Automatic rice quality detection device

Abstract

The utility model relates to the technical field of rice detection, and provides an automatic rice quality detection device. Comprising the steps that an impurity screening and weighing unit removes large-sample impurities in unprocessed rice grains through an impurity screening assembly, and semi-clean rice obtained through screening enters a lifting and feeding unit; semi-clean rice in the lifting and feeding unit quantitatively enters the light impurity separation unit, and after light impurities are sucked out through negative pressure, the obtained rice is weighed and then enters the image analysis unit to be detected; semi-clean rice in the lifting feeding unit quantitatively enters the rice hulling unit to be hulled to form brown rice; the obtained brown rice is weighed and then enters a visual detection unit for detection; the obtained brown rice is milled to form polished rice, and the polished rice enters an image analysis unit to be detected after being screened and weighed; and the semi-clean rice in the lifting feeding unit enters the moisture analysis unit for moisture content detection. The unhusked rice quality index detection device has the beneficial effects that the whole quality indexes of unhusked rice can be detected in an unmanned manner, the detection efficiency of the unhusked rice quality indexes is improved, errors caused by human sensory detection are reduced, and accurate detection results can be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of rice detection, in particular to an automatic rice quality detection device. Background Art

[0002] Rice is currently one of the most important food crops in my country, and the evaluation indicators for measuring rice quality include not only the test values ​​of the rice itself, but also the test values ​​of the brown rice and polished rice after rice processing. This requires corresponding testing of rice, as well as the brown rice and polished rice after rice processing, so the number of required testing items is relatively large.

[0003] The existing rice full quality index detection requires manual participation, has a low degree of automation, takes a long time to detect, and has low work efficiency. In view of this, the utility model is proposed. Utility Model Content

[0004] The utility model aims to provide a rice quality automatic detection device to solve the technical problems existing in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: an automatic rice quality detection device, comprising:

[0006] An impurity screening and weighing unit, wherein the impurity screening and weighing unit is used to remove large impurities in the raw rice grains through an impurity screening component to obtain semi-clean rice;

[0007] A lifting and feeding unit, wherein the lifting and feeding unit is used to remove light impurities in the semi-clean rice through negative pressure of a light impurity separation unit;

[0008] A rice husking unit, which is used for quantitatively husking the semi-clean rice in the lifting and feeding unit to form brown rice;

[0009] A rice polishing unit, the rice polishing unit is used for milling and screening the brown rice to obtain polished rice;

[0010] An image analysis unit is used to detect the semi-clean rice, brown rice and polished rice respectively.

[0011] In an optional embodiment, the large impurities and the semi-clean rice screened out by the impurity screening component are collected separately, the large impurities and the semi-clean rice are weighed, and the content of the large impurities in the raw rice is automatically calculated.

[0012] In an optional embodiment, the impurity screening assembly includes a first screening plate and a second screening plate, the aperture of the first screening plate is larger than the aperture of the second screening plate; the large sample impurities are respectively located on the first screening plate and under the second screening plate, and the semi-clean rice is located on the second screening plate;

[0013] A first brush plate is disposed between the first screen plate and the second screen plate, and the first brush plate is respectively attached to the lower surface of the first screen plate and the upper surface of the second screen plate.

[0014] In an optional embodiment, the rice obtained after the light impurities are removed by negative pressure suction of the light impurity separation unit is weighed to calculate the light impurity content in the semi-clean rice;

[0015] The image analysis unit detects organic impurities, inorganic impurities, brown rice outside the rice, and grain size of the rice obtained after the light impurities are removed by negative pressure suction of the light impurity separation unit;

[0016] The large impurities, the light impurities and the organic impurities and inorganic impurities detected by the image analysis unit are counted together into the total impurities of the raw rice grains to calculate the total impurity content of the raw rice grains.

[0017] In an optional embodiment, a negative pressure air suction port is provided on one side of the air suction duct in the light impurity separation unit, and a partition is provided between the air suction duct and the negative pressure air suction port; the negative pressure air suction port is connected to a negative pressure device.

[0018] In an optional embodiment, the brown rice is formed by husking the rice with a rice husker in the rice husking unit, and when the regulating valve is in the first position, the brown rice is weighed and then enters the image analysis unit to perform an imperfect grain detection of the brown rice, and the brown rice yield of the raw rice is automatically calculated;

[0019] The brown rice is formed by husking the rice with the rice husker in the rice husker unit. When the regulating valve is at the second position, the brown rice enters the rice polishing machine in the rice polishing unit. The polished rice formed by the rice polishing machine is sieved by the polished rice screening component and weighed. The polished rice then enters the image analysis unit to detect the proportion of whole polished rice grains, the proportion of yellow rice grains and the proportion of other types of polished rice, and automatically calculates the whole polished rice rate, yellow rice content, mutual mixing rate and rice output rate of the rice raw grains.

[0020] In an optional embodiment, the gap between two rollers in the rice husker is adjusted according to the grain size of the rice detected by the image analysis unit.

[0021] In an optional embodiment, the polished rice screening assembly includes a third screening plate, and the polished rice is located on the third screening plate; a second brush plate is provided below the third screening plate and is in contact with the lower surface thereof.

[0022] In an optional embodiment, the image analysis unit includes a light-transmitting rotating disk;

[0023] A first camera and a first light source are coaxially arranged and located above the light-transmitting rotating disk;

[0024] A second camera and a second light source are coaxially arranged and respectively located above and below the light-transmitting rotating disk;

[0025] A third camera and a third light source which are coaxially arranged are used together and are located below the light-transmitting rotating disk.

[0026] In an optional embodiment, a rotary valve is respectively provided in the impurity screening and weighing unit and the light impurity separation unit, and a plurality of blades are provided inside the rotary valve, and V-shaped grooves of equal sizes are formed between adjacent blades.

[0027] The beneficial effects of the utility model are that the device can detect all quality indicators of rice without human intervention, such as moisture content, impurity content, brown rice outside the rice, rough rice yield, whole polished rice yield, yellow rice content, mutual mixing rate, rice yield and imperfect grains. The device is easy to operate and has a high degree of automation. It improves the detection efficiency of rice quality indicators, reduces errors in human sensory detection, and can provide more objective detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of the automatic rice quality detection device provided in one embodiment of the utility model.

[0030] Figure 2 This is a schematic diagram of the structure of the main detection components inside the automatic rice quality detection device provided in one embodiment of the utility model.

[0031] Figure 3 The structure of the impurity screening weighing unit in the automatic rice quality detection device provided in one embodiment of the utility model is schematically shown. Figure 1 .

[0032] Figure 4 The structure of the impurity screening weighing unit in the automatic rice quality detection device provided in one embodiment of the utility model is schematically shown. Figure 2 .

[0033] Figure 5 It is a schematic structural diagram of a feed component and an impurity screening component in an impurity screening weighing unit provided in one embodiment of the utility model.

[0034] Figure 6 The structure of the impurity screening component in the impurity screening weighing unit provided in one embodiment of the utility model is schematically shown. Figure 1 .

[0035] Figure 7 The structure of the impurity screening component in the impurity screening weighing unit provided in one embodiment of the utility model is schematically shown. Figure 2 .

[0036] Figure 8 The present invention is a schematic structural diagram of a rice husking unit, a rice polishing unit and an image analysis unit in an automatic rice quality detection device provided in one embodiment of the present invention.

[0037] Fig. 9 for Figure 8 Schematic diagram of the local enlarged structure at point A in the middle.

[0038] Fig.10 It is a structural schematic diagram of a polished rice screening component in a polished rice unit provided in one embodiment of the utility model.

[0039] Fig.11 This is a schematic diagram of the structure of the main weighing unit used in the automatic rice quality detection device.

[0040] Fig.12 The structure diagram of the image analysis unit in the automatic rice quality detection device is shown in FIG. Figure 1 .

[0041] Fig.13 The structure diagram of the image analysis unit in the automatic rice quality detection device is shown in FIG. Figure 2 .

[0042] 1-impurity screening weighing unit; 11-feeding hopper; 12-first rotary valve, 121-first blade, 122-first V-shaped groove; 13-impurity screening assembly, 131-first chamber, 132-first screening plate, 133-second chamber, 134-rice outlet, 135-impurity outlet, 136-first vibrator, 137-second screening plate, 138-first transmission belt, 139-first brush plate, 1310-second transmission belt, 1311-third chamber; 14-first receiving hopper, 141-first feeding end, 142-first weighing sensor, 143-first baffle; 15-impurity receiving hopper, 151-second feeding end, 152-second weighing sensor, 153-second baffle;

[0043] 2- Moisture analysis unit;

[0044] 3-rice husking unit; 31-second receiving hopper, 32-third weighing sensor, 33-regulating valve, 34-rice husking machine, 35-first discharging end, 36-second discharging end;

[0045] 4-rice polishing unit; 41-rice polishing machine receiving hopper; 42-rice polishing machine, 43-rice polishing screening assembly, 431-fourth chamber, 432-fifth chamber, 433-third screening plate, 434-third transmission belt, 435-second vibrator, 436-rice polishing discharge end, 437-impurity discharge end; 44-impurity outlet pipe;

[0046] 5-image analysis unit, 51-cleaning brush, 52-light-transmitting turntable, 53-material receiving box, 54-arc-shaped baffle plate, 55-first camera, 551-first light source, 56-second camera, 561-second light source, 57-third camera, 571-third light source;

[0047] 6-lifting feeding unit, 61-first feeding hopper, 611-third baffle, 62-third vibrator, 63-horizontal moving module;

[0048] 7-light impurity separation unit, 71-third receiving hopper, 72-fourth weighing sensor, 73-second rotary valve, 731-second blade, 74-air suction duct, 741-negative pressure air suction port, 742-partition plate, 75-material guide pipe, 751-first port, 752-second port, 753-third port;

[0049] 8-housing, 81-housing body, 82-human-computer interaction interface.

[0050] 9 - main weighing unit, 91 - fourth weighing sensor, 92 - second feeding hopper, 94 - fourth vibrator. DETAILED DESCRIPTION

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0053] Please refer to the attached Figure 1-13 The purpose of this embodiment is to provide an automatic rice quality detection device, including: a housing 8, a housing body 81 of the housing 8 is provided with a human-machine interaction interface 82 for inputting commands and viewing detection data. The internal frame of the housing body 81 is provided with a variety of components.

[0054] Specifically, an impurity screening and weighing unit 1 is disposed inside the outer shell body 81 . The impurity screening and weighing unit 1 removes large impurities in the raw rice grains through the impurity screening component 13 , and the semi-clean rice obtained after screening enters the lifting and feeding unit 6 .

[0055] See attached Figure 2-3 The impurity screening and weighing unit 1 includes a feed hopper 11, which is connected to a first rotary valve 12. A plurality of first blades 121 are arranged inside the first rotary valve 12, and first V-shaped grooves 122 of equal size are formed between adjacent first blades 121. Through the above structure, the raw rice can be evenly transported to the impurity screening component 13.

[0056] It should be noted that see Appendix Figure 5-7 The impurity screening assembly 13 includes a first chamber 131, a second chamber 133 and a third chamber 1311 which are arranged in sequence from top to bottom. A first screening plate 132 is arranged between the first chamber 131 and the second chamber 133, and a second screening plate 137 is arranged between the second chamber 133 and the third chamber 1311. The aperture of the first screening plate 132 is larger than that of the second screening plate 137. Large impurities are respectively located on the first screening plate 132 and under the second screening plate 137, and semi-clean rice is located on the second screening plate 137.

[0057] In addition, a first brush plate 139 is provided between the first sieve plate 132 and the second sieve plate 137, and the first brush plate 139 is respectively attached to the lower surface of the first sieve plate 132 and the upper surface of the second sieve plate 137. The first sieve plate 132 moves under the action of the first transmission belt 138 and the second transmission belt 1310 to complete the cleaning of the two sieve plates. The bottom of the third chamber 1311 is the first vibrator 136. Under the action of the first vibrator 136, the semi-clean rice in the second chamber 133 is collected at the rice outlet 134. The rice outlet 134 is connected to the first receiving hopper 14 through the first feeding end 141. The first receiving hopper 14 is provided with a first weighing sensor 142 and a first baffle 143. The first weighing sensor 142 is used to measure the weight of the semi-clean rice entering the first receiving hopper 14. The large impurities in the first chamber 131 and the third chamber 1311 are collected at the impurity outlet 135, and the impurity outlet 135 is connected to the impurity receiving hopper 15 through the second feed end 151. The impurity receiving hopper 15 is provided with a second weighing sensor 152 and a second baffle 153, and the second weighing sensor 152 is used to measure the weight of the large impurities entering the impurity receiving hopper 15. The first baffle 143 and the second baffle 153 can be opened and closed.

[0058] The above structure can collect the large impurities and semi-clean rice screened out by the impurity screening component 13, weigh the large impurities and semi-clean rice, and automatically calculate the content of large impurities in the raw rice.

[0059] Furthermore, after the semi-clean rice in the first receiving hopper 14 is weighed, it enters the first feeding hopper 61 of the lifting feeding unit 6. The front end of the first feeding hopper 61 is provided with a third baffle 611 that can be opened and closed. The bottom of the first feeding hopper 61 is a third vibrator 62. The first receiving hopper 14 can move along the horizontal moving module 63. The first receiving hopper 14 can move up and down under the action of the lifting mechanism. When the receiving hopper used in conjunction with the first feeding hopper 61 reaches the set feeding amount through the weighing sensor, the first feeding hopper 61 and the receiving hopper used in conjunction with it stop feeding and receiving materials at the same time, that is, close the corresponding baffles to achieve interlocking, and stop feeding and receiving materials.

[0060] Among them, the semi-clean rice in the lifting and feeding unit 6 enters the light impurity separation unit 7 in a quantitative manner, and the rice obtained after the light impurities are removed by negative pressure in the light impurity separation unit 7 is weighed and then enters the image analysis unit 5 for detection.

[0061] In this embodiment, see the attached Figure 8-9The light impurity separation unit 7 includes a third receiving hopper 71 at the top, and the third receiving hopper 71 is provided with a fourth weighing sensor 72, which is used to cooperate with the lifting and feeding unit 6 to complete quantitative material receiving. The third receiving hopper 71 is connected to the second rotary valve 73, and a plurality of second blades 731 are arranged inside the second rotary valve 73, and second V-shaped grooves of equal sizes are formed between adjacent second blades 731. Through the above structure, the semi-clean rice can be evenly transported to the suction duct 74, and a negative pressure suction port 741 is arranged on one side of the suction duct 74, and a partition 742 is arranged between the suction duct 74 and the negative pressure suction port 741; the negative pressure suction port 741 is connected to the negative pressure device, and the light impurities in the semi-clean rice can be removed through the above structure. The air suction channel 74 is connected to the first port 751 of the guide pipe 75 , and the second port 752 of the guide pipe 75 is connected to the second feeding hopper 92 of the main weighing unit 9 . The second feeding hopper 92 is provided with a fourth weighing sensor 91 , and a fourth vibrator 94 is provided below the second feeding hopper 92 .

[0062] The rice obtained after the light impurities are removed by negative pressure suction of the light impurities separation unit 7 enters the second feeding hopper 92 through the guide pipe 75 for weighing, and the light impurities content in the semi-clean rice is calculated; the image analysis unit 5 detects the organic impurities, inorganic impurities, brown rice outside the rice grains and the grain size of the rice obtained after the light impurities are removed by negative pressure suction of the light impurities separation unit 7. The large sample impurities, light impurities and organic impurities and inorganic impurities detected by the image analysis unit 5 are counted together into the total impurities of the raw rice grains, and the total impurity content of the raw rice grains is calculated. Among them, brown rice outside the rice grains is the percentage of brown rice in the feed amount of the rice, the organic impurities are grass seeds, foreign grains, straw, etc., and the inorganic impurities are stones, glass, tiles, etc.

[0063] Please continue to refer to the attached Figure 8-9 , further, the semi-clean rice in the lifting and feeding unit 6 is quantitatively fed into the rice husking unit 3, husked to form brown rice; the obtained brown rice is weighed and fed into the visual inspection unit 5 for inspection. Among them, the rice husking unit 3 includes a second receiving hopper 31, and a third weighing sensor 32 is arranged on the second receiving hopper 31, which is used to cooperate with the lifting and feeding unit 6 to complete the quantitative feeding. The second receiving hopper 31 is connected to the rice husking machine 34, and the gap between the two rollers of the rice husking machine 34 is adjusted according to the grain size of the rice detected by the image analysis unit 5. A regulating valve 33 is arranged in the rice husking machine 34, and the rice husking machine 34 is provided with a first discharging end 35 and a second discharging end 36. The first discharging end 35 is connected to the rice polishing machine receiving hopper 41 of the 42-rice polishing machine, and the second discharging end 36 is connected to the third port 753 of the guide pipe 75.

[0064] The rice is husked by the rice husker 34 in the rice husking unit 3 to form brown rice. When the regulating valve 33 is in the first position, the brown rice enters the main weighing unit 9 through the material guide pipe 75 for weighing and then enters the image analysis unit 5 for imperfect grain detection of brown rice, and the brown rice yield rate of the raw rice is automatically calculated, and the brown rice yield rate = (brown rice weight - imperfect grain weight / 2) / half net rice weight. Imperfect grains are brown rice grains with defects such as insect damage, disease spots, sprouts, mildew, damage, frostbite, baking damage or undercookedness.

[0065] Also, please refer to the attached Figure 8-10 The obtained brown rice is milled by the rice polishing unit 4 to form polished rice, and the polished rice is screened and weighed before entering the image analysis unit 5 for detection. The rice polishing unit 4 includes a rice polishing machine 42, on which a rice polishing machine receiving hopper 41 is provided, and the discharge end of the rice polishing machine 42 is connected to a polished rice screening assembly 43, and the polished rice screening assembly 43 includes a fourth chamber 431 and a fifth chamber 432, between which a third screening plate 433 is provided, and the polished rice is located on the third screening plate 433; a second brush plate is provided below the third screening plate 433 and is attached to its lower surface, and the second brush plate moves and cleans the third screening plate 433 under the drive of the third transmission belt 434. After screening, the polished rice enters the main weighing unit 9 for weighing through the polished rice discharge end 436, and the impurities enter the receiving box 53 through the impurity outlet pipe 44.

[0066] The rice is husked by the rice husker 34 in the rice husker unit 3 to form brown rice. When the regulating valve 33 is in the second position, the brown rice enters the rice polishing machine 42 in the rice polishing unit 4. The polished rice formed by the rice polishing machine 42 is weighed after being sieved by the polished rice screening component 43, and then enters the image analysis unit 5 to detect the proportion of whole polished rice grains, the proportion of yellow rice grains, the proportion of other types of polished rice, the weight ratio of polished rice to rice grains after sieving, and the imperfect grains of polished rice, and automatically calculate the whole polished rice rate, yellow rice content, mutual mixing rate, rice yield rate, and imperfect grains of polished rice of the rice raw grain. Among them, the whole polished rice rate refers to the weight of grains with a grain length of more than three quarters / the weight of rice grains. Yellow rice refers to rice grains with yellow endosperm, which is significantly different from the color of normal rice grains and is consistent with or darker than the color of the rice color yellowness index standard sample. The mutual mixing rate refers to the proportion of other types of rice mixed in this type of rice. The rice yield refers to the mass fraction of rice milled to the fine grinding precision in the rice sample, expressed as the net rice yield (%). The imperfect grains of polished rice refer to the following rice grains that are still valuable for use: insect-damaged grains, immature grains, diseased grains and moldy grains.

[0067] In this embodiment, the semi-clean rice in the lifting and feeding unit 6 enters the moisture analysis unit 2 for moisture content detection.

[0068] Please see attached Figure 11-13As the main detection device of this embodiment, the image analysis unit 5 includes a light-transmitting turntable 52; a first camera 55 and a first light source 551 are coaxially arranged and located above the light-transmitting turntable 52 to capture the front image of the detected semi-clean rice, brown rice, and polished rice. A second camera 56 and a second light source 561 are coaxially arranged and located above and below the light-transmitting turntable 52 to capture the internal perspective image of the detected semi-clean rice, brown rice, and polished rice. A third camera 57 and a third light source 571 are coaxially arranged and located below the light-transmitting turntable 52 to capture the back image of the detected semi-clean rice, brown rice, and polished rice. The image analysis unit 5 also includes a cleaning belt brush 51 and an arc-shaped material baffle plate 54. The cleaning belt brush 51 is used to remove the detected semi-clean rice, brown rice, and polished rice from the light-transmitting turntable 52, and the arc-shaped material baffle plate 54 is used to prevent the semi-clean rice, brown rice, and polished rice from falling from the light-transmitting turntable 52 during the feeding process.

[0069] Any modifications, equivalent substitutions and improvements made within the spirit and principles of this utility model should be included in the protection scope of this utility model.

Claims

1. A rice quality automatic detection device, characterized in that: include: An impurity screening and weighing unit (1), wherein the impurity screening and weighing unit (1) is used to remove large impurities in raw rice grains through an impurity screening component (13) to obtain semi-clean rice; A lifting and feeding unit (6), wherein the lifting and feeding unit (6) is used to remove light impurities in the semi-clean rice by negative pressure suction through a light impurity separation unit (7); A rice husking unit (3), the rice husking unit (3) being used for quantitatively husking the semi-clean rice in the lifting and feeding unit (6) to form brown rice; A rice polishing unit (4), the rice polishing unit (4) being used for milling and screening the brown rice to obtain polished rice; An image analysis unit (5), wherein the image analysis unit (5) is used to detect the semi-clean rice, brown rice and polished rice respectively.

2. The automatic rice quality detection device according to claim 1, characterized in that: The large impurities and the semi-clean rice sieved by the impurity screening component (13) are collected separately, the large impurities and the semi-clean rice are weighed, and the content of the large impurities in the raw rice is automatically calculated.

3. The automatic rice quality detection device according to claim 2, characterized in that: The impurity screening component (13) comprises a first screening plate (132) and a second screening plate (137); the aperture of the first screening plate (132) is larger than the aperture of the second screening plate (137); the large sample impurities are respectively located on the first screening plate (132) and under the second screening plate (137); the semi-clean rice is located on the second screening plate (137); A first brush plate (139) is provided between the first sieve plate (132) and the second sieve plate (137), and the first brush plate (139) is respectively in contact with the lower surface of the first sieve plate (132) and the upper surface of the second sieve plate (137).

4. The automatic rice quality detection device according to claim 3, characterized in that: Weigh the rice obtained after the light impurities are removed by negative pressure suction in the light impurity separation unit (7), and calculate the light impurity content in the semi-clean rice; The image analysis unit (5) detects organic impurities, inorganic impurities, brown rice outside the rice, and grain size of the rice obtained after the light impurities are removed by negative pressure suction of the light impurity separation unit (7); The large impurities, the light impurities and the organic impurities and inorganic impurities detected by the image analysis unit (5) are counted together into the total impurities of the raw rice grains to calculate the total impurity content of the raw rice grains.

5. The automatic rice quality detection device according to claim 4, characterized in that: A negative pressure air suction port (741) is provided on one side of the air suction duct (74) in the light impurity separation unit (7), and a partition (742) is provided between the air suction duct (74) and the negative pressure air suction port (741); the negative pressure air suction port (741) is connected to a negative pressure device.

6. The automatic rice quality detection device according to claim 4, characterized in that: The brown rice is husked by a rice husker (34) in the rice husking unit (3), and when the regulating valve (33) is in the first position, the brown rice is weighed and then enters the image analysis unit (5) for detecting imperfect grains of the brown rice, and the brown rice yield of the raw rice is automatically calculated; The brown rice is husked by the rice husker (34) in the rice husker unit (3). When the regulating valve (33) is in the second position, the brown rice enters the rice polishing machine (42) in the rice polishing unit (4). The polished rice formed by the rice polishing machine (42) is sieved by the rice polishing screening component (43) and then weighed. The polished rice then enters the image analysis unit (5) to detect the proportion of whole polished rice grains and the proportion of yellow rice grains, and automatically calculates the whole polished rice rate, yellow rice content, intermixing rate and rice yield of the rice raw grains.

7. The automatic rice quality detection device according to claim 6, characterized in that: The gap between the two rollers in the rice husker (34) is adjusted according to the grain size of the rice detected by the image analysis unit (5).

8. The automatic rice quality detection device according to claim 6, characterized in that: The polished rice screening component (43) comprises a third screening plate (433), and the polished rice is located on the third screening plate (433); a second brush plate is arranged below the third screening plate (433) and is in contact with the lower surface thereof.

9. The automatic rice quality detection device according to claim 1, characterized in that: The image analysis unit (5) comprises a light-transmitting rotating disk (52); A first camera (55) and a first light source (551) are coaxially arranged and located above the light-transmitting rotating disk (52); A coaxially arranged second camera (56) and a second light source (561) are respectively located above and below the light-transmitting rotating disk (52); A third camera (57) and a third light source (571) which are coaxially arranged are located below the light-transmitting rotating disk (52).

10. The automatic rice quality detection device according to claim 1, characterized in that: The impurity screening and weighing unit (1) and the light impurity separation unit (7) are each provided with a rotary valve, a plurality of blades are provided inside the rotary valve, and V-shaped grooves of equal size are formed between adjacent blades.

Images