Wake-up circuit of self-energy-taking sensing device and control method of wake-up circuit

Abstract

The invention discloses a self-energy-taking sensing device wake-up circuit and a control method thereof.A signal conditioning circuit collects sinusoidal signals transmitted by a sensor on power equipment, processes the sinusoidal signals and transmits the sinusoidal signals to a square wave generating circuit, and the square wave generating circuit generates square wave signals according to the characteristics of the sinusoidal signals and sends the square wave signals to a central controller; the central controller controls the working state of the self-energy-taking sensor circuit according to the received square wave signal, wakes up the self-energy-taking sensor circuit to monitor the state of the power equipment when the sensor monitoring data on the power equipment is abnormal, and enables the self-energy-taking sensor circuit to sleep when the sensor monitoring data on the power equipment returns to normal; while low-power-consumption operation is ensured, real-time performance and reliability of power equipment monitoring are realized, and the system is suitable for various scenes requiring long-term, stable and accurate monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment status monitoring, and in particular to a wake-up circuit of a self-energy sensing device and a control method thereof. Background Art

[0002] Real-time monitoring of power equipment status is crucial for ensuring the safe and stable operation of power systems. During power equipment operation, dynamic changes in signals such as voltage, current, and vibration directly reflect the equipment's operating status. However, due to the complexity and diversity of the power industry environment, detecting and analyzing equipment operating status signals presents numerous challenges. To reduce the power consumption of sensor nodes, current monitoring systems employ a periodic operating mode, optimizing energy consumption by switching the sensor system between sleep and wakeup states. However, power equipment status monitoring typically involves random, sparse events, and traditional periodic wakeup mechanisms present inherent limitations: excessively long monitoring cycles can lead to missed detection of key fault signatures, while excessively short cycles significantly increase system workload and energy consumption. Therefore, achieving real-time and reliable power equipment monitoring while ensuring low power operation remains a pressing technical challenge for those skilled in the art. Summary of the Invention

[0003] The present invention provides a self-energy sensor device wake-up circuit and a control method thereof, which achieves real-time and reliability of power equipment monitoring while ensuring low-power operation.

[0004] In view of this, a first aspect of the present invention provides a wake-up circuit for a self-energy sensor device, comprising a signal conditioning circuit, a square wave generating circuit, a self-energy sensor circuit and a central controller;

[0005] The signal conditioning circuit is used to collect the sinusoidal signals transmitted by the sensors on the power equipment and perform signal processing. The sensors on the power equipment include any one or more of current sensors, voltage sensors, ultrasonic sensors and / or vibration sensors;

[0006] The input end of the square wave generating circuit is connected to the output end of the signal conditioning circuit, and the output end of the square wave generating circuit is connected to the central controller;

[0007] The central controller is connected to the self-energy sensor circuit, which includes a power management circuit and a monitoring circuit. The monitoring circuit is used to monitor the operating status of the power equipment.

[0008] Optionally, a signal transmission module is further included;

[0009] The input end of the signal transmission module is connected to the central controller, and the output end of the signal transmission module is connected to the host computer.

[0010] Optionally, an alarm module is also included;

[0011] The alarm module is connected to the central controller.

[0012] Optionally, a switch control module is further included;

[0013] The switch control module is connected to the central controller, and the switch control module is used to control the power supply of the power equipment.

[0014] Optionally, an energy harvester is also included;

[0015] Energy harvesters are installed on power equipment;

[0016] The output end of the energy harvesting device is connected to the input end of the signal conditioning circuit, and the output end of the signal conditioning circuit is connected to the self-energy sensor circuit.

[0017] Optionally, the square wave generating circuit includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first diode, a second diode, a first XOR gate, a second XOR gate, a third XOR gate, and a fourth XOR gate;

[0018] One end of the first capacitor is connected to the positive signal electrode of the signal conditioning circuit, the negative signal electrode of the signal conditioning circuit is grounded, the other end of the first capacitor is connected to the first input terminal of the first XOR gate, one end of the first resistor is connected to the VCC power supply, the other end of the first resistor is connected to the first input terminal of the first XOR gate, one end of the second resistor is connected to the input terminal of the first XOR gate, the other end of the second resistor is grounded, the second input terminal of the first XOR gate is connected to the VCC power supply, the output terminal of the first XOR gate is connected to one end of the second capacitor, the other end of the second capacitor is respectively connected to the cathode of the first diode and the anode of the second diode, the anode of the first diode is grounded, one end of the third capacitor is respectively connected to the cathode of the second diode and the first input terminal of the second XOR gate, the other end of the third capacitor is connected to the cathode of the second diode and the first input terminal of the second XOR gate, The first input terminal of the fourth XOR gate is connected to the ground, the second input terminal of the fourth XOR gate is connected to the VCC power supply, the output terminal of the second XOR gate is respectively connected to the second input terminal of the third XOR gate and one end of the fourth resistor, the other end of the fourth resistor is respectively connected to the first input terminal of the third XOR gate and one end of the fourth capacitor, the other end of the fourth capacitor is grounded, the output terminal of the third XOR gate is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to one end of the fifth capacitor, the other end of the fifth capacitor is grounded, the first input terminal of the fourth XOR gate is grounded, the second input terminal of the fourth XOR gate is respectively connected to the other end of the fifth resistor and one end of the fifth capacitor, and the output terminal plate of the fourth XOR gate is connected to the input terminal of the central controller.

[0019] A second aspect of the present invention provides a control method for a wake-up circuit of any self-energy sensing device provided in the first aspect, comprising:

[0020] S1. The central controller receives a square wave signal transmitted by a square wave generating circuit. The square wave signal is obtained by converting a sine signal collected by a signal conditioning circuit from a sensor of the power equipment into a square wave signal. When the sine signal crosses the limit, the square wave generating circuit generates a square wave signal.

[0021] S2. When the central controller receives an odd-numbered square wave signal, it jumps to step S3; when it receives an even-numbered square wave signal, it jumps to step S4;

[0022] S3. The central controller sends a first control signal to the self-energy sensor circuit, so that the monitoring circuit of the self-energy sensor circuit is awakened;

[0023] S4. The central controller sends a second control signal to the self-energy sensor circuit, causing the monitoring circuit of the self-energy sensor circuit to enter a dormant state.

[0024] Optionally, step S3 further includes:

[0025] The central controller sends an alarm signal to the alarm module, causing the alarm module to sound an alarm.

[0026] Optionally, step S3 further includes:

[0027] The central controller sends a power cut-off signal to the switch control module, causing the switch control module to cut off the power supply to the electrical equipment.

[0028] Optionally, step S3 further includes:

[0029] The central controller transmits the monitoring data collected by the monitoring circuit of the self-energy sensor circuit to the host computer through the signal transmission module.

[0030] It can be seen from the above technical solutions that the self-energy sensor device wake-up circuit provided by the present invention has the following advantages:

[0031] The self-energy sensing device wake-up circuit provided by the present invention includes a signal conditioning circuit, a square wave generating circuit, a self-energy sensor circuit and a central controller. The signal conditioning circuit collects the sinusoidal signal transmitted by the sensor on the power equipment and processes the signal and transmits it to the square wave generating circuit. The square wave generating circuit generates a square wave signal according to the characteristics of the sinusoidal signal and sends it to the central controller. The central controller controls the working state of the self-energy sensor circuit according to the received square wave signal. When the sensor monitoring data on the power equipment is abnormal, the self-energy sensor circuit is awakened to monitor the state of the power equipment. When the sensor monitoring data on the power equipment returns to normal, the self-energy sensor circuit is put into sleep mode. While ensuring low-power operation, the real-time and reliability of power equipment monitoring are achieved, and the central controller is suitable for various scenarios requiring long-term, stable and accurate monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic diagram of the circuit structure of a wake-up circuit of a self-energy sensing device provided in an embodiment of the present invention;

[0034] Figure 2 This is another circuit structure diagram of a wake-up circuit of a self-energy sensing device provided in an embodiment of the present invention;

[0035] Figure 3 A circuit schematic diagram of a square wave generating circuit provided in an embodiment of the present invention;

[0036] Figure 4 The present invention provides a flowchart of a method for controlling a wake-up circuit of a self-energy sensing device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0038] For easier understanding, see Figure 1, the present invention provides an embodiment of a wake-up circuit for a self-energy sensing device, comprising a signal conditioning circuit, a square wave generating circuit, a self-energy sensor circuit and a central controller;

[0039] The signal conditioning circuit is used to collect the sinusoidal signals transmitted by the sensors on the power equipment and perform signal processing. The sensors on the power equipment include any one or more of current sensors, voltage sensors, ultrasonic sensors and / or vibration sensors;

[0040] The input end of the square wave generating circuit is connected to the output end of the signal conditioning circuit, and the output end of the square wave generating circuit is connected to the central controller;

[0041] The central controller is connected to the self-energy sensor circuit, which includes a power management circuit and a monitoring circuit. The monitoring circuit is used to monitor the operating status of the power equipment.

[0042] It should be noted that any one or more of current sensors, voltage sensors, ultrasonic sensors, and / or vibration sensors will be installed on the power equipment to monitor the current signal, voltage signal, ultrasonic signal, and vibration signal of the power equipment. The sinusoidal signal output by the sensor on the power equipment is filtered and amplified by the signal conditioning circuit, and then output to the square wave generating circuit. The square wave generating circuit converts the sinusoidal signal into a square wave signal based on the characteristics of the sinusoidal signal and outputs the square wave signal to the central controller. Specifically, when the power equipment changes from a normal state to a fault state, the sinusoidal signal will cross the boundary, and when the power equipment changes from a fault state to a normal state, the sinusoidal signal will also cross the boundary. When the square wave generating circuit detects that the sinusoidal signal has crossed the boundary, it generates a square wave signal. The central controller can be an MCU (Microcontroller Unit). When the central controller receives an odd-numbered square wave signal (i.e., the square wave signal generated by the square wave generating circuit when the sine signal crosses the bounds when the power device transitions from a normal state to a faulty state), it sends a control signal to the power management circuit of the self-powered sensor circuit, instructing it to connect the power supply to the monitoring circuit, waking up the monitoring circuit and monitoring the operating status of the power device. When the central controller receives an even-numbered square wave signal (i.e., the square wave signal generated by the square wave generating circuit when the sine signal crosses the bounds when the power device transitions from a faulty state to a normal state), it sends a control signal to the power management circuit of the self-powered sensor circuit, instructing it to disconnect the power supply to the monitoring circuit, putting the monitoring circuit into a dormant state and reducing energy consumption. The power management circuit of the self-powered sensor circuit can also provide power to the central controller.

[0043] The self-energy sensing device wake-up circuit provided by the present invention includes a signal conditioning circuit, a square wave generating circuit, a self-energy sensor circuit and a central controller. The signal conditioning circuit collects the sinusoidal signal transmitted by the sensor on the power equipment and processes the signal and transmits it to the square wave generating circuit. The square wave generating circuit generates a square wave signal according to the characteristics of the sinusoidal signal and sends it to the central controller. The central controller controls the working state of the self-energy sensor circuit according to the received square wave signal. When the sensor monitoring data on the power equipment is abnormal, the self-energy sensor circuit is awakened to monitor the state of the power equipment. When the sensor monitoring data on the power equipment returns to normal, the self-energy sensor circuit is put into sleep mode. While ensuring low-power operation, the real-time and reliability of power equipment monitoring are achieved, and the central controller is suitable for various scenarios requiring long-term, stable and accurate monitoring.

[0044] In one embodiment, see Figure 2 The wake-up circuit of the self-powered sensor device provided herein also includes a signal transmission module. The input of the signal transmission module is connected to a central controller, and the output of the signal transmission module is connected to a host computer. The central controller is configured to transmit monitoring data collected by the monitoring circuit of the self-powered sensor circuit to the host computer via the signal transmission module, enabling real-time monitoring, precise control, and in-depth analysis of the device.

[0045] In one embodiment, see Figure 2 The wake-up circuit of the self-powered sensor device provided by the present invention also includes an alarm module. The alarm module is connected to the central controller. When the central controller determines that the square wave signal is abnormal, it sends an alarm signal to the alarm module, causing the alarm module to sound an alarm, facilitating timely maintenance and inspection by power station personnel, thereby improving fault handling efficiency.

[0046] In one embodiment, see Figure 2 The wake-up circuit of the self-energy sensor device provided by the present invention also includes a switch control module. The switch control module is connected to the central controller and is used to control the power supply to the power device. When the central controller determines that the square wave signal is abnormal, it further determines whether to shut off the power supply to the power device. If so, it sends a power-off signal to the switch control module, causing it to shut off the power supply to the power device to protect it.

[0047] In one embodiment, see Figure 2The self-energy sensor device wake-up circuit provided by the present invention also includes an energy harvester. The energy harvester is installed on the power equipment. The output end of the energy harvester is connected to the input end of the signal conditioning circuit, and the output end of the signal conditioning circuit is connected to the self-energy sensor circuit. The energy harvester is used to obtain energy from environmental energy and transmit it to the power management circuit of the self-energy sensor circuit through the signal conditioning circuit. After the signal generated by the energy harvester passes through the signal conditioning circuit, it also forms a sinusoidal signal and is sent to the square wave generating circuit.

[0048] In one embodiment, see Figure 3 In the wake-up circuit of the self-energy sensing device provided by the present invention, the square wave generating circuit includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first diode D1, a second diode D2, a first XOR gate U1A, a second XOR gate U2A, a third XOR gate U5B, and a fourth XOR gate U4C.

[0049] V1 is the sinusoidal signal output by the signal conditioning circuit. One end of the first capacitor C1 is connected to the positive signal electrode of the signal conditioning circuit, and the negative signal electrode of the signal conditioning circuit is grounded. The other end of the first capacitor C1 is connected to the first input end of the first XOR gate U1A, one end of the first resistor R1 is connected to the vcc power supply, the other end of the first resistor R1 is connected to the first input end of the first XOR gate U1A, one end of the second resistor R2 is connected to the input end of the first XOR gate U1A, the other end of the second resistor R2 is grounded, the second input end of the first XOR gate U1A is connected to the vcc power supply, the output end of the first XOR gate U1A is connected to one end of the second capacitor C2, the other end of the second capacitor C2 is respectively connected to the cathode of the first diode D1 and the anode of the second diode D2, the anode of the first diode D1 is grounded, one end of the third capacitor C3 is respectively connected to the cathode of the second diode D2 and the first input end of the second XOR gate U2A, the other end of the third capacitor C3 is connected to One end of the third resistor R3 is connected to the first input end of the second XOR gate U2A, the other end of the third resistor R3 is grounded, the second input end of the second XOR gate U2A is connected to the VCC power supply, the output end of the second XOR gate U2A is respectively connected to the second input end of the third XOR gate U5B and one end of the fourth resistor R4, the other end of the fourth resistor R4 is respectively connected to the first input end of the third XOR gate U5B and one end of the fourth capacitor C4, the other end of the fourth capacitor C4 is grounded, the output end of the third XOR gate U5B is connected to one end of the fifth resistor, the other end of the fifth resistor R5 is connected to one end of the fifth capacitor C5, the other end of the fifth capacitor C5 is grounded, the first input end of the fourth XOR gate U4C is grounded, the second input end of the fourth XOR gate U4C is respectively connected to the other end of the fifth resistor R5 and one end of the fifth capacitor C5, and the output end plate of the fourth XOR gate U4C is connected to the input end of the central controller.

[0050] The first capacitor C1 is primarily used to block direct current and pass alternating current. The first resistor R1 and the second resistor R2 provide a bias voltage, which feeds the sinusoidal signal into the first XOR gate circuit U1A, converting it into a square wave pulse signal of the same frequency. This square wave signal then passes through a filter circuit comprised of the third resistor R3 and the third capacitor C3, obtaining a DC voltage slightly lower than the power supply voltage. This means that the signal input to the lower port of the second XOR gate U2A is a DC voltage signal. When the sinusoidal signal input is detected, the second XOR gate U2A outputs a stable low level. When the sinusoidal signal disappears, the second XOR gate U2A outputs a stable high level. When the second XOR gate U2A outputs a transient high level, the voltage on the fourth capacitor C4 is zero, and the voltage levels of the two output ports of the third XOR gate U5B are inconsistent, resulting in a high level output. The fourth capacitor C4 then charges until its voltage matches the output voltage of the second XOR gate U2A. At this point, the third XOR gate U5B outputs a low level, resulting in a square wave signal, indicating that a sinusoidal signal has been generated at the input. When the second XOR gate U2A stops outputting a high level, the voltage on the fourth capacitor C4 is high. Due to the mismatch in the signal levels at the two XOR gate inputs, the third XOR gate U5B outputs a high level. Subsequently, the fourth capacitor C4 discharges until its voltage matches the output of the second XOR gate U2A. The third XOR gate U5B then outputs a low level. The square wave signal output at this point indicates the disappearance of the sinusoidal signal at the input. The fifth resistor R5 and the fifth capacitor C5 in the filter circuit adjust the pulse delay (i.e., when the third XOR gate U5B starts outputting, there is a delay due to the effect of the fifth capacitor C5 before the high level is output). The fourth XOR gate U4C is used to suppress multi-pulse interference during the sinusoidal signal edge phase. When the sinusoidal signal establishes / disappears, the voltage on the third capacitor C3 does not change in a step, but instead follows an exponential rise / fall characteristic following the RC charge-discharge curve. In the transition region near the threshold voltage Vth, slight fluctuations in the input signal can cause ringing at the XOR gate output, manifesting as multiple narrow pulses. The fourth XOR gate U4C, through the action of the fifth capacitor C5, maintains a stable voltage across the fifth capacitor C5 when the input signal fluctuates within the hysteresis range, thereby maintaining a stable output state for the fourth XOR gate U4C. This design effectively enhances the system's anti-interference capabilities. The first diode D1 protects against short-circuit faults between the output of the first XOR gate U1A and the reference ground. The second capacitor C2 operates on the principle of DC blocking and AC passing. When the first XOR gate U1A outputs a square wave signal, the second capacitor C2 presents a low impedance characteristic to the AC component (equivalent to a short circuit). In this case, the first diode D1 (a reverse diode) is required in series to prevent the output of the first XOR gate U1A from forming a direct short-circuit with the reference ground during the high-level period of the square wave, thus achieving overcurrent protection. The second diode D2 suppresses the rapid reverse discharge of the third capacitor C3.When the first XOR gate U1A outputs a high level, the third capacitor C3 charges to a high level. When the first XOR gate U1A outputs a low level, without the second diode D2, the third capacitor C3 will rapidly discharge in the reverse direction through the second capacitor C2, causing the voltage to be unable to be maintained. The second diode D2 blocks the reverse discharge path through its unidirectional conduction characteristics, ensuring that the voltage of the third capacitor C3 is maintained during the low-level period, thus ensuring the timing stability of the circuit. The function of the third resistor R3 is to create a discharge path for the third capacitor C3, ensuring the circuit's ability to recover after the sinusoidal input signal disappears. When the sinusoidal signal ends, the output of the first XOR gate U1A goes low, and the third capacitor C3 must discharge through the third resistor R3. Without the third resistor R3, the third capacitor C3 will be in an open circuit state, preventing the stored charge from being discharged and causing the voltage to remain at a continuously high level. By configuring the third resistor R3 with an appropriately valued resistance, the third capacitor C3 can complete the discharge process after the signal disappears, reducing the voltage to the theoretical zero level, thereby ensuring the timing accuracy of subsequent signal processing and the stability of the circuit operation. This design utilizes the RC time constant principle, achieving precise control of the discharge time by matching the parameters of the third resistor R3 and the third capacitor C3. The fourth resistor R4 and the fourth capacitor C4 form an RC delay network, implementing signal timing control based on the capacitor's charge and discharge characteristics. When a sinusoidal signal is input, the voltage at the left end of the fourth resistor R4 jumps to U, and the fourth capacitor C4 begins charging through the fourth resistor R4. According to the transient response theory of RC circuits, the capacitor voltage rises exponentially, and its charging time constant τ = R4 × C4. Within the time window of 3τ to 5τ, the voltage of the fourth capacitor C4 charges from 0 to the range of (1-e^(-3))U≈0.95U to (1-e^(-5))U≈0.993U. During this period, the third XOR gate U5B outputs a high level due to the potential difference ΔV ≠ 0 between its two input terminals. When the voltage of the fourth capacitor C4 is charged to U, the potential difference ΔV between its two input terminals equals 0, causing the third XOR gate U5B to output a low level.

[0051] For easier understanding, see Figure 4 The present invention provides a control method applied to any of the embodiments of the wake-up circuit of each energy-taking sensing device provided in the present invention, including:

[0052] Step S1: The central controller receives a square wave signal transmitted by a square wave generating circuit, wherein the square wave generating circuit generates a square wave signal when the sinusoidal signal output by the signal conditioning circuit crosses a boundary.

[0053] Step S2: When the central controller receives an odd-numbered square wave signal, it jumps to step S3; when it receives an even-numbered square wave signal, it jumps to step S4.

[0054] Step S3: The central controller sends a first control signal to the self-energy sensor circuit, so that the monitoring circuit of the self-energy sensor circuit is awakened.

[0055] Step S4: The central controller sends a second control signal to the self-energy sensor circuit, causing the monitoring circuit of the self-energy sensor circuit to enter a dormant state.

[0056] In one embodiment, step S3 further includes:

[0057] The central controller sends an alarm signal to the alarm module, causing the alarm module to sound an alarm.

[0058] In one embodiment, step S3 further includes:

[0059] The central controller sends a power cut-off signal to the switch control module, causing the switch control module to cut off the power supply to the electrical equipment.

[0060] In one embodiment, step S3 further includes:

[0061] The central controller transmits the monitoring data collected by the monitoring circuit of the self-energy sensor circuit to the host computer through the signal transmission module.

[0062] The terms "first," "second," "third," "fourth," "fifth," and the like in the present invention are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the invention described herein, for example, can be implemented in orders other than those illustrated or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising 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 process, method, product, or apparatus.

[0063] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0064] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wake-up circuit for a self-powered sensor device, characterized in that: It includes a signal conditioning circuit, a square wave generating circuit, a self-energy sensor circuit and a central controller; The signal conditioning circuit is used to collect the sinusoidal signals transmitted by the sensors on the power equipment and perform signal processing. The sensors on the power equipment include any one or more of current sensors, voltage sensors, ultrasonic sensors and / or vibration sensors; The input end of the square wave generating circuit is connected to the output end of the signal conditioning circuit, and the output end of the square wave generating circuit is connected to the central controller; The central controller is connected to the self-energy sensor circuit, which includes a power management circuit and a monitoring circuit. The monitoring circuit is used to monitor the operating status of the power equipment.

2. The self-powered sensor device wake-up circuit according to claim 1, characterized in that: Also included is a signal transmission module; The input end of the signal transmission module is connected to the central controller, and the output end of the signal transmission module is connected to the host computer.

3. The self-powered sensor device wake-up circuit according to claim 1, characterized in that: Also includes an alarm module; The alarm module is connected to the central controller.

4. The self-powered sensor device wake-up circuit according to claim 1, characterized in that: Also included is a switch control module; The switch control module is connected to the central controller, and the switch control module is used to control the power supply of the power equipment.

5. The self-powered sensor device wake-up circuit according to claim 1, characterized in that: Also included are energy harvesters; Energy harvesters are installed on power equipment; The output end of the energy harvesting device is connected to the input end of the signal conditioning circuit, and the output end of the signal conditioning circuit is connected to the self-energy sensor circuit.

6. The self-powered sensor device wake-up circuit according to any one of claims 1 to 5, characterized in that: The square wave generating circuit includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first diode, a second diode, a first XOR gate, a second XOR gate, a third XOR gate, and a fourth XOR gate; One end of the first capacitor is connected to the positive signal electrode of the signal conditioning circuit, the negative signal electrode of the signal conditioning circuit is grounded, the other end of the first capacitor is connected to the first input terminal of the first XOR gate, one end of the first resistor is connected to the VCC power supply, the other end of the first resistor is connected to the first input terminal of the first XOR gate, one end of the second resistor is connected to the input terminal of the first XOR gate, the other end of the second resistor is grounded, the second input terminal of the first XOR gate is connected to the VCC power supply, the output terminal of the first XOR gate is connected to one end of the second capacitor, the other end of the second capacitor is respectively connected to the cathode of the first diode and the anode of the second diode, the anode of the first diode is grounded, one end of the third capacitor is respectively connected to the cathode of the second diode and the first input terminal of the second XOR gate, the other end of the third capacitor is connected to the cathode of the second diode and the first input terminal of the second XOR gate, The first input terminal of the fourth XOR gate is connected to the ground, the second input terminal of the fourth XOR gate is connected to the VCC power supply, the output terminal of the second XOR gate is respectively connected to the second input terminal of the third XOR gate and one end of the fourth resistor, the other end of the fourth resistor is respectively connected to the first input terminal of the third XOR gate and one end of the fourth capacitor, the other end of the fourth capacitor is grounded, the output terminal of the third XOR gate is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to one end of the fifth capacitor, the other end of the fifth capacitor is grounded, the first input terminal of the fourth XOR gate is grounded, the second input terminal of the fourth XOR gate is respectively connected to the other end of the fifth resistor and one end of the fifth capacitor, and the output terminal plate of the fourth XOR gate is connected to the input terminal of the central controller.

7. A control method for a wake-up circuit of a self-powered sensor device according to any one of claims 1 to 6, characterized in that: include: S1. The central controller receives a square wave signal transmitted by a square wave generating circuit. When the sinusoidal signal output by the signal conditioning circuit crosses a limit, the square wave generating circuit generates a square wave signal. S2. When the central controller receives an odd-numbered square wave signal, it jumps to step S3; when it receives an even-numbered square wave signal, it jumps to step S4; S3. The central controller sends a first control signal to the self-energy sensor circuit, so that the monitoring circuit of the self-energy sensor circuit is awakened; S4. The central controller sends a second control signal to the self-energy sensor circuit, causing the monitoring circuit of the self-energy sensor circuit to enter a dormant state.

8. The control method for the wake-up circuit of the self-powered sensor device according to claim 7, characterized in that: Step S3 further includes: The central controller sends an alarm signal to the alarm module, causing the alarm module to sound an alarm.

9. The control method for waking up the circuit of the self-powered sensor device according to claim 7, characterized in that: Step S3 further includes: The central controller sends a power cut-off signal to the switch control module, causing the switch control module to cut off the power supply to the electrical equipment.

10. The control method for the wake-up circuit of the self-powered sensor device according to claim 7, characterized in that: Step S3 further includes: The central controller transmits the monitoring data collected by the monitoring circuit of the self-energy sensor circuit to the host computer through the signal transmission module.

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