Lightning trigger high-speed image acquisition device method and system, terminal equipment and computer readable storage medium

Abstract

The invention discloses a lightning-triggered high-speed image acquisition device, method and system, terminal equipment and a computer readable storage medium. The method comprises the following steps: acquiring a secondary side voltage signal of a mutual inductor of a transformer substation; judging whether the voltage variation of the secondary side voltage signal of the mutual inductor in the preset time period exceeds a preset trigger threshold value or not; if yes, a high-speed image acquisition device trigger signal is sent out, so that the high-speed image acquisition device starts image acquisition after receiving the trigger signal; and if not, continuing to detect the secondary side voltage signal of the transformer of the transformer substation. According to the invention, the influence of the surrounding environment can be reduced, the triggering accuracy of the lightning triggering high-speed acquisition device is improved, and the lightning discharge process is comprehensively captured.

Description

Technical Field

[0001] The present invention relates to the field of observation of lightning discharge processes, and in particular to a lightning-triggered high-speed image acquisition device method, system, terminal equipment and computer-readable storage medium. Background Art

[0002] Lightning causes damage to power grids and buildings, and lightning protection is an important research topic in power grids. In order to study the formation mechanism of lightning channels, it is necessary to observe the lightning discharge process. For example, high-speed cameras are used to observe this process to clarify the entire process of linear lightning between clouds and the ground, starting from the edge of the thundercloud to the ground, advancing step by step, until it finally connects with the oncoming lightning, providing a basis for related lightning protection work.

[0003] At present, due to the randomness of the lightning process, it is difficult to trigger the high-speed camera in advance. Therefore, the high-speed camera must be triggered by the signal during the lightning discharge process. Commonly used triggering methods include optical triggering and electromagnetic field sensor triggering. However, these triggering methods are often affected by the surrounding environment, resulting in insensitive triggering. In addition, the response characteristics of the electromagnetic field sensor itself may make it difficult for small currents to trigger the camera, resulting in unsatisfactory actual triggering and difficulty in fully capturing the lightning discharge process. Summary of the invention

[0004] The embodiments of the present invention provide a lightning-triggered high-speed image acquisition device method, system, terminal equipment and computer-readable storage medium, which can reduce the influence of the surrounding environment, improve the triggering accuracy of the lightning-triggered high-speed acquisition device, and comprehensively capture the lightning discharge process.

[0005] An embodiment of the present invention provides a lightning-triggered high-speed image acquisition device method, comprising:

[0006] Obtain the secondary side voltage signal of the transformer in the substation;

[0007] Determine whether the voltage change of the secondary side voltage signal of the transformer within a preset time period exceeds a preset trigger threshold;

[0008] If yes, a trigger signal for the high-speed image acquisition device is sent, so that the high-speed image acquisition device starts to acquire images after receiving the trigger signal;

[0009] If not, continue to detect the secondary side voltage signal of the transformer of the substation.

[0010] Furthermore, after the high-speed image acquisition device trigger signal is issued, the method further includes:

[0011] Continue to detect the voltage signal on the secondary side of the transformer of the substation, and start timing when it is detected that the voltage change is less than the preset trigger threshold;

[0012] After the timing duration exceeds the preset duration, a stop signal of the high-speed image acquisition device is sent.

[0013] Furthermore, after obtaining the secondary side voltage signal of the transformer of the substation, it also includes:

[0014] The collected transformer secondary side voltage signal of the substation is displayed as a waveform through the functions and interface provided by the test equipment.

[0015] Furthermore, after the high-speed image acquisition device trigger signal is issued, the method further includes:

[0016] A storage signal is sent to the high-speed image acquisition device to enable the high-speed image acquisition device to store the acquired image.

[0017] Based on the above method embodiment, the present invention provides a corresponding system embodiment, including: a voltage signal acquisition module, a voltage change determination module, a trigger signal issuing module, and a continuous detection module;

[0018] A voltage signal acquisition module is used to acquire the secondary side voltage signal of the transformer of the substation;

[0019] A voltage variation determination module is used to determine whether the voltage variation of the transformer secondary side voltage signal within a preset time period exceeds a preset trigger threshold;

[0020] A trigger signal sending module, used for sending a trigger signal to the high-speed image acquisition device, so that the high-speed image acquisition device starts to acquire images after receiving the trigger signal;

[0021] The continuous detection module is used to continue to detect the secondary side voltage signal of the transformer of the substation.

[0022] Furthermore, the lightning-triggered high-speed image acquisition device system further includes: a stop signal issuing module;

[0023] The stop signal issuing module comprises: a timing unit and a stop signal issuing unit;

[0024] A timing unit is used to continue to detect the voltage signal on the secondary side of the transformer of the substation, and start timing when it is detected that the voltage change is less than a preset trigger threshold;

[0025] The stop signal issuing unit is used to issue a stop signal for the high-speed image acquisition device after the timing duration exceeds a preset duration.

[0026] Furthermore, the lightning-triggered high-speed image acquisition device system further includes: a waveform display module;

[0027] The waveform display module is used to display the collected transformer secondary side voltage signal of the substation in waveform through the functions and interface provided by the test equipment.

[0028] Furthermore, the lightning-triggered high-speed image acquisition device system further includes: a storage signal sending module;

[0029] The storage signal sending module is used to send a storage signal to the high-speed image acquisition device so that the high-speed image acquisition device can store the acquired images.

[0030] Based on the above-mentioned method embodiment, the present invention provides a corresponding terminal device embodiment, including: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the steps of the lightning-triggered high-speed image acquisition device method as described in the present invention are implemented.

[0031] Based on the above method embodiment, the present invention provides a corresponding computer-readable storage medium embodiment, including: a stored computer program, which controls the device where the computer-readable storage medium is located to execute the steps of the lightning-triggered high-speed image acquisition device method as described in the present invention when the computer program is running.

[0032] Compared with the prior art, the beneficial effects of the embodiment of this solution are:

[0033] The present invention determines whether the voltage change of the secondary side voltage signal of the transformer of the substation exceeds the preset trigger threshold within a preset time period. If the voltage change exceeds the preset trigger threshold, a trigger signal of the high-speed image acquisition device is issued, so that the high-speed image acquisition device starts to acquire images after receiving the trigger signal; if the voltage change does not exceed the preset trigger threshold, the secondary side voltage signal of the transformer of the substation continues to be detected. Since lightning can cause the voltage to rise rapidly and generate a pulse voltage, the probability of false triggering in the surrounding environment is greatly reduced, avoiding the problem that the traditional optical triggering and electromagnetic field sensor triggering are easily affected by the surrounding environment and causing insensitive triggering, thereby achieving complete measurement of the entire lightning discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flow chart of a lightning-triggered high-speed image acquisition device method provided by an embodiment of the present invention;

[0035] Figure 2 This is a waveform display diagram of a secondary side voltage signal of a transformer of a substation after a lightning strike provided by an embodiment of the present invention;

[0036] Figure 3 The image of the Guangzhou Tower lightning arrester captured by the high-speed image acquisition device provided by an embodiment of the present invention;

[0037] Figure 4 It is a structural flow chart of a lightning-triggered high-speed image acquisition device system provided by an embodiment of the present invention;

[0038] Figure 5 It is a structural flow chart of another lightning-triggered high-speed image acquisition device system provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1:

[0041] like Figure 1 As shown, an embodiment of the present invention provides a lightning-triggered high-speed image acquisition device method, the method at least comprising the following steps:

[0042] Step S1: obtaining a transformer secondary side voltage signal of a substation;

[0043] Regarding step S1: in the present invention, a voltage monitoring device such as a voltage transformer (VT) or a digital voltage monitoring device (Digital Voltage Monitoring Device) is used to obtain a voltage signal on the secondary side circuit of the busbar transformer of the substation.

[0044] In traditional methods, in order to monitor the lightning strikes on each outgoing line, it is usually necessary to install a traveling wave current sensor or an electromagnetic field sensor on each outgoing line. This method is not only costly, but also requires a large amount of sensor equipment and wiring work, which increases the complexity and maintenance cost of the system. In contrast, the method of using the voltage change on the secondary side of the transformer as a trigger condition is more economical, and only one device can be used to monitor the lightning strikes on all outgoing lines of the busbar. The transformer is usually installed on the busbar of the substation. Monitoring the voltage change on its secondary side can directly obtain information related to all outgoing lines without the need to install additional sensors.

[0045] In addition, the method of using the voltage change on the secondary side of the transformer as the trigger condition can also avoid the problem that the electromagnetic field of a small lightning current is difficult to measure. For a small lightning current, the electromagnetic field it generates may be difficult to be accurately measured by the electromagnetic field sensor, resulting in the inability of the small current to trigger the monitoring system; while the voltage change on the secondary side of the transformer is directly related to the lightning discharge process, which can more reliably trigger the monitoring system and ensure the effective monitoring of all lightning discharge events.

[0046] In a preferred embodiment, after obtaining the secondary side voltage signal of the transformer of the substation, the method further includes:

[0047] The collected transformer secondary side voltage signal of the substation is displayed as a waveform through the functions and interface provided by the test equipment.

[0048] In one embodiment of the present invention, the transformer secondary side voltage signal of the substation obtained in step S1 can be displayed through a graphic display equipped in an oscilloscope digital voltage monitoring device, such as a liquid crystal display or a touch screen, to display the change and waveform of the transformer secondary side voltage signal of the substation, so that the substation staff can intuitively observe and analyze the change of the waveform.

[0049] It should be noted that if Figure 2 The figure shows the waveform display of the transformer secondary voltage signal of the substation after the lightning occurs. When lightning occurs, the transient current generated by lightning will cause a sudden change in voltage in the power grid. Therefore, the transformer secondary voltage of the substation will be affected by the lightning intrusion wave, causing the transformer secondary side to generate lightning pulse voltage, causing a unipolar impact on the transformer secondary voltage, causing the voltage to rise rapidly, and then gradually recover to normal levels after the oscillation attenuation process.

[0050] Step S2: determining whether the voltage variation of the voltage signal at the secondary side of the transformer within a preset time period exceeds a preset trigger threshold;

[0051] In one embodiment of the present invention, the transformer secondary side voltage signal of the substation obtained in step S1 is processed, and the voltage change within a preset time period is calculated. In this embodiment, the voltage difference before and after 0.1us is calculated to obtain the voltage change. Subsequently, it is determined whether the voltage change within 0.1us exceeds the preset trigger threshold. In this embodiment, the preset trigger threshold is set to 5V. If the calculated voltage change exceeds the preset trigger threshold, the subsequent operation is triggered.

[0052] It should be noted that the preset time period and the preset trigger threshold can be adjusted according to the needs of specific substations in different places to balance the sensitivity and the probability of false triggering. A lower threshold will increase the sensitivity of the trigger, but may increase the risk of false triggering; a higher threshold will reduce the risk of false triggering, but the corresponding trigger sensitivity may be lower. Therefore, reasonable adjustments need to be made according to actual conditions.

[0053] Step S3: If yes, a trigger signal for the high-speed image acquisition device is sent, so that the high-speed image acquisition device starts to acquire images after receiving the trigger signal;

[0054] In a preferred embodiment, after the high-speed image acquisition device trigger signal is issued, the method further includes:

[0055] Continue to detect the voltage signal on the secondary side of the transformer of the substation, and start timing when it is detected that the voltage change is less than the preset trigger threshold;

[0056] After the timing duration exceeds the preset duration, a stop signal of the high-speed image acquisition device is sent.

[0057] In one embodiment of the present invention, after judging in step S2, if the voltage variation in the preset time period exceeds the preset trigger threshold, a trigger signal of the high-speed image acquisition device is generated, and then the trigger signal is transmitted to the high-speed image acquisition device through a cable or other communication method. After receiving the trigger signal, the high-speed image acquisition device starts to acquire images. In this embodiment, the high-speed image acquisition device is a camera, that is, after receiving the trigger signal, the camera is turned on to capture images of the lightning discharge process, and the following is obtained: Figure 3 The Guangzhou Tower lightning protection image was captured by the high-speed image acquisition device shown.

[0058] After the high-speed image acquisition device trigger signal is issued, the transformer secondary side voltage signal of the substation continues to be obtained and the transformer secondary side voltage signal of the substation is detected. When it is detected that the voltage change within the preset time period is less than the preset trigger threshold, the timer starts timing and records the timing duration; then, it is detected whether the timing duration exceeds the preset duration. In this embodiment, the preset duration is 10ms, which can be set according to actual needs; when the timing duration exceeds the preset duration, a high-speed image acquisition device stop signal is generated, and then the stop signal is transmitted to the high-speed image acquisition device via a cable or other communication method. After receiving the stop signal, the high-speed image acquisition device stops image acquisition. In this embodiment, stopping image acquisition is manifested by turning off the camera.

[0059] After sending out the trigger signal of the high-speed image acquisition device, the detection continues until the voltage oscillation on the secondary side of the transformer decays below the preset trigger threshold value, and after a period of time, a stop shooting signal is sent out. The duration enables the camera to trigger and capture the main discharge and subsequent discharge processes in time, thereby achieving a complete measurement of the entire lightning discharge process. In addition, by sending out the stop shooting signal, the high-speed image acquisition device can stop image acquisition in time after the lightning discharge event ends, so as to avoid continuing to collect images after the lightning discharge process ends, obtaining invalid images occupying storage space, and improving the efficiency of processing and analyzing valid image data.

[0060] It should be noted that if the threshold value is exceeded again during the timing process, it means that a new lightning discharge event has occurred, and it is necessary to return to step S2 to re-perform judgment, detection and timing. Only when the timing duration reaches the preset duration, the high-speed image acquisition device will acquire the image.

[0061] In a preferred embodiment, after the high-speed image acquisition device trigger signal is issued, the method further includes:

[0062] A storage signal is sent to the high-speed image acquisition device to enable the high-speed image acquisition device to store the acquired image.

[0063] In one embodiment of the present invention, after the high-speed image acquisition device trigger signal is issued, a high-speed image acquisition device storage signal is also issued, so that the high-speed image acquisition device saves the acquired image in a corresponding storage medium for subsequent processing and analysis.

[0064] Step S4: If not, continue to detect the secondary side voltage signal of the transformer of the substation.

[0065] In one embodiment of the present invention, after step S2, if the voltage change in the preset time period does not exceed the preset trigger threshold, the transformer secondary side voltage signal of the substation continues to be obtained and the transformer secondary side voltage signal of the substation is detected.

[0066] Embodiment 2:

[0067] By obtaining the secondary side voltage signal of the transformer of the substation;

[0068] Determine whether the voltage change of the secondary side voltage signal of the transformer within a preset time period exceeds a preset trigger threshold;

[0069] If the voltage variation within the preset time period exceeds the preset trigger threshold, a trigger signal of the high-speed image acquisition device is generated. In this embodiment, the high-speed image acquisition device is a camera. After receiving the trigger signal, the camera is turned on to record the lightning discharge process.

[0070] After sending a trigger signal of the high-speed image acquisition device, the detection continues until the voltage oscillation on the secondary side of the transformer decays below the preset trigger threshold, and after a period of time, a signal to stop video recording is sent;

[0071] After sending out the high-speed image acquisition device trigger signal, a high-speed image acquisition device storage signal is also sent out, so that the high-speed image acquisition device stores the collected video data in a corresponding storage medium.

[0072] like Figure 4 As shown, based on the above method embodiment, a corresponding system embodiment is provided;

[0073] An embodiment of the present invention provides a lightning-triggered high-speed image acquisition device system, comprising: a voltage signal acquisition module, a voltage change determination module, a trigger signal issuing module, and a continuous detection module;

[0074] A voltage signal acquisition module is used to acquire the secondary side voltage signal of the transformer of the substation;

[0075] A voltage variation determination module is used to determine whether the voltage variation of the transformer secondary side voltage signal within a preset time period exceeds a preset trigger threshold;

[0076] A trigger signal sending module, used for sending a trigger signal to the high-speed image acquisition device, so that the high-speed image acquisition device starts to acquire images after receiving the trigger signal;

[0077] The continuous detection module is used to continue to detect the secondary side voltage signal of the transformer of the substation.

[0078] like Figure 5 As shown, an embodiment of the present invention provides another lightning-triggered high-speed image acquisition device system;

[0079] In a preferred embodiment, the lightning-triggered high-speed image acquisition device system further includes: a stop signal issuing module;

[0080] The stop signal issuing module comprises: a timing unit and a stop signal issuing unit;

[0081] A timing unit is used to continue to detect the voltage signal on the secondary side of the transformer of the substation, and start timing when it is detected that the voltage change is less than a preset trigger threshold;

[0082] The stop signal issuing unit is used to issue a stop signal for the high-speed image acquisition device after the timing duration exceeds a preset duration.

[0083] In a preferred embodiment, the lightning-triggered high-speed image acquisition device system further includes: a waveform display module;

[0084] The waveform display module is used to display the collected transformer secondary side voltage signal of the substation in waveform through the functions and interface provided by the test equipment.

[0085] In a preferred embodiment, the lightning-triggered high-speed image acquisition device system further includes: a storage signal sending module;

[0086] The storage signal sending module is used to send a storage signal to the high-speed image acquisition device so that the high-speed image acquisition device can store the acquired images.

[0087] It can be understood that the above-mentioned system item embodiment corresponds to the method item embodiment of the present invention, which can implement the lightning-triggered high-speed image acquisition device method provided by any one of the above-mentioned method item embodiments of the present invention.

[0088] It should be noted that the system embodiments described above are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, in the drawings of the system embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement the present invention without creative work.

[0089] Based on the above-mentioned embodiment of the lightning-triggered high-speed image acquisition device method, another embodiment of the present invention provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the lightning-triggered high-speed image acquisition device method of any embodiment of the present invention is implemented.

[0090] Exemplarily, in this embodiment, the computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to implement the present invention. The one or more module elements may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program in the terminal device.

[0091] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0092] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0093] Based on the above method embodiment, another embodiment is provided: another embodiment of the present invention provides a computer-readable storage medium, including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the lightning-triggered high-speed image acquisition device method described in any one of the above method embodiments of the present invention.

[0094] Wherein, the module / unit integrated in the lightning-triggered high-speed image acquisition device system / terminal device, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0095] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A lightning-triggered high-speed image acquisition device method, characterized in that: include: Obtain the secondary side voltage signal of the transformer in the substation; Determine whether the voltage change of the secondary side voltage signal of the transformer within a preset time period exceeds a preset trigger threshold; If so, a high-speed image acquisition device trigger signal is issued, so that the high-speed image acquisition device starts to acquire images after receiving the trigger signal; If not, continue to detect the secondary side voltage signal of the transformer of the substation.

2. The lightning-triggered high-speed image acquisition device method according to claim 1, characterized in that: After the trigger signal of the high-speed image acquisition device is issued, the method further includes: Continue to detect the voltage signal on the secondary side of the transformer of the substation, and start timing when it is detected that the voltage change is less than the preset trigger threshold; After the timing duration exceeds the preset duration, a stop signal of the high-speed image acquisition device is sent.

3. The lightning-triggered high-speed image acquisition device method according to claim 1, characterized in that: After obtaining the transformer secondary side voltage signal of the substation, it also includes: The collected voltage signal on the secondary side of the transformer of the substation is displayed in waveform through the functions and interface provided by the test equipment.

4. The lightning-triggered high-speed image acquisition device method according to claim 1, characterized in that: After the trigger signal of the high-speed image acquisition device is issued, the method further includes: A storage signal is sent to the high-speed image acquisition device to enable the high-speed image acquisition device to store the acquired image.

5. A lightning-triggered high-speed image acquisition device system, characterized in that: include: Voltage signal acquisition module, voltage change determination module, trigger signal sending module, continuous detection module; The voltage signal acquisition module is used to acquire the secondary side voltage signal of the transformer of the substation; The voltage variation determination module is used to determine whether the voltage variation of the transformer secondary side voltage signal within a preset time period exceeds a preset trigger threshold; The trigger signal issuing module is used to issue a trigger signal to the high-speed image acquisition device, so that the high-speed image acquisition device starts to acquire images after receiving the trigger signal; The continuous detection module is used to continue to detect the secondary side voltage signal of the transformer of the substation.

6. The lightning-triggered high-speed image acquisition device system according to claim 5, characterized in that: Also includes: Stop signal issuing module; The stop signal issuing module comprises: a timing unit and a stop signal issuing unit; The timing unit is used to continue to detect the voltage signal on the secondary side of the transformer of the substation, and start timing when it is detected that the voltage change is less than a preset trigger threshold; The stop signal issuing unit is used to issue a stop signal for the high-speed image acquisition device after the timing duration exceeds a preset duration.

7. The lightning-triggered high-speed image acquisition device system according to claim 5, characterized in that: Also includes: Waveform display module; The waveform display module is used to display the collected voltage signal on the secondary side of the transformer of the substation in waveform through the functions and interface provided by the test equipment.

8. The lightning-triggered high-speed image acquisition device system according to claim 5, characterized in that: Also includes: Storage signal sending module; The storage signal sending module is used to send a storage signal to the high-speed image acquisition device so that the high-speed image acquisition device stores the acquired images.

9. A terminal device, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the lightning-triggered high-speed image acquisition device method as described in any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium, characterized in that: include: A stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the lightning-triggered high-speed image acquisition device method as described in any one of claims 1 to 4.

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