CN105303759A - High-voltage transmission line anti-external-damage alarm system applicable to jittering environment - Google Patents

Abstract

The invention provides a high-voltage transmission line anti-breaking alarm system suitable for jittering environment, which includes a front-end device and a background device; Processing board, sound and light alarm; background devices include background monitoring server, PC workstation, monitoring mobile phone, iPAD mobile terminal; embedded image processing board is expanded with WIFI communication module, 3G communication module and GPS module; embedded image The processing board is an embedded image processing board capable of performing image anti-shake processing on images captured by the infrared camera in a shaking state. The invention has the advantages of simple structure, strong environmental adaptability, high reliability, good real-time monitoring during use, and can carry out anti-shake repair processing on images captured under the vibration of the camera device caused by strong wind and heavy machinery construction.

Description

Anti-breaking alarm system for high-voltage transmission lines suitable for jittering environments

technical field

The invention relates to the technical field of electric facility safety monitoring, in particular to a high-voltage transmission line anti-breaking alarm system suitable for jittering environments.

Background technique

With the rapid development of economy, the scope of urban and rural infrastructure construction is getting bigger and bigger. Human factors such as illegal construction operations in the high-voltage transmission line protection area, illegal tree planting and house building, and external force damage caused by natural factors such as windy tree branches and kites mounted on the power line have brought serious problems to the safe operation of high-voltage transmission lines. threat. If it is not discovered and dealt with in time, it will easily cause disasters such as large-scale power outages, fires and even casualties, resulting in huge direct and indirect economic losses. Therefore, the effective monitoring and early warning of the breaking behavior of high-voltage transmission lines has been increasingly recognized and valued by the power supply department.

At present, the device, system or method for monitoring and early warning of the breaking behavior of high-voltage transmission lines has been studied. For example, the Chinese patent document with the application publication number CN103501055A discloses a "monitoring device for preventing breaking of high-voltage transmission lines". It consists of front-end equipment and indoor monitoring equipment. The front-end equipment includes solar panels, batteries, surveillance cameras and 3G terminal equipment; the indoor monitoring equipment is composed of image workstations, PC workstations, and SMS calling devices; and the application publication number is CN104464149A Chinese patent literature discloses a "monitoring and management system for anti-breakage of electric power facilities", which mainly includes cameras, image processors, wireless communication components, flash alarm devices, etc., through front-end on-site camera, image signal processing, and then alarm according to the situation . At present, such as the aforementioned monitoring and early warning system or device, it can achieve a certain monitoring effect when the weather environment is good and there is no large vibration at the location of the front-end device, that is, the camera device is in a stable state. However, since the camera device in the front-end device is usually installed on the tower of the high-voltage transmission line, when the actual work encounters strong winds, heavy machinery construction under the tower, etc. when monitoring and early warning is most needed, the tower will be damaged due to strong wind or heavy machinery construction. The impact of vibration and other external factors causes the camera device on the tower to shake a lot, which will inevitably make the images captured by it appear intermittent and unclear. However, the current common monitoring and early warning systems or devices do not consider the camera device. The working condition of jitter makes the high-voltage cable unable to work effectively when the monitoring and early warning is most needed, which seriously affects the use effect and working reliability of the monitoring and early warning system or device.

Contents of the invention

The purpose of the present invention is: to solve the problems raised by the background technology, to provide a simple structure, strong environmental adaptability, high reliability, good real-time monitoring during use, and can effectively overcome harsh winds, vibrations of camera devices caused by heavy machinery construction, etc. An anti-break alarm system for high-voltage transmission lines suitable for jittering environments under working conditions.

The technical solution of the present invention is: the high-voltage transmission line anti-breakage alarm system suitable for the jittering environment of the present invention includes a front-end device and a background device; the above-mentioned front-end device includes a box body, a solar panel, a battery, and an audible and visual alarm; The background device includes a background monitoring server, a PC workstation, and a mobile phone for monitoring; its structural characteristics are: the above-mentioned front-end device also includes a lightning arrester, an infrared camera, a power management board, and an embedded image processing board; WIFI communication module, 3G communication module and GPS module; background device also includes iPAD mobile terminal;

The above lightning arrester, solar panel, infrared camera and sound and light alarm are arranged on the box body; the storage battery, power management board and embedded image processing board are arranged in the box body;

The infrared camera is electrically connected with the embedded image processing board for two-way signals; the sound and light alarm is electrically connected with the embedded image processing board for signals; The control signal is electrically connected; the power management board provides working power for the front-end device and is controlled by the embedded image processing board to manage the power supply and power failure of the infrared surveillance camera and the sound and light alarm;

The PC workstation is connected to the background monitoring server with two-way signal electrical connection; the monitoring mobile phone is connected to the background server through wireless communication; the background monitoring server is connected to the embedded image processing board through the 3G network through the 3G communication module; the iPAD mobile terminal is connected to the embedded image processing board through the WIFI communication module. Type image processing board communication connection; GPS module is used to locate the front-end device and provide time information;

The above-mentioned embedded image processing board is an embedded image processing board capable of performing anti-shake processing on images captured by an infrared camera in a shaken state.

A further solution is: the method for performing image anti-shake processing on the embedded image processing board includes the following steps:

①Take the first frame picture in the video as the reference image;

②Using the SURF algorithm to extract scale-invariant feature points from the first frame of the video;

③ Each frame in the video is matched with the reference image related feature points;

④ Obtain the distance between a feature point of the reference image and a matching feature point of the i-th frame image as , let the frame rate of the video be , then the velocity of feature point movement is , and then set a rate threshold T, if , remove the feature point, otherwise keep the feature point;

⑤Motion compensation for the shaken image: through the feature point coordinates of the first frame in the obtained video The coordinates of the feature points matching the jth frame , you can get the image offset of the jth frame ,but , and satisfy:

The jth frame picture by panning Achieving dithered frames motion compensation to obtain a stabilized image;

⑥Save the motion-compensated image of the jth frame, and do the same processing on other frames until the end of the video.

The preferred technical solution is: the above-mentioned infrared monitoring camera is a dome camera equipped with a pan-tilt control system and a maximum monitoring distance of 100m.

The preferred technical solution is: the above-mentioned embedded image processing board is an image processing board using a quad-core multi-processor chip based on ARM9.

The present invention has positive effects: (1) The high-voltage transmission line anti-breakage alarm system of the present invention, which is suitable for jittering environments, has the function of image anti-shaking processing. When it is in use, the infrared camera will vibrate during strong winds and heavy machinery construction When the monitored image shakes, the embedded image processing board adopts high-precision feature point detection and image matching technology, which can effectively provide fast, effective and real-time compensation for the shaken video, so that it can still achieve normal alarm ;Using infrared-assisted high-definition camera, it has night vision function, can monitor day and night, and has good working reliability.

(2) The high-voltage transmission line anti-break alarm system suitable for jittering environments of the present invention has a simple and firm structure, simple manufacturing and processing, low cost, and is easy to mass-produce. (3) The anti-breakage alarm system for high-voltage transmission lines of the present invention, which is suitable for jittering environments, can capture in real time on-site anti-breakage vehicle targets and send them to the server for storage, and push them to the corresponding mobile monitoring terminal. (4) The high-voltage transmission line anti-breakage alarm system suitable for jittering environment of the present invention, the high-voltage transmission line anti-breakage alarm system suitable for jittering environment of the present invention has high real-time performance, full automation, high integration and light weight , Wide range of applications.

Description of drawings

Fig. 1 is a structural schematic block diagram of the present invention;

Fig. 2 is the flow chart of the image processing method for the anti-break target implemented by the embedded image processing board in Fig. 1 when in use;

Fig. 3 is a flowchart of a method for processing images captured by an infrared camera in a shaken state implemented by the embedded image processing board in Fig. 1 when used.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

(Example 1)

As shown in Fig. 1, the high-voltage transmission line anti-break alarm system of this embodiment, which is suitable for jittering environments, mainly consists of a front-end device and a background device.

The front-end device consists of box body, lightning arrester, solar panel, infrared camera, sound and light alarm, battery, power management board and embedded image processing board; the embedded image processing board is expanded with WIFI communication module, 3G communication module and GPS module.

Lightning arresters, solar panels, infrared cameras and sound and light alarms are arranged on the box body; storage batteries, power management boards and embedded image processing boards are arranged in the box body.

The lightning arrester is used for lightning protection of the front-end device; the solar panel, the storage battery and the power management board are sequentially connected in series, and the power management board is also electrically connected with the embedded image processing board and controlled by the embedded image processing board. The power management board is mainly used to provide +5V and +12V working power for the front-end device; under the control of the embedded image processing board, it manages the power supply and power failure of the infrared surveillance camera and the sound and light alarm.

The infrared camera is used for target monitoring of the area to be monitored on the high-voltage transmission line, and the infrared camera is electrically connected with the embedded image processing board for two-way signals. In this embodiment, the infrared camera is composed of a ball machine, the maximum monitoring distance is 100m, and the power supply adopts 12V power supply, which can continuously monitor day and night, and has a pan-tilt control system. In this embodiment, when the infrared camera is working, it is used to capture a picture of the scene every 1 minute for analyzing the anti-break target.

The embedded image processing board is used to process the image signal sent by the infrared camera in real time and perform target recognition, control the opening and closing of the sound and light alarm according to the set threshold, and is responsible for the information transmission and communication with the background device, and the power management board Take control.

The GPS module extended on the embedded image processing board is used to locate the front-end device and provide time information; the WIFI communication module and 3G communication module are used to be responsible for the signal transmission and communication between the embedded image processing board and the background device.

The background device is mainly composed of a background monitoring server, a PC workstation, a monitoring mobile phone and an iPAD mobile terminal held by supervisors.

The background monitoring server is used to communicate with the embedded image processing board through the 3G network; receive the on-site alarm picture obtained through image processing sent by the embedded image processing board through the 3G communication module expanded on it; push the received on-site alarm picture to The PC workstation and the monitoring mobile phone held by the supervisor send short messages to the monitoring mobile phone held by the supervisor, and transmit the relevant control commands sent by the PC workstation to the embedded image processing board.

The monitoring mobile phones held by supervisors are used to receive on-site alarm pictures and SMS messages pushed by the background monitoring server; remote control adjusts the monitoring angle of view of the infrared camera.

When the iPAD mobile terminal is used for the initial installation of the front-end device, the installation site staff communicates with the WIFI communication module expanded on the embedded image processing board through the iPAD mobile terminal to realize the parameter setting of the embedded image processing board.

The PC workstation is electrically connected with the background monitoring server with two-way signals; the mobile phone for monitoring is connected to the background server through wireless communication; the background monitoring server communicates with the embedded image processing board through the 3G network through the 3G communication module expanded and set on the embedded image processing board; When in use, the iPAD mobile terminal communicates with the embedded image processing board via the WIFI communication module extended on the embedded image processing board.

The aforementioned embedded image processing board is an image processing board using a quad-core multiprocessor chip based on ARM9, equipped with an Ubuntu 12.04 operating system, and supports the installation of the OpenCV visual processing library.

Referring to Fig. 2 and Fig. 3, the processor chip on the embedded image processing board has a built-in anti-break target image processing method and a method for processing images captured by an infrared camera in a shaking state implemented by the embedded image processing board. Dither method program. Wherein, the image processing method program of the anti-breakage target is the prior art, and will not be described in detail.

The main steps of the image stabilization method are as follows:

①Take the first frame picture in the video as the reference image;

②Extract scale-invariant feature points from the first frame of the video; the detection and extraction of feature points is the key technology for image registration. Through the research, it is found that the more uniform the feature points are distributed in the image, the more the matching of feature points can reflect the actual movement of the camera; the feature point extraction algorithm adopts the SURF algorithm, which can better adapt to the matching of various scenes;

③ Each frame in the video is matched with the reference image related feature points;

④ Obtain the distance between a feature point of the reference image and a matching feature point of the i-th frame image as , assuming the frame rate of the video is , then the velocity of feature point movement is , and then set a rate threshold T, if , remove the feature point, or keep the feature point; because the shaking rate in the video is generally small, while the speed of the moving target is relatively high.

⑤ Carry out relevant motion compensation for the shaken image: through the obtained feature point coordinates of the first frame in the video The coordinates of the feature points matching the jth frame , you can get the image offset of the jth frame ,but , and satisfy:

Therefore, in order to compensate for the random jitter of the video, the j-th frame picture in the video (jitter frame) by panning Achieving dithered frames motion compensation to obtain a stabilized image;

⑥Save the motion-compensated image of the jth frame, and perform related compensation on other frame images until the end of the video.

The high-voltage transmission line anti-breaking alarm system suitable for the jittering environment of this embodiment, when it is applied, the front-end device is fixed on the tower of the predetermined monitoring point of the high-voltage transmission line through its box body, and more than one front-end device is set. The number of specific settings is determined according to the monitoring range and monitoring points required for the high-voltage transmission line.

The anti-breaking alarm system for high-voltage transmission lines in this embodiment, which is suitable for jittering environments, has the following characteristics:

①Accurate target detection: The embedded image processing board adopts a virtual coil generation method based on statistical geometry, selects a mixed Gaussian distribution model for background extraction and update, and introduces motion detection theory through the multi-threshold joint decision-making method of Bayesian decision theory Analyze the trajectory of the target and assist in decision-making, so as to optimize the false detection rate index.

②It has anti-shake function and can work around the clock: When the monitoring image shakes due to the vibration of the infrared camera caused by strong winds and heavy machinery construction, the embedded image processing board adopts high-precision feature point detection and image matching technology, which can effectively reduce the vibration. The video provides fast, effective and real-time compensation, so that it can still achieve normal alarm; the infrared-assisted high-definition camera has night vision function, can be monitored day and night, and has good working reliability.

③Strong anti-interference ability: The embedded image processing board adopts industrial-grade embedded motherboard design, which has good anti-interference performance and good grounding installation measures, and can realize accurate and complete collection of video data in UHV electromagnetic environment, as well as Accurate control of front-end equipment, no video interference phenomena such as snowflakes, black lines, etc., and failure phenomena such as loss of control of the pan/tilt of the infrared camera.

④ Low power consumption of the system: the embedded image processing board adopts low power consumption design, and all peripherals are low power consumption devices. The camera has the advantage of saving power consumption.

⑤ Good real-time early warning: When an anti-breakage target appears, the system can send an alarm message to the mobile phone of the staff in real time, and the mobile phone App software will vibrate in real time to remind and display the current on-site alarm picture.

⑥Convenient construction on site: the front-end device adopts self-power supply technology of solar panels and batteries, no need to erect special power supply lines, and is suitable for installation in various usage occasions; the front-end device is easy to disassemble and assemble, meeting the needs of quick installation and temporary replacement of monitoring tower positions, single equipment The weight is not more than 16kg.

⑦Easy post-maintenance: no need to replace the battery regularly, and has a long service life. Relevant parameter commands can be set remotely through mobile phones and PC workstations. After successful installation, it is basically maintenance-free.

The above embodiments are descriptions of specific implementations of the present invention, rather than limitations of the present invention. Those skilled in the relevant technical fields can also make various transformations and changes without departing from the spirit and scope of the present invention. Corresponding equivalent technical solutions, therefore all equivalent technical solutions should fall into the patent protection scope of the present invention.

Claims (4)

1. A high-voltage transmission line anti-breaking alarm system suitable for a jittering environment, comprising a front-end device and a background device; the front-end device includes a box body, a solar panel, a storage battery, and an audible and visual alarm; the background device includes a background monitoring Server, PC workstation, mobile phone for monitoring; it is characterized in that: described front-end device also comprises arrester, infrared camera, power management board and embedded image processing board; Embedded image processing board is expanded and provided with WIFI communication module, 3G Communication module and GPS module; background device also includes iPAD mobile terminal; The lightning arrester, solar panel, infrared camera and sound and light alarm are arranged on the box body; the storage battery, power management board and embedded image processing board are arranged in the box body; The infrared camera is electrically connected with the embedded image processing board for two-way signals; the sound and light alarm is electrically connected with the embedded image processing board for signals; The control signal is electrically connected; the power management board provides working power for the front-end device and is controlled by the embedded image processing board to manage the power supply and power failure of the infrared surveillance camera and the sound and light alarm; The PC workstation is connected to the background monitoring server with two-way signal electrical connection; the monitoring mobile phone is connected to the background server through wireless communication; the background monitoring server is connected to the embedded image processing board through the 3G network through the 3G communication module; the iPAD mobile terminal is connected to the embedded image processing board through the WIFI communication module. Type image processing board communication connection; GPS module is used to locate the front-end device and provide time information; The embedded image processing board is an embedded image processing board capable of performing anti-shake processing on images captured by an infrared camera in a shaken state. 2. The high-voltage transmission line anti-breaking alarm system suitable for a jittering environment according to claim 1, wherein the method for performing image anti-shaking processing on the embedded image processing board comprises the following steps: ①Take the first frame picture in the video as the reference image; ②Using the SURF algorithm to extract scale-invariant feature points from the first frame of the video; ③ Each frame in the video is matched with the reference image related feature points; ④ Obtain the distance between a feature point of the reference image and a matching feature point of the i-th frame image as , let the frame rate of the video be , then the velocity of feature point movement is , and then set a rate threshold T, if , remove the feature point, otherwise keep the feature point; ⑤Motion compensation for the shaken image: through the feature point coordinates of the first frame in the obtained video The coordinates of the feature points matching the jth frame , you can get the image offset of the jth frame ,but , and satisfy: The jth frame picture by panning Achieving dithered frames motion compensation to obtain a stabilized image; ⑥Save the motion-compensated image of the jth frame, and do the same processing on other frames until the end of the video. 3. The high-voltage transmission line anti-breaking alarm system suitable for jittering environments according to claim 1 or 2, characterized in that: the infrared monitoring camera is equipped with a pan-tilt control system and has a maximum monitoring distance of 100m Ball machine. 4. according to any one of claims 1 to 3, the high-voltage transmission line anti-breaking alarm system suitable for jittering environment is characterized in that: the embedded image processing board adopts a quad-core multiprocessor chip based on ARM9 image processing board.