Automatic rapid detection method and device for harmful substances in food

Abstract

The application discloses a food harmful substance automatic rapid detection method and device in the technical field of food detection, which comprises an automatic detection system and a sample preparation equipment, and the automatic detection system is signal connected with the sample preparation equipment; the sample preparation equipment comprises an identification sampling assembly, a sample feeding assembly and a cleaning assembly; a support box is fixedly connected to the bottom of the identification sampling assembly; a plurality of device boxes are arranged in the support box; pretreatment assemblies are symmetrically arranged in the device boxes; and the cleaning assembly is located between the symmetric pretreatment assemblies; the cleaning assembly comprises a liquid tank; the liquid tank is divided into a first chamber and a second chamber; a clean water assembly is arranged in the first chamber; symmetric liquid feeding assemblies are arranged on the two sides of the clean water assembly; a waste water assembly is arranged in the second chamber; and a waste water pipe is in communication between the waste water assembly and a stirring assembly. The application has simple structure and is easy to operate; after sampling is completed, the cleaning assembly can automatically clean residual liquid and discharge the residual liquid into the waste water assembly, so that the detection efficiency is effectively improved without affecting the detection result.

Description

Technical Field

[0001] This invention belongs to the field of food testing technology, specifically an automated rapid detection method and device for harmful substances in food. Background Technology

[0002] With the continuous accumulation of social wealth and the ongoing progress of social civilization, more and more new ingredients are being discovered and applied in actual food production. However, during the food production and processing process, due to factors such as the production environment and processing techniques, the final food produced may contain harmful substances that could damage human health. Therefore, corresponding testing technologies and methods are needed to ensure food safety and guarantee that the food ultimately consumed by consumers is safe and harmless.

[0003] In the actual detection of harmful substances in food, most existing detection technologies require manual operation of food testing workbenches, increasing labor costs. In some devices capable of rapid detection, samples need to be heated in a heating device before being mixed with solvents and sent for testing. However, these devices lack self-cleaning capabilities, resulting in residues of the previous sample remaining inside the heating device. Manual cleaning slows down the detection process, affecting both the results and efficiency. Therefore, it is necessary to propose an automated rapid detection method and device for harmful substances in food that can more conveniently and efficiently complete the detection process. Summary of the Invention

[0004] To address the issues of residual samples affecting the detection results of subsequent samples and manual cleaning slowing down the pretreatment process before detection, the present invention aims to provide an automated rapid detection device for harmful substances in food. By automatically cleaning residual liquid and discharging it into a wastewater component after sampling, the device effectively improves detection efficiency without affecting the detection results.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: an automated rapid detection device for harmful substances in food, comprising an automated detection system and a sample preparation device, wherein the automated detection system is signal-connected to the sample preparation device, the sample preparation device comprising an identification sampling component, a sample delivery component, and a cleaning component for cleaning residual samples, wherein a support box is fixedly connected to the bottom of the identification sampling component, and a plurality of device boxes are provided inside the support box, wherein pretreatment components are symmetrically arranged inside the device boxes, and the cleaning component is located between the symmetrical pretreatment components, wherein the pretreatment component includes a stirring component, the sample delivery component is located below the support box, and a liquid phase detector for detecting harmful substances in food is detachably connected to the end of the sample delivery component away from the support box;

[0006] The cleaning component includes a liquid tank, which is divided into a first chamber and a second chamber from top to bottom. The first chamber contains a clean water component, and there are symmetrical liquid delivery components on both sides of the clean water component. The clean water component and the stirring component are connected by liquid delivery components. The second chamber contains a wastewater component, and there is a wastewater pipe connecting the wastewater component and the stirring component.

[0007] The basic principle is as follows: First, the sample food is placed on the identification sampling component. Since different sample foods have different physicochemical properties and there are many kinds of harmful substances in the sample food, they need to be dissolved in the corresponding solvent to produce the required chromatogram during detection. Therefore, before preprocessing, the food image needs to be acquired and collected through the identification sampling component. Then, the collected image information is transmitted to the automated detection system for database comparison and judgment, and the physicochemical properties and mixing scheme of the corresponding sample food are called, and then transmitted to the preprocessing component.

[0008] Simultaneously, the sampling component transports the food sample to the pretreatment component. The pretreatment component performs basic crushing of the food sample and adds the appropriate solvent for mixing. The processed sample is then sent through the sample delivery component, which sends the sample into a liquid phase detector to detect whether the food contains harmful substances. At this time, there will be some liquid residue of the sample in the pretreatment component. The water purification component is then activated to deliver water to the pretreatment component through the liquid delivery component for cleaning. After cleaning is completed, the wastewater is discharged into the wastewater component through the wastewater pipe.

[0009] The beneficial effects of the basic scheme are: 1. By identifying and comparing the image information of the sample food through the sampling component and the automated detection system, the solvent of the corresponding food can be automatically obtained. During the process of processing the sample food in the pretreatment component, the corresponding solvent is automatically added under the control of the automated detection system, saving the operator the tedious step of comparing data one by one.

[0010] 2. The water supplied by the clean water unit can clean the residual samples in the pretreatment unit. Since the liquid chromatography detector has a wide detection range and can detect trace components in food, if the residual samples are not cleaned, they will adhere to the food samples in the next pretreatment, thus affecting the analysis results of the liquid chromatography detector. In order to avoid the new food samples and solvents being mixed again in the next test and affecting the test results, the wastewater unit can recycle the wastewater discharged after cleaning and centrally recycle and treat it, avoiding the waste of water resources and the pollution of chemical reagents.

[0011] 3. Liquid chromatography detectors can separate complex food samples and rapidly detect trace components. They can not only perform quantitative analysis but also identify specific components in the sample. They are highly efficient and can also detect harmful substances in food in a comprehensive manner. Liquid chromatography detectors are applicable to various organic compounds, including proteins, sugars, vitamins and amino acids, providing versatility for the detection of a variety of food samples.

[0012] Furthermore, the identification sampling component includes an electric turntable, a through plate, and an identification box. The bottom of the electric turntable is rotatably connected to a drive plate, and the side of the drive plate away from the electric turntable is fixedly connected to the through plate. The bottom of the through plate is fixedly connected to a support box. The lower part of the identification box is fixedly connected to one side of the support box, and the top of the identification box is located above the electric turntable. An identifier is provided on the top wall inside the identification box.

[0013] The beneficial effects of the basic scheme are: the electric turntable will prioritize sending the sample food into the recognition box, the camera on the recognizer will capture the image of the sample food and transmit it, providing a way to collect data for image information comparison, and after the recognition is completed, the electric turntable will continue to send the sample food to the next position.

[0014] Furthermore, several trays that can be retracted into the electric turntable are slidably connected to the electric turntable. Several push-pull grooves corresponding to the trays are opened on the electric turntable. A first electric push rod is detachably connected to the inner side wall of each push-pull groove. Several falling grooves corresponding to the push-pull grooves are opened on the through plate. The top of the falling groove is rotatably connected to the electric turntable. The bottom of the falling groove is connected to the top of the pretreatment component. A weighing sensor is detachably connected to one side of the top of the falling groove. The top of the weighing sensor is rotatably connected to the electric turntable. The first electric push rod is signal connected to the weighing sensor. A tray controller is detachably connected inside the through plate.

[0015] The beneficial effects of the basic scheme are as follows: Under normal conditions, the first electric push rod is in an extended state, the tray is located outside the push-pull groove and the through hole of the electric turntable is sealed, so that the food can be placed on the tray and rotate with the electric turntable; when the sample food placed on the tray rotates to above the weighing sensor, the weighing sensor will receive the weight change information and then transmit it to the tray controller. When the tray rotates to above the drop groove, the tray controller controls the first electric push rod to retract, the tray enters the push-pull groove, and the sample food falls into the pre-processing component through the drop groove after it is no longer supported by the tray, thus realizing the transportation of the sample food.

[0016] Furthermore, the stirring assembly includes a stirring chamber and a sample outlet chamber that are connected from top to bottom. The top of the stirring chamber has a sample inlet that is connected to the lower drop trough. A motor is detachably connected to the top of the stirring chamber. A second electric push rod is coaxially fixedly connected to the output shaft of the motor. The end of the second electric push rod away from the motor passes through the top wall of the stirring chamber and is detachably connected to a rotating rod. Several blades for stirring and chopping are fixedly connected to the rotating rod. The inner wall of the stirring chamber is provided with a heating layer, and several heating wires are installed in the heating layer.

[0017] The beneficial effects of the basic scheme are as follows: the second electric push rod, driven by a motor, rotates along with the motor output shaft, which in turn drives the blades on the rotating rod to rotate, thus crushing the food sample entering the mixing chamber from the sample inlet. Since different solid food samples have different melting points, the automated detection system will activate the heating wire and adjust the temperature inside the mixing chamber according to the melting point of the current food sample, providing the corresponding melting heating temperature for the food sample. This allows the components in the sample to dissolve and precipitate better into the corresponding solution, which helps improve the accuracy of subsequent detection. At the same time, the heating wire can dry the mixing chamber during the cleaning process after detection, preventing moisture from mixing with the liquid sample and affecting the detection results of the liquid phase detector, thus maximizing the accuracy of the food sample detection.

[0018] Furthermore, each liquid delivery component includes a solvent tank and an inlet pipe. The solvent tank is symmetrically arranged in the first chamber. The two ends of the inlet pipe are respectively connected to the stirring chamber and the solvent tank. A first water pump is installed on the inlet pipe and is detachably connected to the top of the solvent tank. One end of the inlet pipe inside the solvent tank is connected to a reversing valve. The end of the reversing valve away from the first water pump is connected to several glass tubes. A test tube rack is fixedly connected inside the solvent tank. Several test tubes are installed on the test tube rack. The ends of the glass tubes away from the reversing valve are all inserted into the test tubes.

[0019] The beneficial effects of the basic scheme are: the multiple test tubes provide a variety of solvents for different food samples. Normally, selecting an appropriate sample mixture solution requires laboratory personnel to select and mix it. However, by using the first water pump to extract the solvent from the test tubes in the solvent tank, the automatic detection system will open the valve connecting the corresponding test tube, and then deliver it to the stirring chamber through the liquid inlet pipe to mix with the crushed and melted food sample, which greatly saves the cost of manual screening.

[0020] Furthermore, a filter screen is detachably connected to the connection between the stirring chamber and the sample outlet chamber. A guide plate is fixedly connected below the filter screen, and a liquid outlet is fixedly connected below the guide plate. The liquid outlet is connected to the bottom of the device box. A wastewater valve is provided at the end of the liquid outlet near the guide plate, and a liquid outlet valve is fixedly connected at the end of the liquid outlet away from the guide plate. A dripping pipe is fixedly connected to the bottom of the liquid outlet.

[0021] The beneficial effects of the basic scheme are as follows: the sample solution mixed in the mixing chamber will enter the sample outlet chamber through the filter screen. At the same time, the filter screen will filter out larger pieces of sample food that have not been completely dissolved in the solvent, so that they remain in the mixing chamber to continue to be crushed and melted until they enter the sample outlet chamber. This improves the reusability of the sample food and provides more components for sample detection to analyze and output accurate data. The guide plate will transport the mixed sample solution to the outlet. The outlet valve will open under the control of the automated detection system and then transport the sample solution to the dropper.

[0022] Furthermore, the sample delivery assembly includes a support frame, a conveyor belt slidably connected to the support frame, several drive rollers rotatably connected inside the conveyor belt, and a detection assembly detachably connected to the end of the conveyor belt away from the support box. The detection assembly includes a liquid phase detector, which is located at the end of the conveyor belt away from the support box. The liquid phase detector has a detection port, and the conveyor belt communicates with the detection port.

[0023] The beneficial effects of the basic scheme are: the sample box is placed on the conveyor belt, and the conveyor belt runs forward continuously under the drive of the drive roller. When the sample box is below the dropper, the conveyor temporarily stops, and the conveyor continues to run until the sample liquid is dripped into the sample box by the dropper, until it is delivered to the liquid phase detector.

[0024] Furthermore, the water purification component includes a water purification tank, which is detachably connected to the bottom of the first chamber. A water pipe connects the water purification tank to the reversing valve. The wastewater component includes a wastewater tank, which is detachably connected to the bottom of the second chamber. Both ends of the wastewater pipe are connected to the wastewater tank and the wastewater valve, respectively. A second water pump is connected to the wastewater pipe.

[0025] The beneficial effects of the basic scheme are as follows: After the sample solution is mixed and output, the outlet valve will close. At this time, the valve connecting the reversing valve and the water pipe will open, and the first water pump will draw water from the clean water tank. The clean water flows through the first water pump and the inlet pipe to clean the internal solvent residue. At the same time, after entering the stirring chamber, it will clean the inner wall of the stirring chamber and the blades. The motor will continue to rotate, so that the clean water will wash away more residue on the inner wall under the action of centrifugal force. The wastewater valve will discharge the wastewater after cleaning into the wastewater tank, realizing the recycling of water resources and preventing chemical reagent contamination.

[0026] Furthermore, the automated detection system includes a sampling module, an identification module, a preprocessing module, a detection module, a result output and communication module, and a cleaning module;

[0027] The sampling module is used to collect image information of food entering the identification box;

[0028] The recognition module is used to receive the collected food image information and perform data comparison and recognition on the image information;

[0029] The control module is used to control the pretreatment and cleaning components within the device housing;

[0030] The pretreatment module is used to process samples by adding appropriate solvents to address the different chemical properties of different foods.

[0031] The detection module is used to detect samples and to test samples sent into the liquid phase detector.

[0032] The results output and communication module is used to obtain sample results and store information results. After the test results are obtained, they are uploaded to the cloud for subsequent data comparison.

[0033] The cleaning module is used to clean residual samples, wash the residue of the previous sample food in the mixing chamber and the sample outlet chamber, and discharge wastewater.

[0034] The beneficial effects of the basic scheme are as follows: First, image information of the sample food is acquired. The recognition module compares and identifies the image information. The control module controls the operation of each component within the device box. The pretreatment module stirs the sample food and ensures thorough mixing with the corresponding solvent. The detection module performs chromatographic detection on the sample food after pretreatment. The results output and communication module display the detection results and store the information for subsequent data retrieval and comparison. The cleaning module removes residues from the previous sample food and discharges wastewater to avoid affecting the detection results of the next sample. This achieves fully automated identification and cleaning of sample food.

[0035] Furthermore, an automated rapid detection method for harmful substances in food includes the following steps:

[0036] Step 1, Data Acquisition: The sampling module acquires and collects images of the food below the recognition box. Then, the image information transmitted to the recognition module is compared and judged against the database. The physicochemical properties of the corresponding food sample are then retrieved. Based on the type of solvent that needs to be mixed with the food sample, the data is transmitted to the preprocessing module, which adds the corresponding solvent.

[0037] Step 2, Pre-treatment: After the sample food enters the mixing chamber, the motor starts working, and the blades in the mixing chamber crush the sample food. At the same time, the data information of the sample food is transmitted to the pre-treatment module. The reversing valve is used to extract the solvent from the corresponding test tube according to the required solvent. After being fully mixed with the sample food in the mixing chamber, the solvent enters the sample outlet chamber. After being completely crushed and mixed, the control module opens the liquid outlet valve to realize the pre-processing of the sample before it is sent for testing.

[0038] Step 3, Sample detection: The sample delivered from the outlet valve enters the liquid phase detector through the sample delivery assembly. The liquid sample components are pumped into the chromatographic column as the mobile phase through the high-pressure delivery system. The packing material in the chromatographic column is used to separate the components from each other. The separated components will be detected by the detector at the outlet of the chromatographic column. The detector will measure the content of these components and output the results.

[0039] Step 4, Output and Storage: The analytes detected by the liquid phase detector will generate a liquid chromatogram in the results output and communication module. At the same time, the data on whether the sample contains harmful substances will be saved to the cloud for future data comparison with similar foods.

[0040] Step 5, Cleaning and Discharge: While the sample is being tested, the liquid outlet valve is closed. The first water pump draws water from the clean water tank and delivers it to the mixing chamber and the sample outlet chamber to clean the residual sample. Then, the second water pump pumps the wastewater to the wastewater tank.

[0041] The beneficial effects of the basic scheme are as follows: Through automation and intelligent technology, this method can automatically complete the pretreatment and detection of harmful substances in food and provide automatic cleaning, which greatly improves detection efficiency and reduces labor costs; Utilizing image recognition and data comparison technology, this method can determine the physicochemical properties of the sample food and allocate appropriate solutions for mixing, improving sample processing efficiency; At the same time, by cleaning the pretreatment components, this method can automatically clean the residue in the chamber after processing, eliminating the need for manual cleaning without affecting the detection results of the next sample food, ensuring accurate detection results and improving the efficiency of sample processing before detection. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of an automated rapid detection method for harmful substances in food according to an embodiment of the present invention.

[0043] Figure 2 This is an isometric view of the automated rapid detection device for harmful substances in food in an embodiment of the present invention.

[0044] Figure 3 This is a front cross-sectional view of the automated rapid detection device for harmful substances in food in an embodiment of the present invention.

[0045] Figure 4 This is a front cross-sectional view of the liquid tank of the automated rapid detection device for harmful substances in food in an embodiment of the present invention.

[0046] The reference numerals in the accompanying drawings include: electric turntable 1, tray 101, push-pull groove 102, first electric push rod 103, weighing sensor 104, tray controller 105, drive plate 106, identification box 2, identifier 201, through plate 3, drop trough 301, support box 4, device box 401, conveyor belt 5, drive roller 601, support frame 602, stirring chamber 7, liquid tank 8, first chamber 801, second chamber 802, dripping pipe 9, liquid outlet. 10. Detection port 11. Liquid phase detector 12. Sample inlet 13. Motor 14. Second electric push rod 15. Rotating rod 16. Blade 17. Heating wire 18. Filter screen 19. Guide plate 20. Sample outlet chamber 21. Liquid outlet valve 22. Wastewater pipe 23. Liquid inlet pipe 24. First water pump 25. Water pipe 26. Clean water tank 27. Solvent tank 28. Wastewater valve 29. Reversing valve 30. Glass tube 31. Test tube 32. Test tube rack 33. Wastewater tank 34. Second water pump 35. Detailed Implementation

[0047] The following detailed description illustrates the specific implementation method:

[0048] Example 1, basically as shown in the attached document. Figures 1-4 As shown: An automated rapid detection device for harmful substances in food includes an automated detection system and a sample preparation device. The automated detection system is signal-connected to the sample preparation device. The sample preparation device includes an identification sampling component, a sample delivery component, and a cleaning component for cleaning residual samples. A support box 4 is fixedly connected to the bottom of the identification sampling component. Several device boxes 401 are provided inside the support box 4. Pre-treatment components are symmetrically arranged inside the device boxes 401. The cleaning component is located between the symmetrical pre-treatment components. The sample delivery component is located below the support box 4. A liquid phase detector 12 for detecting harmful substances in food is detachably connected to the end of the sample delivery component away from the support box 4.

[0049] The identification sampling assembly includes an electric turntable 1, a through plate 3, and an identification box 2. A drive plate 106 is rotatably connected to the bottom of the electric turntable 1. The side of the drive plate 106 away from the electric turntable 1 is fixedly connected to the through plate 3. The bottom of the through plate 3 is fixedly connected to a support box 4. The lower part of the identification box 2 is fixedly connected to one side of the support box 4. The top of the identification box 2 is located above the electric turntable 1. An identifier 201 is installed on the inner top wall of the identification box 2. Several trays 101 that can be retracted into the electric turntable 1 are slidably connected to the electric turntable 1. Several pushers corresponding to the trays 101 are opened on the electric turntable 1. The inner walls of the pull groove 102 and the push-pull groove 102 are detachably connected to a first electric push rod 103. The through plate 3 has several falling grooves 301 corresponding to the push-pull groove 102. The top of the falling groove 301 is rotatably connected to the electric turntable 1, and the bottom of the falling groove 3 is connected to the top of the pretreatment component. A weighing sensor 104 is detachably connected to one side of the top of the falling groove 301. The top of the weighing sensor 104 is rotatably connected to the electric turntable 1. The first electric push rod 103 is signal connected to the weighing sensor 104. A tray controller 105 is detachably connected inside the through plate 3.

[0050] The pretreatment assembly includes a stirring assembly, which comprises a stirring chamber 7 and a sample outlet chamber 21 connected from top to bottom. The top of the stirring chamber 7 has a sample inlet 13, which communicates with a lower drop trough 301. A motor 14 is detachably connected to the top of the stirring chamber 7. A second electric push rod 15 is coaxially and fixedly connected to the output shaft of the motor 14. A rotating rod 16 is detachably connected to the end of the second electric push rod 15 that passes through the inner top wall of the stirring chamber 7. Several blades 17 for stirring and chopping are fixedly connected to the rotating rod 16. The inner wall of the mixing chamber 7 is provided with a heating layer, and several electric heating wires 18 are installed in the heating layer; a filter screen 19 is detachably connected to the connection between the mixing chamber 7 and the sample outlet chamber 21, a guide plate 20 is fixedly connected below the filter screen 19, a liquid outlet 10 is fixedly connected below the guide plate 20, the liquid outlet 10 is connected to the bottom of the device box 401, a wastewater valve 29 is provided at the end of the liquid outlet 10 near the guide plate 20, a liquid outlet valve 22 is fixedly connected at the end of the liquid outlet 10 away from the guide plate 20, and a drip pipe 9 is fixedly connected to the bottom of the liquid outlet 10.

[0051] The cleaning component includes a liquid tank 8, which is divided into a first chamber 801 and a second chamber 802 from top to bottom. The first chamber 801 contains a clean water component, and symmetrical liquid delivery components are provided on both sides of the clean water component. The clean water component is connected to the stirring chamber 7 by the liquid delivery components. The second chamber 802 contains a wastewater component, and a wastewater pipe 23 is connected to the stirring chamber 7. The clean water component includes a clean water tank 27, which is detachably connected to the bottom of the first chamber 801. A water pipe 26 is connected to the clean water tank 27 and the reversing valve 30. The wastewater component includes a wastewater tank 34, which is detachably connected to the bottom of the second chamber 802. The two ends of the wastewater pipe 23 are connected to the wastewater tank 34 and the wastewater valve 29, respectively. A second water pump 35 is connected to the wastewater pipe 23.

[0052] Each liquid delivery assembly includes a solvent tank 28 and an inlet pipe 24. The two ends of the inlet pipe 24 are connected to the stirring chamber 7 and the solvent tank 28, respectively. A first water pump 25 is installed on the inlet pipe 24. The first water pump 25 is detachably connected to the top of the solvent tank 28. One end of the inlet pipe 24 located inside the solvent tank 28 is connected to a reversing valve 30. A water pipe 26 is connected between the reversing valve 30 and the clear water tank 27. The end of the reversing valve 30 away from the first water pump 25 is connected to several glass tubes 31. A test tube rack 33 is fixedly connected inside the solvent tank 28. Several test tubes 32 are installed on the test tube rack 33. The ends of the glass tubes 31 away from the reversing valve 30 are all inserted into the test tubes 32.

[0053] The sample delivery assembly includes a support frame 602, a conveyor belt 5 is slidably connected to the support frame 602, and several drive rollers 601 are rotatably connected inside the conveyor belt 5. The end of the conveyor belt 5 away from the support box 4 is detachably connected to the liquid phase detector 12. The liquid phase detector 12 has a detection port 11, and the conveyor belt 5 is connected to the detection port 11.

[0054] The specific implementation process is as follows: First, place the sample food on several trays 101 in sequence. Start the drive disk 106. The drive disk 106 drives the electric turntable 1 to rotate. The electric turntable 1 moves the sample food on the tray 101 to the bottom of the identification box 2. The camera on the identifier 201 inside the identification box 2 will capture the image of the sample food below and transmit it to the automated detection system, providing a way to collect data for image information comparison. After the identification is completed, the electric turntable 1 will continue to rotate. When the sample food placed on the tray 101 moves to the drop trough 103, the weighing sensor 104 will receive the weight change information and then transmit the signal to the tray controller 105 in the through plate 3 to stop the rotation of the electric turntable 1. The tray controller 105 that receives the signal will control the first electric push rod 103 to retract and pull the tray 101 into the push-pull groove 102. After the sample food is no longer supported by the tray 101, it falls into the mixing chamber 7 through the drop trough 301.

[0055] The motor 14 inside the device box 401 continuously drives the second electric push rod 15 to rotate with the output shaft of the motor 14, which in turn drives the blade 17 on the rotating rod 16 to rotate, thus crushing the sample food that enters the mixing chamber 7 from the sample inlet 13. The automated detection system can also determine the size of the sample food based on the collected image data of the sample food, and then automatically adjust the length of the second electric push rod 15. If the sample food is large, the extended part of the second electric push rod 15 will retract inward, driving the rotating rod 16 upward. The rotating rod 16 will drive the blade 17 to rotate from above the sample food. As the sample food is crushed, the second electric push rod 15 slowly extends outward, and the rotating rod 16 moves downward, so that the sample food can be fully crushed. At the same time, the automated detection system will activate the heating wire 18 according to the melting point of the current sample food, raising it to the corresponding temperature to promote the melting of the sample food.

[0056] Simultaneously, the reversing valve 30 opens the valve connecting to the corresponding test tube 32. Under the judgment of the automated detection system, the first water pump 25 runs to extract the solvent from the test tube 32 in the solvent tank 28, and then delivers it to the stirring chamber 7 through the liquid inlet pipe 24. It mixes with the crushed and melted sample food. The motor 14 continues to drive the rotating rod 16 to drive the blade 17 to rotate, fully mixing the sample food and solvent in the stirring chamber 7 into a sample liquid. The mixed sample liquid in the stirring chamber 7 will enter the sample outlet chamber 21 through the filter screen 19. The filter screen 19 will filter out larger pieces of sample food that have not been completely dissolved in the solvent, keeping them in the stirring chamber 7. The second electric push rod 15 pushes the rotating rod 16 to the top of the filter screen 19 to help crush the large pieces of sample food remaining on the filter screen 19 until they enter the sample outlet chamber 21. The guide plate 20 will deliver the mixed sample liquid to the liquid outlet 10. The liquid outlet valve 22 opens under the control of the automated detection system, and then delivers the sample liquid to the dropper 9.

[0057] The sample box is placed on the conveyor belt 5. Driven by the drive roller 601, the conveyor belt 5 continues to move forward. When the sample box is below the dropper 9, the conveying is temporarily stopped by the control of the automated detection system. The conveying continues until the dropper 9 drips the sample liquid into the sample box. The conveying continues until the sample is delivered to the liquid chromatographic detector 12. The liquid sample components are pumped into the chromatographic column as the mobile phase in the liquid chromatographic detector 12 through the high-pressure delivery system. The packing material in the chromatographic column is used to separate the components. The separated components are detected by the detector at the outlet of the chromatographic column. The detector measures the content of these components and outputs the results.

[0058] After the sample solution is mixed and output, the outlet valve 22 will close. Because the liquid phase detector 12 has a wide detection range and can detect trace components in food, if the residual sample is not cleaned, it will adhere to the next pre-processed food sample, thus affecting the analysis results of the liquid phase detector. Therefore, at this time, the valve connecting the reversing valve 30 and the water pipe 26 is opened, and the first water pump 25 draws water from the clean water tank 27. The clean water flows through the first water pump 25 and the inlet pipe 24 into the stirring chamber 7 to clean the residual solvent inside. The motor 14 continuously drives the rotating rod 16 to rotate the blade 17, so that the clean water washes away more residue on the inner wall under the action of centrifugal force. The wastewater valve 29 will discharge the wastewater that flows into the guide plate 20 after cleaning into the wastewater tank 34 to realize the recovery of water resources and prevent chemical reagent contamination. The residual heat in the heating layer will evaporate the water remaining in the stirring chamber 7, minimizing the impact on the mixing and processing of the next food sample, and thus avoiding affecting the detection results.

[0059] Example 2

[0060] The difference from the above embodiments is that the automated detection system includes a sampling module, an identification module, a preprocessing module, a detection module, a result output and communication module, and a cleaning module;

[0061] The sampling module is used to collect image information of the food entering the identification box 2;

[0062] The recognition module is used to receive the collected food image information and perform data comparison and recognition on the image information;

[0063] The control module is used to control the pretreatment and cleaning components within the device housing 401;

[0064] The pretreatment module is used to process samples by adding appropriate solvents to address the different chemical properties of different foods.

[0065] The detection module is used to detect samples and to detect samples sent into the liquid phase detector 12;

[0066] The results output and communication module is used to obtain sample results and store information results. After the test results are obtained, they are uploaded to the cloud for subsequent data comparison.

[0067] The cleaning module is used to clean residual samples, wash the residue of the previous sample food in the mixing chamber 7 and the sample outlet chamber 21 and discharge wastewater.

[0068] The specific implementation process is as follows: First, image information of the sample food is acquired. The recognition module compares and identifies the image information. The control module controls the operation of each component in the device box 401. The pretreatment module stirs the sample food and mixes it thoroughly with the corresponding solvent. The detection module performs chromatographic detection on the sample food after pretreatment. The result output and communication module displays the detection results and stores the information for subsequent data retrieval and comparison. The cleaning module cleans the residue of the previous sample food and discharges wastewater to avoid affecting the detection results of the next sample. This achieves fully automated identification and cleaning of sample food.

[0069] Example 3

[0070] The difference from the above embodiments is that, as Figure 1 As shown, an automated rapid detection method for harmful substances in food includes the following steps:

[0071] Step 1, Data Acquisition: The sampling module acquires and collects images of the food below the recognition box 2. Then, the image information transmitted to the recognition module is used for database comparison and judgment. The physicochemical properties of the corresponding food sample are then retrieved. Based on the type of solvent that needs to be mixed with the food sample, the data is transmitted to the preprocessing module, which then adds the corresponding solvent.

[0072] Step 2, Pre-treatment: After the sample food enters the mixing chamber 7, the motor 14 starts to work. The blades 17 in the mixing chamber 7 crush the sample food. At the same time, the data information of the sample food is transmitted to the pre-treatment module. The reversing valve 30 extracts the solvent from the corresponding test tube 32 according to the required solvent. After being fully mixed with the sample food in the mixing chamber 7, the solvent enters the sample outlet chamber 21. After being completely crushed and mixed, the control module opens the liquid outlet valve 22 to realize the pre-processing work of the sample before it is sent for testing.

[0073] Step 3, Sample detection: The sample delivered from the outlet valve 22 enters the liquid phase detector 12 through the sample delivery assembly. The liquid sample components are pumped into the chromatographic column as the mobile phase through the high-pressure delivery system. The packing material in the chromatographic column is used to separate the components from each other. The separated components will be detected by the detector at the outlet of the chromatographic column. The detector will measure the content of these components and output the results.

[0074] Step 4, Output and Storage: The analytes detected by the liquid phase detector 12 will generate a liquid chromatogram in the result output and communication module. At the same time, the data on whether the sample contains harmful substances will be saved to the cloud for future data comparison with similar foods.

[0075] Step 5, cleaning and wastewater discharge: While the sample is being tested, the liquid outlet valve 22 is closed, the first water pump 25 pumps water into the clean water tank 27 and delivers it to the stirring chamber 7 and the sample outlet chamber 21 to clean the residual sample, and then the wastewater is pumped into the wastewater tank 34 by the second water pump 35.

[0076] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0077] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An automated rapid detection device for harmful substances in food, characterized in that: It includes an automated detection system and a sample preparation device. The automated detection system is connected to the sample preparation device by signal. The sample preparation device includes an identification sampling component, a sample delivery component, and a cleaning component for cleaning residual samples. The bottom of the identification sampling component is fixedly connected to a support box. The support box contains several device boxes. Pretreatment components are symmetrically arranged in the device boxes. The cleaning component is located between the symmetrical pretreatment components. The pretreatment component includes a stirring component. The sample delivery component is located below the support box. The end of the sample delivery component away from the support box is detachably connected to a liquid phase detector for detecting harmful substances in food. The cleaning component includes a liquid tank, which is divided into a first chamber and a second chamber from top to bottom. The first chamber contains a clean water component, and there are symmetrical liquid delivery components on both sides of the clean water component. The two ends of the liquid delivery components are connected to the clean water component and the stirring component, respectively. The second chamber contains a wastewater component, and there is a wastewater pipe connecting the wastewater component and the stirring component.

2. The automated rapid detection device for harmful substances in food according to claim 1, characterized in that: The identification sampling component includes an electric turntable, a through plate, and an identification box. The bottom of the electric turntable is rotatably connected to a drive plate. The side of the drive plate away from the electric turntable is fixedly connected to the through plate. The bottom of the through plate is fixedly connected to a support box. The lower part of the identification box is fixedly connected to one side of the support box. The top of the identification box is located above the electric turntable. An identifier is installed on the top wall inside the identification box.

3. The automated rapid detection device for harmful substances in food according to claim 2, characterized in that: Several trays that can be retracted into the electric turntable are slidably connected to it. Several push-pull grooves corresponding to the trays are opened on the electric turntable. A first electric push rod is detachably connected to the inner side wall of each push-pull groove. Several drop grooves corresponding to the push-pull grooves are opened on the through plate. The top of the drop groove is rotatably connected to the electric turntable. The bottom of the drop groove is connected to the top of the pretreatment component. A weighing sensor is detachably connected to one side of the top of the drop groove. The top of the weighing sensor is rotatably connected to the electric turntable. The first electric push rod is signal connected to the weighing sensor. A tray controller is detachably connected inside the through plate.

4. The automated rapid detection device for harmful substances in food according to claim 3, characterized in that: The mixing assembly includes a mixing chamber and a sample outlet chamber that are connected from top to bottom. The top of the mixing chamber has a sample inlet that is connected to the lower drop trough. A motor is detachably connected to the top of the mixing chamber. A second electric push rod is coaxially fixedly connected to the output shaft of the motor. The end of the second electric push rod away from the motor passes through the top wall of the mixing chamber and is detachably connected to a rotating rod. Several blades for mixing and chopping are fixedly connected to the rotating rod. The inner wall of the mixing chamber is provided with a heating layer, and several heating wires are installed in the heating layer.

5. The automated rapid detection device for harmful substances in food according to claim 4, characterized in that: Each liquid delivery assembly includes a solvent tank and an inlet pipe. The solvent tank is symmetrically arranged in the first chamber. The two ends of the inlet pipe are connected to the stirring chamber and the solvent tank, respectively. A first water pump is installed on the inlet pipe and is detachably connected to the top of the solvent tank. One end of the inlet pipe inside the solvent tank is connected to a reversing valve. The end of the reversing valve away from the first water pump is connected to several glass tubes. A test tube rack is fixedly connected inside the solvent tank. Several test tubes are installed on the test tube rack. The ends of the glass tubes away from the reversing valve are all inserted into the test tubes.

6. The automated rapid detection device for harmful substances in food according to claim 5, characterized in that: A filter screen is detachably connected to the connection between the stirring chamber and the sample outlet chamber. A guide plate is fixedly connected below the filter screen. A liquid outlet is fixedly connected below the guide plate. The liquid outlet is connected to the bottom of the device box. A wastewater valve is provided at the end of the liquid outlet near the guide plate. A liquid outlet valve is fixedly connected at the end of the liquid outlet away from the guide plate. A dripping pipe is fixedly connected to the bottom of the liquid outlet.

7. The automated rapid detection device for harmful substances in food according to claim 6, characterized in that: The sample delivery assembly includes a support frame, a conveyor belt slidably connected to the support frame, several drive rollers rotatably connected inside the conveyor belt, and the end of the conveyor belt away from the support box is detachably connected to the liquid phase detector. The liquid phase detector has a detection port, and the conveyor belt communicates with the detection port.

8. The automated rapid detection device for harmful substances in food according to claim 7, characterized in that: The water purification assembly includes a water purification tank, which is detachably connected to the bottom of the first chamber. A water pipe connects the water purification tank to the reversing valve. The wastewater assembly includes a wastewater tank, which is detachably connected to the bottom of the second chamber. Both ends of the wastewater pipe connect the wastewater tank and the wastewater valve, respectively. A second water pump is connected to the wastewater pipe.

9. The automated rapid detection device for harmful substances in food according to claim 8, characterized in that: The automated detection system includes a sampling module, an identification module, a preprocessing module, a detection module, a result output and communication module, and a cleaning module; The sampling module is used to collect image information of food entering the identification box; The recognition module is used to receive the collected food image information and perform data comparison and recognition on the image information; The control module is used to control the pretreatment and cleaning components within the device housing; The pretreatment module is used to process samples by adding appropriate solvents to address the different chemical properties of different foods. The detection module is used to detect samples and to test samples sent into the liquid phase detector. The results output and communication module is used to obtain sample results and store information results. After the test results are obtained, they are uploaded to the cloud for subsequent data comparison. The cleaning module is used to clean residual samples, wash the residue of the previous sample food in the mixing chamber and the sample outlet chamber, and discharge wastewater.

10. An automated and rapid detection method for harmful substances in food, characterized in that: Includes the following steps: Step 1, Data Acquisition: The sampling module acquires and collects images of the food below the recognition box. Then, the image information transmitted to the recognition module is compared and judged against the database. The physicochemical properties of the corresponding food sample are then retrieved. Based on the type of solvent that needs to be mixed with the food sample, the data is transmitted to the preprocessing module, which adds the corresponding solvent. Step 2, Pre-treatment: After the sample food enters the mixing chamber, the motor starts working, and the blades in the mixing chamber crush the sample food. At the same time, the data information of the sample food is transmitted to the pre-treatment module. The reversing valve is used to extract the solvent from the corresponding test tube according to the required solvent. After being fully mixed with the sample food in the mixing chamber, the solvent enters the sample outlet chamber. After being completely crushed and mixed, the control module opens the liquid outlet valve to realize the pre-processing of the sample before it is sent for testing. Step 3, Sample detection: The sample delivered from the outlet valve enters the liquid phase detector through the sample delivery assembly. The liquid sample components are pumped into the chromatographic column as the mobile phase through the high-pressure delivery system. The packing material in the chromatographic column is used to separate the components from each other. The separated components will be detected by the detector at the outlet of the chromatographic column. The detector will measure the content of these components and output the results. Step 4, Output and Storage: The analytes detected by the liquid phase detector will generate a liquid chromatogram in the result output and communication module. At the same time, the data on whether the sample contains harmful substances will be saved to the cloud for future data comparison with similar foods. Step 5, Cleaning and Discharge: While the sample is being tested, the liquid outlet valve is closed. The first water pump draws water from the clean water tank and delivers it to the mixing chamber and the sample outlet chamber to clean the residual sample. Then, the second water pump pumps the wastewater to the wastewater tank.

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