A method, system, device, and storage medium for a lightning-triggered high-speed image acquisition device.

Abstract

This invention discloses a method, system, terminal device, and computer-readable storage medium for a lightning-triggered high-speed image acquisition device. The method includes: acquiring the secondary voltage signal of a transformer in a substation; determining whether the voltage change of the transformer secondary voltage signal within a preset time period exceeds a preset trigger threshold; if so, issuing a trigger signal for the high-speed image acquisition device, causing the high-speed image acquisition device to begin image acquisition upon receiving the trigger signal; if not, continuing to detect the transformer secondary voltage signal in the substation. By implementing this invention, the influence of the surrounding environment can be reduced, the triggering accuracy of the lightning-triggered high-speed acquisition device can be improved, and the lightning discharge process can be comprehensively captured.

Description

Technical Field

[0001] This invention relates to the field of lightning discharge process observation, and more particularly to a lightning-triggered high-speed image acquisition device, method, system, terminal equipment, and computer-readable storage medium. Background Technology

[0002] Lightning poses a threat to power grids and buildings, making lightning protection a crucial research topic for power grids. To study the formation mechanism of lightning channels, research requires observing the lightning discharge process. For example, using high-speed cameras to observe this process can clarify the entire process of linear lightning between clouds and the ground, from its initial development from the edge of the thundercloud towards the ground, its gradual progression, until it finally contacts the oncoming lightning strike. This provides a basis for related lightning protection work.

[0003] Currently, due to the randomness of lightning events, it is difficult to pre-trigger high-speed cameras. Therefore, triggering of high-speed cameras must be achieved through signals during the lightning discharge process. Common triggering methods include optical triggering and electromagnetic field sensor triggering. However, these methods are often affected by the surrounding environment, resulting in insensitive triggering. In addition, the response characteristics of electromagnetic field sensors themselves may make it difficult for small currents to trigger the camera, leading to unsatisfactory actual triggering and difficulty in fully capturing the lightning discharge process. Summary of the Invention

[0004] This invention provides 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 method for a lightning-triggered high-speed image acquisition device, comprising:

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

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

[0008] If so, a high-speed image acquisition device trigger signal is sent so that the high-speed image acquisition device can start image acquisition after receiving the trigger signal;

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

[0010] Furthermore, after issuing the trigger signal for the high-speed image acquisition device, it also includes:

[0011] Continue to monitor the voltage signal on the secondary side of the instrument transformer in the substation. When the detected voltage change is less than the preset trigger threshold, start timing.

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

[0013] Furthermore, after acquiring the secondary voltage signal of the instrument transformer in the substation, the process also includes:

[0014] The collected voltage signals from the secondary side of the transformers in the substation are displayed as waveforms using the functions and interface provided by the testing equipment.

[0015] Furthermore, after issuing the trigger signal for the high-speed image acquisition device, it also includes:

[0016] A storage signal is sent to the high-speed image acquisition device so that the high-speed image acquisition device can store the acquired images.

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

[0018] The voltage signal acquisition module is used to acquire the voltage signal on the secondary side of the instrument transformer in the substation.

[0019] The voltage change judgment module is used to determine whether the voltage change of the secondary voltage signal of the current transformer exceeds the preset trigger threshold within a preset time period.

[0020] The trigger signal sending module is used to send a trigger signal to the high-speed image acquisition device so that the high-speed image acquisition device can start image acquisition after receiving the trigger signal;

[0021] The continuous monitoring module is used to continuously monitor the voltage signal on the secondary side of the instrument transformers in the substation.

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

[0023] The stop signal transmitting module includes: a timing unit and a stop signal transmitting unit;

[0024] The timing unit is used to continue to detect the voltage signal on the secondary side of the instrument transformer in the substation. When the detected voltage change is less than the preset trigger threshold, the timing starts.

[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 the preset duration.

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

[0027] The waveform display module is used to display the acquired secondary voltage signal of the transformer in the substation as a waveform through the functions and interface provided by the testing equipment.

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

[0029] The storage signal transmitting module is used to transmit storage signals from the high-speed image acquisition device so that the high-speed image acquisition device can store the acquired images.

[0030] Based on the above method embodiments, 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, it implements the steps of the lightning-triggered high-speed image acquisition device method as described in the present invention.

[0031] Based on the above method embodiments, the present invention provides a corresponding computer-readable storage medium embodiment, including: a stored computer program that, when the computer program is running, 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.

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

[0033] This invention determines whether the voltage change of the secondary voltage signal of the instrument transformer in a substation exceeds a preset trigger threshold within a preset time period. If the voltage change exceeds the preset trigger threshold, a trigger signal is issued to the high-speed image acquisition device, so that the high-speed image acquisition device can start image acquisition after receiving the trigger signal. If the voltage change does not exceed the preset trigger threshold, the detection of the secondary voltage signal of the instrument transformer in the substation continues. Since lightning can cause the voltage to rise rapidly and generate pulse voltage, the probability of accidental triggering by the surrounding environment is greatly reduced. This avoids the problem that traditional optical triggering and electromagnetic field sensor triggering are easily affected by the surrounding environment, resulting in insensitive triggering. Thus, a complete measurement of the entire lightning discharge process is achieved. Attached Figure Description

[0034] Figure 1 This is a flowchart illustrating a lightning-triggered high-speed image acquisition method according to an embodiment of the present invention.

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

[0036] Figure 3 This is a lightning strike image of the Guangzhou Tower acquired by a high-speed image acquisition device provided in an embodiment of the present invention;

[0037] Figure 4 This is a structural flowchart of a lightning-triggered high-speed image acquisition device system provided in an embodiment of the present invention;

[0038] Figure 5 This is a structural flowchart of another lightning-triggered high-speed image acquisition device system provided in an embodiment of the present invention. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

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

[0042] Step S1: Obtain the secondary voltage signal of the instrument transformer in the substation;

[0043] For step S1: In this invention, voltage signals are acquired on the secondary side circuit of the bus transformer in the substation using voltage monitoring devices such as voltage transformers (VT) or digital voltage monitoring devices.

[0044] In traditional methods, to monitor lightning strikes on each outgoing line, traveling wave current sensors or electromagnetic field sensors are typically installed on each line. This approach is not only costly but also requires extensive sensor equipment and wiring, increasing system complexity and maintenance costs. In contrast, using changes in the secondary voltage of instrument transformers as the trigger condition is more economical, allowing for lightning strike monitoring of all outgoing lines on the busbar using only a single device. Instrument transformers are usually already installed on the substation busbar, and monitoring changes in their secondary voltage directly provides information relevant to all outgoing lines, eliminating the need for additional sensors.

[0045] Furthermore, using the change in the secondary voltage of the instrument transformer as the trigger condition can avoid the problem of difficulty in measuring the electromagnetic field of small lightning currents. For small lightning currents, the electromagnetic field they generate may be difficult to measure accurately by electromagnetic field sensors, resulting in the small current failing to trigger the monitoring system; however, the change in the secondary voltage of the instrument transformer is directly related to the lightning discharge process, which can more reliably trigger the monitoring system and ensure effective monitoring of all lightning discharge events.

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

[0047] The collected voltage signals from the secondary side of the transformers in the substation are displayed as waveforms using the functions and interface provided by the testing equipment.

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

[0049] It should be noted that, as Figure 2 The diagram shows the waveform of the secondary voltage signal of the instrument transformer in a substation after a lightning strike. When lightning occurs, the transient current generated by the lightning will cause a sudden change in voltage in the power grid. Therefore, the secondary voltage of the instrument transformer in the substation will be affected by the lightning surge wave, resulting in a lightning pulse voltage on the secondary side of the instrument transformer. This causes a unipolar impact on the secondary voltage of the instrument transformer, resulting in a rapid rise in voltage. Subsequently, after an oscillation and decay process, the voltage gradually returns to the normal level.

[0050] Step S2: Determine whether the voltage change of the secondary voltage signal of the current transformer within a preset time period exceeds a preset trigger threshold;

[0051] In one embodiment of the present invention, the voltage signal of the secondary side of the transformer in the substation obtained in step S1 is processed to calculate the voltage change within a preset time period. In this embodiment, the voltage difference before and after 0.1us is calculated to obtain the voltage change. Then, it is determined whether the voltage change within 0.1us exceeds a 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 is important to note that the preset time period and preset trigger threshold can be adjusted according to the specific needs of different substations in different locations to balance sensitivity and false trigger probability. A lower threshold will increase the trigger sensitivity, 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 the actual situation.

[0053] Step S3: If yes, then send a high-speed image acquisition device trigger signal so that the high-speed image acquisition device can start image acquisition after receiving the trigger signal;

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

[0055] Continue to monitor the voltage signal on the secondary side of the instrument transformer in the substation. When the detected voltage change is less than the preset trigger threshold, start timing.

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

[0057] In one embodiment of the present invention, after step S2, if the voltage change within a preset time period exceeds a preset trigger threshold, a trigger signal for the high-speed image acquisition device is generated. Then, the trigger signal is transmitted to the high-speed image acquisition device via cable or other communication method. Upon receiving the trigger signal, the high-speed image acquisition device begins image acquisition. In this embodiment, the high-speed image acquisition device is a camera; that is, after receiving the trigger signal, the camera activates to capture images of the lightning discharge process, obtaining images such as... Figure 3 The image shown is a lightning strike image of the Guangzhou Tower acquired by the high-speed image acquisition device.

[0058] After issuing a trigger signal for the high-speed image acquisition device, the system continues to acquire the secondary voltage signal of the transformer in the substation. The system detects the voltage change within a preset time period, and when this change is less than a preset trigger threshold, a timer starts counting and records the duration. Then, it checks whether the countdown exceeds a preset duration (in this embodiment, 10ms, which can be adjusted according to actual needs). Once the countdown exceeds the preset duration, a stop signal for the high-speed image acquisition device is generated. This stop signal is then transmitted to the high-speed image acquisition device via cable or other communication methods. Upon 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 issuing a trigger signal to the high-speed image acquisition device, the system continues monitoring until the voltage oscillation on the secondary side of the transformer decays below a preset trigger threshold. After a certain period, a stop-shooting signal is issued. This duration allows the camera to promptly trigger and capture the main discharge and subsequent discharge processes, thus achieving a complete measurement of the entire lightning discharge process. Furthermore, by issuing a stop-shooting signal, the high-speed image acquisition device can promptly cease image acquisition after the lightning discharge event ends. This avoids continuing image acquisition after the lightning discharge process has ended, preventing invalid images from occupying storage space and improving the efficiency of processing and analyzing valid image data.

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

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

[0062] A storage signal is sent to the high-speed image acquisition device so that the high-speed image acquisition device can store the acquired images.

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

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

[0065] In one embodiment of the present invention, after step S2, if the voltage change within a preset time period does not exceed a preset trigger threshold, the secondary voltage signal of the transformer in the substation is further acquired and the secondary voltage signal of the transformer in the substation is detected.

[0066] Example 2:

[0067] By acquiring the secondary voltage signal of the instrument transformer in the substation;

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

[0069] If the voltage change within a preset time period exceeds a preset trigger threshold, a trigger signal for a 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 turns on to record the lightning discharge process.

[0070] After sending a high-speed image acquisition device trigger signal, the system continues to detect until the voltage oscillation on the secondary side of the transformer decays to below the preset trigger threshold and continues for a period of time before sending a stop video recording signal.

[0071] After issuing a high-speed image acquisition device trigger signal, it also issues a high-speed image acquisition device storage signal, causing the high-speed image acquisition device to save the acquired video data in the corresponding storage medium.

[0072] like Figure 4 As shown, based on the above method embodiments, corresponding system embodiments are provided;

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

[0074] The voltage signal acquisition module is used to acquire the voltage signal on the secondary side of the instrument transformer in the substation.

[0075] The voltage change judgment module is used to determine whether the voltage change of the secondary voltage signal of the current transformer exceeds the preset trigger threshold within a preset time period.

[0076] The trigger signal sending module is used to send a trigger signal to the high-speed image acquisition device so that the high-speed image acquisition device can start image acquisition after receiving the trigger signal;

[0077] The continuous monitoring module is used to continuously monitor the voltage signal on the secondary side of the instrument transformers in the substation.

[0078] like Figure 5 As shown, one 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 emission module;

[0080] The stop signal transmitting module includes: a timing unit and a stop signal transmitting unit;

[0081] The timing unit is used to continue to detect the voltage signal on the secondary side of the instrument transformer in the substation. When the detected voltage change is less than the preset trigger threshold, the timing starts.

[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 the 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 acquired secondary voltage signal of the transformer in the substation as a waveform through the functions and interface provided by the testing equipment.

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

[0086] The storage signal transmitting module is used to transmit storage signals from the high-speed image acquisition device so that the high-speed image acquisition device can store the acquired images.

[0087] It is understood that the above system embodiments correspond to the method embodiments of the present invention, and can implement the lightning-triggered high-speed image acquisition device method provided by any of the above method 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 can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the system embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.

[0089] Based on the above embodiments 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, it implements the lightning-triggered high-speed image acquisition device method of any embodiment of the present invention.

[0090] For example, in this embodiment, the computer program can be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the terminal device.

[0091] The terminal device may be a desktop computer, laptop, handheld computer, or cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0092] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the terminal device, connecting all parts of the terminal device via various interfaces and lines.

[0093] Based on the above-described method embodiments, 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 executed, it controls the device where the computer-readable storage medium is located to execute the lightning-triggered high-speed image acquisition device method described in any of the above-described method embodiments of the present invention.

[0094] The modules / units integrated into the lightning-triggered high-speed image acquisition device system / terminal equipment, if implemented as software functional units and sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0095] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for a lightning-triggered high-speed image acquisition device, characterized in that, include: Obtain the secondary voltage signal of the instrument transformer in the substation; Determine whether the voltage change of the secondary voltage signal of the current 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 can start image acquisition after receiving the trigger signal; If not, continue to detect the secondary voltage signal of the instrument transformer in the substation.

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

3. The lightning-triggered high-speed image acquisition device method according to claim 1, characterized in that, After obtaining the secondary voltage signal of the instrument transformer in the substation, the process also includes: The collected voltage signals from the secondary side of the transformers in the substation are displayed as waveforms using the functions and interface provided by the testing equipment.

4. The lightning-triggered high-speed image acquisition device method according to claim 1, characterized in that, After issuing the high-speed image acquisition device trigger signal, it also includes: A storage signal is sent to the high-speed image acquisition device so that the high-speed image acquisition device can store the acquired images.

5. A lightning-triggered high-speed image acquisition device system, characterized in that, include: Voltage signal acquisition module, voltage change judgment module, trigger signal emission module, and continuous detection module; The voltage signal acquisition module is used to acquire the voltage signal on the secondary side of the instrument transformer in the substation. The voltage change determination module is used to determine whether the voltage change of the secondary voltage signal of the current transformer exceeds a preset trigger threshold within a preset time period. The trigger signal transmitting module is used to transmit a trigger signal for the high-speed image acquisition device, so that the high-speed image acquisition device can start image acquisition after receiving the trigger signal; The continuous detection module is used to continue detecting the voltage signal on the secondary side of the instrument transformer in the substation.

6. The lightning-triggered high-speed image acquisition device system according to claim 5, characterized in that, Also includes: Stop signal transmitting module; The stop signal transmitting module includes: a timing unit and a stop signal transmitting unit; The timing unit is used to continue to detect the voltage signal on the secondary side of the instrument transformer in the substation, and to start timing when the detected 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 waveform of the acquired secondary voltage signal of the transformer in the substation through the functions and interface provided by the testing equipment.

8. The lightning-triggered high-speed image acquisition device system according to claim 5, characterized in that, Also includes: Storage signal transmission module; The storage signal transmitting module is used to transmit a storage signal for the high-speed image acquisition device, so that the high-speed image acquisition device can store the acquired image.

9. A terminal device, characterized in that, The device includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, it implements the lightning-triggered high-speed image acquisition device method as described in any one of claims 1-4.

10. A computer-readable storage medium, characterized in that, include: A stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the lightning-triggered high-speed image acquisition device method as described in any one of claims 1-4.

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