A high-stability and strong-interference-resistant water pump controller

Abstract

The application discloses a high-stability and strong-interference-resistant water pump controller, and belongs to the field of water pump controllers, which comprises a water pump control unit, a pulse generator, a liquid level detection module, a voltage and current detection module and a data security module, the input end of the water pump control unit is in communication connection with the pulse generator, the output end of the pulse generator is connected with the input end of the liquid level detection module, the output end of the liquid level detection module is in communication connection with the water pump control unit, the pulse generator is used for generating an alternating square wave pulse signal with a specific frequency of 5Hz, the liquid level detection module is provided with a probe and a probe receiving circuit, the output end of the voltage and current detection module is in communication connection with the water pump control unit, the data security module is in communication connection with the water pump control unit, and the water pump control unit is internally provided with a data storage chip and a single-chip microcomputer. The application has the advantages of lower cost, prevention of scale generation of the probe, influence on sensitivity, stronger anti-interference capability, improvement of the stability of the product and guarantee of the safety of operation data.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water pump controller, in particular to a high stability and strong interference resistance water pump controller. BACKGROUND

[0002] The water pump controller is started and stopped according to the detected water source state, pipe water consumption and pipe pressure change and other data. The traditional water pump controller uses electrodes to detect the liquid level, input voltage and water pump working current, and then drives the water pump to work through a relay.

[0003] The existing water pump controller lacks relevant isolation technology, filtering and high-precision sampling. The sampling of the input voltage of the existing water pump controller uses the power transformer signal as the voltage measurement and display. Because the transformer process is simple, the voltage signal is easily affected by the change of the power load and fluctuates. Therefore, the displayed voltage is not accurate and is easily disturbed. In order to control the cost, the traditional sampling method uses a current transformer for isolation, and then rectifies through a diode. Since the diode has a voltage drop, the current accuracy is not accurate and is easily disturbed. The traditional water pump liquid level detection device adopts a direct current conductivity detection technology, which judges the liquid level height through the change of the direct current between the electrodes. For example, the electrode type water level meter judges the water level by the conduction phenomenon when the electrode contacts the liquid. This method is simple and convenient to test and low in price, but the fluctuating water surface may cause difficulty in judgment. SUMMARY

[0004] In view of the above problems existing in the prior art, the purpose of the present application is to provide a high stability and strong interference resistance water pump controller to solve the problems of low detection accuracy and poor anti-interference ability of the water pump controller.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A high stability and strong interference resistance water pump controller, comprising a water pump control unit, a pulse generator, a liquid level detection module, a voltage and current detection module and a data security module, the input end of the water pump control unit and the pulse generator are communicatively connected, the output end of the pulse generator is connected with the input end of the liquid level detection module; the output end of the liquid level detection module is communicatively connected with the water pump control unit; the pulse generator is used for generating an alternating square wave pulse signal with a specific frequency of 5Hz; the liquid level detection module is provided with a probe and a probe receiving circuit, the output end of the voltage and current detection module is communicatively connected with the water pump control unit; the data security module is communicatively connected with the water pump control unit, and the water pump control unit is internally provided with a data storage chip and a single-chip microcomputer.

[0007] As a further scheme of the present application, the input end of the water pump control unit is communicatively connected with a key input module.

[0008] As a further scheme of the present application: the output end of the water pump control unit is in communication connection with the display module.

[0009] As a further scheme of the present application: the water pump control unit is in communication connection with the water pump.

[0010] As a further scheme of the present application: the pulse generator comprises a triode T3, a triode T5, a triode T6, a resistor R62, a resistor R63, a resistor R53, a resistor R69, a resistor R74, a resistor R66, a resistor R75, a resistor R44, a diode D22, a blue light diode D23, and a capacitor C27.

[0011] One end of the resistor R62 is connected with the PWM signal output end of the single-chip microcomputer in the water pump control unit, and the other end of the resistor R62 is connected with the base of the triode T3, the emitter of the triode T3 is grounded, and the collector of the triode T3 is connected with one end of the resistor R63, one end of the resistor R53 and one end of the resistor R69.

[0012] The other end of one end of the resistor R63 is connected with the anode of the diode D22, and the other end of the resistor R53 is connected with the anode of the blue light diode D23; the other end of the resistor R69 is connected with a +15V power supply.

[0013] The cathode of the blue light diode D23 is connected with one end of the resistor R66 and the base of the triode T5, and the other end of the resistor R66 is grounded.

[0014] The cathode of the diode D22 is connected with one end of the resistor R74 and the base of the triode T6, and the other end of the resistor R74 is connected with a +15V power supply; the emitter of the triode T6 is connected with the +15V power supply.

[0015] The collector of the triode T6 is connected with the anode of the capacitor C27 and one end of the resistor R75, and the other end of the resistor R75 is connected with the collector of the triode T5.

[0016] The cathode of the capacitor C27 is connected with one end of the resistor R44, and the other end of the resistor R44 is connected with the probe in the liquid level detection module.

[0017] As a further scheme of the present application: the triode T3 is an NPN type triode, the triode T6 is a PNP type triode, and the triode T5 is an NPN type triode.

[0018] As a further scheme of the present application: the probe receiving circuit on the liquid level detection module comprises a resistor R23, a resistor R24, a resistor R25, a diode D4, a diode D5, a diode D9 and a capacitor C19.

[0019] One end of resistance R23 in the probe receiving circuit is connected with the probe on the liquid level detection module, and the other end of resistance R23 is connected with the anode of diode D4 and the cathode of diode D5 simultaneously; the anode of diode D5 is grounded;

[0020] The cathode of diode D4 is connected with one end of resistance R24 and one end of resistance R25 simultaneously, and the other end of resistance R24 is grounded; the other end of resistance R25 is connected with the cathode of diode D9, and the anode of diode D9 is grounded;

[0021] Capacitor C19 is arranged in parallel across resistance R24;

[0022] The cathode of diode D9 is connected with the water pump control unit.

[0023] As a further scheme of the application, the voltage and current detection module comprises a mutual inductor circuit and an amplification and filtering circuit; the mutual inductor circuit is provided with a voltage and current mutual inductor.

[0024] As a further scheme of the application, the data storage chip in the water pump control unit is connected with the single-chip microcomputer in the water pump control unit through IIC communication.

[0025] As a further scheme of the application, the probe is made of corrosion-resistant stainless steel, and the probe is installed in the measured liquid.

[0026] Compared with the prior art, the application has the following beneficial effects:

[0027] The application solves the problems of scale deposition and insufficient precision of traditional direct current detection technology, improves the safety of data, and has simple circuit and lower cost by inhibiting electrode electrolysis reaction, eliminating polarization effect and enhancing anti-interference capability. The application prevents the probe from generating scale and affecting sensitivity, and has stronger anti-interference capability. The application increases signal precision and improves product stability. The application uses a storage chip to store data, and a customized communication protocol ensures the safety of operation data of the water pump controller. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A system framework diagram of the water pump controller with high stability and strong anti-interference capability is disclosed.

[0029] Figure 2 A circuit principle diagram of the pulse generator in the water pump controller with high stability and strong anti-interference capability is disclosed.

[0030] Figure 3 A circuit principle diagram of the probe receiving circuit in the water pump controller with high stability and strong anti-interference capability is disclosed.

[0031] Figure 4The embodiment discloses an alternating current pulse waveform schematic diagram of a high-stability and strong-interference-resistant water pump controller.

[0032] Figure 5 The embodiment discloses an interactor circuit principle diagram in a voltage and current detection module circuit of the high-stability and strong-interference-resistant water pump controller.

[0033] Figure 6 The embodiment discloses an amplification and filtering circuit principle diagram in the voltage and current detection module circuit of the high-stability and strong-interference-resistant water pump controller. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connected", "connected" should be understood in a broad sense; for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Please refer to Figures 1-6 A high-stability and strong-interference-resistant water pump controller, comprising a water pump control unit, a pulse generator, a liquid level detection module, a voltage and current detection module and a data security module, the input end of the water pump control unit and the pulse generator are in communication connection, the output end of the pulse generator is connected with the input end of the liquid level detection module; the output end of the liquid level detection module is in communication connection with the water pump control unit; the pulse generator is used for generating an alternating square wave pulse signal with a specific frequency of 5Hz; the liquid level detection module is provided with a probe and a probe receiving circuit, the probe is supported by corrosion-resistant stainless steel, and is installed in the measured liquid. The output end of the voltage and current detection module is in communication connection with the water pump control unit; the voltage and current detection module generates a low-voltage alternating current signal through an interactor. The data security module is in communication connection with the water pump control unit, and the water pump control unit is internally provided with a data storage chip and a single-chip microcomputer; the data security module communicates with the data storage chip in the water pump control unit through a communication protocol, and exchanges machine operation data.

[0037] The input end of the water pump control unit is communicatively connected to the key input module, and the key input module facilitates the control and adjustment of the working state of the water pump control unit;

[0038] The output end of the water pump control unit is communicatively connected to the display module, and the display module is used to display the working status of the water pump, which is beneficial to the operation of the water pump control unit.

[0039] The water pump control unit is connected to the water pump for communication. The water pump control unit is used to control the operation of the water pump, determine the liquid level status according to the signal characteristics, and control the start and stop of the water pump.

[0040] Further, if Figure 2 As shown, the pulse generator includes transistor T3, transistor T5, transistor T6, resistor R62, resistor R63, resistor R53, resistor R69, resistor R74, resistor R66, resistor R75, resistor R44, diode D22, blue light diode D23, and capacitor C27;

[0041] One end of the resistor R62 is connected to the PWM signal output end of the water pump control unit, the other end of the resistor R62 is connected to the base of the transistor T3, the emitter of the transistor T3 is grounded, and the collector of the transistor T3 is connected to one end of the resistor R63, one end of the resistor R53, and one end of the resistor R69 at the same time;

[0042] The other end of one end of the resistor R63 is connected to the anode of the diode D22; the other end of the resistor R53 is connected to the anode of the blue light diode D23; the other end of the resistor R69 is connected to the +15V power supply;

[0043] The cathode of the blue light emitting diode D23 is connected to one end of the resistor R66 and the base of the transistor T5; the other end of the resistor R66 and the emitter of the transistor T5 are both grounded;

[0044] The cathode of diode D22 is connected to one end of resistor R74 and the base of transistor T6 at the same time; the other end of resistor R74 is connected to the +15V power supply; the emitter of transistor T6 is connected to the +15V power supply;

[0045] The collector of transistor T6 is connected to the positive electrode of capacitor C27 and one end of resistor R75 at the same time, and the other end of resistor R75 is connected to the collector of transistor T5;

[0046] The negative electrode of capacitor C27 is connected to one end of resistor R44, and the other end of resistor R44 is connected to the probe in the liquid level detection module;

[0047] Transistor T3, transistor T5 and transistor T6 form a composite transistor switching circuit.

[0048] The control circuit is a PWM signal output end of the water pump control unit, the first switch circuit comprises a resistor R62 and a transistor T3, the second switch circuit comprises a resistor R74 and a transistor T6, and the third switch circuit comprises a resistor R53 and a transistor T5.

[0049] In the embodiment, the high level of the PWM signal output end should not be higher than +15V of the direct current power supply, and the person skilled in the art can set it according to the actual situation.

[0050] In the application, the high-low level pulse signals output by the signal generation circuit through the PWM output end control the conduction and cutoff of the transistors T3, T6 and T5. Since the transistor T3 is an NPN transistor, the transistor T6 is a PNP transistor, and the transistor T5 is an NPN transistor, when the pulse signal output by the PWM output end of the water pump control unit is high, according to the saturation conduction and cutoff characteristics of the transistor, the transistor T3 is turned on, the transistor T6 is turned on, and the transistor T5 is turned off, at this time, the direct current power supply +15V charges the capacitor C27 through the resistor R44, and the voltage across the capacitor C27 rises; when the pulse signal output by the PWM output end of the water pump control unit is low, according to the saturation conduction and cutoff characteristics of the transistor, the transistor T3 is turned off, the transistor T6 is turned off, and the transistor T5 is turned on, at this time, the capacitor C27, the resistor R75 and the ground form a closed loop, the capacitor C27 is discharged, and the voltage across the capacitor C27 continuously decreases, and it can be measured that the voltage of the capacitor C27 shows a downward trend. The water pump control unit reasonably controls the frequency of the high-low level pulse signal generated by the PWM output end, and when the capacitor C27 is charged and discharged, the capacitor C27 will form a certain frequency of pulsed direct current voltage signal across the capacitor C27.

[0051] In the embodiment, the high level of the PWM signal output end should not be higher than +15V of the direct current power supply, and the person skilled in the art can set it according to the actual situation. Figure 4

[0052] ​In addition, the circuit uses the light emitting diode D23 to enable intuitive observation of the pulse circuit working state. In this way, the saturation conduction and cut-off of the transistor is used to realize charging and discharging of the capacitor C27 by only the direct current power supply +15V, to generate a certain frequency of pulsating direct current voltage signal, greatly simplifying the structure of the power supply part of the liquid level detection circuit, without the need for additional separate design of positive and negative voltage output in the circuit, reducing the use requirements for the power supply, and simplifying the composition of the liquid level detection circuit. Thus, the problem of multiple power supply devices and multiple transformer windings caused by the need for positive and negative voltage to generate high-frequency alternating current signals in the prior art is solved. At the same time, since the PWM signal output by the water pump control unit is not affected by temperature, it can stably and accurately control the conduction and shutdown of the circuit, thereby solving the problem of inaccurate water level detection caused by the voltage amplitude change of the operational amplifier affected by temperature when using alternating current signals as an excitation source in the prior art.

[0053] Further, as shown in Figure 3 The probe receiving circuit on the liquid level detection module includes resistors R23, R24, R25, diodes D4, D5, D9, and capacitor C19.

[0054] One end of the resistor R23 in the probe receiving circuit is connected to the probe on the liquid level detection module, and the other end of the resistor R23 is connected to the anode of the diode D4 and the cathode of the diode D5; the anode of the diode D5 is grounded.

[0055] The cathode of the diode D4 is connected to one end of the resistor R24 and one end of the resistor R25, and the other end of the resistor R24 is grounded; the other end of the resistor R25 is connected to the cathode of the diode D9, and the anode of the diode D9 is grounded.

[0056] The capacitor C19 is connected in parallel across the resistor R24.

[0057] The cathode of the diode D9 is connected to the water pump control unit.

[0058] The positive alternating pulse signal passes through the liquid to the probe, and then passes through the resistor R23, the diode D4, and the resistor R24 to the ground. The negative pulse signal flows back from the ground, the diode D5, and the resistor R23. The zener diode D9 and the resistor R25 are used to absorb interference voltage signals to protect the chip pins from being damaged.

[0059] Further, as shown in Figures 5-6As shown, the voltage and current detection module includes a mutual inductor circuit and an amplification filter circuit; the mutual inductor circuit is provided with a voltage and current transformer, and a low-voltage alternating current signal is generated through the mutual inductor. The wire passing through the current transformer is used as a single winding of the transformer and also as a primary coil. The main body of the transformer has dozens to hundreds of windings, forming a secondary coil. Unlike the voltage transformer, the current transformer has an inverse ratio. This means that a current transformer with a ratio of 1000:1 will generate a 0.001A current in the secondary coil for every 1A current in the primary coil.

[0060] Using Ohm's law (V=IR), the current output by the transformer can be converted into a usable voltage. The present application uses a ZMCT103 current transformer. For this sensor, a 100-ohm load resistor will generate a 1V RMS voltage on the wire passing through the current transformer.

[0061] As shown in Figure 5 , the resistance R5 is a 100R load resistor, the resistance R4 is a 1K load resistor, and a 0R resistor is welded through the resistance R15 and the resistance R16 to select whether the resistance R4 or the resistance R5 is used as the load resistor. The resistance R11 and the resistance R6 are 57.6K, which are the reverse input resistors of the operational amplifier 358. Through Figure 6 , the resistance R55 is 100K, and the amplification factor A=1+R55 / R6=2.7 can be calculated. After the signal is amplified, it is integrated and filtered through R45 C32 and R57 C34, and finally the single-chip microcomputer samples through RA1.

[0062] Further, the data storage chip inside the water pump control unit is used to store important operation data to enhance the security of the data. The communication mode between the single-chip microcomputer and the data storage chip in the water pump control unit adopts IIC communication. According to the I2C bus protocol, the data signal transmission on the bus starts with a start signal S and ends with a stop signal P. Both the start signal and the stop signal are sent by the host. After the start signal is generated, the bus is in an occupied state; after the stop signal is generated, the bus is in an idle state.

[0063] The I2C bus must have an acknowledge signal A after transmitting each 1 byte of data. The acknowledge signal appears on the 9th clock bit, and the clock signal corresponding to the acknowledge signal is generated by the master device. At this time, the sender must make the SDA line high on this clock bit so that the receiver sends a low-level acknowledge signal A on this bit.

[0064] If the receiver does not respond to the master device addressing signal for some reason, for example, the receiver is processing other data and cannot receive the data on the bus, the bus must be released, the data line is set to high, and a stop signal is generated by the master device to end the data transmission on the bus.

[0065] When the master device receives data from the slave device, after receiving the last data byte, a non-acknowledge signal must be sent to the slave device (NACK) ), so that the master device sends a termination signal, thereby ending the data transmission.

[0066] As an important water level detection sensor, the water level electrode has been widely used in industrial automation, water supply system, sewage treatment, boiler control and many other fields. Through accurate measurement and control of the liquid level, the water level electrode can effectively ensure the safe operation of the system and improve the work efficiency.

[0067] The water pump controller for liquid level detection through the mutual inductor, operational amplifier, integral circuit and alternating current pulse signal is provided, and the detection precision and anti-interference ability are improved. Based on the liquid level detection of the alternating current pulse signal, the electrode electrolysis reaction is inhibited, the polarization effect is eliminated, and the anti-interference ability is enhanced, so that the problems of scale deposition and insufficient precision of the traditional direct current detection technology are solved. The safety of data is improved through communication of the storage chip.

[0068] The water pump controller for liquid level detection through the mutual inductor, operational amplifier, integral circuit and alternating current pulse signal is provided, and the detection precision and anti-interference ability are improved. Based on the liquid level detection of the alternating current pulse signal, the electrode electrolysis reaction is inhibited, the polarization effect is eliminated, and the anti-interference ability is enhanced, so that the problems of scale deposition and insufficient precision of the traditional direct current detection technology are solved. The safety of data is improved through communication of the storage chip.

[0069] The electrode is driven by high-frequency alternating square waves, the continuous electrolysis reaction on the surface of the electrode is eliminated by periodically reversing the current direction, and the generation of scale is greatly reduced. The ion migration caused by electrolysis is inhibited by polarity alternation, and the deposition of metal ions on the surface of the electrode is avoided. The long-term accumulation of electric charge at the electrode interface is avoided by alternating current signals, and the hindering of the polarization layer to the current is eliminated. The fundamental component of the pulse signal is extracted by a narrow-band filter circuit, and environmental interference is effectively filtered out.

[0070] The pulse signal generating circuit in the application is composed of an oscillator and a power amplifier circuit, and the output amplitude of the square wave can be adjusted to 5-24V. Non-target frequency noise is filtered out. The same frequency and phase component is extracted by using a reference signal to improve the signal-to-noise ratio. The analog signal can be converted into digital quantity for controller processing. According to the dynamic adjustment of the detection threshold value of the liquid conductivity, different water quality environments are adapted.

[0071] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The presently disclosed embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein and are part of the invention. Any reference signs in the claims should not be construed as limiting the scope of the claims.

[0072] Furthermore, it should be understood that although the description above refers to particular embodiments, the description can include more than one independent technical solution, and the description is presented herein in a way that is merely illustrative and not restrictive, and those skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A water pump controller with high stability and strong interference resistance, characterized in that: It includes a water pump control unit, a pulse generator, a liquid level detection module, a voltage and current detection module, and a data security module. The water pump control unit is communicatively connected to the input end of the pulse generator, and the output end of the pulse generator is connected to the input end of the liquid level detection module; the output end of the liquid level detection module is communicatively connected to the water pump control unit; the pulse generator is used to generate an AC square wave pulse signal with a specific frequency of 5Hz; the liquid level detection module is provided with a probe and a probe receiving circuit, the output end of the voltage and current detection module is communicatively connected to the water pump control unit; the data security module is communicatively connected to the water pump control unit, and a data storage chip is provided inside the water pump control unit; The pulse generator includes transistor T3, transistor T5, transistor T6, resistor R62, resistor R63, resistor R53, resistor R69, resistor R74, resistor R66, resistor R75, resistor R44, diode D22, blue light diode D23, and capacitor C27; One end of the resistor R62 is connected to the PWM signal output end of the single chip microcomputer in the water pump control unit, the other end of the resistor R62 is connected to the base of the transistor T3, the emitter of the transistor T3 is grounded, and the collector of the transistor T3 is connected to one end of the resistor R63, one end of the resistor R53, and one end of the resistor R69 at the same time; The other end of one end of the resistor R63 is connected to the anode of the diode D22; the other end of the resistor R53 is connected to the anode of the blue light diode D23; the other end of the resistor R69 is connected to the +15V power supply; The cathode of the blue light emitting diode D23 is connected to one end of the resistor R66 and the base of the transistor T5; the other end of the resistor R66 and the emitter of the transistor T5 are both grounded; The cathode of diode D22 is connected to one end of resistor R74 and the base of transistor T6 at the same time; the other end of resistor R74 is connected to the +15V power supply; the emitter of transistor T6 is connected to the +15V power supply; The collector of transistor T6 is connected to the positive electrode of capacitor C27 and one end of resistor R75 at the same time, and the other end of resistor R75 is connected to the collector of transistor T5; The negative electrode of capacitor C27 is connected to one end of resistor R44, and the other end of resistor R44 is connected to the probe in the liquid level detection module; The probe receiving circuit on the liquid level detection module includes a resistor R23, a resistor R24, a resistor R25, a diode D4, a diode D5, a diode D9 and a capacitor C19; One end of the resistor R23 in the probe receiving circuit is connected to the probe on the liquid level detection module, and the other end of the resistor R23 is connected to the anode of the diode D4 and the cathode of the diode D5; the anode of the diode D5 is grounded; The cathode of the diode D4 is connected to one end of the resistor R24 ​​and one end of the resistor R25, and the other end of the resistor R24 ​​is grounded; the other end of the resistor R25 is connected to the cathode of the diode D9, and the anode of the diode D9 is grounded; A capacitor C19 is connected in parallel across the resistor R24; The cathode of diode D9 is connected to the water pump control unit.

2. A water pump controller with high stability and strong interference resistance according to claim 1, characterized in that: The input end of the water pump control unit is communicatively connected to the key input module.

3. A water pump controller with high stability and strong interference resistance according to claim 2, characterized in that: The output end of the water pump control unit is communicatively connected to the display module.

4. A water pump controller with high stability and strong interference resistance according to claim 3, characterized in that: The water pump control unit is communicatively connected to the water pump.

5. A water pump controller with high stability and strong interference resistance according to claim 4, characterized in that: The transistor T3 is an NPN transistor, the transistor T6 is a PNP transistor, and the transistor T5 is an NPN transistor.

6. A water pump controller with high stability and strong interference resistance according to claim 5, characterized in that: The voltage and current detection module includes a mutual inductor circuit and an amplifying and filtering circuit; a voltage and current mutual inductor is provided in the mutual inductor circuit.

7. A water pump controller with high stability and strong interference resistance according to claim 6, characterized in that: The data storage chip in the water pump control unit is connected to the single chip microcomputer in the water pump control unit using IIC communication.

8. A water pump controller with high stability and strong interference resistance according to claim 7, characterized in that: The probe is made of corrosion-resistant stainless steel and is installed in the liquid to be measured.

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