A fixed ion concentration monitoring system

Abstract

The application discloses a fixed ion concentration monitoring system and relates to the technical field of water quality detection.The fixed ion concentration monitoring system comprises a control module and a detection module.The detection module comprises a monitoring liquid cylinder, a maintenance water pump, a maintenance liquid cylinder, a calibration water pump, a calibration liquid cylinder and a detection water pump, and a selective electrode is arranged in the monitoring liquid cylinder.In a maintenance state, the maintenance water pump draws maintenance liquid from the maintenance liquid cylinder and delivers the maintenance liquid into the monitoring liquid cylinder.In a detection state, the detection water pump draws water to be detected from the monitoring liquid cylinder, and the selective electrode generates a detection voltage signal corresponding to the ion concentration in the water to be detected.In a calibration state, the calibration water pump draws calibration liquid from the calibration liquid cylinder and delivers the calibration liquid into the monitoring liquid cylinder, and the selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration liquid.The application realizes full-automatic maintenance, calibration and detection, and can be applied to the industrial use of the selective electrode.

Description

Technical Field

[0001] This application relates to the field of water quality testing technology, and in particular to a fixed ion concentration monitoring system. Background Technology

[0002] Selective electrodes are a widely used and routine detection technique for measuring ion concentration in water. However, due to their technical principles, selective electrodes require careful maintenance to ensure they are always in good condition. Furthermore, over time, the relationship between the reaction voltage and ion concentration of various selective electrodes will shift, necessitating recalibration after a period of use to establish the new voltage-ion concentration correspondence.

[0003] Currently, the maintenance and calibration of selective electrodes are all done manually, which makes it impossible for selective electrodes to be used stably in industrial environments for a long time. Summary of the Invention

[0004] This application provides a fixed ion concentration monitoring system to solve the problem that the maintenance and calibration of selective electrodes in the prior art both require manual processing.

[0005] This application provides a fixed ion concentration monitoring system, including:

[0006] Control module;

[0007] The detection module includes a monitoring liquid cylinder, a maintenance water pump, a calibration water pump, a calibration liquid cylinder, and a detection water pump. A selective electrode is installed in the monitoring liquid cylinder. The maintenance liquid cylinder and the calibration liquid cylinder are used to hold maintenance liquid and calibration liquid, respectively. The maintenance liquid cylinder is connected to the monitoring liquid cylinder through the maintenance water pump. The calibration liquid cylinder is connected to the monitoring liquid cylinder through the calibration water pump. The outlet of the detection water pump is connected to the monitoring liquid cylinder, and the inlet is connected to the water source to be tested. The maintenance water pump, the calibration water pump, and the selective electrode are all connected to the control module through control cables.

[0008] In maintenance mode, the maintenance water pump draws maintenance fluid from the maintenance fluid tank and delivers it to the monitoring fluid tank, immersing the selective electrode in the maintenance fluid. In detection mode, after the monitoring fluid tank discharges the maintenance fluid, the detection water pump draws the water to be tested into the monitoring fluid tank, and the selective electrode generates a detection voltage signal corresponding to the ion concentration in the water to be tested. In calibration mode, after the monitoring fluid tank discharges the maintenance fluid, the calibration water pump draws calibration fluid from the calibration fluid tank and delivers it to the monitoring fluid tank, and the selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration fluid.

[0009] In one possible implementation, the detection module further includes a control circuit and a signal amplification circuit. The control circuit is connected to the maintenance water pump, the calibration water pump, and the detection water pump, respectively, and the signal amplification circuit is connected to the selective electrode.

[0010] In one possible implementation, a cloud server is also included. The cloud server is connected to the control module. In the detection state, the cloud server calculates the ion concentration corresponding to the detection voltage signal based on the voltage-concentration correspondence. In the calibration state, the cloud server calibrates the voltage-concentration correspondence based on the concentration of the calibration solution and the calibration voltage signal.

[0011] In one possible implementation, the detection pump repeatedly draws water to be tested into the monitoring liquid cylinder during the detection state. After each draw, the selective electrode generates a detection voltage signal. The cloud server calculates the ion concentration corresponding to each detection voltage signal and takes the average of multiple ion concentrations as the result of this detection.

[0012] In one possible implementation, the detection module also includes a drainage pump, which is connected to the control module via a control cable.

[0013] In one possible implementation, the calibration liquid tank includes a first calibration liquid tank and a second calibration liquid tank, which are used to hold calibration liquids of different concentrations, respectively. The first calibration liquid tank is connected to the monitoring liquid tank via a first calibration water pump, and the second calibration liquid tank is connected to the monitoring liquid tank via a second calibration water pump. In calibration mode, after the monitoring liquid tank discharges the maintenance liquid, the first calibration water pump draws calibration liquid from the first calibration liquid tank and delivers it to the monitoring liquid tank. The selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration liquid. After the monitoring liquid tank discharges the calibration liquid, the maintenance water pump draws maintenance liquid from the maintenance liquid tank and delivers it to the monitoring liquid tank to clean the monitoring liquid tank and the selective electrode. After cleaning, the second calibration water pump draws calibration liquid from the second calibration liquid tank and delivers it to the monitoring liquid tank. The selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration liquid.

[0014] In one possible implementation, during calibration, a first calibration pump draws calibration fluid from a first calibration liquid cylinder and delivers it to a monitoring liquid cylinder to rinse the monitoring liquid cylinder and the selective electrode. After multiple rinsings, the first calibration pump draws calibration fluid into the monitoring liquid cylinder again, and the selective electrode generates a calibration voltage signal. After the monitoring liquid cylinder and the selective electrode are cleaned with maintenance fluid, a second calibration pump draws calibration fluid from a second calibration liquid cylinder and delivers it to the monitoring liquid cylinder to rinse the monitoring liquid cylinder and the selective electrode. After multiple rinsings, the second calibration pump draws calibration fluid into the monitoring liquid cylinder again, and the selective electrode generates a calibration voltage signal.

[0015] In one possible implementation, during the detection state, after the monitoring liquid cylinder discharges the maintenance fluid, the detection water pump draws the water to be tested into the monitoring liquid cylinder to rinse the monitoring liquid cylinder and the selective electrode. After multiple rinsings, the detection water pump draws the water to be tested into the monitoring liquid cylinder again, and the selective electrode generates a detection voltage signal corresponding to the ion concentration in the water to be tested.

[0016] In one possible implementation, after the water to be tested is tested is tested, the monitoring liquid tank discharges the water to be tested, and the maintenance water pump draws maintenance fluid from the maintenance liquid tank and delivers it to the monitoring liquid tank to rinse the monitoring liquid tank and the selective electrode. After multiple rinsings, the maintenance water pump draws maintenance fluid into the monitoring liquid tank again, so that the selective electrode is immersed in the maintenance fluid.

[0017] The fixed ion concentration monitoring system disclosed in this application has the following advantages:

[0018] It achieves fully automated maintenance, calibration, and testing, and can be applied to the industrial use of selective electrodes. The system can be installed near the water source being tested, providing continuous water quality testing and monitoring data in a fully automated manner. It simplifies the application process of water quality testing and monitoring, and provides a practical solution for use in special environments (such as underground coal mines), without requiring users to have professional electrochemical knowledge and electrochemical experimental operation capabilities. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of a fixed ion concentration monitoring system provided in an embodiment of this application.

[0021] Figure 2 This is a structural diagram of the detection module provided in the embodiments of this application. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Figure 1-2This is a schematic diagram of a fixed ion concentration monitoring system provided in an embodiment of this application. The embodiment of this application provides a fixed ion concentration monitoring system, including:

[0024] Control module;

[0025] The detection module includes a monitoring liquid cylinder, a maintenance water pump, a calibration water pump, a calibration liquid cylinder, and a detection water pump. A selective electrode is installed in the monitoring liquid cylinder. The maintenance liquid cylinder and the calibration liquid cylinder are used to hold maintenance liquid and calibration liquid, respectively. The maintenance liquid cylinder is connected to the monitoring liquid cylinder through the maintenance water pump. The calibration liquid cylinder is connected to the monitoring liquid cylinder through the calibration water pump. The outlet of the detection water pump is connected to the monitoring liquid cylinder, and the inlet is connected to the water source to be tested. The maintenance water pump, the calibration water pump, and the selective electrode are all connected to the control module through control cables.

[0026] In maintenance mode, the maintenance water pump draws maintenance fluid from the maintenance fluid tank and delivers it to the monitoring fluid tank, immersing the selective electrode in the maintenance fluid. In detection mode, after the monitoring fluid tank discharges the maintenance fluid, the detection water pump draws the water to be tested into the monitoring fluid tank, and the selective electrode generates a detection voltage signal corresponding to the ion concentration in the water to be tested. In calibration mode, after the monitoring fluid tank discharges the maintenance fluid, the calibration water pump draws calibration fluid from the calibration fluid tank and delivers it to the monitoring fluid tank, and the selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration fluid.

[0027] For example, the detection module also includes a control circuit and a signal amplification circuit. The control circuit is connected to the maintenance water pump, the calibration water pump and the detection water pump respectively, and the signal amplification circuit is connected to the selective electrode.

[0028] In the embodiments of this application, the control module pre-stores the detection and calibration time. When the set time is reached, the control module sends a control command to the control circuit. The control circuit responds to the control command to control the working status of each water pump. The signal amplification circuit is used to amplify and filter the weak voltage signal sent by the selective electrode, and finally sends a stable detection voltage signal or verification voltage signal to the control module.

[0029] Furthermore, multiple detection modules can be set according to the required detection locations, and the selective electrodes in each detection module can also be set according to the types of ions to be detected. For example, if calcium ions and magnesium ions need to be detected simultaneously, calcium ion electrodes and magnesium ion electrodes can be installed in the monitoring liquid cylinder at the same time, while if only calcium ions need to be detected, only calcium ion electrodes can be installed in the monitoring liquid cylinder.

[0030] The purpose of the maintenance fluid is to keep the selective electrode in good condition and reduce the deviation of test results caused by repeated use. The concentrations of various ions in the calibration fluid are known, and these ions cover the types of ions that the selective electrodes that may be installed in the monitoring fluid tank can detect, so that any selective electrode can be calibrated.

[0031] The water pump is connected to an inlet pipe. For water sources to be tested in the form of open channels, the inlet pipe can be directly inserted into the open channel. However, for water sources to be tested that are transported through pipelines, a T-junction needs to be installed on the pipeline and the inlet pipe needs to be connected to the T-junction.

[0032] Since the detection and calibration times have been preset, the control circuit can control the maintenance water pump to operate outside of the detection and calibration time, so that the monitoring cylinder and selective electrode are in maintenance mode.

[0033] Furthermore, the system of this application also includes a cloud server, which is communicatively connected to the control module. In the detection state, the cloud server calculates the ion concentration corresponding to the detection voltage signal based on the voltage-concentration correspondence. In the calibration state, the cloud server calibrates the voltage-concentration correspondence based on the concentration of the calibration solution and the calibration voltage signal.

[0034] Specifically, the control module can communicate with the cloud server via technologies such as WiFi, 4G, 5G, or fiber optics to send the voltage signal generated during each detection or calibration process to the cloud server. The voltage-concentration relationship described above can be represented by a logarithmic function; knowing either the voltage or the concentration allows the calculation of the other.

[0035] The voltage-concentration relationship can be expressed as: E = M + KlgC, where E represents voltage, M represents standard electrode voltage, K represents Nernst slope, and C represents concentration.

[0036] Furthermore, during the detection process, the water pump repeatedly draws water to be tested into the monitoring liquid cylinder. After each draw, the selective electrode generates a detection voltage signal. The cloud server calculates the ion concentration corresponding to each detection voltage signal and then takes the average value of multiple ion concentrations as the result of this detection.

[0037] During the testing and calibration process, repeated pumping and drainage operations are performed, and the cloud server calculates the average ion concentration obtained from multiple tests. This effectively eliminates fluctuations in the ion concentration of the water or calibration solution being tested, ensuring the accuracy of the final testing and calibration results.

[0038] In one possible embodiment, the detection module further includes a drainage pump, which is connected to the control module via a control cable.

[0039] For example, a drain outlet is provided at the bottom of the monitoring liquid cylinder. A drain pump is connected to this drain outlet via a drain pipe, while the maintenance water pump, calibration water pump, and test water pump are each connected to the side wall of the monitoring liquid cylinder via a water pipe. After each test or calibration, the control circuit will control the drain pump to operate, so as to drain the water to be tested or calibration fluid from the monitoring liquid cylinder, facilitating the input of maintenance fluid. Simultaneously, before the start of a test or calibration, the control circuit will also control the drain pump to operate, so as to drain the maintenance fluid from the monitoring liquid cylinder, facilitating the input of the water to be tested or calibration fluid.

[0040] In one possible embodiment, the calibration liquid tank includes a first calibration liquid tank and a second calibration liquid tank, which are used to hold calibration liquids of different concentrations, respectively. The first calibration liquid tank is connected to the monitoring liquid tank via a first calibration water pump, and the second calibration liquid tank is connected to the monitoring liquid tank via a second calibration water pump. In calibration mode, after the monitoring liquid tank discharges the maintenance liquid, the first calibration water pump draws calibration liquid from the first calibration liquid tank and delivers it to the monitoring liquid tank. The selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration liquid. After the monitoring liquid tank discharges the calibration liquid, the maintenance water pump draws maintenance liquid from the maintenance liquid tank and delivers it to the monitoring liquid tank to clean the monitoring liquid tank and the selective electrode. After cleaning, the second calibration water pump draws calibration liquid from the second calibration liquid tank and delivers it to the monitoring liquid tank. The selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration liquid.

[0041] For example, the concentrations of the same type of ions in the first calibration liquid cylinder and the second calibration liquid cylinder are different, and the types of ions in the two calibration liquid cylinders may be the same or different, but at least they must both contain the types of ions that can be detected by the installed selective electrodes.

[0042] As can be seen from the above expression for the voltage-concentration relationship, there are two constant terms, M and K, which may change. After a period of use, both constants will change to some extent. Therefore, by using the selective electrode to test the calibration solution in both calibration tanks, two equations will be generated, both of which contain the constant terms M and K. By solving these two equations together, the accurate constant terms under the current state can be obtained, thus achieving the purpose of calibration.

[0043] For example, if the ion concentrations C of the calibration solutions in the first and second calibration solution tanks are 10 PPM and 100 PPM respectively, the corresponding values ​​of lgC are 1 and 2. Assuming the calibration voltage signals generated by the selective electrode in the two calibration solutions are 10 mV and 100 mV respectively, substituting these two sets of values ​​into the voltage-concentration correspondence yields:

[0044] 10 = M + K

[0045] 100 = M + 2K

[0046] Solving the two equations simultaneously yields K = 90 and M = -80. Substituting these values ​​into the voltage-concentration correlation table, we can obtain the calibrated voltage-concentration correlation table.

[0047] E = -80 + 90lgC.

[0048] Furthermore, in the calibration state, the first calibration water pump draws calibration liquid from the first calibration liquid cylinder and delivers it to the monitoring liquid cylinder to rinse the monitoring liquid cylinder and the selective electrode. After multiple rinsings, the first calibration water pump draws calibration liquid into the monitoring liquid cylinder again, and the selective electrode generates a calibration voltage signal. After the monitoring liquid cylinder and the selective electrode are cleaned with maintenance fluid, the second calibration water pump draws calibration liquid from the second calibration liquid cylinder and delivers it to the monitoring liquid cylinder to rinse the monitoring liquid cylinder and the selective electrode. After multiple rinsings, the second calibration water pump draws calibration liquid into the monitoring liquid cylinder again, and the selective electrode generates a calibration voltage signal.

[0049] Multiple rinsing steps can effectively reduce the impact of the maintenance fluid on the calibration results, thereby improving the accuracy of the calibration results.

[0050] Furthermore, during the detection process, after the maintenance fluid is discharged from the monitoring liquid cylinder, the detection water pump draws water to be tested into the monitoring liquid cylinder to rinse the monitoring liquid cylinder and the selective electrode. After multiple rinsings, the detection water pump draws water to be tested into the monitoring liquid cylinder again, and the selective electrode generates a detection voltage signal corresponding to the ion concentration in the water to be tested. This multiple rinsing process can also reduce the influence of the maintenance fluid on the detection results and improve the accuracy of the detection results.

[0051] Furthermore, after the water to be tested is tested is completed, the monitoring liquid tank drains the water, and the maintenance water pump draws maintenance fluid from the maintenance liquid tank and delivers it to the monitoring liquid tank to rinse the monitoring liquid tank and the selective electrode. After multiple rinsings, the maintenance water pump draws maintenance fluid into the monitoring liquid tank again, immersing the selective electrode in the maintenance fluid. The maintenance fluid is a pre-prepared liquid with an appropriate ion concentration; therefore, multiple rinsings can reduce the impact of residual water to be tested in the monitoring liquid tank on the ion concentration in the maintenance fluid, improving the maintenance effect of the maintenance fluid.

[0052] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0053] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A fixed ion concentration monitoring system, characterized in that, include: Control module; The detection module includes a monitoring liquid cylinder, a maintenance water pump, a maintenance liquid cylinder, a calibration water pump, a calibration liquid cylinder, and a detection water pump. A selective electrode is installed in the monitoring liquid cylinder. The maintenance liquid cylinder and the calibration liquid cylinder are used to hold maintenance liquid and calibration liquid, respectively. The maintenance liquid cylinder is connected to the monitoring liquid cylinder via the maintenance water pump. The calibration liquid cylinder is connected to the monitoring liquid cylinder via the calibration water pump. The outlet of the detection water pump is connected to the monitoring liquid cylinder, and its inlet is connected to the water source to be tested. The maintenance water pump, the calibration water pump, and the selective electrode are all connected to the control module via control cables. The detection module further includes a control circuit and a signal amplification circuit. The control circuit is connected to the maintenance water pump, the calibration water pump and the detection water pump respectively, and the signal amplification circuit is connected to the selective electrode. A cloud server is communicatively connected to the control module. In the detection state, the cloud server calculates the ion concentration corresponding to the detection voltage signal based on the voltage-concentration correspondence. In calibration mode, the cloud server calibrates the voltage-concentration relationship based on the concentration of the calibration solution and the calibration voltage signal; the voltage-concentration relationship is expressed as E=M+KlgC, where E represents voltage, M represents standard electrode voltage, K represents Nernst slope, and C represents concentration. The calibration liquid tank includes a first calibration liquid tank and a second calibration liquid tank, which are used to hold calibration liquids of different concentrations. The first calibration liquid tank is connected to the monitoring liquid tank via a first calibration water pump, and the second calibration liquid tank is connected to the monitoring liquid tank via a second calibration water pump. In calibration mode, after the monitoring liquid tank discharges the maintenance liquid, the first calibration water pump draws the calibration liquid from the first calibration liquid tank and delivers it to the monitoring liquid tank. The selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration liquid. After the monitoring liquid tank discharges the calibration liquid, the maintenance water pump draws the maintenance liquid from the maintenance liquid tank and delivers it to the monitoring liquid tank to clean the monitoring liquid tank and the selective electrode. After cleaning, the second calibration water pump draws the calibration liquid from the second calibration liquid tank and delivers it to the monitoring liquid tank. The selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration liquid. In maintenance mode, the maintenance water pump draws maintenance fluid from the maintenance fluid tank and delivers it to the monitoring fluid tank, immersing the selective electrode in the maintenance fluid; In the detection state, after the monitoring liquid cylinder discharges the maintenance liquid, the detection water pump draws the water to be tested into the monitoring liquid cylinder, and the selective electrode generates a detection voltage signal corresponding to the ion concentration in the water to be tested; in the calibration state, after the monitoring liquid cylinder discharges the maintenance liquid, the calibration water pump draws the calibration liquid from the calibration liquid cylinder and delivers it to the monitoring liquid cylinder, and the selective electrode generates a calibration voltage signal corresponding to the ion concentration in the calibration liquid.

2. The fixed ion concentration monitoring system according to claim 1, characterized in that, During the detection state, the detection water pump repeatedly draws the water to be tested into the monitoring liquid cylinder. After each draw of the water to be tested, the selective electrode generates the detection voltage signal. The cloud server calculates the ion concentration corresponding to each detection voltage signal and takes the average value of multiple ion concentrations as the result of this detection.

3. The fixed ion concentration monitoring system according to claim 1, characterized in that, The detection module also includes a drainage pump, which is connected to the control module via the control cable.

4. The fixed ion concentration monitoring system according to claim 1, characterized in that, In calibration mode, the first calibration water pump draws calibration fluid from the first calibration fluid tank and delivers it to the monitoring fluid tank to rinse the monitoring fluid tank and the selective electrode. After multiple rinsings, the first calibration water pump draws calibration fluid into the monitoring fluid tank again, and the selective electrode generates the calibration voltage signal. After the monitoring fluid tank and the selective electrode are cleaned with the maintenance fluid, the second calibration water pump draws calibration fluid from the second calibration fluid tank and delivers it to the monitoring fluid tank to rinse the monitoring fluid tank and the selective electrode. After multiple rinsings, the second calibration water pump draws calibration fluid into the monitoring fluid tank again, and the selective electrode generates the calibration voltage signal.

5. A fixed ion concentration monitoring system according to claim 1, characterized in that, In the detection state, after the monitoring liquid cylinder discharges the maintenance fluid, the detection water pump draws water to be tested into the monitoring liquid cylinder to rinse the monitoring liquid cylinder and the selective electrode. After multiple rinsings, the detection water pump draws water to be tested into the monitoring liquid cylinder again, and the selective electrode generates the detection voltage signal corresponding to the ion concentration in the water to be tested.

6. A fixed ion concentration monitoring system according to claim 1, characterized in that, After the water to be tested is tested is tested, the monitoring liquid tank discharges the water to be tested. The maintenance water pump draws maintenance liquid from the maintenance liquid tank and delivers it to the monitoring liquid tank to rinse the monitoring liquid tank and the selective electrode. After rinsing multiple times, the maintenance water pump draws maintenance liquid into the monitoring liquid tank again to immerse the selective electrode in the maintenance liquid.

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