Aflatoxin detector based on transparent channel double-sided photographing

Abstract

The utility model discloses an aflatoxin detector based on transparent channel double-sided photographing, and relates to the technical field of detection equipment. The detector comprises an outer shell and a detector body arranged in the outer shell, the detector body comprises a vibration feeder, a rolling assembly, a photographing assembly, a weighing and receiving assembly and a base frame, and the photographing assembly comprises a transparent channel located below an outlet of the rolling assembly and cameras located on the two sides of the transparent channel respectively. Light sources are further arranged on the two sides of the transparent channel, and the weighing material receiving assembly comprises a weighing material box which is located below the transparent channel and can pop up and a pressing plate used for pressing and driving the weighing material box to pop up. The aflatoxin fluorescence detection device has the beneficial effects that aflatoxin fluorescence is excited by a light source in a closed environment through a camera in the photographing assembly, fluorescence photographing is carried out, and double-sided photographing is carried out on a transparent channel, so that the detection precision is improved, and the requirement of on-site rapid screening is met.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to an aflatoxin detector based on double-sided photography of a transparent channel. Background Art

[0002] Aflatoxin, a type of fungal toxin produced primarily by Aspergillus flavus and Aspergillus parasiticus, is highly carcinogenic. With the expansion and complexity of the global food supply chain, aflatoxin contamination in food has become increasingly prominent, posing a serious threat to public health.

[0003] Currently, the main methods for aflatoxin detection include chromatography, mass spectrometry, and enzyme-linked immunosorbent assay (ELISA). Chromatography and mass spectrometry offer accurate results, high sensitivity, and good reproducibility, but they require specialized technicians, require lengthy analysis times, consume large amounts of organic reagents, and require expensive equipment, making them unsuitable for low-cost and rapid detection and analysis. ELISA, while offering advantages such as high sensitivity and rapidity, suffers from limitations such as a short reagent shelf life, poor antibody stability, and a high risk of false-positive results, limiting its further application. Therefore, grain-related companies face increasing demands for not only accuracy but also environmental compatibility, timeliness, and cost control of the detection method (or equipment). While the aforementioned aflatoxin detection methods generally meet accuracy requirements at grain procurement sites, they exhibit limitations in environmental compatibility, timeliness, and cost. However, existing detection equipment often suffers from limitations such as a single sampling method, low accuracy, and inefficient operation, making it inadequate for rapid on-site screening. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an aflatoxin detector based on double-sided photography of a transparent channel, which can improve detection accuracy and meet the needs of on-site rapid screening.

[0005] The purpose of the utility model is achieved through the following technical solutions: a aflatoxin detector based on double-sided photography of a transparent channel, comprising an outer shell and a detector body placed in the outer shell, the detector body comprising a vibrating feeder, a crushing assembly, a photographing assembly, a weighing and receiving assembly and a base frame, wherein the vibrating feeder and the crushing assembly are respectively installed on the base frame, the vibrating feeder vibrates the material to the inlet of the crushing assembly, the photographing assembly comprises a transparent channel located below the outlet of the crushing assembly and cameras located on both sides of the transparent channel, light sources for stimulating aflatoxin fluorescence in the material are also provided on both sides of the transparent channel, aflatoxin will produce fluorescence under the irradiation of long-wave ultraviolet rays (such as 315-400nm), the light source described in this application is a preferred ultraviolet light source, and other light sources that can excite aflatoxin fluorescence may also be applicable, the weighing and receiving assembly comprises a weighing box located below the transparent channel and capable of popping out, and a pressing plate for pressing to drive the weighing box to pop out.

[0006] Preferably, a crushing channel is provided on the base frame. The closed crushing channel can prevent the crushed particles from flying. The crushing assembly includes a first roller, a second roller, and a power component for driving the first roller and the second roller to rotate synchronously in opposite directions (the first roller and the second roller rotate in opposite directions). The first roller and the second roller are arranged in parallel in the crushing channel. After the material is crushed between the first roller and the second roller, it falls into the transparent channel through the crushing channel. The crushing assembly also includes a first rotating shaft for driving the first roller to rotate, a second rotating shaft for driving the second roller to rotate, and an adjustment component for adjusting the distance between the first rotating shaft and the second rotating shaft. The crushing channel is surrounded by a first mounting plate arranged on the base frame, a cover body located above the first mounting plate, and the side wall of the base frame covered by the cover body. A material dropout port is provided on the first mounting plate. It should be noted that the crushing channel can also be formed by a channel in the cover body alone. The crushing channel is funnel-shaped with a larger top and a smaller bottom. The base frame is also provided with a second mounting plate, a slide groove is provided on the second mounting plate, a slideway for the sliding of the second rotating shaft is provided on the base frame, and the adjustment component is composed of a first base fixedly mounted on the second mounting plate, a second base slidably mounted on the slide groove, and a transmission device for driving the second base to slide, wherein the transmission device is composed of a first servo motor, a first transmission gear and a second transmission gear, the first servo motor is mounted on the base frame, the first transmission gear is mounted on the output shaft of the first servo motor, the second transmission gear and the first transmission gear are meshed with each other for transmission, a screw is provided on the second transmission gear, a screw sleeve matching the screw is provided on the second base, the first rotating shaft is rotatably mounted in the first base, the second rotating shaft is rotatably mounted in the second base, and the position of the second base is adjusted by the first servo motor. It can be seen that the spacing between the first roller and the second roller in this application is adjustable, which can be applied to the detection of different types of grain particles. The transmission device in the rolling assembly uses gear rotation to make the transmission smoother. The screw and sleeve combination between the second transmission gear and the second base can convert the rotational motion of the gear into the translational motion of the second base. The translation distance of the second base is controlled by controlling the number of rotations of the first servo motor.

[0007] Because the crushing is performed using a first roller and a second roller, the present application employs a method in which the first and second rollers rotate in opposite directions. The power component includes a second servo motor, a first transmission wheel mounted on a first rotating shaft, and a second transmission wheel mounted on a second rotating shaft. A main transmission wheel is provided on the output shaft of the second servo motor. The first transmission wheel, the second transmission wheel, and the main transmission wheel are driven by a transmission belt, wherein the first transmission wheel and the second transmission wheel rotate in opposite directions. The power component also includes a tensioning pulley arranged in the belt drive, and the tension of the transmission belt is maintained by adjusting the tensioning pulley.

[0008] The base frame is also provided with a third mounting plate. The transparent channel is defined by a mounting bracket and two transparent glass plates arranged parallel to the mounting bracket, which are secured to the third mounting plate. The camera and light source are both mounted on the base frame using adjustable brackets. Preferably, the light source is positioned above the camera, covering the entire transparent channel, and the camera's field of view also encompasses the entire channel. The crushed grains fall into the channel formed between the two transparent glass plates. Because the detector body is housed within the outer shell, the channel is located in a relatively enclosed and dark space. Under the stimulation of the light source, photos of grains containing aflatoxin appear very bright (a fluorescence effect). Therefore, in this solution, photography is employed. An industrial camera is used, typically with a frame rate of 10-30 frames per second (fps). High-speed cameras can reach hundreds or even thousands of fps, while ultra-high-speed industrial cameras support over 1,000 fps. Since the crushed grain particles fall freely at a relatively slow velocity, industrial cameras are perfectly suited for this solution. Considering that crushed grain particles may overlap and form blocks, affecting the photographic effect, this solution uses a specific light source to illuminate aflatoxin in the material and excite fluorescence. The fluorescence in the transparent channel is photographed by the camera in the photographic component. At the same time, double-sided photography is performed on both sides of the transparent channel, which can produce more realistic photos and further improve detection accuracy.

[0009] The weighing material receiving assembly also includes an execution device located between the pressing plate and the weighing material box, the execution device also includes a bottom plate installed on the base frame, a slide plate slidably installed on the bottom plate and a magnetic block installed on the side wall of the base frame, the pressing plate is installed at one end of the slide plate, and a pressing rebounder is provided at the other end of the slide plate, and a magnetic head matching the magnetic block is provided on the movable end of the pressing rebounder, a support plate is also provided on the slide plate, the weighing material box is placed on the support plate, a photoelectric sensor for detecting whether the weighing material box is in place is provided on the base frame, and a weighing sensor for detecting the weight of the material is also provided between the support plate and the slide plate. The photoelectric sensor uses a miniature diffuse reflection photoelectric sensor. After detection, the grain particles fall into the weighing box. The weighing sensor can feed back the weight of the grain particles to the processor in real time and display it on the display. When all the grain particles have fallen, press the push plate, press the rebounder to separate the magnetic head and the magnetic block, then pull the push plate to move the slide and pull the weighing box out of the outer shell. Remove the weighing box and pour out the grain particles. Then place the weighing box on the slide and press the push plate. The photoelectric sensor can detect whether the weighing box is under the transparent channel. If the weighing box is not under the transparent channel, it means that the push plate has been pulled out and the device cannot be started for detection. If the weighing box is under the transparent channel, it means that the push plate has been pressed in and the device can be started for detection.

[0010] Since there are many parts in this solution, the parts can be directly installed on the base frame or installed on the base frame through the bracket, which will not be explained here one by one.

[0011] The outer shell is provided with a display screen, a processor for controlling the entire machine, a material taking port for pressing a plate to pass through, a button switch for starting the equipment, and a feed hopper connected to the feed port of the vibrating feeder. In this solution, the vibration motor in the vibrating feeder, the first servo motor and the second servo motor in the crushing assembly, the camera in the photographing assembly, the photoelectric sensor in the weighing and receiving assembly, and the weighing sensor communicate with the processor. When the equipment is started, the vibrating feeder, the second servo motor, the photographing assembly, and the weighing and receiving assembly start working to complete normal detection operations. If the spacing between the first roller and the second roller needs to be adjusted, the switch for the first servo motor can be pressed to make the adjustment. At this time, the vibrating feeder, the second servo motor, the photographing assembly, and the weighing and receiving assembly stop working.

[0012] The beneficial effects of the present invention are as follows: (1) after the grain is crushed by the crushing assembly, the aflatoxin fluorescence is stimulated by the camera in the photographing assembly using the light source in a closed environment, and the fluorescence is photographed, which can more accurately determine whether the grain contains aflatoxin, improve the detection accuracy, and meet the needs of on-site rapid screening; (2) double-sided photography through the transparent channel avoids the situation where grain particles overlap and form blocks that affect the photography effect, and can take more realistic photos, further improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structural blasting of the present utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the utility model after assembly;

[0015] Figure 3 This is a schematic diagram of the structure of one side of the main body of the detector of the utility model;

[0016] Figure 4 This is a schematic diagram of the explosion structure of the main body of the detector of the utility model;

[0017] Figure 5 This is a structural diagram of the other side of the main body of the detector of the utility model;

[0018] Figure 6 This is a front view of the rolling assembly of the present invention (the base frame is not shown);

[0019] Figure 7 This is a schematic diagram of the back of the rolling assembly of the utility model (the base frame is not shown);

[0020] Figure 8 This is a schematic diagram of the blasting structure of the photographic assembly of the utility model;

[0021] Figure 9 This is a side structural diagram of the weighing and receiving assembly of the utility model (the base frame is not shown);

[0022] Figure 10 This is a schematic top view of the structure of the weighing and receiving assembly of the utility model (the base frame is not shown);

[0023] Figure 11 It is a structural schematic diagram of the outer shell of the utility model.

[0024] In the figure, 1- outer shell, 2- vibration feeder, 3- rolling assembly, 4- camera assembly, 5- weighing and receiving assembly, 6- base frame, 101- display screen, 102- feeding port, 103- button switch, 104- feeding hopper, 105- network interface, 106- start switch, 107- adjustment button, 108- USB interface, 301- first roller, 302- second roller, 303- second servo motor, 304- first rotating shaft, 305- second rotating shaft, 306- first base, 307- second base, 308- first servo motor, 309- first transmission gear, 310- second transmission gear, 311- screw, 312- screw sleeve, 313- first transmission wheel, 314- second transmission wheel, 315- main transmission Driving wheel, 316- transmission belt, 317- tensioning wheel, 318- buffer, 319- fixed plate, 401- transparent channel, 402- camera, 403- light source, 404- mounting bracket, 405- transparent glass plate, 501- weighing box, 502- pressing plate, 503- bottom plate, 504- slide plate, 505- magnetic block, 506- magnetic head, 507- support plate, 508- photoelectric sensor, 509- weighing sensor, 510- press rebounder, 601- rolling channel, 602- first mounting plate, 603- cover, 604- blanking port, 605- second mounting plate, 606- slide chute, 607- third mounting plate, 608- board, 609- distribution box, 610- motor controller, 611- slideway. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings and embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] like Figures 1-4As shown, a kind of aflatoxin detector based on transparent channel double-side photographing, including shell body 1 and the detector main body placed in shell body 1, the detector main body includes vibration feeder 2, roller assembly 3, photographing assembly 4, weighing material receiving assembly 5 and base frame 6, wherein vibration feeder 2 and roller assembly 3 are respectively installed on base frame 6, vibration feeder 2 is vibrated to the import of roller assembly 3 with material, the photographing assembly 4 includes transparent channel 401 below the outlet of roller assembly 3 and camera 402 respectively on the two sides of the transparent channel 401, the two sides of the transparent channel 401 are also provided with light source 403 for exciting aflatoxin fluorescence in material, the weighing material receiving assembly 5 includes the weighing material box 501 below transparent channel 401 and can eject, the press plate 502 for pressing and driving weighing material box 501 eject.

[0027] The base frame 6 is provided with roller channel 601, and the roller assembly 3 includes first roller 301, second roller 302 and power component for driving the first roller 301 and second roller 302 to rotate synchronously, the first roller 301 and the second roller 302 are arranged in parallel in the roller channel 601, and the material is crushed between the first roller 301 and the second roller 302 and then falls into the transparent channel 401 through the roller channel 601. Figure 5 As shown, the base frame 6 is also provided with board card 608, one side of base frame 6 is used to install roller channel 601 and transparent channel 401, and the other side of base frame 6 is used to install board card 608 and second servo motor 303, board card model: 2014-12-750-V1.0, three motor controllers 610 (two CL42D type controllers and one DM422S1 type controller) are installed on board card 608, respectively used to control vibration motor in vibration feeder 2, first servo motor 308 in roller assembly 3 and second servo motor 303, motor controllers are all installed on board card 608 and communicate with processor, to realize the control of processor. Power distribution box 609 is also provided on board card 608, for power supply to corresponding electrical components of the whole machine.

[0028] As shown, Figure 6-Figure 7As shown, the rolling assembly 3 also includes a first rotating shaft 304 for rotating the first roller 301, a second rotating shaft 305 for rotating the second roller 302, and an adjustment component for adjusting the distance between the first rotating shaft 304 and the second rotating shaft 305. The rolling channel 601 is formed by a first mounting plate 602 disposed on the base frame 6, a cover 603 located above the first mounting plate 602, and the sidewall of the base frame 6 covered by the cover 603. The first mounting plate 602 is provided with a dropout 604. The rolling channel 601 is funnel-shaped, with a larger top and a smaller bottom. A second mounting plate 605 is also provided on the base frame 6, and a slide groove 606 is provided on the second mounting plate 605. Correspondingly, a slideway 611 for the sliding of the second rotating shaft 305 is provided on the base frame 6. The adjusting component is composed of a first base 306 fixedly mounted on the second mounting plate 605, a second base 307 slidably mounted on the slide groove 606, and a transmission device for driving the second base 307 to slide. A buffer member 318 is also provided between the first base 306 and the second base 307. The buffer member 318 adopts a spring or an elastic pad to avoid collision between the second base 307 and the first base 306. The transmission device consists of a first servo motor 308, a first transmission gear 309 and a second transmission gear 310. The first servo motor 308 is installed on the base frame 6, the first transmission gear 309 is installed on the output shaft of the first servo motor 308, the second transmission gear 310 and the first transmission gear 309 are engaged with each other for transmission, the second transmission gear 310 is provided with a screw 311, and the second base 307 is provided with a screw sleeve 312 matching the screw 311. The first rotating shaft 304 is rotatably installed in the first base 306, and the second rotating shaft 305 is rotatably installed in the second base 307. The position of the second base 307 is adjusted by the first servo motor 308. The power component includes a second servo motor 303, a first transmission wheel 313 mounted on a first rotating shaft 304, and a second transmission wheel 314 mounted on a second rotating shaft 305. A main transmission wheel 315 is provided on the output shaft of the second servo motor 303. The first transmission wheel 313, the second transmission wheel 314, and the main transmission wheel 315 are driven by a transmission belt 316. The first transmission wheel 313 and the second transmission wheel 314 rotate in opposite directions. The second servo motor 303 is mounted on the base frame 6 via a fixed plate 319. The power component also includes a tensioning wheel 317 arranged in the belt drive. When the grain material from the vibrating feeder 2 falls into the crushing assembly 3, the first roller 301 and the second roller 302 are reversed by the transmission belt 316 and have opposite rotation directions, thereby achieving the degree to which the grain material is crushed into powder. The crushed grain material particles fall into the next process along the crushing channel 601.

[0029] like Figure 8As shown, the base frame 6 is further provided with a third mounting plate 607. The transparent channel 401 is formed by a mounting bracket 404 and two transparent glass plates 405 arranged parallel to the mounting bracket 404. It should be noted that the transparent glass plates 405 can also be replaced with other transparent materials (such as acrylic transparent plates, PET transparent plates, UV transparent plates, PVC transparent plates, etc.). The mounting bracket 404 is fixed to the third mounting plate 607, and the distance between the two transparent glass plates 405 is 5-8 mm. After the grain in the crushing component 3 is crushed, it will fall into the transparent channel 401 along the crushing channel 601. At this time, there is only the light source 403 in the dark and closed environment. If the crushed grain contains aflatoxin, the light source 403 will excite the aflatoxin to produce fluorescence. The crushed grain particles passing through the middle of the two transparent glass plates 405 will be immediately captured by the cameras 402 on both sides and transmitted to the processor. The grain particles containing aflatoxin will be excited to fluoresce under ultraviolet light and appear highlighted. The transmitted photos can be calculated by the processor to calculate the size and brightness of the aflatoxin fluorescence spots, thereby determining the aflatoxin content in the material and performing quantitative analysis.

[0030] like Figure 9-10 As shown, the weighing material receiving assembly 5 also includes an execution device located between the pressing plate 502 and the weighing material box 501, and the execution device also includes a base plate 503 installed on the base frame 6, a slide plate 504 slidably installed on the base plate 503, and a magnetic block 505 installed on the side wall of the base frame 6, the pressing plate 502 is installed at one end of the slide plate 504, and the other end of the slide plate 504 is provided with a pressing rebounder 510, and a magnetic head 506 matching the magnetic block 505 is provided on the movable end of the pressing rebounder 510, and a support plate 507 is also provided on the slide plate 504, and the weighing material box 501 is placed on the support plate 507, and a photoelectric sensor 508 for detecting whether the weighing material box 501 is in place is provided on the base frame 6, and the photoelectric sensor 508 adopts a diffuse reflection photoelectric switch with model E3Z-D61, and a weighing sensor 509 for detecting the weight of the material is also provided between the support plate 507 and the slide plate 504. The grain particles that have been photographed will continue to fall freely along the glass plate and fall into the weighing material box 501 in the weighing assembly. From then on, the grain inspection is completed. Each mechanism cooperates with each other and then works separately to complete the aflatoxin inspection work together.

[0031] like Figure 11As shown, the outer shell 1 is provided with a display screen 101, a processor for controlling the entire machine, a material taking port 102 for the press plate 502 to pass through, a button switch 103 for starting the device, and a feed hopper 104 connected to the feed port of the vibrating feeder 2. In addition, the outer shell 1 is also provided with a network interface 105 for realizing communication between the processor and the external network, a start switch 106 for starting the detection process, an adjustment button 107 for adjusting the roller spacing, a USB interface 108 for connecting external devices, and a plug for powering the entire machine. There are two USB interfaces 108, and the external devices include a mouse and keyboard for input. Since this type of setting is a commonly used device, they are not listed here one by one. The processor uses i7-9700 with STM32F407 chip, and the graphics card of the display screen 101 uses 3060. It should be noted that there are two adjustment buttons 107, namely, increase and decrease buttons. The first servo motor 308 used to adjust the roller spacing can pre-set the adjustment threshold, that is, after increasing to the maximum value or decreasing to the minimum value, the first servo motor 308 no longer rotates, and each time the adjustment button is pressed, the second base 307 is adjusted according to the preset adjustment distance, such as 2-3mm each time.

[0032] The main operations of the equipment in this scheme are as follows: (1) Turn on the power of the equipment, press the button switch 103, open the detection software on the display screen 101 interface, and pour the grain material to be detected into the feed port of the vibrating feeder 2 through the feed hopper 104; (2) Click the start switch, at this time the vibrating feeder 2 starts to work, vibrating the grain material into the rolling component 3, and the first roller 301 and the second roller 302 in the rolling component 3 can roll the grain material into 5 to 16 mesh; (3) The broken grain after rolling falls into the transparent channel 401 in the photographing component 4 along the rolling channel 601, and the transparent channel Two light sources 403 are hung above both sides of 401. When damaged grains pass through the transparent channel 401, the camera 402 starts taking pictures, and the pictures are transmitted to the processor. Under the action of the light source 403, the grains with aflatoxin will be displayed very brightly; (4) The damaged grains after detection will continue to fall freely and fall into the weighing material box 501 in the weighing material receiving component 5; (5) The grain materials in the feed hopper 104 are thoroughly detected and all fall into the weighing material box 501. At this time, the detection is completed, press and pull out the press plate 502, and the weighing material box 501 will be ejected and pulled out, and the detected object can be taken out.

[0033] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A transparent channel double-sided photography-based aflatoxin detector, comprising an outer shell (1) and a detector body placed in the outer shell (1), characterized in that: The detector body includes a vibrating feeder (2), a rolling assembly (3), a photographing assembly (4), a weighing and receiving assembly (5) and a base frame (6), wherein the vibrating feeder (2) and the rolling assembly (3) are respectively mounted on the base frame (6), the vibrating feeder (2) vibrates the material to the inlet of the rolling assembly (3), the photographing assembly (4) includes a transparent channel (401) located below the outlet of the rolling assembly (3) and cameras (402) located on both sides of the transparent channel (401), and light sources (403) for stimulating aflatoxin fluorescence in the material are also provided on both sides of the transparent channel (401), and the weighing and receiving assembly (5) includes a weighing material box (501) located below the transparent channel (401) and capable of popping out, and a pressing plate (502) for pressing and driving the weighing material box (501) to pop out.

2. The aflatoxin detector based on double-sided photography of a transparent channel according to claim 1, characterized in that: A rolling channel (601) is provided on the base frame (6), and the rolling assembly (3) includes a first roller (301), a second roller (302), and a power component for driving the first roller (301) and the second roller (302) to rotate synchronously in opposite directions. The first roller (301) and the second roller (302) are arranged in parallel in the rolling channel (601). After the material is crushed between the first roller (301) and the second roller (302), it falls into the transparent channel (401) through the rolling channel (601); The rolling assembly (3) further comprises a first rotating shaft (304) for driving the first roller (301) to rotate, a second rotating shaft (305) for driving the second roller (302) to rotate, and an adjusting component for adjusting the distance between the first rotating shaft (304) and the second rotating shaft (305).

3. The aflatoxin detector based on double-sided photography of a transparent channel according to claim 2, characterized in that: The rolling channel (601) is surrounded by a first mounting plate (602) arranged on the base frame (6), a cover body (603) located above the first mounting plate (602), and a side wall of the base frame (6) covered by the cover body (603), and a blanking port (604) is provided on the first mounting plate (602).

4. The aflatoxin detector based on double-sided photography of a transparent channel according to any one of claims 2 or 3, characterized in that: The rolling channel (601) is funnel-shaped with a larger top and a smaller bottom.

5. The aflatoxin detector based on double-sided photography of a transparent channel according to claim 2, characterized in that: The base frame (6) is further provided with a second mounting plate (605), the second mounting plate (605) is provided with a slide groove (606), the base frame (6) is provided with a slideway (611) for the second rotating shaft (305) to slide, the adjusting component is composed of a first base (306) fixedly mounted on the second mounting plate (605), a second base (307) slidably mounted on the slide groove (606), and a transmission device for driving the second base (307) to slide, wherein the transmission device is composed of a first servo motor (308), a first transmission gear (309) and a second transmission gear (310), the first servo motor (308) is mounted on the base frame (6), the first transmission gear (309) is mounted on the output shaft of the first servo motor (308), the second transmission gear (310) and the first transmission gear (309) are meshed with each other for transmission, the second transmission gear (310) is provided with a screw (311), the second base (307) is provided with a screw sleeve (312) matching the screw (311), the first rotating shaft (304) is rotatably mounted in the first base (306), the second rotating shaft (305) is rotatably mounted in the second base (307), and the position of the second base (307) is adjusted by the first servo motor (308).

6. The aflatoxin detector based on double-sided photography of a transparent channel according to claim 2, characterized in that: The power component comprises a second servo motor (303), a first transmission wheel (313) mounted on a first rotating shaft (304), and a second transmission wheel (314) mounted on a second rotating shaft (305); a main transmission wheel (315) is provided on the output shaft of the second servo motor (303); the first transmission wheel (313), the second transmission wheel (314), and the main transmission wheel (315) are driven by a transmission belt (316); the first transmission wheel (313) and the second transmission wheel (314) rotate in opposite directions.

7. The aflatoxin detector based on double-sided photography of a transparent channel according to claim 6, characterized in that: The power component further comprises a tensioning wheel (317) arranged in the belt drive.

8. The aflatoxin detector based on double-sided photography of a transparent channel according to claim 1, characterized in that: A third mounting plate (607) is also provided on the base frame (6), and the transparent channel (401) is surrounded by a mounting bracket (404) and two transparent glass plates (405) arranged parallel to the mounting bracket (404), and the mounting bracket (404) is fixed on the third mounting plate (607).

9. The aflatoxin detector based on double-sided photography of a transparent channel according to claim 1, characterized in that: The weighing material receiving assembly (5) further includes an execution device located between the pressing plate (502) and the weighing material box (501), the execution device further includes a bottom plate (503) mounted on the base frame (6), a slide plate (504) slidably mounted on the bottom plate (503), and a magnetic block (505) mounted on the side wall of the base frame (6), the pressing plate (502) is mounted on one end of the slide plate (504), and the other end of the slide plate (504) is provided with a pressing rebounder (510), and the pressing rebounder (510) is provided on the other end of the slide plate (504). A magnetic head (506) matching the magnetic block (505) is provided on the movable end of the ejector (510), a support plate (507) is further provided on the slide plate (504), the weighing material box (501) is placed on the support plate (507), a photoelectric sensor (508) for detecting whether the weighing material box (501) is in place is provided on the base frame (6), and a weighing sensor (509) for detecting the weight of the material is further provided between the support plate (507) and the slide plate (504).

10. The aflatoxin detector based on double-sided photography of a transparent channel according to claim 1, characterized in that: The outer shell (1) is provided with a display screen (101), a processor for controlling the entire machine, a material taking port (102) for the pressing plate (502) to pass through, a button switch (103) for starting the device, and a feeding hopper (104) connected to the feeding port of the vibrating feeder (2).

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