Rotary laser radar for granary unprocessed grain detection

Abstract

The invention discloses a rotary laser radar for granary raw grain detection, and belongs to the technical field of granary detection laser radars, the rotary laser radar comprises an upper ring frame and a lower ring frame, the middle part of the upper ring frame is provided with a rotating shaft seat, a rotating rod is installed on the rotating shaft seat, and a radar ranging mechanism and an ash cleaning mechanism are slidably arranged on the rotating rod; the dust cleaning mechanism is used for cleaning floating dust on the radar ranging mechanism, and the dust cleaning start-stop control mechanism is used for controlling on-off of a circuit of the dust cleaning mechanism. According to the technical scheme, a rotating rod can periodically move along an upper ring frame in an hour hand rotation mode, a radar ranging mechanism is driven to periodically rotate above a granary, and it is ensured that the radar ranging mechanism can detect almost all positions in the granary; only when the radar ranging mechanism approaches, floating ash on the lens is cleaned, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of lidar technology for grain storage inspection, specifically a rotating lidar for detecting raw grain in grain storage. Background Technology

[0002] Grain silo detection lidar is a high-tech device that uses laser technology to measure and monitor the internal conditions of grain silos. Without contacting the grain, it accurately measures key parameters such as grain stack height, volume, temperature, and humidity through the emission and reception of laser beams, providing timely and accurate data support for grain silo managers. LiDAR can quickly scan grain piles and calculate the stack height and volume by measuring the time it takes for the laser beam to return, thus accurately determining the quantity of grain in the silo. Some advanced lidar systems can also integrate temperature and humidity sensors to monitor the temperature and humidity inside the grain silo in real time, ensuring the grain storage environment is at its optimal condition.

[0003] Utility model patent CN207963766U discloses a grain warehouse quantity monitoring device. Its structure includes a fixed base, connecting rod, bracket, infrared high-definition camera, and electro-hydraulic actuator. The infrared high-definition camera has a built-in laser rangefinder sensor. During monitoring, the electro-hydraulic actuator extends and retracts, causing the bracket to swing left and right. The infrared high-definition camera moves left and right under the swing of the bracket. The motor drives the gear shaft to make the infrared high-definition camera tilt. Under the control of a remote computer, the laser rangefinder sensor swings left and right and tilts. The laser rangefinder sensor measures the distance to the upper surface of the grain warehouse row by row. The remote computer calculates the three-dimensional coordinates of each monitoring point based on the measured distance and the angles of the left and right and tilt swings.

[0004] While the aforementioned device enables the laser rangefinder sensor to swing left and right and tilt under the drive of the relevant structure, its coverage area is very limited, making it difficult to comprehensively measure the grain inventory in all parts of the entire grain warehouse. Furthermore, the frequent changes in the angle during the swing of the laser rangefinder sensor complicate the design of the algorithm program. In addition, due to the high dust content in the grain warehouse and the electrostatic adsorption of electronic equipment, dust easily adheres to the lens of the infrared high-definition camera, affecting its performance. Therefore, to address the above problems, a rotating lidar for detecting raw grain in grain warehouses is proposed. Summary of the Invention

[0005] The technical problem this invention aims to solve is to provide a rotating lidar for detecting raw grain in grain silos. This lidar features a rotating rod that rotates periodically clockwise along an upper ring frame, thereby driving a radar ranging mechanism mounted on it to rotate periodically above the grain silo. This ensures that the radar ranging mechanism can detect almost all locations within the grain silo. Furthermore, because the working direction of the radar ranging mechanism is always perpendicular to the ground and its height is fixed, there are almost no changes in angle or height. Therefore, the design of the relevant algorithms is relatively simple, and the data is more accurate. In addition, the included dust removal mechanism can clean the radar ranging... The dust removal mechanism cleans the surface dust from the lens to prevent it from affecting normal operation. In particular, the dust removal mechanism is normally in standby mode and only becomes active when the rotating rod moves the radar ranging mechanism to approach and trigger the nearby dust removal start / stop control mechanism. This has an energy-saving effect and solves the technical problems of the limited coverage of existing lidar, which makes it difficult to comprehensively measure the grain inventory in all parts of the grain warehouse. It also addresses the issues of the frequent changes in the angle of the laser ranging sensor during its swing, which makes the algorithm program design more complex, and the problem of surface dust easily adhering to the lens of the infrared high-definition camera, affecting its performance.

[0006] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0007] A rotating lidar for detecting raw grain in a grain warehouse includes an upper ring frame and a lower ring frame. The upper ring frame has a rotating shaft seat in the middle, and the lower ring frame has a fixed rod and a rotating rod mounted on the rotating shaft seat. A radar ranging mechanism and a dust removal mechanism are slidably mounted on the rotating rod to clean the floating dust on the radar ranging mechanism. A dust removal start / stop control mechanism is used to control the start and stop of the dust removal mechanism. A connecting block is fixedly connected to the end of the rotating rod, and a pressure plate is provided at the outer end of the connecting block to contact the dust removal start / stop control mechanism when rotating.

[0008] With the above-described structure, the rotating rod can rotate periodically clockwise along the upper ring frame, thereby driving the radar ranging mechanism mounted on it to rotate periodically above the grain silo, ensuring that the radar ranging mechanism can detect almost all positions within the grain silo. Furthermore, since the working direction of the radar ranging mechanism is always perpendicular to the ground and its height is fixed, there are almost no changes in angle or height, thus simplifying the design of the relevant algorithms and ensuring more accurate data. In addition, the included dust-cleaning mechanism can clean the dust from the radar ranging mechanism's lens, preventing dust from affecting its normal operation. Notably, the dust-cleaning mechanism is normally in standby mode, only activating when the rotating rod moves the radar ranging mechanism close to and triggers the nearby dust-cleaning start / stop control mechanism, thus saving energy.

[0009] In one possible implementation, the dust removal start / stop control mechanism includes a C-shaped groove plate and an L-shaped groove plate fixedly connected below it. The L-shaped groove plate is fixedly connected to the lower ring frame by an inclined support plate. Several sliding shafts are slidably provided on the C-shaped groove plate. The upper and lower ends of the sliding shafts are respectively fixedly connected to a pressure plate and a moving contact plate. In addition, a stationary contact plate is provided at the bottom of the L-shaped groove plate.

[0010] With the above structure, when the rotating rod rotates and moves the pressure plate, the pressure plate will squeeze the pressure plate downward, so that the moving contact plate contacts the stationary contact plate, which will connect the working circuit of the dust removal mechanism.

[0011] In one possible implementation, the sliding shaft is fitted with a return spring located between the pressure plate and the C-shaped groove plate, and the bottom of the sliding shaft is fixedly fitted with an anti-detachment disc located on the lower side of the C-shaped groove plate.

[0012] With the above structure, when the rotating rod rotates and causes the pressure plate to separate from the pressure plate, the return spring can push the pressure plate upward, so that the moving contact and the stationary contact separate from each other, thereby cutting off the working circuit of the dust removal mechanism and stopping its operation.

[0013] In one possible implementation, the dust removal mechanism includes a movable mounting platform slidably mounted on a fixed rod, a centrally arranged disc motor mounted on the movable mounting platform, and a brush disc with flexible bristles on its upper end face fixedly connected to the output shaft of the disc motor.

[0014] With the above-described structure, a disc motor can drive a brush disc with flexible bristles to rotate, which cleans the lens of the radar ranging mechanism and ensures that the radar ranging mechanism can work normally.

[0015] In one possible implementation, both the moving contact and the stationary contact are electrically connected to a continuity line. The continuity line on the stationary contact is electrically connected to the positive terminal of the disc motor, and the continuity line on the moving contact is electrically connected to the positive terminal of an external power supply. The negative terminal of the disc motor is electrically connected to the negative terminal of the external power supply via a wire.

[0016] With the above structure, when the moving contact and the stationary contact come into contact, the working circuit of the disc motor is turned on. At this time, the disc motor drives the brush disk with flexible bristles to rotate and perform cleaning work. When the moving contact and the stationary contact separate, the working circuit of the disc motor is cut off and it stops working, which saves energy and avoids it from working continuously and wasting energy.

[0017] In one possible implementation, the radar ranging mechanism includes a sliding frame slidably sleeved on a rotating rod, a radar ranging camera fixedly mounted on the lower end face of the sliding frame, and a transparent cover provided for the lens cover of the radar ranging camera. In addition, a locking bolt is threaded onto the sliding frame, and a battery compartment electrically connected to the radar ranging camera is installed on the lower end face of the sliding frame. The battery compartment contains a battery pack for powering the operation of the radar ranging camera.

[0018] With the above-described structure, the working radius of the radar ranging camera can be changed by sliding the sliding frame, which makes it easy to adjust the working radius according to specific conditions and achieve better detection results. After adjustment, its position can be fixed by tightening the locking bolts. At the same time, the battery block can provide power to the radar ranging camera and its continuous movement will not be affected by the laying of lines.

[0019] In one possible implementation, the rotating shaft seat includes mounting cylinders fixedly disposed on the upper and lower sides of the middle part of the upper ring frame, and each mounting cylinder is equipped with a fixed bearing. The mounting cylinder is provided with a rotating central shaft, and the central shaft is fixedly connected to the inner ring of the fixed bearing. The bottom of the central shaft is fitted with a fixedly connected mounting sleeve, and the end of the rotating rod is fixedly connected to the mounting sleeve.

[0020] With the above-described structure, the position of the rotating rod can be fixed with a fixed bearing, but at the same time, it will not hinder its free rotation. In addition, the fixed bearing and the mounting sleeve are used to share almost all the load, ensuring that the drive mechanism can have a good working condition.

[0021] In one possible implementation, the lower side of the upper ring frame is provided with an annular groove, the overlapping block is L-shaped, and its upper side overlaps in the annular groove.

[0022] The above-described structure allows the overlapping blocks to slide within the annular groove, effectively supporting the ends of the rotating rod and preventing it from becoming a cantilever structure due to a lack of end support, which would otherwise subject the rotating shaft to a large bending moment and affect its service life.

[0023] In one possible implementation, the upper ring frame is provided with a drive mechanism for driving the rotation of the central shaft. The drive mechanism includes a motor bracket on which a drive motor with an output shaft and a transmission connection to the central shaft is mounted.

[0024] With the above-described structure, the rotating shaft can be driven to rotate by the operation of the drive motor, which in turn drives the rotating rod to rotate.

[0025] In one possible implementation, the upper ring frame and the lower ring frame are fixedly connected by a connector, which includes a hinge seat provided on the side of the upper ring frame and the lower ring frame, and a diagonal brace is connected between the hinge seats of the two.

[0026] The above-described structure enables a fixed connection between the upper and lower ring frames, and provides the necessary structural foundation for replacing the lower ring frame with a matching size according to actual conditions.

[0027] In summary, the present invention has the following beneficial technical effects:

[0028] The rotating rod can move periodically along the upper ring frame in a clockwise direction, thereby driving the radar ranging mechanism installed on it to rotate periodically above the grain silo. This ensures that the radar ranging mechanism can detect almost all positions inside the grain silo. Furthermore, since the working direction of the radar ranging mechanism is always perpendicular to the ground and the height is fixed, there will be almost no change in angle and height. Therefore, the design of the relevant algorithm is relatively simple and the data is relatively accurate.

[0029] In addition, the cleaning mechanism can clean the dust on the radar ranging mechanism lens, preventing dust from affecting its normal operation. In particular, the cleaning mechanism is normally in standby mode and only starts working when the rotating rod moves the radar ranging mechanism close to and triggers the nearby cleaning start / stop control mechanism, thus saving energy. Attached Figure Description

[0030] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0031] In the attached diagram:

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the upper structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the radar ranging mechanism of the present invention;

[0035] Figure 4 This is a schematic diagram of the dust removal start / stop control mechanism of the present invention;

[0036] Figure 5 This is a schematic diagram of the dust removal mechanism of the present invention;

[0037] Figure 6 This is a schematic diagram of the rotating shaft seat structure of the present invention;

[0038] Figure 7 This is a schematic diagram of the trigger state of the dust removal start / stop control mechanism of the present invention.

[0039] In the diagram: 1. Upper ring frame; 11. Annular groove; 2. Lower ring frame; 21. Fixing rod; 3. Rotating shaft seat; 31. Mounting cylinder; 32. Fixed bearing; 33. Central shaft; 34. Mounting sleeve; 4. Drive mechanism; 41. Motor bracket; 42. Drive motor; 5. Rotating rod; 51. Connecting block; 52. Pressure plate; 6. Radar ranging mechanism; 61. Sliding frame; 62. Radar ranging camera; 63. Transparent cover; 64. Battery compartment 65. Battery block; 66. Locking bolt; 7. Dust cleaning mechanism; 71. Movable mounting platform; 72. Disc motor; 73. Brush disc; 74. Brush bristles; 8. Dust cleaning start / stop control mechanism; 81. Inclined support plate; 82. C-shaped groove plate; 83. L-shaped groove plate; 84. Sliding shaft; 85. Pressure plate; 86. Moving contact plate; 87. Stationary contact plate; 88. Return spring; 89. Continuous / disconnecting wire; 9. Connecting parts; 91. Hinge seat; 92. Diagonal brace. Detailed Implementation

[0040] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0041] like Figure 1 - Figure 2 As shown in the figure, this embodiment provides a rotating lidar for detecting raw grain in a grain warehouse, including an upper ring frame 1 and a lower ring frame 2. The upper ring frame 1 has a rotating shaft seat 3 in the middle, and the lower ring frame 2 has a fixed rod 21 and a rotating rod 5, which is mounted on the rotating shaft seat 3. A radar ranging mechanism 6 is slidably mounted on the rotating rod 5. Through the above structure, the rotating rod 5 can move periodically along the upper ring frame 1 in a clockwise direction, thereby driving the radar ranging mechanism 6 mounted on it to rotate periodically above the grain warehouse, ensuring that the radar ranging mechanism 6 can detect almost all positions inside the grain warehouse. In the above process, since the working direction of the radar ranging mechanism 6 is always perpendicular to the ground and the height is fixed, there is almost no change in angle and height. Therefore, the design of the relevant algorithm is relatively simple and the data is relatively accurate.

[0042] Based on the above structural form, when grain is put into the grain silo from the top, the grain can fall smoothly through the gaps in both the upper ring frame 1 and the lower ring frame 2. The setting of the detection device will not interfere with the normal operation of this grain putting method. In order to reduce the adverse effects of the grain and the dust it carries on the device, it is best to pour the grain into the gaps away from the electrical components.

[0043] In addition, a dust removal mechanism 7 is slidably mounted on the fixed rod 21 to clean the floating dust on the radar ranging mechanism 6. A dust removal start / stop control mechanism 8 is used to control the on / off of the circuit of the dust removal mechanism 7. A connecting block 51 is fixedly connected to the end of the rotating rod 5. A pressure plate 52 is provided at the outer end of the connecting block 51 to trigger the dust removal start / stop control mechanism 8 when rotating. The dust removal mechanism 7 can clean the floating dust on the lens of the radar ranging mechanism 6 to prevent dust from affecting its normal operation. In particular, the dust removal mechanism 7 is normally in standby mode. It will only be in working mode when the rotating rod 5 moves the radar ranging mechanism 6 and approaches and triggers the nearby dust removal start / stop control mechanism 8, which has an energy-saving effect.

[0044] like Figure 4 As shown, the dust removal start / stop control mechanism 8 includes a C-shaped slot plate 82 and an L-shaped slot plate 83 fixedly connected below it. The L-shaped slot plate 83 is fixedly connected to the lower ring frame 2 by an inclined support plate 81. Several sliding shafts 84 are slidably provided on the C-shaped slot plate 82. The upper and lower ends of the sliding shafts 84 are respectively fixedly connected to a pressure plate 85 and a moving contact plate 86. In addition, a stationary contact plate 87 is provided at the bottom of the L-shaped slot plate 83. With the above structure, when the rotating rod 5 rotates and moves the pressure plate 52, the pressure plate 52 will squeeze the pressure plate 85 downward, so that the moving contact plate 86 contacts the stationary contact plate 87, which plays the role of connecting the working circuit of the dust removal mechanism 7.

[0045] In addition, a return spring 88 is provided on the sliding shaft 84 between the pressure plate 85 and the C-shaped groove plate 82, and an anti-detachment disc is fixedly sleeved on the bottom of the sliding shaft 84 on the lower side of the C-shaped groove plate 82. With the above structure, when the rotating rod 5 rotates and causes the pressure plate 52 to separate from the pressure plate 85, the return spring 88 can push the pressure plate 85 to move upward, so that the moving contact plate 86 and the stationary contact plate 87 separate from each other, thereby cutting off the working circuit of the dust removal mechanism 7 and causing it to stop working.

[0046] like Figure 5 As shown, the dust removal mechanism 7 includes a movable mounting platform 71 slidably mounted on a fixed rod 21. A centrally arranged disc motor 72 is mounted on the movable mounting platform 71. The output shaft of the disc motor 72 is fixedly connected to a brush disc 73 with flexible bristles 74 on its upper end face. Through the above structure, the disc motor 72 can drive the brush disc 73 with flexible bristles 74 to rotate, thereby cleaning the lens of the radar ranging mechanism 6 and ensuring that the radar ranging mechanism 6 can work normally.

[0047] In order to achieve the control of the working status of the dust cleaning mechanism 7 by the dust cleaning start / stop control mechanism 8, refer to Figure 4 , Figure 7Both the moving contact 86 and the stationary contact 87 are electrically connected to a continuity line 89. The continuity line 89 on the stationary contact 87 is electrically connected to the positive terminal of the disc motor 72, and the continuity line 89 on the moving contact 86 is electrically connected to the positive terminal of the external power supply. The negative terminal of the disc motor 72 is electrically connected to the negative terminal of the external power supply through a wire. With the above structure, when the moving contact 86 and the stationary contact 87 are in contact, the working circuit of the disc motor 72 is turned on. At this time, the disc motor 72 drives the brush disc 73 with flexible bristles 74 to rotate and perform cleaning work. When the moving contact 86 and the stationary contact 87 are separated, the working circuit of the disc motor 72 is turned off, and it stops working, which saves energy and avoids it from wasting energy by working continuously.

[0048] like Figure 3 As shown, the radar ranging mechanism 6 includes a sliding frame 61 slidably sleeved on the rotating rod 5. A radar ranging camera 62 is fixedly installed on the lower end face of the sliding frame 61, and a transparent cover 63 is provided on the lens cover of the radar ranging camera 62. In addition, a locking bolt 66 is threadedly connected to the sliding frame 61. Through the above structure, the working radius of the radar ranging camera 62 can be changed by sliding the sliding frame 61, which is convenient to adjust its working radius according to specific conditions, so as to achieve better detection effect. After the adjustment is completed, its position can be fixed by tightening the locking bolt 66.

[0049] Among them, the aforementioned radar ranging camera 62 is a type of lidar for grain silos. It can quickly scan grain piles without contacting the grain and calculate the height and volume of the grain pile by measuring the time it takes for the laser to return, thereby accurately determining the quantity of grain in the silo. This is a common technology, such as the infrared high-definition camera with a built-in laser ranging sensor cited in the utility model patent with announcement number CN207963766U. In addition, there are already many lidar products on the market for grain silo inspection, such as the KR S50. These products have been widely used in various grain silos to help managers perform tasks such as grain quantity statistics, quality inspection, and safety monitoring.

[0050] In addition, a battery compartment 64 electrically connected to the radar ranging camera 62 is installed on the lower end face of the sliding frame 61. A battery block 65 for powering the radar ranging camera 62 is installed in the battery compartment 64. Through the above structure, the radar ranging camera 62 can be powered and its continuous movement will not be affected by the laying of the line.

[0051] like Figure 6As shown, the rotating shaft seat 3 includes mounting cylinders 31 fixedly installed on the upper and lower sides of the middle part of the upper ring frame 1, and each mounting cylinder 31 is equipped with a fixed bearing 32. The mounting cylinder 31 is provided with a rotating central shaft 33, and the central shaft 33 is fixedly connected to the inner ring of the fixed bearing 32. The bottom of the central shaft 33 is fitted with a fixedly connected mounting sleeve 34. The end of the rotating rod 5 is fixedly connected to the mounting sleeve 34. Through the above structure, the position of the rotating rod 5 can be fixed by the fixed bearing 32, but at the same time, it will not hinder its free rotation. In addition, the fixed bearing 32 and the mounting sleeve 34 are used to share almost all the load, ensuring that the drive mechanism 4 can have a good working condition.

[0052] like Figure 3 As shown, an annular groove 11 is provided on the lower side of the upper ring frame 1. The overlapping block 51 is L-shaped and its upper side overlaps in the annular groove 11. Through the above structure, the overlapping block 51 can slide and overlap in the annular groove 11, which can effectively support the end of the rotating rod 5 and prevent it from becoming a cantilever structure due to the lack of end support structure, so that the rotating shaft seat 3 is subjected to a large bending moment and its service life is affected.

[0053] like Figure 6 As shown, the upper ring frame 1 is provided with a drive mechanism 4 in the middle for driving the central rotating shaft 33 to rotate. The drive mechanism 4 includes a motor bracket 41, on which a drive motor 42 with an output shaft that is connected to the central rotating shaft 33 is mounted. With the above structure, the central rotating shaft 33 can be driven to rotate by the operation of the drive motor 42, thereby driving the rotating rod 5 to rotate.

[0054] like Figure 1 As shown, the upper ring frame 1 and the lower ring frame 2 are fixedly connected by a connector 9. The connector 9 includes a hinge seat 91 provided on the side of the upper ring frame 1 and the lower ring frame 2. A diagonal brace 92 is connected between the hinge seats 91 of the two. Through the above structure, the fixed connection between the upper ring frame 1 and the lower ring frame 2 can be realized, and the necessary structural foundation can be provided for replacing the lower ring frame 2 with a matching size according to the actual situation.

[0055] The principle and process of using this invention:

[0056] The rotating rod 5 can rotate periodically clockwise along the upper ring frame 1, thereby driving the radar ranging mechanism 6 installed on it to rotate periodically above the grain silo, ensuring that the radar ranging mechanism 6 can detect almost all positions inside the grain silo; and in the above process, since the working direction of the radar ranging mechanism 6 is always perpendicular to the ground and the height is fixed, there is almost no change in angle and height, so the design of the relevant algorithm is relatively simple and the data is relatively accurate; in addition, the working radius of the radar ranging camera 62 can be changed by sliding the sliding frame 61, which makes it easy to adjust its working radius according to specific conditions, resulting in better detection effect, and after the adjustment is completed, its position can be fixed by tightening the locking bolt 66.

[0057] In addition, the cleaning mechanism 7 can clean the floating dust on the lens of the radar ranging mechanism 6, preventing dust from affecting its normal operation. In particular, the cleaning mechanism 7 is normally in standby mode, and only when the rotating rod 5 moves the radar ranging mechanism 6 to approach and trigger the nearby cleaning start-stop control mechanism 8 will it be in working mode, thus having an energy-saving effect.

[0058] The above technical principle is specifically manifested as follows: when the rotating rod 5 rotates and moves the pressure plate 52, the pressure plate 52 will squeeze the pressure plate 85 downward, so that the moving contact plate 86 contacts the stationary contact plate 87. At this time, the disc motor 72 works to drive the brush disc 73 with flexible bristles 74 to rotate, and clean the transparent cover 63 of the radar ranging camera 62 that is about to be installed. When the rotating rod 5 rotates and separates the pressure plate 52 from the pressure plate 85, the return spring 88 can push the pressure plate 85 upward, so that the moving contact plate 86 and the stationary contact plate 87 separate from each other, thereby cutting off the working circuit of the disc motor 72 and causing it to stop working, which has an energy-saving effect.

[0059] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A rotating laser radar for detecting raw grain in a granary, characterized in that: include: An upper ring frame (1) and a lower ring frame (2), wherein a rotating shaft seat (3) is provided in the middle of the upper ring frame (1), and a fixing rod (21) is provided in the lower ring frame (2); A rotating rod (5) is mounted on the rotating shaft seat (3) and a radar ranging mechanism (6) is slidably arranged on the rotating rod; A dust cleaning mechanism (7) is slidably disposed on the fixed rod (21) and is used to clean floating dust on the radar ranging mechanism (6); A dust cleaning start and stop control mechanism (8), which is used to control the start and stop of the dust cleaning mechanism (7); The end of the rotating rod (5) is fixedly connected to a lap block (51), and the outer end of the lap block (51) is provided with a pressure plate (52) for contacting the dust cleaning start and stop control mechanism (8) when rotating.

2. The rotating laser radar for detecting raw grain in a granary according to claim 1, characterized in that: The dust cleaning start-stop control mechanism (8) comprises a C-shaped slot plate (82) and an L-shaped slot plate (83) fixedly connected thereto, wherein the L-shaped slot plate (83) is fixedly connected to the lower ring frame (2) via an inclined support plate (81), a plurality of sliding shafts (84) are slidably provided on the C-shaped slot plate (82), a pressure plate (85) and a moving contact plate (86) are fixedly connected to the upper and lower ends of the sliding shaft (84), and a static contact plate (87) is provided at the bottom of the L-shaped slot plate (83).

3. The rotating laser radar for detecting raw grain in a granary according to claim 2 is characterized in that: The sliding shaft (84) is provided with a return spring (88) on its outer sleeve, and the return spring (88) is located between the pressure plate (85) and the C-shaped groove plate (82). The bottom fixed sleeve of the sliding shaft (84) is provided with an anti-slip disc located on the lower side of the C-shaped groove plate (82).

4. The rotating laser radar for detecting raw grain in a granary according to claim 2, characterized in that: The dust cleaning mechanism (7) comprises a movable mounting platform (71) slidably arranged on a fixed rod (21), a centrally arranged disc motor (72) being mounted on the movable mounting platform (71), and a brush disc (73) having flexible bristles (74) disposed on its upper end surface being fixedly connected to the output shaft of the disc motor (72).

5. The rotating laser radar for detecting raw grain in a granary according to claim 4, characterized in that: The ends of the moving contact piece (86) and the stationary contact piece (87) are both electrically connected with a make-break wire (89), wherein the make-break wire (89) on the stationary contact piece (87) is electrically connected to the positive pole of the disc motor (72), the make-break wire (89) on the moving contact piece (86) is electrically connected to the positive pole of the external power supply, and the negative pole of the disc motor (72) is electrically connected to the negative pole of the external power supply via a wire.

6. The rotating laser radar for detecting raw grain in a granary according to claim 1, characterized in that: The radar ranging mechanism (6) comprises a sliding frame (61) slidably sleeved on the rotating rod (5), a radar ranging camera (62) being fixedly mounted on the lower end surface of the sliding frame (61), and a transparent cover (63) being provided on the lens cover of the radar ranging camera (62), a locking bolt (66) being threadedly connected on the sliding frame (61), a battery compartment (64) electrically connected to the radar ranging camera (62) being mounted on the lower end surface of the sliding frame (61), and a storage battery block (65) for supplying power to the radar ranging camera (62) being mounted in the battery compartment (64).

7. The rotating laser radar for detecting raw grain in a granary according to claim 1, characterized in that: The rotating shaft seat (3) comprises a mounting cylinder (31) fixedly arranged at the upper and lower sides of the middle part of the upper ring frame (1), and a fixed bearing (32) is installed in each of the mounting cylinders (31). A rotating central shaft (33) is arranged in the mounting cylinder (31), and the central shaft (33) is fixedly connected to the inner ring of the fixed bearing (32). A mounting sleeve (34) is fixedly connected to the bottom of the central shaft (33), and the end of the rotating rod (5) is fixedly connected to the mounting sleeve (34).

8. The rotating laser radar for detecting raw grain in a granary according to claim 1, characterized in that: The lower side of the upper ring frame (1) is provided with an annular lap groove (11), the lap block (51) is L-shaped, and its upper side is lapped in the annular lap groove (11).

9. The rotating laser radar for detecting raw grain in a granary according to claim 7, characterized in that: A driving mechanism (4) for driving the rotating shaft (33) to rotate is provided in the middle of the upper ring frame (1). The driving mechanism (4) comprises a motor bracket (41). A driving motor (42) is mounted on the motor bracket (41) and is transmission-connected to the rotating shaft (33).

10. The rotating laser radar for detecting raw grain in a granary according to claim 1, characterized in that: The upper ring frame (1) and the lower ring frame (2) are fixedly connected via a connecting member (9), wherein the connecting member (9) comprises a hinge seat (91) arranged on the side of the upper ring frame (1) and the lower ring frame (2), and a diagonal brace (92) is connected between the hinge seats (91) of the two.

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