Sheath flow collection system and control method thereof

Abstract

The application discloses a protective layer circulating flow collecting system and a control method thereof, which comprises a power module, a voltage regulating module, a wireless transmission trigger module, a wireless signal conversion module and a wireless signal amplification module. The inductor L1 in the power module stabilizes the current of the power module, and the capacitor C1 maintains the stability of the discharge voltage of the lithium battery B1. The capacitor C2 and the capacitor C3 in the voltage regulating module are connected in parallel to increase the capacitance, reduce the impedance value and reduce the loss in power transmission. The variable resistor RV2 in the wireless transmission trigger module controls the response speed of the flip-flop U2 according to the resistance value, and the capacitor C7 is used for filtering the excessive frequency band signals generated in the operation of the flip-flop U2. The capacitor C9 and the resistor R6 in the wireless signal conversion module are connected in parallel to reduce the impedance of wireless signal conversion and improve the response of signals on the line. The triode Q2 in the wireless signal amplification module amplifies the received weak signals, and then expands the control range of wireless remote control.

Description

Technical Field

[0001] This invention relates to the field of circulation acquisition, and in particular to a protective layer circulation acquisition system and its control method. Background Technology

[0002] With the rapid development of power grid construction and the widespread use of power cables, problems related to cable insulation are increasing. Therefore, the demand for insulation performance testing and historical data analysis of newly built or existing cables is becoming increasingly strong.

[0003] The environment in which cables are laid is complex, the distribution area is wide, the later inspection and maintenance is cumbersome, and the regular maintenance costs are huge. In addition, when collecting current signals, there are various uncertain external interferences, which interfere with the circulating current acquisition process, affect the waveband during the acquisition process, cause the original power supply to change, and the unstable power supply will directly affect the acquisition accuracy, resulting in inaccurate circulating current acquisition data. Summary of the Invention

[0004] Objective of the invention: To provide a protective layer circulation acquisition system and further propose a method for controlling the above-mentioned circulation acquisition system, thereby solving the problems mentioned above in the prior art.

[0005] Technical solution: Firstly, a sheath circulating current acquisition system is proposed, which includes six components: a power supply module, a control module, a low-pass filter module, a current transformer module, an amplification module, and an acquisition module.

[0006] The power supply module provides a stable, stored output voltage to the control module and the amplification module; the control module coordinates the operation of the low-pass filter module, the current transformer module, the amplification module, and the acquisition module; the low-pass filter module filters the power supplied by the cable; the current transformer module converts the current supplied by the cable; the amplification module adjusts the impedance of the current output by the current transformer module; and the acquisition module acquires and integrates the cable power supply information.

[0007] In a further embodiment of the first aspect, the power supply module includes capacitors C11, C12, C9, C10, and voltage regulator U3. One end of capacitor C11 is connected to one end of capacitor C12, pin 1 of voltage regulator U3, and the input DC power supply +5V. The other end of capacitor C11 is connected to ground GND, along with the other end of capacitor C12. Pin 3 of voltage regulator U3 is connected to ground GND. Pin 2 of voltage regulator U3 is connected to one end of capacitor C9 and one end of capacitor C10. The other end of capacitor C9 is connected to ground GND, along with the other end of capacitor C10.

[0008] In a further embodiment of the first aspect, the control module includes an analog-to-digital converter U4, resistors R11 and R10, capacitors C15 and C16, a crystal oscillator Y1, capacitors C13 and C14, wherein one end of resistor R11 is connected to the input power supply +5V; the other end of resistor R11 is connected to one end of resistor R10, one end of capacitor C16, one end of capacitor C15, and pin 1 of the analog-to-digital converter U4; the other end of resistor R10 is connected to the supplementary power supply 5V; and the other end of capacitor C16 is connected to... The other end of capacitor C15 is connected to pin 3 of voltage regulator U3; pins 2, 3, 5 and 17 of analog-to-digital converter U4 are all connected to ground GND; pin 4 of analog-to-digital converter U4 is connected to pin 2 of voltage regulator U3; pin 19 of analog-to-digital converter U4 is connected to one end of crystal oscillator Y1 and one end of capacitor C13; the other end of capacitor C13 is connected to ground GND and one end of capacitor C14; the other end of capacitor C14 is connected to the other end of crystal oscillator Y1 and pin 18 of analog-to-digital converter U4.

[0009] In a further embodiment of the first aspect, the low-pass filter module includes terminal block J1, terminal block J2, capacitor C1, and capacitor C2, wherein pins 1, 3, and 5 of terminal block J2 are all connected to ground GND; pins 7, 9, and 11 of terminal block J2 are respectively connected to one end of capacitor C2, one end of capacitor C1, and pin 16 of analog-to-digital converter U4; and the other end of capacitor C1 is connected to the other end of capacitor C2 and ground GND.

[0010] In a further embodiment of the first aspect, the current transformer module includes resistors R1, R2, and R3, capacitors C3 and C4, a current amplifier U1, resistors R7, R8, R9, and capacitor C8. One end of resistor R1 is connected to one end of resistor R2, pin 1 of terminal block J1, one end of resistor R7, and one end of resistor R8. The other end of resistor R1 is connected to one end of resistor R3, pin 2 of terminal block J1, the other end of resistor R7, and one end of resistor R9. The other end of resistor R8 is connected to one end of capacitor C8 and the analog-to-digital converter U1. Pin 6 of resistor R4 is connected; the other end of resistor R9 is connected to the other end of capacitor C8 and pin 7 of analog-to-digital converter U4; the other end of resistor R2 is connected to one end of capacitor C3 and pin 7 of current amplifier U1; the other end of resistor R3 is connected to the other end of capacitor C3 and pin 8 of current amplifier U1; pins 1 and 2 of current amplifier U1 are connected to capacitor C4 and pin 14 of analog-to-digital converter U1; the other end of capacitor C4 is connected to ground GND and pin 4 of current amplifier U1; pin 3 of current amplifier U1 is connected to ground GND.

[0011] In a further embodiment of the first aspect, the amplification module includes resistor R4, resistor R5, amplifier U2, and capacitor C5, wherein one end of resistor R4 is connected to pin 2 of terminal block J2; the other end of resistor R4 is connected to one end of resistor R5 and pin 3 of amplifier U2; pin 5 of amplifier U2 is connected to one end of capacitor C5 and the input power supply +5V; the other end of capacitor C5 is connected to ground GND; and pin 2 of amplifier U2 is connected to ground GND.

[0012] In a further embodiment of the first aspect, the acquisition module includes a capacitor C7, a resistor R6, a capacitor C6, and an analog switch U5, wherein pin 16 of the analog switch U5 is connected to pin 10 of terminal block J2; pin 17 of the analog switch U5 is connected to pin 8 of terminal block J2; pin 18 of the analog switch U5 is connected to pin 12 of terminal block J2; pin 2 of the analog switch U5 is connected to pin 5 of current amplifier U1; pin 7 of the analog switch U2 is connected to pin 4 and pin 1 of amplifier U2; pin 24 of the analog switch U2 is connected to one end of capacitor C7 and pin 16 of analog-to-digital converter U4; pin 12 of the analog switch U5 is connected to ground GND and the other end of capacitor C7; pin 15 of the analog switch U5 is connected to ground GND; pin 1 of the analog switch U5 is connected to one end of resistor R6; the other end of resistor R6 is connected to one end of capacitor C6 and the output terminal; and the other end of capacitor C6 is connected to ground GND.

[0013] In a further embodiment of the first aspect, the analog-to-digital converter U4 is model ADS1256IDBT; the current amplifier U1 is model INA186AZ; the analog switch U5 is model MC74H4067ADWR2G; and the amplifier U2 is model OPA314.

[0014] Secondly, a control method for a protective layer circulation acquisition system is proposed, the steps of which are as follows: Step 1: First, capacitors C11 and C12 store the input power supply +5V as the instantaneous startup power supply for voltage regulator U3, and transmit it to voltage regulator U3 for voltage regulation. After voltage regulation, voltage regulator U3 outputs the voltage and sends it to analog-to-digital converter U4. Step 2: The analog-to-digital converter U4 converts the input voltage signal into an output signal and then transmits it to each connected module. Resistor R11 steps down the input power supply +5V. Resistor R10 provides supplementary voltage according to the power supply needs of the analog-to-digital converter U4 to meet the power requirements of different pins of the analog-to-digital converter U4. Crystal oscillator Y1 modulates the signals received and transmitted by the analog-to-digital converter connected to U4. Step 3: Terminal block J2 receives power from analog-to-digital converter U4, terminal block J1 receives power from the cable output and transmits it to current amplifier U1. Capacitors C1 and C2 store the power transmitted between analog-to-digital converter U4 and terminal block J2 and filter out a stable current. When the circuit is turned on again, terminal block J2 can obtain the instantaneous corresponding voltage. Then, the received power is transmitted to amplifier U2 and analog switch U5 through terminal block J2. Step 4: At this time, terminal block J1 receives the output power from the cable. Through the connection of resistors R1, R2, and R3, the voltage and current in the output power are regulated, so that current amplifier U1 receives the shunt current and provides current to the inductive current load according to the current command. The received current is processed inductively, and the processed power is transmitted to analog switch U5. Meanwhile, resistors R8 and R9 send the transmission signal between terminal block J1 and current amplifier U1 to analog-to-digital converter U4 for monitoring. Step 5: At this time, resistor R4 reduces and regulates the voltage in the power supply transmitted by terminal block J2, resistor R5 is grounded to protect amplifier U2, amplifier U2 is powered on, and the power transmitted through the connection path is stored through capacitor C5. Amplifier U2 performs impedance modulation on the current in the power supply transmitted by terminal block J2 to avoid unstable current output, and outputs the modulated current to analog switch U5. Step 6: The current supplied by terminal block J2 and current amplifier U1 is integrated through analog switch U5, and the on / off adjustment of analog switch U5 is set. When the integrated output current exceeds the set range, analog switch U5 is turned on. When the integrated output current does not exceed the set range, analog switch U5 is in the off state. When it is in the on state, the on command of analog switch U5 is output through resistor R6, thereby providing a remote prompt.

[0015] Beneficial Effects: This invention relates to a sheath circulating current acquisition system and its control method. Capacitors C11 and C12 store the +5V input power supply as the instantaneous startup power supply for voltage regulator U3, which then performs voltage regulation. Resistor R10 provides supplementary voltage to meet the power requirements of different pins of analog-to-digital converter U4. Crystal oscillator Y1 modulates the signals received and transmitted by the analog-to-digital converter U4. Capacitors C1 and C2 store the power transmitted from the analog-to-digital converter U4 to terminal block J2 and filter out a stable current, enabling terminal block J2 to acquire the instantaneous corresponding voltage upon re-conduction. The connection of resistors R1, R2, and R3 regulates the voltage and current in the output power supply, ensuring the current... Amplifier U1 acquires the shunt current and supplies current to the inductive current load according to the current command; it also performs inductive processing on the received current and transmits the processed power supply to analog switch U5; resistors R8 and R9 send the transmission signal between terminal block J1 and current amplifier U1 to analog-to-digital converter U4 for monitoring; resistor R5 grounding protects amplifier U2; amplifier U2 performs impedance modulation on the current in the power supply from terminal block J2 to avoid unstable current output; it integrates the current supplied by terminal block J2 and current amplifier U1 through analog switch U5, and sets the on / off adjustment of analog switch U5 to provide remote prompts; it isolates the power supplies of each module to avoid affecting the accuracy of data acquisition. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall principle of the present invention.

[0017] Figure 2 This is a circuit diagram of the power supply module of the present invention.

[0018] Figure 3 This is a circuit diagram of the control module of the present invention.

[0019] Figure 4 This is a circuit layout diagram of the low-pass filter module of the present invention.

[0020] Figure 5 This is a circuit diagram of the current transformer module of the present invention.

[0021] Figure 6 This is a circuit diagram of the amplifier module of the present invention.

[0022] Figure 7 This is a circuit diagram of the acquisition module of the present invention. Detailed Implementation

[0023] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0024] Example 1: like Figures 1 to 6 As shown in the figure, this embodiment proposes a sheath circulating current acquisition system, which includes six components: a power supply module, a control module, a low-pass filter module, a current transformer module, an amplification module, and an acquisition module.

[0025] The power supply module includes capacitors C11, C12, C9, and C10, and a voltage regulator U3.

[0026] In the power supply module, one end of capacitor C11 is connected to one end of capacitor C12, pin 1 of voltage regulator U3, and the input DC power supply +5V; the other end of capacitor C11 is connected to ground GND, the other end of capacitor C12 is connected to ground GND; pin 3 of voltage regulator U3 is connected to ground GND; pin 2 of voltage regulator U3 is connected to one end of capacitor C9 and one end of capacitor C10; the other end of capacitor C9 is connected to ground GND, the other end of capacitor C10 is connected to ground GND.

[0027] The control module includes an analog-to-digital converter U4, resistors R11 and R10, capacitors C15 and C16, a crystal oscillator Y1, capacitors C13 and C14.

[0028] In the control module, one end of resistor R11 is connected to the input power supply +5V; the other end of resistor R11 is connected to one end of resistor R10, one end of capacitor C16, one end of capacitor C15, and pin 1 of analog-to-digital converter U4; the other end of resistor R10 is connected to the supplementary power supply 5V; the other end of capacitor C16 is connected to the other end of capacitor C15 and pin 3 of voltage regulator U3; pins 2, 3, 5, and 17 of analog-to-digital converter U4 are all connected to ground GND; pin 4 of analog-to-digital converter U4 is connected to pin 2 of voltage regulator U3; pin 19 of analog-to-digital converter U4 is connected to one end of crystal oscillator Y1 and one end of capacitor C13; the other end of capacitor C13 is connected to ground GND and one end of capacitor C14; the other end of capacitor C14 is connected to the other end of crystal oscillator Y1 and pin 18 of analog-to-digital converter U4.

[0029] The low-pass filter module includes terminal block J1, terminal block J2, capacitor C1, and capacitor C2.

[0030] In the low-pass filter module, pins 1, 3, and 5 of terminal block J2 are all connected to ground GND; pins 7, 9, and 11 of terminal block J2 are respectively connected to one end of capacitor C2, one end of capacitor C1, and pin 16 of analog-to-digital converter U4; the other end of capacitor C1 is connected to the other end of capacitor C2 and ground GND.

[0031] The current transformer module includes resistors R1, R2, and R3, capacitors C3 and C4, current amplifier U1, resistors R7, R8, and R9, and capacitor C8.

[0032] In the current transformer module, one end of resistor R1 is connected to one end of resistor R2, pin 1 of terminal block J1, one end of resistor R7, and one end of resistor R8; the other end of resistor R1 is connected to one end of resistor R3, pin 2 of terminal block J1, the other end of resistor R7, and one end of resistor R9; the other end of resistor R8 is connected to one end of capacitor C8 and pin 6 of analog-to-digital converter U4; the other end of resistor R9 is connected to the other end of capacitor C8 and pin 7 of analog-to-digital converter U4; the other end of resistor R2 is connected to one end of capacitor C3 and pin 7 of current amplifier U1; the other end of resistor R3 is connected to the other end of capacitor C3 and pin 8 of current amplifier U1; pins 1 and 2 of current amplifier U1 are connected to capacitor C4 and pin 14 of analog-to-digital converter U1; the other end of capacitor C4 is connected to ground GND and pin 4 of current amplifier U1; and pin 3 of current amplifier U1 is connected to ground GND.

[0033] The amplification module includes resistor R4, resistor R5, amplifier U2, and capacitor C5.

[0034] In the amplification module, one end of resistor R4 is connected to pin 2 of terminal block J2; the other end of resistor R4 is connected to one end of resistor R5 and pin 3 of amplifier U2; pin 5 of amplifier U2 is connected to one end of capacitor C5 and the input power supply +5V; the other end of capacitor C5 is connected to ground GND; and pin 2 of amplifier U2 is connected to ground GND.

[0035] The acquisition module includes capacitor C7, resistor R6, capacitor C6, and analog switch U5.

[0036] In the acquisition module, analog switch U5 pin 16 is connected to terminal block J2 pin 10; analog switch U5 pin 17 is connected to terminal block J2 pin 8; analog switch U5 pin 18 is connected to terminal block J2 pin 12; analog switch U5 pin 2 is connected to current amplifier U1 pin 5; analog switch U2 pin 7 is connected to amplifier U2 pin 4 and pin 1; analog switch U2 pin 24 is connected to one end of capacitor C7 and analog-to-digital converter U4 pin 16 respectively; analog switch U5 pin 12 is connected to ground GND and the other end of capacitor C7 respectively; analog switch U5 pin 15 is connected to ground GND; analog switch U5 pin 1 is connected to one end of resistor R6; the other end of resistor R6 is connected to one end of capacitor C6 and the output terminal respectively; the other end of capacitor C6 is connected to ground GND.

[0037] Example 2: Based on the sheath circulation acquisition system proposed in Embodiment 1, Embodiment 2 further proposes a control method, the steps of which are as follows: First, capacitors C11 and C12 store the input power supply +5V as the instantaneous startup power supply for voltage regulator U3, and transmit it to voltage regulator U3 for voltage regulation. After voltage regulation, voltage regulator U3 outputs the voltage and sends it to analog-to-digital converter U4. The analog-to-digital converter U4 converts the input voltage signal into an output signal, which is then transmitted to various connected modules. Resistor R11 steps down the input power supply +5V, and resistor R10 provides supplementary voltage according to the power supply needs of the analog-to-digital converter U4, thereby meeting the power requirements of different pins of the analog-to-digital converter U4. Crystal oscillator Y1 modulates the signals received and transmitted by the analog-to-digital converter connected to U4. Terminal block J2 receives power from analog-to-digital converter U4, terminal block J1 receives power from the cable output and transmits it to current amplifier U1. Capacitors C1 and C2 store the power transmitted between analog-to-digital converter U4 and terminal block J2 and filter out a stable current, enabling terminal block J2 to acquire the instantaneous corresponding voltage when it is turned on again. Then, terminal block J2 transmits the received power to amplifier U2 and analog switch U5. At this time, terminal block J1 receives the output power from the cable. Through the connection of resistors R1, R2 and R3, the voltage and current in the output power are regulated, so that current amplifier U1 receives the shunt current and provides current to the inductive current load according to the current command. It also performs inductive processing on the received current and transmits the processed power to analog switch U5. Meanwhile, resistors R8 and R9 send the transmission signal between terminal block J1 and current amplifier U1 to analog-to-digital converter U4 for monitoring. At this time, resistor R4 reduces and regulates the voltage in the power supply transmitted by terminal block J2, resistor R5 is grounded to protect amplifier U2, amplifier U2 is powered on and stores the power transmitted through the connection path through capacitor C5, amplifier U2 performs impedance modulation on the current in the power supply transmitted by terminal block J2 to avoid unstable current output, and outputs the modulated current to analog switch U5. The analog switch U5 integrates the current supplied by terminal block J2 and current amplifier U1, and sets the on / off adjustment of analog switch U5. When the integrated output current exceeds the set range, analog switch U5 is turned on. When the integrated output current does not exceed the set range, analog switch U5 is in the off state. When it is turned on, the on command of analog switch U5 is output through resistor R6, thereby providing a remote prompt.

[0038] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A protective layer circulation acquisition system, characterized in that, Includes the following modules: A power supply module for providing a stable, stored output voltage to the control module and the amplification module; the power supply module includes capacitors C11, C12, C9, C10, and voltage regulator U3, wherein one end of capacitor C11 is connected to one end of capacitor C12, pin 1 of voltage regulator U3, and the input DC power supply +5V; the other end of capacitor C11 is connected to ground GND, along with the other end of capacitor C12; pin 3 of voltage regulator U3 is connected to ground GND; pin 2 of voltage regulator U3 is connected to one end of capacitor C9 and one end of capacitor C10; the other end of capacitor C9 is connected to ground GND, along with the other end of capacitor C10. A control module for the coordinated operation of a low-pass filter module, a current transformer module, an amplification module, and a data acquisition module; the control module includes an analog-to-digital converter U4, resistors R11 and R10, capacitors C15 and C16, a crystal oscillator Y1, capacitors C13 and C14, wherein one end of resistor R11 is connected to the input power supply +5V; the other end of resistor R11 is connected to one end of resistor R10, one end of capacitor C16, one end of capacitor C15, and pin 1 of analog-to-digital converter U4; the other end of resistor R10 is connected to the supplementary power supply 5V; The other end of capacitor C16 is connected to the other end of capacitor C15 and pin 3 of voltage regulator U3; pins 2, 3, 5, and 17 of analog-to-digital converter U4 are all connected to ground GND; pin 4 of analog-to-digital converter U4 is connected to pin 2 of voltage regulator U3; pin 19 of analog-to-digital converter U4 is connected to one end of crystal oscillator Y1 and one end of capacitor C13; the other end of capacitor C13 is connected to ground GND and one end of capacitor C14; the other end of capacitor C14 is connected to the other end of crystal oscillator Y1 and pin 18 of analog-to-digital converter U4. A low-pass filter module for filtering power transmitted through cables; the low-pass filter module includes terminal block J1, terminal block J2, capacitor C1, and capacitor C2, wherein pins 1, 3, and 5 of terminal block J2 are all connected to ground GND; pins 7, 9, and 11 of terminal block J2 are respectively connected to one end of capacitor C2, one end of capacitor C1, and pin 16 of analog-to-digital converter U4; the other end of capacitor C1 is connected to the other end of capacitor C2 and ground GND. A current transformer module for converting the current of power transmitted through a cable; the current transformer module includes resistors R1, R2, and R3, capacitors C3 and C4, a current amplifier U1, resistors R7, R8, and R9, and capacitor C8. One end of resistor R1 is connected to one end of resistor R2, pin 1 of terminal block J1, one end of resistor R7, and one end of resistor R8. The other end of resistor R1 is connected to one end of resistor R3, pin 2 of terminal block J1, the other end of resistor R7, and one end of resistor R9. The other end of resistor R8 is connected to one end of capacitor C8 and the module... The converter U4 pin 6 is connected; the other end of the resistor R9 is connected to the other end of the capacitor C8 and pin 7 of the analog-to-digital converter U4; the other end of the resistor R2 is connected to one end of the capacitor C3 and pin 7 of the current amplifier U1; the other end of the resistor R3 is connected to the other end of the capacitor C3 and pin 8 of the current amplifier U1; pins 1 and 2 of the current amplifier U1 are connected to the capacitor C4 and pin 14 of the analog-to-digital converter U1; the other end of the capacitor C4 is connected to ground GND and pin 4 of the current amplifier U1; pin 3 of the current amplifier U1 is connected to ground GND. An amplification module for impedance adjustment of the current output by the current transformer module; the amplification module includes resistor R4, resistor R5, amplifier U2, and capacitor C5, wherein one end of resistor R4 is connected to pin 2 of terminal block J2; the other end of resistor R4 is connected to one end of resistor R5 and pin 3 of amplifier U2; pin 5 of amplifier U2 is connected to one end of capacitor C5 and the input power supply +5V; the other end of capacitor C5 is connected to ground GND; pin 2 of amplifier U2 is connected to ground GND; An acquisition module for acquiring and integrating cable power transmission information; the acquisition module includes capacitor C7, resistor R6, capacitor C6, and analog switch U5, wherein pin 16 of analog switch U5 is connected to pin 10 of terminal block J2; pin 17 of analog switch U5 is connected to pin 8 of terminal block J2; pin 18 of analog switch U5 is connected to pin 12 of terminal block J2; pin 2 of analog switch U5 is connected to pin 5 of current amplifier U1; pin 7 of analog switch U2 is connected to pins 4 and 1 of amplifier U2; pin 24 of analog switch U2 is connected to one end of capacitor C7 and pin 16 of analog-to-digital converter U4; pin 12 of analog switch U5 is connected to ground GND and the other end of capacitor C7; pin 15 of analog switch U5 is connected to ground GND; pin 1 of analog switch U5 is connected to one end of resistor R6; the other end of resistor R6 is connected to one end of capacitor C6 and the output terminal; the other end of capacitor C6 is connected to ground GND.

2. The control method of the protective layer circulation acquisition system according to claim 1, characterized in that, Includes the following steps: Step 1: Capacitors C11 and C12 store the input power supply +5V as the instantaneous startup power supply for voltage regulator U3, and transmit it to voltage regulator U3 for voltage regulation. After voltage regulation, voltage regulator U3 outputs the voltage and sends it to analog-to-digital converter U4. Step 2: The analog-to-digital converter U4 converts the input voltage signal into an output signal and transmits it to each connected module. Resistor R11 steps down the input power supply +5V. Resistor R10 provides supplementary voltage according to the power supply needs of the analog-to-digital converter U4, thereby meeting the power requirements of different pins of the analog-to-digital converter U4. Crystal oscillator Y1 modulates the signals received and transmitted by the analog-to-digital converter connected to U4. Step 3: Terminal block J2 receives power from analog-to-digital converter U4, terminal block J1 receives power from the cable output and transmits it to current amplifier U1. Capacitors C1 and C2 store the power transmitted between analog-to-digital converter U4 and terminal block J2 and filter out stable current. When the circuit is turned on again, terminal block J2 can obtain the instantaneous corresponding voltage. Then, the received power is transmitted to amplifier U2 and analog switch U5 through terminal block J2. Step 4: Terminal block J1 receives the output power from the cable. Through the connection of resistors R1, R2, and R3, the voltage and current in the output power are regulated, so that current amplifier U1 receives the shunt current. According to the current command, it provides current to the inductive current load, performs inductive processing on the received current, and transmits the processed power to analog switch U5. Meanwhile, resistors R8 and R9 send the transmission signal between terminal block J1 and current amplifier U1 to analog-to-digital converter U4 for monitoring. Step 5: Resistor R4 reduces and regulates the voltage in the power supply transmitted by terminal block J2, resistor R5 is grounded to protect amplifier U2, amplifier U2 is powered on, and the power transmitted through the connection path is stored through capacitor C5. Amplifier U2 performs impedance modulation on the current in the power supply transmitted by terminal block J2 to avoid unstable current output, and outputs the modulated current to analog switch U5. Step 6: The current supplied by terminal block J2 and current amplifier U1 is integrated through analog switch U5, and the on / off adjustment of analog switch U5 is set. When the integrated output current exceeds the set range, analog switch U5 is turned on. When the integrated output current does not exceed the set range, analog switch U5 is in the off state. When it is in the on state, the on command of analog switch U5 is output through resistor R6 for remote prompting.

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