time, the operation of the image monitoring module 6, the marking module 7, the detection module, the data receiving module, the risk assessment module and the displacement sensor 5 are controlled. During the flight, the area where the empty line 2 is dangerous can be automatically determined as a first-level risk area, and the mark is painted yellow, and the second-level risk area is painted red, so that the maintenance workers can be warned in time when they reach this area to avoid the existence of risks;

[0036] And the marking module 7 can be used to sequentially spray paint marks on the empty lines 2 in the risk area after determination in the form of integers 1, 2, 3...in increasing order. The management personnel can further analyze the empty lines 2 with risks through the image monitoring module 6 underground, and transmit the analysis results to the mobile phone of the maintenance personnel through the control module, so that the maintenance personnel can obtain the analysis risk information on the empty lines 2 in the risk area corresponding to the marked numbers, so as to improve the accuracy of judging the risks of the empty lines 2, thereby further avoiding the possibility of risks for the maintenance personnel;

[0037] On the other hand, the present application can also automatically monitor local areas on the idle line 2 where leakage and breakage may occur, thereby reducing the manpower detection cost and improving the maintenance efficiency of the maintenance personnel.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The on-site construction risk management and control system for power transmission and transformation projects is characterized by: It includes a flight module, a monitoring module, a risk assessment module and a control module. The monitoring module includes an ultrasonic detection unit for detecting surface cracks on the empty line and an infrared thermal imaging detection unit for detecting surface temperature of the empty line. The flight module is used to drive the monitoring module to move forward along the trajectory of the empty line. When moving forward, a distance is taken as a risk area, and a risk area is evenly divided into multiple local risk areas. All risk areas are less than or equal to the total length of the empty line between two high-voltage towers. The ultrasonic detection unit preset by the control module detects a crack threshold on the local risk area, and the infrared hot line detection unit preset by the control module detects a temperature threshold on the local risk area. The risk assessment module is used to assess the risk level according to the local risk area exceeding the preset crack threshold and / or temperature threshold, and transmit the risk level to the data receiving module through the control module for warning maintenance personnel and management personnel.

2. The on-site construction risk management and control system for power transmission and transformation projects according to claim 1 is characterized by: The flight module comprises a flying drone, the bottom of which is connected with a guide rod, and the bottom of which is rotatably connected with a guide block adapted to the empty line.

3. The on-site construction risk management and control system for power transmission and transformation projects according to claim 2 is characterized by: The ultrasonic detection unit includes a high-energy pulse laser, a laser interferometer, a data acquisition card and a data analysis center, wherein the high-energy pulse laser is used to generate instantaneous thermal stress on the surface of the empty line to stimulate ultrasonic pulses, the laser interferometer is used to receive reflected ultrasonic signals, the data acquisition card is used to sample and record the received ultrasonic signals at high speed, and the data analysis center is used to process and analyze the collected ultrasonic signals, and the data analysis center can extract the characteristics of the amplitude, phase and time delay of the signal, and perform defect identification and positioning.

4. The power transmission and transformation project on-site construction risk management and control system according to claim 3 is characterized by: When judging the crack threshold, the amplitude of the normal signal is set to 100 units, the phase to 0 degrees, and the time delay to 10 microseconds; The set thresholds are as follows: amplitude threshold: 150 units, phase threshold: ±10 degrees, time delay threshold: 15 microseconds. When the amplitude threshold, phase threshold and time delay threshold are exceeded, it is determined that a crack is initially present in the area.

5. The on-site construction risk management and control system for power transmission and transformation projects according to claim 4 is characterized by: The infrared thermal imaging detection unit is an infrared thermal imager. When judging the temperature threshold, a relative temperature difference is set. If the temperature of a certain part of the local risk area of ​​the empty line is more than 15°C higher than the ambient temperature, it is preliminarily judged that there is leakage in the area.

6. The power transmission and transformation project on-site construction risk management and control system according to claim 5 is characterized by: When evaluating the risk level, the local risk area of ​​multiple pieces is specifically divided into N pieces. If less than half of the N pieces exceed the preset crack threshold and / or temperature threshold, it is determined to be a first-level risk area. If more than half of the N pieces exceed the preset crack threshold and / or temperature threshold, it is determined to be a second-level risk area.

7. The power transmission and transformation project on-site construction risk management and control system according to claim 6 is characterized by: It also includes a marking module, which is arranged at the bottom rear end of the flying module and is used for spraying different colors and different numbers on the empty line.

8. The power transmission and transformation project on-site construction risk management and control system according to claim 7 is characterized by: It also includes an image monitoring module, which includes a camera installed at the rear end of the bottom of the drone.

9. The power transmission and transformation project on-site construction risk management and control system according to claim 8 is characterized by: Also included are displacement sensors mounted on flying drones.

10. The power transmission and transformation project on-site construction risk management and control system according to claim 9, characterized in that: The image monitoring module, marking module, detection module, data receiving module, risk assessment module and displacement sensor are all connected to the control module. The data receiving module includes a mobile phone or PC terminal used by maintenance personnel and management personnel, and the control module is a controller.

Images