Yield measuring device for rice breeding

Abstract

The invention provides a yield measuring device for rice breeding, which relates to the technical field of yield measurement and comprises a first support, a winnowing machine is arranged at the upper end of the first support, a first discharge pipe and a second discharge pipe are arranged on the surface of the winnowing machine, a yield detection structure is fixedly mounted at the tail end of the first discharge pipe, and the yield detection structure comprises a first elbow discharge pipe. By arranging a yield detection structure, the winnowing machine can screen full and empty unhusked rice through a winnowing function, so that the full unhusked rice is discharged into a first measuring cup through a first discharging pipe, a first bent pipe discharging pipe and a first concentration funnel; empty unhulled rice can enter a second measuring cup through a second discharging pipe, a second bent pipe discharging pipe and a second concentrated funnel, and at the moment, the net weight content of the unhulled rice in the first measuring cup and the net weight content of the unhulled rice in the second measuring cup can be displayed on a first electronic scale and a second electronic scale; further, the proportion of empty and shriveled rice grains and full rice grains in the batch of rice grains can be obtained, and subsequent detection is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of yield measurement, and more specifically, particularly relates to a yield measurement device for rice breeding. Background Art

[0002] The yield measurement device for rice breeding is an important tool for evaluating the yield potential of rice. By accurately measuring the yield-related indicators of plots or individual plants, it provides a scientific basis for variety selection.

[0003] Currently, an existing device (such as publication number: CN113188946B) discloses a "grain quality monitoring device and monitoring method with grain density measurement function". This device has a grain density measurement function, continuously corrects the grain density and grain volume compensation parameters through the density measurement device, effectively improves the measurement accuracy, realizes the accurate optoelectronic measurement of the volume of non-uniformly distributed grains and the real-time dynamic monitoring of grain quality. The present invention can measure the volume of grains in real time online and calculate the real-time yield of grains in the operation plot, providing a theoretical basis for subsequent field fertility analysis in precision agriculture, and further for variable seeding, fertilization, and spraying. However, during the implementation of the above technical solution, it is found that at least the following technical problems exist: when the device measures, it directly measures the volume and density of the mixture using photoelectric sensors and weighing sensors, and lacks detection of paddy grains with significant differences in internal grain plumpness, such as empty and shrunken grains, which has certain limitations. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a yield measurement device for rice breeding to solve the above problems.

[0005] A yield measurement device for rice breeding includes a first support. A control screen is provided on the surface of the first support. An air separator is provided at the upper end of the first support. A first discharge pipe and a second discharge pipe are respectively provided on the surface of the air separator. A yield detection structure is fixedly installed at the end of the first discharge pipe. The yield detection structure includes a first bent discharge pipe. A second bent discharge pipe is fixedly installed at the end of the second discharge pipe. A first centralized funnel is fixedly installed outside the first bent discharge pipe. A second centralized funnel is fixedly installed outside the second bent discharge pipe. A second support is fixedly installed on the surface of the first support. A U-shaped hydraulic pipe is fixedly installed inside the second support. A first end pipe and a second end pipe are respectively provided at both ends of the U-shaped hydraulic pipe. The diameter of the first end pipe is larger than that of the second end pipe.

[0006] Preferably, a first sealing ring is slidably installed inside the first end pipe. A first piston rod is fixedly installed at the upper end of the first sealing ring. A part of the first piston rod is exposed outside the first end pipe. The first piston rod is slidably installed with the first end pipe. A second sealing ring is slidably installed inside the second end pipe. A second piston rod is fixedly installed at the upper end of the second sealing ring. A part of the second piston rod is exposed outside the second end pipe. The second piston rod is slidably installed with the second end pipe.

[0007] Preferably, a first fixing plate is fixedly installed at the upper end of the first piston rod. A second fixing plate is fixedly installed at the upper end of the second piston rod. Distance sensors are symmetrically and fixedly installed at the upper end of the second bracket. Both of the two distance sensors are located below the first fixing plate and the second fixing plate.

[0008] Preferably, a first electronic scale is fixedly installed at the upper end of the first fixing plate. A second electronic scale is fixedly installed at the upper end of the second fixing plate.

[0009] Preferably, a first rotating disk is rotatably installed at the upper end of the tray of the first electronic scale. A second rotating disk is rotatably installed at the upper end of the tray of the second electronic scale. Wind wheels are arranged on the circumferential surfaces of the first rotating disk and the second rotating disk. A first rectangular groove is formed inside the first rotating disk. A second rectangular groove is formed inside the second rotating disk. A first measuring cup is arranged inside the first rectangular groove. A second measuring cup is arranged inside the second rotating disk.

[0010] Preferably, a first red mark and a first green mark are respectively arranged on the circumferential surface of the first piston rod. The first red mark is located below the first green mark. A second green mark and a second red mark are respectively arranged on the circumferential surface of the second piston rod. The second green mark is located below the second red mark.

[0011] Preferably, air duct interfaces are symmetrically arranged on the surface of the winnower. Air outlet pipes are communicated inside both of the two air duct interfaces. Three-way air pipes are communicated on the side walls of both of the two air outlet pipes. Both of the two three-way air pipes are located above the wind wheels.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by setting the yield detection structure, the winnower can screen plump and relatively shriveled paddy through the winnowing function, so that the plump paddy enters the first measuring cup through the first discharge pipe, the first elbow discharge pipe and the first centralized funnel, while the relatively shriveled paddy will enter the second measuring cup through the second discharge pipe, the second elbow discharge pipe and the second centralized funnel. At this time, the paddy in the first measuring cup and the second measuring cup will show the net weight content on the first electronic scale and the second electronic scale, and then the ratio of shriveled grains and plump grains of this batch of paddy can be obtained, which is convenient for subsequent detection; In the present invention, by providing the first piston rod and the second piston rod, if the weight of the first measuring cup is relatively heavy, a radial force will be generated on the first piston rod through the first electronic scale and the first fixing plate, causing the first piston rod to drive the first sealing ring to move downward inside the first end pipe. At the same time, the movement of the first sealing ring will squeeze the hydraulic oil between the first sealing ring and the second sealing ring, causing the second piston rod to drive the second fixing plate, the second electronic scale, and the second measuring cup to rise. Furthermore, the difference between empty and shriveled grains of paddy and plump grains of paddy can be intuitively known through the hydraulic principle; In the present invention, since the diameter of the first end pipe is larger than that of the second end pipe, when the first piston rod is pressed down, the first red mark on the surface of the first piston rod will be inside the first end pipe, and a small part of the first green mark will be exposed above the first end pipe. At the same time, the second piston rod will move upward inside the second end pipe. And because the diameter of the second end pipe is smaller than that of the first end pipe, the rising amplitude of the second piston rod is more obvious compared to the case where the second end pipe and the first end pipe have the same dimensions, which further facilitates the comparison by the staff of the differences between empty and shriveled grains of paddy and plump grains of paddy; In the present invention, when the air separator is started, part of the wind force will be transmitted to the second end pipe through the air outlet pipe, causing the three - headed air pipe to blow air on the wind wheels of the first rotating disk and the second rotating disk, causing the wind wheels to drive the first rotating disk and the second rotating disk to rotate on the first electronic scale and the second electronic scale, thereby generating a centrifugal force to shake the paddy in the first measuring cup and the second measuring cup evenly, and thus avoiding misjudgment by the first electronic scale and the second electronic scale; In the present invention, by providing the second green mark, the second red mark, when both the first green mark and the second green mark on the first piston rod and the second piston rod can be seen above the first end pipe and the second end pipe, it means that in a batch of paddy in the first measuring cup and the second measuring cup, the plumpness rate is relatively high and the yield quality is good. If both the first red mark and the second red mark on the first piston rod and the second piston rod can be seen above the first end pipe and the second end pipe, it means that in a batch of paddy in the first measuring cup and the second measuring cup, the empty and shriveled rate is relatively high and the yield quality is poor. Thus, the ratio of paddy in the first measuring cup and the second measuring cup can be further confirmed through the liquid height ratio, and furthermore, multiple quality detection methods can be provided, greatly improving the accuracy of the device for testing the quality of paddy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the three - dimensional structure schematic diagram of the present invention; Figure 2 is the three - dimensional connection explosion structure schematic diagram of the present invention; Figure 3 is the first concentrated funnel connection explosion structure schematic diagram of the present invention; Figure 4Schematic diagram of the second bracket connection explosion structure of the present invention; Figure 5 is the present invention Figure 4 Enlarged view of the structure at location A in; Figure 6 Schematic diagram of the U-shaped hydraulic pipe connection explosion structure of the present invention; Figure 7 Schematic diagram of the first electronic scale connection explosion structure of the present invention; Figure 8 Schematic diagram of the first fixed plate connection explosion structure of the present invention; Figure 9 Schematic diagram of the first piston rod connection explosion structure of the present invention.

[0014] In the figure, the corresponding relationship between the component names and the drawing reference numbers is as follows: 11, the first bracket; 12, the air separator; 13, the first discharge pipe; 14, the second discharge pipe; 15, the first elbow discharge pipe; 16, the second elbow discharge pipe; 17, the first centralized funnel; 18, the second centralized funnel; 19, the second bracket; 21, the U-shaped hydraulic pipe; 22, the first end pipe; 23, the second end pipe; 24, the first sealing ring; 25, the first piston rod; 26, the second sealing ring; 27, the second piston rod; 28, the first fixed plate; 29, the second fixed plate; 31, the first electronic scale; 32, the second electronic scale; 33, the first rotating disk; 34, the second rotating disk; 35, the wind wheel; 36, the first rectangular groove; 37, the second rectangular groove; 38, the first measuring cup; 39, the second measuring cup; 41, the first red mark; 42, the first green mark; 43, the second green mark; 44, the second red mark; 45, the air duct interface; 46, the air outlet pipe; 47, the three-way air duct; 48, the distance sensor; 49, the control panel. Detailed implementation manners

[0015] The following further describes in detail the implementation manners of the present invention with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0016] Please refer to Figures 1 - 9 , the present invention provides a yield measuring device for rice breeding, including a first bracket 11, on the surface of the first bracket 11 is provided a control panel 49, at the upper end of the first bracket 11 is provided an air separator 12, and on the surface of the air separator 12 are respectively provided a first discharge pipe 13 and a second discharge pipe 14; At the end of the first discharge pipe 13 is fixedly installed a yield detection structure; The yield detection structure includes a first elbow discharge pipe 15, at the end of the second discharge pipe 14 is fixedly installed a second elbow discharge pipe 16, on the outside of the first elbow discharge pipe 15 is fixedly installed a first centralized funnel 17, on the outside of the second elbow discharge pipe 16 is fixedly installed a second centralized funnel 18, and on the surface of the first bracket 11 is fixedly installed a second bracket 19; The winnowing machine 12 has classified paddy into two categories: plump grains (high density) and empty grains (low density) according to density differences. After separation, the densities of the two components tend to be uniform, and the mass difference is mainly determined by the number of particles. Therefore, the mass ratio data can be obtained from the masses of the empty grains and plump grains of the paddy to determine the yield quality. By setting up a yield detection structure, the winnowing machine 12 can screen out plump and relatively empty paddy through its winnowing function. The plump paddy will be discharged into the first measuring cup 38 through the first discharge pipe 13, the first elbow discharge pipe 15, and the first centralized funnel 17, while the relatively empty paddy will enter the second measuring cup 39 through the second discharge pipe 14, the second elbow discharge pipe 16, and the second centralized funnel 18. At this time, the net weight of the paddy in the first measuring cup 38 and the second measuring cup 39 will be displayed on the first electronic scale 31 and the second electronic scale 32, and then the ratio of the empty grains and plump grains of this batch of paddy can be obtained, which is convenient for subsequent detection.

[0017] A U-shaped hydraulic pipe 21 is fixedly installed inside the second support 19. The two ends of the U-shaped hydraulic pipe 21 are respectively provided with a first end pipe 22 and a second end pipe 23. The diameter of the first end pipe 22 is larger than that of the second end pipe 23. A first sealing ring 24 is slidably installed inside the first end pipe 22. The upper end of the first sealing ring 24 is fixedly installed with a first piston rod 25. A part of the first piston rod 25 is exposed outside the first end pipe 22, and the first piston rod 25 is slidably installed with the first end pipe 22. A second sealing ring 26 is slidably installed inside the second end pipe 23. The upper end of the second sealing ring 26 is fixedly installed with a second piston rod 27. A part of the second piston rod 27 is exposed outside the second end pipe 23, and the second piston rod 27 is slidably installed with the second end pipe 23. The upper end of the first piston rod 25 is fixedly installed with a first fixing plate 28, and the upper end of the second piston rod 27 is fixedly installed with a second fixing plate 29. Distance sensors 48 are symmetrically and fixedly installed at the upper end of the second support 19. Both of the two distance sensors 48 are located below the first fixing plate 28 and the second fixing plate 29. The first electronic scale 31 is fixedly installed at the upper end of the first fixing plate 28, and the second electronic scale 32 is fixedly installed at the upper end of the second fixing plate 29. By setting the first piston rod 25 and the second piston rod 27, if the weight of the first measuring cup 38 is heavier, a radial force will be generated on the first piston rod 25 through the first electronic scale 31 and the first fixing plate 28, causing the first piston rod 25 to drive the first sealing ring 24 to move downward inside the first end pipe 22. At the same time, the movement of the first sealing ring 24 will squeeze the hydraulic oil between the first sealing ring 24 and the second sealing ring 26, causing the second piston rod 27 to drive the second fixing plate 29, the second electronic scale 32, and the second measuring cup 39 to rise. Thus, the difference between the empty grains and plump grains of the paddy can be intuitively known through the hydraulic principle. Since the diameter of the first end pipe 22 is larger than that of the second end pipe 23, when the first piston rod 25 is pressed down, the first red mark 41 on the surface of the first piston rod 25 will be located inside the first end pipe 22, and a smaller part of the first green mark 42 will be exposed above the first end pipe 22. At the same time, the second piston rod 27 will move upward inside the second end pipe 23. And because the diameter of the second end pipe 23 is smaller than that of the first end pipe 22, the rising amplitude of the second piston rod 27 is more obvious compared to the condition where the second end pipe 23 and the first end pipe 22 have the same size, which further facilitates the staff to compare the differences between shriveled grains of paddy and plump grains of paddy.

[0018] A first rotating disk 33 is rotatably installed at the upper end of the tray of the first electronic scale 31, and a second rotating disk 34 is rotatably installed at the upper end of the tray of the second electronic scale 32. Wind wheels 35 are provided on the circumferential surfaces of the first rotating disk 33 and the second rotating disk 34. A first rectangular groove 36 is formed inside the first rotating disk 33, and a second rectangular groove 37 is formed inside the second rotating disk 34. A first measuring cup 38 is provided inside the first rectangular groove 36, and a second measuring cup 39 is provided inside the second rotating disk 34; When the winnowing machine 12 is started, part of the wind force will be transmitted to the second end pipe 23 through the air outlet pipe 46 at this time, so that the three - headed air pipe 47 blows the wind wheels 35 of the first rotating disk 33 and the second rotating disk 34, causing the wind wheels 35 to drive the first rotating disk 33 and the second rotating disk 34 to rotate on the first electronic scale 31 and the second electronic scale 32, thereby generating a centrifugal force, making the paddy in the first measuring cup 38 and the second measuring cup 39 shaken evenly, and thus avoiding misjudgment of the first electronic scale 31 and the second electronic scale 32.

[0019] A first red mark 41 and a first green mark 42 are respectively provided on the circumferential surface of the first piston rod 25, and the first red mark 41 is located below the first green mark 42. A second green mark 43 and a second red mark 44 are respectively provided on the circumferential surface of the second piston rod 27, and the second green mark 43 is located below the second red mark 44; In the sealed liquid in the U - shaped hydraulic pipe 21, the pressure is equal everywhere. Therefore, the mass ratio of the paddy in the first measuring cup 38 and the second measuring cup 39 can be further determined by the hydraulic principle through the mass difference and the height difference of the hydraulic transmission of the first piston rod 25 and the second piston rod 27; By setting the second green label 43, the second red label 44, the second green label 43 and the second red label 44, when both the first green label 42 on the first piston rod 25 and the second green label 43 on the second piston rod 27 can be seen above the first end pipe 22 and the second end pipe 23, it means that in a batch of paddy rice in the first measuring cup 38 and the second measuring cup 39, the plumpness rate is relatively high and the yield quality is good. If both the first red label 41 and the second red label 44 on the first piston rod 25 and the second piston rod 27 can be seen above the first end pipe 22 and the second end pipe 23, it means that in a batch of paddy rice in the first measuring cup 38 and the second measuring cup 39, the rate of empty and shrivelled grains is relatively high and the yield quality is poor. Thus, the ratio of paddy rice in the first measuring cup 38 and the second measuring cup 39 can be further confirmed by the liquid height ratio, and furthermore, multiple quality inspection methods can be provided, greatly improving the accuracy of the device for testing the quality of paddy rice.

[0020] Air ducts interfaces 45 are symmetrically arranged on the surface of the winnower 12. The two air ducts interfaces 45 are internally connected with air outlet pipes 46. Three-way air ducts 47 are connected to the side walls of the two air outlet pipes 46. The two three-way air ducts 47 are both located above the wind wheel 35. By setting the three-way air ducts 47, the effect of the wind force on pushing the wind wheel 35 can be further improved, ensuring that the paddy rice in the first measuring cup 38 and the second measuring cup 39 is evenly shaken.

[0021] Working principle: First step, during use, the staff can randomly sample the paddy rice in the rice breeding area and divide it into five batches of samples at random for every one kilogram. Then the staff can respectively place the first measuring cup 38 and the second measuring cup 39 into the first rectangular groove 36 and the second rectangular groove 37, and zero the first electronic scale 31 and the second electronic scale 32. Subsequently, the staff can put a batch of paddy rice into the feeding port of the winnower 12 and turn on the winnower 12. Since the collected paddy rice includes plump ones and relatively empty and shrivelled ones, at this time, the winnower 12 can screen the plump paddy rice and the relatively empty and shrivelled paddy rice through the winnowing function, so that the plump paddy rice is discharged into the first measuring cup 38 through the first discharge pipe 13, the first elbow discharge pipe 15 and the first centralized funnel 17, while the relatively empty and shrivelled paddy rice will enter the second measuring cup 39 through the second discharge pipe 14, the second elbow discharge pipe 16 and the second centralized funnel 18. At this time, the net weight content of the paddy rice in the first measuring cup 38 and the second measuring cup 39 will be displayed on the first electronic scale 31 and the second electronic scale 32, and thus the ratio of the empty and shrivelled grains and the plump grains of this batch of paddy rice can be obtained. In the second step, when the air separator 12 is started, part of the wind force will be transmitted to the second end pipe 23 through the air outlet pipe 46 at this time, so that the three-head air pipe 47 blows air on the wind wheels 35 of the first rotating disk 33 and the second rotating disk 34, causing the wind wheels 35 to drive the first rotating disk 33 and the second rotating disk 34 to rotate on the first electronic scale 31 and the second electronic scale 32, thereby generating a centrifugal force, making the paddy rice entering the first measuring cup 38 and the second measuring cup 39 shaken evenly, thus avoiding misjudgment of the first electronic scale 31 and the second electronic scale 32, ensuring the accurate ratio of empty and shriveled paddy rice and plump paddy rice. Subsequently, the staff can turn off the air separator 12; In the third step, if the weight of the first measuring cup 38 is heavier at this time, a radial force will be generated on the first piston rod 25 through the first electronic scale 31 and the first fixing plate 28, causing the first piston rod 25 to drive the first sealing ring 24 to move downward inside the first end pipe 22. At the same time, the movement of the first sealing ring 24 will squeeze the hydraulic oil between the first sealing ring 24 and the second sealing ring 26, causing the second piston rod 27 to drive the second fixing plate 29, the second electronic scale 32 and the second measuring cup 39 to rise; In the fourth step, when the first piston rod 25 is pressed down, the first red mark 41 on the surface of the first piston rod 25 will be inside the first end pipe 22, and a smaller part of the first green mark 42 will be exposed above the first end pipe 22. At the same time, the second piston rod 27 will move upward inside the second end pipe 23. And because the diameter of the second end pipe 23 is smaller than that of the first end pipe 22, the rising amplitude of the second piston rod 27 is more obvious than that under the condition of the same size of the second end pipe 23 and the first end pipe 22. The whole of the second red mark 44 on the second piston rod 27 will be exposed outside the second end pipe 23, and part of the second green mark 43 on the second piston rod 27 will be partially exposed outside the second end pipe 23. Therefore, both the first green mark 42 and the second green mark 43 on the first piston rod 25 and the second piston rod 27 can be seen above the first end pipe 22 and the second end pipe 23, indicating that the plumpness rate is relatively high and the yield quality is good in a batch of paddy rice in the first measuring cup 38 and the second measuring cup 39; Step 5: When the empty and shriveled grains of paddy in the second measuring cup 39 are heavier, the second piston rod 27 will drive the second sealing ring 26 to move downward inside the second end tube 23, squeezing the hydraulic oil to push up the first sealing ring 24 and the first piston rod 25 inside the first end tube 22. At this time, the second green mark 43 on the second piston rod 27 will completely enter the second end tube 23, and the exposed range of the second red mark 44 outside the second end tube 23 is smaller. At the same time, the first green mark 42 on the first piston rod 25 will be completely exposed outside the first end tube 22, and part of the first red mark 41 will be exposed outside the first end tube 22. Therefore, both the first red mark 41 on the first piston rod 25 and the second red mark 44 on the second piston rod 27 can be seen above the first end tube 22 and the second end tube 23, indicating that the empty and shriveled rate of a batch of paddy in the first measuring cup 38 and the second measuring cup 39 is relatively high, and the yield quality is poor. Step 6: When the first electronic scale 31 and the second electronic scale 32 move, the distance sensor 48 will synchronously detect the lifting range of the first fixed plate 28 and the second fixed plate 29 and display the data on the control screen 49 for the staff to further visually confirm. Step 7: After the confirmation of this batch is completed, the staff can take out new first measuring cup 38 and second measuring cup 39 and zero them again, repeating the above steps until the detection of five batches of paddy is completed.

[0022] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A yield measuring device for rice breeding, characterized in that: It includes a first bracket (11) with a control screen (49) provided on the surface thereof. At the upper end of the first bracket (11), an air separator (12) is provided, and a first discharge pipe (13) and a second discharge pipe (14) are respectively provided on the surface of the air separator (12). A yield detection structure is fixedly installed at the end of the first discharge pipe (13). The yield detection structure includes a first elbow discharge pipe (15). A second elbow discharge pipe (16) is fixedly installed at the end of the second discharge pipe (14). A first concentrated funnel (17) is fixedly installed outside the first elbow discharge pipe (15), and a second concentrated funnel (18) is fixedly installed outside the second elbow discharge pipe (16). A second bracket (19) is fixedly installed on the surface of the first bracket (11), and a U-shaped hydraulic pipe (21) is fixedly installed inside the second bracket (19). A first end pipe (22) and a second end pipe (23) are respectively provided at both ends of the U-shaped hydraulic pipe (21), and the diameter of the first end pipe (22) is larger than that of the second end pipe (23).

2. The yield measuring device for rice breeding according to claim 1, wherein, A first sealing ring (24) is slidably installed inside the first end pipe (22). A first piston rod (25) is fixedly installed at the upper end of the first sealing ring (24). Part of the first piston rod (25) is exposed outside the first end pipe (22), and the first piston rod (25) is slidably installed with the first end pipe (22).

3. The yield measurement device for rice breeding according to claim 2, wherein A second sealing ring (26) is slidably installed inside the second end pipe (23). A second piston rod (27) is fixedly installed at the upper end of the second sealing ring (26). Part of the second piston rod (27) is exposed outside the second end pipe (23), and the second piston rod (27) is slidably installed with the second end pipe (23).

4. The yield measuring device for rice breeding according to claim 3, wherein, A first fixing plate (28) is fixedly installed at the upper end of the first piston rod (25), and a second fixing plate (29) is fixedly installed at the upper end of the second piston rod (27). Distance sensors (48) are symmetrically and fixedly installed at the upper end of the second bracket (19), and both of the two distance sensors (48) are located below the first fixing plate (28) and the second fixing plate (29).

5. The yield measuring device for rice breeding according to claim 4, characterized in that, A first electronic scale (31) is fixedly installed at the upper end of the first fixing plate (28), and a second electronic scale (32) is fixedly installed at the upper end of the second fixing plate (29).

6. The yield measuring device for rice breeding according to claim 5, wherein, A first rotating disk (33) is rotatably installed at the upper end of the tray of the first electronic scale (31), and a second rotating disk (34) is rotatably installed at the upper end of the tray of the second electronic scale (32).

7. The yield measuring device for rice breeding according to claim 6, characterized in that, Wind wheels (35) are provided on the circumferential surfaces of the first rotating disk (33) and the second rotating disk (34). A first rectangular groove (36) is formed inside the first rotating disk (33), and a second rectangular groove (37) is formed inside the second rotating disk (34). A first measuring cup (38) is provided inside the first rectangular groove (36), and a second measuring cup (39) is provided inside the second rotating disk (34).

8. The yield measuring device for rice breeding according to claim 3, wherein, The circumferential surface of the first piston rod (25) is respectively provided with a first red mark (41) and a first green mark (42), the first red mark (41) is located below the first green mark (42), the circumferential surface of the second piston rod (27) is respectively provided with a second green mark (43) and a second red mark (44), and the second green mark (43) is located below the second red mark (44).

9. The yield measuring device for rice breeding according to claim 6, wherein, Air duct interfaces (45) are symmetrically arranged on the surface of the air classifier (12), and air outlet pipes (46) are communicated inside both of the two air duct interfaces (45).

10. The yield measuring device for rice breeding according to claim 9, characterized in that, Three-way air pipes (47) are communicated on the side walls of both of the two air outlet pipes (46), and both of the two three-way air pipes (47) are located above the wind wheel (35).

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