Signal transmission method of water quality adjusting system

Abstract

According to the signal transmission method of the water quality adjusting system, the high-frequency signal and the first control signal are modulated to generate the wireless transmission signal, so that wireless transmission of the wireless transmission signal and the electric energy is realized; meanwhile, a first control signal in the wireless transmission signal is extracted and output to control the magnitude of the current on the electrode plate, so that the electrolysis efficiency of the generator is controlled; besides, the power supply on-off of the wireless receiving device is controlled through a second control signal carrying the working state information of the generator, so that the control panel can restore and obtain the second control signal and control the state indicating device according to the output current change caused by the power supply on-off of the wireless receiving device. Therefore, the water quality monitoring system can complete bidirectional transmission of the information only by relying on an original two-line circuit, a communication circuit does not need to be additionally arranged, the wiring of the system is simplified, and the use cost of the system is reduced.

Description

Technical Field

[0001] This invention relates to the field of water quality regulation technology, and in particular to a signal transmission method for a water quality regulation system. Background Technology

[0002] In water use scenarios such as swimming pools and bathtubs, water quality and safety are paramount, directly impacting the health of users. To maintain stable water quality, a closed-loop disinfection system typically consists of a water quality probe, a controller, and a chlorine generator. In this system, the controller adjusts the chlorine production of the chlorine generator based on monitoring data from the water quality probe (such as an ORP probe) to achieve precise chlorination. However, existing signal transmission and control methods have significant shortcomings, limiting the system's reliability and level of intelligence.

[0003] Currently, most systems employ a one-way communication mode, where the controller can only send commands to the chlorine generator but cannot read critical feedback information such as its actual operating current, voltage, or fault status. This "send-only" mode creates a control blind spot; if the chlorine generator malfunctions according to commands, the system cannot detect it in time, posing a risk of insufficient disinfection or excessive chemicals. Furthermore, traditional connection methods typically require separate power and signal lines for the chlorine generator. This multi-wire solution not only increases wiring costs and installation complexity but also makes the interfaces and wiring more susceptible to failure due to moisture, corrosion, or electromagnetic interference. Although attempts have been made to simplify wiring, such as using only two wires for power supply and one-way command transmission, the technical bottleneck of bidirectional transmission has not been overcome. The controller cannot obtain the chlorine generator's operating status through the same line, thus failing to fundamentally improve system reliability.

[0004] Therefore, it is necessary to provide a signal transmission method for water quality conditioning systems that can achieve reliable two-way communication while simplifying the wiring. Summary of the Invention

[0005] To address the technical problems of complex and costly information transmission lines in existing water quality regulation systems, which only enable one-way information transmission, this invention provides a signal transmission method for water quality regulation systems.

[0006] A signal transmission method for a water quality conditioning system, the water quality conditioning system comprising a control panel and a water quality detector electrically connected to the control panel and a generator for electrolyzing sodium hypochlorite or chlorine gas; the generator comprising a wireless transmitter, a wireless receiver corresponding to the wireless transmitter, and a plurality of electrode plates electrically connected to the wireless receiver. The signal transmission method includes: Step S1: Acquiring water quality data through a water quality detector and wirelessly transmitting it to the control panel; wherein the detection data includes, but is not limited to, one or more of the water's ORP value, salinity value, or temperature value; Step S2: The control panel receives and analyzes the water quality data, acquires the water quality status, generates a corresponding first control signal, and outputs it to the wireless transmitting device; wherein the first control signal is used to control the electrolysis efficiency of the generator; Step S3: The wireless transmitting device generates a high-frequency signal of a predetermined frequency and integrates the received first control signal into the high-frequency signal to form a wireless transmission signal and transmits it to the wireless receiving device; Step S4: ... After receiving the wireless transmission signal, the wireless receiving device generates an electrical drive output to power the electrode plate; simultaneously, it performs detection processing on the wireless transmission signal to obtain the first control signal and outputs the control signal to control the magnitude of the current on the electrode plate, thereby controlling the electrolysis efficiency of the generator; Step S5: The wireless receiving device acquires the current operating status information of the generator and generates a second control signal according to the operating status information, and then controls the rapid switching on and off of the power supply of the wireless receiving device according to the second control signal; Step S6: The control panel detects the change in output current caused by the switching on and off of the power supply of the wireless receiving device, acquires the operating status information carried by the second control signal, and triggers the corresponding status indicator device on the control panel according to the operating status information.

[0007] Preferably, the water quality detector includes a first MCU controller, a salinity probe, an ORP probe, a temperature probe, and a wireless signal transmission module; and the output terminal of the ORP probe is connected to the first MCU controller through an impedance conversion circuit; step S1 specifically involves: the first MCU controller controlling the salinity probe, ORP probe, and temperature probe to power on in a time-sharing manner, and causing the impedance conversion circuit to output a high impedance state when the ORP probe is powered on and a low impedance state when the ORP probe is powered off, thereby obtaining the salinity, ORP value, and temperature value of the water body from the salinity probe, ORP probe, and temperature probe respectively, and outputting them to the first MCU controller, and then to the control panel through the wireless signal transmission module.

[0008] Preferably, the impedance conversion circuit includes a first operational amplifier, the output terminal and the inverting input terminal of the first operational amplifier are respectively connected to the first detection input terminal of the first MCU controller, the non-inverting input terminal is connected to the output terminal of the ORP probe and grounded, the positive terminal of the first operational amplifier is connected to an external power supply, and the negative terminal is grounded; the first MCU controller controls the power supply of the ORP probe to make the output terminal of the first operational amplifier present a high impedance state or a low impedance state.

[0009] Preferably, the control panel includes a second MCU controller, a wireless signal receiving module, and a switching device electrically connected to the second MCU controller; the switching device is used to control the on / off state of the control panel output to the wireless transmitting device; step S2 specifically involves: after the second MCU controller receives the detection data of the water body through the wireless signal receiving module, it analyzes and obtains the water quality state of the water body and generates a corresponding first control signal, outputting a control to turn the switching device on / off, thereby controlling the on / off state of the control panel output to the wireless transmitting device; the wireless transmitting device reconstructs and obtains the first control signal according to the on / off timing of the output; wherein, the first control signal includes the switching signals of several switching devices, and the timing arrangement of the switching signals matches the electrolysis efficiency of the generator corresponding to the water quality state.

[0010] Preferably, the wireless transmitting device includes a third MCU controller and a high-frequency signal generation module and a power amplification module electrically connected to the third MCU controller, respectively. The power amplification module is electrically connected to a transmitting coil. Step S3 specifically involves: the third MCU controller detecting voltage changes caused by the on / off switching of the control panel output and acquiring the first control signal; the high-frequency signal generation module generating a high-frequency signal of a predetermined frequency; the third MCU controller integrating the first control signal into the high-frequency signal to form a wireless transmission signal, which is then amplified by the power amplification module and transmitted to the wireless receiving device through the transmitting coil.

[0011] Preferably, the control panel further includes a current signal conversion module; the current signal conversion module includes a sampling resistor and a comparator, the first end of the sampling resistor is connected to the switching device and the non-inverting input of the comparator respectively, the second end is grounded, and the non-inverting input of the comparator is grounded, the inverting input of the comparator is grounded through a resistor R1 and connected to an external power supply through a resistor R2; the output of the comparator is connected to the second MCU controller; step S6 specifically involves: the switching device remaining on; the power supply switching of the wireless receiving device causes a change in the current flowing through the sampling resistor, generating a changing voltage; the comparator acquires the changing voltage and compares it with a preset voltage threshold, outputting a high-level or low-level signal to the second MCU controller; the second MCU controller acquires the operating status information carried by the second control signal according to the timing of the received high-level or low-level signal change, and triggers the corresponding status indicator device on the control panel according to the operating status information.

[0012] Preferably, the wireless receiving device includes a fourth MCU controller and a receiving coil and a signal feedback module electrically connected to the fourth MCU controller respectively; the signal feedback module includes a P-MOS transistor and a transistor; the source of the P-MOS transistor is connected to the first end of the receiving coil, the gate is connected to the collector of the transistor, and the drain is electrically connected to the electrode plate; the base of the transistor is electrically connected to the fourth MCU controller, and the transmitter is grounded; in step S5, the second control signal consists of several high-level signals and low-level signals arranged in a specific timing sequence; the fourth MCU controller generates the second control signal and outputs high-level signals or low-level signals in sequence, thereby controlling the P-MOS transistor to turn on or off through the transistor, and controlling the power supply to the electrode plate.

[0013] Preferably, the wireless receiving device further includes a rectifier and filter module, a constant voltage and constant current module, a polarity reversal module, and a sampling control module; the rectifier and filter module is electrically connected to the receiving coil and to the constant voltage and constant current module through the signal feedback module; the constant voltage and constant current module is electrically connected to the electrode plate through the polarity reversal module; the polarity reversal module is electrically connected to the fourth MCU controller through the sampling control module, and the sampling control module is electrically connected to the constant voltage and constant current module; the receiving coil wirelessly receives electrical energy from the wireless transmitting device and generates AC power; the rectifier and filter module rectifies the AC power into DC power and outputs a DC voltage to the constant voltage and constant current module; the fourth MCU controller controls the power supply connection and disconnection between the receiving coil and the constant voltage and constant current module through the signal feedback module; the constant voltage and constant current module... The module boosts / bucks the DC voltage output by the rectifier and filter module into a constant voltage and outputs it to the electrode plate. The reversing module is electrically connected to the first and second level output terminals of the fourth MCU controller, and the two output terminals of the reversing module are electrically connected to the electrode plate. The fourth MCU controller controls the first and second level output terminals to output high or low levels, and periodically switches the polarity of the output levels of the first and second level output terminals, thereby driving the reversing module to periodically switch the polarity of the two output terminals to perform timed reversing of the electrode plate. The sampling control module is used to acquire the current of the reversing module and generate a dynamic voltage to the constant voltage and constant current module. The constant voltage and constant current module changes its voltage output value according to the dynamic voltage to keep the current received by the electrode plate constant.

[0014] Preferably, the wireless receiving device further includes a detection module. In step S4, the specific process of detecting the wireless transmission signal is as follows: the detection module receives the wireless transmission signal output by the receiving coil, then rectifies the wireless transmission signal, filters out high-frequency signals, and obtains the first control signal; wherein, the detection module includes diodes D1, D2, and D3, resistors R3, R4, R5, and R6, capacitors C1 and C2; the anode of diode D1 is connected to the receiving coil, and the cathode is connected to capacitor C1; resistor R3... The resistors R4 and R5 are connected in parallel across the capacitor C1; the other end of resistor R4 is connected to the first end of resistor R3, and the other end of resistor R5 is connected to the second end of resistor R3; the anode of diode D2 and the cathode of diode D3 are connected together and connected to resistor R6; the other end of resistor R6 is connected to the fourth MCU controller and the first end of capacitor C2 respectively; the cathode of diode D2 is connected to the first end of resistor R5, and the anode of diode D3 is connected to the second end of resistor R5 and the second end of capacitor C2 respectively, and is grounded.

[0015] Preferably, the output terminal of the constant voltage and constant current module is also electrically connected to a voltage detection module; the voltage detection module includes resistors R7 and R8 and capacitor C1, resistors R7 and R8 are connected in series, and one end of R7 is connected to the output terminal of the constant voltage and constant current module, and the other end is connected to resistor R8 and the fourth MCU controller respectively; the other end of resistor R8 is grounded, and capacitor C3 is connected in parallel across resistor R8; the fourth MCU controller obtains the working voltage of the electrode plate through the voltage detection module.

[0016] The beneficial effects of this invention are as follows: The signal transmission method of the water quality conditioning system provided by this invention generates a wireless power transmission signal by modulating a high-frequency signal of a predetermined frequency and a first control signal used to control the electrolysis efficiency of the generator. Then, the wireless power transmission signal and electrical energy are wirelessly transmitted through the cooperation of a wireless receiving device and a wireless transmitting device. At the same time, the electrolysis efficiency of the generator is controlled by extracting the first control signal from the wireless power transmission signal and outputting it to control the current on the output control electrode. Without the need for a complex data encoding and decoding process, the first control signal is synchronized with the energy consumption of the generator, achieving maximum power transmission of wireless power. In addition, the power supply to the wireless receiving device is controlled by a second control signal carrying the generator's operating status information. The control panel can then reconstruct the second control signal and control the status indicator device based on the output current changes caused by the power supply to the wireless receiving device. This enables information transmission from the generator to the control panel, allowing the water quality monitoring system to complete bidirectional information transmission using only the existing two-wire lines without the need for additional communication lines. This simplifies system wiring and reduces system operating costs. Attached Figure Description

[0017] Figure 1 This invention provides a schematic diagram of the structure of a water quality regulation system; Figure 2 This is a schematic diagram of the generator provided by the present invention; Figure 3 A schematic diagram of the circuit structure of the control panel provided by the present invention; Figure 4 A schematic diagram of the circuit structure of the current signal conversion module provided by the present invention; Figure 5 A schematic diagram of the circuit structure of the impedance conversion circuit, ORP probe, and first power supply control circuit provided by the present invention; Figure 6 A schematic diagram of the circuit structure of the salinity detection probe and the second power supply control circuit provided by the present invention; Figure 7 A schematic diagram of the circuit structure of the first MCU controller, temperature probe, and wireless signal transmission module provided for this invention; Figure 8 A schematic diagram of the circuit structure of the wireless transmitting device provided by the present invention; Figure 9 A schematic diagram of the circuit structure of the wireless receiving device provided by the present invention; Figure 10 A schematic diagram of the circuit structure of the detection module provided by the present invention; Figure 11 A schematic diagram of the circuit structure of the voltage detection module provided by the present invention; Figure 12 This is a schematic flowchart of a signal transmission method for a water quality conditioning system provided by the present invention.

[0018] Attached Figure Labels 1. Control panel; 101. Status indicator; 102. Second MCU controller; 103. Wireless signal receiving module; 104. Switching device; 105. Current signal conversion module; 1051. Sampling resistor; 1052. Comparator; 2. Water quality detector; 21. First MCU controller; 22. Salinity probe; 23. ORP probe; 24. Temperature probe; 25. Wireless signal transmitting module; 26. Impedance conversion circuit; 27. First power supply control circuit; 28. First power supply control circuit; 3. Generator 31. Wireless transmitter; 311. Third MCU controller; 312. High-frequency signal generation module; 313. Power amplifier module; 314. Transmitting coil; 315. Signal recognition module; 32. Wireless receiver; 321. Fourth MCU controller; 322. Receiving coil; 323. Signal feedback module; 324. Rectifier and filter module; 325. Constant voltage and constant current module; 326. Reverse polarity module; 327. Sampling control module; 328. Detector module; 329. Voltage detection module; 33. Electrode sheet. Detailed Implementation

[0019] To provide a more detailed description of the present invention, the following description is provided in conjunction with the accompanying drawings. It should be noted that the embodiments described below are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] refer to Figure 1 and Figure 2 As shown, a water quality conditioning system includes a control panel 1, a water quality detector 2 electrically connected to the control panel 1, and a generator 3 for electrolyzing sodium hypochlorite or chlorine gas; the generator 3 includes a wireless transmitter 31, a wireless receiver 32 corresponding to the wireless transmitter 31, and a plurality of electrode plates 33 electrically connected to the wireless receiver 32.

[0021] Specifically, refer to Figure 12 As shown, this embodiment provides a signal transmission method for a water quality conditioning system applicable to the water quality conditioning system. The signal transmission method includes: Step S1: Obtain water quality detection data through water quality detector 2 and transmit it wirelessly to control panel 1; wherein, the detection data includes, but is not limited to, one or more of the water body's ORP value, salinity value, or temperature value.

[0022] In this embodiment, the water quality detector 2 can detect the ORP value, salinity value and temperature value of the water body respectively, and generate corresponding signals based on the detection data, and wirelessly transmit them to the control panel 1.

[0023] Step S2: The control panel 1 receives and analyzes the detection data of the water body, obtains the water quality status of the water body and generates a corresponding first control signal, which is then output to the wireless transmitter 31; wherein, the first control signal is used to control the electrolysis efficiency of the generator 3.

[0024] Salinity is the total amount of dissolved salts in water. Excessive salinity reduces water solubility, leading to impurity deposition and equipment corrosion, while insufficient salinity affects disinfection effectiveness. ORP (Oxidation Reduction Potential) reflects the water's oxidation capacity, ensuring that disinfectants such as chlorine effectively kill bacteria and preventing bacterial growth at low ORP values. Temperature reflects the water's temperature and corrects and compensates for the original ORP value obtained by the ORP probe 23. In this embodiment, based on the water's ORP, salinity, and temperature values, the control panel 1 can identify the water quality state reflected by these detection data according to a preset program, generate an electrolysis efficiency of the generator 3 matching the water quality state, and then generate a corresponding first control signal, which is transmitted to the wireless transmitter 31, realizing information transmission from the water quality detector 2 to the control panel 1 and then to the generator 3.

[0025] Step S3: The wireless transmitting device 31 generates a high-frequency signal of a predetermined frequency and integrates the received first control signal into the high-frequency signal to form a wireless transmission signal and transmit it to the wireless receiving device 32.

[0026] By generating a high-frequency signal at a predetermined frequency and directly integrating the first control signal onto the high-frequency signal, the non-generated wire-transmitted electrical signal can be transmitted within a specific frequency band, improving the anti-interference capability and transmission efficiency of the signal transmission; and eliminating the need for a dedicated external communication network, thus simplifying system wiring. Furthermore, the simultaneous occurrence of the first control signal and energy transmission effectively reduces signal transmission delay and improves energy utilization.

[0027] Step S4: After receiving the wireless transmission signal, the wireless receiving device 32 generates an electrical drive output to power the electrode plate 33; at the same time, it performs detection processing on the wireless transmission signal to obtain the first control signal, and outputs the control signal to control the magnitude of the current on the electrode plate 33, thereby controlling the electrolysis efficiency of the generator 3.

[0028] By modulating a high-frequency signal of a predetermined frequency with a first control signal to generate a wireless power transmission signal, wireless power transmission of the signal and electrical energy is achieved through the cooperation of the wireless receiver 32 and the wireless transmitter 31. Simultaneously, by extracting the first control signal from the wireless power transmission signal and outputting it to control the current on the output control electrode 33, the electrolysis efficiency of the generator 3 is controlled. This achieves information transmission between the wireless transmitter 31 and the wireless receiver 32 without the need for complex data encoding and decoding processes, saving related electronic components. It also synchronizes the first control signal with the energy consumption of the generator, achieving maximum power transmission of wireless power without the need for complex communication lines, thus saving information transmission costs.

[0029] Step S5: The wireless receiving device 32 acquires the current operating status information of the generator 3, and generates a second control signal based on the operating status information, thereby controlling the rapid switching of power supply to the wireless receiving device 32 according to the second control signal. In this embodiment, the operating status information of the generator includes the generator's start / stop status, the operating current and voltage of the electrode plates, and the electrode plate lifespan calculated based on the electrode plate operating records.

[0030] The wireless receiver 32 can acquire various operating status information of the generator through the built-in detection module, and generate a second control signal that can be used to control the rapid switching on and off of the power supply of the wireless receiver 32 based on the operating status information, and transmit it, so that the second control signal can be acquired according to the rapid switching on and off of the power supply of the wireless receiver 32.

[0031] Step S6: The control panel 1 detects the change in output current caused by the power supply switching of the wireless receiver 32, obtains the operating status information carried by the second control signal, and triggers the corresponding status indicator 101 on the control panel 1 according to the operating status information. In this embodiment, the status indicator 101 may be an indicator light, a display screen, etc.

[0032] Control panel 1 detects the change in output current caused by the power supply interruption of wireless receiver 32, restores the working status information carried by the second control signal, and controls status indicator 101, realizing the information feedback from generator 3 to control panel 1. This allows the water quality monitoring system to complete bidirectional information transmission using only the original two-wire line without the need for additional communication lines, which simplifies system wiring and reduces system operating costs.

[0033] In this embodiment, reference Figure 5 , Figure 6 and Figure 7As shown, the water quality detector 2 includes a first MCU controller 21, a salinity probe 22, an ORP probe 23, a temperature probe 24, and a wireless signal transmission module 25; and the output terminal of the ORP probe 23 is connected to the first MCU controller 21 through an impedance conversion circuit 26. In this embodiment, the detection terminals of the salinity probe 21 are in direct contact with the water body during detection and can be a pair of electrodes, detecting the water salinity through TDS (conductivity method). The detection terminals of the ORP probe 23 are used to directly contact the water body, detecting the oxidation-reduction potential of the water body and converting it into a corresponding electrical signal, thereby obtaining the ORP value of the water body. The detection terminals of the temperature probe 24 can be a thermistor, which can convert changes in water temperature into changes in resistance and generate a corresponding electrical signal, thereby obtaining the temperature value of the water body.

[0034] Step S1 specifically involves the first MCU controller 21 controlling the salinity probe 22, ORP probe 23, and temperature probe 24 to power on in a time-sharing manner. The impedance conversion circuit 26 outputs a high impedance state when the ORP probe 23 is powered on and a low impedance state when the ORP probe 23 is powered off. After the salinity probe 22, ORP probe 23, and temperature probe 24 acquire the salinity, ORP value, and temperature value of the water body, respectively, they are output to the first MCU controller 21 and transmitted to the control panel 1 via the wireless signal transmission module 25. After acquiring the salinity, ORP value, and temperature value of the water body, the first MCU controller 21 can automatically correct and compensate the original ORP detection value acquired by the ORP probe 23 according to a preset program based on the measured temperature value, ultimately obtaining a more accurate water ORP value, which is then output to the control panel 1 along with the salinity and temperature values.

[0035] The impedance conversion circuit 26 includes a first operational amplifier. The output terminal and the inverting input terminal of the first operational amplifier are respectively connected to the first detection input terminal of the first MCU controller 21, and the non-inverting input terminal is connected to the output terminal of the ORP probe 23 and grounded. The positive terminal of the first operational amplifier is connected to an external power supply, and the negative terminal is grounded. The first MCU controller 21 controls the power supply of the ORP probe 23 to make the output terminal of the first operational amplifier present a high impedance state or a low impedance state.

[0036] When the ORP probe 3 stops detecting, it is powered off to ensure that it is not connected to the power supply module 5 when not detecting, thus preventing it from interfering with the salinity probe 2's detection through the water being tested. Specifically, the first MCU controller 21 controls the ORP probe 23 to be powered off, thereby causing the output of the first operational amplifier to be in a high-impedance state. This ensures that when the ORP probe 23 is not detecting, the salinity probe 22, through the loop formed by the water and the ORP probe 23, is in a high-impedance state, preventing the formation of an additional electrical signal path that interferes with TDS detection through the water itself. This avoids affecting the salinity probe 22's detection and helps improve the accuracy of salinity detection. When the ORP probe 23 is powered on, the output of the first operational amplifier is in a low-impedance state, allowing the ORP probe 23 to output relevant electrical signals normally. In actual use, after the water quality detector 1 is powered on, the temperature probe 24 starts to acquire the water temperature; the power supply of the salinity probe 22 and the ORP probe 23 is controlled separately by the first MCU controller 21.

[0037] Specifically, refer to Figure 2 As shown, the first MCU controller 21 is electrically connected to the salinity probe 22 and the ORP probe 23 through the first power supply control circuit 27 and the second power supply circuit 28, respectively. It then outputs different polarity levels to the first power supply control circuit 27 and the second power supply circuit 28 to control the switching of the transistors in the power supply circuit, thereby realizing the control of the power supply on and off of the salinity probe 22 and the ORP probe 23.

[0038] refer to Figure 7 As shown, the wireless signal transmission module 25 includes a wireless transmission chip. The DATA pin of the wireless transmission chip is connected to the detection data output terminal of the first MCU controller 21. The XTAL pin of the wireless transmission chip is grounded through a crystal oscillator, the GND pin is grounded, and the RFO pin is connected to a capacitor C4, a second inductor, a third inductor, and a transmitting antenna in sequence. The second inductor and the third inductor are grounded through a capacitor C4. The VCC pin of the wireless transmission chip is connected to the input terminal of a power supply module 5 for supplying power to the salinity probe 22, the ORP probe 23, the temperature probe 24, and the wireless signal transmission module 25. It is grounded through a capacitor C5 and connected to the RFO pin of the wireless transmission chip through a fourth inductor.

[0039] The first MCU controller 21 inputs the encoded signal carrying the detection data of ORP probe 23, salinity probe 22, and temperature detection probe 25 into the wireless transmitter chip through the detection data output terminal. The wireless transmitter chip uses an external crystal oscillator to generate a stable high-frequency carrier signal and loads the encoded signal onto the carrier signal through modulation technology. After modulation, the generated radio frequency signal is output through the RFO pin, and then impedance matching and filtering are performed by a network composed of inductors and capacitors. Finally, the radio frequency signal is radiated out in the form of electromagnetic waves through the antenna to realize the wireless transmission of detection data.

[0040] refer to Figure 3 As shown, the control panel 1 includes a second MCU controller 102, a wireless signal receiving module 103 and a switching device 104, which are electrically connected to the second MCU controller 102 respectively; the switching device is used to control the on / off state of the output from the control panel 1 to the wireless transmitting device 31.

[0041] Step S2 specifically involves the following steps: After receiving the water body detection data through the wireless signal receiving module 103, the second MCU controller 102 analyzes and obtains the water quality status of the water body and generates a corresponding first control signal, outputting control over the on / off state of the switching device 104, thereby controlling the on / off state of the control panel 1 outputting to the wireless transmitting device 31; the wireless transmitting device 31 reconstructs and obtains the first control signal based on the on / off timing of the output; wherein, the first control signal includes the switching signals of several switching devices 104, and the timing arrangement of the switching signals matches the electrolysis efficiency of the generator 3 corresponding to the water quality status.

[0042] The second MCU controller 12 controls the switching of the control panel 1 to the wireless transmitter 31 by inputting a number of switching signals according to a specific timing sequence. These multiple switching signals form a series of control commands carrying the generator's electrolysis efficiency matched to the water quality. These control commands are transmitted to the wireless transmitter 31 during the rapid switching of the switching device 104. The wireless transmitter 31 acquires the control commands carried by the switching of the switching device 104, reconstructs these commands, and thus obtains the first control signal used to control the electrolysis efficiency of the generator 3.

[0043] By utilizing existing power supply lines to transmit the first control signal, line reuse for power supply and data communication is achieved, eliminating the need for dedicated data communication lines, reducing system complexity and manufacturing costs, and improving reliability.

[0044] In this embodiment, the switching device 104 is an N-MOS transistor. The second MCU controller 102 outputs high and low level signals as switching signals to control the on / off state of the N-MOS transistor, thereby controlling the on / off state of the output from the control panel 1 to the wireless transmitting device 31. The wireless signal receiving module 103 is matched with the wireless signal transmitting module 25. It receives the detection signal carrying water body detection data transmitted by the wireless signal transmitting module 25 through a receiving antenna. The received detection signal is amplified, filtered, and demodulated by the wireless receiving chip and its circuitry before being sent to the second MCU controller 12 for interpretation and analysis, thereby obtaining the water quality status of the water body.

[0045] refer to Figure 8 As shown, the wireless transmitting device 31 includes a third MCU controller 311 and a high-frequency signal generating module 312 and a power amplification module 313, which are electrically connected to the third MCU controller 311 respectively. The power amplification module 313 is electrically connected to a transmitting coil 314.

[0046] Specifically, step S3 involves the third MCU controller 311 detecting voltage changes caused by the on / off switching of the control panel 1 and acquiring the first control signal; the high-frequency signal generation module 312 generating a high-frequency signal of a predetermined frequency; the third MCU controller 311 integrating the first control signal into the high-frequency signal to form a wireless transmission signal, which is then amplified by the power amplifier module 313 and transmitted to the wireless receiver 32 through the transmitting coil 314.

[0047] Optionally, the wireless transmitting device 31 includes a signal identification module 315 to detect voltage changes caused by the switching on and off of the output of the control panel 1. The signal identification module 315 includes a resistor R9 and a resistor R10, with the first end of resistor R9 connected to the output terminal of the control panel 1, the second end of resistor R9 connected to the first end of resistor R10 and the third MCU controller 311, and the second end of resistor R10 grounded.

[0048] When the output from control panel 1 to wireless transmitter 31 is on, the output of control panel 1 applies a higher voltage to the input of signal recognition module 315. This high voltage is then divided by resistors R9 and R10 to output a high-level signal, which is recognized by the third MCU controller 311. Conversely, when the output from control panel 1 to wireless transmitter 31 is off, the output of control panel 1 applies a lower voltage to the input of signal recognition module 315. This low voltage is then divided by resistors R9 and R10 to output a low-level signal, which is then used by the third MCU controller 311 to reconstruct and obtain the first control signal based on the timing of the received high-level and low-level signals.

[0049] By modulating the first control signal and the high-frequency signal to generate a wireless power transmission signal and amplifying it for output, wireless power transmission of the signal and electrical energy is achieved through the cooperation of the transmitting coil 314 and the wireless receiving device 32. This simplifies the system design and avoids the complexity and cost of setting up a separate communication module. The process of modulating the first control signal and the high-frequency signal into a wireless power transmission signal can be implemented through preset programming within the third MCU controller 311.

[0050] The high-frequency signal generation module 312 mainly consists of a crystal oscillator and capacitors. Through the piezoelectric effect of the crystal oscillator and the positive feedback amplification principle, a precise and stable high-frequency signal is generated after the high-frequency signal generation module 312 is powered on and sent to the third MCU controller 311. The frequency of this high-frequency signal is adjustable. The power amplification module 313 mainly consists of a power amplification chip and resistors R11 and R12. The wireless transmission signal is sent to the input terminal of the power amplification chip, where it is amplified internally. The amplification process is stabilized by the negative feedback network composed of resistors R11 and R12, and finally, an amplified wireless transmission signal is output from the output terminal of the power amplification module 313, enabling the amplified wireless transmission signal to effectively drive the transmitting coil 314.

[0051] refer to Figure 3 and Figure 4 As shown, the control panel 1 further includes a current signal conversion module 105; the current signal conversion module 105 includes a sampling resistor 1051 and a comparator 1052. The first end of the sampling resistor 1051 is connected to the switching device 104 and the non-inverting input of the comparator 1052 respectively, and the second end is grounded. The non-inverting input of the comparator 1052 is grounded, and the inverting input of the comparator 1052 is grounded through a resistor R1 and connected to an external power supply through a resistor R2. The output of the comparator 1052 is connected to the second MCU controller 102.

[0052] Step S6 specifically involves: the switching device 104 remaining on; the power supply switching of the wireless receiving device 32 causing a change in the current flowing through the sampling resistor 1051, generating a changing voltage; the comparator 1052 acquiring the changing voltage and comparing it with a preset voltage threshold, outputting a high-level or low-level signal to the second MCU controller 102; the second MCU controller 102 acquiring the operating status information carried by the second control signal according to the timing of the received high-level or low-level signal changes, and triggering the corresponding status indicator device on the control panel according to the operating status information.

[0053] Specifically, when the power supply to the wireless receiver 32 is disconnected, the load on the output terminal of the control panel 1 decreases, resulting in a smaller output current. The current flowing through the sampling resistor 1051 also decreases, causing the output voltage change to decrease, which is denoted as the first voltage change. Similarly, when the power supply to the wireless receiver 32 is turned on, the current flowing through the sampling resistor 1051 increases, resulting in a larger output voltage change, which is denoted as the second voltage change. The first voltage change and the second voltage change are compared with preset voltage thresholds, and corresponding high-level and low-level signals are output to the second MCU controller 102. In different power on / off sequences of the wireless receiver 32, the timing of the high-level or low-level signal changes is different, representing signals of different generator operating states. The second MCU controller 102 identifies the different timing of the level changes, restores the signal to the second control signal, and then interprets and obtains the operating state of the generator.

[0054] By setting the current signal conversion module 105, the operating status information of the generator 3 obtained by the wireless receiver 32 can be transmitted back to the control panel 1 for reading. There is no need to establish a dedicated communication line, which helps to reduce system complexity and save costs.

[0055] refer to Figure 9 As shown, the wireless receiving device 32 includes a fourth MCU controller 321 and a receiving coil 322 and a signal feedback module 323, which are electrically connected to the fourth MCU controller 321 respectively.

[0056] The signal feedback module 323 includes a P-MOS transistor Q1 and a transistor Q2; the source of the P-MOS transistor Q1 is connected to the first end of the receiving coil 322, the gate is connected to the collector of the transistor Q2, and the drain is electrically connected to the electrode plate 33; the base of the transistor Q2 is electrically connected to the fourth MCU controller 321, and the emitter is grounded.

[0057] In step S5, the second control signal consists of several high-level and low-level signals arranged in a specific timing sequence; these high-level and low-level signals represent different operating states of the generator 3. The fourth MCU controller 321 generates the second control signal and outputs high-level or low-level signals sequentially, thereby controlling the P-MOS transistor Q1 to turn on or off through the transistor Q2, and controlling the power supply to the electrode plate 33.

[0058] Specifically, when the fourth MCU controller 321 outputs a high-level signal, both transistor Q2 and P-MOS transistor Q1 are turned on, supplying power to electrode plate 33; when the fourth MCU controller 321 outputs a low-level signal, both transistor Q2 and P-MOS transistor Q1 are turned on, disconnecting the power supply path to electrode plate 33.

[0059] The signal feedback module 323 enables rapid control of the power supply to and from the electrode 33. This power supply to and from the electrode 33 causes a change in the load at the output of the control panel 1, thereby controlling the change in the output current of the control panel 1. This can then work in conjunction with the current signal conversion module 105 to identify the change in current, ultimately enabling the wireless receiver 32 to transmit the generator 3's operating status information back to the control panel 1. No dedicated communication transmission line is required; bidirectional information transmission can be achieved using only the existing two-wire system, resulting in low information transmission costs and reduced system complexity.

[0060] The wireless receiving device 32 further includes a rectifier and filter module 324, a constant voltage and constant current module 325, a polarity reversal module 326, and a sampling control module 327. The rectifier and filter module 324 is electrically connected to the receiving coil 322 and is electrically connected to the constant voltage and constant current module 325 through the signal feedback module 323. The constant voltage and constant current module 325 is electrically connected to the electrode plate 33 through the polarity reversal module 326. The polarity reversal module 326 is electrically connected to the fourth MCU controller 321 through the sampling control module 327, and the sampling control module 327 is electrically connected to the constant voltage and constant current module 325.

[0061] The receiving coil 322 wirelessly receives electrical energy from the wireless transmitting device 31 and generates AC power. The rectifier and filter module 324 rectifies the AC power into DC power and outputs a DC voltage to the constant voltage and constant current module 325. The fourth MCU controller 321 controls the power supply between the receiving coil 322 and the constant voltage and constant current module 325 through the signal feedback module 323. The constant voltage and constant current module 325 boosts / bucks the DC voltage output by the rectifier and filter module 324 into a constant voltage and outputs it to the electrode plate 33. The constant voltage and constant current module 325 is designed to ensure the efficiency of electrical energy utilization. When the salt concentration in the water is low, the voltage of the circuit system will increase under constant current, resulting in increased power and low efficiency in producing sodium hypochlorite. Therefore, the maximum output voltage must be limited. When the salt concentration is high, the conductivity of the water is high. If a constant voltage power supply is used, it will lead to an increase in current, affecting the life of the electrode plate. Therefore, the constant voltage and constant current module 325 is needed to limit the output voltage and current. The polarity reversal module 326 is electrically connected to the first level output terminal and the second level output terminal of the fourth MCU controller 321, and the two output terminals of the polarity reversal module 326 are electrically connected to the electrode plate 33. The fourth MCU controller 321 controls the first level output terminal and the second level output terminal to output high level or low level, and periodically switches the polarity of the output level of the first level output terminal and the second level output terminal, thereby driving the polarity reversal module 326 to periodically switch the polarity of the two output terminals to perform timed polarity reversal of the electrode plate 33.

[0062] Specifically, the first-level output terminal and the second-level output terminal each have two ports. Transistors Q4, Q3, Q6, and Q8 in the inverted electrode module 326 are respectively connected to the two ports of the first-level output terminal and the second-level output terminal. When the first-level output terminal and the second-level output terminal of the fourth MCU controller 321 output high level, low level, low level, and high level respectively, MOSFETs Q5 and Q8 are turned on, and MOSFETs Q6 and Q7 are turned off. At this time, the first output terminal connected to the electrode plate 33 is the negative terminal, and the second... The output terminal is the positive terminal; when the first level output terminal and the second level output terminal of the fourth MCU controller 321 output low level, high level, high level, and low level respectively, MOSFETs Q6 and Q7 are turned on, and MOSFETs Q5 and Q8 are turned off. At this time, the first output terminal of the terminal connected to the electrode plate 33 is the positive terminal and the second output terminal is the negative terminal. The four MCU controllers 321 use a timer to repeatedly switch the output high and low levels from the two ports of the first level output terminal and the second level output terminal according to the setting at predetermined intervals, thereby realizing the reversal of the electrode plate 33.

[0063] The sampling control module 327 is used to acquire the current of the inverted electrode module 326 and generate a dynamic voltage to the constant voltage and constant current module 325; the constant voltage and constant current module 325 changes the voltage output value of the constant voltage and constant current module 325 according to the dynamic voltage to keep the current received by the electrode plate 33 constant.

[0064] The sampling control module 327 detects the current at the current of the reversing module 326 and compares it with the set value. If the current is lower than the set value, no output is output. If the current is higher than the set value, the dynamic voltage control constant voltage and constant current module 325 is used to reduce the output voltage, thereby achieving the purpose of constant current.

[0065] refer to Figure 9 and Figure 10As shown, the wireless receiving device 32 also includes a detection module 328. In step S4, the specific process of detecting the wireless transmission signal is as follows: the detection module 328 receives the wireless transmission signal output by the receiving coil 322, and then rectifies the wireless transmission signal to filter out high-frequency signals to obtain the first control signal.

[0066] The detection module 328 includes diodes D1, D2, and D3, resistors R3, R4, R5, and R6, and capacitors C1 and C2. The anode of diode D1 is connected to the receiving coil 322, and the cathode is connected to capacitor C1. Resistor R3 is connected in parallel across capacitor C1. Resistors R4 and R5 are connected in series, with one end of resistor R4 connected to the first end of resistor R3 and the other end of resistor R5 connected to the second end of resistor R3. The anode of diode D2 is connected to the cathode of diode D3 and to resistor R6. The other end of resistor R6 is connected to the fourth MCU controller 321 and the first end of capacitor C2. The cathode of diode D2 is connected to the first end of resistor R5, and the anode of diode D3 is connected to the second end of resistor R5 and the second end of capacitor C2, and is grounded.

[0067] Diode D1 performs half-wave rectification on the wireless transmission signal induced by the receiving coil 322, converting it into a pulsating DC signal. Next, capacitor C1 filters out high-frequency components from the rectified pulsating DC signal while preserving the peak voltage, thus filtering out high-frequency signals in the wireless transmission signal. Subsequently, a voltage divider circuit composed of resistors R4 and R5 proportionally reduces the peak voltage to a safe range acceptable to the fourth MCU controller 321. Then, a clamping circuit composed of diodes D2 and D3 provides amplitude limiting protection for the output voltage. Finally, an RC low-pass filter composed of R6 and C2 further filters out any remaining high-frequency noise, resulting in the first control signal output to the fourth MCU controller 321.

[0068] refer to Figure 9 and Figure 11As shown, the output terminal of the constant voltage and constant current module 325 is also electrically connected to a voltage detection module 329; the voltage detection module 329 includes resistors R7 and R8 and capacitor C1. Resistors R7 and R8 are connected in series, and one end of R7 is connected to the output terminal of the constant voltage and constant current module 325, and the other end is connected to resistor R8 and the fourth MCU controller respectively; the other end of resistor R8 is grounded, and capacitor C3 is connected in parallel across resistor R8; the fourth MCU controller 321 obtains the working voltage of electrode 33 through the voltage detection module, thereby enabling the detection of the usage status of electrode 33 by detecting the voltage, ensuring that electrode 33 is in a safe working state.

[0069] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention and do not limit the invention to the specific implementations described. Obviously, other modifications and variations can be made based on the content of this specification. The embodiments selected and specifically described in this specification are intended to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. They are not intended to limit the invention, and any simple modifications to the invention fall within the scope of protection of this invention.

Claims

1. A signal transmission method for a water quality regulation system, characterized in that, The water quality conditioning system includes a control panel, a water quality detector electrically connected to the control panel, and a generator for electrolyzing sodium hypochlorite or chlorine gas. The generator includes a wireless transmitter, a wireless receiver corresponding to the wireless transmitter, and several electrode plates electrically connected to the wireless receiver. The signal transmission method includes: Step S1: Obtain water quality data through a water quality detector and transmit it wirelessly to the control panel; wherein, the detection data includes, but is not limited to, one or more of the water's ORP value, salinity value, or temperature value; Step S2: The control panel receives and analyzes the detection data of the water body, obtains the water quality status of the water body, generates a corresponding first control signal, and outputs it to the wireless transmitting device; Step S3: The wireless transmitting device generates a high-frequency signal of a predetermined frequency and integrates the received first control signal into the high-frequency signal to form a wireless transmission signal and transmit it to the wireless receiving device; wherein, the first control signal is used to control the electrolysis efficiency of the generator; Step S4: After receiving the wireless transmission signal, the wireless receiving device generates an electrical drive output to power the electrode plate; at the same time, it performs detection processing on the wireless transmission signal to obtain the first control signal, and outputs the control signal to control the magnitude of the current on the electrode plate, thereby controlling the electrolysis efficiency of the generator. Step S5: The wireless receiving device acquires the current operating status information of the generator, and generates a second control signal according to the operating status information, and then controls the power supply of the wireless receiving device to be quickly switched on and off according to the second control signal; Step S6: The control panel detects the change in output current caused by the power supply interruption of the wireless receiver, obtains the working status information carried by the second control signal, and triggers the corresponding status indicator device on the control panel according to the working status information.

2. The signal transmission method for a water quality regulation system according to claim 1, characterized in that, The water quality detector includes a first MCU controller, a salinity probe, an ORP probe, a temperature probe, and a wireless signal transmission module; and the output terminal of the ORP probe is connected to the first MCU controller through an impedance conversion circuit. Step S1 specifically involves the first MCU controller controlling the salinity probe, ORP probe, and temperature probe to power on in a time-sharing manner, and causing the impedance conversion circuit to output a high impedance state when the ORP probe is powered on and a low impedance state when the ORP probe is powered off. After the salinity probe, ORP probe, and temperature probe respectively acquire the salinity, ORP value, and temperature value of the water body, the values ​​are output to the first MCU controller and transmitted to the control panel via the wireless signal transmission module.

3. The signal transmission method for a water quality regulation system according to claim 2, characterized in that, The impedance conversion circuit includes a first operational amplifier. The output terminal and the inverting input terminal of the first operational amplifier are respectively connected to the first detection input terminal of the first MCU controller, and the non-inverting input terminal is connected to the output terminal of the ORP probe and grounded. The positive terminal of the first operational amplifier is connected to an external power supply, and the negative terminal is grounded. The first MCU controller controls the power supply of the ORP probe to make the output terminal of the first operational amplifier present a high impedance state or a low impedance state.

4. The signal transmission method for a water quality regulation system according to claim 1, characterized in that, The control panel includes a second MCU controller, a wireless signal receiving module and a switching device, which are electrically connected to the second MCU controller respectively; the switching device is used to control the on / off state of the output from the control panel to the wireless transmitting device; Step S2 specifically involves: after receiving the detection data of the water body through the wireless signal receiving module, the second MCU controller analyzes and obtains the water quality status of the water body and generates a corresponding first control signal, outputting control over the on / off state of the switching devices, thereby controlling the on / off state of the control panel outputting to the wireless transmitting device; the wireless transmitting device reconstructs and obtains the first control signal based on the on / off timing of the output; wherein, the first control signal includes the switching signals of several switching devices, and the timing arrangement of the switching signals matches the electrolysis efficiency of the generator corresponding to the water quality status.

5. The signal transmission method for a water quality regulation system according to claim 4, characterized in that, The wireless transmitting device includes a third MCU controller and a high-frequency signal generation module and a power amplification module, which are electrically connected to the third MCU controller respectively. The power amplification module is electrically connected to a transmitting coil. Specifically, step S3 involves: the third MCU controller detecting voltage changes caused by the on / off switching of the control panel output and acquiring the first control signal; the high-frequency signal generation module generating a high-frequency signal of a predetermined frequency; the third MCU controller integrating the first control signal into the high-frequency signal to form a wireless transmission signal, which is then amplified by the power amplifier module and transmitted to the wireless receiver via the transmitting coil.

6. The signal transmission method for a water quality regulation system according to claim 4, characterized in that, The control panel also includes a current signal conversion module; the current signal conversion module includes a sampling resistor and a comparator, the first end of the sampling resistor is connected to the switching device and the non-inverting input of the comparator respectively, the second end is grounded, and the non-inverting input of the comparator is grounded, the inverting input of the comparator is grounded through a resistor R1 and connected to an external power supply through a resistor R2; the output of the comparator is connected to the second MCU controller; Step S6 specifically involves: the switching device remaining on; the power supply switching of the wireless receiving device causing a change in the current flowing through the sampling resistor and generating a changing voltage; the comparator acquiring the changing voltage and comparing it with a preset voltage threshold, outputting a high-level or low-level signal to the second MCU controller; the second MCU controller acquiring the operating status information carried by the second control signal according to the timing of the received high-level or low-level signal changes, and triggering the corresponding status indicator device on the control panel according to the operating status information.

7. The signal transmission method for a water quality regulation system according to claim 1, characterized in that, The wireless receiving device includes a fourth MCU controller and a receiving coil and a signal feedback module electrically connected to the fourth MCU controller. The signal feedback module includes a P-MOS transistor and a transistor. The source of the P-MOS transistor is connected to the first terminal of the receiving coil, the gate is connected to the collector of the transistor, and the drain is electrically connected to the electrode plate. The base of the transistor is electrically connected to the fourth MCU controller, and the transmitter is grounded. In step S5, the second control signal consists of several high-level signals and low-level signals arranged in a specific timing sequence; the fourth MCU controller generates the second control signal and outputs high-level signals or low-level signals in sequence, thereby controlling the P-MOS transistor to turn on or off through the transistor, and controlling the power supply of the electrode plate.

8. The signal transmission method for a water quality regulation system according to claim 7, characterized in that, The wireless receiving device also includes a rectifier and filter module, a constant voltage and constant current module, a polarity reversal module, and a sampling control module. The rectifier and filter module is electrically connected to the receiving coil, and is also electrically connected to the constant voltage and constant current module through the signal feedback module; the constant voltage and constant current module is electrically connected to the electrode plate through the reversing module; the reversing module is electrically connected to the fourth MCU controller through the sampling control module, and the sampling control module is also electrically connected to the constant voltage and constant current module. The receiving coil wirelessly receives electrical energy from the wireless transmitting device and generates AC power. The rectifier and filter module rectifies the AC power into DC power and outputs a DC voltage to the constant voltage and constant current module. The fourth MCU controller controls the power supply connection and disconnection between the receiving coil and the constant voltage and constant current module through the signal feedback module; The constant voltage and constant current module boosts / boosts the DC voltage output by the rectifier and filter module into a constant voltage and outputs it to the electrode plate; The polarity reversal module is electrically connected to the first level output terminal and the second level output terminal of the fourth MCU controller, and the two output terminals of the polarity reversal module are electrically connected to the electrode plate. The fourth MCU controller controls the first level output terminal and the second level output terminal to output a high level or a low level, and periodically switches the polarity of the output level of the first level output terminal and the second level output terminal, thereby driving the polarity reversal module to periodically switch the polarity of the two output terminals to perform periodic polarity reversal of the electrode plate. The sampling control module is used to acquire the current of the inverted electrode module and generate a dynamic voltage to the constant voltage and constant current module; the constant voltage and constant current module changes the voltage output value of the constant voltage and constant current module according to the dynamic voltage to keep the current received by the electrode plate constant.

9. The signal transmission method for a water quality regulation system according to claim 7, characterized in that, The wireless receiving device further includes a detection module. In step S4, the specific process of detecting the wireless transmission signal is as follows: the detection module receives the wireless transmission signal output by the receiving coil, and then rectifies the wireless transmission signal to filter out high-frequency signals to obtain the first control signal; wherein, the detection module includes diodes D1, D2, and D3, resistors R3, R4, R5, and R6, capacitors C1 and C2; The anode of diode D1 is connected to the receiving coil, and the cathode is connected to capacitor C1; resistor R3 is connected in parallel across capacitor C1; resistors R4 and R5 are connected in series, with the other end of resistor R4 connected to the first end of resistor R3, and the other end of resistor R5 connected to the second end of resistor R3; the anode of diode D2 is connected to the cathode of diode D3, and is also connected to resistor R6; the other end of resistor R6 is connected to the fourth MCU controller and the first end of capacitor C2; the cathode of diode D2 is connected to the first end of resistor R5, and the anode of diode D3 is connected to the second end of resistor R5 and the second end of capacitor C2, and is grounded.

10. The signal transmission method for a water quality regulation system according to claim 8, characterized in that, The output terminal of the constant voltage and constant current module is also electrically connected to a voltage detection module; the voltage detection module includes resistors R7 and R8 and capacitor C2. Resistors R7 and R8 are connected in series, and one end of R7 is connected to the output terminal of the constant voltage and constant current module, and the other end is connected to resistor R8 and the fourth MCU controller respectively; the other end of resistor R8 is grounded, and capacitor C3 is connected in parallel across resistor R8; the fourth MCU controller obtains the working voltage of the electrode plate through the voltage detection module.

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