A high-energy surge absorption monitoring counter circuit and apparatus

Abstract

The utility model discloses a kind of high-energy surge absorption monitoring counting circuit and equipment, power supply is transformed into direct current for operating amplifier circuit, single-chip microcomputer circuit and display circuit use by transformer circuit, overvoltage on direct current power line is attenuated and input single-chip microcomputer circuit after direct current bias by operating amplifier circuit, the magnitude of power voltage is monitored in real time by single-chip microcomputer circuit, whether the action of direct current lightning arrester is judged, when direct current lightning arrester acts, record action frequency, action time and the maximum voltage amplitude within action one millisecond, and display is carried out by display circuit, both realize the action counting of direct current lightning arrester, also realize the thunderstorm frequency record of passing through direct current lightning arrester, solve the existing 24V / 48V direct current lightning arrester without action counting function, also cannot record the technical problem of thunderstorm frequency.

Description

Technical Field

[0001] This utility model relates to the field of power electronic instrument technology, and in particular to a high-energy surge absorption monitoring and counting circuit and device. Background Technology

[0002] DC surge arresters are one of the important power protection devices in electronic information systems. However, existing 24V / 48V DC surge arresters lack an operation counting function, making it impossible to record the operation status of the arrester and the frequency of thunderstorms. Utility Model Content

[0003] This invention provides a high-energy surge absorption monitoring and counting circuit and device to solve the technical problem that existing 24V / 48V DC surge arresters lack operation counting function and cannot record the frequency of thunderstorms.

[0004] In view of this, the first aspect of this utility model provides a high-energy surge absorption monitoring and counting circuit, including a transformer circuit, an operational amplifier circuit, a microcontroller circuit, and a display circuit;

[0005] The transformer circuit, operational amplifier circuit, and display circuit are respectively connected to the microcontroller circuit;

[0006] Transformer circuits are used to transform DC power into DC power for operational amplifier circuits, microcontroller circuits, and display circuits.

[0007] Operational amplifier circuits are used to attenuate overvoltages on DC power lines and input them to microcontroller circuits after DC biasing.

[0008] The microcontroller circuit is used to monitor the power supply voltage in real time and determine whether the DC surge arrester has been activated. When the DC surge arrester is activated, the number of activations, the activation time, and the maximum voltage amplitude within one millisecond of the activation are recorded.

[0009] The display circuit is used to display the number of times the DC surge arrester operates, the operating time, and the maximum voltage amplitude within one millisecond of the operation.

[0010] Optionally, the transformer circuit includes a BUCK step-down circuit, a linear regulator circuit, and a reference voltage circuit;

[0011] The BUCK step-down circuit is used to convert DC power supply voltage to 5V.

[0012] A linear voltage regulator circuit is used to convert 5V voltage to 3.3V voltage;

[0013] The reference voltage circuit is used to convert 3.3V to 2.5V.

[0014] Optionally, the BUCK step-down circuit includes a step-down DC-DC power management chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a Zener diode, and a first inductor.

[0015] One end of the first capacitor is connected to the DC power supply, and the other end of the first capacitor is grounded.

[0016] One end of the second capacitor is connected to the DC power supply, and the other end of the second capacitor is grounded.

[0017] One end of the third capacitor is connected to the DC power supply, and the other end of the third capacitor is connected to the VIA pin of the step-down DC-DC power management chip.

[0018] One end of the fourth capacitor is connected to the VS pin of the step-down DC-DC power management chip, and the other end of the fourth capacitor is connected to the VB pin of the step-down DC-DC power management chip.

[0019] One end of the first resistor is connected to the DC power supply, and the other end of the first resistor is connected to the EN pin of the step-down DC-DC power management chip.

[0020] One end of the second resistor is connected to the IS pin of the step-down DC-DC power management chip, and the other end of the second resistor is connected to one end of the fourth capacitor.

[0021] The cathode of the Zener diode is connected to one end of the fourth capacitor, and the anode of the Zener diode is grounded.

[0022] One end of the inductor is connected to the cathode of the Zener diode, and the other end of the inductor is connected to the 5V output.

[0023] One end of the fifth capacitor is connected to the other end of the inductor, and the other end of the fifth capacitor is connected to the FB pin of the step-down DC-DC power management chip.

[0024] One end of the third resistor is connected to one end of the fifth capacitor, and the other end of the third resistor is connected to the other end of the fifth capacitor.

[0025] One end of the fourth resistor is connected to one end of the third resistor, and the other end of the fourth resistor is grounded;

[0026] One end of the sixth capacitor is connected to the other end of the inductor, and the other end of the sixth capacitor is grounded.

[0027] One end of the seventh capacitor is connected to the other end of the inductor, and the other end of the seventh capacitor is grounded.

[0028] One end of the fifth resistor is connected to the other end of the inductor, and the other end of the fifth resistor is grounded.

[0029] Optionally, the linear voltage regulator circuit includes a voltage regulator chip, an eighth capacitor, and a ninth capacitor;

[0030] The VIN pin of the voltage regulator chip is connected to a 5V power supply, the VOUT pin is connected to a 3.3V output, the ADJ pin is grounded, and the TAB pin is connected to a 3.3V output.

[0031] One end of the eighth capacitor is connected to the VIN pin of the voltage regulator chip, and the other end of the eighth capacitor is grounded.

[0032] One end of the ninth capacitor is connected to the VOUT pin of the voltage regulator chip, and the other end of the ninth capacitor is grounded.

[0033] Optionally, the reference voltage circuit includes an LM317 chip, a tenth capacitor, an eleventh capacitor, a sixth resistor, and a seventh resistor;

[0034] One end of the sixth resistor is connected to the ADJUST pin of the LM317 chip, and the other end of the sixth resistor is connected to the OUTPUT pin of the LM317 chip and one end of the eleventh capacitor. One end of the seventh resistor is connected to one end of the sixth resistor, and the other end of the seventh resistor is connected to one end of the tenth capacitor. The other end of the tenth capacitor is connected to the INPUT pin of the LM317 chip and the 3.3V power supply. The other end of the eleventh capacitor is grounded, and the OUTPUT pin of the LM317 chip is connected to the reference power supply.

[0035] Optionally, the operational amplifier circuit includes an LM358 operational amplifier, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor;

[0036] One end of the eighth resistor is connected to pin 2 of the LM358 operational amplifier, and the other end of the eighth resistor is grounded.

[0037] One end of the ninth resistor is connected to pin 3 of the LM358 operational amplifier, and the other end of the ninth resistor is connected to the voltage detection signal input terminal.

[0038] One end of the tenth resistor is connected to pin 3 of the LM358 operational amplifier, and the other end of the tenth resistor is grounded.

[0039] One end of the eleventh resistor is connected to pin 7 of the LM358 operational amplifier, and the other end of the eleventh resistor is connected to pin 6 of the LM358 operational amplifier.

[0040] One end of the twelfth resistor is connected to pin 6 of the LM358 operational amplifier, and the other end of the twelfth resistor is connected to pin 1 of the LM358 operational amplifier.

[0041] One end of the thirteenth resistor is connected to pin 6 of the LM358 operational amplifier, and the other end of the thirteenth resistor is connected to the reference voltage.

[0042] One end of the fourteenth resistor is connected to one end of the eleventh resistor, and the other end of the fourteenth resistor is connected to the ADC input pin of the microcontroller circuit.

[0043] One end of the fifteenth resistor is connected to the other end of the fourteenth resistor, and the other end of the fifteenth resistor is grounded.

[0044] The second aspect of this utility model provides a high-energy surge absorption monitoring and counting device, including a device body and the high-energy surge absorption monitoring and counting circuit described in any of the first aspects;

[0045] The high-energy surge absorption monitoring and counting circuit is installed inside the equipment body.

[0046] Optionally, the outer casing of the device body is made of aluminum alloy and is connected to the grounding point of the high-energy surge absorption monitoring and counting circuit by bolts.

[0047] Optionally, the interior of the equipment body is filled with quartz sand.

[0048] Optionally, the ADC sampling line between the operational amplifier circuit and the microcontroller circuit uses a soft silicone shielded connection wire, and a shielding mesh is provided between the operational amplifier circuit and the microcontroller circuit.

[0049] As can be seen from the above technical solutions, the high-energy surge absorption monitoring and counting circuit and device provided by this utility model have the following advantages:

[0050] The high-energy surge absorption monitoring and counting circuit and device provided by this utility model includes a transformer circuit, an operational amplifier circuit, a microcontroller circuit, and a display circuit. The transformer circuit, operational amplifier circuit, and display circuit are respectively connected to the microcontroller circuit. The transformer circuit transforms the DC power supply into DC power for use by the operational amplifier circuit, microcontroller circuit, and display circuit. The operational amplifier circuit attenuates the overvoltage on the DC power supply line and inputs it to the microcontroller circuit after DC bias. The microcontroller circuit monitors the power supply voltage in real time to determine whether the DC surge arrester has operated. When the DC surge arrester operates, the number of operations, the operation time, and the maximum voltage amplitude within one millisecond of the operation are recorded and displayed through the display circuit. This not only realizes the counting of DC surge arrester operations but also records the frequency of thunderstorms passing through the DC surge arrester, solving the technical problem that existing 24V / 48V DC surge arresters have no operation counting function and cannot record the frequency of thunderstorms. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a structural diagram of a high-energy surge absorption circuit provided in this utility model;

[0053] Figure 2 This is a circuit diagram of the BUCK step-down circuit provided in this utility model;

[0054] Figure 3 This is a circuit diagram of the linear voltage regulator circuit provided in this utility model;

[0055] Figure 4 This is a circuit diagram of the reference voltage circuit provided in this utility model;

[0056] Figure 5 This is a circuit structure diagram of the operational amplifier circuit provided in this utility model;

[0057] Figure 6 This is a schematic diagram of the high-energy surge absorption monitoring and counting device provided in this utility model. Detailed Implementation

[0058] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] For easier understanding, please refer to Figure 1 This utility model provides an embodiment of a high-energy surge absorption monitoring and counting circuit, which includes a transformer circuit, an operational amplifier circuit, a microcontroller circuit, and a display circuit.

[0060] The transformer circuit, operational amplifier circuit, and display circuit are respectively connected to the microcontroller circuit;

[0061] Transformer circuits are used to transform DC power into DC power for operational amplifier circuits, microcontroller circuits, and display circuits.

[0062] Operational amplifier circuits are used to attenuate overvoltages on DC power lines and input them to microcontroller circuits after DC biasing.

[0063] The microcontroller circuit is used to monitor the power supply voltage in real time and determine whether the DC surge arrester has been activated. When the DC surge arrester is activated, the number of activations, the activation time, and the maximum voltage amplitude within one millisecond of the activation are recorded.

[0064] The display circuit is used to display the number of times the DC surge arrester operates, the operating time, and the maximum voltage amplitude within one millisecond of the operation.

[0065] It should be noted that the transformer circuit transforms the 24V / 48V DC power supply into DC power for the operational amplifier circuit, microcontroller circuit, and display circuit. The operational amplifier circuit attenuates overvoltages on the DC power line and inputs them to the microcontroller circuit after DC biasing. The microcontroller circuit monitors the power supply voltage in real time via an ADC to determine whether the DC surge arrester has tripped. When the DC surge arrester trips, the microcontroller circuit detects the voltage anomaly, records the maximum voltage amplitude within one millisecond, and records the trip time and number of trips. The display circuit displays the number of DC surge arrester trips, trip time, and the maximum voltage amplitude within one millisecond recorded by the microcontroller circuit on the display screen. The microcontroller circuit can use an ESP-12F chip. When needed, the recorded historical data can be exported by connecting to the WIFI signal emitted by the ESP-12F chip.

[0066] In one embodiment, the transformer circuit includes a buck converter, a linear regulator, and a reference voltage circuit. The buck converter converts the DC power supply voltage to 5V, the linear regulator converts the 5V to 3.3V, and the reference voltage circuit converts the 3.3V to 2.5V. See also... Figure 2 The BUCK step-down circuit includes a step-down DC-DC power management chip EG1192L, a first capacitor C15, a second capacitor C1, a third capacitor C4, a fourth capacitor C5, a fifth capacitor C9, a sixth capacitor C7, a seventh capacitor C8, a first resistor R1, a second resistor R21, a third resistor R3, a fourth resistor R4, a fifth resistor R2, a Zener diode D1, and a first inductor L2.

[0067] One end of the first capacitor C15 is connected to the DC power supply VCC, and the other end of the first capacitor C15 is grounded.

[0068] One end of the second capacitor C1 is connected to the DC power supply VCC, and the other end of the second capacitor C1 is grounded.

[0069] One end of the third capacitor C4 is connected to the DC power supply VCC, and the other end of the third capacitor C4 is connected to the VIA pin of the step-down DC-DC power management chip.

[0070] One end of the fourth capacitor C5 is connected to the VS pin of the step-down DC-DC power management chip, and the other end of the fourth capacitor C5 is connected to the VB pin of the step-down DC-DC power management chip.

[0071] One end of the first resistor R1 is connected to the DC power supply VCC, and the other end of the first resistor R1 is connected to the EN pin of the step-down DC-DC power management chip.

[0072] One end of the second resistor R21 is connected to the IS pin of the step-down DC-DC power management chip, and the other end of the second resistor R21 is connected to one end of the fourth capacitor.

[0073] The cathode of Zener diode D1 is connected to one end of the fourth capacitor C5, and the anode and cathode of Zener diode D1 are grounded.

[0074] One end of inductor L2 is connected to the cathode of Zener diode D1, and the other end of inductor D2 is connected to the +5V output;

[0075] One end of the fifth capacitor C9 is connected to the other end of the inductor L2, and the other end of the fifth capacitor C9 is connected to the FB pin of the step-down DC-DC power management chip.

[0076] One end of the third resistor R3 is connected to one end of the fifth capacitor C9, and the other end of the third resistor R3 is connected to the other end of the fifth capacitor C9.

[0077] One end of the fourth resistor R4 is connected to one end of the third resistor R3, and the other end of the fourth resistor R4 is grounded.

[0078] One end of the sixth capacitor C7 is connected to the other end of the inductor L2, and the other end of the sixth capacitor C7 is grounded.

[0079] One end of the seventh capacitor C8 is connected to the other end of the inductor L2, and the other end of the seventh capacitor C8 is grounded.

[0080] One end of the fifth resistor R2 is connected to the other end of the inductor L2, and the other end of the fifth resistor R2 is grounded.

[0081] The EG1192L supports 10-100V voltage input and converts it to +5V voltage, minimizing the risk of damage to the transformer circuit and subsequent components caused by surge overvoltage. Figure 2 In the circuit, C1 is 100nF, C15 is 22uF, R1 is 470kΩ, R2 is 1kΩ, R3 is 3.6kΩ, R4 is 1.2kΩ, C4 is 10nF, C5 is 100nF, C7 is 100nF, C8 is 10uF, R21 is 100mΩ, and L2 is 47uH.

[0082] In one embodiment, see Figure 3 The linear voltage regulator circuit includes a voltage regulator chip AMS1117, an eighth capacitor C10, and a ninth capacitor C11. The VIN pin of the voltage regulator chip is connected to the +5V power supply, the VOUT pin is connected to the +3.3V output, the ADJ pin is grounded, and the TAB pin is connected to the +3.3V output. One end of the eighth capacitor C10 is connected to the VIN pin of the voltage regulator chip, and the other end is grounded. One end of the ninth capacitor C11 is connected to the VOUT pin of the voltage regulator chip, and the other end is grounded. The linear voltage regulator circuit mainly consists of the AMS1117, the 22uF eighth capacitor C11, and the 10uF capacitor C10, converting the +5V voltage to 3.3V for use by the operational amplifier and the microcontroller chip.

[0083] In one embodiment, see Figure 4 The reference voltage circuit includes an LM317 chip, a tenth capacitor C16, an eleventh capacitor C17, a sixth resistor R32, and a seventh resistor R31. One end of the sixth resistor R32 is connected to the ADJUST pin of the LM317 chip, and the other end of the sixth resistor R32 is connected to the OUTPUT pin of the LM317 chip and one end of the eleventh capacitor C17. One end of the seventh resistor R31 is connected to one end of the sixth resistor R32, and the other end of the seventh resistor R31 is connected to one end of the tenth capacitor C16. The other end of the tenth capacitor C16 is connected to the INPUT pin of the LM317 chip and the +3.3V power supply. The other end of the eleventh capacitor C17 is grounded. The OUTPUT pin of the LM317 chip is connected to the reference power supply VREF. The reference voltage circuit mainly consists of an LM317, a 100nF tenth capacitor C16, a 1uF eleventh capacitor C17, a 10kΩ sixth resistor R32, and a 3kΩ seventh resistor R31. By changing +3.3V to +2.5V, it provides a bias voltage for the operational amplifier circuit.

[0084] In one embodiment, see Figure 5The operational amplifier circuit includes an LM358 operational amplifier, resistors R35 (eighth), R33 (ninth), R34 (tenth), R42 (eleventh), R40 (twelfth), R41 (thirteenth), R44 (fourteenth), R45 (fifth), and R36 (sixteenth). One end of resistor R35 is connected to pin 2 of the LM358 operational amplifier, and the other end is grounded. One end of resistor R33 is connected to pin 3 of the LM358 operational amplifier, and the other end is connected to the voltage detection signal input terminal VSIN. One end of resistor R34 is connected to pin 3 of the LM358 operational amplifier, and the other end is grounded. One end of resistor R42 is connected to pin 7 of the LM358 operational amplifier, and the other end is connected to... Connect pin 6 of the LM358 operational amplifier; connect one end of the twelfth resistor R40 to pin 6 of the LM358 operational amplifier, and connect the other end of the twelfth resistor R40 to pin 1 of the LM358 operational amplifier; connect one end of the thirteenth resistor R41 to pin 6 of the LM358 operational amplifier, and connect the other end of the thirteenth resistor R41 to the reference voltage; connect one end of the fourteenth resistor R44 to one end of the eleventh resistor, and connect the other end of the fourteenth resistor R44 to the ADC input pin of the microcontroller circuit; connect one end of the fifteenth resistor R45 to the other end of the fourteenth resistor R44, and connect the other end of the fifteenth resistor R45 to ground; connect one end of the sixteenth resistor R36 to pin 2 of the LM358 operational amplifier, and connect the other end of the sixteenth resistor R36 to pin 1 of the LM358 operational amplifier. Figure 5 The values ​​of the resistors are as follows: R33 is 100kΩ, R34 is 1kΩ, R35 is 100kΩ, R36 is 1kΩ, R40 is 10kΩ, R41 is 10kΩ, R42 is 10kΩ, R44 is 20kΩ, and R45 is 10kΩ.

[0085] The high-energy surge absorption monitoring and counting circuit provided by this utility model includes a transformer circuit, an operational amplifier circuit, a microcontroller circuit, and a display circuit. The transformer circuit, operational amplifier circuit, and display circuit are respectively connected to the microcontroller circuit. The transformer circuit transforms the DC power supply into DC power for use by the operational amplifier circuit, microcontroller circuit, and display circuit. The operational amplifier circuit attenuates the overvoltage on the DC power supply line and inputs it to the microcontroller circuit after DC bias. The microcontroller circuit monitors the power supply voltage in real time to determine whether the DC surge arrester has operated. When the DC surge arrester operates, the number of operations, the operation time, and the maximum voltage amplitude within one millisecond of the operation are recorded and displayed through the display circuit. This not only realizes the counting of DC surge arrester operations but also records the frequency of thunderstorms passing through the DC surge arrester, solving the technical problem that existing 24V / 48V DC surge arresters have no operation counting function and cannot record the frequency of thunderstorms.

[0086] For easier understanding, please refer to Figure 6 This utility model provides an embodiment of a high-energy surge absorption monitoring and counting device, including a device body and any one of the high-energy surge absorption monitoring and counting circuits in the various embodiments of the high-energy surge absorption monitoring and counting circuits provided in this utility model. The high-energy surge absorption monitoring and counting circuit is installed inside the device body.

[0087] In one embodiment, the device body housing is made of aluminum alloy and is connected to the grounding point of the high-energy surge absorption monitoring and counting circuit by bolts to achieve good electrical conductivity.

[0088] In one embodiment, the device body is filled with quartz sand, whose high thermal conductivity and low coefficient of thermal expansion help electronic components dissipate heat effectively, while its excellent insulation and high temperature resistance prevent internal flashover.

[0089] In one embodiment, the ADC sampling line between the operational amplifier circuit and the microcontroller circuit uses a soft silicone shielded connection line, and a shielding mesh is provided between the operational amplifier circuit and the microcontroller circuit. The shielding mesh is connected to the outer shell of the device body to avoid interference from the strong electromagnetic pulse generated by lightning current on the high-energy surge absorption monitoring and counting circuit.

[0090] The high-energy surge absorption monitoring and counting device provided by this utility model is composed of the high-energy surge absorption monitoring and counting circuit provided by this utility model, and can achieve the same technical effect as the high-energy surge absorption monitoring and counting circuit provided by this utility model, which will not be described in detail here.

[0091] The terms "first," "second," "third," etc., used in this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented, for example, 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.

[0092] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-energy surge absorption monitor counting circuit, characterized by, This includes transformer circuits, operational amplifier circuits, microcontroller circuits, and display circuits; The transformer circuit, operational amplifier circuit, and display circuit are respectively connected to the microcontroller circuit; Transformer circuits are used to transform DC power into DC power for operational amplifier circuits, microcontroller circuits, and display circuits. Operational amplifier circuits are used to attenuate overvoltages on DC power lines and input them to microcontroller circuits after DC biasing. The microcontroller circuit is used to monitor the power supply voltage in real time and determine whether the DC surge arrester has been activated. When the DC surge arrester is activated, the number of activations, the activation time, and the maximum voltage amplitude within one millisecond of the activation are recorded. The display circuit is used to display the number of times the DC surge arrester operates, the operating time, and the maximum voltage amplitude within one millisecond of the operation.

2. The high-energy surge absorption monitor counter circuit of claim 1, wherein, The transformer circuit includes a BUCK step-down circuit, a linear regulator circuit, and a reference voltage circuit; The BUCK step-down circuit is used to convert DC power supply voltage to 5V. A linear voltage regulator circuit is used to convert 5V voltage to 3.3V voltage; The reference voltage circuit is used to convert 3.3V to 2.5V.

3. The high-energy surge absorption monitor counter circuit of claim 2, wherein, The BUCK step-down circuit includes a step-down DC-DC power management chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a Zener diode, and a first inductor. One end of the first capacitor is connected to the DC power supply, and the other end of the first capacitor is grounded. One end of the second capacitor is connected to the DC power supply, and the other end of the second capacitor is grounded. One end of the third capacitor is connected to the DC power supply, and the other end of the third capacitor is connected to the VIA pin of the step-down DC-DC power management chip. One end of the fourth capacitor is connected to the VS pin of the step-down DC-DC power management chip, and the other end of the fourth capacitor is connected to the VB pin of the step-down DC-DC power management chip. One end of the first resistor is connected to the DC power supply, and the other end of the first resistor is connected to the EN pin of the step-down DC-DC power management chip. One end of the second resistor is connected to the IS pin of the step-down DC-DC power management chip, and the other end of the second resistor is connected to one end of the fourth capacitor. The cathode of the Zener diode is connected to one end of the fourth capacitor, and the anode of the Zener diode is grounded. One end of the inductor is connected to the cathode of the Zener diode, and the other end of the inductor is connected to the 5V output. One end of the fifth capacitor is connected to the other end of the inductor, and the other end of the fifth capacitor is connected to the FB pin of the step-down DC-DC power management chip. One end of the third resistor is connected to one end of the fifth capacitor, and the other end of the third resistor is connected to the other end of the fifth capacitor. One end of the fourth resistor is connected to one end of the third resistor, and the other end of the fourth resistor is grounded; One end of the sixth capacitor is connected to the other end of the inductor, and the other end of the sixth capacitor is grounded. One end of the seventh capacitor is connected to the other end of the inductor, and the other end of the seventh capacitor is grounded. One end of the fifth resistor is connected to the other end of the inductor, and the other end of the fifth resistor is grounded.

4. The high-energy surge absorption monitoring and counting circuit according to claim 2, characterized in that, The linear voltage regulator circuit includes a voltage regulator chip, an eighth capacitor, and a ninth capacitor; The VIN pin of the voltage regulator chip is connected to a 5V power supply, the VOUT pin is connected to a 3.3V output, the ADJ pin is grounded, and the TAB pin is connected to a 3.3V output. One end of the eighth capacitor is connected to the VIN pin of the voltage regulator chip, and the other end of the eighth capacitor is grounded. One end of the ninth capacitor is connected to the VOUT pin of the voltage regulator chip, and the other end of the ninth capacitor is grounded.

5. The high-energy surge absorption monitoring and counting circuit according to claim 2, characterized in that, The reference voltage circuit includes an LM317 chip, a tenth capacitor, an eleventh capacitor, a sixth resistor, and a seventh resistor; One end of the sixth resistor is connected to the ADJUST pin of the LM317 chip, and the other end of the sixth resistor is connected to the OUTPUT pin of the LM317 chip and one end of the eleventh capacitor. One end of the seventh resistor is connected to one end of the sixth resistor, and the other end of the seventh resistor is connected to one end of the tenth capacitor. The other end of the tenth capacitor is connected to the INPUT pin of the LM317 chip and the 3.3V power supply. The other end of the eleventh capacitor is grounded, and the OUTPUT pin of the LM317 chip is connected to the reference power supply.

6. The high-energy surge absorption monitoring and counting circuit according to claim 1, characterized in that, The operational amplifier circuit includes an LM358 operational amplifier, and resistors 8, 9, 10, 11, 12, 13, 14, 15, and 16. One end of the eighth resistor is connected to pin 2 of the LM358 operational amplifier, and the other end of the eighth resistor is grounded. One end of the ninth resistor is connected to pin 3 of the LM358 operational amplifier, and the other end of the ninth resistor is connected to the voltage detection signal input terminal. One end of the tenth resistor is connected to pin 3 of the LM358 operational amplifier, and the other end of the tenth resistor is grounded. One end of the eleventh resistor is connected to pin 7 of the LM358 operational amplifier, and the other end of the eleventh resistor is connected to pin 6 of the LM358 operational amplifier. One end of the twelfth resistor is connected to pin 6 of the LM358 operational amplifier, and the other end of the twelfth resistor is connected to pin 1 of the LM358 operational amplifier. One end of the thirteenth resistor is connected to pin 6 of the LM358 operational amplifier, and the other end of the thirteenth resistor is connected to the reference voltage. One end of the fourteenth resistor is connected to one end of the eleventh resistor, and the other end of the fourteenth resistor is connected to the ADC input pin of the microcontroller circuit. One end of the fifteenth resistor is connected to the other end of the fourteenth resistor, and the other end of the fifteenth resistor is grounded.

7. A high-energy surge absorption monitoring and counting device, characterized in that, Includes the device body and the high-energy surge absorption monitoring and counting circuit according to any one of claims 1-6; The high-energy surge absorption monitoring and counting circuit is installed inside the equipment body.

8. The high-energy surge absorption monitoring and counting device according to claim 7, characterized in that, The outer casing of the device is made of aluminum alloy and is connected to the grounding point of the high-energy surge absorption monitoring and counting circuit by bolts.

9. The high-energy surge absorption monitoring and counting device according to claim 7, characterized in that, The equipment body is filled with quartz sand.

10. The high-energy surge absorption monitoring and counting device according to claim 7, characterized in that, The ADC sampling line between the operational amplifier circuit and the microcontroller circuit uses a soft silicone shielded connection wire, and a shielding mesh is installed between the operational amplifier circuit and the microcontroller circuit.

Images