Multifunctional earth screen monitoring device and system

Abstract

The utility model discloses a multifunctional earth screen monitoring device which at least has the following beneficial effects: a power supply module; the control module is connected with the power supply module; the intelligent analysis module is connected with the control module, and the intelligent analysis module is used for obtaining the peak value, the wave head time, the wave tail time and the gradient of the lightning stroke current; and the lightning stroke current detection module is connected with the intelligent analysis module, and the lightning stroke current detection module is arranged on the earth screen main line and is used for obtaining the transient waveform of the lightning stroke current. According to the technical scheme of the embodiment, the lightning stroke type and the corrosion degradation trend of the ground screen can be effectively judged.

Description

Technical Field

[0001] This utility model relates to the field of ground grid monitoring technology, and in particular to a multifunctional ground grid monitoring device and system. Background Technology

[0002] Traditional grounding resistance testers can only measure basic grounding resistance. They cannot simultaneously detect the connection status between the down conductor and the grounding grid, power frequency current leakage, and lightning current characteristics. They cannot reflect the changes in the grounding grid status after a lightning strike in real time, and lack in-depth analysis of waveform characteristics (such as wavefront time and steepness). It is difficult to determine the type of lightning strike (direct lightning / induced lightning) and the trend of grounding grid corrosion and deterioration. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a multifunctional grounding grid monitoring device and system, capable of effectively determining the type of lightning strike and the trend of grounding grid corrosion and deterioration.

[0004] On one hand, the multifunctional grounding grid monitoring device according to an embodiment of the present utility model includes:

[0005] Power supply module;

[0006] A control module, which is connected to the power supply module;

[0007] The intelligent analysis module is connected to the control module and is used to obtain the peak value, wavefront time, wave tail time and steepness of the lightning strike current.

[0008] A lightning current detection module is provided, which is connected to the intelligent analysis module. The lightning current detection module is installed on the main line of the grounding grid and is used to acquire the transient waveform of the lightning current.

[0009] According to some embodiments of this utility model, the lightning current detection module includes a temperature acquisition unit, a first lightning current acquisition unit, an impedance acquisition unit, and a second lightning current acquisition unit, all of which are connected to the intelligent analysis module.

[0010] According to some embodiments of this utility model, the power supply module includes a first chip, a first sliding rheostat, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, a first diode, and a first transformer. One end of the first sliding rheostat is connected to one end of the first resistor, and one end of the second sliding rheostat is connected to one end of the second resistor. The other end of the first resistor and one end of the first capacitor are both connected to the first end of the first chip. The other end of the second resistor and the other end of the second capacitor are both connected to the second end of the first chip. One end of the second capacitor and the cathode of the first diode are respectively connected to the third end of the first chip and the first end of the first transformer. The other end of the second capacitor and the anode of the first diode are respectively connected to the fourth end of the first chip and the second end of the first transformer. An external power supply is connected to the third end of the first transformer and one end of the third capacitor. The fourth end of the first transformer and the other end of the third capacitor are grounded.

[0011] According to some embodiments of this utility model, the temperature acquisition module includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, and a first operational amplifier. One end of the third resistor and one end of the fourth capacitor are both connected to one end of the fourth resistor. One end of the fifth resistor and one end of the sixth resistor are both connected to one end of the fifth resistor. The other end of the fourth resistor, one end of the fifth capacitor, and one end of the eighth resistor are all connected to the first end of the first operational amplifier. The other end of the fifth resistor, one end of the seventh capacitor, and the other end of the fifth capacitor are all connected to the second end of the first operational amplifier. The other end of the seventh resistor is grounded. The other end of the eighth resistor and the third end of the first operational amplifier are both connected to one end of the ninth resistor. The other end of the ninth resistor and one end of the seventh capacitor are both connected to the tenth resistor. The other end of the seventh capacitor is grounded. One end of the sixth capacitor is connected to the fourth end of the first operational amplifier, and the other end of the sixth capacitor is grounded.

[0012] According to some embodiments of this utility model, the first lightning current acquisition unit includes a second chip, an eleventh resistor, a twelfth resistor, a thirteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, and a twelfth capacitor. One end of the eleventh resistor is connected to an external power supply. The other end of the eleventh resistor and one end of the eighth capacitor are connected to the first end of the second chip. The other end of the eighth capacitor is grounded. One end of the ninth capacitor and one end of the tenth capacitor are both connected to the second end of the second chip. The other ends of the ninth capacitor and the tenth capacitor are both connected to the third end of the second chip. One end of the eleventh capacitor is connected to the fourth end of the second chip. One end of the twelfth capacitor is connected to the fifth end of the second chip. The other ends of the eleventh capacitor and the twelfth capacitor are both grounded. One end of the twelfth resistor is connected to the fifth end of the second chip. One end of the thirteenth resistor is connected to the sixth end of the second chip. The other ends of the twelfth resistor and the thirteenth resistor are both grounded.

[0013] According to some embodiments of this utility model, the second lightning current acquisition unit includes a first communication base, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a second operational amplifier, a third operational amplifier, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, and a sixteenth capacitor. One end of the fourteenth resistor is connected to the communication base, and the other end of the fourteenth resistor is connected to one end of the fifteenth resistor. The other end of the fifteenth resistor, one end of the thirteenth capacitor, and one end of the sixteenth resistor are all connected to the first terminal of the second operational amplifier. The other end of the thirteenth capacitor, the other end of the sixteenth resistor, and the second terminal of the second operational amplifier are all connected to one end of the sixteenth capacitor. One end of the seventeenth resistor is connected to the first... The third terminal of the second operational amplifier is connected to the first terminal of the third operational amplifier, and the other terminal of the seventeenth resistor is grounded. One end of the fourteenth capacitor is connected to the fourth terminal of the second operational amplifier, and the other end of the fourteenth capacitor is grounded. One end of the fifteenth capacitor is connected to the fifth terminal of the second operational amplifier, and the other end of the fifteenth capacitor is grounded. One end of the sixteenth capacitor and one end of the eighteenth resistor are both connected to the first terminal of the third operational amplifier, and the other end of the eighteenth resistor is grounded. One end of the nineteenth resistor and one end of the twentieth resistor are both connected to the second terminal of the third operational amplifier, and the other end of the nineteenth resistor is grounded. The other end of the twentieth resistor and one end of the twenty-first resistor are both connected to the third terminal of the third operational amplifier, and the other end of the twenty-first resistor is connected to the impedance acquisition unit.

[0014] According to some embodiments of this utility model, the impedance acquisition unit includes a fourth operational amplifier, a fifth operational amplifier, a sixth operational amplifier, a seventh operational amplifier, an eighth operational amplifier, a second sliding rheostat, a twenty-second resistor, a twenty-third resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-seventh resistor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, and a twenty-third capacitor. The twenty-second resistor is connected to the first terminal of the fourth operational amplifier. One end of the seventeenth capacitor is connected to the second terminal of the fourth operational amplifier, and the other end of the seventeenth capacitor is grounded. The third terminal of the fourth operational amplifier is connected to one end of the twenty-third resistor, and the other end of the twenty-third resistor is connected to the first terminal of the first sliding rheostat. One end of the eighteenth capacitor and one end of the nineteenth capacitor are both connected to the second terminal of the second sliding rheostat. The third terminal of the second sliding rheostat is connected to one end of the twenty-fourth resistor, and the other end of the twenty-fourth resistor is grounded. The other end of the nineteenth capacitor and one end of the twenty-fifth resistor are both connected to the first terminal of the fifth operational amplifier. The other end of the eighteenth capacitor, the other end of the twenty-fifth resistor, and... One end of the 26th resistor and the second end of the fifth operational amplifier are both connected to the first end of the sixth operational amplifier. The other end of the 26th resistor is grounded. One end of the 27th resistor and one end of the 28th resistor are both connected to the second end of the sixth operational amplifier. The other end of the 27th resistor is grounded. The other end of the 28th resistor is connected to one end of the 29th resistor. One end of the 30th resistor is connected to the third end of the sixth operational amplifier. The other ends of the 29th resistor, the 30th resistor, and the 31st resistor are all connected to one end of the 33rd resistor. The other end of the 27th resistor is grounded. The other end of the 29th resistor... One end of the 30th resistor, the other end of the 31st resistor, and one end of the 33rd resistor are all connected to one end of the 32nd resistor. The other end of the 32nd resistor is grounded. The other end of the 33rd resistor and one end of the 34th resistor are all connected to one end of the 35th resistor. The other end of the 35th resistor is connected to one end of the 20th capacitor and one end of the 21st capacitor. The other ends of the 20th capacitor, the 21st capacitor, and one end of the 36th resistor are all connected to the first end of the seventh operational amplifier. The other end of the 36th resistor is connected to the eighth operational amplifier.The second and third terminals of the seventh operational amplifier are both connected to one end of the thirty-seventh resistor, one end of the twenty-second capacitor and one end of the twenty-third capacitor are both connected to the other end of the thirty-seventh resistor, and the other ends of the twenty-second and twenty-third capacitors are both grounded.

[0015] Secondly, embodiments of this utility model provide a multifunctional grounding grid monitoring system, comprising:

[0016] The multifunctional grounding grid monitoring device as described in the first aspect embodiment above.

[0017] The multifunctional ground grid monitoring device according to the embodiments of this utility model has at least the following beneficial effects:

[0018] The system includes: a power supply module; a control module connected to the power supply module; an intelligent analysis module connected to the control module, used to acquire the peak value, wavefront time, wave tail time, and steepness of the lightning strike current; and a lightning strike current detection module connected to the intelligent analysis module, installed on the main line of the grounding grid, used to acquire the transient waveform of the lightning strike current. According to the technical solution of this embodiment, the type of lightning strike and the trend of grounding grid corrosion deterioration can be effectively determined.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the principle of the multifunctional ground grid monitoring device according to an embodiment of the present utility model;

[0022] Figure 2 This is a circuit diagram of the power supply module according to an embodiment of the present utility model;

[0023] Figure 3 This is a circuit diagram of the temperature acquisition module according to an embodiment of the present utility model;

[0024] Figure 4 This is a circuit diagram of the first lightning current acquisition unit according to an embodiment of the present utility model;

[0025] Figure 5 This is a circuit diagram of the second lightning current acquisition unit according to an embodiment of the present invention;

[0026] Figure 6This is a circuit diagram of the impedance acquisition unit according to an embodiment of the present invention. Detailed Implementation

[0027] 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.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] 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.

[0030] Reference Figures 1 to 5 This utility model provides a multifunctional grounding grid monitoring device, including a power supply module; a control module connected to the power supply module; an intelligent analysis module connected to the control module, used to acquire the peak value, wavefront time, wave tail time, and steepness of the lightning strike current; and a lightning strike current detection module connected to the intelligent analysis module, installed on the main line of the grounding grid, used to acquire the transient waveform of the lightning strike current. According to the technical solution of this embodiment, the type of lightning strike and the trend of grounding grid corrosion deterioration can be effectively determined.

[0031] It should be noted that the power supply module provides a stable power supply to the entire monitoring device, ensuring the normal operation of each module and serving as the fundamental guarantee for the stable operation of the device. The control module, as the core hub of the device, is connected to the power supply module and is used to coordinate and control the operation of each module. It can receive information from other modules, process and analyze this information according to preset programs and algorithms, and then issue corresponding commands to control the operation of other modules, ensuring the efficient and orderly operation of the entire monitoring device. The intelligent analysis module is connected to the control module and can obtain key parameters such as the peak value, wavefront time, wave tail time, and steepness of the lightning current from the lightning current detection module. These parameters are crucial for accurately assessing the impact of lightning strikes on the grounding grid. By accurately analyzing this data, we can gain a deeper understanding of the characteristics and intensity of lightning strikes, providing a scientific basis for subsequent protective measures. The lightning current detection module is located on the main line of the grounding grid and can directly acquire the transient waveform of the lightning current. This direct detection method can maximize the accuracy and timeliness of the detection data, providing high-quality raw data for the intelligent analysis module.

[0032] The lightning current detection module includes a temperature acquisition unit, a first lightning current acquisition unit, an impedance acquisition unit, and a second lightning current acquisition unit. All three units are connected to the intelligent analysis module.

[0033] It should be noted that lightning strikes generate heat in the grounding grid, causing temperature changes. The temperature acquisition unit monitors the grounding grid temperature in real time and transmits the temperature data to the intelligent analysis module. By analyzing temperature changes, the thermal effect of the lightning current can be indirectly understood, determining whether the grounding grid has overheated due to lightning strikes, and the potential impact of overheating on equipment and lines. The first lightning current acquisition unit directly collects relevant data on the lightning current, such as current amplitude and waveform, and transmits it to the intelligent analysis module. The impedance acquisition unit monitors the impedance changes of the grounding grid in real time and feeds the data back to the intelligent analysis module. By analyzing the impedance data, it is possible to understand whether the grounding effect of the grounding grid is good, and whether there are impedance increases due to corrosion, damage, or other reasons, thus promptly identifying potential defects in the grounding grid. The second lightning current acquisition unit supplements the first lightning current acquisition unit, acquiring lightning current data from different locations or using different acquisition methods.

[0034] The power supply module includes a first chip, a first sliding rheostat, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, a first diode, and a first transformer. One end of the first sliding rheostat is connected to one end of the first resistor, and one end of the second sliding rheostat is connected to one end of the second resistor. The other end of the first resistor and one end of the first capacitor are both connected to the first end of the first chip. The other end of the second resistor and the other end of the second capacitor are both connected to the second end of the first chip. One end of the second capacitor and the cathode of the first diode are respectively connected to the third end of the first chip and the first end of the first transformer. The other end of the second capacitor and the anode of the first diode are respectively connected to the fourth end of the first chip and the second end of the first transformer. An external power supply is connected to the third end of the first transformer and one end of the third capacitor. The fourth end of the first transformer and the other end of the third capacitor are grounded.

[0035] It should be noted that the first sliding rheostat is connected in series with the first resistor, and the second sliding rheostat is connected in series with the second resistor. By adjusting the resistance value of the sliding rheostat, the voltage input to the first chip can be changed. This allows the power supply module to flexibly adjust the output voltage according to actual needs to adapt to the power supply voltage requirements of different loads, improving the versatility and adaptability of the power supply module. The first, second, and third capacitors play a filtering role in the circuit. Capacitors can store and release charge, filter the AC components in the power supply, and smooth voltage fluctuations. The first and second capacitors are connected to the two ends of the first chip respectively, which can reduce high-frequency noise in the chip's input voltage and provide a stable DC power supply for the chip. The third capacitor is connected to the output terminal of the first transformer to further filter the output voltage and improve its stability. The first diode acts as a rectifier, converting AC to DC. The first transformer can realize voltage transformation. Through an external power input, the transformer can convert the input voltage into a suitable output voltage to meet the operating requirements of the first chip and other loads.

[0036] The temperature acquisition module includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, and a first operational amplifier. One end of the third resistor and one end of the fourth capacitor are both connected to one end of the fourth resistor. One end of the fifth resistor and one end of the sixth resistor are both connected to one end of the fifth resistor. The other end of the fourth resistor, one end of the fifth capacitor, and one end of the eighth resistor are all connected to the first terminal of the first operational amplifier. The other end of the fifth resistor, one end of the seventh capacitor, and the other end of the seventh capacitor are all connected to the second terminal of the first operational amplifier. The other end of the seventh resistor is grounded. The other end of the eighth resistor and the third terminal of the first operational amplifier are both connected to one end of the ninth resistor. The other end of the ninth resistor and one end of the seventh capacitor are both connected to the tenth resistor. The other end of the seventh capacitor is grounded. One end of the sixth capacitor is connected to the fourth terminal of the first operational amplifier. The other end of the sixth capacitor is grounded.

[0037] It should be noted that the third, fourth, fifth, and sixth resistors constitute the input circuit, allowing for flexible adjustment of the input impedance and voltage division ratio to adapt to different types of temperature sensor signal sources. Different temperature sensors have varying output signal amplitudes and characteristics; by appropriately selecting the resistance values ​​of these resistors, the module can be well-matched to various sensors, enhancing its versatility and compatibility. The fourth, fifth, sixth, and seventh capacitors constitute a multi-stage filtering circuit. Capacitors have the characteristic of passing AC and blocking DC, effectively filtering out high-frequency noise interference in temperature signals. The seventh resistor is grounded, providing a stable DC bias for the operational amplifier. A stable DC bias is fundamental for the normal operation of the operational amplifier, ensuring stable amplification under different input signal conditions, avoiding zero-point drift and improving circuit stability and reliability. The sixth capacitor is connected to the power supply terminal of the operational amplifier and grounded, serving as a power supply decoupling agent. It eliminates high-frequency noise and ripple in the power supply, providing a clean and stable power supply for the operational amplifier.

[0038] The first lightning current acquisition unit includes a second chip, an eleventh resistor, a twelfth resistor, a thirteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, and a twelfth capacitor. One end of the eleventh resistor is connected to an external power supply, and the other end of the eleventh resistor and one end of the eighth capacitor are connected to the first end of the second chip. The other end of the eighth capacitor is grounded. One end of the ninth capacitor and one end of the tenth capacitor are both connected to the second end of the second chip. The other ends of the ninth capacitor and the tenth capacitor are both connected to the third end of the second chip. One end of the eleventh capacitor is connected to the fourth end of the second chip. One end of the twelfth capacitor is connected to the fifth end of the second chip. The other ends of the eleventh capacitor and the twelfth capacitor are both grounded. One end of the twelfth resistor is connected to the fifth end of the second chip. One end of the thirteenth resistor is connected to the sixth end of the second chip. The other ends of the twelfth resistor and the thirteenth resistor are both grounded.

[0039] It should be noted that the circuit consisting of the eleventh resistor and the eighth capacitor serves to limit current and filter signals. The eleventh resistor limits the current flowing into the second chip, preventing excessive current from damaging it. The ninth and tenth capacitors are connected between different pins of the second chip, which helps to condition the acquired lightning current signal, such as improving the signal's phase and frequency characteristics, making the signal more suitable for subsequent processing. They also provide some filtering, further removing noise and improving signal quality. The eleventh and twelfth capacitors are connected to different pins of the second chip and grounded. These two capacitors act as bypass capacitors, bypassing high-frequency noise on the second chip pins to ground, preventing noise from propagating inside the second chip, thereby improving the stability and reliability of the second chip's operation.

[0040] The second lightning current acquisition unit includes a first communication base, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth, twentieth, and twenty-first resistors, a second operational amplifier, a third operational amplifier, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, and a sixteenth capacitor. One end of the fourteenth resistor is connected to the communication base, and the other end of the fourteenth resistor is connected to one end of the fifteenth resistor. The other end of the fifteenth resistor, one end of the thirteenth capacitor, and one end of the sixteenth resistor are both connected to the first terminal of the second operational amplifier. The other end of the thirteenth capacitor, the other end of the sixteenth resistor, and the second terminal of the second operational amplifier are all connected to one end of the sixteenth capacitor. One end of the seventeenth resistor is connected to the second operational amplifier. The third terminal of the operational amplifier is connected to the first terminal, the other end of the seventeenth resistor is grounded, one end of the fourteenth capacitor is connected to the fourth terminal of the second operational amplifier, and the other end of the fourteenth capacitor is grounded, one end of the fifteenth capacitor is connected to the fifth terminal of the second operational amplifier, and the other end of the fifteenth capacitor is grounded, one end of the sixteenth capacitor and one end of the eighteenth resistor are both connected to the first terminal of the third operational amplifier, and the other end of the eighteenth resistor is grounded, one end of the nineteenth resistor and one end of the twentieth resistor are both connected to the second terminal of the third operational amplifier, and the other end of the nineteenth resistor is grounded, the other end of the twentieth resistor and one end of the twenty-first resistor are both connected to the third terminal of the third operational amplifier, and the other end of the twenty-first resistor is connected to the impedance acquisition unit.

[0041] It should be noted that the first communication connector serves as the connection interface with an external signal source (such as a lightning current sensor), facilitating the acquisition of lightning current signals. The fourteenth resistor functions as a current limiter and impedance matcher, preventing excessive current from damaging subsequent circuits and ensuring better matching between the signal source and the circuit, thus guaranteeing signal transmission stability. The fifteenth resistor, thirteenth capacitor, and sixteenth resistor form a voltage divider and filter circuit. The fifteenth resistor participates in the voltage divider, providing a suitable input voltage for the second operational amplifier; the thirteenth capacitor filters the signal, removing high-frequency noise interference; the second operational amplifier performs the first stage amplification of the pre-processed lightning current signal. By appropriately setting the parameters of components such as the seventeenth resistor, the amplifier gain can be adjusted to amplify the weak lightning current signal to a suitable amplitude. The fourteenth and fifteenth capacitors are connected to different pins of the second operational amplifier and grounded, acting as bypass capacitors. The third operational amplifier further processes and amplifies the signal after the first stage amplification. Components such as the eighteenth, nineteenth, and twentieth resistors work together to provide suitable input and feedback conditions for the third operational amplifier, further optimizing the signal's amplitude, phase, and other characteristics, improving signal quality and accuracy. The twenty-first resistor outputs the processed signal to the impedance acquisition unit. The twenty-first resistor serves to isolate and limit current, preventing signal interference during transmission and protecting the impedance acquisition unit from excessive current, thus ensuring the stable operation of the entire monitoring system.

[0042] The impedance acquisition unit includes a fourth operational amplifier, a fifth operational amplifier, a sixth operational amplifier, a seventh operational amplifier, an eighth operational amplifier, a second sliding rheostat, a twenty-second resistor, a twenty-third resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-seventh resistor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, and a twenty-third capacitor. The twenty-second resistor is connected to the first terminal of the fourth operational amplifier, and one terminal of the seventeenth capacitor is connected to the fourth operational amplifier. The second terminal of the amplifier is connected to the ground; the other terminal of the seventeenth capacitor is grounded; the third terminal of the fourth operational amplifier is connected to one end of the twenty-third resistor; the other end of the twenty-third resistor is connected to the first terminal of the first sliding rheostat; one end of the eighteenth capacitor and one end of the nineteenth capacitor are both connected to the second terminal of the second sliding rheostat; the third terminal of the second sliding rheostat is connected to one end of the twenty-fourth resistor; the other end of the twenty-fourth resistor is grounded; the other end of the nineteenth capacitor and one end of the twenty-fifth resistor are both connected to the first terminal of the fifth operational amplifier; the other end of the eighteenth capacitor, the other end of the twenty-fifth resistor, one end of the twenty-sixth resistor, and the second terminal of the fifth operational amplifier are all connected to the first terminal of the sixth operational amplifier. The other end of resistor 26 is grounded. One end of resistor 27 and one end of resistor 28 are both connected to the second terminal of the sixth operational amplifier. The other end of resistor 27 is grounded. The other end of resistor 28 is connected to one end of resistor 29. One end of resistor 30 is connected to the third terminal of the sixth operational amplifier. The other ends of resistors 29, 30, and 31 are all connected to one end of resistor 33. The other end of resistor 27 is grounded. The other ends of resistors 29, 30, and 31 are all connected to one end of resistor 33. The other end of resistor 31 is connected to one end of resistor 32. The other end of resistor 12 is grounded. The other end of resistor 33 and one end of resistor 34 are both connected to one end of resistor 35. The other end of resistor 35 is connected to one end of capacitor 20 and one end of capacitor 21, respectively. The other ends of capacitor 20 and one end of capacitor 21 and one end of resistor 36 are both connected to the first end of operational amplifier 7. The other end of resistor 36 is connected to operational amplifier 8. The second and third ends of operational amplifier 7 are both connected to one end of resistor 37. One end of capacitor 22 and one end of capacitor 23 are both connected to the other end of resistor 37. The other ends of capacitor 22 and one end of capacitor 23 are both grounded.

[0043] It should be noted that operational amplifiers numbered 4, 5, 6, 7, and 8 are used for multi-stage amplification and signal processing. Each operational amplifier stage can be configured with different gains to progressively amplify weak impedance signals, while simultaneously shaping and optimizing the signal to improve its quality and detectability. The presence of the second sliding rheostat allows for flexible adjustment of the circuit gain. In practical applications, different measurement scenarios may require different amplification factors. By adjusting the second sliding rheostat, the circuit gain can be adjusted according to specific circumstances to adapt to different impedance measurement ranges and accuracy requirements. Capacitors numbered 17, 18, 19, 20, 21, 22, and 23 act as filters in the circuit. Capacitors can selectively filter signals of different frequencies, removing high-frequency noise and interference. Resistors numbered 22, 23, 24, and 25 form a complex resistor network. These resistors not only perform voltage division to provide a suitable input voltage for the operational amplifiers but also provide impedance matching, making signal transmission between different stages more efficient and reducing signal reflection and distortion.

[0044] Secondly, this utility model embodiment also provides a multifunctional grounding grid detection system, including:

[0045] The multifunctional grounding grid monitoring device as described in the first aspect embodiment above.

[0046] In the description of this specification, references to terms such as "one embodiment," "further embodiment," "some specific embodiments," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multifunctional grounding grid monitoring device, characterized in that, include: Power supply module; A control module, which is connected to the power supply module; The intelligent analysis module is connected to the control module and is used to obtain the peak value, wavefront time, wave tail time and steepness of the lightning strike current. A lightning current detection module is provided, wherein the lightning current analysis module is connected to the intelligent analysis module, and the lightning current detection module is installed on the main line of the grounding grid to obtain the transient waveform of the lightning current.

2. The multifunctional ground grid monitoring device according to claim 1, characterized in that, The lightning current detection module includes a temperature acquisition unit, a first lightning current acquisition unit, an impedance acquisition unit, and a second lightning current acquisition unit, all of which are connected to the intelligent analysis module.

3. The multifunctional grounding grid monitoring device according to claim 1, characterized in that, The power supply module includes a first chip, a first sliding rheostat, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, a first diode, and a first transformer. One end of the first sliding rheostat is connected to one end of the first resistor, and one end of the second sliding rheostat is connected to one end of the second resistor. The other end of the first resistor and one end of the first capacitor are both connected to the first end of the first chip. The other end of the second resistor and the other end of the second capacitor are both connected to the second end of the first chip. One end of the second capacitor and the cathode of the first diode are respectively connected to the third end of the first chip and the first end of the first transformer. The other end of the second capacitor and the anode of the first diode are respectively connected to the fourth end of the first chip and the second end of the first transformer. An external power supply is connected to the third end of the first transformer and one end of the third capacitor. The fourth end of the first transformer and the other end of the third capacitor are grounded.

4. The multifunctional grounding grid monitoring device according to claim 2, characterized in that, The temperature acquisition module includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, and a first operational amplifier. One end of the third resistor and one end of the fourth capacitor are both connected to one end of the fourth resistor. One end of the fifth resistor and one end of the sixth resistor are both connected to one end of the fifth resistor. The other end of the fourth resistor, one end of the fifth capacitor, and one end of the eighth resistor are all connected to the first terminal of the first operational amplifier. The other end of the fifth resistor, one end of the seventh capacitor, and the other end of the fifth capacitor are all connected to the second terminal of the first operational amplifier. The other end of the seventh resistor is grounded. The other end of the eighth resistor and the third terminal of the first operational amplifier are both connected to one end of the ninth resistor. The other end of the ninth resistor and one end of the seventh capacitor are both connected to the tenth resistor. The other end of the seventh capacitor is grounded. One end of the sixth capacitor is connected to the fourth terminal of the first operational amplifier, and the other end of the sixth capacitor is grounded.

5. The multifunctional grounding grid monitoring device according to claim 2, characterized in that, The first lightning current acquisition unit includes a second chip, an eleventh resistor, a twelfth resistor, a thirteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, and a twelfth capacitor. One end of the eleventh resistor is connected to an external power supply. The other end of the eleventh resistor and one end of the eighth capacitor are connected to the first end of the second chip. The other end of the eighth capacitor is grounded. One end of the ninth capacitor and one end of the tenth capacitor are both connected to the second end of the second chip. The other ends of the ninth capacitor and the tenth capacitor are both connected to the third end of the second chip. One end of the eleventh capacitor is connected to the fourth end of the second chip. One end of the twelfth capacitor is connected to the fifth end of the second chip. The other ends of the eleventh capacitor and the twelfth capacitor are both grounded. One end of the twelfth resistor is connected to the fifth end of the second chip. One end of the thirteenth resistor is connected to the sixth end of the second chip. The other ends of the twelfth resistor and the thirteenth resistor are both grounded.

6. The multifunctional grounding grid monitoring device according to claim 2, characterized in that, The second lightning current acquisition unit includes a first communication socket, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a second operational amplifier, a third operational amplifier, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, and a sixteenth capacitor. One end of the fourteenth resistor is connected to the communication socket, and the other end of the fourteenth resistor is connected to one end of the fifteenth resistor. The other end of the fifteenth resistor, one end of the thirteenth capacitor, and one end of the sixteenth resistor are all connected to the first terminal of the second operational amplifier. The other end of the thirteenth capacitor, the other end of the sixteenth resistor, and the second terminal of the second operational amplifier are all connected to one end of the sixteenth capacitor. One end of the seventeenth resistor is connected to the second operational amplifier... The third terminal is connected, the other end of the seventeenth resistor is grounded, one end of the fourteenth capacitor is connected to the fourth terminal of the second operational amplifier, and the other end of the fourteenth capacitor is grounded, one end of the fifteenth capacitor is connected to the fifth terminal of the second operational amplifier, and the other end of the fifteenth capacitor is grounded, one end of the sixteenth capacitor and one end of the eighteenth resistor are both connected to the first terminal of the third operational amplifier, and the other end of the eighteenth resistor is grounded, one end of the nineteenth resistor and one end of the twentieth resistor are both connected to the second terminal of the third operational amplifier, and the other end of the nineteenth resistor is grounded, the other end of the twentieth resistor and one end of the twenty-first resistor are both connected to the third terminal of the third operational amplifier, and the other end of the twenty-first resistor is connected to the impedance acquisition unit.

7. The multifunctional grounding grid monitoring device according to claim 2, characterized in that, The impedance acquisition unit includes a fourth operational amplifier, a fifth operational amplifier, a sixth operational amplifier, a seventh operational amplifier, an eighth operational amplifier, a second sliding rheostat, a twenty-second resistor, a twenty-third resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-seventh resistor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, and a twenty-third capacitor. The twenty-second resistor is connected to the first terminal of the fourth operational amplifier, and one terminal of the seventeenth capacitor is connected to the... The second terminal of the fourth operational amplifier is connected to the ground, the other terminal of the seventeenth capacitor is grounded, the third terminal of the fourth operational amplifier is connected to one end of the twenty-third resistor, the other end of the twenty-third resistor is connected to the first terminal of the first sliding rheostat, one end of the eighteenth capacitor and one end of the nineteenth capacitor are both connected to the second terminal of the second sliding rheostat, the third terminal of the second sliding rheostat is connected to one end of the twenty-fourth resistor, the other end of the twenty-fourth resistor is grounded, the other end of the nineteenth capacitor and one end of the twenty-fifth resistor are both connected to the first terminal of the fifth operational amplifier, and the other end of the eighteenth capacitor, the other end of the twenty-fifth resistor, and the twenty-sixth resistor are connected to the ground. One end of the 26th resistor and the second end of the fifth operational amplifier are both connected to the first end of the sixth operational amplifier. The other end of the 27th resistor and the 28th resistor are both connected to the second end of the sixth operational amplifier. The other end of the 27th resistor is grounded. The other end of the 28th resistor is connected to one end of the 29th resistor. One end of the 30th resistor is connected to the third end of the sixth operational amplifier. The other ends of the 29th resistor, the 30th resistor, and the 31st resistor are all connected to one end of the 33rd resistor. The other end of the 27th resistor is grounded. The other end of the 29th resistor... The other end of the thirtieth resistor and one end of the thirty-first resistor are both connected to one end of the thirty-third resistor. The other end of the thirty-first resistor is connected to one end of the thirty-second resistor. The other end of the thirty-second resistor is grounded. The other end of the thirty-third resistor and one end of the thirty-fourth resistor are both connected to one end of the thirty-fifth resistor. The other end of the thirty-fifth resistor is connected to one end of the twentieth capacitor and one end of the twenty-first capacitor, respectively. The other ends of the twentieth capacitor, the twenty-first capacitor, and one end of the thirty-sixth resistor are all connected to the first terminal of the seventh operational amplifier. The other end of the thirty-sixth resistor is connected to the eighth operational amplifier.The second and third terminals of the seventh operational amplifier are both connected to one end of the thirty-seventh resistor, one end of the twenty-second capacitor and one end of the twenty-third capacitor are both connected to the other end of the thirty-seventh resistor, and the other ends of the twenty-second and twenty-third capacitors are both grounded.

8. A multifunctional grounding grid monitoring system, characterized in that, include: The multifunctional grounding network monitoring device as described in any one of claims 1 to 7.

Images