Automatic underground water sampling system

Abstract

The invention provides an automatic underground water sampling system, and belongs to the technical field of water quality detection. The automatic underground water sampling system comprises a water quality detection pool, a water quality detection device, a water pumping device and a drainage pipeline are arranged in the water quality detection pool, and a first electric valve, a sample reserving device and a second electric valve are arranged on a pipeline between the drainage pipeline and the water quality detection pool; the controller is used for collecting detection data of various water quality parameters according to a first time period and determining first detection data; determining the fluctuation quantity of the multiple water quality parameters based on the first detection data; when the fluctuation quantity of any water quality parameter is larger than a first set threshold value, the first electric valve is controlled to be opened, and the second electric valve is controlled to be closed; when the fluctuation quantity of the various water quality parameters is smaller than a first set threshold value, the first electric valve is controlled to be closed, and the second electric valve is controlled to be opened, so that the water sample in the water quality detection pool is poured into the sample reserving device. The accuracy of an existing underground water sampling system can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water quality detection, and in particular to an automatic groundwater sampling system. Background Art

[0002] Groundwater is an important source of drinking water. By sampling and analyzing groundwater, we can determine whether there are harmful substances in the water, such as heavy metals, organic matter, bacteria and viruses, to ensure the safety of drinking water for residents. At the same time, groundwater is interconnected with surface water, soil and biological communities. Sampling groundwater helps to understand the impact of groundwater changes on the ecosystem.

[0003] The groundwater automatic sampling system can automatically sample groundwater on a regular basis, providing convenience for groundwater analysis. However, during each sampling, the water sample that has just entered the sampling system may contain impurities. Groundwater analysis based on water samples containing impurities will affect the accuracy of the analysis results. Summary of the invention The disclosed embodiment provides a groundwater automatic sampling system to solve the problem of inaccurate sampling in existing groundwater sampling systems.

[0004] The present disclosure provides an automatic groundwater sampling system, comprising: A water quality detection pool, wherein a water quality detection device is provided in the water quality detection pool, and the water quality detection device is used to detect a variety of water quality parameters; A pumping device, used for conveying water samples into the water quality testing pool; A drainage pipe, used to discharge the water sample in the water quality detection pool; a first electric valve is provided on the pipe between the drainage pipe and the water quality detection pool; A sample retaining device for storing water samples; a second electric valve is provided on the first pipeline between the sample retaining device and the water quality detection device; Controller for: Collecting detection data of a plurality of water quality parameters according to a first time period to determine first detection data; Determining fluctuation amounts of multiple water quality parameters based on the first detection data; When the fluctuation amount of any water quality parameter is greater than a first set threshold, the first electric valve is controlled to open and the second electric valve is controlled to close, so as to discharge the water sample in the water quality detection pool; When the fluctuation amounts of the various water quality parameters are all less than the first set threshold value, the first electric valve is controlled to be closed and the second electric valve is controlled to be opened, so that the water sample in the water quality detection pool is poured into the sample retaining device.

[0005] In an exemplary embodiment of the present disclosure, the controller is further configured to: The first time period is adjusted based on the amount of fluctuation of the plurality of water quality parameters.

[0006] In an exemplary embodiment of the present disclosure, the controller is further configured to: Determine a first count value based on fluctuations of multiple water quality parameters; the first count value is the number of first water quality parameters, and the first water quality parameter is a water quality parameter whose fluctuation is greater than a first set threshold; The first time period is adjusted based on the positive correlation between the first count value and the first time period.

[0007] In an exemplary embodiment of the present disclosure, there are multiple sample retaining devices, and the multiple sample retaining devices are connected to the water quality detection device through multiple first pipes respectively, and each of the first pipes is provided with a second electric valve.

[0008] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system further includes: The fixative storage device is connected to the sample retention device through a second pipeline, and a flow switch is arranged on the second pipeline.

[0009] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system further includes: A water quality flow trough, through which the water sample transported by the pumping device enters the water quality detection device; A third pipeline, wherein a first end of the third pipeline is connected to the inlet of the water quality detection pool, and a second end of the third pipeline is connected to the drainage pipeline; a first regulating valve is arranged on the third pipeline.

[0010] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system further includes: A liquid level detection device is arranged in the sample retaining device, and the liquid level detection device is connected to the controller.

[0011] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system further includes: A label is arranged on the outer shell of the sample retaining device, and the label is used to indicate the sample retaining position, sample retaining time and corresponding water quality detection device of the water sample in the sample retaining device.

[0012] In an exemplary embodiment of the present disclosure, the groundwater automatic sampling system further includes a monitoring platform, the monitoring platform is communicatively connected to a plurality of user terminals, the user terminals are used to input the second detection data of the water sample in the sample retention device, the sample retention location, the sample retention time and the corresponding water quality detection device; The monitoring platform is specifically used for: Determine the first detection data corresponding to the second detection data based on the sample retention position, sample retention time and the corresponding water quality detection device of the water sample in the sample retention device to obtain the third detection data; The detection accuracy of the water quality detection device is determined based on a comparison result of the second detection data and the third detection data.

[0013] In an exemplary embodiment of the present disclosure, the third detection data is the first detection data of the water quality detection device in a first time period; the first time period includes a second time period before the sample retention time and a third time period after the sample retention time; The monitoring platform is also specifically used for: Respectively calculating the average values ​​of the detection data of various water quality parameters in the third detection data; The average values ​​of the detection data of various water quality parameters in the third detection data are compared with the corresponding second detection data, and the detection accuracy of the water quality detection device is determined based on the comparison result.

[0014] The beneficial effects of the automatic groundwater sampling system provided by the embodiment of the present disclosure are: In the disclosed embodiment, the controller controls the pumping device to transport water samples into the water quality detection pool at a fixed time, and the water quality detection device detects multiple water quality parameters. Considering that the water sample just entering the water quality detection pool may contain impurities, the detection data of the water quality parameters fluctuates greatly. Therefore, the controller can collect the detection data of multiple water quality parameters according to the first time period to obtain the first detection data, and determine the fluctuation amount of multiple water quality parameters based on the first detection data. If the fluctuation amount of one or more water quality parameters is greater than the first set threshold, it indicates that the first detection data has not reached stability and the water sample has no characterization significance. At this time, the controller controls the first electric valve to open and the second electric valve to close, and the water sample in the water quality detection pool is discharged without retaining the water sample; when the fluctuation amount of multiple water quality parameters is less than the first set threshold, it indicates that the first detection data has reached stability. At this time, the first electric valve is controlled to close and the second electric valve is controlled to open, and the water sample in the water quality detection pool is poured into the sample retention device to realize automatic sampling of the water sample.

[0015] The disclosed embodiment determines the appropriate sample retention time by detecting the fluctuation of multiple water quality parameters, thereby avoiding the influence of impurities in the water sample at the initial sampling stage on the water sample analysis results, ensuring the accuracy of sampling, and avoiding the waste of water samples caused by long-term water sample discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a structural schematic diagram of a groundwater automatic sampling system provided by an embodiment of the present disclosure; In the figure: 1 water quality testing pool, 2 water quality testing device, 3 pumping device, 4 drainage pipe, 5 sample retention device, 6 first electric valve, 7 second electric valve, 8 waste liquid barrel, 9 water quality flow trough, 10 fixative storage device, 11 first regulating valve. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] The following is a detailed description of the implementation of the present disclosure in conjunction with the specific drawings: Figure 1 This is a schematic diagram of the structure of a groundwater automatic sampling system provided by an embodiment of the present disclosure. Figure 1 , the groundwater automatic sampling system comprises: A water quality detection pool 1 is provided with a water quality detection device 2 in the water quality detection pool 1. The water quality detection device 2 is used to detect a variety of water quality parameters; The pumping device 3 is used to transport water samples into the water quality testing pool 1 .

[0021] The drainage pipe 4 is used to discharge the water sample in the water quality detection tank 1 ; a first electric valve 6 is provided on the pipe between the drainage pipe 4 and the water quality detection tank 1 .

[0022] The sample retaining device 5 is used to store water samples; a second electric valve 7 is provided on the first pipeline between the sample retaining device 5 and the water quality detection device 2.

[0023] Controller for: The detection data of a plurality of water quality parameters are collected according to a first time period to determine first detection data.

[0024] The fluctuation amounts of the various water quality parameters are determined based on the first detection data of the water quality detection device 2 . When the fluctuation amount of any water quality parameter is greater than the first set threshold, the first electric valve 6 is controlled to be opened and the second electric valve 7 is controlled to be closed to discharge the water sample in the water quality detection pool 1 .

[0025] When the fluctuation amounts of the various water quality parameters are all less than the first set threshold, the first electric valve 6 is controlled to be closed and the second electric valve 7 is controlled to be opened, so that the water sample in the water quality detection pool 1 is poured into the sample retaining device 5 .

[0026] In this example, the water quality detection device 2 may include a variety of water quality detection sensors to detect various water quality parameters such as conductivity, pH value, dissolved oxygen, ORP, etc. The pumping device 3 may use an airbag pump, which has less disturbance to the water sample during the sampling process and can better maintain the original state of the water sample; at the same time, due to its special structure and working principle, it reduces the possibility of external pollutants entering the water sample during the sampling process, ensuring the purity of the water sample; in addition, the pumping action of the airbag pump is relatively gentle, which reduces the impact and extrusion of particles, thereby reducing the probability of particles gathering and clogging in the pipeline.

[0027] The sample retention device 5 can be in the form of a sample retention bottle, which is a polytetrafluoroethylene bottle placed in a constant temperature box to ensure that the water sample data does not change due to the external environment. A micro-motion sensor can be installed on the sample retention bottle to realize automatic positioning of the sample position, record information such as sample filling time, detection time, and opening time, and use ultra-low power consumption. The longest standby time can reach 15 days (calculated from the time the sample is taken away). When sampling, you only need to enter the sample retention bottle number, trigger the sample retention bottle with the positioning recording function, automatically obtain the sample retention bottle position, and then take the sample. This sample retention bottle can effectively prevent the sample from being damaged during transportation, causing the sample to be dumped or the sample to be lost. This design uses a micro-motion sensor and a number display to enable the sample retention bottle to realize the automatic trigger positioning and numbering function, effectively ensuring the timeliness, representativeness and traceability of the sample, as well as the accuracy of the test results, and avoiding problems such as sample fraud or failure due to human intervention.

[0028] The fluctuation amount of the water quality parameter is used to characterize the change of the detection data corresponding to the water quality parameter. In this embodiment, the change curves of various water quality parameters can be drawn based on the detection data corresponding to various water quality parameters in the first detection data, and the difference between the peak and the trough of each change curve within the first set time is determined as the fluctuation amount of the corresponding water quality parameter. The first set time can be set according to actual needs.

[0029] In this example, the controller controls the pumping device 3 to transport water samples into the water quality detection pool 1 at a fixed time, and the water quality detection device 2 detects multiple water quality parameters to obtain the first detection data. Considering that the water sample just entering the water quality detection pool 1 may contain impurities, the detection data of the water quality parameters fluctuates greatly. Therefore, the controller can collect the detection data of multiple water quality parameters according to the first time period to obtain the first detection data, and determine the fluctuation amount of multiple water quality parameters based on the first detection data. If the fluctuation amount of one or more water quality parameters is greater than the first set threshold, it indicates that the first detection data has not reached stability, and the water sample at this time has no characterization significance. The controller controls the first electric valve 6 to open and the second electric valve 7 to close, and the water sample in the water quality detection pool 1 is discharged to the waste liquid bucket 8; when the fluctuation amount of multiple water quality parameters is less than the first set threshold, it indicates that the first detection data has reached stability. At this time, the first electric valve 6 is controlled to close and the second electric valve 7 is controlled to open, and the water sample in the water quality detection pool 1 is poured into the sample retention device 5 to realize automatic sampling of the water sample.

[0030] The disclosed embodiment determines the appropriate sample retention time by detecting the fluctuation of multiple water quality parameters, thereby avoiding the influence of impurities in the water sample at the initial sampling stage on the water sample analysis results, ensuring the accuracy of sampling, and avoiding the waste of water samples caused by long-term water sample discharge.

[0031] In addition, through the setting of the water quality detection device 2, the first electric valve 6 and the second electric valve 7, various automatic sampling can be achieved, including: mixed sampling, parallel sampling, retaining samples when exceeding the standard, time proportional sampling, flow proportional sampling, etc., and water quality exceeding the standard alarm can also be realized.

[0032] In an exemplary embodiment of the present disclosure, the controller is further configured to: The first time period is adjusted based on the amount of fluctuation in the plurality of water quality parameters.

[0033] In this embodiment, the first time period can be further adjusted based on the fluctuation amount of multiple water quality parameters. For example, as the controller collects more and more detection data of multiple water quality parameters, the fluctuation amount of multiple water quality parameters gradually decreases. At this time, the first time period can be reduced to quickly determine the moment when the fluctuation amount of multiple water quality parameters is less than the first set threshold value, and open the second electric valve 7 as soon as possible to retain the sample to avoid the waste of water sample caused by long-term discharge of water sample into the waste liquid barrel 8.

[0034] In an exemplary embodiment of the present disclosure, the controller is further configured to: The first count value is determined based on the fluctuations of multiple water quality parameters; the first count value is the number of first water quality parameters, and the first water quality parameter is a water quality parameter whose fluctuation is greater than a first set threshold.

[0035] The first time period is adjusted based on the positive correlation between the first count value and the first time period.

[0036] In this embodiment, a specific implementation method for adjusting the first time period based on the fluctuation of multiple water quality parameters is provided. The number of first water quality parameters (i.e., water quality parameters with fluctuations greater than the first set threshold) can be accumulated by setting the first count value. The larger the first count value, the more water quality parameters with fluctuations greater than the first set threshold, the more unstable the first detection data, and the longer the first time period can be set to avoid the collection of too much invalid data; the smaller the first count value, the fewer water quality parameters with fluctuations greater than the first set threshold, the more stable the first detection data tends to be, and the shorter the first time period can be set, so as to determine the moment when the fluctuations of multiple water quality parameters are less than the first set threshold as soon as possible on the basis of ensuring the stability of the first detection data, and open the second electric valve 7 as soon as possible to retain samples. Therefore, the first time period can be adjusted based on the positive correlation between the first count value and the first time period.

[0037] In an exemplary embodiment of the present disclosure, the process of adjusting the first time period based on the positive correlation between the first count value and the first time period can be described in detail as follows: If the first count value is greater than the first value, the first time period is multiplied by the first adjustment parameter to obtain an adjusted first time period.

[0038] If the first count value is between the first value and the second value, the first time period is multiplied by the second adjustment parameter to obtain an adjusted first time period.

[0039] If the first count value is less than the second value, the first time period is multiplied by the third adjustment parameter to obtain the adjusted first time period. The first adjustment parameter, the second adjustment parameter and the third adjustment parameter are decreased in sequence.

[0040] In this embodiment, by segmenting the first count value and setting corresponding adjustment parameters for each segment, the first time period can be adjusted according to the fluctuation amount of multiple water quality parameters. The calculation process is simple and easy to implement.

[0041] In an exemplary embodiment of the present disclosure, the process of adjusting the first time period based on the positive correlation between the first count value and the first time period can be described in detail as follows: determining a fourth adjustment parameter based on the first count value and the total number of types of water quality parameters; The first time period is multiplied by the fourth adjustment parameter to obtain an adjusted first time period.

[0042] In this embodiment, the total number of types of water quality parameters that the water quality detection device 2 can detect is set according to actual needs. For example, the water quality parameters that the water quality detection device 2 can detect are conductivity, pH value, dissolved oxygen, ORP, chemical oxygen demand, biochemical oxygen demand, and nitrogen compounds. The total number of types of water quality parameters is equal to 7. Assuming that the three water quality parameters of conductivity, pH value, and dissolved oxygen have reached stability, and the four water quality parameters of ORP, chemical oxygen demand, biochemical oxygen demand, and nitrogen compounds have not reached stability (that is, the first count value is 4), the fourth adjustment parameter is 4 / 7. On the basis of obtaining the fourth adjustment parameter, the first time period is multiplied by the fourth adjustment parameter to obtain the adjusted first time period.

[0043] In this embodiment, the fourth adjustment parameter is determined based on the first count value and the total number of types of water quality parameters, so that the first time period can change in real time following the change of the first count value, thereby achieving fine adjustment of the first time period.

[0044] In an exemplary embodiment of the present disclosure, there are multiple sample retaining devices 5, and the multiple sample retaining devices 5 are connected to the water quality detection device 2 through multiple first pipes respectively, and each first pipe is provided with a second electric valve 7.

[0045] In this embodiment, the sample retention device 5 can be set to multiple, and multiple sample retention devices 5 are set in parallel to achieve parallel sampling of the same water sample, which can be used to analyze the accuracy and repeatability of the test process. If problems are found later or traceability is required, the parallel sampling can provide original samples, which is helpful to find the cause and solve the problem. Multiple sample retention devices 5 are independently controlled by multiple second electric valves 7, which is conducive to achieving accurate control of the sample retention amount in each sample retention device 5.

[0046] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system further includes: The fixative storage device 10 is connected with the sample retaining device 5 through a second pipeline, and a flow switch is arranged on the second pipeline.

[0047] In this embodiment, a fixative can be added to the sample retaining device 5 to ensure that the water sample maintains its original chemical composition and properties before analysis, thereby improving the accuracy and reliability of the test results. Specifically, the fixative storage device 10 can be connected to the inlet end of the sample retaining device 5 through a second pipeline, and the water sample and the fixative enter the sample retaining device 5 at the same time to fully mix the water sample and the fixative. The fixative is injected through a high-precision peristaltic pump and a flow switch to strictly control the addition ratio of the fixative.

[0048] In an exemplary embodiment of the present disclosure, the water sample and the fixative may enter a simple sample mixing device so that the water sample and the fixative are fully and evenly mixed to maximize the effect of the fixative.

[0049] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system further includes: The water quality flow slot 9 , through which the water sample transported by the pumping device 3 enters the water quality detection device 2 .

[0050] The third pipeline, the first end of the third pipeline is connected to the inlet of the water quality detection pool 1, and the second end of the third pipeline is connected to the drainage pipeline 4; the third pipeline is provided with a first regulating valve 11.

[0051] In this embodiment, a water quality flow channel 9 is set in the water quality detection pool 1, so that the water sample can pass through at a relatively stable flow rate, pressure and flow direction, providing suitable working conditions for the water quality detection device 2 and ensuring that the sensor can accurately detect various parameters of the water sample.

[0052] In addition, in order to adjust the water distribution of the pumping device 3, a third pipe can be set at the inlet of the water quality detection pool 1, the inlet of the water quality detection pool 1 is connected to the drainage pipe 4, and a first regulating valve 11 is set on the third pipe. When the water sample pumped out by the pumping device 3 is too much, the first regulating valve 11 is opened to discharge the excess water sample to the waste liquid barrel 8 through the third pipe to ensure the stable working condition in the water quality detection pool 1. Among them, the first regulating valve 11 can be adjusted manually.

[0053] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system further includes: A liquid level detection device is provided in the sample retaining device 5, and the liquid level detection device is connected to the controller.

[0054] In this embodiment, a liquid level detection device is also provided in the sample retention device 5. When the water level reaches a set position, the liquid level detection device outputs a corresponding trigger signal to the controller. After receiving the trigger signal, the controller controls the second electric valve 7 to close and stop filling. Therefore, the setting of the liquid level detection device can realize accurate filling of water samples.

[0055] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system further includes: A label is provided on the outer shell of the sample retaining device 5 , and the label is used to indicate the sample retaining position, sample retaining time and corresponding water quality detection device 2 of the water sample in the sample retaining device 5 .

[0056] In this embodiment, a label can be set on the housing of the sample retention device 5. The label can be in the form of a barcode, a two-dimensional code or an electronic label, and the sample retention position, sample retention time and the corresponding water quality detection device 2 of the water sample in the sample retention device 5 are stored in the label in a coded manner. The sample retention position, sample retention time and the corresponding water quality detection device 2 of the water sample in the sample retention device 5 can be obtained by scanning the barcode, the two-dimensional code or reading the electronic label, so as to facilitate the tracing of the water sample.

[0057] In an exemplary embodiment of the present disclosure, the automatic groundwater sampling system also includes a monitoring platform, which is communicatively connected to multiple user terminals, and the user terminals are used to input the second detection data, sample retention location, sample retention time and corresponding water quality detection device 2 of the water sample in the sample retention device 5.

[0058] The monitoring platform is specifically used for: Based on the sample retention position and the sample retention time of the water sample in the sample retention device 5 and the corresponding water quality detection device 2, the first detection data corresponding to the second detection data is determined to obtain the third detection data.

[0059] The detection accuracy of the water quality detection device 2 is determined based on the comparison result of the second detection data and the third detection data.

[0060] In this embodiment, the controller is also connected to the monitoring platform for communication. The controller can upload the detection data of various water quality parameters of the water sample to the monitoring platform via GPRS. The user can also read and set the basic parameters of the water quality detection device 2 through the monitoring platform (such as a cloud platform) to realize smart Internet of Things and smart sampling.

[0061] The water sample in the sample retention device 5 is sent to the corresponding laboratory for more detailed analysis and testing to obtain a second test result. The laboratory staff can upload the second test result and its corresponding sample retention location, sample retention time and water quality testing device 2 to the monitoring platform to realize the sharing of water quality testing data.

[0062] Preferably, the first detection data (i.e., the third detection data) with the same sampling position and the same sampling time can also be selected based on the sampling position, sampling time and corresponding water quality detection device 2 of the water sample in the sampling device 5, and the third detection data and the second detection data can be compared. If the error between the two is small (for example, less than the second set threshold), it indicates that the water quality detection device 2 is operating well. Otherwise, if the error between the third detection data and the second detection data is large (for example, greater than the second set threshold), it indicates that the detection accuracy of the water quality detection device 2 is low, and the staff needs to be reminded to perform calibration in time.

[0063] From the above analysis, it can be seen that this embodiment can promptly discover problems with the water quality detection device 2 by comparing the second detection data with the corresponding first detection data, remind the staff to take timely measures, and thus ensure the accuracy of the entire water sample collection system.

[0064] In an exemplary embodiment of the present disclosure, the third detection data is the first detection data of the water quality detection device 2 within a first time period; the first time period includes a second time period before the sample retention time and a third time period after the sample retention time.

[0065] The monitoring platform is also used for: The average values ​​of the detection data of various water quality parameters in the third detection data are calculated respectively.

[0066] The average values ​​of the detection data of various water quality parameters in the third detection data are compared with the corresponding second detection data, and the detection accuracy of the water quality detection device 2 is determined based on the comparison result. In this embodiment, a section of data within a second set time (including the second time period and the third time period) before and after the sample retention time can be intercepted from the first detection data as the third detection data, and the average value of the detection data of various water quality parameters in the third detection data is calculated, and the average value of the detection data of various water quality parameters is compared with the second detection data. For example, the average value of the detection data corresponding to the conductivity parameter in the third detection data is compared with the detection data corresponding to the conductivity parameter in the second detection data. If the error between the two is small (for example, less than the second set threshold), it indicates that the detection data corresponding to the conductivity parameter in the third detection data has high accuracy, and the water quality detection device 2 operates well. Otherwise, if the error between the average value of the detection data corresponding to the conductivity parameter in the third detection data and the detection data corresponding to the conductivity parameter in the second detection data is large (greater than the second set threshold), it indicates that the detection data corresponding to the conductivity parameter in the third detection data has low accuracy, and it is necessary to remind the staff to calibrate the conductivity detection sensor in time.

[0067] In this embodiment, a section of data within a second set time before and after the sample retention time is intercepted as the first detection data corresponding to the second detection data, and the average value of the detection data within the time period is calculated. The average value can comprehensively reflect the overall level of the first detection data. Comparing the average value with the second detection data is conducive to achieving an objective evaluation of the first detection data and truly reflecting the working status of the water quality detection device 2.

[0068] 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 groundwater automatic sampling system, characterized in that: include: A water quality detection pool, wherein a water quality detection device is provided in the water quality detection pool, and the water quality detection device is used to detect a variety of water quality parameters; A pumping device, used for conveying water samples into the water quality testing pool; A drainage pipe, used to discharge the water sample in the water quality detection pool; a first electric valve is provided on the pipe between the drainage pipe and the water quality detection pool; A sample retaining device for storing water samples; a second electric valve is provided on the first pipeline between the sample retaining device and the water quality detection device; Controller for: Collecting detection data of a plurality of water quality parameters according to a first time period to determine first detection data; Determining fluctuation amounts of multiple water quality parameters based on the first detection data; When the fluctuation amount of any water quality parameter is greater than a first set threshold, the first electric valve is controlled to open and the second electric valve is controlled to close, so as to discharge the water sample in the water quality detection pool; When the fluctuation amounts of the various water quality parameters are all less than the first set threshold value, the first electric valve is controlled to be closed and the second electric valve is controlled to be opened, so that the water sample in the water quality detection pool is poured into the sample retaining device.

2. The automatic groundwater sampling system according to claim 1, characterized in that: The controller is also used for: The first time period is adjusted based on the amount of fluctuation of the plurality of water quality parameters.

3. The automatic groundwater sampling system according to claim 2, characterized in that: The controller is also specifically used for: Determine a first count value based on fluctuations of multiple water quality parameters; the first count value is the number of first water quality parameters, and the first water quality parameter is a water quality parameter whose fluctuation is greater than a first set threshold; The first time period is adjusted based on the positive correlation between the first count value and the first time period.

4. The automatic groundwater sampling system according to claim 1, characterized in that: There are multiple sample retaining devices, and the multiple sample retaining devices are connected to the water quality detection device through multiple first pipelines respectively, and each of the first pipelines is provided with a second electric valve.

5. The automatic groundwater sampling system according to claim 1, characterized in that: Also includes: The fixative storage device is connected to the sample retention device through a second pipeline, and a flow switch is arranged on the second pipeline.

6. The automatic groundwater sampling system according to claim 1, characterized in that: Also includes: A water quality flow trough, through which the water sample transported by the pumping device enters the water quality detection device; A third pipeline, wherein a first end of the third pipeline is connected to the inlet of the water quality detection pool, and a second end of the third pipeline is connected to the drainage pipeline; a first regulating valve is arranged on the third pipeline.

7. The automatic groundwater sampling system according to claim 1, characterized in that: Also includes: A liquid level detection device is arranged in the sample retaining device, and the liquid level detection device is connected to the controller.

8. The automatic groundwater sampling system according to claim 1, characterized in that: Also includes: A label is arranged on the outer shell of the sample retaining device, and the label is used to indicate the sample retaining position, sample retaining time and corresponding water quality detection device of the water sample in the sample retaining device.

9. The automatic groundwater sampling system according to claim 1, characterized in that: It also includes a monitoring platform, which is communicatively connected to a plurality of user terminals, and the user terminals are used to input the second detection data of the water sample in the sample retention device, the sample retention location, the sample retention time, and the corresponding water quality detection device; The monitoring platform is specifically used for: Determine the first detection data corresponding to the second detection data based on the sample retention position, sample retention time and the corresponding water quality detection device of the water sample in the sample retention device to obtain the third detection data; The detection accuracy of the water quality detection device is determined based on a comparison result of the second detection data and the third detection data.

10. The automatic groundwater sampling system according to claim 9, characterized in that: The third detection data is the first detection data of the water quality detection device in the first time period; the first time period includes the second time period before the sample retention time and the third time period after the sample retention time; The monitoring platform is also specifically used for: Respectively calculating the average values ​​of the detection data of various water quality parameters in the third detection data; The average values ​​of the detection data of various water quality parameters in the third detection data are compared with the corresponding second detection data, and the detection accuracy of the water quality detection device is determined based on the comparison result.

Images