On-site online salt mist concentration measuring device

Abstract

The utility model relates to the technical field of environment monitoring, in particular to an on-site online salt mist concentration measuring device which comprises a detection pool, and an air bag is connected to a top port of the detection pool in a sealed and sleeved mode. A plurality of input ports of the detection pool are respectively connected with a pure water injection pipe for injecting pure water into the detection pool; the standard sample injection pipe is used for injecting a sample solution with standard salinity into the detection pool; the air inlet pipe is used for injecting salt mist air into the detection pool; the device further comprises a processor, the processor is electrically connected with a conductivity sensor located in the detection pool, and the processor measures the conductivity value of a solution in the detection pool through the conductivity sensor. The scheme is beneficial to simplifying the structure of the salt mist monitoring equipment, so that the working process of monitoring operation is more simplified, and the monitoring effect that the salt mist monitoring equipment is unattended on the sea for a long time is more easily realized.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental monitoring, and in particular to an on-site online salt spray concentration measuring device. Background Art

[0002] At present, the corrosion of seaside / ocean buildings and equipment is extremely serious, especially the aluminum alloy and iron materials of buildings. On a macro level, everyone knows that marine corrosion is the direct cause, but they do not know that seaside / ocean salt spray corrosion is the main cause, and an important part of salt spray corrosion is the electrochemical corrosion of chloride ions. Therefore, in the atmospheric environment monitoring of the seaside / ocean, the salt concentration monitoring of salt spray is particularly important, but as a monitoring method, it is currently at the stage of on-site sampling and laboratory analysis, and it is difficult to carry out long-term continuous automatic monitoring. In other words, the current atmospheric environment monitoring for the seaside / ocean generally requires on-site sampling, and then the gas samples are brought back to the laboratory for analysis, so it is difficult to carry out long-term continuous automatic monitoring.

[0003] In view of the above, the industry has proposed some online detection schemes for on-site air salt spray concentration. Although they are feasible in theory, their availability and reliability in actual operation are not high. For example, the Chinese invention patent with patent number CN110044830B discloses a device and detection method for online detection of atmospheric salt spray content. This technical solution requires complex mechanisms and operations such as reagent storage, air pump, transfer pump, sampling bottle, sampling needle, cuvette, conveyor belt, etc. The overall structure of the monitoring device is complex, and the working process of the monitoring operation is also relatively complex. In actual application, a large amount of manual operation is still required, and it is still difficult to achieve the long-term unmanned monitoring effect of salt spray monitoring equipment at the seaside. Summary of the invention

[0004] The present invention aims to overcome at least one defect (shortcoming) in the above-mentioned prior art and provide an on-site online salt spray concentration measuring device, which is beneficial to simplify the structure of the salt spray monitoring equipment, so as to simplify the working process of its monitoring operation and make it easier to realize the long-term unattended monitoring of the salt spray monitoring equipment at the seaside.

[0005] The present invention provides an on-site online salt spray concentration measuring device, comprising a detection pool, wherein the top port of the detection pool is sealed with an air bag;

[0006] The multiple input ports of the detection pool are respectively connected to:

[0007] Pure water injection tube, used to inject pure water into the detection pool;

[0008] A standard sample injection tube is used to inject a sample solution of standard salinity into the detection cell;

[0009] An air inlet pipe is used to inject salt spray air into the detection cell;

[0010] The device further comprises a processor, wherein the processor is electrically connected to a conductivity sensor located inside the detection cell, and the processor measures the conductivity value of the solution in the detection cell through the conductivity sensor.

[0011] In addition, the structure of this scheme also includes a jet pump, a water pump and a sprayer;

[0012] The water extraction pipe is located at the bottom of the inner cavity of the detection pool and is connected to the water extraction port of the jet pump. The sprayer is located at the top of the detection pool and its spraying direction is toward the inside of the airbag.

[0013] A liquid level detection sensor electrically connected to the processor is arranged in the detection tank, so that the processor can monitor the internal liquid level of the detection tank through the liquid level detection sensor.

[0014] The liquid level detection sensor is a contact or non-contact liquid level sensor.

[0015] In addition, it also includes a limit sensor electrically connected to the processor, and the limit sensor is located above the airbag, so that the processor can monitor the inflation status of the airbag through the limit sensor.

[0016] A temperature sensor electrically connected to the processor is disposed in the detection cell, so that the processor can monitor the internal solution temperature of the detection cell through the temperature sensor.

[0017] A drain valve controlled by the processor is arranged at the bottom of the detection pool.

[0018] The pure water injection pipe is provided with a water inlet valve controlled by the processor.

[0019] The water inlet of the standard sample injection tube is provided with a three-way valve controlled by the processor, and the three-way valve is connected in parallel with three injection tubes.

[0020] The air inlet pipe is provided with an air pump controlled by the processor.

[0021] In addition, the measured data are temperature corrected and calibrated periodically with standard brine samples.

[0022] An on-site online salt spray concentration measuring device of the present invention is provided with a detection pool for accommodating pure water or a salt-containing solution and an air bag for accommodating salt spray air. The multiple input ports of the detection pool are respectively connected to a pure water injection pipe and an air inlet pipe, so that the external pure water and salt spray air can enter the detection pool and the air bag. Since the air bag is sealed and sleeved on the top port of the detection pool, the salt spray air entering the detection pool can inflate the air bag and rise into the air bag. At the same time, the jet pump precipitates water from the ejector through a water pump and sprays it out in atomization, which is continuously circulated, so that the salt spray air in the air bag can repeatedly contact the pure water in the detection pool, thereby facilitating the salt spray particles in the salt spray air to fully dissolve in the pure water and form a salt-containing conductive solution in the detection pool. In addition, the measuring device of the present embodiment also includes a processor, and the processor measures the conductivity value of the solution in the detection pool through the conductivity sensor, so it can help to realize that the processor automatically detects the salt-containing solution in the detection pool and measures the conductivity value of the solution in the detection pool. In addition, the input port of the detection pool is also connected to A standard sample injection tube is provided. In actual use, one or more groups of sample solutions of standard salinity can be injected into the detection pool in advance through the standard sample injection tube, and the processor can measure the conductivity value of the standard salinity sample solution through the conductivity sensor. After temperature correction, the equation parameters are obtained or calculated in advance after regression calculation. When the conductive solution (the salt-containing conductive solution obtained after the salt fog particles in the salt fog air are dissolved in pure water) is subsequently measured, the pre-obtained calibration parameters can be used as a comparison basis to enable the processor to automatically determine the salt concentration of the salt fog air in the external environment according to the calibration parameters, or the relevant algorithm of the prior art can be written into the processor in advance, and the relevant calculation formula for calculating the salt concentration of the salt fog air is converted using the pre-obtained multiple groups of calibration parameters, so that the processor can automatically determine the concentration of the salt fog air in the external environment according to the calculation formula. Through the above method, it is easier to achieve the long-term unmanned monitoring effect of the salt fog monitoring equipment at the seaside, and the structure of the salt fog monitoring equipment can be significantly simplified, and the working process of the monitoring operation is more simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the present scheme or the technical scheme in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present scheme. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a brief schematic diagram of the overall structure of this scheme;

[0025] Figure 2 It is a brief schematic diagram of the local structure of this scheme.

[0026] Figure Annotation

[0027] 1. Detection pool, 2. Air bag, 3. Pure water injection tube, 4. Standard sample injection tube, 5. Air inlet pipe, 6. Processor, 7. Conductivity sensor, 8. Jet pump, 9. Water suction pipe, 10. Sprayer, 11. Liquid level detection sensor, 12. Limit sensor, 13. Temperature sensor, 14. Drain valve, 15. Water inlet valve, 16. Three-way valve, 17. Sample injection tube, 18. Air pump, 19. Wireless communication module. DETAILED DESCRIPTION

[0028] The embodiments of the present scheme are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present scheme, and cannot be understood as limiting the present scheme. In the description of the present scheme, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present scheme and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present scheme.

[0029] like Figure 1 and Figure 2 As shown, an on-site online salt spray concentration measuring device of the present embodiment comprises a detection cell 1, a top port of the detection cell 1 is sealed with an air bag 2, and a plurality of input ports on the side wall of the detection cell 1 are respectively connected with a pure water injection pipe 3, a standard sample injection pipe 4 and an air inlet pipe 5, the pure water injection pipe 3 is used to inject pure water into the detection cell 1, the standard sample injection pipe 4 is used to inject a sample solution of standard salinity (i.e., a sample solution with a standard concentration value) into the detection cell 1, the air inlet pipe 5 is used to inject salt spray air into the detection cell 1, and a processor 6 is provided in the measuring device, the processor 6 is electrically connected to a conductivity sensor 7, the conductivity sensor 7 is located inside the detection cell 1 so that it can contact with the salt solution, so that the processor 6 measures the conductivity value of the solution in the detection cell 1 through the conductivity sensor 7.

[0030] It can be understood that the structural scheme of this embodiment is provided with a detection pool 1 for accommodating pure water or a salt solution and an air bag 2 for accommodating salt mist air. The multiple input ports of the detection pool 1 are respectively connected to the pure water injection pipe 3 and the air inlet pipe 5, so the external pure water and salt mist air can enter the detection pool 1 and the air bag 2 through the pure water injection pipe 3. Since the air bag 2 is sealed and sleeved on the top port of the detection pool 1, the salt mist air entering the detection pool 1 can rise in the air bag 2 and inflate the air bag 2. At the same time, the jet pump 8 precipitates water through the pumping pipe and sprays it out from the ejector 10 in atomization, which is continuously circulated. The jet pump 8 and the ejector 10 circulate water and spray to facilitate sufficient contact between the salt mist air in the airbag 2 and the pure water in the detection tank 1, so that the salt mist particles in the salt mist air are fully dissolved in the pure water, and a salt-containing conductive solution is formed in the detection tank 1. In addition, the measuring device of this embodiment also includes a processor 6, and the processor 6 measures the conductivity value of the solution in the detection tank 1 through the conductivity sensor 7, so it can help to enable the processor 6 to automatically detect the salt solution in the detection tank 1 and measure the conductivity value of the solution in the detection tank 1. In addition, the input of the detection tank 1 The port is also connected to a standard sample injection tube 4. In actual use, one or more groups of standard salinity sample solutions can be injected into the detection pool 1 in advance through the standard sample injection tube 4, so that the processor 6 can measure the conductivity value of the standard salinity sample solution through the conductivity sensor 7. After regression calculation of multiple groups of data, calibration parameters can be obtained or calculated in advance. When the conductive solution (the salt-containing conductive solution obtained by dissolving the salt fog particles in the salt fog air into pure water) is subsequently measured, the pre-obtained calibration parameters can be used as a comparison basis to enable the processor 6 to automatically determine the salt concentration of the external environment salt fog air according to the calibration parameters, or the relevant algorithm of the prior art can be written into the processor 6 in advance, and the relevant regression calculation formula for calculating the salt concentration of the salt fog air is converted using the pre-obtained multiple groups of calibration parameters (a univariate linear regression equation is used in the example), so that the processor 6 can automatically determine the concentration of the external environment salt fog air according to the calculation formula. In this way, the salt fog monitoring equipment can be more easily implemented in the long-term unmanned monitoring effect at the seaside, and the structure of the salt fog monitoring equipment can be significantly simplified, and the working process of the monitoring operation is more simplified.

[0031] Preferably, the air inlet pipe 5 is located below the pure water injection pipe 3. The technical effect of this structure is that when the detection pool 1 is filled with pure water through the pure water injection pipe 3 and then the external salt mist air is injected into the detection pool 1 through the air inlet pipe 5, the salt mist air can first enter the pure water and can more fully contact the pure water during the floating process in the pure water, so that the salt mist particles in the salt mist air can be better dissolved in the pure water, thereby forming a conductive solution in the detection pool 1 faster and more smoothly.

[0032] The structural scheme of this embodiment also includes a jet pump 8, a water suction pipe 9 and a sprayer 10, wherein the water suction pipe 9 is located at the bottom of the inner cavity of the detection tank 1 and is connected to the water suction port of the jet pump 8, and the sprayer 10 is located at the port of the detection tank 1 and its spray direction is toward the interior of the airbag 2. Through this structure, the pure water entering the detection tank 1 can be atomized and sprayed into the interior of the airbag 2, so that the salt mist particles in the salt mist air in the airbag 2 can contact and fully dissolve in the pure water in the atomized state, and the pure water in the atomized state continuously condenses and flows downward under the action of gravity into the pure water in the liquefied state, thereby forming a conductive solution. It can be understood that after the pure water is atomized and sprayed, the pure water in the atomized state can more fully contact the salt mist particles in the salt mist air, allowing the salt mist particles in the salt mist air to be more fully and quickly dissolved into the pure water. As the pure water in the atomized state continues to flow back into the pure water in the liquefied state, the dissolved salt mist particles also enter the pure water in the liquefied state along with the atomized pure water, which can more fully and efficiently allow the salt mist particles in the salt mist air to be completely dissolved into the pure water and smoothly form a conductive detection solution.

[0033] In order to facilitate monitoring of the amount of liquid entering the detection pool 1, a liquid level detection sensor 11 is provided in the detection pool 1. The liquid level detection sensor 11 is electrically connected to the processor 6 so that the processor 6 can monitor the internal liquid level of the detection pool 1 through the liquid level detection sensor 11. In actual use, this solution can facilitate the processor 6 to monitor the volume of the solution in the detection pool 1 and obtain the volume data of the saline solution. In actual use, the processor 6 can also use the trigger signal of the liquid level detection sensor 11 as a threshold signal and stop the injection amount of the solution to limit the injection volume of the solution in the detection pool 1 (including the injection volume of the standard salinity sample solution or the injection volume of pure water). Preferably, the liquid level detection sensor 11 of this embodiment is selected as a contact or non-contact liquid level sensor. For example, the non-contact liquid level sensor can select an ultrasonic liquid level sensor, so that the sensor can be installed outside the detection pool 1, which is easier to install.

[0034] On the other hand, in order to facilitate monitoring of the expansion amount of the airbag 2, a limit sensor 12 is also provided above the airbag 2, and the limit sensor 12 is electrically connected to the processor 6, so that the processor 6 can monitor the expansion of the airbag 2 through the limit sensor 12. In actual use, as the salt mist air is continuously injected, the airbag 2 also continues to expand and increase in volume. During the expansion process, when the airbag 2 triggers the upper limit sensor 12 upward, it helps the processor 6 to use the trigger signal of the limit sensor 12 as a threshold signal and stop the injection of salt mist air to limit the injection volume of the salt mist air in the airbag 2.

[0035] As a further improvement of this embodiment, a temperature sensor 13 is further provided in the detection pool 1, and the temperature sensor 13 is electrically connected to the processor 6, so that the processor 6 can monitor the internal solution temperature of the detection pool 1 through the temperature sensor 13 for use in standard temperature calculation and correction.

[0036] Specifically, a drain valve 14 is installed at the bottom of the detection pool 1, and the operation of the drain valve 14 is controlled by the processor 6. Therefore, after completing a test of the solution, the processor 6 can discharge the internal solution of the detection pool 1 through the drain valve 14. After the inside of the detection pool 1 is emptied, it can be rinsed with pure water multiple times before continuing with the next test.

[0037] Specifically, the pure water injection pipe 3 is provided with a water inlet valve 15 , and the water inlet valve 15 is controlled by the processor 6 , so that the processor 6 can start or stop the pure water injection operation to the detection pool 1 .

[0038] Specifically, a three-way valve 16 is provided at the water inlet of the standard sample injection pipe 4, and the three-way valve 16 is controlled by the processor 6. The three-way valve 16 is connected in parallel with three injection pipes 17, that is, the three water inlet ends of the three-way valve 16 are respectively connected with an injection pipe 17. This structure can facilitate the processor 6 to start or stop the sample solution injection operation to the detection pool 1, and can also facilitate three sample solutions of different concentrations of standard salinity to enter the detection pool 1 respectively.

[0039] Specifically, the air inlet pipe 5 is provided with an air pump 18 , and the air pump 18 is controlled by the processor 6 , so that the processor 6 can start or stop the salt spray air injection operation to the detection pool 1 and the air bag 2 .

[0040] In addition, the measured data are temperature corrected and calibrated periodically with standard brine samples.

[0041] As a further improvement of this embodiment, the processor 6 is further provided with a wireless communication module 19, which facilitates the processor 6 to remotely send the monitored and collected data to the outside, and also facilitates further controlling the operation of the entire measuring device by remotely controlling the processor 6.

[0042] This embodiment also designs a measurement scheme based on the above-mentioned measurement device as one of the application examples for reference, which is as follows:

[0043] In the detection pool 1, standard salinity calibration and air salt concentration measurement are performed successively. In this embodiment, step A1 and step A2 are performed successively when performing standard salinity calibration. In step A1, three groups of pre-prepared solution samples with different standard salinities are firstly input into the detection pool 1 separately by using the three-way valve 16. The solution samples with standard salinity are the standard concentration values ​​C n Known solution samples, standard concentration values ​​C of three sets of standard salinity solution samples nThere are three types of solution samples, high, medium and low. After a group of standard salinity solution samples are input into the detection pool, the processor 6 monitors whether the input amount of the solution meets the preset volume through the liquid level detection sensor 11. After the preset volume is met, the processor 6 measures the conductive impedance of the group of solution samples through the conductivity sensor 7. At the same time, the temperature sensor 13 measures the liquid temperature and performs standard temperature compensation calculation. Then, in the same way, the detection system is allowed to respectively measure the conductive impedance of the remaining two groups of solution samples, and then step A2 is performed. In step A2, the processor 6 combines the standard concentration values ​​C of the three groups of solution samples. nand the conductive impedance value, and calibrate and calculate through regression analysis, and obtain the parameters of the regression equation (a univariate linear regression equation is used in the example) in advance. At this time, the monitoring equipment has completed the standard salinity calibration and made preparations for the subsequent measurement of the air salt concentration (it can be performed once at a fixed period). Later, when it is necessary to measure the air salt mist concentration of the external environment, let the monitoring equipment perform the air salt concentration measurement, and perform steps B1 and B2 successively. Use the pure water injection pipe 3 to input pure water into the detection pool 1. After the pure water input meets the preset volume, use the air intake pipe 5 to input the salt mist air into the detection pool 1. After the salt mist air input meets the preset volume, start the jet pump 8, and eject the pure water through the sprayer 10. Circulate continuously, and cause the salt mist air to fully dissolve into the pure water within the preset time period, so that a conductive solution is formed in the detection pool; then In step B2, the processor 6 measures the conductive impedance of the conductive solution through the conductivity sensor 7, and the temperature sensor 13 measures the liquid temperature to perform standard temperature compensation calculation. Then, the processor 6 substitutes the conductivity value of the conductive solution after compensation into the above-mentioned pre-derived regression equation to calculate the salinity concentration value C of the conductive solution. Finally, according to the volume of pure water entering the detection pool 1 (the processor 6 can limit the volume of pure water entering the detection pool 1 according to the trigger signal of the liquid level detection sensor 11) and the volume of salt fog air (the processor 6 can determine the volume of salt fog air according to the trigger signal of the limit sensor 12), the processor 6 calculates the salinity concentration value C of the conductive solution. The signal limits the air volume of the airbag 2 (the volume of the air entering the airbag 2) to calculate the salt concentration P of the salt mist air, and finally the air salt mist concentration of the seaside environment can be smoothly calculated. That is to say, as long as the standard salinity calibration is completed in advance in the on-site monitoring equipment, after the calibration calculates the regression equation, when it is necessary to detect the air condition, just trigger the outdoor on-site air monitoring equipment to automatically extract a fixed volume of pure water and salt mist air into the detection pool to dissolve the salt in the salt mist air into the pure water and form a conductive solution. Then the equipment can automatically calculate the conductivity value of the conductive solution after standard temperature compensation through the detection system, and then substitute the conductivity value into the regression equation obtained in advance through the processor 6, so as to automatically calculate and finally convert the salt concentration value of the salt mist air. The whole measurement process for the on-site air salt mist concentration can be more simplified, the measurement method is simpler, and it is easier for the on-site monitoring equipment to realize long-term automatic monitoring of the air salt mist concentration of the seaside environment under unattended conditions, meet the needs of long-term continuous and stable monitoring of the air environment, and are suitable for outdoor monitoring equipment to automatically monitor the salt concentration of the air online under unattended conditions.

[0044] The specific method of measuring the conductive impedance of each group of solution samples in the above step A1 is that the processor 6 measures the conductivity values ​​R of the three groups of solution samples one by one through the conductivity sensor 7. t , the processor 6 converts the conductivity value R of the solution sample into t Perform temperature compensation correction and calculate the solution sample conductivity value R tTemperature compensation correction value R n The specific method of obtaining the regression equation in step A2 is to transform the known standard concentration value C n and the calculated temperature compensation correction value R n As regression equation C n =kR n + b (a univariate linear regression equation is used in the example) is the dependent variable and the independent variable, and then the processor 6 combines the standard concentration values ​​C of the three groups of solution samples n and the calculated temperature compensation correction value R n , the univariate linear regression equation C is calculated by univariate linear regression analysis n =kR n +b, the independent variable coefficient k and the intercept coefficient b, constitute the univariate linear regression equation C = kR n +b, the independent variable coefficient k and the intercept coefficient b in the equation are now known, and preparation is made for the subsequent measurement of the air salt concentration (i.e., the calculation of the salinity concentration C of the conductive solution). Then in step B2, the processor 6 measures the conductivity value R1 of the conductive solution through the conductivity sensor 7, and the processor 6 performs temperature compensation correction on the conductivity value R1 of the conductive solution. The processor 6 performs temperature compensation correction on the conductivity value R1 of the conductive solution and calculates the temperature compensation correction value R1 of the conductivity value R1 of the conductive solution. n , and the calculated temperature compensation correction value R n Substitute into the univariate linear regression equation C = kR n +b, the salinity concentration value C of the conductive solution can be calculated smoothly, and the measurement method is simpler. For the convenience of recording, when executing step A2, the processor 6 saves the calculated independent variable coefficient k and intercept coefficient b to the EEPROM or FLASH or other fixed memory of the single-chip microcomputer, and when executing step B2, the independent variable coefficient k and intercept coefficient b are taken out and substituted into the univariate linear regression equation C=kR n The salinity concentration value C of the conductive solution is calculated in +b, and the processor 6 can store or transmit the data through the electronic communication chip so that the system can achieve the purpose of automatic sampling and measurement.

[0045] It should be noted that the temperature compensation correction mentioned above is an existing technical means. Its principle is that in electronic components, when other conditions remain unchanged, their output signals will drift with the change of temperature. In order to reduce this phenomenon, it is necessary to adopt a certain algorithm to correct the output result to achieve the purpose of eliminating the influence of temperature change on the output signal of the component within a certain range. Specifically, when executing step A1, the computing system calculates the temperature of the component according to formula R n =R t / (1+a(T1-T0)) for the conductivity value of the solution sample R tPerform temperature compensation correction and calculate the solution sample conductivity value R t Temperature compensation correction value R n , where a is the temperature correction coefficient, the correction coefficient a is the parameter value of the conductivity sensor calibrated before leaving the factory, T1 is the measured temperature of the solution sample, and T0 is the correction temperature. In this embodiment, the correction temperature T0 can be selected according to the actual room temperature of the environment in different regions. In this embodiment, T0 can be selected as 25°C. Subsequently, when executing step B2, the computing system calculates the value of the conductivity sensor according to the formula R n = R1 / (1+a(T2-T0)) The conductivity value R1 of the conductive solution is corrected by standard temperature compensation, and the conductivity value R of the conductive solution is calculated. t Standard temperature compensation correction value R n , where a is the temperature correction coefficient, the correction coefficient a is the parameter value calibrated by the electrode sensor before leaving the factory, T2 is the measured temperature of the conductive solution, and T0 is the correction temperature. In this embodiment, the correction temperature T0 can be selected according to the actual room temperature of the environment in different regions. In this embodiment, T0 can be selected as 25°C.

[0046] When executing step B2, the processor 6 calculates the salinity concentration value C of the conductive solution through the regression equation, and then calculates the salt concentration P of the salt fog air according to the formula P=(C×L / 1000) / V, wherein L is the volume of pure water entering the detection pool 1, and V is the volume of the salt fog air entering the detection pool 1, so that the monitoring equipment can automatically convert the salt concentration value of the external environment salt fog air according to the measured and calculated salinity concentration value C of the conductive solution, so that the entire measurement process of the on-site air salt fog concentration can be more simplified, the measurement method is simpler, and it is easier to realize automatic monitoring.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present scheme, rather than to limit it. Although the present scheme has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present scheme.

Claims

1. An on-site online salt spray concentration measurement device, It is characterized in that It comprises a detection pool (1), wherein the top port of the detection pool (1) is sealed and sleeved with an air bag (2); The multiple input ports of the detection pool (1) are respectively connected to: A pure water injection tube (3) used for injecting pure water into the detection pool (1); A standard sample injection tube (4) is used to inject a sample solution of standard salinity into the detection cell (1); An air inlet pipe (5) is used to inject salt mist air into the detection pool (1); The device further comprises a processor (6), wherein the processor (6) is electrically connected to a conductivity sensor (7) located inside the detection cell (1), and the processor (6) measures the conductivity value of the solution in the detection cell (1) through the conductivity sensor (7).

2. The on-site online salt spray concentration measuring device according to claim 1, It is characterized in that It also includes a jet pump (8), a water suction pipe (9) and a sprayer (10); The water extraction pipe (9) is located at the bottom of the inner cavity of the detection pool (1) and is connected to the water extraction port of the jet pump (8); the sprayer (10) is located at the top of the detection pool (1) and its spraying direction is toward the inside of the airbag (2).

3. The on-site online salt spray concentration measuring device according to claim 1, It is characterized in that The detection pool (1) is provided with a liquid level detection sensor (11) electrically connected to the processor (6), so that the processor (6) can monitor the internal liquid level of the detection pool (1) through the liquid level detection sensor (11).

4. The on-site online salt spray concentration measuring device according to claim 3, It is characterized in that The liquid level detection sensor (11) is a contact or non-contact liquid level sensor.

5. The on-site online salt spray concentration measuring device according to claim 1, It is characterized in that It also includes a limit sensor (12) electrically connected to the processor (6), and the limit sensor (12) is located above the airbag (2), so that the processor (6) can monitor the inflation status of the airbag (2) through the limit sensor (12).

6. The on-site online salt spray concentration measuring device according to claim 1, It is characterized in that The detection pool (1) is provided with a temperature sensor (13) electrically connected to the processor (6), so that the processor (6) can monitor the internal solution temperature of the detection pool (1) through the temperature sensor (13).

7. The on-site online salt spray concentration measuring device according to claim 1, It is characterized in that A drainage valve (14) controlled by the processor (6) is provided at the bottom of the detection pool (1).

8. The on-site online salt spray concentration measuring device according to claim 1, It is characterized in that The pure water injection pipe (3) is provided with a water inlet valve (15) controlled by the processor (6).

9. The on-site online salt spray concentration measuring device according to claim 1, It is characterized in that The water inlet of the standard sample injection tube (4) is provided with a three-way valve (16) controlled by the processor (6), and the three-way valve (16) is connected in parallel with three injection tubes (17).

10. The on-site online salt spray concentration measuring device according to claim 1, It is characterized in that The air inlet pipe (5) is provided with an air pump (18) controlled by the processor (6).

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