Agricultural product heavy metal micro-open detection device based on intelligent sensor

Abstract

The application belongs to the technical field of heavy metal detection of agricultural products, and particularly relates to a heavy metal micro-open detection device for agricultural products based on an intelligent sensor, which comprises a detection main body, a digestion mechanism arranged in the detection main body, and agricultural products filled in the digestion mechanism. The cooperation of the detection main body and the crushing mechanism can not only close the digestion mechanism, but also crush the agricultural products for releasing heavy metals into digestion reagents. The cooperation of the detection main body and the dosing device can quantitatively add the digestion reagents into the digestion mechanism without manual measurement through complex operations, which helps to increase the detection speed. The cooperation of the detection main body and the detection assembly can send the intelligent sensor into the juice for detection by the intelligent sensor, and the detection process is automatically completed, which reduces the participation of people in the whole detection process, reduces the workload of people on one hand and reduces human errors and improves the detection accuracy on the other hand.

Description

Technical Field

[0001] This invention relates to the field of heavy metal detection technology in agricultural products, and in particular to a micro-open detection device for heavy metals in agricultural products based on intelligent sensors. Background Technology

[0002] In the planting and processing of agricultural products, heavy metals such as lead, cadmium, and mercury in the soil and irrigation water can easily accumulate and remain inside crops. Long-term consumption of agricultural products with excessive heavy metals can seriously damage human health. Therefore, it is necessary to test the heavy metal content in agricultural products. During the testing process, people first use an electronic scale to accurately weigh some agricultural products, then use a crusher to break them up. Next, the amount of digestion reagent to be added is calculated based on the weight of the agricultural products. Then, a pipette is used to accurately measure the digestion reagent and add it to the container holding the agricultural products. The mixture is then heated and stirred to promote the transfer of heavy metals from the agricultural products to the digestion reagent. After filtering out the residue from the digestion reagent, the filtrate is placed in a heavy metal detection device. The intelligent sensor in the heavy metal detection device detects the heavy metal content in the filtrate and outputs the test results.

[0003] While the above-mentioned detection methods can achieve the purpose of detecting heavy metal content in agricultural products, they require too much equipment, are complicated to operate, and rely on professional personnel and fixed testing sites, making them unsuitable for mobile testing scenarios such as fields and farmers' markets.

[0004] Therefore, we propose a micro-open detection device for heavy metals in agricultural products based on intelligent sensors to meet the needs of integrated and rapid on-site detection. Summary of the Invention

[0005] To overcome the above-mentioned shortcomings in the prior art, the present invention aims to provide a micro-open detection device for heavy metals in agricultural products based on intelligent sensors. This device integrates automatic weighing, mechanical crushing, quantitative dosing, micro-open digestion, in-situ solid-liquid separation, and self-cleaning functions into one unit. It eliminates the need for multiple equipment operation modes, reduces manual intervention, and eliminates the dependence on professional personnel and fixed testing sites, making it suitable for mobile testing scenarios in fields and farmers' markets.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: A micro-open detection device for heavy metals in agricultural products based on intelligent sensors includes a detection body, an internal digestion mechanism, agricultural products being filled inside the digestion mechanism, a weighing mechanism for detecting the weight of the agricultural products at the bottom of the digestion mechanism, a crushing mechanism for crushing the agricultural products between the digestion mechanism and the weighing mechanism, a calibration structure for calibrating the calibration position on the outside of the digestion mechanism, a dosing device for quantitatively adding reagents on both sides of the top of the digestion mechanism, a detection component on the top surface of the digestion mechanism, the bottom end of the detection component extending into the digestion mechanism and having a separation mechanism, and a distributor located above the separation mechanism inside the digestion mechanism.

[0007] Preferably, the detection body includes a shell, a shoulder strap is rotatably mounted on the top right side of the shell, the other end of the shoulder strap is rotatably mounted on the top left side of the shell, the front end of the shell is open, a panel is bolted to the front side of the shell, the panel seals the opening at the front end of the shell, a touch screen and a flip door are mounted on the surface of the panel, a control module is mounted on the right end of the bottom surface of the inner cavity of the shell, a battery is mounted on the left end of the bottom surface of the inner cavity of the shell, and a vent is opened on the rear end of the shell at its top.

[0008] Preferably, the digestion mechanism includes a digestion cylinder located between the control module and the battery. The digestion cylinder is positioned above the weighing mechanism and the crushing mechanism. Agricultural products are filled inside the digestion cylinder. The top of the digestion cylinder is open. A sealing cylinder is provided on the upper side of the digestion cylinder. A detection component is located on the top surface of the sealing cylinder. Two dosing devices are respectively located on both sides of the space above the sealing cylinder. The bottom of the sealing cylinder is open. A docking annular groove is formed on the bottom surface of the sealing cylinder. The top of the digestion cylinder is slidably inserted into the docking annular groove. The top wall of the docking annular groove is inclined with a higher outer edge and a lower inner edge. The top surface of the digestion cylinder is inclined with a lower outer edge and a higher inner edge. The top surface of the digestion cylinder is in contact with the top wall of the docking annular groove.

[0009] Preferably, the weighing mechanism includes a base ring, which is fixedly connected to the bottom surface of the inner cavity of the outer shell. A bearing plate is slidably inserted inside the base ring. A pressure sensor is fixedly connected to the bottom surface of the bearing plate. A weighing tube is fixedly connected to the top surface of the bearing plate. An expansion cylinder is fixedly connected to the top of the weighing tube. The top of the expansion cylinder is open. Four weighing arms are equally spaced on the side of the weighing tube.

[0010] Preferably, the crushing mechanism includes a support plate, which is slidably inserted into the weighing tube. Four L-shaped legs are fixedly connected at equal intervals on the side of the support plate, and the four L-shaped legs correspond one-to-one with the four weighing arms. The other end of the L-shaped legs passes through the corresponding weighing arm, bends downward, and is fixedly connected to the bottom surface of the inner cavity of the outer shell. Three electric telescopic rods are fixedly connected at equal intervals along the circumferential direction on the top surface of the support plate. The top of the three electric telescopic rods is fixedly connected to the same displacement platform, which is slidably inserted into the weighing tube. The bottom surface of the displacement platform has an embedding groove, and the top surface of the displacement platform has a central hole that communicates with the embedding groove. A crushing motor is embedded in the embedding groove. A bevel gear is fixedly connected to the top surface of the output shaft of the crushing motor. The bottom surface of the digestion cylinder is in contact with the top surface of the displacement platform. A rotating hole is opened on the bottom surface of the digestion cylinder, and a rotating shaft is rotatably installed inside the rotating hole. A conical toothed hole is opened on the bottom surface of the rotating shaft, and the bevel gear is inserted into the conical toothed hole and meshes with each other. The top of the rotating shaft extends into the digestion cylinder and is fixedly installed with a crushing blade.

[0011] Preferably, the calibration structure includes a temporary storage plate located between the control module and the battery. The back of the temporary storage plate is fixedly connected to the back of the inner cavity of the outer casing. A calibration hole is provided on the top surface of the temporary storage plate, through which the digestion cylinder and the displacement stage can pass. Two calibration plates are fixedly connected to the top surface of the temporary storage plate, located on both sides of the calibration hole. The two adjacent sides of the two calibration plates are tangent to the inner wall of the calibration hole. A calibration platform is fixedly connected between the two ends of the two calibration plates away from the panel. The back of the calibration platform is fixedly connected to the back of the inner cavity of the outer casing. An arc-shaped groove is provided on the surface of the calibration platform near the calibration plates. The two adjacent sides of the two calibration plates are tangent to the inner wall of the arc-shaped groove. The inner wall of the arc-shaped groove is in sliding contact with the surface of the digestion cylinder.

[0012] Preferably, the dosing device includes a storage cylinder, which is fixedly connected to the top surface of the inner cavity of the outer shell. The top surface of the outer shell has an insertion hole communicating with the storage cylinder. A docking cap is fixedly connected to the bottom end of the storage cylinder, and a rigid tube is fixedly connected to the bottom end of the docking cap. The other end of the rigid tube is fixedly connected to the top of the side of the sealing cylinder. A plunger sampling pump is installed on the rigid tube. A liquid storage cylinder is inserted into the storage cylinder, and the digestion reagent is stored inside the liquid storage cylinder. A docking nozzle is provided at the bottom end of the liquid storage cylinder, and the docking nozzle is threadedly installed inside the docking cap. The top end of the liquid storage cylinder is exposed outside the outer shell.

[0013] Preferably, the detection component includes a sliding hole located in the middle of the top surface of the sealing cylinder. An internally threaded cylinder is inserted into the sliding hole, and a threaded rod is installed inside the internally threaded cylinder with a threaded fit. A drive motor is fixedly connected to the top of the threaded rod, and the top of the drive motor is bolted to the top surface of the inner cavity of the outer shell. An extension cylinder is fixedly connected to the bottom of the internally threaded cylinder. Two long boxes are fixedly connected symmetrically to the outer surfaces of the extension cylinder and the internally threaded cylinder. The long boxes are slidably inserted into the sliding hole. An open opening is formed between the surface of the internally threaded cylinder, the inner wall of the sliding hole, and the side of the long boxes. A wire-passing hole is provided on the inner wall of the extension cylinder, which communicates with the inner cavity of the long boxes. An installation hole is provided at the center of the bottom surface of the extension cylinder, and a smart sensor is installed inside the installation hole with a threaded fit. Four protective strips are fixedly connected to the bottom surface of the extension cylinder, and the same protective ring is fixedly connected to the bottom of the four protective strips. A separation mechanism is installed at the bottom of the protective ring. There are shielding strips on both sides of the long boxes, which are fixedly connected to the inner wall of the sliding hole. A guide hole is formed between two shielding strips, and the long boxes are slidably inserted into the guide hole.

[0014] Preferably, the separation mechanism includes a separation disc, which is slidably inserted into the sealing cylinder. A receiving groove is provided on the bottom surface of the separation disc, and a pressing disc is threadedly installed inside the receiving groove. A clamping cavity is formed inside the receiving groove, and filter paper is installed inside the clamping cavity. Separation holes are provided on both the separation disc and the pressing disc, and through holes are provided in the middle of both the separation disc and the pressing disc. A mounting bolt is inserted into the through hole, and the top of the mounting bolt is threadedly installed inside the protective ring.

[0015] Preferably, the distributor includes a distribution disc, which is fixedly connected to the inner wall of the sealing cylinder and located above the separation disc. A distribution cavity is formed above the distribution disc, and a rigid tube communicates with the distribution cavity. A conical groove is formed on the top surface of the distribution disc, and a leakage hole is provided at the bottom end of the conical groove. A distribution ring is fixedly connected to the inner wall of the conical groove. An internal threaded cylinder and a long strip box can pass through the leakage hole. An extension cylinder is located above the leakage hole. An annular slit is formed between the top surface of the distribution ring and the top surface of the inner cavity of the sealing cylinder. A compensation hole is formed at the bottom of the distribution ring.

[0016] The beneficial effects of this invention are as follows: 1. This invention uses a digestion mechanism to hold agricultural products, and a detection body and a weighing mechanism to weigh the agricultural products, eliminating the need for manual pre-weighing. The detection body, in conjunction with a crushing mechanism, not only closes the digestion mechanism but also crushes the agricultural products, releasing heavy metals into the digestion reagent. The detection body, in conjunction with a dosing device, quantitatively adds the digestion reagent to the digestion mechanism, eliminating the need for complex manual measurements and increasing detection speed. The detection body, in conjunction with detection components, allows a smart sensor to be inserted into the juice for detection. The entire detection process is automated, reducing human involvement throughout the process, decreasing workload, minimizing human error, and improving detection accuracy.

[0017] 2. This invention, through its calibration structure, enables people to quickly and accurately install the digestion mechanism. The detection waste liquid and cleaning waste liquid are removed by disassembling the digestion cylinder. The operation is simple and convenient, saving time and effort. The cooperation between the detection component and the separation mechanism can separate the juice and the residue, so that the intelligent sensor only contacts the juice and avoids the residue from covering the intelligent sensor, thus improving the detection accuracy. The detachable structure of the separation mechanism makes it convenient to replace the filter paper.

[0018] 3. This invention, through a distributor, can spray the digestion reagent injected into the digestion mechanism by the dosing device from any direction in the circumferential direction onto the internal threaded cylinder, intelligent sensor, and protective strip, thereby cleaning the internal threaded cylinder, intelligent sensor, and protective strip and preparing them for the next test. On the one hand, it eliminates the need for manual cleaning of the internal threaded cylinder, intelligent sensor, and protective strip, saving time and effort; on the other hand, it removes juice residue and improves the accuracy of the test. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the split structure; Figure 3 For the present invention Figure 2 A three-dimensional structural diagram of the inner and outer shell; Figure 4 For the present invention Figure 3 A three-dimensional structural diagram of the inner and outer shell; Figure 5 For the present invention Figure 3 A three-dimensional structural diagram of the digestion mechanism; Figure 6 For the present invention Figure 5 A schematic diagram of the three-dimensional structure after being cut along the center plane; Figure 7 For the present invention Figure 5 A three-dimensional structural diagram of the digestion chamber; Figure 8 For the present invention Figure 7 A schematic diagram of the three-dimensional structure from another perspective; Figure 9 For the present invention Figure 5 A three-dimensional structural diagram of the weighing and crushing mechanisms; Figure 10 For the present invention Figure 9 A schematic diagram of the three-dimensional structure from another perspective; Figure 11 For the present invention Figure 9 A schematic diagram of the three-dimensional structure after being cut along the center plane; Figure 12 For the present invention Figure 5 A three-dimensional structural diagram of the drug delivery device and detection components; Figure 13 For the present invention Figure 12 A three-dimensional structural diagram of the disassembled detection components, separation mechanism, distributor, and sealing cylinder; Figure 14 For the present invention Figure 13 A three-dimensional structural diagram of the central sealing cylinder; Figure 15 For the present invention Figure 13 A three-dimensional structural diagram of the distributor; Figure 16 For the present invention Figure 13 A schematic diagram of the three-dimensional structure of the detection component after being cut along the central plane; Figure 17 For the present invention Figure 13 A schematic diagram of the three-dimensional structure of the separation mechanism after being cut along the central plane.

[0020] In the diagram: 1. Detection body; 101. Outer shell; 102. Shoulder strap; 103. Panel; 104. Touch screen; 105. Flip-up door; 106. Control module; 107. Battery; 108. Vent hole; 2. Digestion mechanism; 201. Digestion cylinder; 202. Sealing cylinder; 203. Connecting ring groove; 3. Weighing mechanism; 301. Base ring; 302. Bearing plate; 303. Pressure sensor; 304. Weighing tube; 305. Expanding cylinder; 306. Weighing arm; 4. Crushing mechanism; 401. Support plate; 402. L-shaped support leg; 403. Electric telescopic rod; 404. Displacement table; 405. Insertion slot; 406. Center hole; 407. Crushing motor; 408. Bevel gear; 409. Rotating hole; 410. Rotating shaft; 411. Conical toothed hole; 412. Crushing blade; 5. Calibration structure; 501. Temporary storage plate; 502. Calibration hole; 503. Calibration plate; 504. Calibration platform; 505. Arc-shaped groove; 6. Dosing device; 601. Storage cylinder; 602. Connecting cap; 603. Rigid tubing; 604. Plunger sampling pump; 605. Liquid reservoir; 7. Detection components; 701. Sliding hole; 702. Internal threaded cylinder; 703. Threaded rod; 704. Drive motor; 705. Extension cylinder; 706. Long box; 707. Threading hole; 708. Mounting hole; 709. Smart sensor; 710. Protective strip; 711. Protective ring; 712. Shielding strip; 713. Guide hole; 8. Separation mechanism; 801. Separation disc; 802. Separation hole; 803. Receiving groove; 804. Pressing disc; 805. Mounting bolts; 9. Distributor; 901. Distribution disc; 902. Conical groove; 903. Leakage hole; 904. Distribution ring; 905. Compensation hole. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In this embodiment, refer to Figure 1-17 This solution provides a micro-open detection device for heavy metals in agricultural products based on intelligent sensors. It includes a detection body 1, a digestion mechanism 2 inside the detection body 1, agricultural products are filled inside the digestion mechanism 2, a weighing mechanism 3 for detecting the weight of agricultural products is located at the bottom of the digestion mechanism 2, a crushing mechanism 4 for crushing agricultural products is located between the digestion mechanism 2 and the weighing mechanism 3, a calibration structure 5 for calibrating the calibration position is located on the outside of the digestion mechanism 2, a dosing device 6 for quantitatively adding reagents is located on both sides of the top of the digestion mechanism 2, a detection component 7 is located on the top surface of the digestion mechanism 2, the bottom end of the detection component 7 extends into the digestion mechanism 2 and is provided with a separation mechanism 8, and a distributor 9 located on the upper side of the separation mechanism 8 is located inside the digestion mechanism 2.

[0023] In use, firstly, the digestion mechanism 2 is removed, then the agricultural products are loaded into it. Next, the digestion mechanism 2 is reinstalled. Then, the calibration structure 5 guides the digestion mechanism 2 during installation, ensuring proper alignment. The detection body 1 then weighs the agricultural products in the digestion mechanism 2 using the weighing mechanism 3. Next, the detection body 1 merges the digestion mechanism 2 using the crushing mechanism 4. Then, the detection body 1 controls the dosing device 6 to add a quantitative amount of digestion reagent to the digestion mechanism 2 based on the weight of the agricultural products. The digestion reagent falls onto the distributor 9 and drops from its center. Next, the detection body 1 controls the crushing mechanism 4 to crush the agricultural products in the digestion mechanism 2, forming juice and residue. After crushing, the detection body 1 controls the crushing mechanism 4 to stop operating. Then, the detection body 1 controls the detection component 7 to extend and push the separation mechanism 8 downwards. The separation mechanism 8 is then immersed in the juice. Under hydraulic pressure, the juice enters the upper cavity of the separation mechanism 8, while the residue is intercepted in the lower cavity. Then, the detection component... After the detection component 7 extends to its longest state, the detection body 1 controls the detection component 7 to stop operating. At this time, the bottom of the detection component 7 is immersed in the juice. Then, the detection body 1 detects the heavy metal content in the juice through the detection component 7, and then records and displays the detection results. Next, the detection body 1 controls the dosing device 6 to continuously inject the digestion reagent. The digestion reagent impacts the surface of the detection component 7 through the distributor 9 to clean the detection component 7. Then, the detection body 1 controls the detection component 7 to shorten, and then the detection component 7 moves upward with the separation mechanism 8. The juice flows back downward through the filter paper and the separation hole 802. Then, the separation mechanism 8 is separated from the juice. Then, the newly injected digestion reagent falls on the top surface of the separation mechanism 8 and passes through the separation mechanism 8 to clean the separation mechanism 8. Then, the detection component 7 shortens to its shortest state. Then, the detection body 1 controls the dosing device 6 to stop injecting. Then, the digestion mechanism 2 is taken out, and then the mixture in the digestion mechanism 2 is poured into the waste liquid tank. Then, the digestion mechanism 2 is cleaned and then put back into its original position.

[0024] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4The detection body 1 includes a housing 101. A shoulder strap 102 is rotatably mounted on the top right side of the housing 101. The shoulder strap 102 can be carried by hand or draped over the shoulder for easy transport of the detection device. The other end of the shoulder strap 102 is rotatably mounted on the top left side of the housing 101. The front end of the housing 101 is open. A panel 103 is bolted to the front side of the housing 101, sealing the opening at the front end of the housing 101. A touch screen 104 and a flip door 105 are mounted on the surface of the panel 103. A control module 106 is mounted on the right side of the bottom surface of the inner cavity of the housing 101. The control module 106 is electrically connected to the lines between the touch screen 104 and various electrical components. A storage battery 107 is mounted on the left side of the bottom surface of the inner cavity of the housing 101, providing power to the various electrical components. A vent 108 is opened on the rear end of the housing 101 at its top.

[0025] When the digestion mechanism 2 is removed, the crushing mechanism 4 is controlled to fall back using the touch screen 104, and then the digestion mechanism 2 is released. Then the flip door 105 is opened, and the digestion mechanism 2 is removed.

[0026] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 12 , Figure 13 and Figure 14 The digestion mechanism 2 includes a digestion cylinder 201, which is located between the control module 106 and the battery 107. A heating wire is wound around the outside of the digestion cylinder 201, and a temperature sensor is embedded in the outside of the digestion cylinder 201. Both the heating wire and the temperature sensor are electrically connected to the touch screen 104. The heating wire heats the digestion reagent during the crushing process. The touch screen 104 controls whether the heating wire operates based on the signal fed back from the temperature sensor, thereby controlling the temperature of the digestion reagent. The digestion cylinder 201 is located above the weighing mechanism 3 and the crushing mechanism 4. Agricultural products are filled inside the digestion cylinder 201. The top of the digestion cylinder 201 is open, and a seal is provided on the upper side of the digestion cylinder 201. The sealing cylinder 202 has a detection component 7 on its top surface and two dosing devices 6 on either side of the space above it. The bottom of the sealing cylinder 202 is open and has a docking ring groove 203 on its bottom surface. The top of the digestion cylinder 201 is slidably inserted into the docking ring groove 203. The top wall of the docking ring groove 203 is inclined with a higher outer edge and a lower inner edge, and the top surface of the digestion cylinder 201 is inclined with a lower outer edge and a higher inner edge. The top surface of the digestion cylinder 201 is in contact with the top wall of the docking ring groove 203. This special structural design can prevent the juice from overflowing along the inner wall of the digestion mechanism 2, and the liquid level of the juice does not exceed half of the digestion cylinder 201.

[0027] When the digestion mechanism 2 is removed, the digestion cylinder 201 is removed, and the agricultural products are filled in the digestion cylinder 201.

[0028] Please see Figure 3 , Figure 9 , Figure 10 and Figure 11 The weighing mechanism 3 includes a base ring 301, which is fixedly connected to the bottom surface of the inner cavity of the outer shell 101. A bearing plate 302 is slidably inserted inside the base ring 301. A pressure sensor 303 is fixedly connected to the bottom surface of the bearing plate 302. The pressure sensor 303 is electrically connected to the touch screen 104. A weighing tube 304 is fixedly connected to the top surface of the bearing plate 302. An expansion cylinder 305 is fixedly connected to the top of the weighing tube 304. The digestion cylinder 201, the expansion cylinder 305, the weighing tube 304, the bearing plate 302, the base ring 301, and the pressure sensor 303 share a common central axis. The top of the expansion cylinder 305 is open. The bottom of the digestion cylinder 201 can be inserted into the expansion cylinder 305. Four weighing arms 306 are equally spaced on the side of the weighing tube 304.

[0029] When the digestion mechanism 2 is put back into its original position, the bottom end of the digestion cylinder 201 is inserted into the expansion cylinder 305. Then, the weight of the digestion cylinder 201 and the agricultural products inside it is applied to the pressure sensor 303 through the expansion cylinder 305, the weighing tube 304, and the bearing plate 302. Then, the touch screen 104 weighs the agricultural products through the pressure sensor 303.

[0030] Please see Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11The crushing mechanism 4 includes a support plate 401, which is slidably inserted into the weighing tube 304. Four L-shaped legs 402 are fixedly connected at equal intervals on the side of the support plate 401, corresponding one-to-one with four weighing arms 306. The other end of each L-shaped leg 402 extends from its corresponding weighing arm 306, bends downward, and is fixedly connected to the bottom surface of the inner cavity of the outer shell 101. Three electric telescopic rods 4 are fixedly connected at equal intervals along the circumferential direction on the top surface of the support plate 401. 03. Three electric telescopic rods 403 are synchronously controlled by the touch screen 104. The top of each of the three electric telescopic rods 403 is fixedly connected to the same displacement platform 404. The displacement platform 404 is slidably inserted into the weighing tube 304. An arc plate is fixedly connected to the side of the displacement platform 404, and the arc plate is movably inserted into the weighing arm 306. The symmetrical weighing tube 304 is limited to prevent rotation. An embedding groove 405 is provided on the bottom surface of the displacement platform 404, and a central hole 40 is provided on the top surface of the displacement platform 404. 6. The center hole 406 communicates with the mounting groove 405. The mounting groove 405 is fitted with a crushing motor 407. The touch screen 104 controls the operation of the crushing motor 407. A bevel gear 408 is fixedly connected to the top surface of the output shaft of the crushing motor 407. The bottom surface of the digestion cylinder 201 is in contact with the top surface of the displacement stage 404. A rotation hole 409 is opened on the bottom surface of the digestion cylinder 201. A rotating shaft 410 is rotatably installed inside the rotation hole 409. The surface of the rotating shaft 410 is flush with the surface of the rotation hole 409. A sealing ring is provided between the inner walls of 09. A tapered toothed hole 411 is opened on the bottom surface of the rotating shaft 410. The bevel gear 408 is inserted into the tapered toothed hole 411 and meshes with each other. The top end of the rotating shaft 410 extends into the digestion cylinder 201 and a crushing knife 412 is fixedly installed thereon. The weighing tube 304, support plate 401, displacement stage 404, insert groove 405, center hole 406, bevel gear 408, rotating hole 409, rotating shaft 410, and tapered toothed hole 411 share a central axis.

[0031] After weighing, the touchscreen 104 controls the extension of the electric telescopic rod 403. The electric telescopic rod 403 then moves upward via the displacement table 404, carrying the crushing motor 407. Next, the bevel gear 408 inserts into the conical toothed hole 411 and meshes with it. Then, the top surface of the displacement table 404 abuts against the bottom surface of the digestion cylinder 201, lifting the digestion cylinder 201 upward. The top of the digestion cylinder 201 then inserts into the docking ring groove 203. Afterward, the bottom end of the digestion cylinder 201 is pulled out of the expanding cylinder 305, and the top surface of the digestion cylinder 201 then aligns with the docking ring groove 203. 3. After the top wall is attached, the touch screen 104 controls the dosing device 6 to inject the digestion reagent into the sealing cylinder 202. After the injection is completed, the touch screen 104 controls the crushing motor 407 to run. Then, the crushing motor 407 rotates through the meshing action between the bevel gear 408 and the conical tooth hole 411, and the rotating shaft 410 drives the crushing blade 412 to rotate. Then the crushing blade 412 crushes the agricultural product, so that the heavy metals in the agricultural product enter the digestion reagent. The touch screen 104 has a crushing time set inside. When the crushing is finished, the touch screen 104 controls the crushing motor 407 to stop.

[0032] Please see Figure 3 and Figure 4 The calibration structure 5 includes a temporary storage plate 501, which is located between the control module 106 and the battery 107. The back of the temporary storage plate 501 is fixedly connected to the back of the inner cavity of the outer casing 101. The temporary storage plate 501 is horizontal, and a calibration hole 502 is opened on the top surface of the temporary storage plate 501. The calibration hole 502 shares a central axis with the digestion cylinder 201. The digestion cylinder 201 and the displacement stage 404 can both pass through the calibration hole 502. Two calibration plates 503 are fixedly connected to the top surface of the temporary storage plate 501. The two calibration plates 503 are located on both sides of the calibration hole 502, and the two calibration plates 503 are close to each other. The two calibration plates 503 are tangent to the inner wall of the calibration hole 502. A calibration platform 504 is fixedly connected between the two ends of the two calibration plates 503 away from the panel 103. The length of the calibration platform 504 is less than the diameter of the calibration hole 502, ensuring that the opening between the two calibration plates 503 gradually increases. The back of the calibration platform 504 is fixedly connected to the back of the inner cavity of the outer shell 101. An arc-shaped groove 505 is opened on the surface of the calibration platform 504 near the calibration plate 503. The two sides of the two calibration plates 503 that are close to each other are tangent to the inner wall of the arc-shaped groove 505. The inner wall of the arc-shaped groove 505 slides in contact with the surface of the digestion cylinder 201.

[0033] When installing the digestion mechanism 2, the calibration plate 503 guides the digestion cylinder 201 until the surface of the digestion cylinder 201 abuts against the inner wall of the arc groove 505. At this time, the digestion cylinder 201 is coaxial with the calibration hole 502. Then, the digestion cylinder 201 is moved downward, and at this time, the digestion cylinder 201 can be accurately inserted into the expansion cylinder 305.

[0034] Please see Figure 4 , Figure 5 , Figure 6 , Figure 12 and Figure 13 The dosing device 6 includes a storage cylinder 601, which is fixedly connected to the top surface of the inner cavity of the outer shell 101. The top surface of the outer shell 101 has an insertion hole communicating with the storage cylinder 601. A docking cap 602 is fixedly connected to the bottom end of the storage cylinder 601. A rigid tube 603 is fixedly connected to the bottom end of the docking cap 602. The other end of the rigid tube 603 is fixedly connected to the top of the side of the sealing cylinder 202. A plunger sampling pump 604 is installed on the rigid tube 603. The touch screen 104 controls the operation of the plunger sampling pump 604. A liquid storage cylinder 605 is inserted into the storage cylinder 601. The digestion reagent is stored inside the liquid storage cylinder 605. A docking nozzle is provided at the bottom end of the liquid storage cylinder 605. The docking nozzle is threaded and installed inside the docking cap 602. The top end of the liquid storage cylinder 605 is exposed outside the outer shell 101. A one-way suction valve is installed on the top surface of the liquid storage cylinder 605 to avoid the formation of negative pressure inside the liquid storage cylinder 605 and the problem of difficulty in producing liquid.

[0035] When adding digestion reagent, the touch screen 104 calculates the amount of digestion reagent to be injected based on the weight data. Then, the touch screen 104 controls the plunger sampling pump 604 to run. The plunger sampling pump 604 quantitatively injects the digestion reagent in the storage cylinder 605 into the sealing cylinder 202 through the rigid tube 603. When the injection amount reaches the requirement, the touch screen 104 controls the plunger sampling pump 604 to stop.

[0036] Please see Figure 13 , Figure 14 and Figure 16The detection component 7 includes a sliding hole 701, which is located in the middle of the top surface of the sealing cylinder 202. An internally threaded cylinder 702 is inserted into the sliding hole 701. A threaded rod 703 is threadedly installed inside the internally threaded cylinder 702. A drive motor 704 is fixedly connected to the top of the threaded rod 703. The top of the drive motor 704 is bolted to the top surface of the inner cavity of the housing 101. The drive motor 704 is electrically connected to the touch screen 104. An extension cylinder 705 is fixedly connected to the bottom of the internally threaded cylinder 702. Two elongated boxes 706 are fixedly connected symmetrically to the outer surfaces of the extension tube 705 and the internally threaded tube 702. The top of the elongated box 706 is flush with the top surface of the internally threaded tube 702, and the bottom of the elongated box 706 is flush with the bottom surface of the extension tube 705. The elongated box 706 is slidably inserted into the sliding hole 701. An open opening is formed between the surface of the internally threaded tube 702, the inner wall of the sliding hole 701, and the side of the elongated box 706. The open opening is used for exhalation to release the gas generated during the heating process. A wire-passing hole 707 is provided on the inner wall, which communicates with the inner cavity of the long box 706. The wire-passing hole 707 and the inner cavity of the long box 706 are used to pass the cable between the smart sensor 709 and the control module 106. A mounting hole 708 is provided at the center of the bottom surface of the extension tube 705. The smart sensor 709 is installed in the mounting hole 708 with a threaded fit. The smart sensor 709 is electrically connected to the touch screen 104. Four protective strips 710 are fixedly connected to the bottom surface of the extension tube 705. The protective strips 710 are evenly distributed around the smart sensor 709. The bottom ends of the four protective strips 710 are fixedly connected to the same protective ring 711. The protective ring 711 is located below the smart sensor 709. The separation mechanism 8 is installed at the bottom of the protective ring 711. The long box 706 has shielding strips 712 on both sides. The shielding strips 712 are fixedly connected to the inner wall of the sliding hole 701. A guide hole 713 is formed between the two shielding strips 712. The long box 706 is slidably inserted into the guide hole 713.

[0037] After crushing, the touch screen 104 controls the drive motor 704 to run. Then, the drive motor 704 rotates the threaded rod 703. Subsequently, the internal threaded cylinder 702 moves downward under the action of the threaded engagement between itself and the threaded rod 703. Then, the internal threaded cylinder 702 moves downward along with the long box 706, the extension cylinder 705, the smart sensor 709, the protective strip 710, the protective ring 711, and the separation mechanism 8. Then, the separation mechanism 8 moves downward into the digestion cylinder 201 and is immersed in the mixture. After that, the juice passes through the separation mechanism 8, and the residue in the juice is trapped below the separation mechanism 8. Then, the smart sensor 709 is immersed in the juice. Then, the bottom surface of the separation mechanism 8 abuts against the top of the crushing blade 412, and the internal threaded cylinder 702 stops moving. Then, the touch screen 104 detects the heavy metal content in the juice through the smart sensor 709. Then, the touch screen 104 records and displays the detection results. After the detection is completed, the touch screen 104 controls the drive motor 704 to run in reverse. Then, the internal threaded cylinder 702 moves upward along with its components under the action of the threaded engagement until it returns to its original position.

[0038] Please see Figure 13 and Figure 17 The separation mechanism 8 includes a separation disc 801, which is slidably inserted into the sealing cylinder 202. A sealing ring is provided between the side of the separation disc 801 and the inner wall of the sealing cylinder 202. A receiving groove 803 is provided on the bottom surface of the separation disc 801. A pressing disc 804 is installed inside the receiving groove 803 with a threaded fit. A clamping cavity is formed inside the receiving groove 803. Filter paper is installed inside the clamping cavity. Separation holes 802 are provided on both the separation disc 801 and the pressing disc 804. A through hole is provided in the middle of both the separation disc 801 and the pressing disc 804. A mounting bolt 805 is inserted into the through hole. The top of the mounting bolt 805 is threaded and installed inside the protective ring 711.

[0039] When the detection component 7 moves downward with the separation mechanism 8, the juice passes through the filter paper and the separation hole 802 and enters the upper cavity of the separation mechanism 8, while the residue is intercepted below the filter paper. When the detection component 7 moves upward with the separation mechanism 8, the juice passes through the filter paper and the separation hole 802 and enters the lower cavity of the separation mechanism 8.

[0040] The threaded installation between the receiving groove 803 and the pressing plate 804 allows people to remove the pressing plate 804 to replace the filter paper, avoiding cross-contamination and increasing the accuracy of testing.

[0041] Please see Figure 6 , Figure 13 and Figure 15The distributor 9 includes a distribution disc 901, which is fixedly connected to the inner wall of the sealing cylinder 202 and located above the separation disc 801. A distribution cavity is formed above the distribution disc 901, and a rigid tube 603 communicates with the distribution cavity. A conical groove 902 is formed on the top surface of the distribution disc 901, and a leakage hole 903 is provided at the bottom end of the conical groove 902. A distribution ring 904 is fixedly connected to the inner wall of the conical groove 902. The leakage hole 903, the distribution ring 904 and the distribution disc 901 are coaxial and have internal threads. Both the cylinder 702 and the long box 706 can pass through the leakage hole 903. The extension cylinder 705 is located above the leakage hole 903 to ensure that the digesting reagent can impact the surface of the protective strip 710 and the smart sensor 709. An annular slit is formed between the top surface of the distribution ring 904 and the top surface of the inner cavity of the sealing cylinder 202. A compensation hole 905 is opened at the bottom of the distribution ring 904. The compensation hole 905 is used to discharge all the digesting reagent into the digestion cylinder 201 and will not leave any residue in the conical groove 902.

[0042] When the digesting reagent is injected, the rigid tube 603 injects the digesting reagent into the distribution cavity at a speed greater than the flow speed through the compensation hole 905. Then, the liquid level in the outer chamber of the distribution ring 904 gradually rises. Next, the digesting reagent overflows from the annular slit on the top surface of the distribution ring 904 into the inner chamber of the distribution ring 904. After that, the digesting reagent flows towards the leakage hole 903 without dead angles in the circumferential direction. Then, the digesting reagent impacts the internal threaded cylinder 702, the long strip box 706, the extension cylinder 705, the smart sensor 709, the protective strip 710, and the protective ring 711, rinsing these structures to prevent juice residue from affecting the next test.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A micro-open detection device for heavy metals in agricultural products based on intelligent sensors, comprising a detection body (1), characterized in that, The detection body (1) is equipped with a digestion mechanism (2) inside. Agricultural products are filled inside the digestion mechanism (2). The bottom of the digestion mechanism (2) is equipped with a weighing mechanism (3) for detecting the weight of agricultural products. Between the digestion mechanism (2) and the weighing mechanism (3) is a crushing mechanism (4) for crushing agricultural products. The outside of the digestion mechanism (2) is equipped with a calibration structure (5) for calibration position. Both sides of the top of the digestion mechanism (2) are equipped with a dosing device (6) for quantitative addition of reagents. The top surface of the digestion mechanism (2) is equipped with a detection component (7). The bottom end of the detection component (7) extends into the digestion mechanism (2) and is equipped with a separation mechanism (8). The inside of the digestion mechanism (2) is equipped with a distributor (9) located on the upper side of the separation mechanism (8).

2. The micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 1, characterized in that, The detection body (1) includes a shell (101), a shoulder strap (102) is foldably mounted on the top right side of the shell (101), the other end of the shoulder strap (102) is foldably mounted on the top left side of the shell (101), the front end of the shell (101) is open, a panel (103) is bolted to the front side of the shell (101), the panel (103) seals the opening at the front end of the shell (101), a touch screen (104) and a flip door (105) are mounted on the surface of the panel (103), a control module (106) is mounted on the right end of the bottom surface of the inner cavity of the shell (101), a battery (107) is mounted on the left end of the bottom surface of the inner cavity of the shell (101), and a vent hole (108) is opened on the rear end of the shell (101) at its top.

3. The micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 2, characterized in that, The digestion mechanism (2) includes a digestion cylinder (201), which is located between the control module (106) and the battery (107). The digestion cylinder (201) is located above the weighing mechanism (3) and the crushing mechanism (4). Agricultural products are filled inside the digestion cylinder (201). The top of the digestion cylinder (201) is open. A sealing cylinder (202) is provided on the upper side of the digestion cylinder (201). The detection component (7) is located on the top surface of the sealing cylinder (202). Two dosing devices ( 6) The sealing cylinder (202) is located on both sides of the space above the sealing cylinder (202). The bottom end of the sealing cylinder (202) is open. The bottom surface of the sealing cylinder (202) is provided with a docking ring groove (203). The top end of the digestion cylinder (201) is slidably inserted into the docking ring groove (203). The top wall of the docking ring groove (203) is inclined with the outer edge higher than the inner edge. The top surface of the digestion cylinder (201) is inclined with the outer edge lower than the inner edge. The top surface of the digestion cylinder (201) is in contact with the top wall of the docking ring groove (203).

4. The micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 3, characterized in that, The weighing mechanism (3) includes a base ring (301), which is fixedly connected to the bottom surface of the inner cavity of the outer shell (101). A bearing plate (302) is slidably inserted inside the base ring (301). A pressure sensor (303) is fixedly connected to the bottom surface of the bearing plate (302). A weighing tube (304) is fixedly connected to the top surface of the bearing plate (302). An expansion cylinder (305) is fixedly connected to the top of the weighing tube (304). The top of the expansion cylinder (305) is open. Four weighing arms (306) are equally spaced on the side of the weighing tube (304).

5. A micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 4, characterized in that, The crushing mechanism (4) includes a support plate (401), which is slidably inserted into the weighing tube (304). Four L-shaped legs (402) are fixedly connected at equal intervals on the side of the support plate (401). The four L-shaped legs (402) correspond one-to-one with the four weighing arms (306). The other end of the L-shaped legs (402) passes through the corresponding weighing arm (306) and bends downward before being fixedly connected to the bottom surface of the inner cavity of the outer shell (101). Three electric telescopic rods (403) are fixedly connected at equal intervals along the circumferential direction on the top surface of the support plate (401). The top of the three electric telescopic rods (403) is fixedly connected to the same displacement platform (404). The displacement platform (404) is slidably inserted into the weighing tube (304). An embedding groove (40) is opened on the bottom surface of the displacement platform (404). 5) A central hole (406) is provided on the top surface of the displacement stage (404). The central hole (406) is connected to the mounting groove (405). A crushing motor (407) is installed inside the mounting groove (405). A bevel gear (408) is fixedly connected to the top surface of the output shaft of the crushing motor (407). The bottom surface of the digestion cylinder (201) is in contact with the top surface of the displacement stage (404). A rotating hole (409) is provided on the bottom surface of the digestion cylinder (201). A rotating shaft (410) is rotatably installed inside the rotating hole (409). A tapered toothed hole (411) is provided on the bottom surface of the rotating shaft (410). The bevel gear (408) is inserted into the tapered toothed hole (411) and meshes with each other. The top end of the rotating shaft (410) extends into the digestion cylinder (201) and a crushing blade (412) is fixedly installed thereon.

6. A micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 5, characterized in that, The calibration structure (5) includes a temporary storage plate (501), which is located between the control module (106) and the battery (107). The back of the temporary storage plate (501) is fixedly connected to the back of the inner cavity of the outer shell (101). A calibration hole (502) is provided on the top surface of the temporary storage plate (501). The digestion cylinder (201) and the displacement stage (404) can both pass through the calibration hole (502). Two calibration plates (503) are fixedly connected to the top surface of the temporary storage plate (501). The two calibration plates (503) are located on both sides of the calibration hole (502). The two sides of the calibration plates (503) that are close to each other are tangent to the inner wall of the calibration hole (502). A calibration platform (504) is fixedly connected between the two ends of the two calibration plates (503) that are away from the panel (103). The back of the calibration platform (504) is fixedly connected to the back of the inner cavity of the outer shell (101). An arc groove (505) is opened on the surface of the calibration platform (504) that is close to the calibration plate (503). The two sides of the two calibration plates (503) that are close to each other are tangent to the inner wall of the arc groove (505). The inner wall of the arc groove (505) slides in contact with the surface of the digestion cylinder (201).

7. A micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 6, characterized in that, The dosing device (6) includes a storage cylinder (601), which is fixedly connected to the top surface of the inner cavity of the outer shell (101). The top surface of the outer shell (101) has an insertion hole that communicates with the storage cylinder (601). The bottom end of the storage cylinder (601) is fixedly connected to a docking cap (602). The bottom end of the docking cap (602) is fixedly connected to a rigid tube (603). The other end of the rigid tube (603) is fixedly connected to the top of the side of the sealing cylinder (202). A plunger sampling pump (604) is installed on the rigid tube (603). A liquid storage cylinder (605) is inserted inside the storage cylinder (601). The digestion reagent is stored inside the liquid storage cylinder (605). The bottom end of the liquid storage cylinder (605) is provided with a docking nozzle, which is threadedly installed inside the docking cap (602). The top end of the liquid storage cylinder (605) is exposed outside the outer shell (101).

8. A micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 7, characterized in that, The detection component (7) includes a sliding hole (701), which is located in the middle of the top surface of the sealing cylinder (202). An internally threaded cylinder (702) is inserted into the sliding hole (701). A threaded rod (703) is installed inside the internally threaded cylinder (702) with a threaded fit. A drive motor (704) is fixedly connected to the top of the threaded rod (703). The top of the drive motor (704) is bolted to the top surface of the inner cavity of the outer shell (101). An extension cylinder (705) is fixedly connected to the bottom of the internally threaded cylinder (702). Two long boxes (706) are fixedly connected to the outer sides of the extension cylinder (705) and the internally threaded cylinder (702) in an aligned and symmetrical manner. The long boxes (706) are slidably inserted into the sliding hole (701). A space is formed between the surface of the internally threaded cylinder (702), the inner wall of the sliding hole (701), and the side of the long boxes (706). With an open opening, the inner wall of the extension tube (705) is provided with a wire hole (707), which is connected to the inner cavity of the long box (706). The center of the bottom surface of the extension tube (705) is provided with an installation hole (708), and a smart sensor (709) is installed inside the installation hole (708) with a threaded fit. Four protective strips (710) are fixedly connected to the bottom surface of the extension tube (705), and the bottom ends of the four protective strips (710) are fixedly connected to the same protective ring (711). The separation mechanism (8) is installed at the bottom of the protective ring (711). Both sides of the long box (706) are provided with shielding strips (712), which are fixedly connected to the inner wall of the sliding hole (701). A guide hole (713) is formed between the two shielding strips (712), and the long box (706) is slidably inserted into the guide hole (713).

9. A micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 8, characterized in that, The separation mechanism (8) includes a separation disc (801), which is slidably inserted into the sealing cylinder (202). A receiving groove (803) is provided on the bottom surface of the separation disc (801). A pressing disc (804) is installed inside the receiving groove (803) with a threaded fit. A clamping cavity is formed inside the receiving groove (803), and filter paper is installed inside the clamping cavity. Separation holes (802) are provided on both the separation disc (801) and the pressing disc (804). A through hole is provided in the middle of both the separation disc (801) and the pressing disc (804). An installation bolt (805) is inserted inside the through hole. The top of the installation bolt (805) is threaded and installed inside the protective ring (711).

10. A micro-open detection device for heavy metals in agricultural products based on intelligent sensors according to claim 9, characterized in that, The distributor (9) includes a distribution plate (901), which is fixedly connected to the inner wall of the sealing cylinder (202) and located above the separation plate (801). A distribution cavity is formed above the distribution plate (901), and a rigid tube (603) communicates with the distribution cavity. A conical groove (902) is provided on the top surface of the distribution plate (901), and a leakage hole (903) is provided at the bottom end of the conical groove (902). A distribution ring (904) is fixedly connected to the inner wall of the conical groove (902). The internal threaded cylinder (702) and the long box (706) can both pass through the leakage hole (903). The extension cylinder (705) is located on the upper side of the leakage hole (903). An annular slit is formed between the top surface of the distribution ring (904) and the top surface of the inner cavity of the sealing cylinder (202). A compensation hole (905) is provided at the bottom of the distribution ring (904).

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