A detection device of an SPD protector

Abstract

The utility model provides a kind of detection equipment of SPD protector, by being equipped with lightning stroke counting unit, lightning stroke recording unit and single-chip microcontroller, single-chip microcontroller is connected with lightning stroke counting unit, lightning stroke recording unit electricity respectively, lightning stroke counting unit includes first mutual inductor, and lightning stroke recording unit includes Rogowski coil, lightning stroke counting unit is used for when first current value is greater than preset surge value then output surge occurrence signal and record the output frequency of surge occurrence signal, lightning stroke recording unit is used for output surge waveform signal converted by second current value, single-chip microcontroller is used for when response surge occurrence signal triggers lightning stroke recording unit to obtain surge waveform signal and according to surge waveform signal output first alarm signal, and then improve the diversification evaluation capability and surge data capture capability of detection equipment, avoid the measurement window loss problem caused by response lag.

Description

Technical Field

[0001] This utility model relates to the field of media player technology, and in particular to a testing device for an SPD protector. Background Technology

[0002] Most existing SPD testing equipment only has the function of judging the degree of SPD protection device degradation by the number of surges. This makes the degradation judgment of current SPD testing equipment singular. The number of surges alone cannot quantify the nonlinear damage of surge energy to SPDs (such as MOV varistors and gas discharge tubes). At the same time, it lacks the ability to adaptively adjust to detect different types of SPD protection devices, and cannot accurately adapt to the detection requirements of different SPDs. Furthermore, the response speed of measurement data is slow, and it is easy for surge current to pass through but miss the measurement window. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a detection device for SPD protectors, which improves the diversified evaluation capability and surge data capture capability of the detection device, and avoids the problem of measurement window loss due to response lag.

[0004] To achieve the above objectives, a first aspect of this application provides a detection device for an SPD protector, comprising: A lightning strike counting unit, comprising a first current transformer, the first current transformer being used to detect a first current value between an electrical appliance and an SPD protector at a first detection frequency; The lightning strike recording unit includes a Rogowski coil, which is used to detect a second current value between the electrical appliance and the SPD protector at a second detection frequency, the second detection frequency being greater than the first detection frequency. The microcontroller is electrically connected to the lightning strike counting unit and the lightning strike recording unit, respectively. The lightning strike counting unit is used to output a surge signal and record the number of times the surge signal is output when the first current value is greater than the preset surge value. The lightning strike recording unit is used to output the surge waveform signal converted from the second current value. The microcontroller is used to trigger the lightning strike recording unit to obtain the surge waveform signal and output the first alarm signal according to the surge waveform signal when responding to the surge signal.

[0005] Furthermore, in some embodiments, the aforementioned detection device further includes a power frequency current detection unit, which is electrically connected to a microcontroller. The power frequency current detection unit includes a second current transformer and an energy meter, with the energy meter electrically connected to the second current transformer. The second current transformer is used to read, at a third detection frequency, the third current value, the voltage frequency value, and the leakage current value between the appliance and the SPD protector. The energy meter is used to output an energy metering signal based on the third current value, voltage frequency value, and leakage current value. The microcontroller is also used to output a second alarm signal based on the energy metering signal.

[0006] Furthermore, in some embodiments, the above-mentioned detection device also includes a temperature measuring unit, which is electrically connected to a microcontroller; the temperature measuring unit includes a temperature measuring terminal, which is used as a sensing component of the thermistor in the SPD protector to output the temperature signal of the thermistor, and the microcontroller is also used to output a third alarm signal based on the temperature signal.

[0007] Furthermore, in some embodiments, the above-mentioned detection device also includes a wireless communication unit, which serves as a wireless communication interface for the microcontroller and is electrically connected to the microcontroller.

[0008] Furthermore, in some embodiments, the above-mentioned detection device also includes a 485 serial communication unit, which is used as a wired communication interface for the microcontroller and is electrically connected to the microcontroller.

[0009] Furthermore, in some embodiments, the above-mentioned detection device also includes a switch quantity detection unit, which is electrically connected to a single-chip microcomputer and is used to detect the continuity between the electrical appliance and the SPD protector.

[0010] Furthermore, in some embodiments, the above-mentioned detection device also includes a relay control unit, which is electrically connected to the microcontroller; wherein, the relay control unit is used to control the relay to switch to interrupt the electrical connection between the electrical appliance and the SPD protector when it receives a first alarm signal, a second alarm signal or a third alarm signal from the microcontroller.

[0011] A detection device for an SPD protector according to an embodiment of the present invention has at least the following beneficial effects: It includes a lightning strike counting unit, a lightning strike recording unit, and a microcontroller. The microcontroller is electrically connected to the lightning strike counting unit and the lightning strike recording unit. The lightning strike counting unit includes a first current transformer, which is used to detect a first current value between the appliance and the SPD protector at a first detection frequency. The lightning strike recording unit includes a Rogowski coil, which is used to detect a second current value between the appliance and the SPD protector at a second detection frequency, where the second detection frequency is greater than the first detection frequency. Therefore, based on the lightning strike counting unit using the Rogowski coil, a complete surge waveform is captured in real time. Combined with the surge count statistics of the lightning strike counting unit, a multi-dimensional degradation assessment model is constructed. This system enhances the versatility of the testing equipment and improves the surge data capture rate by using a Rogowski coil-based high-frequency sampling method. It avoids the problem of measurement window loss due to response lag. Meanwhile, the lightning strike counting unit outputs a surge signal and records the number of times the surge signal is output when the first current value is greater than the preset surge value. The lightning strike recording unit outputs the surge waveform signal converted from the second current value. The microcontroller triggers the lightning strike recording unit to acquire the surge waveform signal when responding to the surge signal and outputs the first alarm signal based on the surge waveform signal. Furthermore, based on the microcontroller's dynamic sampling strategy, it achieves adaptive detection compatibility for different types of SPD protectors, improving the adaptability of the testing equipment.

[0012] Other features and advantages of this invention will be set forth in the following description and will be apparent in part from the description. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a structural diagram of the detection device for the SPD protector provided in some embodiments of this utility model; Figure 2 This is a circuit diagram of the detection device provided in some embodiments of the present invention, connected between the SPD protector and the air switch; Figure 3 This is a circuit connection block diagram of the detection device for the SPD protector provided in some embodiments of this utility model.

[0015] Reference numerals: Detection device 100, lightning strike counting unit 110, first current transformer 111, lightning strike recording unit 120, Rogowski coil 121, microcontroller 130, power frequency current detection unit 140, second current transformer 141, temperature measuring unit 150, temperature measuring terminal 151, wireless communication unit 160, 485 serial communication unit 170, switch quantity detection unit 180, relay control unit 190; Air switch 200, SPD protector 210. Detailed Implementation

[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0017] In the description of this utility model, the use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0018] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0019] Most existing SPD testing equipment only has the function of judging the degree of SPD protection device degradation by the number of surges. This makes the degradation judgment of current SPD testing equipment singular. The number of surges alone cannot quantify the nonlinear damage of surge energy to SPDs (such as MOV varistors and gas discharge tubes). At the same time, it lacks the ability to adaptively adjust to detect different types of SPD protection devices, and cannot accurately adapt to the detection requirements of different SPDs. Furthermore, the response speed of measurement data is slow, and it is easy for surge current to pass through but miss the measurement window.

[0020] Based on this, the present invention provides a detection device for SPD protectors, which can improve the diverse evaluation capabilities and surge data capture capabilities of the detection device, and avoid the problem of measurement window loss due to response lag.

[0021] Firstly, referring to Figures 1 to 3 As shown, Figure 1 This is a structural diagram of a testing device for an SPD protector provided in some embodiments of this utility model. Figure 2 This is a circuit diagram showing the connection between the detection device provided in some embodiments of this utility model and the SPD protector and the air switch. Figure 3 This is a circuit connection block diagram of the detection device for the SPD protector provided in some embodiments of this utility model, wherein, Figure 2 The air switch 200 serves as a connection interface for electrical appliances. The detection device 100 includes a lightning strike counting unit 110, a lightning strike recording unit 120, and a microcontroller 130. The microcontroller 130 is electrically connected to the lightning strike counting unit 110 and the lightning strike recording unit 120. The lightning strike counting unit 110 includes a first current transformer 111, which is used to detect the first current value between the electrical appliance and the SPD protector 210 at a first detection frequency. The lightning strike recording unit 120 includes a Rogowski coil 121, which is used to detect the first current value between the electrical appliance and the SPD protector 210 at a first detection frequency. The second current value between the electrical appliance and the SPD protector 210 is detected at a second detection frequency. The second detection frequency is greater than the first detection frequency. The lightning strike counting unit 110 is used to output a surge signal and record the number of times the surge signal is output when the first current value is greater than the preset surge value. The lightning strike recording unit 120 is used to output the surge waveform signal obtained by converting the second current value. The microcontroller 130 is used to trigger the lightning strike recording unit 120 to obtain the surge waveform signal and output a first alarm signal according to the surge waveform signal when responding to the surge signal.

[0022] It should be noted that, based on the lightning strike counting unit 110 of the Rogowski coil 121 capturing the complete surge waveform in real time and combining the surge count statistics of the lightning strike counting unit 110, a multi-dimensional degradation evaluation model is constructed, which improves the diversified evaluation capability of the detection device 100. Furthermore, based on the high-frequency sampling method of the Rogowski coil 121, the surge data capture rate of the detection device 100 is improved, avoiding the problem of measurement window loss due to response lag. In addition, through the dynamic sampling strategy based on the microcontroller 130 and the lightning strike counting unit 110 and the lightning strike recording unit 120 respectively, adaptive detection compatibility of different types of SPD protectors 210 is achieved, improving the adaptability of the detection device 100.

[0023] In one possible embodiment, the lightning strike recording unit 120 has a sampling rate of 2MHz, and a surge current of 8µs can be tested to collect 20 data points.

[0024] It should also be noted that the lightning strike counting unit 110 is also used to send the number of surge occurrence signals to the microcontroller 130. The microcontroller 130 compares the preset remaining surge withstand count of the SPD protector 210 with the output count. If the count exceeds the set threshold, a fourth alarm signal is output. Furthermore, the lightning strike counting unit 110 can not only record the number of surges but also serve as the trigger source for the lightning strike recording unit 120, thus providing a double protection for surge current detection and avoiding the problem of measurement window loss due to response lag.

[0025] Furthermore, the aforementioned detection device 100 also includes a power frequency current detection unit 140, which is electrically connected to the microcontroller 130. The power frequency current detection unit 140 includes a second current transformer 141 and an energy meter, which is electrically connected to the second current transformer 141. The second current transformer 141 is used to read the third current value, voltage frequency value, and leakage current value between the appliance and the SPD protector 210 at a third detection frequency. The energy meter is used to output an energy metering signal based on the third current value, voltage frequency value, and leakage current value. The microcontroller 130 is also used to output a second alarm signal based on the energy metering signal.

[0026] It should be noted that, by setting up a power frequency current detection unit 140 electrically connected to the microcontroller 130, the second current transformer 141 accurately reads the third current value, voltage frequency value, and leakage current value between the appliance and the SPD protector at a third detection frequency. The energy meter connected to the unit outputs an energy metering signal based on these values, thereby enabling the microcontroller 130 to output a second alarm signal. This allows for real-time and accurate monitoring and analysis of power frequency current-related parameters in the circuit, timely detection of abnormalities in current, voltage, and leakage current, and alerting users through alarm signals. This effectively improves the accuracy and timeliness of circuit detection and enhances the safety protection capabilities of the circuit system and appliances.

[0027] Furthermore, the aforementioned detection device 100 also includes a temperature measuring unit 150, which is electrically connected to the microcontroller 130. The temperature measuring unit 150 includes a temperature measuring terminal 151, which is used as a sensing component of the thermistor in the SPD protector 210 to output the temperature signal of the thermistor. The microcontroller 130 is also used to output a third alarm signal based on the temperature signal, which helps to detect the temperature rise of the SPD protector 210 due to overheating or other abnormal conditions in a timely manner, provide early warning of potential fault risks, enhance the safety protection capability of the SPD protector 210 and the entire circuit system, effectively improve the stability and reliability of equipment operation, and reduce the probability of faults caused by the failure to detect abnormal temperatures in time.

[0028] Furthermore, the aforementioned testing device 100 also includes a wireless communication unit 160, which serves as a wireless communication interface for the microcontroller 130 and is electrically connected to the microcontroller 130. It should be noted that the wireless communication unit 160 can be a Wi-Fi communication unit, a Bluetooth communication unit, or an infrared communication unit; this invention does not impose any specific limitations.

[0029] Furthermore, the aforementioned testing device 100 also includes a 485 serial communication unit 170, which serves as a wired communication interface for the microcontroller 130 and is electrically connected to the microcontroller 130.

[0030] Furthermore, the aforementioned testing device 100 also includes a switch quantity detection unit 180, which is electrically connected to the microcontroller 130. The switch quantity detection unit 180 is used to detect the continuity between the electrical appliance and the SPD protector 210.

[0031] Furthermore, the aforementioned detection device 100 also includes a relay control unit 190, which is electrically connected to the microcontroller 130. The relay control unit 190 is used to control the relay to switch to interrupt the electrical connection between the appliance and the SPD protector 210 when it receives a first alarm signal, a second alarm signal, or a third alarm signal from the microcontroller 130.

[0032] It should be noted that the switch quantity detection unit 180 can monitor the continuity between the appliance and the SPD protector 210 in real time, providing a fast and direct connection status feedback mechanism for the device. Simultaneously, the close cooperation between the relay control unit 190 and the microcontroller 130 enables the device to respond quickly and control the relay to trip upon receiving any alarm signal (first, second, or third alarm signal), thereby promptly interrupting the electrical connection between the appliance and the SPD protector 210. This design not only enhances the device's emergency handling capability for potential faults but also effectively prevents further escalation of the fault. Through this proactive monitoring and rapid disconnection mechanism, the device can quickly take measures to protect the appliance and the SPD protector 210 from damage and extend the device's service life when abnormal situations occur.

[0033] It should be understood that in this utility model, "at least one (item)" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0034] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A detection device of an SPD protector, characterized in that, include: A lightning strike counting unit, the lightning strike counting unit including a first current transformer, the first current transformer being used to detect a first current value between the electrical appliance and the SPD protector at a first detection frequency; A lightning strike recording unit, the lightning strike recording unit including a Rogowski coil, the Rogowski coil being used to detect a second current value between the electrical appliance and the SPD protector at a second detection frequency, the second detection frequency being greater than the first detection frequency; A microcontroller is electrically connected to the lightning strike counting unit and the lightning strike recording unit, respectively. The lightning strike counting unit is used to output a surge signal and record the number of times the surge signal is output when the first current value is greater than a preset surge value. The lightning strike recording unit is used to output a surge waveform signal converted from the second current value. The microcontroller is used to trigger the lightning strike recording unit to obtain the surge waveform signal and output a first alarm signal according to the surge waveform signal when responding to the surge signal.

2. The detection device of claim 1, wherein, Also includes: A power frequency current detection unit is electrically connected to the microcontroller. The power frequency current detection unit includes a second current transformer and an energy meter, and the energy meter is electrically connected to the second current transformer. The second current transformer is used to read the third current value, voltage frequency value and leakage current value between the electrical appliance and the SPD protector at a third detection frequency. The energy meter is used to output an energy metering signal based on the third current value, the voltage frequency and the leakage current value. The microcontroller is also used to output a second alarm signal based on the energy metering signal.

3. The detection device of claim 2, wherein, Also includes: A temperature measuring unit, which is electrically connected to the single-chip microcomputer; The temperature measuring unit includes a temperature measuring terminal, which is used as a sensing component of the thermistor in the SPD protector to output the temperature signal of the thermistor. The microcontroller is also used to output a third alarm signal based on the temperature signal.

4. The detection device of claim 1, wherein, Also includes: A wireless communication unit is provided, which serves as the wireless communication interface of the microcontroller and is electrically connected to the microcontroller.

5. The detection device of claim 1, wherein, Also includes: A 485 serial communication unit is provided, which serves as a wired communication interface for the microcontroller and is electrically connected to the microcontroller.

6. The detection device of claim 1, wherein, Also includes: A switch quantity detection unit is electrically connected to the single-chip microcomputer and is used to detect the continuity between the electrical appliance and the SPD protector.

7. The detection device of claim 3, wherein, Also includes: A relay control unit, which is electrically connected to the microcontroller; The relay control unit is used to control the relay to switch to interrupt the electrical connection between the appliance and the SPD protector when it receives the first alarm signal, the second alarm signal or the third alarm signal from the microcontroller.

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