Water quality multi-parameter monitoring system with automatic quality control function

Abstract

The present disclosure provides a water quality multi-parameter monitoring system with an automatic quality control function, belonging to the technical field of water quality monitoring. The water quality multi-parameter monitoring system with an automatic quality control function includes a data acquisition unit and a measuring unit, the measuring unit includes a liquid inlet module, a measuring cell, a second water pump, a first three-way valve and a second three-way valve, the liquid inlet module is used to add a standard liquid to the first port of the measuring cell, the common end of the first three-way valve is connected to the second port of the measuring cell through a first pipeline, the second water pump is arranged on the first pipeline, the first end of the first three-way valve is used to access the water sample, the second end of the first three-way valve is connected to the common end of the second three-way valve, the first end of the second three-way valve is used to communicate with a wastewater pipe, the second end of the second three-way valve is used to communicate with a waste liquid pipe, a detection electrode is arranged in the measuring cell, and the output end of the detection electrode is connected to the data acquisition unit for communication. The present disclosure can improve the accuracy of water quality monitoring and save manpower and time costs.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water quality monitoring, and in particular to a water quality multi-parameter monitoring system with an automatic quality control function. Background Art

[0002] In the field of multi-parameter online monitoring of water quality, digital sensors are widely used to measure specific pollutants. Among them, pH sensors, conductivity sensors, dissolved oxygen sensors and turbidity sensors are often used in online monitoring of surface water and groundwater. Their measurement results are usually used as an important basis for evaluating the degree of water pollution and water quality, which helps to fully understand and grasp the quality status of water bodies and promptly discover and deal with water pollution incidents.

[0003] In order to ensure the reliability and accuracy of the monitoring results of the above sensors, there are two main existing methods. One is to select sensors with reliable performance, which is especially helpful in improving the conductivity and turbidity measurement results. However, there are still some problems to be faced. The pH sensor is prone to passivation in low ion concentration water for a long time, and the measurement window of the dissolved oxygen sensor is prone to contaminants attached to cause measurement abnormalities. The second is that the operation and maintenance personnel regularly carry test tools and standard liquids to the inspection site, use standard liquids to check the sensors, and perform other maintenance work after the verification. If the verification fails, the sensor needs to be cleaned and checked again; if the problem is still not solved, a calibration operation must be performed, followed by another check until the test results meet the standards. However, this process is relatively cumbersome, and the maintenance effect is also easily limited by the technical level of the maintenance personnel. Summary of the invention

[0004] The disclosed embodiments provide a water quality multi-parameter monitoring system with an automatic quality control function to solve the problem that the quality control process of the existing water quality monitoring system is time-consuming and labor-intensive.

[0005] The disclosed embodiment provides a water quality multi-parameter monitoring system with automatic quality control function, including a data acquisition unit and a measurement unit.

[0006] The measuring unit comprises a liquid inlet module, a measuring cell, a second water pump, a first three-way valve and a second three-way valve, wherein the liquid inlet module is used to add a standard liquid to a first port of the measuring cell, a common end of the first three-way valve is communicated with a second port of the measuring cell via a first pipeline, the second water pump is arranged on the first pipeline, a first end of the first three-way valve is used to access a water sample, a second end of the first three-way valve is connected to a common end of the second three-way valve, a first end of the second three-way valve is used to communicate with a waste water pipe, and a second end of the second three-way valve is used to communicate with a waste liquid pipe.

[0007] The measuring cell is provided with a detection electrode, and the detection electrode is used to detect the water sample or the standard solution in the measuring cell. The output end of the detection electrode is communicatively connected with the data acquisition unit.

[0008] In an exemplary embodiment of the present disclosure, the liquid inlet module includes a first water pump and a multi-way valve, the common end of the multi-way valve is connected to the second port of the measuring cell through a second pipe, the first water pump is arranged on the second pipe, and the multiple branches of the multi-way valve are respectively used to connect multiple standard liquids.

[0009] In an exemplary embodiment of the present disclosure, the upper cover of the measuring pool is provided with a water inlet and a plurality of first water flow channels, the first ends of the plurality of first water flow channels are connected to the water inlet, the second ends of the plurality of first water flow channels are distributed along a first path, the first path is located at the bottom of the upper cover, and the extension direction of the first path is the same as the circumference of the wall of the measuring pool.

[0010] In an exemplary embodiment of the present disclosure, the upper cover of the measuring pool includes a first layer, a second layer and a third layer which are arranged in sequence from top to bottom, the first layer is provided with the water inlet, the second layer is provided with a ring-shaped second water flow channel, the third layer is provided with a plurality of water outlets, and the second water flow channel is connected to the plurality of water outlets to form a plurality of the first water flow channels.

[0011] In an exemplary embodiment of the present disclosure, an annular accommodating cavity is provided on the inner side and the outer side of the second water flow channel, and the accommodating cavity is used to place a sealing ring.

[0012] In an exemplary embodiment of the present disclosure, the upper cover of the measuring cell is provided with a water inlet, and a cleaning pipe is provided in the measuring cell, one end of the cleaning pipe is connected to the water inlet, and the other end of the cleaning pipe extends to the measuring window of the detection electrode.

[0013] In an exemplary embodiment of the present disclosure, a plurality of external stirring systems are further included, and the output ends of the plurality of external stirring systems are respectively connected to the plurality of branches of the multi-way valve.

[0014] In an exemplary embodiment of the present disclosure, the water quality multi-parameter monitoring system with automatic quality control function further includes a first air pump, a first air blowing pipe and a controller.

[0015] One end of the first air blowing tube is connected to the first air pump, and the other end of the first air pump faces the measuring window of the detection electrode. The controller is used to control the first air pump to open after each detection to dry the detection electrode.

[0016] In an exemplary embodiment of the present disclosure, the water quality multi-parameter monitoring system with automatic quality control function further includes a second air pump, a second air blowing pipe and a controller.

[0017] One end of the second air blowing pipe is connected to the second air pump, and the other end of the second air pump is connected to the corresponding branch of the multi-way valve. The controller is used to control the second air pump to open after each detection to dry the corresponding branch of the multi-way valve.

[0018] In an exemplary embodiment of the present disclosure, the water quality multi-parameter monitoring system with automatic quality control function further includes a controller, wherein the controller is used to:

[0019] Calculating a first parameter based on the operating data of the detection electrode;

[0020] Calculating a second parameter based on the water sample data;

[0021] calculating a first period based on the first parameter and the second parameter;

[0022] Based on the first cycle, the liquid inlet module is controlled to add a standard solution to the first port of the measuring cell to achieve automatic quality control of the detection electrode.

[0023] The beneficial effects of the water quality multi-parameter monitoring system with automatic quality control function provided by the embodiments of the present disclosure are:

[0024] In the disclosed embodiment, when monitoring the water quality parameters of the water sample, the second water pump draws the water sample from the first end of the first three-way valve to the measuring pool, the detection electrode detects the water sample in the measuring pool, and outputs the measurement data to the data acquisition unit, and the data acquisition unit can obtain the corresponding water quality parameters by analyzing the measurement data; after the water quality parameter monitoring of the water sample is completed, the second water pump reverses to discharge the water sample in the measuring pool through the second end of the first three-way valve and the first end of the second three-way valve in sequence; the liquid inlet module can also be periodically controlled to add standard solution to the measuring pool to achieve quality control of the detection electrode. During the quality control process, the detection electrode detects the standard solution, and the quality control result of the detection electrode can be obtained by comparing the measurement result of the detection electrode with the standard parameter of the standard solution; after the quality control is completed, the second water pump reverses to discharge the standard solution in the measuring pool through the second end of the first three-way valve and the second end of the second three-way valve in sequence.

[0025] The disclosed embodiment realizes an integrated design of water quality monitoring and automatic quality control, which is beneficial to improving the accuracy of water quality monitoring and saving manpower and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, 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 only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 is a schematic diagram of the structure of a water quality multi-parameter monitoring system with automatic quality control function provided by an embodiment of the present disclosure;

[0028] Figure 2 is a cross-sectional view of a measurement cell provided by an embodiment of the present disclosure;

[0029] Figure 3 is a schematic diagram of the structure of the second layer of the upper cover provided in an embodiment of the present disclosure;

[0030] Figure 4 is a schematic structural diagram of an external stirring system provided in an embodiment of the present disclosure;

[0031] In the figure: 1 data acquisition unit, 2 measuring unit, 3 liquid inlet module, 31 first water pump, 32 multi-way valve, 4 measuring pool, 41 upper cover, 411 first layer, 412 second layer, 4121 second water flow channel, 4122 accommodating chamber, 413 third layer, 42 water inlet, 43 cleaning pipe, 44 stirring assembly, 45 detection electrode, 46 liquid level sensor, 5 second water pump, 6 first three-way valve, 7 second three-way valve, 8 waste water pipe, 9 waste liquid pipe, 10 external stirring system, 101 measuring cup, 102 magnetic stirrer. DETAILED DESCRIPTION

[0032] In order to enable people in the technical field to better understand the present solution, the technical solution in the embodiment of the present solution will be clearly described below in conjunction with the drawings in the embodiment of the present solution. Obviously, the described embodiment is an embodiment of a part of the present solution, not all of the embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0033] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0034] The following is a detailed description of the implementation of the present disclosure in conjunction with the specific drawings:

[0035] Figure 1This is a schematic diagram of the structure of a water quality multi-parameter monitoring system with automatic quality control function provided by an embodiment of the present disclosure. Figure 1 The water quality multi-parameter monitoring system with automatic quality control function includes a data acquisition unit 1 and a measurement unit 2.

[0036] The measuring unit 2 includes a liquid inlet module 3, a measuring pool 4, a second water pump 5, a first three-way valve 6 and a second three-way valve 7. The liquid inlet module 3 is used to add a standard liquid to the first port of the measuring pool 4. The common end of the first three-way valve 6 is connected to the second port of the measuring pool 4 through a first pipeline. The second water pump 5 is arranged on the first pipeline. The first end of the first three-way valve 6 is used to connect to the water sample. The second end of the first three-way valve 6 is connected to the common end of the second three-way valve 7. The first end of the second three-way valve 7 is used to connect to the waste water pipe 8. The second end of the second three-way valve 7 is used to connect to the waste liquid pipe 9.

[0037] A detection electrode 45 is provided in the measuring cell 4 . The detection electrode 45 is used to detect the water sample or standard solution in the measuring cell 4 . The output end of the detection electrode 45 is communicatively connected with the data acquisition unit 1 .

[0038] In this embodiment, the detection electrode 45 may include a pH electrode (sensor), a conductivity electrode (sensor), a dissolved oxygen electrode (sensor), a turbidity electrode (sensor), and other detection electrodes 45. Each detection electrode 45 corresponds to a measurement unit 2. Figure 1 4 measuring units 2 are shown in the figure. Among them, the measuring units 2 corresponding to the pH electrode (sensor), the conductivity electrode (sensor) and the turbidity electrode (sensor) all include a liquid inlet module 3, a measuring cell 4, a second water pump 5, a first three-way valve 6 and a second three-way valve 7. The dissolved oxygen electrode (sensor) uses air for quality control. Therefore, the measuring unit 2 corresponding to the dissolved oxygen electrode (sensor) is not provided with a liquid inlet module 3.

[0039] When monitoring the water quality parameters of the water sample, the second water pump 5 draws the water sample from the first end of the first three-way valve 6 to the measuring pool 4, the detection electrode 45 detects the water sample in the measuring pool 4, and outputs the measurement data to the data acquisition unit 1. The data acquisition unit 1 can obtain the corresponding water quality parameters by analyzing the measurement data; after the water quality parameter monitoring of the water sample is completed, the second water pump 5 is reversed to discharge the water sample in the measuring pool 4 through the second end of the first three-way valve 6 and the first end of the second three-way valve 7 in sequence; the liquid inlet module 3 can also be periodically controlled to add standard liquid to the measuring pool 4 to achieve quality control of the detection electrode 45. During the quality control process, the detection electrode 45 detects the standard liquid, and the quality control result of the detection electrode 45 can be obtained by comparing the measurement result of the detection electrode 45 with the standard parameter of the standard liquid; after the quality control is completed, the second water pump 5 is reversed to discharge the standard liquid in the measuring pool 4 through the second end of the first three-way valve 6 and the second end of the second three-way valve 7 in sequence.

[0040] Among them, the second water pump 5 specifically adopts a peristaltic pump, the first three-way valve 6 and the second three-way valve 7 are double-channel clamp valves, the first end (normally closed end) of the first three-way valve 6 is connected to the water sample tube, and the second end (normally open end) is connected to the common end of the Y-type tee through a hose, and the other two branches of the Y-type tee are respectively connected to the normally open end (first end) and the normally closed end (second end) of the second three-way valve 7 through a hose, thereby realizing effective separation of wastewater and waste liquid and reducing cross contamination.

[0041] This embodiment realizes the integrated design of water quality monitoring and automatic quality control, which is conducive to improving the accuracy of water quality monitoring and saving manpower and time costs.

[0042] In an exemplary embodiment of the present disclosure, the liquid inlet module 3 includes a first water pump 31 and a multi-way valve 32, the common end of the multi-way valve 32 is connected to the second port of the measuring cell 4 through a second pipe, the first water pump 31 is arranged on the second pipe, and the multiple branches of the multi-way valve 32 are respectively used to connect multiple standard liquids.

[0043] In this embodiment, the first water pump 31 is specifically a peristaltic pump. The first water pump 31 and the multi-way valve 32 are used in conjunction to add a variety of standard solutions of different concentrations into the measuring cell 4 to achieve quality control of the detection electrode 45 .

[0044] In an exemplary embodiment of the present disclosure, an upper cover 41 of the measuring pool 4 is provided with a water inlet 42 and a plurality of first water flow channels, the first ends of the plurality of first water flow channels are all connected to the water inlet 42, the second ends of the plurality of first water flow channels are distributed along a first path, the first path is located at the bottom of the upper cover 41, and the extension direction of the first path is the same as the circumferential direction of the pool wall of the measuring pool 4.

[0045] In this embodiment, the measuring pool 4 adopts a barrel-shaped structure with an outer circle and an inner cone, and is made of transparent organic glass. The inner cone shape is conducive to the full mixing of the liquid and can also minimize the residual stains during cleaning. The transparent organic glass material can, on the one hand, maintain a certain mechanical strength of the overall structure, and on the other hand, facilitate the inspection of the mixing and cleaning effects.

[0046] The circumference (i.e., cross-sectional direction) of the wall of the measuring pool 4 is circular, the first path is also circular, and the circle enclosed by the first path is equal to the cross-sectional size of the wall of the measuring pool 4. Therefore, the second ends of the multiple first water flow channels are distributed directly above the wall of the measuring pool 4.

[0047] In this embodiment, after the water quality parameter monitoring of the water sample is completed or the quality control of the detection electrode 45 is completed, cleaning water can be added to the water inlet 42 of the upper cover 41 of the measuring pool 4 to clean the measuring pool 4 in preparation for the next water quality parameter monitoring of the water sample.

[0048] Among them, after the cleaning water is added from the water inlet 42 of the upper cover 41 of the measuring pool 4, it flows out through multiple first water flow channels, and the second ends of the multiple first water flow channels are distributed directly above the wall of the measuring pool 4. After the cleaning water flows out from the multiple first water flow channels, it can be flushed along the wall of the measuring pool 4 to achieve effective cleaning of the measuring pool 4.

[0049] In an exemplary embodiment of the present disclosure, the upper cover 41 of the measuring pool 4 includes a first layer 411, a second layer 412 and a third layer 413 which are arranged in sequence from top to bottom, the first layer 411 is provided with a water inlet 42, the second layer 412 is provided with a ring-shaped second water flow channel 4121, the third layer 413 is provided with multiple water outlets, and the second water flow channel 4121 is connected to the multiple water outlets to form multiple first water flow channels.

[0050] In this embodiment, the cleaning water enters the annular second water flow channel 4121 from the water inlet 42 of the first layer 411, and the cleaning water can be evenly distributed along the circumference of the wall of the measuring pool 4. Correspondingly, multiple water outlets can be evenly arranged along the circumference of the third layer 413. After the cleaning water flows out from the multiple water outlets, it is evenly distributed to various areas of the wall of the measuring pool 4, further improving the cleaning effect.

[0051] In addition, the first layer 411, the second layer 412 and the third layer 413 are connected for disassembly. The first layer 411 is fixed to the detection electrode 45. The entire three-layer structure is first connected together with screws and then connected to the measuring cell 4 with butterfly bolts, which is convenient for disassembly and maintenance.

[0052] In an exemplary embodiment of the present disclosure, an annular accommodating cavity 4122 is provided on the inner side and the outer side of the second water flow channel 4121 , and the accommodating cavity 4122 is used to place a sealing ring.

[0053] In this embodiment, the inner and outer accommodating cavities 4122 of the second water flow channel 4121 are coaxially arranged with the second water flow channel 4121, and sealing rings can be arranged in the inner and outer accommodating cavities 4122 to limit the cleaning water between the inner and outer accommodating cavities 4122 to avoid leakage of the cleaning water.

[0054] In an exemplary embodiment of the present disclosure, the upper cover 41 of the measuring cell 4 is provided with a water inlet 42 , and a cleaning pipe 43 is provided in the measuring cell 4 , one end of the cleaning pipe 43 is connected to the water inlet 42 , and the other end of the cleaning pipe 43 extends to the measuring window of the detection electrode 45 .

[0055] In this embodiment, the cleaning pipe 43 is made of "Hastelloy" material to improve its tolerance. One end of the cleaning pipe 43 is fastened to a water outlet of the third layer 413 of the upper cover 41 of the measuring tank 4 by a threaded manner, and the other end adopts a "closed-end" design and extends to the measuring window of the detection electrode 45 to clean the measuring window of the detection electrode 45, thereby enhancing the cleaning effect of the detection electrode 45.

[0056] After the cleaning water enters from the water inlet 42 of the upper cover 41, it is transported to the measuring window of the detection electrode 45 through the cleaning pipe 43, and is transported to the pool wall through the first water flow channel to fully remove the water sample residue at the electrode and the pool wall.

[0057] In an exemplary embodiment of the present disclosure, the water quality multi-parameter monitoring system with automatic quality control function also includes multiple groups of external stirring systems 10, and the output ends of the multiple groups of external stirring systems 10 are respectively connected to multiple branches of the multi-way valve 32.

[0058] In this embodiment, each set of external stirring systems 10 includes a magnetic stirrer 102 and a measuring cup 101. When performing quality control of the detection electrode 45, the standard solution can be fully stirred in the measuring cup 101, and then pumped into the measuring pool 4 through the first water pump 31 and the multi-way valve 32. Through the coordination of the magnetic external stirring system 10, it can effectively prevent corrosion and ensure that the sample is fully mixed, thereby improving the accuracy of the measurement.

[0059] Each magnetic stirrer 102 uses magnetic induction technology to achieve contactless stirring motion. The magnetic stirrer 102 is operated at a controllable speed through a magnetic stirrer wrapped in polytetrafluoroethylene, which not only improves the uniformity of sample mixing in the measuring cup 101, but also reduces the risk of cross contamination. The measuring cup 101 is a cylindrical structure with an open top and a sealed bottom, which effectively prevents the leakage of liquid during the mixing process and ensures the safety and reliability of the experiment. In addition, the measuring cup 101 is made of transparent or light-colored plexiglass, which is not only convenient for real-time observation of the mixing process, but also effectively prevents the sample from adhering to the cup wall, providing more precise control for the mixing process of the magnetic external stirring system 10, ensuring the uniformity and reliability of the mixing.

[0060] In an exemplary embodiment of the present disclosure, the water quality multi-parameter monitoring system with automatic quality control function further includes a first air pump, a first air blowing pipe and a controller.

[0061] One end of the first air blowing pipe is connected to the first air pump, and the other end of the first air pump faces the measuring window of the detection electrode 45. The controller is used to control the first air pump to open after each detection to dry the detection electrode 45.

[0062] In this embodiment, after each measurement, the first air pump can be started to send air to the measuring window of the detection electrode 45 through the first air blowing pipe under the measuring cell 4 to dry the residual moisture, improve the test accuracy and extend the life of the detection electrode 45.

[0063] In an exemplary embodiment of the present disclosure, the water quality multi-parameter monitoring system with automatic quality control function further includes a second air pump, a second air blowing pipe and a controller.

[0064] One end of the second air blowing pipe is connected to the second air pump, and the other end of the second air pump is connected to the corresponding branch of the multi-way valve 32. The controller is used to control the second air pump to open after each detection to dry the corresponding branch of the multi-way valve 32.

[0065] In this embodiment, after each quality control is completed, the second air pump can be started to pump air to the corresponding pipeline through the multi-way valve 32, pushing the residual standard liquid in the valve body and the pipeline back into the measuring cup 101, reducing the impact of pipeline residue on measurement.

[0066] In an exemplary embodiment of the present disclosure, the water quality multi-parameter monitoring system with automatic quality control function further includes a controller, which is used to:

[0067] Calculating a first parameter based on the operating data of the detection electrode 45;

[0068] calculating a second parameter based on the water sample data;

[0069] calculating a first period based on the first parameter and the second parameter;

[0070] Based on the first cycle, the liquid inlet module 3 is controlled to add a standard solution to the first port of the measuring cell 4 , so as to realize automatic quality control of the detection electrode 45 .

[0071] In this embodiment, the operating data of the detection electrode 45 may include the usage time and usage frequency of the detection electrode 45. These data indicate the number of times the detection electrode 45 is used. As the number of uses increases, the performance of the detection electrode 45 will decline. Therefore, as the number of uses increases, the quality control time interval of the detection electrode 45 needs to be shortened.

[0072] At the same time, the water sample environment in which the detection electrode 45 works will also affect the performance of the detection electrode 45. For example, in a water sample that is highly corrosive or contains a large number of suspended particles, the performance of the detection electrode 45 will deteriorate faster. In order to ensure the detection accuracy of the detection electrode 45, the quality control time interval of the detection electrode 45 needs to be shortened.

[0073] This embodiment comprehensively considers the influence of the operation data of the detection electrode 45 and the water sample data on the performance of the detection electrode 45, firstly calculates the first parameter based on the operation data of the detection electrode 45, then calculates the second parameter based on the water sample data, and then calculates the quality control time interval (i.e., the first cycle) of the detection electrode 45 based on the first parameter and the second parameter. The quality control of the detection electrode 45 based on the first cycle can be performed according to the actual needs of each detection electrode 45. Compared with the traditional method of performing quality control of the detection electrode 45 based on a fixed cycle, the number of quality control times can be reduced as much as possible on the basis of ensuring the detection accuracy of the detection electrode 45.

[0074] The process of calculating the quality control time interval of the detection electrode 45 based on the first parameter and the second parameter can be described in detail as follows: the first parameter and the second parameter are weighted and summed to obtain a first adjustment factor , based on the first adjustment factor For preset periodic reference values Adjust to get the first cycle Specifically, the first cycle can be calculated using the following formula: :

[0075] In an exemplary embodiment of the present disclosure, calculating the first parameter based on the operating data of the detection electrode 45 includes:

[0076] Calculating a third parameter based on the usage time of the detection electrode 45;

[0077] Calculating a fourth parameter based on the usage frequency of the detection electrode 45;

[0078] The first parameter is calculated based on the third parameter and the fourth parameter.

[0079] In this embodiment, a specific implementation method of calculating the first parameter based on the operating data of the detection electrode 45 is provided.

[0080] The third parameter can be calculated in segments based on the usage time of the detection electrode 45. For example, when the usage time is less than 6 months, the third parameter is assigned a first value. When the usage time is between 6 months and 12 months, the third parameter is assigned a second value. When the usage time is between 12 months and 24 months, the third parameter is assigned a third value. When the usage time is greater than 24 months, the detection electrode 45 needs to be replaced. The first value is greater than the second value, and the second value is greater than the third value. The third parameter can be calculated using the following formula:

[0081]

[0082] in, Represents the third parameter, , , represent the first value, the second value and the third value respectively, Indicates the usage time of the detection electrode 45.

[0083] Meanwhile, the negative correlation between the usage frequency and the fourth parameter may be used to calculate the fourth parameter corresponding to the usage frequency. Specifically, the fourth parameter may be calculated using the following formula:

[0084]

[0085] in, Represents the fourth parameter, Indicates the frequency of use, is a preset constant, indicating the reference value of the operating frequency. is the preset coefficient.

[0086] On the basis of obtaining the third parameter and the fourth parameter, the third parameter and the fourth parameter may be weightedly summed to obtain the first parameter.

[0087] In an exemplary embodiment of the present disclosure, calculating the second parameter based on the water sample data includes:

[0088] calculating a fifth parameter based on the pH value of the water sample;

[0089] calculating a sixth parameter based on the turbidity of the water sample;

[0090] The second parameter is calculated based on the fifth parameter and the sixth parameter.

[0091] In this embodiment, a specific implementation method for calculating the second parameter based on water sample data is provided.

[0092] Specifically, the fifth parameter may be calculated using the following negative correlation relationship:

[0093]

[0094] in, Represents the fifth parameter, Indicates the pH value of the water sample, is the preset coefficient.

[0095] Then the sixth parameter is calculated using the following negative correlation:

[0096]

[0097] in, represents the sixth parameter, Indicates the turbidity of the water sample. is a preset constant, indicating the reference value of the turbidity of the water sample. is the preset coefficient.

[0098] On the basis of obtaining the fifth parameter and the sixth parameter, a weighted sum of the fifth parameter and the sixth parameter may be performed to obtain the second parameter.

[0099] In a possible embodiment of the present disclosure, the controller may also be used for:

[0100] Obtain climate information of the target area; the target area is the area where the water sample is located.

[0101] If the climate information shows that the climate of the target area belongs to a preset climate range, the second period is adjusted based on a preset first adjustment factor.

[0102] Based on the adjusted second cycle, the second water pump 5 is controlled to add water sample to the second port of the measuring cell 4 to achieve automatic monitoring of the water sample.

[0103] In this embodiment, the climate information can be directly obtained from an external network / external data terminal. The preset climate range can include extreme weather climates caused by weather changes such as heavy rain, floods and droughts.

[0104] This embodiment takes into account that extreme weather and climate will have an impact on water quality: for example, heavy rain or floods will cause soil erosion, washing pollutants and sediment into rivers and lakes; drought will dry up water sources, causing water quality to concentrate and become more vulnerable to pollutants. Therefore, when extreme weather and climate are detected in the target area, the preset second adjustment factor can be used to adjust the water quality monitoring period (i.e., the second period) to shorten the water quality monitoring period, thereby effectively realizing water quality parameter monitoring.

[0105] Optionally, the preset second adjustment factor may be an adjustment coefficient, and the range of the adjustment coefficient is 0-1. Adjusting the second period based on the preset second adjustment factor may be described in detail as follows: the second adjustment factor is adjusted to the reference value of the water quality monitoring period. The product of is determined as the adjusted second period .

[0106] In a possible embodiment of the present disclosure, the controller may also be used for:

[0107] Get the temperature information of the target area; the target area is the area where the water sample is located.

[0108] If the temperature information shows that the temperature of the target area is greater than the preset temperature, the second period is adjusted based on the temperature of the target area.

[0109] Based on the adjusted second cycle, the second water pump 5 is controlled to add water sample to the second port of the measuring cell 4 to achieve automatic monitoring of the water sample.

[0110] In this embodiment, temperature information can be directly obtained from the external network / external data terminal. This embodiment takes into account that the increase in temperature will increase the evaporation rate of water and increase the evaporation loss of water resources; at the same time, the increase in temperature may also lead to a decrease in dissolved oxygen in the water, which will affect the respiration and survival of aquatic organisms, thereby causing changes in water quality. Therefore, when the temperature of the target area is greater than the preset temperature, the water quality monitoring cycle can be adjusted based on the temperature of the target area to shorten the water quality monitoring cycle, thereby effectively realizing the parameter monitoring of water quality.

[0111] Optionally, adjusting the second cycle based on the temperature of the target area can be detailed as follows:

[0112] The second cycle is adjusted by adjusting the formula;

[0113] The adjustment formula is: ; where is the second period after adjustment, is the reference value of the water quality monitoring cycle, is the temperature of the target area, is the preset coefficient, is the preset temperature.

[0114] The following takes the pH detection of water samples as an example to illustrate the working process of this embodiment:

[0115] (1) Rinse before measurement: First, start the stirring assembly 44. Then, after the second water pump 5 reverses for a set time, any remaining water sample is discharged to the waste water pipe 8 through the normally open ends of the first three-way valve 6 and the second three-way valve 7. Next, the second water pump 5 rotates forward to draw the water sample into the measuring tank 4 through the normally closed end of the first three-way valve 6, and stops rotating forward after the pumping time has been set. Then, the second water pump 5 reverses to discharge the water sample to the waste water pipe 8 through the normally open end of the second three-way valve 7.

[0116] (2) Water sample measurement: First, start the stirring assembly 44. Then, the second water pump 5 rotates forward to pump the water sample into the measuring tank 4 through the normally closed end of the first three-way valve 6. When the liquid level sensor 46 detects that the water level reaches the set water level, the second water pump 5 stops rotating. After a delay of 3 minutes, the detection electrode 45 transmits the detection data to the data acquisition unit 1, and the data acquisition unit 1 outputs the pH value measurement result of the water sample.

[0117] (3) Post-test cleaning: Turn on the stirring assembly 44, and after the second water pump 5 reverses for a set time, the test retained water sample is discharged from the waste water pipe 8 through the normally open ends of the first three-way valve 6 and the second three-way valve 7. Subsequently, open the cleaning valve for a period of time, and deliver the cleaning water to the measurement window of the detection electrode 45 through the cleaning pipe 43, and deliver the cleaning water to the pool wall through the upper cover 41 of the measuring pool 4, so as to fully remove the water sample residue on the electrode and the pool wall. Then, after the second water pump 5 reverses for a set time again, the cleaning water is discharged from the waste water pipe 8 through the normally open ends of the first three-way valve 6 and the second three-way valve 7. Open the cleaning valve again to deliver the cleaning water to the measuring pool 4, and close the cleaning valve when the liquid level sensor 46 detects that the water level has reached the set value.

[0118] Taking the turbidity detection of the standard solution as an example, the working process of this embodiment is described:

[0119] (1) Rinse before measurement: Turn on the stirring assembly 44, and after the second water pump 5 reverses for a set time, the standard liquid that may remain is discharged to the waste water pipe 8 through the normally open ends of the first three-way valve 6 and the second three-way valve 7. Then the first water pump 31 and the multi-way valve 32 are linked to first draw pure water into the measuring tank 4. When the liquid level sensor 46 detects that the water level reaches the set water level, the first water pump 31 stops rotating. Then the second water pump 5 reverses to discharge the pure water through the first three-way valve 6 and the second three-way valve 7 through the waste water pipe 8. After the discharge setting time, the second water pump 5 stops rotating. The multi-way valve 32 opens the standard liquid flow path and links with the first water pump 31, and then draws the standard liquid into the measuring tank 4. When the liquid level sensor 46 detects that the water level reaches the set water level, the first water pump 31 stops rotating. Finally, the second water pump 5 reverses to discharge the standard liquid through the first three-way valve 6 and the second three-way valve 7 through the waste liquid pipe 9.

[0120] (2) Standard solution measurement: After the magnetic stirrer 102 runs for a set time, the turbidity liquid in the measuring cup 101 is mixed, and then the stirring component 44 is turned on. Then the first water pump 31 and the multi-way valve 32 are linked to pump the standard solution into the measuring tank 4. When the liquid level sensor 46 detects that the water level reaches the set value, the first water pump 31 stops rotating. After a delay of 3 minutes, the detection electrode 45 transmits the measurement data to the data acquisition unit 1 and outputs the turbidity measurement result of the standard solution. Finally, the operation of the magnetic stirrer 102 is turned off.

[0121] (3) Post-test cleaning: Turn on the stirring assembly 44, and after the second water pump 5 reverses for a set time, the test retained standard sample is discharged through the normally open end of the first three-way valve 6 and the normally closed end of the second three-way valve 7 through the waste liquid pipe 9. Then, after the second air pump and the multi-way valve 32 are linked for a set time, the remaining turbidity standard liquid in the valve body and the pipeline is pushed back into the measuring cup 101. Finally, the first water pump 31 and the multi-way valve 32 are linked to pump pure water into the measuring tank 4. When the liquid level sensor 46 detects that the water level has reached the set value, the first water pump 31 stops running and turns off the stirring assembly 44.

[0122] In summary, through the cooperation of the data acquisition unit 1 and the measuring unit 2, the automatic quality control function is realized, which is helpful to improve the reliability and accuracy of the water quality monitoring results and avoid errors caused by human factors; the measuring pool 4 with a barrel-shaped structure with an outer circle and an inner cone is made of transparent organic glass material, which helps to provide good mechanical properties and is easy to observe and clean, thereby improving the stability of the system; through the linkage design of the cleaning valve and the first air blowing pipe and the second air blowing pipe, the cleaning effect can be enhanced to ensure the cleanliness of the measuring window, and the residual moisture can be blown dry by the first air pump to improve the accuracy of electrode detection; by adopting high speed, The second water pump 5 with a large flow design cooperates with the first three-way valve 6 and the second three-way valve 7 of the large-diameter clamp valve or solenoid valve to achieve rapid passage of water samples, prevent pipeline blockage, and improve operating efficiency; through the linkage of the first water pump 31, the multi-way valve 32 and the liquid level sensor 46, multiple tasks such as sample detection and volume determination can be performed simultaneously, effectively improving the versatility of the equipment; through the coordination of the magnetic external stirring system 10, it can not only effectively prevent corrosion but also ensure that the sample is fully mixed, thereby improving the accuracy of measurement; through the linkage of the first water pump 31 and the multi-way valve 32, specific solutions can be added to improve the sensitivity and service life of specific sensors.

[0123] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure 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 disclosure.

Claims

1. A water quality multi-parameter monitoring system with automatic quality control function, characterized in that: Including data acquisition unit and measurement unit, The measuring unit comprises a liquid inlet module, a measuring cell, a second water pump, a first three-way valve and a second three-way valve, wherein the liquid inlet module is used to add a standard liquid to a first port of the measuring cell, a common end of the first three-way valve is communicated with a second port of the measuring cell via a first pipeline, the second water pump is arranged on the first pipeline, a first end of the first three-way valve is used to access a water sample, a second end of the first three-way valve is connected to a common end of the second three-way valve, a first end of the second three-way valve is used to communicate with a waste water pipe, and a second end of the second three-way valve is used to communicate with a waste liquid pipe. The measuring cell is provided with a detection electrode, the detection electrode is used to detect the water sample or standard solution in the measuring cell, and the output end of the detection electrode is communicatively connected with the data acquisition unit; The upper cover of the measuring pool is provided with a water inlet and a plurality of first water flow channels, the first ends of the plurality of first water flow channels are all connected to the water inlet, the second ends of the plurality of first water flow channels are distributed along a first path, the first path is located at the bottom of the upper cover, and the extension direction of the first path is the same as the circumferential direction of the wall of the measuring pool; The upper cover of the measuring pool comprises a first layer, a second layer and a third layer which are sequentially arranged up and down, the first layer is provided with the water inlet, the second layer is provided with an annular second water flow channel, the third layer is provided with a plurality of water outlets, and the second water flow channel is connected with the plurality of the water outlets to form a plurality of the first water flow channels; The inner side and the outer side of the second water flow channel are both provided with an annular accommodating cavity, and the accommodating cavity is used to place a sealing ring; After the cleaning water enters from the water inlet of the upper cover, it is transported to the measuring window of the detection electrode through the cleaning pipe, and is transported to the pool wall through the first water flow channel to fully remove the water sample residue at the electrode and the pool wall.

2. The water quality multi-parameter monitoring system with automatic quality control function as claimed in claim 1, characterized in that: The liquid inlet module includes a first water pump and a multi-way valve, the common end of the multi-way valve is connected to the second port of the measuring cell through a second pipe, the first water pump is arranged on the second pipe, and the multiple branches of the multi-way valve are respectively used to connect multiple standard liquids.

3. The water quality multi-parameter monitoring system with automatic quality control function as claimed in claim 1, characterized in that: The upper cover of the measuring pool is provided with a water inlet, and a cleaning pipe is provided in the measuring pool. One end of the cleaning pipe is connected to the water inlet, and the other end of the cleaning pipe extends to the measuring window of the detection electrode.

4. The water quality multi-parameter monitoring system with automatic quality control function as claimed in claim 2, characterized in that: It also includes multiple groups of external stirring systems, and the output ends of the multiple groups of external stirring systems are respectively connected to the multiple branches of the multi-way valve.

5. The water quality multi-parameter monitoring system with automatic quality control function as claimed in claim 1, characterized in that: It also includes a first air pump, a first air blowing pipe and a controller, One end of the first air blowing tube is connected to the first air pump, and the other end of the first air pump faces the measuring window of the detection electrode. The controller is used to control the first air pump to open after each detection to dry the detection electrode.

6. The water quality multi-parameter monitoring system with automatic quality control function as claimed in claim 2, characterized in that: It also includes a second air pump, a second air blowing pipe and a controller. One end of the second air blowing pipe is connected to the second air pump, and the other end of the second air pump is connected to the corresponding branch of the multi-way valve. The controller is used to control the second air pump to open after each detection to dry the corresponding branch of the multi-way valve.

Images