Self-calibration device and method for detecting ion concentration in water

Abstract

The invention relates to the technical field of ion concentration physical analysis, in particular to a self-calibration device and method for ion concentration detection in water, and the device comprises a control circuit module, a detection circuit module, a standard solution module, an ion detection module, a recovery module, a deionized water storage module and a wastewater discharge module, the detection circuit module and the control circuit module are connected through a flexible flat cable, and the standard solution module, the recovery module, the deionized water storage module and the wastewater discharge module are connected with the ion detection module through hoses, so that accurate measurement of ions can be realized by detecting and calibrating potential data corresponding to ion concentration in a standard solution.

Description

Technical Field

[0001] The present application relates to the technical field of physical analysis of ion concentration, and in particular to a self-calibration device and method for detecting ion concentration in water. Background Art

[0002] In today's society, the quality of water resources is closely related to people's lives, production, and the ecological environment. With the acceleration of industrialization and urbanization, water pollution has become increasingly serious. Accurate detection of various ionic components in water plays a vital role in ensuring water quality safety. Traditional methods for detecting ions in water mostly rely on laboratory analysis, requiring professionals to operate complex instruments and equipment. From water sample collection and transportation to the final test results, it often takes a long time and cannot meet the needs of real-time, online monitoring. Moreover, these traditional detection methods have poor stability in actual application scenarios and are easily affected by environmental factors such as temperature and humidity, resulting in deviations in test results.

[0003] In recent years, although a number of portable or online water quality ion detection devices have emerged, they still face many technical difficulties. Among them, the calibration problem is particularly prominent. After long-term use, the detection potential range of existing detection devices will change due to factors such as sensor aging, changes in the working environment, and performance drift of electronic components. However, most devices lack effective self-calibration functions and require regular manual calibration. This not only increases labor costs and maintenance difficulties, but may also make the detection data unreliable due to untimely calibration, making it impossible to provide accurate data support for water monitoring, water control, and environmental governance, thereby affecting the scientificity and effectiveness of decision-making.

[0004] Currently, there is little research on self-calibration devices and systems for detecting ions such as sodium, potassium, and calcium in water. Existing technology can provide an online water quality calibration and quality control instrument, which mainly includes a housing and a display. The housing is equipped with a display. Inside the housing are a first peristaltic pump, a second peristaltic pump, a solenoid valve, a sample chamber, a liquid level switch, and a magnetic stirrer. One side of the housing is equipped with a deionized water access port and a standard liquid access port. The other side of the housing is equipped with a sample output port and an air hole. The bottom of the housing is equipped with a waste liquid discharge port. This device realizes automatic calibration and quality control tasks once a day, improving the long-term stability of the instrument. However, its structure is relatively complex, the volume is large, and maintenance is difficult. In addition, existing technology can also realize fast and accurate water quality data processing in a marine environment through an online intelligent calibration method for initial values of marine water quality detection, enhancing the stability and portability of the detector, reducing error interference, and improving the accuracy of measurement results. However, its application scenarios are limited and cannot meet people's daily use.

[0005] At present, the difficulty in developing a self-calibration device and system for detecting ion concentration in water lies mainly in the coordination of multiple modules and the compatibility of miniaturized equipment. It requires careful design of interface protocols, optimization of data flows, and coordination of software and hardware resources of each module, which involves a large amount of interdisciplinary knowledge and repeated debugging. Considering the portable application scenario, the system needs to achieve miniaturization without sacrificing performance. Integrating numerous complex functions into a compact device means selecting smaller, higher-performance components, rearranging the circuit board, optimizing heat dissipation, waterproofing and other structural designs, and solving problems such as increased electromagnetic interference and component fragility caused by space compression. This places extremely high demands on industrial design and electronic engineering technology.

[0006] In summary, it is difficult for existing technologies to achieve the coordination of multiple modules and the compatibility of miniaturized devices, which needs to be solved urgently. Summary of the Invention

[0007] The present application provides a self-calibration device and method for detecting ion concentration in water, in order to solve the problems that the prior art has difficulty in achieving the coordination of multiple modules and the compatibility of miniaturized equipment.

[0008] The first aspect of the present application provides a self-calibration device for detecting ion concentration in water, including: a control circuit module, which is used to output corresponding analog signals and digital signals through a preset single-chip microcomputer chip and MOS tube circuit; a detection circuit module, which is used to collect voltage signals corresponding to the water sample to be detected through two receiving ends in a preset front-end acquisition circuit, and calculate the relative voltage difference corresponding to the two receiving ends, and amplify and filter the relative voltage difference to obtain a voltage signal that meets preset stability requirements, and determine a voltage-concentration relationship value based on the voltage signal; a standard solution module, which is used to drive calibration solutions of multiple concentrations according to a preset parallel calibration structure, and based on the analog signal and the digital signal, transport the calibration solution of each concentration to a preset ion detection module; and an ion detection module, which is used to form an open circuit voltage between the working electrode and the reference electrode when the calibration solution of each concentration contacts the preset working electrode and reference electrode, so as to determine the ion concentration value corresponding to the open circuit voltage based on the voltage-concentration relationship value.

[0009] Optionally, in one embodiment of the present application, it also includes: a recovery module, which is used to receive the analog signal through a preset recovery peristaltic pump to transport the calibrated calibration solution after the calibration of any calibration solution of the multiple concentrations is completed, and when the preset recovery gate valve receives the digital signal, the calibrated calibration solution is transported to the preset recovery solution chamber; a deionized water storage module, which is used to store a target volume of deionized water in the preset deionized water chamber, and transport the deionized water to the calibration solution chamber in the ion detection module through a preset water pump to dilute the residual droplets of the calibration solution; a wastewater discharge module, which is used to allow the residual droplets of the diluted calibration solution to flow out along the preset delivery channel after the preset wastewater gate valve receives the digital signal, and blow out the residual droplets of the diluted calibration solution through a preset micro air pump.

[0010] Optionally, in one embodiment of the present application, the detection circuit module includes: the front-end acquisition circuit, used to obtain the voltage signals corresponding to the two receiving ends, and calculate the corresponding relative voltage difference based on the voltage signals of the two receiving ends; an amplification circuit, used to amplify the relative voltage difference; a filtering circuit, used to low-pass filter the amplified relative voltage difference to obtain a voltage signal that meets the preset stability requirements, and transmit the voltage signal to a preset single-chip microcomputer chip.

[0011] Optionally, in one embodiment of the present application, the standard solution module includes: a calibration solution;

[0012] The peristaltic pump is used to receive the analog signal and deliver a standard solution of corresponding concentration according to the analog signal; the calibration gate valve is used to receive the digital signal and control the opening and closing of the corresponding water channel according to the digital signal.

[0013] Optionally, in one embodiment of the present application, the ion detection module includes: a calibration solution chamber for receiving the calibration solutions of multiple concentrations; a working electrode and a reference electrode for forming the open circuit voltage when in contact with the calibration solution of each concentration, and the relationship between the open circuit voltage and the concentration of the ion to be measured conforms to a preset Nernst equation; and an electrode fixing plate for mechanically fixing to the calibration solution chamber.

[0014] Optionally, in one embodiment of the present application, the control circuit module includes: a single-chip microcomputer chip, used to control the timing logic of each circuit based on a pre-stored self-calibration system control program and calibration progress to generate a corresponding digital signal or analog signal, and receive the open-circuit voltage output by the ion detection module, and convert the open-circuit voltage to update a preset voltage-concentration relationship value; a power management circuit, used to convert the DC voltage input to the control circuit module to obtain a corresponding target DC voltage, and power the single-chip microcomputer chip and a preset Bluetooth chip through the target DC voltage; a MOS tube circuit, used to receive the digital signal output by the single-chip microcomputer chip, and use the digital signal to control the on and off of the gate valve; the Bluetooth chip, used to receive the calibration result of the single-chip microcomputer chip and transmit it wirelessly to the terminal.

[0015] The second aspect of the present application provides a self-calibration method for detecting ion concentration in water, comprising the following steps: generating corresponding analog signals and digital signals through a preset single-chip microcomputer chip and MOS tube circuit; collecting voltage signals corresponding to the water sample to be detected through two receiving ends in a preset front-end acquisition circuit, and calculating the relative voltage difference corresponding to the two receiving ends, and amplifying and filtering the relative voltage difference to obtain a voltage signal that meets the preset stability requirements, and determining a voltage-concentration relationship value based on the voltage signal; driving calibration solutions of multiple concentrations according to a preset parallel calibration structure, and based on the analog signal and the digital signal, delivering the calibration solution of each concentration to a preset ion detection module, so as to generate an open circuit voltage between the working electrode and the reference electrode when the calibration solution of each concentration contacts the preset working electrode and reference electrode, and determining the ion concentration value corresponding to the open circuit voltage based on the voltage-concentration relationship value.

[0016] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the self-calibration method for detecting ion concentration in water as described in the above embodiment.

[0017] A fourth aspect of the present application provides a computer-readable storage medium, which stores a computer program. When the program is executed by a processor, it implements the above self-calibration method for detecting ion concentration in water.

[0018] A fifth aspect of the present application provides a computer program product, including a computer program, which is executed to implement the above-mentioned self-calibration method for detecting ion concentration in water.

[0019] Therefore, the embodiments of the present application have the following beneficial effects:

[0020] The embodiment of the present application includes a control circuit module for outputting corresponding analog signals and digital signals through a preset single-chip microcomputer chip and a MOS tube circuit; a detection circuit module for collecting the voltage signal corresponding to the water sample to be detected through two receiving ends in a preset front-end acquisition circuit, and calculating the relative voltage difference corresponding to the two receiving ends, and amplifying and filtering the relative voltage difference to obtain a voltage signal that meets the preset stability requirements, and determining the voltage-concentration relationship value based on the voltage signal; a standard solution module for driving calibration solutions of multiple concentrations according to a preset parallel calibration structure, and based on the analog signal and the digital signal, delivering the calibration solution of each concentration to a preset ion detection module; an ion detection module for forming an open circuit voltage between the working electrode and the reference electrode when the calibration solution of each concentration contacts the preset working electrode and reference electrode, so as to determine the ion concentration value corresponding to the open circuit voltage based on the voltage-concentration relationship value. The present application has a simple structure and low cost, fills the gap in the research of portable ion detection self-calibration devices, and is expected to achieve widespread batch application. Thus, it solves the problems that the existing technology is difficult to achieve multi-module collaboration and compatibility of miniaturized equipment.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is an example diagram of a self-calibration device for detecting ion concentration in water according to an embodiment of the present application;

[0024] Figure 2 A schematic diagram of a control circuit module provided in accordance with an embodiment of the present application;

[0025] Figure 3 A schematic diagram of a detection circuit module provided in accordance with an embodiment of the present application;

[0026] Figure 4 A schematic diagram of a standard solution module provided in one embodiment of the present application;

[0027] Figure 5 A schematic diagram of an ion detection module provided in one embodiment of the present application;

[0028] Figure 6 A schematic diagram of a recycling module provided in one embodiment of the present application;

[0029] Figure 7 A schematic diagram of a deionized water storage module provided in accordance with an embodiment of the present application;

[0030] Figure 8 A schematic diagram of a wastewater discharge module provided in accordance with an embodiment of the present application;

[0031] Figure 9 This is a flow chart of a self-calibration method for detecting ion concentration in water provided according to an embodiment of the present application;

[0032] Figure 10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0033] Among them, 10-self-calibration device for detecting ion concentration in water; 100-control circuit module, 101-single-chip microcomputer chip, 102-power management circuit, 103-MOS tube circuit, 104-Bluetooth chip; 200-detection circuit module, 201-front-end acquisition circuit, 202-amplification circuit, 203-filter circuit; 300-standard solution module, 301-calibration solution, 302-peristaltic pump, 303-calibration gate valve; 400-ion detection module, 401- Calibration solution chamber, 402-working electrode, 403-reference electrode, 404-electrode fixing plate; 500-recovery module, 501-recovery gate valve, 502-recovery solution chamber, 503-recovery peristaltic pump; 600-deionized water storage module, 601-water pump, 602-deionized water chamber; 700-wastewater discharge module, 701-wastewater gate valve, 702-micro air pump, 703-wastewater chamber; 1001-memory, 1002-processor, 1003-communication interface. DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present application, examples of which 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.

[0035] The following describes a self-calibration device and method for detecting ion concentration in water according to an embodiment of the present application with reference to the accompanying drawings. In response to the problems mentioned in the above background technology, the present application provides a self-calibration method for detecting ion concentration in water, in which the device includes a control circuit module for outputting corresponding analog signals and digital signals through a preset single-chip microcomputer chip and a MOS tube circuit; a detection circuit module for collecting voltage signals corresponding to the water sample to be detected through two receiving terminals in a preset front-end acquisition circuit, and calculating the relative voltage difference corresponding to the two receiving terminals, and amplifying and filtering the relative voltage difference to obtain a voltage signal that meets the preset stability requirements, and determining a voltage-concentration relationship value based on the voltage signal; a standard solution module for driving calibration solutions of multiple concentrations according to a preset parallel calibration structure, and delivering each concentration of calibration solution to a preset ion detection module based on the analog signal and the digital signal; and an ion detection module for forming an open circuit voltage between the working electrode and the reference electrode when each concentration of calibration solution contacts a preset working electrode and a reference electrode, so as to determine the ion concentration value corresponding to the open circuit voltage based on the voltage-concentration relationship value. This application has a simple structure and low cost, filling the gap in the research of portable ion detection self-calibration devices and is expected to achieve widespread batch application. Thus, it solves the problems of the existing technology in achieving good multi-module coordination and compatibility of miniaturized devices.

[0036] In order to facilitate those skilled in the art to understand the execution logic of the self-calibration device for detecting ion concentration in water of the present application, the logical architecture of the self-calibration device for detecting ion concentration in water of the present application is briefly described below in conjunction with the accompanying drawings.

[0037] like Figure 1 As shown, the self-calibration device 10 for detecting ion concentration in water of the present application includes a control circuit module 100, a detection circuit module 200, a standard solution module 300, an ion detection module 400, a recovery module 500, a deionized water storage module 600, and a wastewater discharge module 700. The control lines of the control circuit module 100 and the detection circuit module 200 are connected to a breakout board, which then leads control lines to the standard solution module 300, the recovery module 500, the deionized water storage module 600, and the wastewater discharge module 700. The water circuits of the standard solution module 300, the recovery module 500, the deionized water storage module 600, and the wastewater discharge module 700 are connected to the ion detection module 400 via a hose. The volume specification of the ion detection module 400 is 10 mL. The ion detection module 400 leads a voltage detection line to the detection circuit module 200.

[0038] Specifically, Figure 1 4 is a block diagram of a self-calibration device for detecting ion concentration in water according to an embodiment of the present application.

[0039] like Figure 1 As shown, the self-calibration device 10 for detecting ion concentration in water includes: a control circuit module 100 , a detection circuit module 200 , a standard solution module 300 and an ion detection module 400 .

[0040] The control circuit module 100 is used to output corresponding analog signals and digital signals through a preset single-chip microcomputer chip and MOS tube circuit.

[0041] Optionally, in one embodiment of the present application, the control circuit module 100 includes: a single-chip microcomputer chip 101 , a power management circuit 102 , a MOS tube circuit 103 and a Bluetooth chip 104 .

[0042] Among them, the single-chip microcomputer chip 101 is used to control the timing logic of each circuit based on the pre-stored self-calibration system control program and calibration schedule to generate corresponding digital signals or analog signals, and receive the open-circuit voltage output by the ion detection module 400, and convert the open-circuit voltage to update the preset voltage-concentration relationship value.

[0043] The power management circuit 102 is used to convert the DC voltage input to the control circuit module 100 to obtain a corresponding target DC voltage, and to power the single-chip microcomputer chip 101 and the preset Bluetooth chip 104 through the target DC voltage.

[0044] The MOS transistor circuit 103 is used to receive the digital signal output by the single chip microcomputer chip 101 and use the digital signal to control the on and off of the gate valve.

[0045] The Bluetooth chip 104 is used to receive the calibration result of the single chip microcomputer chip 101 and transmit it wirelessly to the terminal to display the calibration result.

[0046] It should be noted that if Figure 2 As shown, the control circuit module 100 in the embodiment of the present application is composed of a single-chip microcomputer chip, a power management circuit, a MOS tube circuit and a Bluetooth chip, and the module is integrally welded on an integrated circuit board.

[0047] Specifically, the single-chip microcomputer chip 101 is connected to the power management circuit 102, the MOS tube circuit 103, and the Bluetooth chip 104, which stores the control program of the self-calibration system, controls the timing logic of each circuit according to the calibration progress, and outputs a digital signal or an analog signal according to the control logic and control timing of the self-calibration device 10 for detecting ion concentration in water according to the embodiment of the present application; the power management circuit 102 can use the URB2405YMD-10WR3 chip from Jinshengyang and the AMS1117 chip from Meisenco to convert the 24V DC voltage of the input control circuit module 100 into the 3.3V power supply required by the single-chip microcomputer chip 101 and the Bluetooth chip 104; the MOS tube circuit 103 receives the digital signal output by the single-chip microcomputer chip 101 for controlling the on and off of the gate valve; the signal pin of the Bluetooth chip 104 is connected to the USART pin of the single-chip microcomputer chip 101, receives the calibration data of the receiving device, and is used for transmitting signals between the self-calibration device 10 for detecting ion concentration in water and the intelligent monitoring terminal.

[0048] Therefore, the embodiment of the present application utilizes the single-chip microcomputer chip 101, the power management circuit 102, the MOS tube circuit 103 and the Bluetooth chip to construct the control circuit module 100, thereby effectively ensuring the realization of self-calibration of water quality ion concentration detection.

[0049] The detection circuit module 200 is used to collect the voltage signal corresponding to the water sample to be detected through the two receiving ends in the preset front-end acquisition circuit, calculate the relative voltage difference corresponding to the two receiving ends, amplify and filter the relative voltage difference to obtain a voltage signal that meets the preset stability requirements, and determine the voltage-concentration relationship value based on the voltage signal.

[0050] Furthermore, the embodiments of the present application can collect the voltage signals corresponding to the water sample to be detected through the two receiving ends of the front-end acquisition circuit in the detection circuit module 200, calculate the relative voltage difference, and amplify and filter the relative voltage difference to obtain a voltage signal that meets the preset stability requirements, so as to update the voltage-concentration relationship value according to the voltage signal.

[0051] Optionally, in one embodiment of the present application, the detection circuit module 200 includes: a front-end acquisition circuit 201 , an amplification circuit 202 and a filtering circuit 203 .

[0052] The front-end acquisition circuit 201 is used to obtain voltage signals corresponding to the two receiving ends, and calculate the corresponding relative voltage difference according to the voltage signals of the two receiving ends.

[0053] The amplifier circuit 202 is used to amplify the relative voltage difference.

[0054] The filter circuit 203 is used to perform low-pass filtering on the amplified relative voltage difference to obtain a voltage signal that meets a preset stability requirement, and transmit the voltage signal to the preset single-chip microcomputer chip 101.

[0055] Specifically, the detection circuit module 200 in the embodiment of the present application is composed of a front-end acquisition circuit 201 , an amplification circuit 202 and a filtering circuit 203 .

[0056] like Figure 3 As shown, the two receiving ends of the front-end acquisition circuit 201 receive the collected voltage signal and calculate the relative voltage difference; the amplifier circuit 202 amplifies the voltage difference by 10-20 times, preferably 15 times; wherein, the front-end acquisition circuit 201 and the amplifier circuit 202 can use a 4-channel integrated operational amplifier to achieve high-precision acquisition of the voltage signal through the configuration of resistors and capacitors.

[0057] In addition, the filter circuit 203 is composed of two second-order SK low-pass filters connected in series, which can perform low-pass filtering on the amplified voltage difference signal to obtain a corresponding voltage signal. The accuracy of its detection voltage is 0.1mV, which can then be transmitted to the microcontroller chip 101 so that the microcontroller chip 101 can convert the detected voltage to update the originally stored voltage-concentration relationship value.

[0058] The standard solution module 300 is used to drive calibration solutions of various concentrations according to a preset parallel calibration structure, and to deliver the calibration solution of each concentration to a preset ion detection module based on analog signals and digital signals.

[0059] Secondly, the embodiment of the present application can also drive calibration solutions of various concentrations according to the parallel calibration structure through the standard solution module 300, and transport the calibration solutions of different concentrations to the ion detection module based on analog signals and digital signals to perform corresponding ion detection operations.

[0060] Optionally, in one embodiment of the present application, the standard solution module 300 includes: a calibration solution 301 , a peristaltic pump 302 and a calibration gate valve 303 .

[0061] Among them, calibration solution 301.

[0062] The peristaltic pump 302 is used to receive the analog signal and deliver the standard solution of corresponding concentration according to the analog signal.

[0063] The calibration gate valve 303 is used to receive a digital signal and control the opening and closing of a corresponding water channel according to the digital signal.

[0064] like Figure 4As shown, in a specific implementation process, the embodiment of the present application can construct a standard solution module 300 through a calibration solution 301 , a peristaltic pump 302 and a calibration gate valve 303 .

[0065] Due to the requirements of gradient calibration, the self-calibration device 10 for detecting ion concentration in water according to the embodiment of the present application requires 2-5 (preferably 3) standard solution modules 300 containing different concentrations to complete a calibration. The modules have the same structure and are in parallel with each other. Only the concentration of the calibration solution 301 is different. The reference minimum value of the three calibration solution concentrations is 0.5-2 mmol / L, preferably 0.5 mmol / L; the concentration gradient is 1-2 mmol / L, preferably 1 mmol / L.

[0066] The peristaltic pump 302 can receive the analog signal of the control circuit and deliver a standard solution with a concentration of 0.5 mmol / L to achieve accurate delivery of the micro-flow calibration solution 301. The transport flow range of the peristaltic pump 302 is 0.008-1710 mL / min, preferably 100 ml / min.

[0067] In addition, in an embodiment of the present application, the peristaltic pump 302 is connected to the calibration gate valve 303 through a hose, which receives the analog signal emitted by the single-chip microcomputer chip 101 to transport the calibration solution 301, and the calibration gate valve 303 receives the digital signal output by the MOS tube circuit 103 to control the on-off of the water channel; as a feasible method, after the calibration gate valve 303 receives the digital signal of the control circuit, the calibration gate valve 303 is opened at the beginning of transportation, and 10-30 ml of 0.5 mmol / L concentration calibration solution is transported at a time, preferably 20 ml; after the transportation is completed, the calibration gate valve 303 is closed; then, the parallel structure performs the above operations to transport 1.5 mmol / L and 2.5 mmol / L calibration solutions respectively.

[0068] The ion detection module 400 is used to form an open circuit voltage between the working electrode and the reference electrode when the calibration solution of each concentration contacts the preset working electrode and reference electrode, so as to determine the ion concentration value corresponding to the open circuit voltage based on the voltage-concentration relationship value.

[0069] Afterwards, the embodiment of the present application can form an open circuit voltage between the working electrode and the reference electrode when the calibration solution of each concentration contacts the working electrode and the reference electrode through the ion detection module 400, thereby determining the corresponding ion concentration value based on the open circuit voltage.

[0070] Optionally, in one embodiment of the present application, the ion detection module 400 includes: a calibration solution chamber, a working electrode, a reference electrode, and an electrode fixing plate.

[0071] The calibration solution chamber 401 is used to receive calibration solutions of various concentrations.

[0072] The working electrode 402 and the reference electrode 403 are used to generate an open circuit voltage when in contact with the calibration solution of each concentration, and the relationship between the open circuit voltage and the concentration of the ion to be measured conforms to the preset Nernst equation.

[0073] The electrode fixing piece 404 is used for mechanical fixation with the calibration solution chamber 401 .

[0074] It should be noted that if Figure 5 As shown, the ion detection module 400 is composed of a calibration solution chamber 401 , a working electrode 402 , a reference electrode 403 and an electrode fixing piece 404 .

[0075] Specifically, when three calibration solutions 301 of different concentrations are transported into the calibration solution chamber 401 and contact the working electrode 402 and the reference electrode 403, an open circuit voltage (i.e., a detection voltage) is formed between the working electrode 402 and the reference electrode 403; the relationship between the electrical signal collected by the working electrode 402 and the reference electrode 403 in the embodiment of the present application and the concentration of the ion to be measured conforms to the Nernst equation; the working electrode 402 and the reference electrode 403 should be horizontally spaced 1-3 mm apart, preferably 2 mm; the working electrode 402 and the reference electrode 403 are adhered to the surface of the electrode fixing plate 404 with solid glue; the electrode fixing plate 404 is mechanically fixed to the calibration solution chamber 401 as a whole.

[0076] Optionally, in one embodiment of the present application, the self-calibration device 10 for detecting ion concentration in water according to the embodiment of the present application further includes: a recovery module 500 , a deionized water storage module 600 and a wastewater discharge module 700 .

[0077] Among them, the recovery module 500 is used to receive an analog signal through a preset recovery peristaltic pump 503 to transport the calibrated calibration solution after the calibration of any calibration solution among multiple concentrations is completed, and when the preset recovery gate valve 501 receives a digital signal, the calibrated calibration solution is transported to the preset recovery solution chamber 502.

[0078] The deionized water storage module 600 is used to store a target volume of deionized water in a preset deionized water chamber 602 and deliver the deionized water to the calibration solution chamber in the ion detection module through a preset water pump 601 to dilute residual droplets of the calibration solution.

[0079] The wastewater discharge module 700 is used to allow the residual droplets of the diluted calibration solution to flow out along the preset delivery channel after the preset wastewater gate valve 701 receives the digital signal, and to blow out the residual droplets of the diluted calibration solution through the preset micro air pump 702.

[0080] In addition, the embodiment of the present application further includes a recovery module 500 , a deionized water storage module 600 and a wastewater discharge module 700 .

[0081] Among them, such as Figure 6 As shown, the recovery module 500 consists of a recovery gate valve 501, a recovery solution chamber 502, and a recovery peristaltic pump 503. When the calibration solution is calibrated, the recovery peristaltic pump 503 can be used to accurately transport the micro-flow calibration solution 301. The peristaltic pump 302 has a transport flow range of 0.008-1710 mL / min, preferably 100 ml / min. The recovery peristaltic pump 503 receives an analog signal output by the microcontroller chip 101 and begins transporting the calibrated solution. The recovery gate valve receives a digital signal from the MOS tube circuit 103, opening the transport channel to allow the calibrated solution to pass through. The calibrated solution is transported to the recovery solution chamber, awaiting subsequent chemical treatment.

[0082] like Figure 7 As shown, the deionized water storage module 600 consists of a water pump 601 and a deionized water chamber 602. The deionized water chamber 602 is filled with 200-300 mL of deionized water, preferably 250 mL. Deionized water can be obtained through ion exchange and reverse osmosis to meet the standards for diluting waste calibration solutions. The water pump 601 and the deionized water chamber 602 are connected by a hose. After the ion detection module 400 completes calibration, the water pump 601 receives the analog signal output by the single-chip microcomputer chip 101, which is used to quickly drive the deionized water in the pipeline. The deionized water is then transported to the calibration solution chamber 401 to dilute the remaining calibration solution droplets, waiting for the waste water to be discharged.

[0083] like Figure 8 As shown, the wastewater discharge module 700 consists of a wastewater gate valve 701, a micro air pump 702, and a wastewater chamber 703. The wastewater chamber 703 is mechanically assembled below the calibration solution chamber. Upon receiving a digital signal from the MOS transistor circuit 103, the wastewater gate valve 701 opens a delivery channel, allowing the diluted waste solution to flow out along the delivery channel under the action of gravity. The micro air pump 702 blows out any wastewater droplets remaining in the ion detection module 400, keeping the calibration solution chamber 401 clean and free of contamination.

[0084] In summary, the embodiment of the present application utilizes a control circuit module 100, a detection circuit module 200, a standard solution module 300, an ion detection module 400, a recovery module 500, a deionized water storage module 600, and a wastewater discharge module 700 to construct a corresponding self-calibration device 10 for detecting ion concentration in water. The detection circuit module 200 and the control circuit module 100 in the self-calibration device 10 for detecting ion concentration in water are connected by a flexible flat cable, while the standard solution module 300, the recovery module 500, the deionized water storage module 600, the wastewater discharge module 700, and the ion detection module 400 are connected by a flexible hose. Thus, the embodiment of the present application enables fully automatic calibration and recycling of calibration solutions, eliminating the need for manual replacement of calibration solutions of different concentrations. The standard solution consumption for a single calibration is no more than 60 ml, improving the environmental friendliness of the calibration process. Furthermore, the overall system design of the present application is compact, and three solutions with different concentration gradients are selected for calibration. The measurement accuracy after calibration reaches 0.01 mmol / L.

[0085] It can be understood that the embodiment of the present application is composed of multiple modules such as sensors, signal processing, calibration control, data storage and transmission, etc., and has the function of realizing self-calibration of ion detection. It can realize accurate measurement of ions by detecting and calibrating the potential data corresponding to the ion concentration in the standard solution, filling the gap in the research of portable ion detection self-calibration devices, and its structure is simple and the cost is low, and it is expected to be widely used in batches.

[0086] According to the embodiment of the present application, a self-calibration device for detecting ion concentration in water is proposed, which includes a control circuit module for outputting corresponding analog signals and digital signals through a preset single-chip microcomputer chip and MOS tube circuit; a detection circuit module for collecting voltage signals corresponding to the water sample to be detected through two receiving ends in a preset front-end acquisition circuit, and calculating the relative voltage difference corresponding to the two receiving ends, and amplifying and filtering the relative voltage difference to obtain a voltage signal that meets the preset stability requirements, and determining the voltage-concentration relationship value based on the voltage signal; a standard solution module for driving calibration solutions of multiple concentrations according to a preset parallel calibration structure, and based on the analog signal and the digital signal, delivering the calibration solution of each concentration to the preset ion detection module; an ion detection module for forming an open circuit voltage between the working electrode and the reference electrode when the calibration solution of each concentration contacts the preset working electrode and reference electrode, so as to determine the ion concentration value corresponding to the open circuit voltage based on the voltage-concentration relationship value. The present application has a simple structure and low cost, fills the gap in the research of portable ion detection self-calibration devices, and is expected to achieve widespread batch application.

[0087] Next, a self-calibration method for detecting ion concentration in water proposed in an embodiment of the present application is described with reference to the accompanying drawings.

[0088] Figure 9 This is a flow chart of a self-calibration method for detecting ion concentration in water provided in an embodiment of the present application.

[0089] like Figure 9 As shown, the self-calibration method for detecting ion concentration in water includes the following steps:

[0090] In step S901, corresponding analog signals and digital signals are generated by a preset single-chip microcomputer chip and MOS tube circuit.

[0091] In step S902, the voltage signal corresponding to the water sample to be detected is collected by the two receiving ends in the preset front-end acquisition circuit, and the relative voltage difference corresponding to the two receiving ends is calculated, and the relative voltage difference is amplified and filtered to obtain a voltage signal that meets the preset stability requirements, and the voltage-concentration relationship value is determined based on the voltage signal.

[0092] In step S903, calibration solutions of various concentrations are driven according to a preset parallel calibration structure, and based on analog signals and digital signals, the calibration solutions of each concentration are delivered to a preset ion detection module, so that when the calibration solutions of each concentration come into contact with the preset working electrode and reference electrode, an open circuit voltage is generated between the working electrode and the reference electrode, and based on the voltage-concentration relationship value, the ion concentration value corresponding to the open circuit voltage is determined.

[0093] It should be noted that the aforementioned explanation of the embodiment of the self-calibration device for detecting ion concentration in water is also applicable to the self-calibration method for detecting ion concentration in water in this embodiment, and will not be repeated here.

[0094] According to the self-calibration method for detecting ion concentration in water proposed in the embodiment of the present application, corresponding analog signals and digital signals are generated by a preset single-chip microcomputer chip and MOS tube circuit; the voltage signal corresponding to the water sample to be detected is collected by two receiving ends in a preset front-end acquisition circuit, and the relative voltage difference corresponding to the two receiving ends is calculated, and the relative voltage difference is amplified and filtered to obtain a voltage signal that meets the preset stability requirements, and the voltage-concentration relationship value is determined based on the voltage signal; calibration solutions of multiple concentrations are driven according to a preset parallel calibration structure, and based on the analog signal and the digital signal, the calibration solution of each concentration is delivered to the preset ion detection module, so that when the calibration solution of each concentration contacts the preset working electrode and reference electrode, an open circuit voltage is generated between the working electrode and the reference electrode, and based on the voltage-concentration relationship value, the ion concentration value corresponding to the open circuit voltage is determined. The present application has a simple structure and low cost, fills the gap in the research of portable ion detection self-calibration devices, and is expected to be widely used in batches.

[0095] Figure 10This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0096] A memory 1001 , a processor 1002 , and a computer program stored in the memory 1001 and executable on the processor 1002 .

[0097] When the processor 1002 executes the program, the self-calibration method for detecting ion concentration in water provided in the above embodiment is implemented.

[0098] Furthermore, the electronic device further includes:

[0099] The communication interface 1003 is used for communication between the memory 1001 and the processor 1002 .

[0100] The memory 1001 is used to store computer programs that can be run on the processor 1002 .

[0101] The memory 1001 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0102] If the memory 1001, processor 1002, and communication interface 1003 are implemented independently, the communication interface 1003, memory 1001, and processor 1002 can be connected to each other via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 10 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0103] Optionally, in a specific implementation, if the memory 1001, the processor 1002 and the communication interface 1003 are integrated on a chip, the memory 1001, the processor 1002 and the communication interface 1003 can communicate with each other through an internal interface.

[0104] The processor 1002 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0105] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned self-calibration method for detecting ion concentration in water.

[0106] An embodiment of the present application further provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned self-calibration method for detecting ion concentration in water.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0108] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0109] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing a custom logical function or process step, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed in a different order than shown or discussed, including performing functions in a substantially simultaneous manner or in a reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0110] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or N wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program can be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing it in other suitable ways as necessary, and then storing it in a computer memory.

[0111] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0112] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0113] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0114] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A self-calibration device for detecting ion concentration in water, characterized in that: include: The control circuit module is used to output corresponding analog signals and digital signals through the preset single-chip microcomputer chip and MOS tube circuit; A detection circuit module is used to collect voltage signals corresponding to the water sample to be detected through two receiving ends in a preset front-end acquisition circuit, calculate the relative voltage difference corresponding to the two receiving ends, amplify and filter the relative voltage difference to obtain a voltage signal that meets preset stability requirements, and determine a voltage-concentration relationship value based on the voltage signal; at least one standard solution module, configured to drive calibration solutions of various concentrations according to a preset parallel calibration structure, and deliver the calibration solution of each concentration to a preset ion detection module based on the analog signal and the digital signal; The ion detection module is used to form an open circuit voltage between the working electrode and the reference electrode when the calibration solution of each concentration contacts the preset working electrode and reference electrode, so as to determine the ion concentration value corresponding to the open circuit voltage based on the voltage-concentration relationship value.

2. The self-calibration device for detecting ion concentration in water according to claim 1, characterized in that: Also includes: a recovery module, configured to, when calibration of any one of the plurality of calibration solutions is completed, receive the analog signal via a preset recovery peristaltic pump to deliver the calibrated calibration solution, and, when a preset recovery gate valve receives the digital signal, deliver the calibrated calibration solution to a preset recovery solution chamber; a deionized water storage module, configured to store a target volume of deionized water in a preset deionized water chamber, and deliver the deionized water to the calibration solution chamber in the ion detection module via a preset water pump to dilute residual droplets of the calibration solution; The wastewater discharge module is used to make the residual droplets of the diluted calibration solution flow out along the preset delivery channel after the preset wastewater gate valve receives the digital signal, and to blow out the residual droplets of the diluted calibration solution through a preset micro air pump.

3. The self-calibration device for detecting ion concentration in water according to claim 1, characterized in that: The detection circuit module includes: The front-end acquisition circuit is used to obtain the voltage signals corresponding to the two receiving ends, and calculate the corresponding relative voltage difference according to the voltage signals of the two receiving ends; an amplifier circuit, configured to amplify the relative voltage difference; The filtering circuit is used to perform low-pass filtering on the amplified relative voltage difference to obtain a voltage signal that meets the preset stability requirement, and transmit the voltage signal to a preset single-chip microcomputer chip.

4. The self-calibration device for detecting ion concentration in water according to claim 1, characterized in that: The standard solution module comprises: Calibration solutions; a peristaltic pump, configured to receive the analog signal and deliver a standard solution of corresponding concentration according to the analog signal; The calibrated gate valve is used to receive the digital signal and control the opening and closing of the corresponding water channel according to the digital signal.

5. The self-calibration device for detecting ion concentration in water according to claim 1, characterized in that: The ion detection module includes: a calibration solution chamber, for receiving the calibration solutions of the plurality of concentrations; The working electrode and the reference electrode are configured to generate the open circuit voltage when in contact with the calibration solution of each concentration, wherein the relationship between the open circuit voltage and the concentration of the ion to be measured conforms to a preset Nernst equation; The electrode fixing piece is used for mechanical fixation with the calibration solution chamber.

6. The self-calibration device for detecting ion concentration in water according to claim 1, characterized in that: The control circuit module includes: A single-chip microcomputer chip is used to control the timing logic of each circuit based on a pre-stored self-calibration system control program and calibration schedule to generate corresponding digital signals or analog signals, receive the open-circuit voltage output by the ion detection module, and convert the open-circuit voltage to update a preset voltage-concentration relationship value; A power management circuit, configured to convert the DC voltage input to the control circuit module to obtain a corresponding target DC voltage, and to power the single-chip microcomputer chip and the preset Bluetooth chip via the target DC voltage; MOS tube circuit, used to receive the digital signal output by the single chip microcomputer chip and use the digital signal to control the on and off of the gate valve; The Bluetooth chip is used to receive the calibration result of the single-chip microcomputer chip and transmit it wirelessly to the terminal.

7. A self-calibration method for detecting ion concentration in water, characterized in that: The following steps are involved: Generate corresponding analog and digital signals through the preset single-chip microcomputer chip and MOS tube circuit; The voltage signal corresponding to the water sample to be tested is collected by two receiving ends in a preset front-end acquisition circuit, and the relative voltage difference corresponding to the two receiving ends is calculated, and the relative voltage difference is amplified and filtered to obtain a voltage signal that meets the preset stability requirements, and the voltage-concentration relationship value is determined based on the voltage signal; Calibration solutions of various concentrations are driven according to a preset parallel calibration structure, and based on the analog signal and the digital signal, the calibration solution of each concentration is delivered to a preset ion detection module, so as to generate an open circuit voltage between the working electrode and the reference electrode when the calibration solution of each concentration contacts the preset working electrode and the reference electrode, and determine the ion concentration value corresponding to the open circuit voltage based on the voltage-concentration relationship value.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the self-calibration method for detecting ion concentration in water according to claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the self-calibration method for detecting ion concentration in water as claimed in claim 7 .

10. A computer program product comprising a computer program, characterized in that The computer program is executed to implement the self-calibration method for detecting ion concentration in water according to claim 7 .

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