Online chemical instrument temperature compensation model modeling data automatic measurement system and method

Abstract

The invention discloses an on-line chemical instrument temperature compensation model modeling data automatic measurement system and method, an outlet of a demineralized water tank is communicated with a liquid inlet of a constant temperature tank through a first electromagnetic metering pump, and an outlet of a mother liquor storage tank is communicated with the liquid inlet of the constant temperature tank through a second electromagnetic metering pump and a first electromagnetic valve in sequence; a second electromagnetic valve is arranged at a liquid inlet of the constant-temperature tank body; a sampling port of the constant-temperature tank body is communicated with an on-line chemical instrument through a fourth electromagnetic valve and a sampling pump; a third electromagnetic valve is arranged at an outlet of the constant-temperature tank body; a semiconductor chilling plate is arranged in the constant-temperature tank body, an electric stirrer and a temperature sensor are arranged in the constant-temperature tank body, the system and the method can continuously obtain measurement data of a water sample of the online chemical instrument under the conditions of given temperature and given concentration, and construction efficiency and accuracy of a temperature compensation model of the online chemical instrument are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic detection, and relates to an automatic measurement system and method for modeling data of an online chemical instrument temperature compensation model. Background Art

[0002] The water sample temperature has a great influence on the measurement results of online chemical instruments: for online pH meters, online sodium meters, online chlorine meters and other instruments based on ion selective electrodes, temperature changes can cause changes in the reference electrode potential, Nernst slope and solution equilibrium constant, thereby causing instrument measurement errors; for online (hydrogen) conductivity meters, temperature can directly affect the ionization degree, solubility, ion migration rate, etc. of electrolytes in water samples, thereby affecting the conductivity of the solution; for hardness analyzers, temperature can affect the EDTA and Ca 2+ Mg 2+ reaction, resulting in the phenomenon that the measurement results gradually decrease with increasing temperature.

[0003] In order to alleviate or even eliminate the impact of temperature, most manufacturers choose to use self-built temperature compensation models to correct the measurement results. An accurate temperature compensation model requires a large amount of effective modeling data. To this end, the staff needs to repeatedly configure simulated water samples of various concentrations, heat / cool them to different temperatures, and then use the instrument to measure. The above process is very cumbersome and will consume a lot of time and energy. In addition, the measurement results will be affected by personal operating behavior, subjective judgment and other factors, which is not conducive to the efficient and accurate construction of the temperature compensation model. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an automatic measurement system and method for modeling data of an online chemical instrument temperature compensation model. The system and method can continuously obtain measurement data of water samples of online chemical instruments under given temperature and given concentration conditions, thereby improving the construction efficiency and accuracy of the online chemical instrument temperature compensation model.

[0005] To achieve the above object, the present invention discloses an automatic measurement system for modeling data of an online chemical instrument temperature compensation model, comprising a desalted water tank, a mother liquid storage tank, a first electromagnetic metering pump, a second electromagnetic metering pump, a first electromagnetic valve, a second electromagnetic valve, an electric stirrer, a temperature sensor, a semiconductor refrigeration sheet, a constant temperature tank, a third electromagnetic valve, a fourth electromagnetic valve, a sampling pump and an online chemical instrument;

[0006] The outlet of the desalted water tank is connected to the liquid inlet of the thermostatic tank through the first electromagnetic metering pump, and the outlet of the mother liquid storage tank is connected to the liquid inlet of the thermostatic tank through the second electromagnetic metering pump and the first electromagnetic valve in turn, and the second electromagnetic valve is provided at the liquid inlet of the thermostatic tank;

[0007] The sampling port of the thermostatic tank is connected to the online chemical instrument through a fourth solenoid valve and a sampling pump, and a third solenoid valve is provided at the outlet of the thermostatic tank;

[0008] The constant temperature tank body is provided with a semiconductor refrigeration sheet, and the constant temperature tank body is provided with an electric stirrer and a temperature sensor.

[0009] The further improvement of the automatic measurement system for modeling data of online chemical instrument temperature compensation model of the present invention is:

[0010] Furthermore, it also includes a control system, which is connected to the first electromagnetic metering pump, the second electromagnetic metering pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the electric agitator, the temperature sensor, the semiconductor refrigeration sheet, the sampling pump and the online chemical instrument.

[0011] Furthermore, semiconductor refrigeration sheets are arranged around the constant temperature tank.

[0012] Furthermore, the electric stirrer, the temperature sensor, the semiconductor refrigeration sheet and the constant temperature tank constitute a water sample constant temperature device.

[0013] The present invention discloses an automatic measurement method for modeling data of an online chemical instrument temperature compensation model, comprising the following steps:

[0014] 1) Open the first solenoid valve and the second solenoid valve, close the third solenoid valve, start and adjust the opening of the first solenoid metering pump and the second solenoid metering pump based on the set simulated water sample concentration, and pump the deionized water and the mother liquor into the constant temperature tank in equal proportions;

[0015] 2) Close the first solenoid valve and the second solenoid valve, close the first solenoid metering pump and the second solenoid metering pump, start the electric stirrer and the semiconductor refrigeration sheet, and heat / cool the simulated water sample to the target temperature;

[0016] 3) Open the fourth solenoid valve and the sample pump to continuously pump the constant temperature simulated water sample into the online chemical instrument for measurement, and transmit the measurement results to the control system.

[0017] The further improvement of the automatic measurement method of modeling data of the online chemical instrument temperature compensation model of the present invention is:

[0018] Furthermore, before step 1), the following steps are also included:

[0019] The simulated water sample concentration, measurement temperature range and temperature interval are set through the control system;

[0020] Open the second solenoid valve and the third solenoid valve, close the first solenoid valve and the fourth solenoid valve, start the first solenoid metering pump, and continuously pump desalted water into the constant temperature tank body to flush the constant temperature tank body.

[0021] Furthermore, when the difference between the measured temperature of the temperature sensor and the target temperature does not exceed ±0.2°C and is maintained for more than 5 minutes, it is considered that the simulated water sample has been heated / cooled to the target temperature.

[0022] Furthermore, step 3) further includes:

[0023] Turn off the sample pump, electric stirrer and semiconductor cooling chip;

[0024] Open the third solenoid valve to drain the residual liquid in the constant temperature tank, then close the third solenoid valve, and simultaneously open the second solenoid valve, the first solenoid metering pump and the sampling pump to flush the constant temperature simulated water sample pipeline and the online chemical instrument;

[0025] Close the fourth solenoid valve and the sample injection pump, open the third solenoid valve, and flush the thermostatic tank;

[0026] Close the third solenoid valve and the first solenoid metering pump.

[0027] Furthermore, semiconductor refrigeration sheets are arranged around the constant temperature tank.

[0028] Furthermore, the electric stirrer, the temperature sensor, the semiconductor refrigeration sheet and the constant temperature tank constitute a water sample constant temperature device.

[0029] The present invention has the following beneficial effects:

[0030] The online chemical instrument temperature compensation model modeling data automatic measurement system and method described in the present invention can automatically configure simulated water samples of corresponding concentrations according to set water sample parameters during specific operations, and complete constant temperature heating of simulated water samples, online chemical instrument measurement and measurement data recording, thereby reducing repetitive work of relevant personnel, avoiding measurement errors caused by human factors, and improving the modeling efficiency and accuracy of the online chemical instrument temperature compensation model. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural diagram of the present invention.

[0033] Among them, 1 is a desalted water tank, 2 is a mother liquid storage tank, 3 is a first electromagnetic metering pump, 4 is a second electromagnetic metering pump, 5 is a first electromagnetic valve, 6 is a second electromagnetic valve, 7 is an electric stirrer, 8 is a temperature sensor, 9 is a semiconductor refrigeration plate, 10 is a constant temperature tank, 11 is a third electromagnetic valve, 12 is a fourth electromagnetic valve, 13 is a sample pump, 14 is an online chemical instrument, and 15 is a control system. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0037] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0038] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0039] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0042] Embodiment 1

[0043] refer to Figure 1 The online chemical instrument temperature compensation model modeling data automatic measurement system of the present invention comprises a deionized water tank 1, a mother liquid storage tank 2, a first electromagnetic metering pump 3, a second electromagnetic metering pump 4, a first electromagnetic valve 5, a second electromagnetic valve 6, an electric stirrer 7, a temperature sensor 8, a semiconductor refrigeration sheet 9, a constant temperature tank 10, a third electromagnetic valve 11, a fourth electromagnetic valve 12, a sampling pump 13, an online chemical instrument 14 and a control system 15;

[0044] The outlet of the desalted water tank 1 is connected to the liquid inlet of the thermostatic tank body 10 via the first electromagnetic metering pump 3, and the outlet of the mother liquid storage tank 2 is connected to the liquid inlet of the thermostatic tank body 10 via the second electromagnetic metering pump 4 and the first electromagnetic valve 5 in turn. A second electromagnetic valve 6 is provided at the liquid inlet of the thermostatic tank body 10.

[0045] The sampling port of the thermostatic tank 10 is connected to an online chemical instrument 14 via a fourth solenoid valve 12 and a sampling pump 13 , and a third solenoid valve 11 is provided at the outlet of the thermostatic tank 10 .

[0046] A semiconductor refrigeration sheet 9 is arranged in the constant temperature tank body 10 , and an electric stirrer 7 and a temperature sensor 8 are arranged in the constant temperature tank body 10 .

[0047] The control system 15 is connected to the first electromagnetic metering pump 3 , the second electromagnetic metering pump 4 , the first electromagnetic valve 5 , the second electromagnetic valve 6 , the third electromagnetic valve 11 , the fourth electromagnetic valve 12 , the electric stirrer 7 , the temperature sensor 8 , the semiconductor refrigeration sheet 9 , the sampling pump 13 and the online chemical instrument 14 .

[0048] As an embodiment of the present invention, the constant temperature tank body 10 is an aluminum cubic container with good thermal conductivity. An electric stirrer 7 and a temperature sensor 8 are inserted on the top of the constant temperature tank body 10. The electric stirrer 7 is used to mix liquid and accelerate heat transfer. The temperature sensor 8 is used to measure the temperature of the water sample in the constant temperature tank body 10. Semiconductor refrigeration sheets 9 are arranged around the constant temperature tank body 10, which can complete cooling or heating functions according to the set conditions.

[0049] As an embodiment of the present invention, the electric stirrer 7, the temperature sensor 8, the semiconductor refrigeration sheet 9 and the constant temperature tank 10 constitute a water sample constant temperature device.

[0050] Embodiment 2

[0051] The method for automatically measuring modeling data of an online chemical instrument temperature compensation model of the present invention comprises the following steps:

[0052] 1) The operator sets the concentration of a single simulated water sample, the measurement temperature range and the temperature interval through the control system 15;

[0053] 2) Open the second solenoid valve 6 and the third solenoid valve 11, close the first solenoid valve 5 and the fourth solenoid valve 12, start the first solenoid metering pump 3, and continuously pump deionized water into the constant temperature tank 10 to flush it, and then enter the measurement process;

[0054] 3) Open the first solenoid valve 5 and close the third solenoid valve 11, start and adjust the opening of the first solenoid metering pump 3 and the second solenoid metering pump 4 based on the set simulated water sample concentration, and pump the deionized water and the mother liquor into the constant temperature tank 10 in equal proportions;

[0055] 4) Close the first solenoid valve 5 and the second solenoid valve 6, close the first solenoid metering pump 3 and the second solenoid metering pump 4, start the electric stirrer 7 and the semiconductor refrigeration sheet 9, and heat / cool the simulated water sample to the target temperature;

[0056] Furthermore, the initial target temperature of the constant temperature simulated water sample is the lower limit temperature of the set temperature range;

[0057] Furthermore, when the difference between the measured temperature of the temperature sensor 8 and the target temperature does not exceed ±0.2°C and is maintained for more than 5 minutes, it is considered that the simulated water sample has been heated / cooled to the target temperature and the next step is entered;

[0058] 5) Open the fourth solenoid valve 12 and the sample pump 13 to continuously pump the constant temperature simulated water sample into the online chemical instrument 14 for measurement, and transmit the measurement results to the control system 15;

[0059] Furthermore, the online chemical instrument 14 has concentration measurement and temperature measurement functions;

[0060] Further, after the measurement result of the online chemical instrument 14 is stable, the control system 15 records the concentration and temperature of the water sample measured by the online chemical instrument 14 and performs the measurement of the next target temperature;

[0061] Further, the next target temperature is the sum of the current target temperature and the temperature interval;

[0062] 6) Close the fourth solenoid valve 12 and the sample pump 13, adjust the semiconductor cooling plate 9, and heat the simulated water sample to the next target temperature;

[0063] 7) Repeat step 5) and step 6) until the current target temperature is the upper limit temperature of the set temperature range, and after completing the measurement of the target temperature constant temperature simulated water sample, turn off the sample pump 13, the electric stirrer 7 and the semiconductor cooling sheet 9;

[0064] 8) Open the third solenoid valve 11 to drain the residual liquid in the constant temperature tank 10, then close the third solenoid valve 11, and simultaneously open the second solenoid valve 6, the first solenoid metering pump 3 and the sampling pump 13 to flush the constant temperature simulated water sample pipeline and the online chemical instrument 14;

[0065] 9) Close the fourth solenoid valve 12 and the sample injection pump 13, open the third solenoid valve 11, and flush the thermostatic tank 10;

[0066] 10) Close the third electromagnetic valve 11 and the first electromagnetic metering pump 3 to complete the automatic measurement of the temperature compensation model data.

[0067] Embodiment 3

[0068] Compared with the first embodiment, step 1) in this embodiment sets multiple simulated water sample concentrations;

[0069] Compared with the first embodiment, step 3) in this embodiment first starts and adjusts the opening of the first electromagnetic metering pump 3 and the second electromagnetic metering pump 4 based on the set minimum simulated water sample concentration, and pumps the deionized water and the mother liquor into the constant temperature tank 10 in equal proportions;

[0070] Compared with the first embodiment, after step 9) in this embodiment is completed, the process returns to step 3) to complete the data measurement of the next simulated water sample concentration until the simulated water sample concentration reaches the set maximum simulated water sample concentration.

[0071] Embodiment 4

[0072] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the automatic measurement method of the modeling data of the online chemical instrument temperature compensation model are implemented. The memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc. The processor, the network interface, and the memory are interconnected through an internal bus. The internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard structure bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include a program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0073] Embodiment 4

[0074] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the automatic measurement method of the online chemical instrument temperature compensation model modeling data are implemented. Specifically, the computer-readable storage medium includes, but is not limited to, for example, a volatile memory and / or a non-volatile memory. The volatile memory may include a random access memory (RAM) and / or a cache memory, etc. The non-volatile memory may include a read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.

[0075] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0076] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0077] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0078] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0079] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0080] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An automatic measurement system for modeling data of online chemical instrument temperature compensation model, characterized in that: It comprises a desalted water tank (1), a mother liquid storage tank (2), a first electromagnetic metering pump (3), a second electromagnetic metering pump (4), a first electromagnetic valve (5), a second electromagnetic valve (6), an electric stirrer (7), a temperature sensor (8), a semiconductor refrigeration sheet (9), a constant temperature tank (10), a third electromagnetic valve (11), a fourth electromagnetic valve (12), a sample injection pump (13) and an online chemical instrument (14); The outlet of the desalted water tank (1) is connected to the liquid inlet of the thermostatic tank (10) via a first electromagnetic metering pump (3), and the outlet of the mother liquid storage tank (2) is connected to the liquid inlet of the thermostatic tank (10) via a second electromagnetic metering pump (4) and a first electromagnetic valve (5) in sequence, and a second electromagnetic valve (6) is provided at the liquid inlet of the thermostatic tank (10); The sampling port of the thermostatic tank (10) is connected to an online chemical instrument (14) via a fourth electromagnetic valve (12) and a sampling pump (13), and a third electromagnetic valve (11) is provided at the outlet of the thermostatic tank (10); A semiconductor refrigeration sheet (9) is arranged in the constant temperature tank body (10), and an electric stirrer (7) and a temperature sensor (8) are arranged in the constant temperature tank body (10).

2. The automatic measurement system for online chemical instrument temperature compensation modeling data according to claim 1 is characterized in that: The invention also comprises a control system (15), wherein the control system (15) is connected to the first electromagnetic metering pump (3), the second electromagnetic metering pump (4), the first electromagnetic valve (5), the second electromagnetic valve (6), the third electromagnetic valve (11), the fourth electromagnetic valve (12), the electric stirrer (7), the temperature sensor (8), the semiconductor cooling sheet (9), the sample injection pump (13) and the online chemical instrument (14).

3. The automatic measurement system for online chemical instrument temperature compensation modeling data according to claim 1 is characterized in that: The semiconductor refrigeration sheets (9) are arranged around the constant temperature tank body (10).

4. The automatic measurement system for online chemical instrument temperature compensation modeling data according to claim 1 is characterized in that: The electric stirrer (7), the temperature sensor (8), the semiconductor refrigeration sheet (9) and the constant temperature tank (10) constitute a water sample constant temperature device.

5. An automatic measurement method for modeling data of an online chemical instrument temperature compensation model, characterized in that: The automatic measurement system for modeling data of the online chemical instrument temperature compensation model according to claim 2 comprises the following steps: 1) opening the first solenoid valve (5) and the second solenoid valve (6), closing the third solenoid valve (11), starting and adjusting the openings of the first solenoid metering pump (3) and the second solenoid metering pump (4) based on the set simulated water sample concentration, and pumping the deionized water and the mother liquor into the constant temperature tank (10) in equal proportions; 2) closing the first solenoid valve (5) and the second solenoid valve (6), closing the first solenoid metering pump (3) and the second solenoid metering pump (4), starting the electric stirrer (7) and the semiconductor refrigeration sheet (9), and heating / cooling the simulated water sample to the target temperature; 3) Open the fourth solenoid valve (12) and the sample injection pump (13), continuously pump the constant temperature simulated water sample into the online chemical instrument (14) for measurement, and transmit the measurement results to the control system (15).

6. The method for automatically measuring modeling data of an online chemical instrument temperature compensation model according to claim 5, characterized in that: Before step 1), it also includes: The simulated water sample concentration, the measurement temperature range and the temperature interval are set by the control system (15); The second solenoid valve (6) and the third solenoid valve (11) are opened, the first solenoid valve (5) and the fourth solenoid valve (12) are closed, and the first solenoid metering pump (3) is started to continuously pump deionized water into the constant temperature tank body (10) to flush the constant temperature tank body (10).

7. The method for automatically measuring modeling data of an online chemical instrument temperature compensation model according to claim 5, characterized in that: When the difference between the temperature measured by the temperature sensor (8) and the target temperature does not exceed ±0.2°C and is maintained for more than 5 minutes, it is considered that the simulated water sample has been heated / cooled to the target temperature.

8. The method for automatically measuring modeling data of an online chemical instrument temperature compensation model according to claim 5, characterized in that: Step 3) also includes: Turn off the sample injection pump (13), the electric stirrer (7) and the semiconductor cooling sheet (9); The third solenoid valve (11) is opened to drain the residual liquid in the constant temperature tank (10), and then the third solenoid valve (11) is closed, and the second solenoid valve (6), the first solenoid metering pump (3) and the sample injection pump (13) are opened at the same time to flush the constant temperature simulated water sample pipeline and the online chemical instrument (14); The fourth solenoid valve (12) and the sample injection pump (13) are closed, and the third solenoid valve (11) is opened to flush the thermostatic tank (10); The third electromagnetic valve (11) and the first electromagnetic metering pump (3) are closed.

9. The method for automatically measuring modeling data of an online chemical instrument temperature compensation model according to claim 5, characterized in that: The semiconductor refrigeration sheets (9) are arranged around the constant temperature tank body (10).

10. The method for automatically measuring modeling data of an online chemical instrument temperature compensation model according to claim 5, characterized in that: The electric stirrer (7), the temperature sensor (8), the semiconductor refrigeration sheet (9) and the constant temperature tank (10) constitute a water sample constant temperature device.

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