CN104266686A - Method for wirelessly monitoring cross spanning of electric transmission line and device - Google Patents

Abstract

The invention relates to the monitoring of crossing and crossing of transmission lines, in particular to a wireless monitoring method and device for crossing and crossing of power transmission lines. The invention solves the problems of potential safety hazards and inaccurate monitoring in the existing wireless monitoring method for crossing and crossing transmission lines. It is realized according to the following steps: 1) Arrange three video monitoring devices on the ground where the power transmission line crosses; 2) The video monitoring device collects local temperature and humidity signals, corresponding video signals and its own ID information through wireless The communication is sent to the monitoring center; 3) In the monitoring center, according to the ID information, index the data of each parameter at the crossing point from the database; use the OPENGL tool to analyze the three photo images taken in different directions, and analyze and calculate the crossing distance of the power line; 4) Calculate the sag value of the intersection in three-dimensional space, the maximum stress of the overhead line and other data; 5) Compare the above data with the national standard to judge whether it meets the standard.

Description

Transmission line crossover wireless monitoring method and device

technical field

The invention relates to the monitoring of crossing and crossing of transmission lines, in particular to a wireless monitoring method and device for crossing and crossing of power transmission lines.

Background technique

When laying overhead transmission lines, engineering lines will inevitably cross houses, trees and power lines. When the ambient temperature rises or the load of the power line increases, large sags and wire elongation will occur at the intersections. If not dealt with in time, it may cause major power accidents such as single-phase grounding or phase-to-phase short-circuit of the transmission line. At present, most of the methods to solve this problem are circuit maintenance personnel's itinerant survey and on-site measurement, and there are few wireless monitoring devices. Even if there are a small number of wireless monitoring solutions, most of them hang the ranging device on the power line, and fix the video monitoring device and communication module on the tower. This method not only increases the hidden danger of short circuit and open circuit of the line, but also the high-intensity electromagnetic field of the power line also affects the work of the monitoring device itself, thus affecting the monitoring accuracy.

Contents of the invention

The invention solves the problems of potential safety hazards and inaccurate monitoring in the existing wireless monitoring method for crossing and crossing transmission lines, and provides a wireless monitoring method and device for crossing and crossing transmission lines.

The present invention is realized by adopting the following technical scheme: the wireless monitoring method for crossing and crossing of transmission lines is realized according to the following steps: 1) on the ground where the power transmission line crosses and crosses, take the projection of the crossing and crossing on the ground as the center, and space Three video monitoring devices that can collect temperature and humidity signals, carry ID information at the intersection, and have wireless communication functions are arranged at 120 degrees; The monitoring devices collect video signals that cross distances and scales from their respective perspectives; 2) The video monitoring devices send the collected local temperature and humidity signals, corresponding video signals and their own ID information to the monitoring center through wireless communication; 3) In the The monitoring center, according to the ID information, indexes the parameter data of the intersection from the database, and these data include: tower data, wire data, topography data and meteorological data. Among them, the tower data includes: tower type, tower material and tower number, etc.; wire data includes: wire specification, wire outer diameter, final elastic coefficient, and linear expansion coefficient, etc.; terrain data includes: line number, longitude, latitude and altitude etc. Meteorological data include: the highest temperature in several periods in the past years, the extreme minimum temperature in the past years, the average temperature in the past years, and the maximum wind speed in the past years. 4) Combining the on-site temperature and humidity information, the crossing distance and the original data in the database, using image processing technology to simulate the three-dimensional coordinates of the crossing site, and calculate the crossing distance in the three-dimensional space The sag value at the crossing point, the maximum stress of the overhead line and other data; 5) Compare the above data with the national standard to judge whether it meets the standard.

The method of the invention is safe, efficient and has good real-time performance. Since the video monitoring device is installed on the ground away from the power line, the monitoring device is less disturbed by the electromagnetic field, so the stability and reliability of the monitoring process can be guaranteed. The image is obtained from three different directions, and with the distance measurement of the ruler, the line-of-sight error in the image processing process of a single photo is eliminated, and it also makes up for the defect that ordinary distance measuring devices cannot accurately measure the distance between two crossing wires.

The video monitoring device realizing the method of the present invention includes an MCU processing chip, the input end of the MCU processing chip is connected with temperature and humidity sensors, a camera, and the output end of the MCU processing chip is connected with a 3G module and a radio frequency module. When working, the MCU processing chip receives the temperature and humidity signals of the cross-spanning site regularly collected by the temperature and humidity sensors, and at the same time receives the image information (including the size scale) of the cross-spanning place captured by the camera, and then passes the 3G module. The temperature and humidity information and the ID therein are transmitted to the monitoring center. The radio frequency module is used for internal communication of each video monitoring device, and its function is to synchronize the shooting time of images.

The structure design of the video monitoring device is reasonable and unique, and the work is stable and reliable.

Description of drawings

Fig. 1 is the implementation schematic diagram (top view) of the method of the present invention;

Fig. 2 is a schematic diagram (three-dimensional) of the implementation of the method of the present invention; this figure shows the phase-to-phase transposition of the transmission line, and the phase-to-phase transposition lines cross over.

Fig. 3 is the structural representation of dimension scale;

Fig. 4 is a schematic structural diagram of a video monitoring device implementing the method of the present invention.

In the figure: 1 - video monitoring device, 2 - size scale, 3 - crossover (object).

Detailed ways

The wireless monitoring method for transmission line crossing is realized according to the following steps: 1) On the ground where the transmission line crosses and crosses, with the projection of the crossing on the ground as the center, arrange three monitors that can collect temperature and humidity at intervals of 120 degrees. signal, a video monitoring device 1 that carries the ID information of the intersection and has a wireless communication function; a regular triangular prism-shaped size scale 2 is set on the ground directly below the intersection, and each video monitoring device collects the cross from its own perspective. The video signal of the distance and size scale; 2) The video monitoring device sends the collected local temperature and humidity signals, the corresponding video signal and its own ID information to the monitoring center through wireless communication; 3) In the monitoring center, according to the ID information, from The data of various parameters at the intersections are indexed in the database, and these data include: tower data, wire data, terrain and geomorphic data, and meteorological data. Among them, the tower data includes: tower type, tower material and tower number, etc.; wire data includes: wire specification, wire outer diameter, final elastic coefficient, and linear expansion coefficient, etc.; terrain data includes: line number, longitude, latitude and altitude etc. Meteorological data include: the highest temperature in several periods in the past years, the extreme minimum temperature in the past years, the average temperature in the past years, and the maximum wind speed in the past years. 4) Combining the on-site temperature and humidity information, the crossing distance and the original data in the database, using image processing technology to simulate the three-dimensional coordinates of the crossing site, and calculate the crossing distance in the three-dimensional space The sag value at the crossing point, the maximum stress of the overhead line and other data; 5) Compare the above data with the national standard to judge whether it meets the standard.

The video monitoring device realizing the method of the present invention includes an MCU processing chip, the input end of the MCU processing chip is connected with temperature and humidity sensors, a camera, and the output end of the MCU processing chip is connected with a 3G module and a radio frequency module. During specific implementation, the whole device is powered by a lithium polymer battery, and the solar panel supplies electricity for the lithium polymer battery. The device is powered by batteries and has high requirements for low power consumption. Therefore, it is recommended that the MCU processing chip use TI's 430 series single-chip microcomputer, and the radio frequency module recommends using the model SX1212 ultra-low power consumption radio frequency chip.

Claims (3)

1. A wireless monitoring method for transmission line crossover, characterized in that it is implemented in the following steps: 1) On the ground where the transmission line crossover is, the projection of the crossover on the ground is the center, and the interval is 120 degrees. Three video monitoring devices (1) capable of collecting temperature and humidity signals, carrying ID information at the intersection and having wireless communication functions; a regular triangular prism-shaped size scale (2) is set on the ground directly below the intersection, Each video monitoring device collects video signals crossing the distance and size scale from its own perspective; 2) The video monitoring device sends the collected local temperature and humidity signals, corresponding video signals and its own ID information to the monitoring center through wireless communication; 3) In the monitoring center, according to the ID information, index the data of each parameter at the crossing point from the database; use the OPENGL tool to analyze the three photo images taken in different directions, and analyze and calculate the crossing distance of the power line; 4) Comprehensive on-site temperature, Humidity information, crossing distance and the original data in the database, simulate the three-dimensional coordinates of the crossing site through image processing technology, and calculate the sag value of the crossing point in the three-dimensional space, the maximum stress of the overhead line and other data; 5) The above Each data is compared with the national standard to judge whether it meets the standard. 2. realize as claimed in claim 1 the transmission line crosses the video monitoring device that spans the wireless monitoring method, it is characterized in that comprising MCU processing chip, the input end of MCU processing chip is connected with temperature, humidity sensor, camera, the output end of MCU processing chip It is connected with 3G module and radio frequency module. 3. The video monitoring device according to claim 2, characterized in that the MCU processing chip adopts the 430 series single-chip microcomputer of TI Company, and the radio frequency module adopts the model SX1212 ultra-low power consumption radio frequency chip.