A UAV blade balance detection device

Abstract

The utility model provides a device for detecting the balance of unmanned aerial vehicle blades, which belongs to the field of dynamic balance test technology. It solves the problem that the current method of judging the direction of center of gravity deviation by observing the deflection direction and speed of the blades is easily affected by airflow, resulting in result deviation, limited accuracy, and the propeller is prone to slight vibrations during actual use. The device for detecting the balance of unmanned aerial vehicle blades includes a detection base, mounting plates fixed on both sides of the top of the detection base, a fixed frame fixed on the inner side of the mounting plate, a windshield protective cover movably connected to the top of the detection base, and a blade body, and also includes: a controller fixed on the front of the detection base, a mounting platform fixed on both sides of the fixed frame, and a wireless vibration sensor fixed on the surface of the mounting platform. The utility model uses a vibration sensor to detect the vibration of the high-speed rotation of the blades, so as to avoid vibration caused by slight mass differences when the blades rotate at high speed, and at the same time improve the detection accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic balance testing, and particularly relates to a balance detection device, in particular to a balance detection device for a propeller blade of an unmanned aerial vehicle. Background Art

[0002] The propeller imbalance of drones is the main source of vibration for vertical take-off and landing aircraft. Propellers are usually composed of multiple blades, and the mass of each blade may vary to a certain extent. When the propeller rotates at high speed, the above mass difference will produce alternating loads on the propeller, which manifests as dynamic imbalance. The dynamic imbalance phenomenon not only causes vibration and noise of the aircraft, but also reduces flight performance, handling quality and service life. In order to eliminate the above phenomenon, it is necessary to carry out dynamic balance testing of the propeller.

[0003] When checking the balance of the blades, the propeller to be adjusted is first fixed on the magnetic suspension balance shaft. If the center of gravity of the propeller to be adjusted is not in the same straight line as the axis of the magnetic suspension balance shaft, the propeller to be adjusted will slowly deflect under the action of gravity. The operator determines the direction of the center of gravity offset by observing the deflection direction and speed, and grinds the propeller material in the direction of the center of gravity offset accordingly to adjust the center of gravity of the propeller. This method is easily affected by the airflow generated by the staff during operation, and has low accuracy. The propeller is prone to slight vibrations during actual use. Utility Model Content

[0004] The purpose of the utility model is to address the above-mentioned problems in the existing technology and to propose a UAV blade balance detection device. The balance detection device uses a vibration sensor to detect the vibration of the high-speed rotating blades, thereby avoiding vibration caused by slight mass differences when the blades rotate at high speed, and at the same time improving the detection accuracy.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A device for detecting the balance of a propeller blade of an unmanned aerial vehicle comprises a detection base, mounting plates fixed to both sides of the top of the detection base, a fixing frame fixed to the inner side of the mounting plate, a windshield protective cover movably connected to the top of the detection base and a propeller blade body, and further comprises:

[0007] A controller fixed on the front of the detection base, a mounting platform fixed on both sides of the fixed frame, and a wireless vibration sensor fixed on the surface of the mounting platform. A driving motor is fixed on the top of the detection base.

[0008] The output shaft of the driving motor passes through the fixed frame and is fixed with a rotating block, and a stud is fixed on the top of the rotating block. The blade body is movably connected with the stud, and a fixing cap is threadedly connected to the top of the stud.

[0009] The working principle of the utility model is: the staff first pulls out the windshield protective cover from the arc groove on the top of the detection base and inserts the blade body into the surface of the stud. After the blade body is inserted, the staff re-tightens the fixing cap. During the detection, the drive motor is started to drive the blade body to rotate at high speed. If the weight of the blade body is unbalanced, vibration will be generated. At this time, the wireless vibration sensor can detect the vibration generated by the high-speed rotation of the blade body and transmit the electrical signal to the display screen on the controller. The staff can judge the detection result by the vibration size, and the windshield protective cover also plays a role in protecting the staff.

[0010] Arc grooves are arranged around the top of the detection base and are magnetically connected to the windshield protection cover.

[0011] The arc groove can be used to limit and fix the windshield protective cover.

[0012] A plurality of protection strips are fixed on the top of the windshield protection cover, and the protection strips are evenly distributed on the top of the windshield protection cover.

[0013] The use of a protective strip can protect the staff and prevent the blade body from falling and flying out.

[0014] Both sides of the windshield protective cover are fixed with convex strips, and the edges of the convex strips are designed in an arc shape.

[0015] The convex strips are used to facilitate the staff to remove the windshield protection cover.

[0016] The windshield protective cover is provided with ventilation slots on all sides and the ventilation slots are symmetrically designed.

[0017] The use of ventilation slots can prevent the airflow generated by the blade body from affecting the detection.

[0018] The inner side of the fixed frame is connected to a rotary bearing, and the rotary bearing is rotatably connected to the output shaft of the driving motor.

[0019] The use of a rotating bearing can reduce the friction of rotation and thus improve the accuracy of detection.

[0020] A rubber ring strip is fixed on the bottom of the detection base, and support blocks are fixed around the bottom of the detection base.

[0021] The detection base can be propped up by using a rubber ring strip and a supporting block.

[0022] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0023] 1. The utility model adopts a wireless vibration sensor to detect the vibration generated by the high-speed rotation of the blade body, and transmits the electrical signal to the display screen on the controller, so as to avoid the vibration caused by the slight mass difference when the blade rotates at high speed, and at the same time improves the detection accuracy. The fixing cap cooperates with the stud to fix the blade body, which is convenient for quick disassembly and installation of the blade body, and solves the problem that the current method of judging the center of gravity offset direction by observing the deflection direction and speed of the blade is easily affected by the airflow, resulting in result deviation, limited accuracy, and the propeller is prone to slight vibration in actual use.

[0024] 2. The utility model can limit the windshield protective cover through the arc groove, which is convenient for installing and fixing the windshield protective cover.

[0025] 3. The utility model facilitates airflow through the ventilation slots, thereby preventing the airflow generated by the blade body from affecting the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0027] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;

[0028] Figure 3 It is a partial three-dimensional structural schematic diagram of the utility model;

[0029] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the utility model.

[0030] In the figure: 1. detection base; 2. mounting plate; 3. fixing frame; 4. wind shield; 5. blade body; 6. controller; 7. mounting table; 8. wireless vibration sensor; 9. drive motor; 10. rotating block; 11. stud; 12. fixing cap; 13. arc groove; 14. protective strip; 15. convex strip; 16. ventilation groove; 17. rotating bearing; 18. rubber ring strip; 19. support block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1-Figure 4As shown, the unmanned aerial vehicle blade balance detection device comprises a detection base 1, a mounting plate 2, a fixing frame 3, a windshield protective cover 4 and a blade body 5, wherein the mounting plate 2 is fixed to both sides of the top of the detection base 1, the fixing frame 3 is fixed to the inner side of the mounting plate 2, the windshield protective cover 4 is movably connected to the top of the detection base 1, a controller 6 is fixed to the front of the detection base 1, mounting platforms 7 are fixed to both sides of the fixing frame 3, a wireless vibration sensor 8 is fixed to the surface of the mounting platform 7, the wireless vibration sensor 8 can detect the vibration generated by the high-speed rotation of the blade body 5, and transmit the electrical signal to the display screen on the controller 6, and a drive is fixed to the top of the detection base 1. The drive motor 9 can drive the blade body 5 to rotate at a high speed. The output shaft of the drive motor 9 passes through the fixed frame 3 and is fixed with a rotating block 10. A stud 11 is fixed on the top of the rotating block 10. The blade body 5 is movably connected with the stud 11. A fixing cap 12 is threadedly connected to the top of the stud 11. The fixing cap 12 cooperates with the stud 11 to fix the blade body 5, which is convenient for quick disassembly and installation of the blade body 5. It solves the problem that the current method of judging the center of gravity offset direction by observing the deflection direction and speed of the blade is easily affected by the airflow, resulting in result deviation, limited accuracy, and the propeller is prone to slight vibrations during actual use.

[0033] Arc grooves 13 are provided around the top of the detection base 1. The arc grooves 13 are connected to the windshield protective cover 4 by magnetic attraction. The arc grooves 13 can limit the windshield protective cover 4, making it easy to install and fix the windshield protective cover 4.

[0034] A plurality of protection strips 14 are fixed to the top of the windshield protective cover 4 . The protection strips 14 are evenly distributed on the top of the windshield protective cover 4 . The protection strips 14 can protect the staff and prevent the blade body 5 from falling and flying out.

[0035] Both sides of the windshield protective cover 4 are fixed with convex strips 15 , and the edges of the convex strips 15 are designed to be arc-shaped. The convex strips 15 can fit the hands of the staff, making it convenient for the staff to remove the windshield protective cover 4 .

[0036] Ventilation slots 16 are provided around the windshield protective cover 4. The ventilation slots 16 are symmetrically designed to facilitate airflow and prevent the airflow generated by the blade body 5 from affecting the detection.

[0037] The inner side of the fixed frame 3 is connected to a rotating bearing 17, and the rotating bearing 17 is rotatably connected to the output shaft of the driving motor 9. The rotating bearing 17 can reduce the friction of rotation and improve the accuracy of detection.

[0038] A rubber ring strip 18 is fixed to the bottom of the detection base 1, and support blocks 19 are fixed around the bottom of the detection base 1. The rubber ring strip 18 cooperates with the support blocks 19 to prop up the detection base 1, thereby increasing the friction of the bottom.

[0039] The working principle of the utility model is as follows: when performing a balance test on the blade body 5, the staff first pulls out the windshield protective cover 4 from the arc groove 13 on the top of the test base 1. After pulling it out, the staff unscrews the fixing cap 12 and inserts the blade body 5 into the surface of the stud 11. After the blade body 5 is inserted, the staff tightens the fixing cap 12 again to complete the fixation of the blade body 5. After the fixation is completed, the staff can re-fix the windshield protective cover 4 to start the test. During the test, the drive motor 9 is started. The drive motor 9 can drive the blade body 5 to rotate at a high speed. If the weight of the blade body 5 is unbalanced, vibration will be generated. At this time, the wireless vibration sensor 8 can detect the vibration generated by the high-speed rotation of the blade body 5, and transmit the electrical signal to the display screen on the controller 6. The staff can judge the test result by the size of the vibration. During the test, the ventilation slots 16 of the windshield protective cover 4 facilitate the circulation of airflow to prevent the airflow generated by the blade body 5 from affecting the test, and the windshield protective cover 4 also plays a role in protecting the staff.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A device for detecting the balance of a propeller blade of an unmanned aerial vehicle, comprising a detection base (1), mounting plates (2) fixed to both sides of the top of the detection base (1), a fixing frame (3) fixed to the inner side of the mounting plate (2), a windshield protective cover (4) movably connected to the top of the detection base (1) and a propeller blade body (5), characterized in that: Also includes: A controller (6) fixed on the front of the detection base (1), a mounting platform (7) fixed on both sides of the fixed frame (3), and a wireless vibration sensor (8) fixed on the surface of the mounting platform (7), wherein a driving motor (9) is fixed on the top of the detection base (1); The output shaft of the driving motor (9) passes through the fixed frame (3) and is fixed with a rotating block (10), and a stud (11) is fixed on the top of the rotating block (10); the blade body (5) is movably connected to the stud (11), and a fixing cap (12) is threadedly connected to the top of the stud (11).

2. The unmanned aerial vehicle blade balance detection device according to claim 1, characterized in that: The top of the detection base (1) is provided with arc-shaped grooves (13) on all sides thereof, which are connected to the windshield protection cover (4) by magnetic attraction.

3. The unmanned aerial vehicle blade balance detection device according to claim 1, characterized in that: A plurality of protection strips (14) are fixed on the top of the windshield protective cover (4), and the protection strips (14) are evenly distributed on the top of the windshield protective cover (4).

4. The UAV blade balance detection device according to claim 1, characterized in that: Both sides of the windshield protective cover (4) are fixed with convex strips (15), and the edges of the convex strips (15) are designed to be arc-shaped.

5. The UAV blade balance detection device according to claim 1, characterized in that: The windshield protective cover (4) is provided with ventilation slots (16) on all sides thereof, and the ventilation slots (16) are symmetrically designed.

6. The unmanned aerial vehicle blade balance detection device according to claim 1, characterized in that: The inner side of the fixed frame (3) is connected to a rotary bearing (17), and the rotary bearing (17) is rotatably connected to the output shaft of the drive motor (9).

7. The UAV blade balance detection device according to claim 1, characterized in that: A rubber ring strip (18) is fixed to the bottom of the detection base (1), and support blocks (19) are fixed around the bottom of the detection base (1).

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