Lightning monitoring and shooting method and device

Abstract

The invention provides a lightning monitoring method and device, and the method comprises the steps: integrating an electromagnetic sensor, a thunder detection device and a camera, and monitoring the electromagnetic, acoustic and optical signals of lightning in real time. When any signal is triggered, the camera executes video backtracking: if the three signals respond, backtracking is carried out by taking the first signal as a reference; if the two responses, the video is traced back and verified; and backtracking and verifying according to a preset time length when the single sensor is triggered. The confirmed lightning video is output and saved. According to the technology, multiple monitoring sources are fused, and the accuracy and efficiency of lightning detection are remarkably improved through cooperation of sensors.

Description

Technical Field

[0001] The present application relates to the field of lightning monitoring, and in particular to a lightning monitoring method and device. Background Art

[0002] Lightning strikes are a strong electromagnetic pulse phenomenon in nature, which has significant negative impacts on many fields (such as meteorology, transportation, electricity, and communications). In the operation of power grids, lightning strikes are one of the main causes of transmission line tripping, especially for high-voltage lines. The tripping of these lines may trigger a chain reaction, expand the scope of accidents, and seriously threaten the safety of the power grid.

[0003] Lightning monitoring and synchronous early warning are the cornerstones of lightning protection work, providing key support for power grid lightning damage prevention, detailed fault analysis, and differentiated lightning protection assessment and transformation.

[0004] Significance: It is of great significance to ensure the safe and stable operation of important transmission lines.

[0005] At present, lightning monitoring technology is aimed at comprehensive monitoring of physical information of multiple processes of lightning strikes, including electromagnetic signal detection, optical image monitoring, and pre-detection of atmospheric electric fields, to improve monitoring accuracy and effectiveness.

[0006] Although monitoring methods are abundant and their accuracy has been improved, the synchronous observation of the complete lightning strike process is still imperfect, and it is impossible to effectively monitor the complete lightning strike situation and lightning strike development path in the transmission line corridor, which affects the subsequent fault analysis and the formulation of lightning protection transformation measures. Summary of the invention

[0007] The purpose of this application is to overcome the above-mentioned existing technologies and provide a method, device, equipment and storage medium for evaluating the adaptability of power system technical standards.

[0008] The present application provides a lightning monitoring method, comprising:

[0009] The electromagnetic, acoustic and optical signals when lightning occurs are monitored in real time by electromagnetic sensors, thunder detection devices and cameras;

[0010] generating a trigger signal according to at least one of the electromagnetic, acoustic and optical signals;

[0011] The camera performs video retracing according to the trigger signal, including: if the electromagnetic sensor, the thunder detection device and the camera all generate trigger signals, the video retracing is performed with the time when the trigger signal is initially generated as a mark point; if any two of the electromagnetic sensor, the thunder detection device and the camera generate trigger signals, the video retracing is performed with the time when the trigger signal is initially generated as a mark point, and it is identified whether the retraced video is a lightning video; if any one of the electromagnetic sensor, the thunder detection device and the camera generates a trigger signal, the video retracing is performed according to the retracing time pre-set for the electromagnetic sensor, the thunder detection device or the camera, and it is identified whether the retraced video is a lightning video;

[0012] If the replayed video is a lightning video, the lightning video will be output and saved to complete the lightning shooting.

[0013] Optionally, generating a trigger signal according to at least one of the electromagnetic, acoustic and optical signals comprises:

[0014] Set the average / minimum light intensity signal generated when lightning occurs as the monitoring light intensity threshold;

[0015] The camera captures abnormal flash signals within the monitoring range in real time, and generates the trigger signal if the abnormal flash signal is greater than the monitoring light intensity threshold;

[0016] Wherein, the camera includes: a high-speed optical camera.

[0017] Optionally, the thunder detection device is an acoustic sensor, including a multi-channel thunder sensor array.

[0018] Optionally, if the trigger signal is generated only according to the thunder detection device, the backtracking time length is the preset backtracking time length plus 5 to 7 seconds.

[0019] Optionally, the electromagnetic frequency is below 300 khz.

[0020] The present application also provides a lightning monitoring device, comprising:

[0021] The detection module monitors the electromagnetic, acoustic and optical signals of lightning in real time through electromagnetic sensors, thunder detection devices and cameras;

[0022] A signal module, generating a trigger signal according to at least one of the electromagnetic, acoustic and optical signals;

[0023] The execution module, the camera performs video replay according to the trigger signal, including: if the electromagnetic sensor, the thunder detection device and the camera all generate trigger signals, the video replay is performed with the time when the trigger signal is initially generated as a mark point; if any two sensors among the electromagnetic sensor, the thunder detection device and the camera are in action, the video replay is performed with the time when the trigger signal is initially generated as a mark point, and it is identified whether the replayed video is a lightning video; if any one of the electromagnetic sensor, the thunder detection device and the camera generates a trigger signal, the video replay is performed according to the replay time pre-set for the electromagnetic sensor, the thunder detection device or the camera, and it is identified whether the replayed video is a lightning video;

[0024] The storage module outputs and saves the lightning video if the retraced video is a lightning video, thereby completing the lightning shooting.

[0025] Optionally, the execution module generates a trigger signal according to at least one of the electromagnetic, acoustic and optical signals, including:

[0026] Set the average / minimum light intensity signal generated when lightning occurs as the monitoring light intensity threshold;

[0027] The camera captures abnormal flash signals within the monitoring range in real time, and generates the trigger signal if the abnormal flash signal is greater than the monitoring light intensity threshold;

[0028] Wherein, the camera includes: a high-speed optical camera

[0029] Optionally, the thunder detection device is an acoustic sensor, including a multi-channel thunder sensor array.

[0030] Optionally, in the execution module, if the trigger signal is generated only according to the thunder detection device, the backtracking time length is the preset backtracking time length plus 5 to 7 seconds.

[0031] Optionally, the electromagnetic frequency is below 300 khz.

[0032] The beneficial effects of this application are:

[0033] The present application provides a method for monitoring lightning, comprising: respectively monitoring electromagnetic, acoustic and optical signals when lightning occurs in real time by means of an electromagnetic sensor, a thunder detection device and a camera; generating a trigger signal according to at least one of the electromagnetic, acoustic and optical signals; the camera performing video backtracking according to the trigger signal, comprising: if the electromagnetic sensor, the thunder detection device and the camera all generate trigger signals, performing video backtracking with the time when the trigger signal is initially generated as a mark point; if any two of the electromagnetic sensor, the thunder detection device and the camera are in action, performing video backtracking with the time when the trigger signal is initially generated as a mark point, and identifying whether the backtracked video is a lightning video; if any one of the electromagnetic sensor, the thunder detection device and the camera generates a trigger signal, performing video backtracking according to the backtracking time pre-set for the electromagnetic sensor, the thunder detection device or the camera, and identifying whether the backtracked video is a lightning video; if the backtracked video is a lightning video, outputting and saving the lightning video to complete lightning shooting. This application uses multiple monitoring channels, including thunder, lightning light intensity and electromagnetic wave signals, and effectively improves the accuracy of lightning detection through the collaborative work of multiple sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the lightning monitoring process in this application;

[0035] Figure 2 This is a schematic diagram of the three-level response of the video backtracking monitoring function in this application;

[0036] Figure 3 This is a schematic diagram of the lightning monitoring device in this application. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that various forms of implementing the present disclosure should not be limited by the embodiments set forth herein. On the contrary, the embodiments are provided to more thoroughly understand the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] Please refer to Figure 1 As shown, the present application provides a lightning monitoring method, the steps of which include:

[0039] S101, using electromagnetic sensors (electrical detection probes and electromagnetic field antennas), thunder detection devices and cameras to monitor electromagnetic, acoustic and optical signals when lightning occurs in real time.

[0040] By integrating multiple sensors such as lightning detection probes, electromagnetic field antennas, thunder detection devices and cameras, real-time monitoring of electromagnetic, acoustic and optical signals when lightning occurs can be achieved.

[0041] The electromagnetic field antenna is connected to the lightning detection probe on the side and connected to the lightning signal wave identification device at the bottom.

[0042] Lightning detection probe: responsible for monitoring the changes in the electromagnetic field generated by lightning discharge.

[0043] Electromagnetic field antenna: receives low-frequency electromagnetic wave signals generated by lightning.

[0044] Thunder detection device: It is composed of acoustic sensors that capture the sound wave signals generated by lightning, and the monitoring frequency is set between 25Hz and 1000Hz.

[0045] Camera: Use an optical high-speed monitoring camera with a light intensity sensor to monitor the dramatic changes in light intensity caused by lightning in real time and capture abnormal flash signals.

[0046] It comprehensively captures information on lightning activities from three dimensions: electromagnetic, acoustic and optical, providing accurate data support for subsequent video tracing.

[0047] S102: Generate a trigger signal according to at least one of the electromagnetic, acoustic and optical signals.

[0048] If at least one sensor among the lightning detection probe, the electromagnetic field antenna, the thunder detection device or the camera detects a lightning signal, the system generates a trigger signal.

[0049] For example, lightning detection probes: This type of sensor usually predicts lightning by detecting changes in static or electric fields in the atmosphere. A threshold value for the rate of change of the electric field can be set. If the detected rate of change of the electric field exceeds this threshold value, it is considered that lightning activity is about to occur, thereby generating a trigger signal. Electromagnetic field antenna: The electromagnetic field antenna can capture electromagnetic radiation generated by lightning (the frequency of the electromagnetic is below 300khz). The system can preset an electromagnetic radiation intensity threshold. If the electromagnetic radiation intensity received by the antenna exceeds this threshold, it indicates that lightning activity is ongoing, and a trigger signal is immediately generated. Thunder detection devices, including multi-channel thunder sensor arrays: This type of device uses microphones or acoustic sensors to capture thunder. A threshold value for sound intensity or frequency can be set. If the detected thunder signal reaches or exceeds these thresholds, it indicates that lightning has occurred, and the system immediately sends a trigger signal. Camera: The average / minimum light intensity signal generated when lightning occurs is set as the monitoring light intensity threshold; the camera captures abnormal flash signals within the monitoring range in real time, and generates the trigger signal if the abnormal flash signal is greater than the monitoring light intensity threshold.

[0050] After receiving the trigger signal, the signal processing and control module is ready to start the video retracing process. Through the collaborative work of multiple sensors, the sensitivity and accuracy of lightning detection are improved to ensure timely response when lightning occurs.

[0051] S103: The camera performs video retracing according to the trigger signal.

[0052] The camera performs video replay based on the generated trigger signal. The replay initiation method and replay duration depend on the response of different sensors.

[0053] Please refer to Figure 2 As shown, the video retracing function is a three-level response mode.

[0054] S201: If the electromagnetic sensor, the thunder detection device, and the camera all generate trigger signals, perform video retracing with the time when the trigger signal is initially generated as a mark point.

[0055] If the lightning detection probe, electromagnetic field antenna, thunder detection device and camera are all in action, the system will perform video backtracking with the initial time of receiving the electromagnetic, sound and light signals as the mark point.

[0056] Starting from the backtracking point and rolling forward, it covers the entire stage from the occurrence, development to the end of lightning.

[0057] When multiple sensors confirm the occurrence of lightning, ensure the comprehensiveness and accuracy of the retrospective video.

[0058] S202: If any two sensors among the electromagnetic sensor, the thunder detection device and the camera are in action, video retracing is performed with the time when the trigger signal is initially generated as a mark point, and it is identified whether the retraced video is a thunder video.

[0059] If any two sensors among the electromagnetic sensor, thunder detection device and camera are in action, the system will also perform video replay with the initial time of receiving the signal as the mark point, and start the image intelligent recognition module to perform intelligent recognition on the replayed video.

[0060] Starting from the backtracking point and rolling forward, it covers the entire stage from the occurrence, development to the end of lightning.

[0061] The image intelligent recognition module is used to compare and analyze the retrospective video to determine whether it is a lightning video.

[0062] When some sensors confirm that lightning has occurred, the accuracy and reliability of video retracing are improved through intelligent recognition functions.

[0063] S203: If any one of the electromagnetic sensor, the thunder detection device and the camera generates a trigger signal, perform video backtracking according to the backtracking time pre-set for the electromagnetic sensor, the thunder detection device or the camera, and identify whether the backtracked video is a lightning video.

[0064] If any sensor is a thunder detection device, the lookback time is the preset lookback time plus 5 to 7 seconds.

[0065] The image intelligent recognition module compares and analyzes the retracing video to determine whether it is a lightning video. When a single sensor confirms the occurrence of lightning, the preset retracing time and intelligent recognition function can minimize false triggering and missed shots.

[0066] Start the image intelligent recognition module to perform intelligent recognition on the retrospective video to determine whether it is a lightning video. The steps are as follows:

[0067] The retrospective video is divided into continuous image frames. The image frames are processed by denoising, brightness adjustment, contrast enhancement, etc. to improve the image quality and facilitate subsequent feature extraction.

[0068] Deep learning models (such as CNN) are used to extract key features from the preprocessed image frames. These features include the shape, edges, texture, and color distribution of lightning.

[0069] The extracted features are input into the trained classifier, and the classifier determines whether the previous frame contains lightning phenomena based on the features. The classifier uses a variety of machine learning algorithms, such as support vector machine (SVM), decision tree or ensemble learning methods.

[0070] According to the output of the classifier, it is determined whether the retrospective video is a lightning video. If the video contains multiple frames of lightning phenomena, or the lightning phenomenon lasts for a certain period of time, the video can be considered a lightning video.

[0071] The video retracing function ensures that the complete process before and after the lightning occurs can be captured, providing detailed information for subsequent lightning analysis.

[0072] S104: If the replayed video is a lightning video, the lightning video is output and saved to complete the lightning shooting.

[0073] The retrospective video identified as a lightning video is output and saved to the storage unit module. The storage method uses a combination of built-in memory card and cloud storage to ensure the security and accessibility of video data.

[0074] Storage method: built-in memory card and cloud storage.

[0075] Video application: Video data can be used in many fields such as lightning research, meteorological observation, disaster warning and protection.

[0076] Purpose: To provide high-quality lightning video materials for subsequent

[0077] Please refer to Figure 3As shown, the present application also provides a lightning monitoring device, which comprehensively monitors the electromagnetic, acoustic and optical signals when lightning occurs, and uses video backtracking technology to accurately capture and record the entire process of lightning occurrence, providing intuitive and effective data support for subsequent lightning protection, fault analysis and lightning protection transformation.

[0078] The lightning monitoring device comprises:

[0079] Detection module 201: This module integrates a lightning detection probe, an electromagnetic field antenna, a thunder detection device and a high-definition camera.

[0080] Electromagnetic sensors, thunder detection devices and cameras are used to monitor electromagnetic, acoustic and optical signals when lightning occurs in real time. The lightning detection probe captures the electromagnetic pulse signal generated by lightning; the electromagnetic field antenna monitors the changes in the electromagnetic field in space caused by lightning; the thunder detection device records the sound signal generated by lightning; and the camera is responsible for capturing the optical image when lightning occurs.

[0081] All equipment is under real-time monitoring to ensure that lightning events can be responded to immediately.

[0082] Signal module 202: If any sensor in the detection module (lightning detection probe, electromagnetic field antenna, thunder detection device or camera) detects electromagnetic, acoustic or optical signals related to lightning, the signal module will immediately generate a trigger signal.

[0083] The generation of the trigger signal is based on the detection of at least one signal, ensuring the sensitivity and response speed of the device to lightning events.

[0084] Execution module 203: If the electromagnetic sensor, the thunder detection device and the camera all generate trigger signals, video retracing is performed with the time when the trigger signal is initially generated as a mark point.

[0085] If any two sensors among the electromagnetic sensor, the thunder detection device and the camera are in action, video retracing is performed with the time when the trigger signal is initially generated as a mark point, and it is identified whether the retraced video is a thunder video.

[0086] If any one of the electromagnetic sensor, thunder detection device and camera generates a trigger signal, video replay is performed according to the replay time pre-set for the electromagnetic sensor, thunder detection device or camera, and it is identified whether the replayed video is a lightning video.

[0087] The design of the actuator module ensures flexibility and accuracy under different sensor configurations and response conditions.

[0088] Storage module 204: If the replayed video is a lightning video, the lightning video is output and saved to complete the lightning shooting.

[0089] The saved lightning video data is of great value for subsequent lightning protection research, power grid fault analysis, and the formulation of differentiated lightning protection transformation plans.

[0090] Furthermore, the lightning monitoring device also includes a box for centrally installing the above modules. A solar panel is fixed to the outside of the box through a metal bracket, and a battery pack is installed at the bottom of the box to form a power supply system to supply power to the lightning monitoring device. Furthermore, a multi-point mesh slot is set on the inner wall of the box, and a desiccant can be filled in the slot.

[0091] This device and solution can be widely used in key areas susceptible to lightning, such as electricity, communications, and transportation, to provide strong support for improving lightning protection capabilities and ensuring the safe and stable operation of infrastructure. At the same time, with the continuous advancement of technology and in-depth application, this device and solution is expected to play a more important role in the future.

Claims

1. A lightning monitoring method, characterized in that: include: The electromagnetic, acoustic and optical signals when lightning occurs are monitored in real time by electromagnetic sensors, thunder detection devices and cameras; generating a trigger signal according to at least one of the electromagnetic, acoustic and optical signals; The camera performs video retracing according to the trigger signal, including: if the electromagnetic sensor, the thunder detection device and the camera all generate trigger signals, the video retracing is performed with the time when the trigger signal is initially generated as a mark point; if any two of the electromagnetic sensor, the thunder detection device and the camera generate trigger signals, the video retracing is performed with the time when the trigger signal is initially generated as a mark point, and it is identified whether the retraced video is a lightning video; if any one of the electromagnetic sensor, the thunder detection device and the camera generates a trigger signal, the video retracing is performed according to the retracing time pre-set for the electromagnetic sensor, the thunder detection device or the camera, and it is identified whether the retraced video is a lightning video; If the replayed video is a lightning video, the lightning video will be output and saved to complete the lightning shooting.

2. The lightning monitoring method according to claim 1, characterized in that: The step of generating a trigger signal according to at least one of the electromagnetic, acoustic and optical signals comprises: Set the average / minimum light intensity signal generated when lightning occurs as the monitoring light intensity threshold; The camera captures abnormal flash signals within the monitoring range in real time, and generates the trigger signal if the abnormal flash signal is greater than the monitoring light intensity threshold; Wherein, the camera includes: a high-speed optical camera.

3. The lightning monitoring method according to claim 1, characterized in that: The thunder detection device is an acoustic sensor, including a multi-channel thunder sensor array.

4. The lightning monitoring method according to claim 1, characterized in that: If the trigger signal is generated only according to the thunder detection device, the lookback time is the preset lookback time plus 5 to 7 seconds.

5. The lightning monitoring method according to claim 1, characterized in that: The electromagnetic frequency is below 300 khz.

6. A lightning monitoring device, characterized in that: include: The detection module monitors the electromagnetic, acoustic and optical signals of lightning in real time through electromagnetic sensors, thunder detection devices and cameras; A signal module, generating a trigger signal according to at least one of the electromagnetic, acoustic and optical signals; The execution module, the camera performs video replay according to the trigger signal, including: if the electromagnetic sensor, the thunder detection device and the camera all generate trigger signals, the video replay is performed with the time when the trigger signal is initially generated as a mark point; if any two sensors among the electromagnetic sensor, the thunder detection device and the camera are in action, the video replay is performed with the time when the trigger signal is initially generated as a mark point, and it is identified whether the replayed video is a lightning video; if any one of the electromagnetic sensor, the thunder detection device and the camera generates a trigger signal, the video replay is performed according to the replay time pre-set for the electromagnetic sensor, the thunder detection device or the camera, and it is identified whether the replayed video is a lightning video; The storage module outputs and saves the lightning video if the retraced video is a lightning video, thereby completing the lightning shooting.

7. The lightning monitoring device according to claim 6, characterized in that: The execution module generates a trigger signal according to at least one of the electromagnetic, acoustic and optical signals, including: Set the average / minimum light intensity signal generated when lightning occurs as the monitoring light intensity threshold; The camera captures abnormal flash signals within the monitoring range in real time, and generates the trigger signal if the abnormal flash signal is greater than the monitoring light intensity threshold; Wherein, the camera includes: a high-speed optical camera.

8. The lightning monitoring device according to claim 6, characterized in that: The thunder detection device is an acoustic sensor, including a multi-channel thunder sensor array.

9. The lightning monitoring device according to claim 6, characterized in that: In the execution module, if the trigger signal is generated only according to the thunder detection device, the backtracking time length is the preset backtracking time length plus 5 to 7 seconds.

10. The lightning monitoring device according to claim 6, characterized in that: The electromagnetic frequency is below 300 khz.

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