Electrostatic discharge superspeed image recording device

Abstract

The invention provides an electrostatic discharge ultra-high-speed image recording device. Relates to the image acquisition field. Comprising a spectroscope used for dividing a light beam generated by electrostatic discharge into a first discharge split light beam and a second discharge split light beam; the synchronous triggering unit is used for generating a first starting signal, a second starting signal and a third starting signal; the first starting signal, the second starting signal and the third starting signal simultaneously reach the high-speed camera, the first rotary reflecting mirror and the linear array camera; the high-speed camera is used for collecting the first discharge split beam to obtain a first played image under the condition that the first starting signal is received; the first rotary reflecting mirror is used for reflecting the second discharge split light beam; under the condition that a second starting signal is received, the rotating device rotates at a set speed; and the line-scan digital camera is used for collecting the reflected second discharge split beam under the condition that the third starting signal is received to obtain a second played image.

Description

Technical Field

[0001] The present invention relates to the field of electrical performance testing, and in particular to an electrostatic discharge ultra-high-speed image recording device. Background Art

[0002] Electrostatic discharge (ESD) refers to the instantaneous transfer of charge between objects with different electrostatic potentials when they come into close proximity or direct contact. This process generates transient high voltages and large currents, with peak voltages reaching thousands or even tens of thousands of volts, and currents reaching several amperes for a short period of time. In fields such as electrical engineering automation, aerospace electromagnetic compatibility, and electronic engineering, a large number of highly integrated chips and complex electronic devices require extremely stable electrostatic environments. Even the smallest ESD discharge can disrupt the normal operation of equipment, causing data errors, signal interruptions, and even, in severe cases, permanent damage to chips and electronic components, threatening the reliability and safety of the entire system. Therefore, the recording and research of ESD phenomena is crucial.

[0003] At present, the technologies used to record the transient process of electrostatic discharge mainly include oscilloscope measurement, electromagnetic field simulation and measurement, conventional high-speed photography technology and special test equipment.

[0004] However, oscilloscope measurement methods suffer from distortion. Specifically, when measuring ESD signals, the spectrum of the ESD process is very wide and contains high-frequency components. If the number of sampling points is insufficient or the sampling rate is not high enough, these high-frequency components of the signal will be lost, distorting the reconstructed waveform and failing to accurately reflect the true electrical signal characteristics of the ESD. Furthermore, if the oscilloscope's bandwidth is insufficient, some high-frequency voltage and current variations during the ESD process will not be accurately captured, resulting in inaccurate measurement results. Furthermore, high-sensitivity oscilloscopes are more likely to introduce more noise, which can interfere with the observation and analysis of the true signal.

[0005] In electromagnetic field simulation and measurement, when modeling the actual electrostatic discharge physical process, it is often necessary to simplify and make assumptions about complex object shapes, material properties, and boundary conditions in order to perform numerical calculations. However, these simplifications and assumptions can lead to deviations between simulation results and actual conditions.

[0006] The trade-off between spatial resolution and temporal resolution in conventional high-speed photography is a major issue. To increase the shooting speed, conventional high-speed cameras often need to reduce the pixel size or number of the image sensor in order to complete image acquisition and processing within a limited timeframe. This results in a sacrifice in spatial resolution. When capturing transient electrostatic discharge processes, subtle changes in the discharge process, such as tiny arc shapes and charge distribution details, may not be clearly observed due to the reduced spatial resolution. Furthermore, conventional high-speed cameras generally only have a maximum speed of 200,000 frames per second, while electrostatic discharge processes typically occur on a timescale of nanoseconds (ns) to microseconds (μs). For studying transient electrostatic discharge processes, this shooting rate is far from sufficient to subdivide the discharge process and fully record detailed information about each stage, including the start, development, and end of the discharge.

[0007] Spark-specific testing equipment, such as electrostatic spark sensitivity testers for pyrotechnics, is developed to address specific research needs and is therefore highly specialized, suitable only for specific research scenarios and test subjects. For example, electrostatic spark sensitivity testers for pyrotechnics can only be used to test the ignition of pyrotechnics under electrostatic discharge. They are virtually inapplicable to other types of electrostatic discharge research, such as electrostatic protection testing of electronic equipment and electrostatic discharge monitoring of power systems. Furthermore, the operation of these specialized test equipment is often very complex, requiring specialized training from professionals. The equipment's operating procedures are often complex, involving the setting and debugging of multiple parameters, and require high levels of professional skills from the operator. Due to its high degree of specificity and complex operation, the scope of application of this type of equipment is relatively limited, making it difficult to be widely used in different fields and unable to meet the diverse needs of electrostatic discharge monitoring and research.

[0008] Prior art, such as Chinese invention patent publication number CN112213604A, discloses a novel interferometric monitoring device and method for transformer oil impurity concentration changes. The device comprises a spectrometer and a lightning surge generator for applying an external electric field. The spectrometer is centered on itself, and is equipped with a camera for capturing interference fringes, a reflector M1, a reflector M2, and a beam expander in four facing directions, respectively, located in the front, back, left, and right directions. The beam expander is also provided with a laser light source on the side not facing the spectrometer. The positive and negative electrodes of the lightning surge generator are each connected to an electrode plate, and the electrode plates corresponding to the positive and negative electrodes of the lightning surge generator are disposed between the reflector M1 and the spectrometer. The camera is also connected to a computer for real-time reproduction of interference fringe monitoring results. However, the present application does not disclose the specific structure of the device that can continuously capture a large number of images in a very short time, accurately capturing the high-speed changes during electrostatic discharge. It also enables high-resolution recording of large-area scenes. Summary of the Invention

[0009] To address the technical problems existing in the prior art, the present invention aims to provide an ultra-high-speed electrostatic discharge (ESD) imaging device capable of continuously capturing a large number of images in a very short time, accurately capturing the rapid changes in ESD. This device can record large areas at high resolution, fully capturing both the details and overall morphology of ESD.

[0010] To achieve the above-mentioned object of the invention, the present invention provides an electrostatic discharge ultra-high-speed image recording device, comprising a spectrometer, a synchronous trigger unit, a high-speed camera, a first rotating reflector and a linear array camera;

[0011] The beam splitter is used to split the light beam generated by electrostatic discharge into a first discharge sub-beam and a second discharge sub-beam;

[0012] The synchronous trigger unit is used to generate a first start signal, a second start signal and a third start signal;

[0013] The first start signal, the second start signal and the third start signal arrive at the high-speed camera, the first rotating reflector and the linear array camera simultaneously;

[0014] The high-speed camera is configured to collect the first discharge sub-beam to obtain a first discharge image when receiving the first start signal;

[0015] The first rotating reflector is used to reflect the second discharge sub-beam and rotate at a set rate upon receiving a second start signal;

[0016] The linear array camera is used to collect the reflected second discharge sub-beam upon receiving the third start signal to obtain a second discharge image.

[0017] According to a technical solution of the present invention, the electrostatic discharge ultra-high-speed image recording device further includes an electrostatic discharge detection sensor;

[0018] The electrostatic discharge detection sensor is used to generate a discharge detection signal after detecting electrostatic discharge;

[0019] The synchronous trigger unit is also used to determine whether the discharge detection signal exceeds a preset trigger threshold when the discharge detection signal is obtained; if the discharge detection signal exceeds the preset trigger threshold, the first start signal, the second start signal and the third start signal are generated after the delay is set for a first time length.

[0020] According to a technical solution of the present invention, the electrostatic discharge ultra-high-speed image recording device further includes an electrostatic discharge generator;

[0021] The electrostatic discharge generator is used to perform electrostatic discharge with a set voltage and pulse width; and generate a discharge trigger signal after the electrostatic discharge;

[0022] The synchronous trigger unit is further configured to delay for a set first time length and then generate a first start signal, a second start signal and a third start signal when a discharge trigger signal is obtained.

[0023] According to a technical solution of the present invention, the electrostatic discharge ultra-high-speed image recording device further includes a fault processing unit;

[0024] The fault processing unit is used to obtain the working status of the high-speed camera, the first rotating reflector and the linear array camera; and when the working status of the high-speed camera, the first rotating reflector or the linear array camera is abnormal, the fault processing unit is used to perform fault processing on the high-speed camera, the first rotating reflector or the linear array camera according to a preset fault processing scheme.

[0025] According to a technical solution of the present invention, the electrostatic discharge ultra-high-speed image recording device further includes a second rotating reflective mirror;

[0026] The fault processing unit is further configured to generate a reflector fault signal when the working state of the first rotating reflector is abnormal;

[0027] The synchronous trigger unit is further configured to generate a first stop signal, a second stop signal and a third stop signal in the case of obtaining a reflector fault signal;

[0028] The high-speed camera, the first rotating reflector and the linear array camera are further configured to stop working when receiving a first stop signal, a second stop signal and a third stop signal respectively;

[0029] The synchronous trigger unit is further configured to delay for a set second time period and then generate the first start signal, the third start signal and the fourth start signal when a reflector fault signal is obtained;

[0030] The second rotating reflector is used to reflect the second discharge sub-beam and rotate at a set speed when receiving a fourth start signal.

[0031] According to a technical solution of the present invention, the electrostatic discharge ultra-high-speed image recording device further includes a control unit;

[0032] The control unit is used to set parameters of the synchronization trigger unit, the high-speed camera, the first rotating reflector, the second rotating reflector, the linear array camera, and the electrostatic discharge generator based on input parameter information or preset parameter information;

[0033] The parameters of the synchronization trigger unit include a first delay time, a second delay time, a trigger threshold, and;

[0034] The parameters of the high-speed camera include frame rate, resolution and high-speed camera gain;

[0035] The parameters of the first rotating reflector and the second rotating reflector include rotation speed, rotation duration and initial angle;

[0036] The parameters of the line scan camera include field of view angle, line width, line frequency and line scan camera gain;

[0037] The parameters of the electrostatic discharge generator include the voltage and pulse width of the electrostatic discharge.

[0038] According to a technical solution of the present invention, the rotation speed satisfies the following formula:

[0039]

[0040] Where n is the rotation speed and t is the electrostatic discharge duration.

[0041] According to a technical solution of the present invention, the electrostatic discharge ultra-high-speed image recording device further includes an image processing unit;

[0042] The image processing unit is configured to process the first discharge image and / or the second discharge image;

[0043] The processing includes noise reduction, image enhancement and feature extraction.

[0044] According to a technical solution of the present invention, the electrostatic discharge ultra-high-speed image recording device further includes an alarm unit;

[0045] The fault processing unit is further configured to generate corresponding fault information based on a preset fault processing solution when the working state of the high-speed camera, the first rotating reflector or the linear array camera is abnormal;

[0046] The alarm unit is used to send the fault information to a remote end.

[0047] According to a technical solution of the present invention, the electrostatic discharge ultra-high-speed image recording device further includes an electromagnetic shielding shell;

[0048] The spectroscope, the synchronous trigger unit, the high-speed camera, the first rotating reflector, the linear array camera, the fault processing unit, the second rotating reflector and the image processing unit are all arranged in the electromagnetic shielding shell.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The electrostatic discharge ultra-high-speed image recording device of the present invention provides a recording device integrating high-definition, high-speed capturing and recording functions.

[0051] It can continuously capture a large number of images in a very short time, accurately capturing the high-speed changes in the electrostatic discharge process. It can record large areas at high resolution, fully capturing the details and overall form of electrostatic discharge. It can not only accurately capture every detail of the electrostatic discharge moment, but also has the ability to deeply analyze the discharge formation mechanism and affected areas.

[0052] This product is applicable to a variety of fields, including aerospace electromagnetic compatibility research, power system stability and safety monitoring, electrical fault diagnosis, and electronic engineering education and practical innovation. It meets the stringent demands for ESD monitoring in aerospace, power systems, electronic engineering, and other fields, ensuring stable system operation and promoting technological development in related fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0054] Figure 1 A diagram schematically showing the electrical structure of an electrostatic discharge ultra-high-speed image recording device according to one embodiment of the present invention;

[0055] Figure 2 A schematic diagram showing the layout of an electrostatic discharge ultra-high-speed image recording device according to one embodiment of the present invention;

[0056] Figure 3 The figure schematically shows an operation flow chart of an electrostatic discharge ultra-high-speed image recording device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The description of the embodiments in this specification should be combined with the corresponding drawings, which should be considered a complete part of this specification. In the drawings, the shapes and thicknesses of the embodiments may be exaggerated and indicated for simplicity or convenience. Furthermore, the various structural components in the drawings will be described separately. It is worth noting that components not shown in the drawings or not described in words are known to those of ordinary skill in the art.

[0058] The description of the embodiments herein and any references to directions and orientations are for ease of description only and are not to be construed as limiting the scope of the present invention. The following description of the preferred embodiments may involve combinations of features, which may exist independently or in combination. The present invention is not specifically limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0059] like Figures 1 to 3 As shown, an electrostatic discharge ultra-high-speed image recording device of the present invention includes a spectroscope 1, a synchronous trigger unit 2, a high-speed camera 3, a first rotating reflector 4 and a linear array camera 5;

[0060] A beam splitter 1 is used to split the light beam generated by electrostatic discharge into a first discharge sub-beam and a second discharge sub-beam;

[0061] Synchronous trigger unit 2, used to generate a first start signal, a second start signal and a third start signal;

[0062] The first start signal, the second start signal and the third start signal simultaneously reach the high-speed camera 3, the first rotating reflector 4 and the linear array camera 5;

[0063] The high-speed camera 3 is configured to capture the first discharge sub-beam to obtain a first discharge image upon receiving the first start signal;

[0064] The first rotating reflector 4 is used to reflect the second discharge sub-beam and rotate at a set speed when receiving the second start signal;

[0065] The line array camera 5 is configured to collect the reflected second discharge sub-beam upon receiving the third start signal to obtain a second discharge image.

[0066] In this embodiment, the electrostatic discharge ultra-high-speed image recording device mainly comprises a beam splitter 1 , a synchronous trigger unit 2 , a high-speed camera 3 , a linear array camera 5 and a first rotating reflector 4 .

[0067] The spectroscope 1 splits a beam of light into two beams, which are respectively provided to the high-speed camera 3 and the linear array camera 5 to record images, ensuring that the two cameras (the high-speed camera 3 and the linear array camera 5) can simultaneously obtain image information of the electrostatic discharge process without interfering with each other.

[0068] The synchronous trigger unit 2 sends a multi-channel synchronous trigger signal to enable the high-speed camera 3, the linear array camera 5 and the (first) rotating reflector 4 to start working at the same time, ensuring the precise synchronization of the actions of each device.

[0069] The high-speed camera 3 is responsible for capturing the high-speed changing details during the electrostatic discharge process to obtain the first discharge image. It quickly processes the image data collected by the sensor and stores it in the cache inside the camera.

[0070] The first rotating mirror 4 serves as an optical reflective scanning device and is driven by a motor to rotate at high speed (the speed can be adjusted within the range of 5000 rpm to 20000 rpm according to actual needs). During the rotation process, the light from the electrostatic discharge area is reflected onto the sensor of the line scan camera 5, thereby improving the sampling rate and field of view coverage of the line scan camera.

[0071] Linear array camera 5 records the overall shape and impact area of ​​the discharge phenomenon. It uses the same imaging principle as a linear array of pixels, scanning the image line by line, combined with image reflection from first rotating mirror 4, to efficiently capture large areas.

[0072] Among them, the synchronous trigger unit 2 synchronously outputs and transmits the trigger signal to the high-speed camera 3, the linear array camera 5 and the (first) rotating reflector 4 through the signal cable, so that the equipment starts collecting data; the image processing workstation is responsible for the subsequent analysis and processing of the impact data collected and recorded by the high-speed camera 3 and the linear array camera 5, as well as video editing.

[0073] The above-mentioned high-speed camera 3:

[0074] Ultra-high-speed cameras with ultra-high frame rates of 7-100 million frames per second at megapixels, or multi-channel framing cameras with frame rates up to 1 billion frames per second, can present the electrostatic discharge process in a denser sequence of images. This allows for the continuous capture of a large number of images in a very short period of time, accurately capturing the high-speed changes in the electrostatic discharge process. This allows for the capture of subtle arc changes at the start of the discharge, charge transfer trajectories, and other details with nanosecond precision, ensuring that no critical moments are missed.

[0075] The line array camera 5 cooperates with the first rotating reflector 4:

[0076] Line scan camera 5 can be a large-area linear array camera for capturing large-area ESD scenes. Paired with a 24mm wide-angle lens, it offers a field of view of up to 84 degrees, a total resolution of up to 15,000 x 4,096 pixels, with each line width of 4,096 x 3 pixels and a line rate of up to 40 kHz. This wide field of view and ultra-wide resolution allows for dynamic optical path adjustment by the (first) rotating reflector 4, continuously projecting transient images of ESD changes onto the large-area sensor of line scan camera 5, ensuring complete recording. The high resolution and line rate ensure clear and detailed recording of the discharge phenomena.

[0077] The first rotating reflector 4 can be made of an aluminum alloy body with a K9 glass lens. Driven by a high-speed motor, it can rotate at speeds of 5,000-20,000 rpm. This rapid rotation allows the prism of the first rotating reflector 4 to reflect more discharge images onto the sensor of the line scan camera 5 per unit time, thereby capturing more images of the transient discharge process, enhancing the ability to capture transient processes and achieving more comprehensive and detailed recording.

[0078] The large area array of line scan cameras 5 offers a wide field of view and high resolution. Combined with the first rotating reflector 4, they can record large areas at high resolution, fully capturing the details and overall shape of electrostatic discharges. This line scan camera 5 can capture both surface and line images. When capturing surface images, the large area scan cameras can be configured as line arrays of a certain width, allowing multiple images to be captured from a single surface. For example, if the width is set to 10 pix, a 4000 pix array can capture 400 images.

[0079] Synchronous trigger unit 2: Synchronous trigger unit 2 simultaneously issues trigger signal instructions (first, second, and third start signals) to multiple channels. Its multi-channel synchronization accuracy reaches the picosecond (ps) level. It can simultaneously and precisely instruct high-speed camera 3 and line array camera 5 to begin recording, and also synchronously instruct first rotating mirror 4 to rotate at high speed. This precise synchronization prevents the impact of timing errors on high-speed image recording. In actual testing, across multiple experiments, the timing error between each device's start-up was kept within 1%, ensuring the accuracy and completeness of the recordings and ensuring a high degree of temporal and spatial consistency in the captured images of the discharge process, facilitating subsequent precise analysis.

[0080] This embodiment combines ultra-high-speed imaging technology with large-area linear array optical scanning technology. In existing technologies, high-speed photography and large-scale scene recording are often difficult to achieve simultaneously. However, this embodiment utilizes the ultra-high frame rate of an ultra-high-speed camera (high-speed camera 3) to capture discharge details, while a linear array camera 5 (large-area linear array camera) works in conjunction with a (first) rotating mirror 4 to achieve large-scale scene coverage, bringing a new perspective to electrostatic discharge monitoring. It not only captures the microscopic process of discharge, but also understands its macroscopic impact range, providing comprehensive data support for studying the overall characteristics of electrostatic discharge.

[0081] The synchronous trigger unit 2 of this embodiment not only achieves picosecond-level multi-channel synchronization accuracy but also has an extremely fast response speed. This technological breakthrough ensures the highly accurate coordination of various devices, allowing the captured images to truly and accurately reflect the transient process of electrostatic discharge, providing a reliable data foundation for subsequent scientific research and engineering applications.

[0082] The electrostatic discharge ultra-high-speed image recording device further includes an electrostatic discharge detection sensor 6;

[0083] An electrostatic discharge detection sensor 6 is used to generate a discharge detection signal after detecting electrostatic discharge;

[0084] The synchronous trigger unit 2 is also used to determine whether the discharge detection signal exceeds the preset trigger threshold when the discharge detection signal is obtained; if the discharge detection signal exceeds the preset trigger threshold, it delays for a set first time length and then generates a first start signal, a second start signal and a third start signal.

[0085] In this embodiment, the synchronous trigger unit 2 obtains the start input signal (discharge detection signal) through the electrostatic discharge detection sensor 6, and then according to the delay parameter setting, synchronously sends the first start signal, the second start signal and the third start signal to multiple channels after the delay time is arrived.

[0086] The time delay of the synchronous trigger unit 2 is set by the control unit 10. In the figure, the synchronous trigger unit 2 monitors the moment of the trigger input signal and sends a synchronous trigger output signal after the delay is reached according to the set delay parameters, triggering the high-speed camera 3 and the linear array camera 5 to start shooting and the first rotating mirror 4 to start rotating.

[0087] This embodiment is applied to equipment that generates electrostatic discharge during actual operation. Among them, the electrostatic discharge detection sensor 6 adopts a slit photosensitive sensor, which is used to detect the parts of the equipment that are prone to electrostatic discharge. When the equipment generates electrostatic discharge, the slit photosensitive sensor captures the electrostatic discharge and generates a discharge detection signal. After obtaining the discharge detection signal, the synchronous trigger unit 2 determines whether the discharge detection signal exceeds the preset trigger threshold (the trigger threshold is used to determine whether it is really an electrostatic discharge or meets the acquisition standard, where the trigger threshold can be set to a value related to the peak value of the discharge voltage, etc.). If the discharge detection signal exceeds the preset trigger threshold, the first time length set is delayed, and then the first start signal, the second start signal and the third start signal are generated. The purpose of the delay is to enable each device to start recording and collecting data at the correct time starting point. The delay range is within 100ps.

[0088] The electrostatic discharge ultra-high-speed image recording device further includes an electrostatic discharge generator 7;

[0089] The electrostatic discharge generator 7 is used to perform electrostatic discharge with a set voltage and pulse width; and generate a discharge trigger signal after the electrostatic discharge;

[0090] The synchronous trigger unit 2 is further configured to delay for a set first time period and then generate a first start signal, a second start signal and a third start signal when a discharge trigger signal is obtained.

[0091] In this embodiment, the synchronous trigger unit 2 obtains the start input signal (discharge trigger signal) through the electrostatic discharge generator 7, and then synchronously sends the first start signal, the second start signal and the third start signal to multiple channels after the delay time is reached according to the delay parameter setting.

[0092] This embodiment can also be applied in the process of performing electrostatic discharge detection on equipment. Among them, the electrostatic discharge generator 7 uses a trigger electrostatic discharge device to simulate electrostatic discharge on the part of the equipment that needs electrostatic discharge. When the electrostatic discharge generator 7 generates electrostatic discharge, it generates a discharge trigger signal at the same time (or uses a trigger switch to simultaneously trigger the electrostatic discharge generator 7 and the synchronous trigger unit 2). After obtaining the discharge trigger signal, the synchronous trigger unit 2 delays for a set first time length, and then generates a first start signal, a second start signal, and a third start signal. The purpose of the delay is to enable each device to start recording and collecting data at the correct time starting point. The delay range is approximately within 100ps.

[0093] The electrostatic discharge ultra-high-speed image recording device further includes a fault processing unit 8;

[0094] The fault processing unit 8 is used to obtain the working status of the high-speed camera 3, the first rotating reflector 4 and the linear array camera 5; and when the working status of the high-speed camera 3, the first rotating reflector 4 or the linear array camera 5 is abnormal, the high-speed camera 3, the first rotating reflector 4 or the linear array camera 5 is fault-handled according to a preset fault-handling scheme.

[0095] In this embodiment, the fault handling unit 8 is set to deal with possible faults of the device. It can be configured in the same processing unit as the control unit 10, or it can be configured as an independent processing unit. The internal configuration has corresponding fault handling solutions, such as:

[0096] In the event of a possible malfunction in high-speed camera 3, such as a data processing anomaly that causes interruption of filming, the device is equipped with a backup storage module. If a problem occurs with the primary camera, the system automatically switches to the backup storage module to continue recording image data while automatically reducing the shooting frame rate to ensure that critical data is not lost.

[0097] When the line scan camera 5 fails, or if the camera lens is damaged, affecting the shooting quality, the system will automatically adjust the shooting parameters and use the high-speed camera 3 to compensate for the loss of the shooting range of the line scan camera 5 to a certain extent, thereby maintaining basic recording functions.

[0098] The electrostatic discharge ultra-high-speed image recording device further includes a second rotating reflector 9;

[0099] The fault processing unit 8 is further configured to generate a reflector fault signal when the working state of the first rotating reflector 4 is abnormal;

[0100] The synchronous trigger unit 2 is further configured to generate a first stop signal, a second stop signal and a third stop signal when a reflector fault signal is obtained;

[0101] The high-speed camera 3, the first rotating reflector 4 and the linear array camera 5 are further configured to stop working when receiving the first stop signal, the second stop signal and the third stop signal respectively;

[0102] The synchronous trigger unit 2 is further configured to delay for a set second time period and then generate the first start signal, the third start signal and the fourth start signal when a reflector fault signal is obtained;

[0103] The second rotating reflector 9 is used to reflect the second discharge sub-beam and rotates at a set speed upon receiving the fourth start signal.

[0104] In this embodiment, the fault handling unit 8 is set to deal with possible faults that may occur in the device. For example, when the first rotating reflector 4 fails, such as the motor is stuck and causes abnormal rotation, the synchronous trigger unit 2 will immediately stop the entire shooting process to prevent image confusion caused by the abnormality of the first rotating reflector 4, and at the same time start the spare second rotating reflector 9 to ensure that the experiment can continue.

[0105] The electrostatic discharge ultra-high-speed image recording device further includes a control unit 10;

[0106] A control unit 10 is configured to set parameters of the synchronization trigger unit 2, the high-speed camera 3, the first rotating reflector 4, the second rotating reflector 9, the linear array camera 5, and the electrostatic discharge generator 7 based on input parameter information or preset parameter information;

[0107] The parameters of the synchronous trigger unit 2 include the first delay duration, the second delay duration, the trigger threshold, and the signal form of the first start signal, the third start signal, and the fourth start signal. The signal form is mainly a single pulse square wave, and the time synchronization of different signal channels is performed in a rising edge triggering manner.

[0108] The parameters of the high-speed camera 3 include frame rate, resolution, and high-speed camera gain;

[0109] The parameters of the first rotating reflector 4 and the second rotating reflector 9 include rotation speed, rotation time and initial angle;

[0110] The parameters of the line scan camera 5 include the field of view angle, line width, line frequency and line scan camera gain;

[0111] The parameters of the electrostatic discharge generator 7 include the voltage and pulse width of the electrostatic discharge.

[0112] In this embodiment, the control unit 10 is connected to the synchronous trigger unit 2, the high-speed camera 3, the first rotating reflector 4, the linear array camera 5, the second rotating reflector 9, and the electrostatic discharge device through control cables to send control signals.

[0113] The control unit 10 utilizes an ARM+FPGA core processor, running a customized RTOS or LINUX operating system, and equipped with corresponding control software. Regarding parameter settings, it can flexibly adjust operating parameters such as the frame rate and resolution of the high-speed camera 3; precisely set the field of view and sampling rate of the linear array camera 5; and accurately control the rotation speed of the first rotating reflector 4. Regarding device control, the control unit 10 can set the operating parameters of the electrostatic discharge generator 7 and the synchronous trigger unit 2, and can also control the operating status of both devices.

[0114] The initial angle of the first rotating reflector 4 can be set so that the normal line of the reflector is perpendicular to the optical axis of the line array camera 5 , so as to facilitate recording of the angle of the first rotating reflector 4 .

[0115] The above parameters are not set arbitrarily. The setting of each parameter depends on the discharge waveform range, duration, discharge voltage spectrum width and other information to be captured. It does not mean that the higher the frame rate, the better, nor the higher the rotation speed, the better.

[0116] High frame rates and rotation speeds will lead to a dramatic increase in the amount of collected data, making collection, storage, and processing more difficult;

[0117] High frame rates require higher lighting conditions, and shorter exposure times can lead to increased noise within the image, affecting image quality and sacrificing details.

[0118] In practical applications, it is necessary to weigh data management, cost, resources, resolution and other aspects to find the best balance.

[0119] The speed satisfies the following formula:

[0120]

[0121] Where n is the rotation speed and t is the electrostatic discharge duration.

[0122] In this embodiment, the rotation speed setting of the rotating prism is mainly related to the discharge duration. The faster the discharge duration, the faster the rotation speed setting.

[0123] Among them, the discharge duration is usually obtained based on estimation and prior knowledge.

[0124] The electrostatic discharge ultra-high-speed image recording device further includes an image processing unit 11;

[0125] An image processing unit 11 is configured to process the first discharge image and / or the second discharge image;

[0126] Processing includes noise reduction, image enhancement, and feature extraction.

[0127] In this embodiment, the image processing unit 11 can be a dedicated imaging workstation. After recording the first discharge image and the second discharge image, the image processing unit 11 uses built-in image processing and data analysis algorithms to process and analyze the recorded image data, such as removing noise, enhancing contrast, and extracting discharge features.

[0128] The electrostatic discharge ultra-high-speed image recording device further includes an alarm unit 12;

[0129] The fault processing unit 8 is further configured to generate corresponding fault information based on a preset fault processing solution when the working state of the high-speed camera 3, the first rotating reflector 4 or the line array camera 5 is abnormal;

[0130] The alarm unit 12 is used to send fault information to a remote end.

[0131] In this embodiment, when the device may fail, a fault alarm message can be sent to the operator through the built-in alarm unit 12 (wireless communication module) to notify the operator to perform corresponding subsequent processing in the first time.

[0132] The electrostatic discharge ultra-high-speed image recording device further includes an electromagnetic shielding shell 13;

[0133] The spectroscope 1 , the synchronous trigger unit 2 , the high-speed camera 3 , the first rotating reflector 4 , the linear array camera 5 , the fault processing unit 8 , the second rotating reflector 9 and the image processing unit 11 are all arranged in an electromagnetic shielding shell 13 .

[0134] In this embodiment, electromagnetic compatibility is fully considered, and the housing of each device adopts a high-permeability metal material shielding structure (electromagnetic shielding housing 13), which has a good shielding effect on electromagnetic interference generated by electrostatic discharge.

[0135] Shielded cables are used for key signal lines, and filtering circuits are added to effectively suppress conducted and radiated interference. These measures ensure the device's stable operation in complex electromagnetic environments, allowing it to operate normally in electromagnetic interference environments with electric field strengths up to 500V / m and magnetic field strengths up to 0.1T, expanding the device's application scenarios.

[0136] The above-mentioned technology can more effectively cope with complex electromagnetic environments. For example, in the aerospace field, there are multiple strong electromagnetic interference sources inside the aircraft. The electromagnetic compatibility design of this device makes it suitable for a variety of fields such as aerospace electromagnetic compatibility research, power system stability and safety monitoring, electrical fault diagnosis, and electronic engineering education and practical innovation. It is not affected by electromagnetic interference during electrostatic discharge and can operate stably in various complex scenarios and harsh environments, ensuring the accuracy of data recording.

[0137] In summary, if Figure 3 As shown, the specific operation process of the present invention is as follows:

[0138] Preparation phase: Based on experimental requirements, the operator sets the parameters of the high-speed camera 3, line scan camera 5, and first rotating mirror 4 through the user interface of the control unit 10. For example, the frame rate of the high-speed camera 3 is set to 10 million frames per second, the line scan camera 5 is set to a line width of 4096×3 and a line frequency of 40kHz, and the rotation speed of the (first) rotating mirror 4 is set to 10,000 rpm. Simultaneously, the operator also sets the delay time and input trigger threshold of the synchronization trigger unit 2 and the operating parameters of the electrostatic discharge generator 7.

[0139] Monitoring stage: The synchronous trigger unit 2 constantly monitors the triggering working instructions of the electrostatic discharge generator 7. When the trigger signal instruction is detected to exceed the set trigger threshold, the synchronous trigger unit 2 immediately and synchronously sends a trigger signal to multiple output channels.

[0140] Recording Phase: Upon receiving the trigger signal, high-speed camera 3 and line scan camera 5 immediately begin recording. High-speed camera 3 continuously records at a set frame rate, capturing the high-speed changes in the electrostatic discharge process. Line scan camera 5, in conjunction with first rotating mirror 4, captures the overall shape of the discharge phenomenon and the affected area. During the recording process, first rotating mirror 4 maintains high-speed rotation, continuously reflecting images of the discharge area onto line scan camera 5.

[0141] Processing and Analysis Phase: After recording is complete, the image data captured by the high-speed camera 3 and the line scan camera 5 are processed by a dedicated image processing unit 11. First, the images are subjected to noise reduction processing to remove noise generated during the shooting process. Then, an image enhancement algorithm is used to improve the image contrast and clarity to facilitate subsequent analysis. Finally, a feature extraction algorithm is used to extract key feature information such as the discharge trajectory and discharge intensity. Operators can use this information to further explore the formation mechanism of electrostatic discharge and the discharge impact area.

[0142] Environmental Impacts and Solutions: Temperature significantly impacts device performance. High-speed Camera 3's sensor and data processor may overheat and experience frequency throttling in high-temperature environments. To address this, the device is equipped with a highly efficient heat dissipation system that combines liquid cooling and heat sinks to ensure stable camera operation even in high-temperature environments.

[0143] In a low-temperature environment, the performance of the camera battery will decline and the movement of mechanical parts will be hindered. This can be solved by preheating the device in advance and adding an insulation cover to the battery.

[0144] Regarding humidity, if the ambient humidity is too high, it may cause fogging of optical components and short circuits of electronic components. A humidity sensor is installed inside the device. Once it detects excessive humidity, it automatically activates the dehumidification device to maintain a dry internal environment.

[0145] At the same time, the signal transmission line of the synchronous trigger unit 2 is optimized, and optical fiber transmission and other methods with stronger anti-interference capabilities are adopted to ensure that each device can still be accurately triggered to work in an extreme electromagnetic interference environment.

[0146] The device of the present invention is applicable to the following scenarios:

[0147] 1. In the aerospace field, electronic equipment is extremely sensitive to electrostatic discharge. To simulate the electrostatic discharge conditions encountered by aircraft during flight, a special experimental chamber was built.

[0148] The interior of the experimental cabin simulates the high-altitude electromagnetic environment, and electrostatic discharge generators of different intensities are set up to simulate electrostatic discharge events that the aircraft may encounter under different flight conditions.

[0149] The frame rate of high-speed camera 3 was set to 8 million frames per second, and the resolution of line array camera 5 was adjusted to the highest to ensure clear recording of the discharge process.

[0150] The rotation speed of the first rotating reflector 4 is set to a relatively high range according to experimental requirements, so that the line array camera 5 can quickly acquire scene information of a large area.

[0151] Synchronous trigger unit 2, linked to electrostatic discharge generator 7, precisely triggers each device to operate at the moment of discharge. During the experiment, simulated avionics equipment installed in the test chamber was subjected to electrostatic discharge tests, with each discharge process recorded. Analysis of this video data enabled operators to identify previously overlooked discharge propagation paths, providing key insights for optimizing electrostatic protection designs for avionics equipment.

[0152] In this scenario, the voltage of the aircraft's electrostatic discharge is relatively high, reaching 100,000 volts. Furthermore, due to the complexity and diversity of the instruments and equipment within the aircraft, the discharge waveform spectrum is richer, and more attention is paid to the frequency domain composition and analysis of the discharge waveform. Therefore, the ultra-high-speed camera frame rate is set to 8 million frames, which is the result of actual testing.

[0153] 2. In electronic equipment production workshops, this device is used in the quality inspection process to test the electrostatic protection performance of electronic products on the production line. Different electrostatic discharge test standards and parameters are set for different types of electronic products, such as mobile phone motherboards and computer chips.

[0154] For mobile phone motherboard testing, high-speed camera 3 is set to a frame rate of 6 million frames per second, and line scan camera 5 adjusts its field of view to cover the entire motherboard. When performing ESD testing on the motherboard, synchronized trigger unit 2 rapidly activates each device. Analysis of the captured images clearly demonstrates the propagation of ESD along the motherboard's circuitry, enabling timely identification of circuit design flaws or areas of insufficient protection.

[0155] During an actual inspection, through observation of images, it was discovered that a batch of mobile phone motherboards had concentrated discharge in a specific area. After analysis, it was found that the grounding design in this area was unreasonable. The production department was notified in time to make improvements, which avoided the outflow of a large number of unqualified products and improved product quality and production efficiency.

[0156] In this scenario, the electrostatic discharge waveform of a circuit board in a production workshop is collected. The focus is on the peak and duration of the discharge waveform. Therefore, the frame rate of the high-speed camera 3 in this example is set to 6 million frames, which can meet the test requirements.

[0157] The present invention relates to an electrostatic discharge ultra-high-speed image recording device. The device relates to the field of image acquisition and comprises: a spectroscope for splitting a light beam generated by electrostatic discharge into a first discharge sub-beam and a second discharge sub-beam; a synchronous trigger unit for generating a first start signal, a second start signal, and a third start signal; the first start signal, the second start signal, and the third start signal simultaneously reaching a high-speed camera, a first rotating reflector, and a linear array camera; the high-speed camera for capturing the first discharge sub-beam upon receiving the first start signal to obtain a first discharge image; the first rotating reflector for reflecting the second discharge sub-beam and rotating at a set rate upon receiving the second start signal; and the linear array camera for capturing the reflected second discharge sub-beam upon receiving the third start signal to obtain a second discharge image.

[0158] In addition, it should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or terminal device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device comprising the element.

[0159] Finally, it should be noted that the above is a preferred embodiment of the present invention. It should be noted that although the preferred embodiment of the present invention has been described, it is clear that those skilled in the art, once they understand the basic inventive concept of the present invention, can make various improvements and modifications without departing from the principles of the present invention. Such improvements and modifications should also be considered as within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the embodiments of the present invention.

Claims

1. An electrostatic discharge ultra-high-speed image recording device, characterized in that: It comprises a spectroscope (1), a synchronous trigger unit (2), a high-speed camera (3), a first rotating reflector (4) and a linear array camera (5); The beam splitter (1) is used to split the light beam generated by electrostatic discharge into a first discharge sub-beam and a second discharge sub-beam; The synchronous trigger unit (2) is used to generate a first start signal, a second start signal and a third start signal; The first start signal, the second start signal and the third start signal simultaneously arrive at the high-speed camera (3), the first rotating reflector (4) and the linear array camera (5); The high-speed camera (3) is used to collect the first discharge sub-beam to obtain a first discharge image when receiving a first start signal; The first rotating reflector (4) is used to reflect the second discharge sub-beam and rotate at a set speed when receiving a second start signal; The linear array camera (5) is used for collecting the reflected second discharge sub-beam upon receiving the third start signal to obtain a second discharge image.

2. The electrostatic discharge ultra-high-speed image recording device according to claim 1, characterized in that: Also included is an electrostatic discharge detection sensor (6); The electrostatic discharge detection sensor (6) is used to generate a discharge detection signal after detecting electrostatic discharge; The synchronous trigger unit (2) is further configured to determine whether the discharge detection signal exceeds a preset trigger threshold when the discharge detection signal is acquired; If the discharge detection signal exceeds a preset trigger threshold, a first delay is performed for a set first time period, and then a first start signal, a second start signal and a third start signal are generated.

3. The electrostatic discharge ultra-high-speed image recording device according to claim 1, wherein: Also included is an electrostatic discharge generator (7); The electrostatic discharge generator (7) is used to perform electrostatic discharge at a set voltage and pulse width; and generate a discharge trigger signal after the electrostatic discharge; The synchronous trigger unit (2) is further used for delaying for a set first time length when a discharge trigger signal is obtained, and then generating a first start signal, a second start signal and a third start signal.

4. The electrostatic discharge ultra-high-speed image recording device according to any one of claims 1 to 3, characterized in that: Also includes a fault processing unit (8); The fault processing unit (8) is used to obtain the working status of the high-speed camera (3), the first rotating reflector (4), and the linear array camera (5); and when the working status of the high-speed camera (3), the first rotating reflector (4), or the linear array camera (5) is abnormal, the fault processing unit (8) is used to perform fault processing on the high-speed camera (3), the first rotating reflector (4), or the linear array camera (5) according to a preset fault processing scheme.

5. The electrostatic discharge ultra-high-speed image recording device according to claim 4, characterized in that: Also includes a second rotating reflector (9); The fault processing unit (8) is further configured to generate a reflector fault signal when the working state of the first rotating reflector (4) is abnormal; The synchronous trigger unit (2) is further configured to generate a first stop signal, a second stop signal and a third stop signal when a reflector fault signal is obtained; The high-speed camera (3), the first rotating reflector (4), and the linear array camera (5) are further configured to stop working when receiving a first stop signal, a second stop signal, and a third stop signal, respectively; The synchronous trigger unit (2) is further used for delaying for a set second time period when a reflector fault signal is obtained, and then generating a first start signal, a third start signal and a fourth start signal; The second rotating reflector (9) is used for reflecting the second discharge sub-beam and rotates at a set speed when receiving a fourth start signal.

6. The electrostatic discharge ultra-high-speed image recording device according to claim 5, characterized in that: Also included is a control unit (10); The control unit (10) is used to set parameters of the synchronous trigger unit (2), the high-speed camera (3), the first rotating reflector (4), the second rotating reflector (9), the linear array camera (5), and the electrostatic discharge generator (7) based on input parameter information or preset parameter information; The parameters of the synchronous trigger unit (2) include a first delay time, a second delay time, and a trigger threshold; The parameters of the high-speed camera (3) include frame rate, resolution and high-speed camera gain; The parameters of the first rotating reflector (4) and the second rotating reflector (9) include rotation speed, rotation duration and initial angle; The parameters of the line array camera (5) include field of view angle, line width, line frequency and line array camera gain; The parameters of the electrostatic discharge generator (7) include the voltage and pulse width of the electrostatic discharge.

7. The electrostatic discharge ultra-high-speed image recording device according to claim 6, characterized in that: The rotation speed satisfies the following formula: Where n is the rotation speed and t is the electrostatic discharge duration.

8. The electrostatic discharge ultra-high-speed image recording device according to any one of claims 1 to 3 and 5 to 7, characterized in that: Also includes an image processing unit (11); The image processing unit (11) is used to process the first discharge image and / or the second discharge image; The processing includes noise reduction, image enhancement and feature extraction.

9. The electrostatic discharge ultra-high-speed image recording device according to any one of claims 5 to 7, characterized in that: Also includes an alarm unit (12); The fault processing unit (8) is further configured to generate corresponding fault information based on a preset fault processing solution when the working state of the high-speed camera (3), the first rotating reflector (4) or the linear array camera (5) is abnormal; The alarm unit (12) is used to send the fault information to a remote end.

10. The electrostatic discharge ultra-high-speed image recording device according to claim 8, wherein: Also includes an electromagnetic shielding shell (13); The spectroscope (1), the synchronous trigger unit (2), the high-speed camera (3), the first rotating reflector (4), the linear array camera (5), the fault processing unit (8), the second rotating reflector (9) and the image processing unit (11) are all arranged in the electromagnetic shielding shell (13).

Images