Measurement system for ion concentration in water, water purification system and measurement method

Abstract

The invention relates to a water quality detection technology, and discloses a water ion concentration measurement system, a water purification system and a measurement method, and the water ion concentration measurement system comprises a polarization circuit, an open-circuit potential measurement circuit, a current amplification circuit, a microcontroller circuit, a temperature measurement circuit and a data storage circuit; the polarization circuit polarizes the working electrode; the open-circuit potential measuring circuit measures a corresponding open-circuit potential and transmits measurement data to the current amplifying circuit; the current amplification circuit is used for performing current amplification and filtering processing on the measurement data; the temperature measuring circuit is used for collecting temperature data and transmitting the temperature data to the microcontroller circuit; the microcontroller circuit is used for generating a polarization signal corresponding to the polarization circuit, calculating the ion concentration of the water sample according to the measurement data and the temperature data, and calibrating the system according to a standard solution with known concentration; and the data storage circuit is used for storing related data transmitted by the microcontroller circuit. The invention aims to realize accurate measurement of the ion concentration in water.

Description

Technical Field

[0001] The present application relates to the technical field of water quality detection, and in particular to a system for measuring ion concentration in water, a water purification system, and a method for measuring ion concentration in water. Background Art

[0002] The type and concentration of ions in water are key indicators for evaluating water quality, among which the concentration of calcium, magnesium and other ions has a particularly significant impact. The concentration of these ions directly determines the hardness of water, which in turn affects the taste and health safety of drinking water. In drinking water equipment, real-time monitoring of ion concentration in water quality helps to improve the automation level of the equipment and ensure the quality of drinking water.

[0003] However, existing ion concentration detection methods mainly rely on laboratory chemical analysis, which is complex, costly, and time-consuming, making it difficult to meet the needs of real-time monitoring in actual use scenarios. That is, how to achieve high-precision real-time monitoring in a complex water quality environment, especially for the accurate detection of trace ions such as calcium and magnesium, still has certain technical difficulties.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a system for measuring ion concentration in water, a water purification system and a method for measuring ion concentration in water, aiming to achieve accurate measurement of ion concentration in water.

[0006] To achieve the above-mentioned object, the present application provides a system for measuring ion concentration in water, comprising: a polarization circuit, an open circuit potential measurement circuit, a current amplification circuit, a microcontroller circuit, a temperature measurement circuit and a data storage circuit; The polarization circuit is electrically connected to the working electrode in the open circuit potential measurement circuit and polarizes the working electrode; The open circuit potential measurement circuit is electrically connected to the microcontroller circuit via the current amplification circuit; the reference electrode and the working electrode of the open circuit potential measurement circuit are placed in the water sample of the water purification device, the corresponding open circuit potential is measured, and the measurement data is transmitted to the current amplification circuit; A current amplifier circuit is used to perform current amplification and filtering on the measurement data and transmit the result to the microcontroller circuit; The temperature measurement circuit is electrically connected to the microcontroller circuit, and is used to collect temperature data of the water sample and transmit it to the microcontroller circuit; A microcontroller circuit is used to generate a polarization signal corresponding to the polarization circuit, calculate the ion concentration of the water sample according to the measurement data and the temperature data, and calibrate the system according to a standard solution of known concentration; The data storage circuit is electrically connected to the microcontroller circuit and is used for storing relevant data transmitted by the microcontroller circuit.

[0007] To achieve the above objectives, the present application also provides a water purification system, which includes a water purification device and a system for measuring the ion concentration in water as described above.

[0008] To achieve the above object, the present application also provides a method for measuring ion concentration in water, which is applied to the above-mentioned system for measuring ion concentration in water; the method for measuring ion concentration in water comprises: The microcontroller circuit controls the polarization circuit to generate a corresponding square wave signal according to the set frequency and amplitude, so as to polarize the working electrode in the open circuit potential measurement circuit; The water sample of the water purification equipment is measured based on the open circuit potential measurement circuit, and the current amplification circuit is used to amplify and filter the measurement data; Perform analog-to-digital conversion on the measured data after current amplification and filtering to generate sampling data; Based on the correspondence between the pre-stored sampling data and the ion concentration, the ion concentration is preliminarily calculated using the sampling data; Based on the temperature data of the water sample collected by the temperature measurement circuit, the initially calculated ion concentration is calibrated to obtain the ion concentration of the water sample.

[0009] The measurement system, water purification system and method for measuring ion concentration in water provided by the present application integrate polarization circuit, open circuit potential measurement circuit, current amplification circuit, microcontroller circuit, temperature measurement circuit and data storage circuit. Through the coordinated work of these components, accurate measurement of ion concentration in water can be achieved. The system can realize real-time monitoring of ion concentration in water, that is, through electrochemical technology and precision circuit design, it ensures real-time and high-precision measurement of ion concentration in water (especially calcium and magnesium ions) to meet the needs of actual use scenarios. In addition, the system supports automatic calibration function and data management to ensure long-term stable operation, as well as facilitate long-term water quality analysis and system optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the system architecture for measuring ion concentration in water in one embodiment of the present application; Figure 2 A circuit diagram of a polarization circuit in one embodiment of the present application; Figure 3 A circuit diagram of a microcontroller and temperature measurement in one embodiment of the present application; Figure 4 A circuit diagram of open circuit potential measurement and current amplification in one embodiment of the present application; Figure 5A circuit diagram of a data storage circuit in an embodiment of the present application; Figure 6 This is a schematic diagram of the system architecture for measuring ion concentration in water in another embodiment of the present application; Figure 7 Schematic diagram of the steps of a method for measuring ion concentration in water in one embodiment of the present application.

[0011] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0012] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0013] In addition, if the descriptions of "first", "second", etc. are involved in this application, they are only used for descriptive purposes (such as for distinguishing the same or similar features), and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0014] In one embodiment, a system for measuring ion concentration in water is provided, referring to Figure 1 , the measuring system of ion concentration in water includes: a polarization circuit, an open circuit potential measuring circuit, a current amplifying circuit, a microcontroller circuit, a temperature measuring circuit and a data storage circuit; The polarization circuit is electrically connected to the working electrode in the open circuit potential measurement circuit and polarizes the working electrode; The open circuit potential measurement circuit is electrically connected to the microcontroller circuit via the current amplification circuit; the reference electrode and the working electrode of the open circuit potential measurement circuit are placed in the water sample of the water purification device, the corresponding open circuit potential is measured, and the measurement data is transmitted to the current amplification circuit; A current amplifier circuit is used to perform current amplification and filtering on the measurement data and transmit the result to the microcontroller circuit; The temperature measurement circuit is electrically connected to the microcontroller circuit, and is used to collect temperature data of the water sample and transmit it to the microcontroller circuit; A microcontroller circuit is used to generate a polarization signal corresponding to the polarization circuit, calculate the ion concentration of the water sample according to the measurement data and the temperature data, and calibrate the system according to a standard solution of known concentration; The data storage circuit is electrically connected to the microcontroller circuit and is used for storing relevant data transmitted by the microcontroller circuit.

[0015] In this embodiment, a reference electrode and a working electrode are provided in the open circuit potential measurement circuit. When the system is in use, the reference electrode and the working electrode are placed in a water sample of a water purification device to measure the open circuit potential in the water sample. This potential shows a certain correlation with the concentration of ions in the water.

[0016] The microcontroller circuit is electrically connected to the polarization circuit, and outputs a polarization signal to the polarization circuit so that the polarization circuit generates a corresponding square wave signal to polarize the working electrode. The frequency and amplitude of the square wave signal are adjustable to adapt to different water quality conditions. The potential change after polarization can enhance the ion response on the electrode surface, thereby improving the detection sensitivity.

[0017] The reference electrode and working electrode of the open circuit potential measurement circuit are placed in the water sample, the potential difference between the two electrodes is measured, and the measurement data is transmitted to the current amplification circuit.

[0018] The current amplifier circuit is equipped with a current amplifier and a low-pass filter. During the polarization process, a small current will be generated between the electrodes. This current is amplified by the current amplifier, and after the noise is eliminated by the low-pass filter, it is input to the ADC module of the microcontroller circuit for sampling. Since the current change is closely related to the ion concentration, the microcontroller circuit can calculate the ion concentration of the water sample by collecting this data.

[0019] The microcontroller circuit is responsible for the control of the entire system, including the generation of polarization signals, data acquisition, storage and calculation of ion concentration. At the same time, it also manages the system calibration process, calibrating the system with standard solutions of known concentration to ensure measurement accuracy after long-term operation.

[0020] Among them, the potential value of a standard solution of known concentration can be measured to allow the microcontroller circuit to perform system calibration and ensure measurement accuracy.

[0021] Among them, the microcontroller circuit performs analog-to-digital conversion on the measurement data after current amplification and filtering processing. After generating sampling data, the ion concentration of the water sample can be preliminarily calculated based on the measurement data corresponding to the water sample obtained by sampling, as well as the pre-stored correspondence between the water sample potential and the water sample ion concentration (that is, the correspondence between the sampling data and the ion concentration).

[0022] At the same time, the temperature measurement circuit will also collect the current temperature data of the water sample (the sampling end of the temperature measurement circuit can be placed in the water sample, or attached to the container storing the water sample), and feed the temperature data back to the microcontroller circuit in real time, so that the microcontroller circuit can perform temperature compensation on the initially calculated ion concentration according to the current temperature data of the water sample to correct the value of the ion concentration and finally obtain the current ion concentration of the water sample. Among them, the microcontroller circuit can dynamically adjust the ion concentration measurement result according to the known corresponding relationship between temperature and water sample potential, reducing the influence of temperature on electrochemical measurement.

[0023] In addition, the microcontroller circuit will save the potential and current data of each measurement through the data storage circuit, and record the data during polarization and calibration. In this way, the system can preserve the measurement history for a long time, support data backtracking and comparative analysis, and facilitate the monitoring of water quality trends.

[0024] In one embodiment, a system for measuring ion concentration in water is proposed, which integrates a polarization circuit, an open circuit potential measurement circuit, a current amplification circuit, a microcontroller circuit, a temperature measurement circuit, and a data storage circuit. Through the coordinated work of these components, accurate measurement of ion concentration in water can be achieved. The system can realize real-time monitoring of ion concentration in water, that is, through electrochemical technology and precision circuit design, it ensures real-time and high-precision measurement of ion concentration in water (especially calcium and magnesium ions) to meet the needs of actual use scenarios. In addition, the system supports automatic calibration function and data management to ensure long-term stable operation, as well as facilitate long-term water quality analysis and system optimization.

[0025] This water ion concentration measurement system based on electrochemical principles can achieve real-time, high-precision measurement of water ion concentration (especially calcium and magnesium ions) in water purifiers and other equipment. The circuit integrates open circuit potential detection, polarization circuit, data acquisition and storage and other functional modules, and realizes an automated, low-cost, and easy-to-integrate water quality ion concentration monitoring solution. It can solve the problems of complex existing ion concentration detection equipment, low detection efficiency, and inability to monitor online, and improve the intelligence and automation level of water quality management. It can also be used in handheld portable devices.

[0026] In one embodiment, based on the above embodiment, the polarization circuit generates a square wave signal based on a digital-to-analog converter to apply a periodically changing potential to the working electrode.

[0027] In this embodiment, a square wave signal is generated by a digital-to-analog converter to apply a periodically changing potential to the working electrode to enhance the ion response on its surface. This polarization process can effectively promote the electrochemical reaction between calcium and magnesium ions and the working electrode, thereby improving the sensitivity of ion detection.

[0028] Optional, see Figure 2 and Figure 3 The polarization circuit uses a DAC (digital-to-analog converter) chip U1 to generate a square wave signal, which will be used to apply an alternating voltage to the working electrode for electrode polarization. The IIC of the microcontroller U4 in the microcontroller circuit is controlled with U1 to set the frequency and amplitude to achieve square wave generation. The output of U1 passes through a voltage follower U2 to ensure that the load capacity of the square wave signal is large enough and not distorted. The output of the voltage follower is connected to the working electrode through the first resistor R6 and the second resistor R31, which is used to apply a square wave voltage signal to polarize the electrode.

[0029] The frequency and amplitude of the polarization signal can be flexibly controlled by the microcontroller U4 to adapt to different water quality environments. This automatic control simplifies user operation and enables the system to always maintain high measurement accuracy under different water quality conditions.

[0030] In this way, the square wave signal generated by the digital-to-analog converter is used to automatically polarize the electrode to enhance the ion response, which can significantly improve the detection sensitivity of the water ion concentration measurement system. The system can not only measure the ion concentration in water in real time and with high precision, but also has automatic calibration and data management functions, which is suitable for various water quality monitoring scenarios.

[0031] In one embodiment, based on the above embodiment, the microcontroller circuit includes a microcontroller with a built-in 24-bit delta-sigma ADC; The reference electrode is connected to a high impedance voltage follower via a resistor, and the output end of the high impedance voltage follower is connected to a 24-bit Δ-ΣADC differential positive input end inside the microcontroller via a first low-pass filter; The working electrode is connected to another high impedance voltage follower via another resistor, the output end of the other high impedance voltage follower is connected to the current amplifier via a second low pass filter, and the output end of the current amplifier is connected to the 24-bit Δ-ΣADC differential negative input end inside the microcontroller via a third low pass filter.

[0032] In this embodiment, refer to Figure 3 The microcontroller circuit is provided with a microcontroller U4, and the microcontroller U4 has a built-in 24-bit Δ-Σ ADC as an ADC module of the microcontroller circuit.

[0033] Optional, see Figure 4The open circuit potential measurement circuit and the current amplifier circuit can be integrated into a circuit module. The reference electrode of the open circuit potential measurement circuit is connected to the first high impedance voltage follower U7 through the third resistor R22. The output end of the first high impedance voltage follower U7 is connected to the 24-bit Δ-ΣADC differential positive input end inside the microcontroller U4 after passing through the first low-pass filter. The first low-pass filter is composed of the fourth resistor R25 and the first capacitor C30.

[0034] The working electrode of the open circuit potential measurement circuit is connected to the second high impedance voltage follower U8 through the fifth resistor R28, and the output end of the second high impedance voltage follower U8 is connected to the current amplifier U10 in the current amplifier circuit after passing through the second low-pass filter. The second low-pass filter is composed of the sixth resistor R29 and the second capacitor C31; the amplification factor of the current amplifier A=R26 / R29, wherein the seventh resistor R26 and the third capacitor C27 are connected in parallel between the output end and the negative input end of the current amplifier U10.

[0035] The output of the current amplifier U10 is connected to the 24-bit Δ-ΣADC differential negative input terminal inside the microcontroller U4 after passing through the third low-pass filter. The third low-pass filter is composed of an eighth resistor R30 and a fourth capacitor C34.

[0036] At the same time, the square wave signal generated by the polarization circuit is connected to the working electrode through the ninth resistor R31.

[0037] In this way, the use of 24-bit Δ-Σ ADC and high-impedance op amp can ensure the accuracy and stability of the measurement signal, and can accurately detect the concentration changes of trace ions in water quality. That is, the system uses an MCU with an internal 24-bit Δ-Σ ADC for signal acquisition, and cooperates with a high-impedance op amp to ensure the accurate measurement of open-circuit potential and current, thereby accurately detecting the concentration changes of trace ions in water, especially suitable for low-concentration calcium and magnesium ion measurements.

[0038] In one embodiment, based on the above embodiment, referring to Figure 3 The microcontroller circuit and the temperature measurement circuit can be integrated into a circuit module. One end of the thermistor RT1 of the temperature measurement circuit is connected to the power supply pin of the microcontroller U4, and the other end is connected to one end of the tenth resistor R16. The other end of the tenth resistor R16 is connected to the ground, and the connection point of RT1 and R16 is connected to the ADC pin of the microcontroller U4.

[0039] Reference Figure 5 ,In the data storage circuit, the data storage chip U3 and the microcontroller U4 read and write through the IIC communication port, ,save the potential and current data of each measurement, and ,record the data during polarization and calibration.

[0040] In one embodiment, based on the above embodiment, referring to Figure 6 The system for measuring the ion concentration in water also includes a power input circuit, which is electrically connected to the power supply end of the microcontroller circuit and is used to power the system for measuring the ion concentration in water.

[0041] Optionally, the water ion concentration measurement system further includes a display module, which is electrically connected to the microcontroller circuit and is used to display the measured ion concentration. The display module is responsible for displaying the measured ion concentration to the user in an intuitive and easy-to-understand manner. In addition to being able to display the measurement data in real time, the display module can also provide other relevant system information, such as operating status, error prompts, etc.

[0042] Optionally, the water ion concentration measurement system also includes an alarm module, which is electrically connected to the microcontroller circuit and is used to issue an alarm when the ion concentration exceeds a threshold value. The main function of the alarm module is to issue an alarm signal in time when the measured ion concentration exceeds a preset threshold value, reminding the user or operator to take corresponding measures. By introducing the alarm module, the water ion concentration measurement system can monitor the change of ion concentration in real time, and issue an alarm signal in time when it exceeds the safety range, thereby improving the safety performance of the system.

[0043] Optional, see Figure 3 , the alarm module can be integrated into the microcontroller circuit, and the speaker LS1 can be used for alarm prompts.

[0044] In addition, the present application further proposes a water purification system, which includes a water purification device and a system for measuring the ion concentration in water. The specific structure of the system for measuring the ion concentration in water refers to the above-mentioned embodiment. Since the present water purification system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the technical effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0045] In one embodiment, based on the above embodiment, the present application further proposes a method for measuring ion concentration in water, which is applied to the system for measuring ion concentration in water described in the above embodiment; Figure 7 , the method for measuring the ion concentration in water includes: Step S10, the microcontroller circuit controls the polarization circuit to generate a corresponding square wave signal according to the set frequency and amplitude, so as to polarize the working electrode in the open circuit potential measurement circuit; Step S20, measuring the water sample of the water purification equipment based on the open circuit potential measurement circuit, and performing current amplification and filtering processing on the measurement data using the current amplification circuit; Step S30, performing analog-to-digital conversion on the measurement data after current amplification and filtering to generate sampling data; Step S40, based on the pre-stored correspondence between the sampling data and the ion concentration, preliminarily calculating the ion concentration using the sampling data; Step S50: calibrate the preliminarily calculated ion concentration based on the temperature data of the water sample collected by the temperature measurement circuit to obtain the ion concentration of the water sample.

[0046] In this embodiment, the execution terminal of the embodiment is a microcontroller circuit.

[0047] The microcontroller circuit controls the polarization circuit to generate a corresponding square wave signal according to the preset frequency and amplitude. The square wave signal is output to the working electrode of the open circuit potential measurement circuit to polarize the working electrode, enhance the ion response, and improve the detection sensitivity.

[0048] Among them, the frequency and amplitude of the square wave signal can be adjusted according to water quality conditions to ensure effective polarization under different water quality conditions.

[0049] The open circuit potential measurement circuit measures the potential difference between the working electrode and the reference electrode in the measured water sample and transmits the data to the current amplifier circuit for processing. After the measurement data is transmitted to the current amplifier circuit, the current amplifier circuit performs current amplification and filtering on the measurement data to eliminate noise and ensure data quality.

[0050] The microcontroller circuit performs analog-to-digital conversion on the measured data after current amplification and filtering to generate sampling data. The analog signal is converted into a digital signal to facilitate data processing by the microcontroller circuit.

[0051] Furthermore, the microcontroller circuit preliminarily calculates the ion concentration using the sampling data based on the pre-stored correspondence between the sampling data and the ion concentration, that is, preliminarily estimates the ion concentration in the water sample based on the collected potential data combined with the pre-stored correspondence between the potential and the ion concentration.

[0052] Then, based on the temperature data of the water sample collected by the temperature measurement circuit, the initially calculated ion concentration is calibrated to obtain the final ion concentration of the water sample. That is, the value of the ion concentration is corrected by temperature compensation, the influence of temperature on the electrochemical measurement is reduced, and the measurement accuracy is improved.

[0053] The temperature measurement circuit collects water sample temperature data in real time and feeds it back to the microcontroller circuit. The microcontroller circuit dynamically adjusts the ion concentration measurement result according to the known corresponding relationship between temperature and potential to obtain the final ion concentration value.

[0054] This ensures that the system can accurately and efficiently measure the ion concentration in water. This method combines electrochemical technology, precision circuit design, data processing and temperature compensation to achieve real-time, high-precision measurement of ion concentration in water. It is suitable for a variety of water quality monitoring scenarios and improves the intelligence and automation level of water quality management.

[0055] In one embodiment, based on the above embodiment, after the step of calibrating the preliminarily calculated ion concentration based on the temperature data of the water sample collected by the temperature measurement circuit to obtain the ion concentration of the water sample, the method further includes: Based on the ion concentration of the water sample, the water purification parameters of the water purification equipment are adjusted.

[0056] In this embodiment, the microcontroller circuit obtains the ion concentration data after temperature calibration, and compares it with a preset ion concentration standard (such as a drinking water standard, an industrial water standard, etc.) to determine whether it meets the preset standard.

[0057] Optionally, the microcontroller circuit compares the measured ion concentration with a preset threshold. If the ion concentration is higher than the preset upper limit, the water quality is unqualified; if the ion concentration is lower than the preset lower limit, the water quality is too pure, which may affect the taste or other properties of the water. The microcontroller circuit identifies the water quality status (e.g., "qualified", "needs adjustment", "needs filter replacement", etc.) based on the comparison result.

[0058] Optionally, the microcontroller circuit determines the water purification parameters that need to be adjusted according to the water quality status. The water purification parameters may include: Filtration speed: Adjust the filtration speed to affect the rate at which water passes through the filter element; Reverse osmosis pressure: Adjust the reverse osmosis pressure to affect the filtering effect of the reverse osmosis membrane; Dosage: Adjust the dosage to affect the amount of water purifier added; Flushing cycle: Adjust the flushing cycle to affect the cleaning frequency of the filter element.

[0059] Optionally, the microcontroller circuit generates a specific adjustment strategy according to a preset adjustment algorithm. For example, if the ion concentration is high, the filtration speed is reduced or the dosage is increased; if the ion concentration is low, the filtration speed is increased or the dosage is reduced.

[0060] Optionally, according to the determined adjustment strategy, the corresponding actuator is driven to control the water purification equipment to perform parameter adjustment, thereby achieving automatic adjustment of the water purification parameters.

[0061] Optionally, the microcontroller circuit drives the actuators (such as motors, solenoid valves, dosing pumps, etc.) in the water purification equipment to adjust parameters by outputting control signals; adjusts the filtration speed of the filter element by controlling the motor speed; adjusts the water inlet pressure of the reverse osmosis membrane by controlling the power of the booster pump; adjusts the amount of water purifier added by controlling the output of the dosing pump; and adjusts the flushing frequency of the filter element by controlling the switching time of the solenoid valve and the flushing valve.

[0062] Optionally, record the adjusted water purification parameters and provide feedback on the adjustment results. Record the parameter values ​​for each adjustment to facilitate subsequent analysis and optimization; provide feedback on the adjustment results to ensure that the water purification equipment achieves the expected results. Record the adjusted water purification parameters in memory to form an operation log for subsequent analysis and optimization.

[0063] Optionally, the adjustment result is fed back to the user or the control system, for example, by displaying the current water purification parameters and water quality status on a display screen, or uploading data to the cloud through a communication interface.

[0064] After adjusting the parameters, the water purification equipment continues to monitor the water quality and operating status. Ensure that the water quality continues to meet the standards and is further optimized when necessary. Among them, after adjusting the parameters, the water purification equipment continues to monitor the water quality through the open circuit potential measurement circuit and the temperature measurement circuit. According to the results of continuous monitoring, the microcontroller circuit can dynamically adjust the water purification parameters to ensure that the water quality is always kept in the best state.

[0065] In one embodiment, the function of automatically adjusting the parameters of the water purification equipment according to the measured ion concentration of the water sample is realized, ensuring that the water purification equipment can automatically optimize the operating parameters according to the real-time water quality data to ensure that the water quality of the outlet meets the preset standards. This process not only improves the intelligence and automation level of the water purification equipment, but also ensures the real-time and high efficiency of water quality management, and is applicable to a variety of water quality monitoring and water purification scenarios.

[0066] In one embodiment, based on the above embodiment, the method for measuring the ion concentration in water includes: Based on the measurement system of ion concentration in water, the ion concentration corresponding to the standard solution of known concentration is measured; Based on the comparison results of the measured ion concentration and the known concentration, the measurement system of the ion concentration in water is calibrated.

[0067] In this embodiment, a standard solution with a known concentration is selected, and the accuracy of the measurement system is verified by using the standard solution with a known concentration.

[0068] Optionally, by executing steps S10 to S50, the open circuit potential measurement circuit of the measurement system is used to measure the ion concentration of a standard solution of known concentration, and actual measurement data of the standard solution is obtained for subsequent comparison and calibration.

[0069] Among them, the collected data can be preliminarily processed, such as removing outliers, calculating average values, etc., to ensure the reliability of the data.

[0070] Compare the measured ion concentration of the standard solution with the known concentration. Calculate the error value of the measurement system to provide a basis for calibration. Analyze the distribution of the error value to determine the accuracy and stability of the measurement system. Calculate the calibration coefficient based on the error value, and use the calibration coefficient to correct the output data of the measurement system to improve its accuracy.

[0071] Optionally, the calibration method may include linear regression, polynomial fitting, etc. Linear regression is to linearly fit the measured value with the known concentration to obtain a calibration line and calculate the calibration coefficient; polynomial fitting is to use the polynomial fitting method to obtain a more accurate calibration curve under nonlinear error conditions. The calibration coefficient is calculated by the slope and intercept of the calibration line or curve obtained by fitting, which is used to correct the subsequent measurement data.

[0072] The calibration coefficients are stored in the microcontroller circuit to update the measurement system's database and algorithms, ensuring the accuracy and reliability of subsequent measurement results.

[0073] Optionally, the calculated calibration coefficients are stored in a data storage circuit to form a calibration table or calibration formula. According to the calibration coefficients, the data processing algorithm of the measurement system is updated to ensure the accuracy of the measurement results.

[0074] In practical applications, the system's calibration coefficients can be dynamically updated according to actual needs to cope with changes in water quality or other environmental factors.

[0075] In this way, the water ion concentration measurement system achieves high-precision calibration, ensuring the accuracy and reliability of the measurement results. This process not only improves the intelligence and automation level of water quality monitoring, but also provides reliable data support for water quality management, which is applicable to a variety of water quality monitoring and water purification scenarios.

[0076] In summary, the measurement system of ion concentration in water, the water purification system and the method for measuring ion concentration in water provided in the embodiments of the present application are integrated with a polarization circuit, an open circuit potential measurement circuit, a current amplification circuit, a microcontroller circuit, a temperature measurement circuit and a data storage circuit. Through the collaborative work of these components, accurate measurement of ion concentration in water can be achieved. The system can realize real-time monitoring of ion concentration in water, that is, through electrochemical technology and precision circuit design, it ensures real-time and high-precision measurement of ion concentration in water (especially calcium and magnesium ions) to meet the needs of actual use scenarios. And the system supports automatic calibration function and data management to ensure long-term stable operation, and facilitates long-term water quality analysis and system optimization.

[0077] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media provided in this application and used in the embodiments may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0078] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0079] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A system for measuring ion concentration in water, characterized in that: include: Polarization circuit, open circuit potential measurement circuit, current amplification circuit, microcontroller circuit, temperature measurement circuit and data storage circuit; The polarization circuit is electrically connected to the working electrode in the open circuit potential measurement circuit and polarizes the working electrode; The open circuit potential measurement circuit is electrically connected to the microcontroller circuit via the current amplification circuit; the reference electrode and the working electrode of the open circuit potential measurement circuit are placed in the water sample of the water purification device, the corresponding open circuit potential is measured, and the measurement data is transmitted to the current amplification circuit; A current amplifier circuit is used to perform current amplification and filtering on the measurement data and transmit the result to the microcontroller circuit; The temperature measurement circuit is electrically connected to the microcontroller circuit, and is used to collect temperature data of the water sample and transmit it to the microcontroller circuit; A microcontroller circuit is used to generate a polarization signal corresponding to the polarization circuit, calculate the ion concentration of the water sample according to the measurement data and the temperature data, and calibrate the system according to a standard solution of known concentration; The data storage circuit is electrically connected to the microcontroller circuit and is used for storing relevant data transmitted by the microcontroller circuit.

2. The system for measuring ion concentration in water according to claim 1, characterized in that: The polarization circuit generates a square wave signal based on a digital-to-analog converter, and applies a periodically changing potential to the working electrode.

3. The system for measuring ion concentration in water according to claim 1 or 2, characterized in that: The microcontroller circuit includes a microcontroller with a built-in 24-bit delta-sigma ADC; The reference electrode is connected to a high impedance voltage follower via a resistor, and the output end of the high impedance voltage follower is connected to a 24-bit Δ-ΣADC differential positive input end inside the microcontroller via a first low-pass filter; The working electrode is connected to another high impedance voltage follower via another resistor, the output end of the other high impedance voltage follower is connected to the current amplifier via a second low pass filter, and the output end of the current amplifier is connected to the 24-bit Δ-ΣADC differential negative input end inside the microcontroller via a third low pass filter.

4. The system for measuring ion concentration in water according to claim 1, characterized in that: The system for measuring the ion concentration in water also includes a power input circuit, which is electrically connected to the power supply terminal of the microcontroller circuit and is used to supply power to the system for measuring the ion concentration in water.

5. The system for measuring ion concentration in water according to claim 1, characterized in that: The system for measuring ion concentration in water also includes a display module, which is electrically connected to the microcontroller circuit and is used to display the measured ion concentration.

6. The system for measuring ion concentration in water according to claim 1, characterized in that: The system for measuring ion concentration in water also includes an alarm module, which is electrically connected to the microcontroller circuit and is used to issue an alarm when the ion concentration exceeds a threshold value.

7. A water purification system, characterized in that: The invention comprises a water purification device and a system for measuring the ion concentration in water as claimed in any one of claims 1 to 6.

8. A method for measuring ion concentration in water, characterized in that: The method for measuring ion concentration in water is applied to a system for measuring ion concentration in water as claimed in any one of claims 1 to 6; the method for measuring ion concentration in water comprises: The microcontroller circuit controls the polarization circuit to generate a corresponding square wave signal according to the set frequency and amplitude, so as to polarize the working electrode in the open circuit potential measurement circuit; The water sample of the water purification equipment is measured based on the open circuit potential measurement circuit, and the current amplification circuit is used to amplify and filter the measurement data; Perform analog-to-digital conversion on the measured data after current amplification and filtering to generate sampling data; Based on the correspondence between the pre-stored sampling data and the ion concentration, the ion concentration is preliminarily calculated using the sampling data; Based on the temperature data of the water sample collected by the temperature measurement circuit, the initially calculated ion concentration is calibrated to obtain the ion concentration of the water sample.

9. The method for measuring ion concentration in water according to claim 8, characterized in that: After the step of calibrating the preliminarily calculated ion concentration based on the temperature data of the water sample collected by the temperature measurement circuit to obtain the ion concentration of the water sample, the method further includes: Based on the ion concentration of the water sample, the water purification parameters of the water purification equipment are adjusted.

10. The method for measuring ion concentration in water according to claim 8 or 9, characterized in that: The method for measuring the ion concentration in the water comprises: Based on the measurement system of ion concentration in water, the ion concentration corresponding to the standard solution of known concentration is measured; Based on the comparison results of the measured ion concentration and the known concentration, the measurement system of the ion concentration in water is calibrated.

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