A whiteness tester for rice detection

Abstract

The application belongs to the technical field of rice detection, and particularly relates to a whiteness tester for rice detection, which comprises a detection table, a supporting frame, a detection electric push rod, a lifting plate, a light shield and an image sensor array. The supporting frame is fixedly connected to the upper side wall of the detection table. The detection electric push rod is fixedly connected to the upper side wall of the supporting frame. The moving end of the detection electric push rod extending out of the supporting frame is connected with the lifting plate. The image sensor array is fixedly connected to the lower side wall of the lifting plate. The light shield is arranged on the outer wall of the lifting plate. The whiteness tester can directly connect to the discharging port of a rice production line to automatically sample, and can single-grain separate the rice. The whiteness of the rice can be detected from multiple sides through automatic overturning of the rice by the rubber wheel, so that the authenticity of the whiteness detection data of the rice is ensured.

Description

Technical Field

[0001] This invention belongs to the field of rice testing technology, and in particular relates to a whiteness measuring instrument for rice testing. Background Technology

[0002] After rice is milled and polished, it becomes finished rice. Whiteness is the core quantitative indicator for judging the precision of rice processing and classifying the quality grade of rice. The rice production line needs to adjust the milling pressure in real time according to the whiteness value to avoid problems such as insufficient milling leaving bran and excessive processing leading to increased loss of broken rice. At the same time, the storage and market supervision links need to rely on whiteness data to distinguish between new and old rice and screen out inferior polished rice. Therefore, the entire process of rice production and quality inspection requires the use of a special whiteness measuring instrument to complete quantitative testing.

[0003] Existing rice whiteness measuring instruments can only measure whiteness by laying rice flat and collecting reflected light signals from the top surface. They cannot rotate the rice grains to simultaneously measure the back, back groove, and germ side areas. Since most of the bran residue and yellow spots on the rice grains are distributed on the bottom and in the grooves, single-sided testing can only obtain local test data. The calculated whiteness value deviates significantly from the true color of the rice grains, leading to misjudgments of rice processing accuracy. This results in imbalances in the milling parameters of the production line, resulting in a large quantity of substandard rice.

[0004] To address this issue, a whiteness measuring instrument for rice testing is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a whiteness measuring instrument for rice detection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a whiteness measuring instrument for rice detection, comprising a detection platform, a support frame, a detection electric push rod, a lifting plate, a light shield, and an image sensor array. The support frame is fixedly connected to the upper side wall of the detection platform, the detection electric push rod is fixedly connected to the upper side wall of the support frame, the lifting plate and the moving end of the detection electric push rod extending from the support frame are connected, the image sensor array is fixedly connected to the lower side wall of the lifting plate, and the light shield is disposed on the outer wall of the lifting plate. The instrument also includes:

[0007] The sampling component is located on the upper side wall of the detection station and automatically extracts an appropriate amount of the produced rice.

[0008] A filter assembly, located inside the sampling assembly, can filter out impurities mixed in with the rice;

[0009] The placement component is fixedly installed on the upper side wall of the detection platform, allowing rice to be placed separately;

[0010] A drive component, located inside the placement component, enables the rice to rotate.

[0011] Preferably, the sampling assembly includes a drive motor, a lead screw linear module, a square tube, a collection cover, and a discharge pipe. The drive motor is fixedly connected to the upper side wall of the detection platform. The fixed part of the lead screw linear module is fixedly connected to the output end of the drive motor. One end of the square tube is a closed structure, and the other end is an open structure. The square tube is fixedly connected to the moving end of the lead screw linear module. The collection cover is fixedly connected to the upper side wall of the square tube, and the discharge pipe is fixedly connected to the lower side wall of the square tube.

[0012] Preferably, the filter assembly includes a rotary motor, a filter cylinder, a baffle, a collection box, an air pump, a mesh plate, and a vibration motor. The rotary motor is connected to the side wall of the square cylinder, and the filter cylinder is fixedly connected to the rotary motor through the output end of the square cylinder. The surface of the filter cylinder has multiple receiving slots. The inner wall of the square cylinder is connected to two guide plates. The baffle is fixedly connected to the inner wall of the square cylinder and contacts the end of the filter cylinder away from the rotary motor. The collection box is connected to the end of the square cylinder away from the rotary motor. The air pump is connected to the collection box. The mesh plate is tilted and fixed to the inner wall of the collection box. The vibration motor is connected to the side wall of the mesh plate.

[0013] Preferably, the placement assembly includes a placement box, a sealing frame, a negative pressure box, a negative pressure pump, multiple support pipes, and multiple placement racks. The placement box is fixedly connected to the upper side wall of the testing platform, the sealing frame is fixedly connected to the inner wall of the placement box, the negative pressure box is fixedly connected to the inner wall of the placement box, the suction end of the negative pressure pump is connected to the negative pressure box, the multiple support pipes are evenly distributed on the upper side wall of the negative pressure box and are connected to the negative pressure box, the multiple placement racks are respectively connected to the multiple support pipes, and a common connecting platform is fixedly connected between two adjacent rows of placement racks.

[0014] Preferably, the drive assembly includes two fixed plates, two small electric push rods, a lifting frame, multiple rotating rods, multiple rubber wheels, and a reduction motor. The two fixed plates are respectively fixedly connected to the left and right sides of the negative pressure box. The two small electric push rods are respectively fixedly connected to the upper side walls of the two fixed plates. The lifting frame is fixedly connected to the moving ends of the two small electric push rods. The multiple rotating rods are rotatably connected to the inner wall of the lifting frame. The multiple rubber wheels are respectively fixedly connected to the rod walls of the multiple rotating rods. The reduction motor is fixedly connected to the side wall of the lifting frame. The output end of the reduction motor is connected to the multiple rotating rods through a belt drive mechanism. The side wall of the placement frame has openings that are compatible with the rubber wheels.

[0015] Preferably, a recycling hood is fixedly connected to the rear side wall of the discharge pipe, a recycling pipe is fixedly connected between the recycling hood and the square cylinder, a first control valve is provided inside the recycling pipe, a sealing plate is fixedly connected to the inner wall of the square cylinder, a short pipe is inserted into the side wall of the sealing plate, and a second control valve is provided inside the short pipe.

[0016] Preferably, a rubber scraper is fixedly connected to the rear side wall of the recycling hood, a recycling bin is fixedly connected to the upper side wall of the detection platform, and a guide cover located above the recycling bin is connected to the side wall of the placement box.

[0017] Preferably, a guide seat is fixedly connected to the side wall of the collection box, an installation cavity is opened in the side wall of the guide seat, and a sealing electric push rod is fixedly connected to the side wall of the installation cavity. A sealing plate is fixedly connected to the moving end of the sealing electric push rod. A discharge port is opened in the side wall of the collection box, and a baffle located outside the discharge port is hinged to the side wall of the collection box.

[0018] Compared with existing technologies, the advantages of a whiteness meter for rice testing are:

[0019] 1. This invention, through the cooperation of a drive motor, a lead screw linear module, a placement component, and a drive component, eliminates the need for manual sampling, sorting, flipping, and picking up of rice. It can directly connect to the discharge port of a rice production line for automatic sampling and can also perform single-grain separation of rice. At the same time, the automatic flipping of rice grains by rubber wheels can perform multi-faceted whiteness detection of rice, thereby ensuring the authenticity of the whiteness detection data of rice.

[0020] 2. The present invention, through the filter component, can use airflow to separate impurities such as bran powder and dust on the surface of rice during the process of uniformly discharging rice using a filter cylinder, thereby avoiding the impact of impurities on the accuracy of test data during the whiteness test of rice.

[0021] 3. This invention can separate rice from impurities such as bran powder and dust, which reduces rice raw material loss and improves raw material utilization. At the same time, storing impurities and rice separately can prevent impurities from secondary contaminating rice samples during the cleaning process, improve the repeatability of test data, and facilitate manual retesting. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a whiteness measuring instrument for rice detection provided by the present invention;

[0023] Figure 2 This is a schematic diagram showing the position of the image sensor array in this invention;

[0024] Figure 3 This is a schematic diagram of the sampling component in this invention;

[0025] Figure 4 This is a schematic diagram of the structure of the filter component in this invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the collection box in this invention;

[0027] Figure 6 This is a schematic diagram of the structure of the filter cylinder and the baffle in this invention;

[0028] Figure 7 This is a schematic diagram of the structure in which the components are placed in this invention;

[0029] Figure 8 This is a schematic diagram showing the location of the negative pressure box in this invention;

[0030] Figure 9 This is a schematic diagram of the driving component in this invention;

[0031] Figure 10 yes Figure 9 An enlarged schematic diagram of part A in the middle;

[0032] Figure 11 This is a schematic diagram illustrating the arrangement of the placement frame and the two rubber wheels in this invention.

[0033] In the diagram: 1. Detection table; 2. Support frame; 3. Detection electric push rod; 4. Lifting plate; 5. Light shield; 6. Image sensor array; 7. Sampling assembly; 71. Drive motor; 72. Lead screw linear module; 8. Square cylinder; 9. Collection cover; 10. Discharge pipe; 11. Filter assembly; 111. Rotary motor; 112. Filter screen cylinder; 12. Baffle; 13. Collection box; 14. Air pump; 15. Mesh plate; 16. Vibration motor; 17. Placement assembly; 171. Placement box; 172. Sealing frame; 18. Negative pressure box; 19. Negative pressure pump. 20 Support tube, 21 Placement rack, 22 Drive assembly, 221 Fixing plate, 222 Small electric push rod, 23 Lifting frame, 24 Rotating rod, 25 Rubber wheel, 26 Gear motor, 27 Opening, 28 Recycling cover, 29 Recycling pipe, 30 First control valve, 31 Sealing plate, 32 Short pipe, 33 Second control valve, 34 Rubber scraper, 35 Recycling box, 36 Guide cover, 37 Guide seat, 38 Mounting cavity, 39 Sealing electric push rod, 40 Sealing plate, 41 Baffle, 42 Guide plate. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] like Figure 1-3As shown, a whiteness measuring instrument for rice detection includes a detection platform 1, a support frame 2, a detection electric push rod 3, a lifting plate 4, a light shield 5, and an image sensor array 6. The support frame 2 is fixedly connected to the upper side wall of the detection platform 1, the detection electric push rod 3 is fixedly connected to the upper side wall of the support frame 2, the lifting plate 4 and the detection electric push rod 3 are connected to the movable end extending from the support frame 2, the image sensor array 6 is fixedly connected to the lower side wall of the lifting plate 4, and the light shield 5 is disposed on the outer wall of the lifting plate 4. The instrument also includes a sampling assembly 7 disposed on the upper side wall of the detection platform 1. The sampling component 7 automatically extracts an appropriate amount of rice produced. It includes a drive motor 71, a lead screw linear module 72, a square cylinder 8, a collection cover 9, and a discharge pipe 10. The drive motor 71 is fixedly connected to the upper side wall of the detection platform 1. The fixed part of the lead screw linear module 72 is fixedly connected to the output end of the drive motor 71. One end of the square cylinder 8 is a closed structure, and the other end is an open structure. The square cylinder 8 is fixedly connected to the moving end of the lead screw linear module 72. The collection cover 9 is fixedly connected to the upper side wall of the square cylinder 8, and the discharge pipe 10 is fixedly connected to the lower side wall of the square cylinder 8.

[0036] During operation, the external controller starts the drive motor 71, which drives the lead screw linear module 72 and the square cylinder 8 to rotate as a whole, moving the collection cover 9 directly below the discharge port of the rice production line. The rice produced by the production line falls directly into the collection cover 9, and automatic sampling is completed by the weight of the materials on the production line, without the need for manual intervention. The lead screw linear module 72 can drive the square cylinder 8 to move back and forth, adjust the discharge position of the discharge pipe 10, and accurately align it with the feeding area of ​​the placement component 17, ensuring that the rice is transported to the testing station in an orderly manner, realizing online automatic sampling of the production line, with stable sampling volume and no human contamination of the samples.

[0037] Reference Figures 3-6 As shown, in this embodiment, the device further includes a filter assembly 11, which is disposed inside the sampling assembly 7 and can filter impurities mixed in with rice. The filter assembly 11 includes a rotary motor 111, a filter cylinder 112, a baffle 12, a collection box 13, a vacuum pump 14, a mesh plate 15, and a vibration motor 16. The rotary motor 111 is connected to the side wall of the square cylinder 8. The filter cylinder 112 and the rotary motor 111 are fixedly connected through the output end of the square cylinder 8. The surface of the filter cylinder 112 is provided with multiple receiving slots. The inner wall of the square cylinder 8 is connected to two guide plates 42. The baffle 12 is fixedly connected to the inner wall of the square cylinder 8 and contacts the end of the filter cylinder 112 away from the rotary motor 111. The collection box 13 is connected to the end of the square cylinder 8 away from the rotary motor 111. The vacuum pump 14 is connected to the collection box 13. The mesh plate 15 is tilted and fixed to the inner wall of the collection box 13. The vibration motor 16 is connected to the side wall of the mesh plate 15.

[0038] During operation, rice falls from the collection hood 9 into the square cylinder 8 and then onto the surface of the filter cylinder 112. The controller activates the air pump 14 to draw air from the inside of the collection box 13, creating negative pressure. External airflow flows along the collection hood 9, square cylinder 8, and short pipe 32 towards the collection box 13. As the high-speed airflow passes through the filter cylinder 112, it carries light bran powder and dust from the surface of the rice grains through the baffle 12 and into the collection box 13. The rice grains are trapped by the filter cylinder 112, achieving separation of rice from the airflow of light impurities. The screen plate 15 is arranged at an angle to intercept impurities carried by the airflow. The airflow passes through the screen plate. 15 is discharged by the vacuum pump 14. After the vacuum pump 14 stops, the vibration motor 16 is started. The vibration motor 16 drives the screen plate 15 to vibrate at high frequency to avoid impurities clogging the mesh. All the dust and impurities attached to the screen plate 15 fall off and are collected at the bottom of the collection box 13. The rotary motor 111 drives the filter screen cylinder 112 to rotate at a constant speed. The receiving tank circulates and receives rice. The guide plate 42 constrains the falling trajectory of the rice to prevent rice from splashing, ensuring thorough impurity removal, eliminating the interference of impurities on whiteness imaging, improving detection accuracy, and the unified collection of impurities facilitates centralized cleaning.

[0039] Reference Figures 3-7 As shown, in this embodiment, the device further includes a placement component 17, which is fixedly installed on the upper side wall of the detection platform 1. It can place rice separately. The placement component 17 includes a placement box 171, a sealing frame 172, a negative pressure box 18, a negative pressure pump 19, multiple support pipes 20, and multiple placement racks 21. The placement box 171 is fixedly connected to the upper side wall of the detection platform 1. The sealing frame 172 is fixedly connected to the inner wall of the placement box 171. The negative pressure box 18 is fixedly connected to the inner wall of the placement box 171. The suction end of the negative pressure pump 19 is connected to the negative pressure box 18. The multiple support pipes 20 are evenly distributed on the upper side wall of the negative pressure box 18 and are connected to the negative pressure box 18. The multiple placement racks 21 are respectively connected to the multiple support pipes 20. The same connecting platform is fixedly connected between two adjacent rows of placement racks 21.

[0040] During operation, after the rice sample is cleaned and impurities are removed, the linear screw module 72 moves the square cylinder 8 and the discharge pipe 10 to above the sealing frame 172. Then, the controller controls the filter cylinder 112 to rotate via the rotary motor 111. The rice in the receiving groove on the surface of the filter cylinder 112 is discharged sequentially from the discharge pipe 10 and evenly dispersed and slides onto each placement rack 21. Each placement rack 21 can only hold a single grain of rice to avoid rice grains piling up. The controller starts the negative pressure pump 19 to extract air from the inside of the negative pressure box 18. A stable negative pressure is formed inside the negative pressure box 18 and the support pipe 20. The negative pressure suction adsorbs and fixes the single grain of rice inside the placement rack 21. The sealing frame 172 surrounds the detection area of ​​the placement rack 21 and, together with the light shield 5 above, forms a light-proof chamber to further isolate stray light, providing a stable environment for standardized imaging of single grains of rice, realizing large-scale synchronous detection of single grains and improving detection efficiency.

[0041] Reference Figure 3 , Figures 8-11 As shown, in this embodiment, the device further includes a drive assembly 22, which is disposed inside the placement assembly 17 and enables the rice to rotate. The drive assembly 22 includes two fixed plates 221, two small electric push rods 222, a lifting frame 23, multiple rotating rods 24, multiple rubber wheels 25, and a reduction motor 26. The two fixed plates 221 are respectively fixedly connected to the left and right sides of the negative pressure box 18. The two small electric push rods 222 are respectively fixedly connected to the upper side walls of the two fixed plates 221. The lifting frame 23 is fixedly connected to the moving end of the two small electric push rods 222. The multiple rotating rods 24 are rotatably connected to the inner wall of the lifting frame 23. The multiple rubber wheels 25 are respectively fixedly connected to the rod walls of the multiple rotating rods 24. The reduction motor 26 is fixedly connected to the side wall of the lifting frame 23. The output end of the reduction motor 26 is connected to the multiple rotating rods 24 through a belt drive mechanism. The side wall of the placement frame 21 has an opening 27 that is compatible with the rubber wheels 25.

[0042] During operation, after the single-sided detection of the rice grain is completed, the controller opens the vent pipe of the negative pressure box 18 (not shown in the diagram) to release the negative pressure adsorption. The small electric push rods 222 on both sides push the lifting frame 23 upward simultaneously, driving the rotating rod 24 and rubber wheel 25 to move. The rubber wheel 25 passes through the side wall opening 27 of the placement frame 21, lifting the rice grain from both sides. Then, the reduction motor 26 drives all the rotating rods 24 and rubber wheel 25 to rotate in the same direction at a uniform speed through belt transmission. The rubber wheel 25 on both sides drives the rice grain to rotate smoothly by friction. The rice grain can be switched to face upward for detection at will. After the rotation is in place, the small electric push rod 222 falls back, and the negative pressure adsorption is restarted to fix the rice grain. The image sensor array 6 collects the whiteness image of the other side again. The cycle operation can complete the all-round multi-sided imaging of the rice grain, completely collect the grayscale data of the entire area of ​​the rice grain, eliminate the partial error caused by single-sided detection, require no manual intervention, have a high degree of automation, and the detection results are more consistent with the overall true whiteness index of the rice.

[0043] Reference Figures 3-5 As shown, further, in this embodiment, a recycling hood 28 is fixedly connected to the rear side wall of the discharge pipe 10, a recycling pipe 29 is fixedly connected between the recycling hood 28 and the square tube 8, a first control valve 30 is provided inside the recycling pipe 29, a sealing plate 31 is fixedly connected to the inner wall of the square tube 8, a short pipe 32 is inserted into the side wall of the sealing plate 31, a second control valve 33 is provided inside the short pipe 32, a rubber scraper 34 is fixedly connected to the rear side wall of the recycling hood 28, a recycling box 35 is fixedly connected to the upper side wall of the detection table 1, and a guide hood 36 located above the recycling box 35 is connected to the side wall of the placement box 171.

[0044] During operation, after all rice grains have undergone multi-faceted whiteness testing, the lead screw linear module 72 moves the recovery hood 28 horizontally above the sealing frame 172 and the placement rack 21. The controller closes the second control valve 33 in the short pipe 32 and opens the first control valve 30 in the recovery pipe 29. The vacuum pump 14 is restarted to create a negative pressure airflow. The negative pressure airflow draws all the rice grains in the placement rack 21 through the recovery hood 28 and flows along the recovery pipe 29 into the square cylinder 8 and the collection box 13, completing the automatic rice recovery. This avoids waste of raw materials and enables automatic collection of rice after testing, eliminating the need for manual picking, improving the efficiency of material processing after testing, and reducing rice loss.

[0045] Reference Figure 5 As shown, further, in this embodiment, a guide seat 37 is fixedly connected to the side wall of the collection box 13, an installation cavity 38 is opened on the side wall of the guide seat 37, and a sealing electric push rod 39 is fixedly connected to the side wall of the installation cavity 38. A sealing plate 40 is fixedly connected to the moving end of the sealing electric push rod 39. A discharge port is opened on the side wall of the collection box 13, and a baffle 41 located outside the discharge port is hinged to the side wall of the collection box 13.

[0046] During operation, the controller extends the electric push rod 39 to block the rice collection box 13, pushing the sealing plate 40 to close the lower discharge area. The airflow carrying the falling impurities accumulates on the sealing plate 40. After the rice collection is completed, the operator only needs to lift the baffle 41 to directly clean the dust and impurities accumulated on the sealing plate 40. After cleaning, the electric push rod 39 is controlled to pull the sealing plate 40 back, allowing the small amount of rice accumulated on the surface of the sealing plate 40 to fall into the bottom of the collection box 13 for easy collection. This structure allows for the temporary storage of impurities and rice in layers. Cleaning impurities does not require disassembling the box or stopping the machine, greatly simplifying the equipment operation and maintenance process, avoiding the blockage of airflow pipelines by impurities, and ensuring stable operation of long-term continuous online monitoring.

[0047] The operating principle of this invention is explained as follows: When the rice production line discharges, the drive motor 71 drives the linear screw module 72 to move the square cylinder 8 and the collection cover 9 to the discharge port to complete automatic sampling. The rice falls into the filter screen cylinder 112 inside the square cylinder 8. The linear screw module 72 drives the discharge pipe 10 to move above the sealing frame 172 inside the placement box 171. The rotary motor 111 drives the filter screen cylinder 112 to rotate, so that the rice falls evenly into each placement rack 21 through the discharge pipe 10. The vacuum pump 14 forms a negative pressure airflow to remove the bran powder impurities on the surface of the rice grains. The impurities are intercepted by the inclined mesh plate 15 with the vibration motor 16 inside the collection box 13. The negative pressure pump 19 generates negative pressure in the negative pressure box 18 and the support pipe 20 to adsorb and fix the individual rice grains. Then, the detection electric push rod 3 drives the lifting plate 4 and the light shield 5 to move down and fit together. The sealing frame 172 isolates stray light, and the image sensor array 6 acquires a single-sided whiteness image of the rice grain. After single-sided detection is completed, the negative pressure is released, and the small electric push rods 222 on both sides push the lifting frame 23 to move upward. The reduction motor 26 drives the rotating rod 24 and the rubber wheel 25 to pass through the opening 27 of the placement rack 21 to lift and rotate the rice grain, realizing multi-sided image acquisition. After all detections are completed, the lead screw linear module 72 drives the recycling cover 28 to move above the placement rack 21, and closes the second control valve 33 and opens the first control valve 30. The air pump 14 generates a negative pressure airflow to collect the rice grain through the recycling pipe 29 into the collection box 13. The sealing electric push rod 39 can push the sealing plate 40 to separate impurities and detected rice grains. Subsequently, the baffle 41 can be opened to clean the dust, waste and rice in the collection box 13.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A whiteness measuring instrument for rice detection, comprising a detection platform (1), a support frame (2), a detection electric push rod (3), a lifting plate (4), a light shield (5), and an image sensor array (6), wherein the support frame (2) is fixedly connected to the upper side wall of the detection platform (1), the detection electric push rod (3) is fixedly connected to the upper side wall of the support frame (2), the lifting plate (4) and the detection electric push rod (3) are connected to the moving end of the support frame (2), the image sensor array (6) is fixedly connected to the lower side wall of the lifting plate (4), and the light shield (5) is disposed on the outer wall of the lifting plate (4), characterized in that, Also includes: The sampling component (7) is set on the upper side wall of the detection station (1) to automatically extract an appropriate amount of the produced rice; The filter assembly (11) is disposed inside the sampling assembly (7) and can filter impurities mixed in with rice; The placement component (17) is fixedly installed on the upper side wall of the detection table (1) and can place rice separately; The drive component (22), located inside the placement component (17), is capable of rotating the rice.

2. The whiteness measuring instrument for rice detection according to claim 1, characterized in that, The sampling assembly (7) includes a drive motor (71), a lead screw linear module (72), a square tube (8), a collection cover (9), and a discharge pipe (10). The drive motor (71) is fixedly connected to the upper side wall of the detection table (1). The fixed part of the lead screw linear module (72) is fixedly connected to the output end of the drive motor (71). One end of the square tube (8) is a closed structure, and the other end is an open structure. The square tube (8) is fixedly connected to the moving end of the lead screw linear module (72). The collection cover (9) is fixedly connected to the upper side wall of the square tube (8), and the discharge pipe (10) is fixedly connected to the lower side wall of the square tube (8).

3. The whiteness measuring instrument for rice detection according to claim 1, characterized in that, The filter assembly (11) includes a rotary motor (111), a filter cylinder (112), a baffle (12), a collection box (13), a vacuum pump (14), a mesh plate (15), and a vibration motor (16). The rotary motor (111) is connected to the side wall of the square cylinder (8). The filter cylinder (112) and the rotary motor (111) are fixedly connected through the output end of the square cylinder (8). The surface of the filter cylinder (112) is provided with multiple receiving slots. The inner wall of the square cylinder (8) Two guide plates (42) are connected. The baffle (12) is fixedly connected to the inner wall of the square tube (8) and contacts the end of the filter screen tube (112) away from the rotary motor (111). The collection box (13) is connected to the end of the square tube (8) away from the rotary motor (111). The air pump (14) is connected to the collection box (13). The screen plate (15) is tilted and fixed to the inner wall of the collection box (13). The vibration motor (16) is connected to the side wall of the screen plate (15).

4. The whiteness measuring instrument for rice detection according to claim 2, characterized in that, The placement assembly (17) includes a placement box (171), a sealing frame (172), a negative pressure box (18), a negative pressure pump (19), multiple support pipes (20), and multiple placement racks (21). The placement box (171) is fixedly connected to the upper side wall of the testing platform (1). The sealing frame (172) is fixedly connected to the inner wall of the placement box (171). The negative pressure box (18) is fixedly connected to the inner wall of the placement box (171). The suction end of the negative pressure pump (19) is connected to the negative pressure box (18). The multiple support pipes (20) are evenly distributed on the upper side wall of the negative pressure box (18) and are connected to the negative pressure box (18). The multiple placement racks (21) are respectively connected to the multiple support pipes (20). The same connecting platform is fixedly connected between two adjacent rows of placement racks (21).

5. A whiteness measuring instrument for rice detection according to claim 4, characterized in that, The drive assembly (22) includes two fixed plates (221), two small electric push rods (222), a lifting frame (23), multiple rotating rods (24), multiple rubber wheels (25), and a geared motor (26). The two fixed plates (221) are respectively fixedly connected to the left and right sides of the negative pressure box (18), and the two small electric push rods (222) are respectively fixedly connected to the upper side walls of the two fixed plates (221). The lifting frame (23) is fixedly connected to the two small electric push rods (26). The moving end of the rod (222) is connected to the inner wall of the lifting frame (23) by multiple rotating rods (24). Multiple rubber wheels (25) are fixedly connected to the rod walls of the multiple rotating rods (24). The reduction motor (26) is fixedly connected to the side wall of the lifting frame (23). The output end of the reduction motor (26) is connected to the multiple rotating rods (24) through a belt drive mechanism. The side wall of the placement frame (21) is provided with an opening (27) that is compatible with the rubber wheels (25).

6. The whiteness measuring instrument for rice detection according to claim 4, characterized in that, A recycling hood (28) is fixedly connected to the rear side wall of the discharge pipe (10). A recycling pipe (29) is fixedly connected between the recycling hood (28) and the square tube (8). A first control valve (30) is provided inside the recycling pipe (29). A sealing plate (31) is fixedly connected to the inner wall of the square tube (8). A short pipe (32) is inserted into the side wall of the sealing plate (31). A second control valve (33) is provided inside the short pipe (32).

7. A whiteness measuring instrument for rice detection according to claim 6, characterized in that, A rubber scraper (34) is fixedly connected to the rear side wall of the recycling hood (28), a recycling box (35) is fixedly connected to the upper side wall of the detection table (1), and a guide cover (36) located above the recycling box (35) is connected to the side wall of the placement box (171).

8. A whiteness measuring instrument for rice detection according to claim 3, characterized in that, The side wall of the collection box (13) is fixedly connected to a guide seat (37), the side wall of the guide seat (37) is provided with an installation cavity (38), and the side wall of the installation cavity (38) is fixedly connected to a sealing electric push rod (39). The moving end of the sealing electric push rod (39) is fixedly connected to a sealing plate (40). The side wall of the collection box (13) is provided with a discharge port, and the side wall of the collection box (13) is hinged to a baffle (41) located outside the discharge port.

Images