Flow path cleaning system and method for traceability instrument equipment

Abstract

The invention relates to the technical field of water quality detection equipment maintenance, and discloses a flow path cleaning system and method for traceability instrument equipment. The flow path cleaning system comprises a clear water tank, a booster pump, a ball valve assembly, a grit chamber, a water intake, a three-way ball valve, a diaphragm pump, a pressure sensor, a filter module, a first sample cup, a peristaltic pump assembly, a second sample cup, a flow cell, a pinch valve, a first electromagnetic three-way valve, a pure water tank, a waste liquid pipe, an air compressor, a second electromagnetic three-way valve and a washing liquid barrel. The water quality fingerprint traceability instrument can effectively remove silt, suspended solids and water sample impurities remaining in the flow path, meanwhile, through air purging, residual moisture is eliminated, bacterial colonies and algae breeding is inhibited, the accuracy of the detection result of the traceability instrument is guaranteed, the manual maintenance cost is reduced, and the water quality fingerprint traceability instrument is suitable for daily cleaning and maintenance of water quality fingerprint traceability instrument equipment.

Description

Technical Field

[0001] This application relates to the technical field of water quality testing equipment maintenance, and in particular to a flow path cleaning system and method for a traceability instrument. Background Technology

[0002] Source tracers are specialized environmental monitoring instruments, such as water pollution monitoring instruments, and are widely used in environmental monitoring, food safety, and pharmaceutical testing. They use precise spectral analysis technology to help identify components or pollutants in samples and determine their sources. The key function of source tracers is to acquire spectral data of samples in real time, thereby providing accurate analysis results and supporting various monitoring and testing tasks.

[0003] Regular cleaning of the tracer is crucial because the equipment is susceptible to contamination during long-term use, especially when analyzing complex samples. Residues or contaminants may accumulate inside the instrument; contaminants can not only affect measurement accuracy but also distort spectral data, thus impacting the final analytical results.

[0004] Currently, in the field of water quality source tracing and testing, the detection accuracy of three-dimensional fluorescent fingerprint source tracing equipment is directly related to the cleanliness of the flow path; however, existing technologies have the following problems: (1) Existing cleaning methods only clean the independent sub-units such as the water sampling unit, pretreatment unit or detection unit of the tracer separately, without forming a cleaning system that covers the entire flow path of the equipment. This results in pollutants easily remaining at the flow path connection, leading to poor sludge removal effect and affecting subsequent test results. (2) Existing flow path cleaning methods lack targeted drying and antibacterial design. After cleaning, moisture is easily left in the flow path, which provides conditions for the growth of bacteria and algae. Long-term use will lead to deviation in detection data and reduce the accuracy of equipment detection. (3) Due to incomplete cleaning and lack of automated cleaning mechanism, the equipment needs to be disassembled and maintained manually frequently, which not only increases manpower consumption, but may also damage equipment parts due to improper maintenance operations, thus shortening the service life of the equipment. Summary of the Invention

[0005] To address the problem that incomplete cleaning and the lack of automated cleaning mechanisms require frequent manual disassembly and maintenance of equipment, which not only increases manpower consumption but may also damage equipment components and shorten equipment lifespan due to improper maintenance operations, this application provides a flow path cleaning system and method for traceability instruments.

[0006] In a first aspect, this application provides a flow path cleaning system for a traceability instrument, which includes: a clean water tank, a booster pump, a ball valve assembly, a sedimentation tank, a water inlet, a three-way ball valve, a diaphragm pump, a pressure sensor, a filter module, a first sample cup, a peristaltic pump assembly, a second sample cup, a flow cell, a pinch valve, a first electromagnetic three-way valve, a pure water tank, a waste liquid pipe, an air compressor, a second electromagnetic three-way valve, and a washing liquid tank; The clear water tank is connected to the ball valve assembly via a booster pump, and the ball valve assembly is connected to the grit chamber via a pipeline. The grit chamber is equipped with a water inlet, which is connected to the diaphragm pump and pure water tank via a three-way ball valve. The pure water tank is connected to the first electromagnetic three-way valve via a pipeline. The diaphragm pump is connected to the filter module pipeline via a pressure sensor, and the filter module is connected to the first sample cup, the second sample cup, and the first electromagnetic three-way valve pipeline via a peristaltic pump assembly. The three ports of the second electromagnetic three-way valve are respectively connected to the second sample cup, the peristaltic pump assembly, and the flow cell through pipelines; The bottom of the sedimentation tank, the first sample cup, the second sample cup, and the flow cell are all connected to the waste liquid pipe via ball valve assemblies.

[0007] Optionally, the ball valve assembly includes a first ball valve, a second ball valve, a third ball valve, a fourth ball valve, and a pinch valve; The first ball valve is connected to the booster pump and the sedimentation tank via pipelines at both ends. The two ends of the second ball valve are connected to the grit chamber and the waste liquid pipe respectively through pipelines; The two ends of the third ball valve are connected to the first sample cup and the waste liquid pipe respectively through pipelines; The two ends of the fourth ball valve are connected to the second sample cup and the waste liquid pipe respectively through pipelines; The two ends of the pinch valve are connected to the flow tank and the waste liquid pipe respectively through pipelines; The peristaltic pump assembly includes a first peristaltic pump, a second peristaltic pump, and a third peristaltic pump; The two ends of the first peristaltic pump are connected to the first sample cup and the second sample cup respectively through pipelines; The two ends of the second peristaltic pump are connected to the second sample cup and the first solenoid three-way valve respectively through pipelines; The two ends of the third peristaltic pump are connected to the flow tank and the second solenoid three-way valve respectively through pipelines; The bottom of the second electromagnetic three-way valve is equipped with a washing liquid tank.

[0008] Optionally, the flow tank contains a cleaning solution, which includes a sodium hypochlorite solution with a mass concentration of 0.5%-1% or a citric acid solution with a mass concentration of 0.5%-1%.

[0009] Optionally, the sedimentation tank is equipped with jet pipes to generate fan-shaped or solid cone-shaped jets to expand the cleaning coverage area.

[0010] Optionally, the high-pressure side piping of the filter module uses PVC piping; the low-pressure side piping of the filter module uses polytetrafluoroethylene piping. The inner diameter of the polytetrafluoroethylene (PTFE) pipe is 2mm-5mm.

[0011] Secondly, this application also provides a method for cleaning the flow path of a traceability device, the method comprising the following steps: S1. After the tracer completes the water sample test, open the ball valve assembly to allow the water samples in the sedimentation tank, the first sample cup, and the second sample cup to be naturally drained by gravity; at the same time, start the third peristaltic pump to drain the water sample in the flow tank, and stop after 1 minute. S2. Open the first ball valve and start the booster pump to inject the cleaning water in the clear water tank into the grit chamber through the spray pipe to flush away solid impurities; at the same time, open the second ball valve to discharge the sewage through the waste liquid pipe. S3. Switch the three-way ball valve to the pure water tank flow path, start the diaphragm pump to draw pure water, and rinse the first sample cup after it flows through the filter module; after 2 minutes, close the third ball valve at the bottom, and stop the diaphragm pump after the liquid level sensor is triggered; then start the first peristaltic pump to transfer the pure water rinsing solution in the first sample cup to the second sample cup at a flow rate of 300 mL / min, continue for 1.5 minutes and then stop, and repeat the cycle 3 times; S4. Switch the first electromagnetic three-way valve to the pure water tank flow path, start the second peristaltic pump to inject pure water into the second sample cup at a flow rate of 300 mL / min; close the fourth ball valve at the bottom after 1 minute, and stop the second peristaltic pump after the liquid level sensor is triggered; then start the third peristaltic pump to deliver the pure water in the second sample cup to the flow cell at a flow rate of 200 mL / min, continue for 1 minute and then stop, and repeat the cycle 3 times. S5. Keep the ball valve at the bottom of the sample cup open, start the air compressor to dry the sample cup through the air inlet at the top of the sample cup, and stop after 1 minute; then close all the ball valves at the bottom of the sample cup. S6. Switch the first solenoid three-way valve to the air path, start the second peristaltic pump and run it for 2 minutes to inject air into the flow cell for purging; then stop the peristaltic pump and close the clamp valve; S7. When periodic deep cleaning is required or the spectral verification fails, switch the flow path to inject the special cleaning solution into the flow cell and let it stand to react. After completion, drain the solution and perform the residue removal operation. S8. Inject pure water into the flow tank and perform a three-dimensional fluorescence spectral scan. After data processing, calculate the comprehensive pollution index. If the comprehensive pollution index value is lower than or equal to the preset threshold, the cleaning is deemed qualified; otherwise, repeat step S7.

[0012] Optionally, the flow path is switched to inject a special cleaning solution into the flow-through tank and allowed to stand for reaction. After completion, the tank is emptied and a residue removal operation is performed, including the following steps: S71. Switch the second solenoid three-way valve to connect the third peristaltic pump and the washing liquid tank, and open the clamp valve. S72. Start the third peristaltic pump and run it at a flow rate of 200 mL / min for 1 minute. Then stop the third peristaltic pump, close the clamp valve, and let it stand for 0.5 to 1 hour. S73. Switch the second solenoid three-way valve to connect the third peristaltic pump and the waste liquid pipe, and open the clamp valve; S74. Start the third peristaltic pump and run it at a flow rate of 200 mL / min for 1 minute to discharge the waste liquid in the flow tank and pipeline into the waste liquid pipe.

[0013] Optionally, pure water is injected into the flow tank and a three-dimensional fluorescence spectroscopy scan is performed. After data processing, the comprehensive pollution index is calculated. If the comprehensive pollution index value is lower than or equal to a preset threshold, the cleaning is deemed qualified; otherwise, step S7 is repeated, including the following steps: S81. Inject pure water into the flow cell and start the fluorescence spectrometer to perform a three-dimensional scan to obtain the background fluorescence spectrum dataset. S82. Preprocess the spectral dataset to remove noise and interference, and calculate multiple preset spectral feature parameters; S83. Based on spectral characteristic parameters, the weights are dynamically adjusted by combining the coefficient of variation, and the environmental impact is corrected by multivariate regression to generate a comprehensive pollution index. S84. Compare the comprehensive pollution index with the preset qualified threshold; if the index is less than the preset qualified threshold, the cleaning is deemed qualified and the process is terminated; if it is higher than the preset qualified threshold, a control command is generated to drive the system to re-execute step S7.

[0014] Optionally, the comprehensive pollution index is generated by dynamically adjusting the weights based on spectral characteristic parameters and the coefficient of variation, and then correcting for environmental impact through multivariate regression, including the following steps: S831. Based on the historical cleanroom database, standardize the spectral characteristic parameters to obtain a standardized feature set; simultaneously collect feature measurement errors and environmental temperature drift data to obtain error data and environmental parameters; S832. Based on the standardized feature set, a dynamic weight is assigned to each feature using a coefficient of variation feedback mechanism to obtain a dynamic weight set; the anomaly detection algorithm is executed in parallel to obtain anomaly scores, and the confidence level of this calculation is evaluated to obtain the confidence score; S833 integrates standardized feature sets, dynamic weight sets, anomaly scores, confidence levels, error data, and environmental parameters, and performs comprehensive calculations using a multivariate fusion formula to generate a comprehensive pollution index.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. This application can effectively remove residual silt, suspended solids and water sample impurities in the flow path, while eliminating residual moisture through air purging, inhibiting the growth of bacteria and algae, ensuring the accuracy of the traceability instrument's test results, reducing manual maintenance costs, and is suitable for the daily cleaning and maintenance of water quality fingerprint traceability instrument equipment.

[0016] 2. This application effectively removes impurities and contaminants from the flow path through a combination of physical rinsing, pure water rinsing, and air drying, along with precise spectral scanning and comprehensive contamination index calculation, ensuring the accuracy and reliability of measurement results. Furthermore, it achieves an efficient and automated cleaning and verification process through dynamic weight adjustment, anomaly detection, and environmental correction.

[0017] 3. This application ensures the accuracy and reliability of the comprehensive pollution index through standardized processing, coefficient of variation weighting, anomaly detection, and environmental correction, thereby effectively determining whether the cleaning is qualified. It has a high degree of automation, can provide real-time feedback and optimize the cleaning process, and improves the efficiency and accuracy of equipment maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the system structure in this application.

[0019] Figure 2 This is a flowchart of the method in this application.

[0020] Reference numerals: 1. Clear water tank; 2. Booster pump; 3. First ball valve; 4. Jet fitting; 5. Sedimentation tank; 6. Second ball valve; 7. Water inlet; 8. Three-way ball valve; 9. Diaphragm pump; 10. Pressure sensor; 11. Filter module; 12. First sample cup; 13. First peristaltic pump; 14. Second sample cup; 15. Second peristaltic pump; 16. Third peristaltic pump; 17. Flow cell; 18. Pinch valve; 19. First solenoid three-way valve; 20. Pure water tank; 21. Waste liquid pipe; 22. Air compressor; 23. Third ball valve; 24. Fourth ball valve; 25. Second solenoid three-way valve; 26. Washing solution tank. Detailed Implementation

[0021] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0022] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] The first embodiment of this application discloses a flow path cleaning system for a traceability device, referring to... Figure 1 The flow path cleaning system includes: a clean water tank 1, a booster pump 2, a ball valve assembly, a sedimentation tank 5, a water inlet 7, a three-way ball valve 8, a diaphragm pump 9, a pressure sensor 10, a filter module 11, a first sample cup 12, a peristaltic pump assembly, a second sample cup 14, a flow cell 17, a pinch valve 18, a first electromagnetic three-way valve 19, a pure water tank 20, a waste liquid pipe 21, an air compressor 22, a second electromagnetic three-way valve 25, and a washing liquid tank 26. Clear water tank 1 is connected to ball valve assembly pipeline via booster pump 2, and ball valve assembly is connected to grit chamber 5 via pipeline; grit chamber 5 is equipped with water inlet 7 inside, and water inlet 7 is connected to diaphragm pump 9 and pure water tank 20 via three-way ball valve 8, and pure water tank 20 is connected to first electromagnetic three-way valve 19 via pipeline. The diaphragm pump 9 is connected to the filter module 11 via the pressure sensor 10. The filter module 11 is connected to the first sample cup 12, the second sample cup 14 and the first electromagnetic three-way valve 19 via the peristaltic pump assembly. The three ports of the second electromagnetic three-way valve 25 are respectively connected to the second sample cup 14, the peristaltic pump assembly and the flow cell 17 through pipelines. The bottom ends of the sedimentation tank 5, the first sample cup 12, the second sample cup 14, and the flow cell 17 are all connected to the waste liquid pipe 21 via ball valve assemblies.

[0024] Preferably, the ball valve assembly includes a first ball valve 3, a second ball valve 6, a third ball valve 23, a fourth ball valve 24, and a pinch valve 18; The first ball valve 3 is connected to the booster pump 2 and the sedimentation tank 5 through pipelines at both ends; The two ends of the second ball valve 6 are connected to the sedimentation tank 5 and the waste liquid pipe 21 respectively through pipelines; The two ends of the third ball valve 23 are connected to the first sample cup 12 and the waste liquid pipe 21 respectively through pipelines; The two ends of the fourth ball valve 24 are connected to the second sample cup 14 and the waste liquid pipe 21 respectively through pipelines; The two ends of the pinch valve 18 are connected to the flow tank 17 and the waste liquid pipe 21 respectively through pipelines; The peristaltic pump assembly includes a first peristaltic pump 13, a second peristaltic pump 15, and a third peristaltic pump 16; The two ends of the first peristaltic pump 13 are connected to the first sample cup 12 and the second sample cup 14 respectively through pipelines; The two ends of the second peristaltic pump 15 are connected to the second sample cup 14 and the first electromagnetic three-way valve 19 respectively through pipelines; The two ends of the third peristaltic pump 16 are connected to the flow tank 17 and the second electromagnetic three-way valve 25 respectively through pipelines; The bottom of the second electromagnetic three-way valve 25 is equipped with a washing liquid tank 26.

[0025] Preferably, the flow tank 17 is filled with a cleaning solution, which includes a sodium hypochlorite solution with a mass concentration of 0.5%-1% or a citric acid solution with a mass concentration of 0.5%-1%.

[0026] Preferably, the sedimentation tank 5 is provided with a jet pipe 4, which is used to generate a fan-shaped jet or a solid cone-shaped jet to expand the cleaning coverage area.

[0027] Preferably, the high-pressure side pipeline of the filter module 11 is made of PVC pipeline; the low-pressure side pipeline of the filter module 11 is made of polytetrafluoroethylene pipeline. The inner diameter of the polytetrafluoroethylene (PTFE) pipe is 2mm-5mm.

[0028] It should be explained that a booster pump (with a water pressure of not less than 0.4 MPa) is used to collect raw water or tap water, with tap water being the best option; Using a diaphragm pump (ensuring a water flow rate of approximately 500 mL / min at the filter outlet) to draw in pure water for filter cleaning can effectively reduce filter contamination and extend filter lifespan; if tap water is available on site, it can be directly connected to the tap water pipeline to reduce pure water consumption. A peristaltic pump is used to draw pure water to clean the sample cup and the flow cell of the detection unit. At the same time, the peristaltic pump draws out air and empties the liquid in the flow cell to keep the flow path dry and avoid contamination. An oil-free air compressor (0.5 MPa, flow rate 10 L / min) was used to dry the cleaned sedimentation tank and sample cups with high-pressure air to keep them dry and avoid noise and bacterial growth in a humid environment; the sample cups in the detection flow path were the focus of the drying process.

[0029] The second embodiment of this application, as shown below Figure 2 As shown, a method for cleaning the flow path of a traceability device is also disclosed, which includes the following steps: S1. After the tracer completes the water sample test, open the ball valve assembly to allow the water samples in the sedimentation tank 5, the first sample cup 12 and the second sample cup 14 to be naturally drained by gravity; at the same time, start the third peristaltic pump 16 to drain the water sample in the flow tank 17, and stop after 1 minute.

[0030] S2. Open the first ball valve 3 and start the booster pump 2 to inject the cleaning water in the clear water tank 1 into the sedimentation tank 5 through the spray pipe 4 to flush away solid impurities; at the same time, open the second ball valve 6 to discharge the sewage through the waste liquid pipe 21.

[0031] S3. Switch the three-way ball valve 8 to the pure water tank 20 flow path, start the diaphragm pump 9 to draw pure water, and rinse the first sample cup 12 after it flows through the filter module 11; after 2 minutes, close the bottom third ball valve 23, and stop the diaphragm pump after the liquid level sensor is triggered; then start the first peristaltic pump 13 to transfer the pure water rinsing solution in the first sample cup 12 to the second sample cup 14 at a flow rate of 300 mL / min, continue for 1.5 minutes and then stop, and repeat the cycle 3 times.

[0032] S4. Switch the first electromagnetic three-way valve 19 to the pure water tank 20 flow path, start the second peristaltic pump 15 to inject pure water into the second sample cup 14 at a flow rate of 300 mL / min; after 1 minute, close the fourth ball valve 24 at its bottom, and stop the second peristaltic pump 15 after the liquid level sensor is triggered; then start the third peristaltic pump 16 to deliver the pure water in the second sample cup 14 to the flow cell 17 at a flow rate of 200 mL / min, continue for 1 minute and then stop, and repeat the cycle 3 times.

[0033] S5. Keep the ball valve at the bottom of the sample cup open, start the air compressor 22 to dry the sample cup through the air inlet at the top, and stop after 1 minute; then close the ball valve at the bottom of all sample cups.

[0034] S6. Switch the first electromagnetic three-way valve 19 to the air path, start the second peristaltic pump 15 and run it for 2 minutes to inject air into the flow pool 17 for purging; then stop the peristaltic pump and close the clamp valve 18.

[0035] S7. When periodic deep cleaning is required or the spectral verification fails, switch the flow path to inject the special cleaning solution into the flow cell 17 and let it stand to react. After completion, drain the solution and perform the residue removal operation.

[0036] Preferably, the process of switching the flow path to inject the special cleaning solution into the flow-through tank 17 and allowing it to stand and react, followed by emptying and performing a residue removal operation, includes the following steps: S71. Switch the second electromagnetic three-way valve 25 to connect the third peristaltic pump 16 and the washing liquid tank 26, and open the clamp valve 18. S72. Start the third peristaltic pump 16 and run it at a flow rate of 200 mL / min for 1 minute. Then stop the third peristaltic pump 16, close the clamp valve 18, and let it stand for 0.5 to 1 hour. S73. Switch the second solenoid three-way valve 25 to connect the third peristaltic pump 16 and the waste liquid pipe 21, and open the clamp valve 18. S74. Start the third peristaltic pump 16 and run it at a flow rate of 200 mL / min for 1 minute to discharge the waste liquid in the flow tank 17 and pipeline into the waste liquid pipe 21.

[0037] It should be noted that the fluorescent fingerprint traceability device typically operates for 2 hours. Each cleaning step is automatically triggered by a single click from the host computer software. The process relationships between the cleaning steps are as follows: Figure 2 As shown, the cleaning time of the conventional process is ≤20 minutes, which will not affect the next test time of the equipment; the cleaning of the sedimentation tank and the cleaning of the pretreatment module are carried out simultaneously, saving cleaning time; the interval between the last cleaning can be appropriately shortened or extended according to the water quality conditions during the on-site test.

[0038] S8. Inject pure water into the flow tank 17 and perform a three-dimensional fluorescence spectral scan. After data processing, calculate the comprehensive pollution index. If the comprehensive pollution index value is lower than or equal to the preset threshold, the cleaning is deemed qualified; otherwise, repeat step S7.

[0039] Preferably, pure water is injected into the flow tank 17 and a three-dimensional fluorescence spectroscopy scan is performed. After data processing, the comprehensive pollution index is calculated. If the comprehensive pollution index value is lower than or equal to a preset threshold, the cleaning is deemed qualified; otherwise, step S7 is repeated, including the following steps: S81. Inject pure water into the flow cell 17 and start the fluorescence spectrometer to perform a three-dimensional scan to obtain the background fluorescence spectrum dataset; S82. Preprocess the spectral dataset to remove noise and interference, and calculate multiple preset spectral feature parameters; S83. Based on spectral characteristic parameters, the weights are dynamically adjusted by combining the coefficient of variation, and the environmental impact is corrected by multivariate regression to generate a comprehensive pollution index. S84. Compare the comprehensive pollution index with the preset qualified threshold; if the index is less than the preset qualified threshold, the cleaning is deemed qualified and the process is terminated; if it is higher than the preset qualified threshold, a control command is generated to drive the system to re-execute step S7.

[0040] Preferably, the comprehensive pollution index is generated by dynamically adjusting weights based on spectral characteristic parameters and using multivariate regression to correct environmental impacts, including the following steps: S831. Based on the historical cleanroom database, standardize the spectral characteristic parameters to obtain a standardized feature set; simultaneously collect feature measurement errors and environmental temperature drift data to obtain error data and environmental parameters; S832. Based on the standardized feature set, a dynamic weight is assigned to each feature using a coefficient of variation feedback mechanism to obtain a dynamic weight set; the anomaly detection algorithm is executed in parallel to obtain anomaly scores, and the confidence level of this calculation is evaluated to obtain the confidence score; S833 integrates standardized feature sets, dynamic weight sets, anomaly scores, confidence levels, error data, and environmental parameters, and performs comprehensive calculations using a multivariate fusion formula to generate a comprehensive pollution index.

[0041] It should be explained that the expression for the comprehensive pollution index is:

[0042]

[0043] In the formula, This represents the comprehensive pollution index; Indicates the total number of spectral features; An index representing spectral characteristics; Indicates the first i Importance weighting coefficients for each spectral feature; Indicates the first i Standardized values ​​of each spectral feature; This represents the weighting coefficient of the outlier impact factor; Indicates the outlier impact factor; The weighting coefficients representing the confidence level; Indicates the model confidence level; Indicates the weighting coefficients for the error term; This represents the total number of spectral features involved in error correction; Indicates the index of the spectral feature corresponding to the error term; Indicates the first j Measurement error term for each spectral feature; Indicates the first j The standard deviation of the error of each spectral feature; Represents the correction factor for environmental factors; Indicates the deviation of ambient temperature; This indicates the reference temperature for spectral measurements.

[0044] Specific examples are as follows: Suppose we are evaluating the cleaning effectiveness of an experimental device. The spectral characteristics of the device affect the contamination index. Therefore, we collect some spectral data and calculate a comprehensive contamination index through standardization, coefficient of variation weighting, and anomaly detection. If this index exceeds a preset acceptable threshold, the device needs to be cleaned again; otherwise, it is considered acceptable. The following data were obtained by scanning the equipment with a three-dimensional fluorescence spectrometer: Spectral characteristic data (normalized values): X 1 = 0.8 (standardized value of feature 1); X 2 = 1.2 (standardized value of feature 2); X 3 = 1.0 (standardized value of feature 3); Weighting coefficients (dynamically allocated based on the coefficient of variation): w1=0.5; w2=0.3; w3=0.2; Outlier impact factor: =2.0 (obtained from the anomaly detection algorithm); Confidence level: =0.9 (confidence level of the model); Measurement errors (e.g., equipment errors or external interference): =0.05 (measurement error of feature 1). =0.03 (measurement error of feature 2); =0.02 (measurement error of feature 3); Standard deviation of error: =0.01; =0.02; =0.015; Environmental correction parameters: Ambient temperature deviation: Δ T =5.0°C (actual temperature is 30°C, reference temperature is 25°C); Reference temperature for spectral measurements: =25.0°C; Environmental correction factor: =1.1; Substituting into the expression for the comprehensive pollution index, we calculate CPI==17.50956; The preset acceptable threshold is 15.0. According to the calculated CPI value (17.51), this value is obviously higher than the acceptable threshold; therefore, the cleaning process needs to be repeated.

[0045] Table 1 Cleaning Comparison Table

[0046] As shown in Table 1, the cleaning method of this application has significant advantages over traditional methods in terms of improving cleaning efficiency, reducing errors, and enhancing data accuracy and stability.

[0047] It should be noted that the calculation formulas and all parameters involved in the calculations in this application have been dimensionless beforehand. The process of dimensionless processing is well known in the industry and will not be described here.

[0048] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A flow path cleaning system for a traceability instrument, characterized in that, The flow path cleaning system includes: a clean water tank (1), a booster pump (2), a ball valve assembly, a sedimentation tank (5), a water inlet (7), a three-way ball valve (8), a diaphragm pump (9), a pressure sensor (10), a filter module (11), a first sample cup (12), a peristaltic pump assembly, a second sample cup (14), a flow cell (17), a pinch valve (18), a first electromagnetic three-way valve (19), a pure water tank (20), a waste liquid pipe (21), an air compressor (22), a second electromagnetic three-way valve (25), and a washing liquid tank (26). The clear water tank (1) is connected to the ball valve assembly via the booster pump (2), and the ball valve assembly is connected to the sedimentation tank (5) via a pipeline. The sedimentation tank (5) is provided with a water inlet (7), which is connected to the diaphragm pump (9) and the pure water tank (20) via the three-way ball valve (8). The pure water tank (20) is connected to the first electromagnetic three-way valve (19) via a pipeline. The diaphragm pump (9) is connected to the filter module (11) via the pressure sensor (10), and the filter module (11) is connected to the first sample cup (12), the second sample cup (14) and the first electromagnetic three-way valve (19) via the peristaltic pump assembly. The three ports of the second electromagnetic three-way valve (25) are respectively connected to the second sample cup (14), the peristaltic pump assembly and the flow cell (17) through pipelines; The bottom ends of the sedimentation tank (5), the first sample cup (12), the second sample cup (14) and the flow tank (17) are all connected to the waste liquid pipe (21) through ball valve assemblies.

2. The flow path cleaning system of the traceability device according to claim 1, characterized in that, The ball valve assembly includes a first ball valve (3), a second ball valve (6), a third ball valve (23), a fourth ball valve (24), and the pinch valve (18). The first ball valve (3) is connected to the booster pump (2) and the sedimentation tank (5) respectively through pipelines at both ends; The two ends of the second ball valve (6) are connected to the sedimentation tank (5) and the waste liquid pipe (21) respectively through pipelines; The two ends of the third ball valve (23) are respectively connected to the first sample cup (12) and the waste liquid pipe (21) through pipelines; The two ends of the fourth ball valve (24) are respectively connected to the second sample cup (14) and the waste liquid pipe (21) through pipelines; The two ends of the clamp valve (18) are respectively connected to the flow tank (17) and the waste liquid pipe (21) through pipelines; The peristaltic pump assembly includes a first peristaltic pump (13), a second peristaltic pump (15), and a third peristaltic pump (16). The two ends of the first peristaltic pump (13) are respectively connected to the first sample cup (12) and the second sample cup (14) through pipelines; The two ends of the second peristaltic pump (15) are respectively connected to the second sample cup (14) and the first electromagnetic three-way valve (19) through pipelines; The two ends of the third peristaltic pump (16) are respectively connected to the flow tank (17) and the second electromagnetic three-way valve (25) through pipelines; The bottom end of the second electromagnetic three-way valve (25) is provided with a washing liquid tank (26).

3. The flow path cleaning system of the traceability device according to claim 1, characterized in that, The flow cell (17) is filled with a cleaning solution, which includes a sodium hypochlorite solution with a mass concentration of 0.5%-1% or a citric acid solution with a mass concentration of 0.5%-1%.

4. The flow path cleaning system of the traceability device according to claim 1, characterized in that, The sedimentation tank (5) is equipped with a jetting pipe (4) on its body. The jetting pipe (4) is used to generate a fan-shaped jet or a solid cone-shaped jet to expand the cleaning coverage area.

5. The flow path cleaning system of the traceability device according to claim 1, characterized in that, The high-pressure side pipeline of the filter module (11) is made of PVC; the low-pressure side pipeline of the filter module (11) is made of polytetrafluoroethylene. The inner diameter of the polytetrafluoroethylene (PTFE) pipe is 2mm-5mm.

6. A method for cleaning the flow path of a traceability instrument, used to implement the flow path cleaning system of the traceability instrument according to any one of claims 1-5, characterized in that, The flow path cleaning method includes the following steps: S1. After the tracer completes the water sample test, open the ball valve assembly to allow the water samples in the sedimentation tank (5), the first sample cup (12) and the second sample cup (14) to be naturally drained by gravity; at the same time, start the third peristaltic pump (16) to drain the water sample in the flow tank (17) and stop after 1 minute. S2. Open the first ball valve (3) and start the booster pump (2) to inject the cleaning water in the clear water tank (1) into the sedimentation tank (5) through the spray pipe (4) to flush away solid impurities; at the same time, open the second ball valve (6) to discharge the sewage through the waste liquid pipe (21); S3. Switch the three-way ball valve (8) to the pure water tank (20) flow path, start the diaphragm pump (9) to draw pure water, and rinse the first sample cup (12) after it flows through the filter module (11); close the bottom third ball valve (23) after 2 minutes, and stop the diaphragm pump after the liquid level sensor is triggered; then start the first peristaltic pump (13) to transfer the pure water rinsing solution in the first sample cup (12) to the second sample cup (14) at a flow rate of 300 mL / min, stop after 1.5 minutes, and repeat the cycle 3 times; S4. Switch the first electromagnetic three-way valve (19) to the pure water tank (20) flow path, start the second peristaltic pump (15) to inject pure water into the second sample cup (14) at a flow rate of 300 mL / min; close the fourth ball valve (24) at the bottom after 1 minute, and stop the second peristaltic pump (15) after the liquid level sensor is triggered; then start the third peristaltic pump (16) to deliver the pure water in the second sample cup (14) to the flow cell (17) at a flow rate of 200 mL / min, continue for 1 minute and then stop, and repeat 3 times. S5. Keep the ball valve at the bottom of the sample cup open, start the air compressor (22) to dry the sample cup through the air inlet at the top of the sample cup, and stop after 1 minute; then close all the ball valves at the bottom of the sample cup. S6. Switch the first electromagnetic three-way valve (19) to the air path, start the second peristaltic pump (15) to run for 2 minutes, and inject air into the flow tank (17) for purging; then stop the peristaltic pump and close the clamp valve (18). S7. When periodic deep cleaning is required or the spectral verification fails, switch the flow path to inject the special cleaning solution into the flow cell (17) and let it stand to react. After completion, drain the solution and perform the residue removal operation. S8. Inject pure water into the flow tank (17) and perform three-dimensional fluorescence spectroscopy scanning. After data processing, calculate the comprehensive pollution index. If the comprehensive pollution index value is lower than or equal to the preset threshold, the cleaning is deemed qualified; otherwise, repeat step S7.

7. The flow path cleaning system of the traceability device according to claim 6, characterized in that, The process of switching the flow path involves injecting a special cleaning solution into the flow-through tank (17) and allowing it to stand and react. After completion, the tank is emptied and a residue removal operation is performed, including the following steps: S71. Switch the second solenoid three-way valve (25) to connect the third peristaltic pump (16) and the washing liquid tank (26), and open the clamp valve (18). S72. Start the third peristaltic pump (16), run it at a flow rate of 200 mL / min for 1 min, then stop the third peristaltic pump (16), close the clamp valve (18), and let it stand for 0.5~1 h. S73. Switch the second solenoid three-way valve (25) to connect the third peristaltic pump (16) and the waste liquid pipe (21), and open the clamp valve (18). S74. Start the third peristaltic pump (16) and run it for 1 minute at a flow rate of 200 mL / min to discharge the waste liquid in the flow tank (17) and pipeline into the waste liquid pipe (21).

8. The flow path cleaning method for the traceability device according to claim 6, characterized in that, The process of injecting pure water into the flow tank (17) and performing a three-dimensional fluorescence spectral scan, followed by data processing, calculates the comprehensive pollution index. If the comprehensive pollution index value is lower than or equal to a preset threshold, the cleaning is deemed qualified; otherwise, step S7 is repeated, including the following steps: S81. Inject pure water into the flow cell (17) and start the fluorescence spectrometer to perform a three-dimensional scan to obtain the background fluorescence spectrum dataset; S82. Preprocess the spectral dataset to remove noise and interference, and calculate multiple preset spectral feature parameters; S83. Based on spectral characteristic parameters, the weights are dynamically adjusted by combining the coefficient of variation, and the environmental impact is corrected by multivariate regression to generate a comprehensive pollution index. S84. Compare the comprehensive pollution index with the preset qualified threshold; if the index is less than the preset qualified threshold, the cleaning is deemed qualified and the process is terminated; if it is higher than the preset qualified threshold, a control command is generated to drive the system to re-execute step S7.

9. The flow path cleaning method for the traceability device according to claim 8, characterized in that, The process of generating a comprehensive pollution index based on spectral characteristic parameters, dynamically adjusting weights using the coefficient of variation, and correcting environmental impact through multivariate regression includes the following steps: S831. Based on the historical cleanroom database, standardize the spectral characteristic parameters to obtain a standardized feature set; simultaneously collect feature measurement errors and environmental temperature drift data to obtain error data and environmental parameters; S832. Based on the standardized feature set, a dynamic weight is assigned to each feature using a coefficient of variation feedback mechanism to obtain a dynamic weight set; the anomaly detection algorithm is executed in parallel to obtain an anomaly score, and the confidence level of this calculation is evaluated to obtain the confidence score; S833. Integrate the standardized feature set, dynamic weight set, anomaly score, confidence level, error data and environmental parameters, and perform comprehensive calculation through a multivariate fusion formula to generate a comprehensive pollution index.

Images