Device for detecting the loss of cereal grains

Abstract

The application discloses a kind of detection devices of grain loss amount, including mounting frame;Material throwing subassembly, including inner material disc, outer material disc and with the first driver of inner material disc drive connection;Outer material disc is fixedly arranged in mounting frame, inner material disc is rotationally arranged in outer material disc, the side wall of outer material disc is through with first discharge port, inner material disc hollow is formed for accommodating the accommodation cavity of grain, the side wall of inner material disc is through with the second discharge port being communicated with accommodation cavity;Detection subassembly, including vibration frame, movable frame, detector and multiple elastic members;Movable frame is arranged on mounting frame, one end of multiple elastic members is connected with vibration frame, the other end is connected with movable frame, detector is set on the top of vibration frame. Inner material disc is rotated to the second discharge port and first discharge port corresponding communication when, so that grain is thrown out, when grain thrown out collides with detector, detector carries out calculation according to the vibration amplitude of vibration frame, effectively simulates the real operating environment of combine harvester.

Description

Technical Field

[0001] This invention relates to the technical field of grain detection, and more particularly to a device for detecting grain loss. Background Technology

[0002] Combine harvesters have greatly facilitated the harvesting of grains. However, some grain loss is inevitable during combine harvesting; therefore, the amount of grain loss is a crucial indicator of combine harvester performance. Currently, research often employs piezoelectric-based loss detection sensors to monitor and record the impact signals of lost grains in real time.

[0003] In some related technologies, most test benches for calibrating the performance of detectors for grain loss are based on a conveyor belt. Grains or impurities are placed on the conveyor belt, and the sensor is placed below the conveyor belt, so that the grains and impurities fall onto the loss detection sensor at a certain speed. However, this approach has certain limitations: the grains are relatively concentrated at the sensor impact point and are not arbitrary, so it is difficult to accurately simulate the real operating environment of a combine harvester and cannot reflect the real detection environment. Summary of the Invention

[0004] To overcome the shortcomings of existing technical solutions, embodiments of the present invention provide a device for detecting grain loss.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A device for detecting grain loss, the device comprising:

[0007] Mounting rack;

[0008] A material-throwing assembly includes an inner material tray, an outer material tray, and a first driver connected to the inner material tray. The outer material tray is fixedly mounted on the mounting frame, and the inner material tray is rotatably mounted inside the outer material tray. A first discharge port is formed through the side wall of the outer material tray. The inner material tray is hollow and forms a receiving cavity for accommodating grains. A second discharge port communicating with the receiving cavity is formed through the side wall of the inner material tray. When the first driver drives the inner material tray to rotate circumferentially until the second discharge port communicates with the first discharge port, the grains are thrown out.

[0009] The detection assembly includes a vibration frame, a movable frame, a detector, and multiple elastic elements. The movable frame is mounted on the mounting frame. One end of each elastic element is connected to the vibration frame, and the other end is connected to the movable frame. The detector is located on the top of the vibration frame and is used to detect the amount of grain loss after it is thrown out.

[0010] As a preferred embodiment of the present invention, the material throwing assembly further includes an adjustment part, which is movably disposed in the first discharge port; when the adjustment part moves along the length of the first discharge port, it increases or decreases the outer diameter of the first discharge port.

[0011] As a preferred embodiment of the present invention, the inner material tray has a feeding section that communicates with the accommodating cavity.

[0012] As a preferred embodiment of the present invention, the detection assembly further includes a rotating plate and a second driver; the detector is disposed on the rotating plate, one side of the rotating plate is rotatably connected to the top of the vibration frame, and the second driver is drivenly connected to the rotating plate; when the second driver drives the rotating plate to rotate, the orientation of the detector is adjusted.

[0013] In a preferred embodiment of the present invention, the second driver includes a push rod, a first motor, a first moving part, and a first lead screw; the first moving part is threadedly connected to the first lead screw, one end of the push rod is rotatably connected to the first moving part, and the other end of the push rod is rotatably connected to the rotating plate; the output shaft of the first motor is connected to one end of the first lead screw; when the first motor drives the first lead screw to rotate circumferentially, the first moving part moves axially along the first lead screw, so that the push rod drives the rotating plate to rotate.

[0014] As a preferred embodiment of the present invention, the movable frame includes a base plate and a plurality of connecting columns disposed on the top of the base plate;

[0015] Multiple elastic elements are provided. At least one elastic element has its two ends connected to the bottom of the base plate and the bottom of the vibration frame, respectively. The other elastic elements have the same end connected to the vibration frame and the other end connected to each of the connecting columns.

[0016] As a preferred embodiment of the present invention, a third driver is further included, which is connected to the movable frame and is used to drive the movable frame to move.

[0017] As a preferred embodiment of the present invention, the third driver includes a second motor, a second lead screw, and a second moving part; the movable frame is disposed on the second moving part, the second moving part is threadedly connected to the second lead screw, and the output shaft of the second motor is drivenly connected to one end of the second lead screw; when the second motor drives the second lead screw to rotate, the second moving part moves along the axial direction of the second lead screw to drive the movable frame to move.

[0018] As a preferred technical solution of the present invention, there are two second drivers, with the second lead screw of the first second driver and the second lead screw of the second second driver being arranged perpendicularly to each other.

[0019] As a preferred embodiment of the present invention, it further includes at least two clamping components for clamping the outer material tray.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The first driver drives the inner material tray to rotate circumferentially. When the inner material tray rotates, it reaches a certain speed, causing a large amount of grain to shake rapidly in the receiving cavity. When the inner material tray rotates to the point where the second discharge port connects with the first discharge port, the grain is thrown out. When the thrown-out grain collides with the detector, it causes the entire vibrating frame to produce small-amplitude and irregular vibrations. The detector then performs calculations based on the vibration amplitude of the vibrating frame to obtain the amount of grain loss. This setup can effectively simulate the real operating environment of a combine harvester and improve the accuracy of obtaining the amount of grain loss caused by the combine harvester during operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an overall structural diagram of an embodiment of the present invention.

[0024] Figure 2 This is an exploded view of the material-throwing assembly according to an embodiment of the present invention.

[0025] Figure 3 This is a structural diagram of the detection component according to an embodiment of the present invention.

[0026] Figure 4 This is a structural diagram of the third driver according to an embodiment of the present invention.

[0027] Numbers in the diagram

[0028] 1. Mounting bracket;

[0029] 2. Material feeding assembly; 21. Inner material tray; 211. Second discharge port; 212. Feeding section; 22. Outer material tray; 221. First discharge port; 23. First driver; 24. Adjustment section;

[0030] 3. Detection assembly; 31. Vibration frame; 32. Movable frame; 321. Connecting column; 322. Base plate; 33. Detector; 34. Elastic element; 35. Rotating plate; 351. Hinge; 36. Second driver; 361. Push rod; 362. First motor; 363. First moving part; 364. First lead screw;

[0031] 4. Third drive unit; 41. Second motor; 42a. Second lead screw a; 42b. Second lead screw b; 43. Second moving part;

[0032] 5. Clamping components. Detailed Implementation

[0033] To make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following describes this application in further detail with reference to the accompanying drawings and embodiments.

[0034] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0035] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0036] When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0039] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0040] In order to address the technical problem that existing technologies use conveyor belts to transport grains, the grains are relatively concentrated on the collision surface of the collision detector 33 and are not arbitrary, thus making it difficult for such detectors 33 to accurately simulate the real operating environment of combine harvesters and reflect the real detection environment.

[0041] The following describes in detail the specific structure of a grain loss detection device provided by an embodiment of the present invention, according to the appendix. Figure 1-4 As shown, the specific structure of the detection device includes a mounting frame 1, a material throwing assembly 2, and a detection assembly 3.

[0042] Mounting bracket 1 is used to support the material throwing assembly 2 and the detection assembly 3, thereby preventing the material throwing assembly 2 and the detection assembly 3 from detaching during operation.

[0043] According to the appendix Figure 2 As shown, in order to simulate the situation where grains fall out of the combine harvester during operation and to detect the loss value of grains, the throwing assembly 2 includes an inner material tray 21, an outer material tray 22, and a first driver 23 drivenly connected to the inner material tray 21. The outer material tray 22 is fixedly mounted on the mounting frame 1, and the inner material tray 21 is rotatably mounted inside the outer material tray 22. A first discharge port 221 is passed through the side wall of the outer material tray 22. The inner material tray 21 is hollow and has a receiving cavity for accommodating grains. A second discharge port 211 is passed through the side wall of the inner material tray 21 and communicates with the receiving cavity. When the first driver 23 drives the inner material tray 21 to rotate circumferentially until the second discharge port 211 is connected to the first discharge port 221, the grains are thrown out.

[0044] Specifically, a large amount of grain is temporarily stored in the receiving cavity of the inner material tray 21 (if the first discharge port 221 and the second discharge port 211 are staggered, it can prevent excessive grain from falling outside the receiving cavity). The inner material tray 21 is rotated around its circumference by starting the first driver 23. By rotating the inner material tray 21 at a certain speed, a large amount of grain is made to shake rapidly in the receiving cavity. When the inner material tray 21 rotates to the point where the second discharge port 211 and the first discharge port 221 are connected, some grains are simultaneously inserted through the second discharge port 211 and the first discharge port 221 and fall outward, thereby achieving the effect of throwing out some grains. This makes it easier for the detection component 3 to detect the amount of grain loss after being thrown out. Compared with the traditional conveyor belt conveying scheme, this scheme is more accurate.

[0045] If the inner material tray 21 rotates until the second discharge port 211 is misaligned with the first discharge port 221, the grains will continue to shake rapidly in the receiving cavity.

[0046] It should be noted that since the second discharge port 211 and the first discharge port 221 are both located at the same height, when the inner material plate 21 rotates to a certain range, the second discharge port 211 can be connected to the first discharge port 221, and at this time, some grains can be thrown out.

[0047] It should also be noted that the outer material tray 22 has a hollow mounting cavity for assembling the inner material tray 21 into the mounting cavity. Specifically, the outer wall of the inner material tray 21 is interference-fitted with the cavity wall of the mounting cavity, so that when the inner material tray 21 rotates at high speed in the circumferential direction, the grains cannot fall out from the gap between the outer wall of the inner material tray 21 and the cavity wall of the mounting cavity.

[0048] It is understood that the inner material tray 21 in this embodiment is cylindrical and the mounting cavity is circular; this design improves the stability of the inner material tray 21 when it rotates at high speed in the mounting cavity.

[0049] According to the appendix Figure 3 As shown, the detection component 3 includes a vibration frame 31, a movable frame 32, a detector 33, and multiple elastic elements 34. The movable frame 32 is mounted on the mounting frame 1. One end of each of the multiple elastic elements 34 is connected to the vibration frame 31, and the other end of each of the multiple elastic elements 34 is connected to the movable frame 32. The detector 33 is located on the top of the vibration frame 31 and is used to detect the amount of grain loss after it is thrown out.

[0050] Specifically, since the detector 33 is located at the top of the vibration frame 31 and within the drop range of the grains being thrown out, some grains can collide with the detector 33 when they fall, and under the action of the elastic member 34, the entire vibration frame 31 vibrates. The detector 33 is then used to detect the amount of grain loss in the simulation process.

[0051] It should be noted that, since multiple elastic elements 34 are used to support the entire vibration frame 31, when the thrown grains collide with the detector 33, the entire vibration frame 31 will produce small-amplitude and irregular vibrations. That is, the multiple elastic elements 34 push or pull the vibration frame 31, thereby achieving omnidirectional vibration. Then, the detector 33 performs calculations based on the vibration amplitude of the vibration frame 31 to obtain the amount of grain loss.

[0052] Specifically, it should be noted that the detector 33 calculates the elastic coefficient (k) of the object according to Hooke's Law. For example, if a grain collides with the detector 33, the elastic coefficient of the spring is calculated according to the elastic characteristics of the spring, that is, Hooke's Law formula F = -kx, where F is the restoring force generated by the vibration and x is the displacement of the object. Substituting the maximum amplitude into the formula, we get k = F / x.

[0053] It is understood that the elastic element in this embodiment of the invention is a spring.

[0054] In summary, the first driver 23 drives the inner material tray 21 to rotate circumferentially. When the inner material tray 21 rotates, it reaches a certain speed, causing a large amount of grain to shake rapidly in the accommodating cavity. When the inner material tray 21 rotates to the point where the second discharge port 211 and the first discharge port 221 are connected, the grain is thrown out. When the thrown-out grain collides with the detector 33, the entire vibrating frame 31 produces small-amplitude and irregular vibrations. The detector 33 then performs calculations based on the vibration amplitude of the vibrating frame 31 to obtain the amount of grain loss. This configuration can effectively simulate the real operating environment of a combine harvester and improve the accuracy of obtaining the amount of grain loss caused by the combine harvester during operation. In other words, compared with the traditional conveyor belt solution, the grain loss obtained in this embodiment of the invention is more accurate.

[0055] To simulate grain loss rates under different types of combine harvesters; therefore, according to the attached... Figure 2 As shown, in a specific embodiment, the feeding assembly 2 further includes an adjustment part 24, which is movably disposed in the first discharge port 221. When the adjustment part 24 moves along the length of the first discharge port 221, it increases or decreases the outer diameter of the first discharge port 221. Specifically, by pushing the adjustment part 24 to move in the first discharge port 221, the amount of grain grains fed out can be adjusted.

[0056] For example, when the adjusting part 24 is pushed to move along one end of the first discharge port 221, the outer diameter of the first discharge port 221 is increased, and the inner material plate 21 can be thrown out when it rotates. Conversely, when the adjusting part 24 is pushed to move along the other end of the first discharge port 221, the outer diameter of the first discharge port 221 is reduced, and the inner material plate 21 can be thrown out when it rotates, so as to adjust the amount of grains thrown out.

[0057] It is understood that the first discharge port 221 in this embodiment of the invention is a guide groove used to guide the movement of the adjustment part 24; there are two adjustment parts 24, that is, when the two adjustment parts 24 move closer to each other, the outer diameter of the first discharge port 221 is reduced, and when the two adjustment parts 24 move further away from each other, the outer diameter of the first discharge port 221 is increased.

[0058] According to the appendix Figure 2 As shown, in a specific embodiment, the inner material tray 21 has a feeding section 212 that communicates with the accommodating cavity. Test personnel can use the feeding section 212 to feed different amounts of grains into the accommodating cavity. It is understood that the feeding section 212 in this embodiment is a funnel.

[0059] The orientation of detector 33 is adjusted to ensure that grains thrown in different directions can collide with detector 33; therefore, according to the attached... Figure 2 As shown, in a specific embodiment, the detection component 3 further includes a rotating plate 35 and a second driver 36; the detector 33 is disposed on the rotating plate 35, one side of the rotating plate 35 is rotatably connected to the top of the vibration frame 31, and the second driver 36 is drivenly connected to the rotating plate 35; when the second driver 36 drives the rotating plate 35 to rotate, the orientation of the detector 33 is adjusted.

[0060] Specifically, the detector 33 is disposed on the top side of the rotating plate 35, and the second driver 36 is driven to be connected to the bottom side of the rotating plate 35. When adjusting the orientation of the detector 33, since one side of the rotating plate 35 is rotatably connected to the top of the vibrating frame 31, the second driver 36 pushes the rotating plate 35 to tilt the entire rotating plate 35. With this configuration, the tilt angle of the rotating plate 35 can be adjusted by the second driver 36 according to the different directions of the grains. The second driver 36 can push the rotating plate 35 to rotate at a preset calibration time, thereby reducing excessive operations and improving the simplicity of the overall process.

[0061] It should be noted that a hinge 351 is provided on one side of the rotating plate 35, so one side of the rotating plate 35 is rotatably connected to the top of the vibration frame 31 through the hinge 351.

[0062] Specifically, in some embodiments, the second driver 36 includes a push rod 361, a first motor 362, a first moving part 363, and a first lead screw 364; the first moving part 363 is threadedly connected to the first lead screw 364, one end of the push rod 361 is rotatably connected to the first moving part 363, and the other end of the push rod 361 is rotatably connected to the rotating plate 35; the output shaft of the first motor 362 is drivenly connected to one end of the first lead screw 364; when the first motor 362 drives the first lead screw 364 to rotate, the first moving part 363 moves along the axial direction of the first lead screw 364, so that the push rod 361 drives the rotating plate 35 to rotate.

[0063] Specifically, when the output shaft of the first motor 362 drives the first lead screw 364 to rotate circumferentially, the first moving part 363 moves axially along the first lead screw 364. Since one end of the push rod 361 can drive the other end of the push rod 361 to rise or fall when it moves along the moving direction of the first moving part 363, the other end of the push rod 361 can push or pull the orientation angle of the rotating plate 35, that is, adjust the orientation of the detector 33.

[0064] For example, when the output shaft of the first motor 362 drives the first lead screw 364 to rotate clockwise, the first moving part 363 moves along the direction of the detector 33. At this time, the push rod 361 pushes the rotating plate 35 to rotate vertically. Conversely, when the output shaft of the first motor 362 drives the first lead screw 364 to rotate counterclockwise, the first moving part 363 moves along the direction of the first motor 362. At this time, the push rod 361 pulls the rotating plate 35 to rotate horizontally. Therefore, the orientation of the detector 33 can be adjusted according to actual needs.

[0065] It is understood that the first moving part 363 in this embodiment of the invention is the first nut. The specific operating principle is that when the first lead screw 364 is rotating, the height difference of the thread pattern on the first lead screw 364 and the first nut cooperate to generate a helical torque, so that the first nut can move linearly along the axial direction of the first lead screw 364.

[0066] According to the appendix Figure 2 As shown, in a specific embodiment, the movable frame 32 includes a base plate 322 and a plurality of connecting columns 321 disposed on the top of the base plate 322; wherein, a plurality of elastic members 34 are provided, at least one elastic member 34 having both ends connected to the bottom of the base plate 322 and the bottom of the vibration frame 31 respectively, and the other elastic members 34 having the same end connected to the vibration frame 31, and the other end connected to each connecting column 321 respectively.

[0067] Specifically, when some grains collide with the detector 33, the entire vibration table vibrates under the squeezing or pushing action of multiple elastic elements 34. The vibration amplitude is then detected by the detector 33. Thus, the vibration frame 31 can achieve irregular vibration, thereby improving the realism of the simulated combine harvester in operation.

[0068] For example, when some grains are thrown out, the vibrating frame 31 is pressed downwards, and the elastic element 34 at the bottom of the vibrating frame 31 is pressed, which pushes the entire vibrating frame 31 to vibrate repeatedly from top to bottom. The vibration amplitude is then detected by the detector 33.

[0069] For example, four connecting posts 321 are arranged in an array, and the two ends of multiple elastic elements 34 are respectively connected to the vibrating frame 31 and each connecting post 321. When some grains are thrown out, the vibrating frame 31 is pushed laterally, and the elastic elements 34 between the vibrating frame 31 and each connecting post 321 are squeezed, causing the entire vibrating frame 31 to vibrate laterally repeatedly. The vibration amplitude is then detected by the detector 33.

[0070] To simulate the different grain loss conditions caused by different types of combine harvesters, in one specific embodiment, the detection device further includes a third drive 4, which is driven by the movable frame 32 to move the movable frame 32. Specifically, the third drive 4 moves the movable frame 32 laterally, that is, moves the detector 33 to different detection positions to adjust the detector 33 to be in the optimal detection position, thereby simulating the different grain loss conditions caused by different types of combine harvesters.

[0071] According to the appendix Figure 4 As shown, specifically, the third drive 4 includes a second motor 41, a second lead screw, and a second moving part 43; the movable frame 32 is disposed on the second moving part 43, the second moving part 43 is threadedly connected to the second lead screw, and the output shaft of the second motor 41 is drivenly connected to one end of the second lead screw; when the first motor 362 drives the second lead screw to rotate circumferentially, the second moving part 43 moves axially along the second lead screw to drive the movable frame 32 to move.

[0072] Specifically, when the output shaft of the second motor 41 drives the second lead screw to rotate circumferentially, the second moving part 43 can move axially along the second lead screw to drive the movable frame 32 to move, thereby adjusting the detector 33 to different detection positions.

[0073] For example, when the output shaft of the second motor 41 drives the second lead screw to rotate in a clockwise or counterclockwise direction, the second moving part 43 moves along the length of the second lead screw, thereby driving the movable frame 32 to move.

[0074] It is understood that the second moving part 43 in this embodiment of the invention is also a nut. The specific operating principle is that when the second lead screw is rotating, the height difference of the thread on the second lead screw and the second nut cooperate to generate a helical torque, so that the second nut moves linearly along the axial direction of the second lead screw.

[0075] In a further embodiment, two second actuators 36 are provided. Specifically, the second lead screw of the first second actuator 36 (hereinafter referred to as second lead screw a42a) is perpendicular to the second lead screw of the second second actuator 36 (hereinafter referred to as second lead screw b42b). Therefore, it can be understood that the second lead screw a42a ​​extends along the X-axis direction, the second lead screw b42b extends along the Y-axis direction, and the second lead screw b42b is located on the top of the second moving part 43 of the first second actuator 36. With this configuration, by moving the two second moving parts 43 along the axial direction of the second lead screw a42a ​​and the second lead screw b42b respectively, the movable frame 32 can be moved to different positions so that the detector 33 can be located in the optimal detection position.

[0076] In order to fix the outer material trays 22 with different outer diameters; for this purpose, according to the attached... Figure 1 As shown, in a specific embodiment, the detection device further includes at least two clamping components 5 for clamping the outer material tray 22. Specifically, each clamping component 5 includes a clamping part and a cylinder, with the output shaft of the cylinder connected to the clamping part. When replacing the outer material tray 22, the output shaft of each cylinder pulls each clamping part to move in a direction away from each other to release the outer material tray 22; when assembling the outer material tray 22, the output shaft of each cylinder pushes each clamping part to move in a direction closer to each other until it can be fixedly clamped to the outer material tray 22; thereby improving the stability of the outer material tray 22 and preventing the outer material tray 22 from falling off when the inner material tray 21 rotates rapidly.

[0077] Furthermore, each clamping part is formed with an arc-shaped surface for fitting against the outer side wall of the outer material tray 22, so as to increase the contact area between each clamping part and the outer material tray 22 and further improve the stability of the outer material tray 22.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for detecting grain loss, characterized in that, The detection device includes: Mounting rack; A material-throwing assembly includes an inner material tray, an outer material tray, and a first driver connected to the inner material tray. The outer material tray is fixedly mounted on the mounting frame, and the inner material tray is rotatably mounted inside the outer material tray. A first discharge port is formed through the side wall of the outer material tray. The inner material tray is hollow and forms a receiving cavity for accommodating grains. A second discharge port communicating with the receiving cavity is formed through the side wall of the inner material tray. When the first driver drives the inner material tray to rotate circumferentially until the second discharge port communicates with the first discharge port, the grains are thrown out. The detection assembly includes a vibrating frame, a movable frame, a detector, and multiple elastic elements. The movable frame is mounted on the mounting frame. One end of each elastic element is connected to the vibrating frame, and the other end is connected to the movable frame. The detector is located on the top of the vibrating frame and is used to detect the amount of grain loss after it is thrown out. The movable frame includes a base plate and a plurality of connecting columns disposed on the top of the base plate; The elastic element is provided in multiple ways. At least one elastic element has its two ends connected to the bottom of the base plate and the bottom of the vibration frame, respectively. The other elastic elements have the same end connected to the vibration frame and the other end connected to each of the connecting columns. The detection assembly further includes a rotating plate and a second driver; the detector is disposed on the rotating plate, one side of the rotating plate is rotatably connected to the top of the vibration frame, and the second driver is drivenly connected to the rotating plate; when the second driver drives the rotating plate to rotate, the orientation of the detector is adjusted. The entire vibrating frame is supported by multiple elastic elements. When the thrown grain collides with the detector, the entire vibrating frame generates small-amplitude and irregular vibrations. That is, the vibrating frame is pushed or pulled by multiple elastic elements to achieve omnidirectional vibration. Then, the detector performs calculations based on the vibration amplitude of the vibrating frame to obtain the amount of grain loss.

2. The grain loss detection device according to claim 1, characterized in that, The material throwing assembly further includes an adjustment part, which is movably disposed in the first discharge port; when the adjustment part moves along the length of the first discharge port, it increases or decreases the outer diameter of the first discharge port.

3. The grain loss detection device according to claim 2, characterized in that, The inner material tray has a feeding section that communicates with the accommodating cavity.

4. The grain loss detection device according to claim 1, characterized in that, The second driver includes a push rod, a first motor, a first moving part, and a first lead screw; the first moving part is threadedly connected to the first lead screw, one end of the push rod is rotatably connected to the first moving part, and the other end of the push rod is rotatably connected to the rotating plate; the output shaft of the first motor is connected to one end of the first lead screw; when the first motor drives the first lead screw to rotate circumferentially, the first moving part moves axially along the first lead screw, so that the push rod drives the rotating plate to rotate.

5. The grain loss detection device according to claim 1, characterized in that, It also includes a third driver, which is connected to the movable frame and is used to move the movable frame.

6. The grain loss detection device according to claim 5, characterized in that, The third driver includes a second motor, a second lead screw, and a second moving part; the movable frame is disposed on the second moving part, the second moving part is threadedly connected to the second lead screw, and the output shaft of the second motor is drivenly connected to one end of the second lead screw; when the second motor drives the second lead screw to rotate, the second moving part moves along the axial direction of the second lead screw to drive the movable frame to move.

7. The grain loss detection device according to claim 6, characterized in that, There are two second drivers, with the second lead screw of the first second driver and the second lead screw of the second second driver being arranged perpendicularly to each other.

8. The grain loss detection device according to claim 1, characterized in that, It also includes at least two clamping components for clamping the outer tray.

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