Matrix type multi-tension-sensor high-reliability unmanned aerial vehicle heavy load performance test platform

Abstract

The invention discloses a matrix type multi-tension sensor high-reliability unmanned aerial vehicle heavy load performance test platform, and relates to the field of test devices.The test platform comprises a test frame connecting plate, the top of the test frame connecting plate is provided with a fixing seat, and the top of the fixing seat is provided with four groups of first tension and pressure sensors; the four groups of first tension and pressure sensors are distributed at the top of the fixed seat in a matrix manner, and bearing seats are mounted at the tops of the first tension and pressure sensors. Torque is indirectly measured by measuring tension, the transmission shaft and the second tension and pressure sensor form an angle of 90 degrees, the bearing sleeve on the cross rod is in point contact with the second tension and pressure sensor and impacts a contact plate on the second tension and pressure sensor, and the bearing eliminates the torque brought by the transmission shaft through rotation. The second tension and pressure sensors are only subjected to single tension, the torque generated by operation of the unmanned aerial vehicle is calculated through the torque M = F * L, and the four first tension and pressure sensors are distributed in a matrix mode and share the tension jointly.

Description

Technical Field

[0001] The invention relates to the field of testing devices, in particular to a matrix-type multi-tension sensor high-reliability unmanned aerial vehicle heavy-load performance testing platform. Background Art

[0002] Since 2022, the scale of the drone market has expanded year by year, the global drone market has maintained rapid growth, and the industrial chain has gradually improved, including drone research and development, testing, production, sales, training, maintenance and other fields. The application scenarios have gradually shifted from consumer-grade drones to industrial-grade drones, and the "low-altitude economy" phenomenon has become increasingly obvious. In application fields such as agricultural plant protection, power inspection, aerial photography and mapping, police security, environmental monitoring, railway construction, disaster relief, etc., the market urgently needs heavy-load application drones, and solving the load problem will become the key to its rapid development. The drone needs to be tested after production, and the drone torque load test platform can test whether the drone meets the usage standards.

[0003] In the current UAV torque load test platform, when the heavy-load motor is running, the blades swing up and down with a large amplitude, resulting in excessive swing force between the linear bearing and the step shaft, severe wear of the step shaft, and the bearing for measuring torque is very easy to be damaged. In addition, when the test is repeated, the test data fluctuates greatly and the data consistency is very poor. It cannot simulate the actual flight state well, which poses a relatively large risk for market introduction. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a matrix multi-tension sensor high-reliability UAV heavy-load performance test platform to solve the technical problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a matrix-type multi-tension force sensor high-reliability UAV heavy-load performance test platform, comprising a test frame connecting plate, a fixing seat is installed on the top of the test frame connecting plate, and four groups of the first tension and pressure sensors are arranged on the top of the fixing seat, and the four groups of the first tension and pressure sensors are distributed in a matrix on the top of the fixing seat, a bearing seat is installed on the top of the first tension and pressure sensor, and a fixing plate is arranged above the bearing seat, an adapter plate is installed on the top of the fixing plate, and a motor is arranged on the top of the adapter plate, and the test frame connecting plate A fixing sleeve is installed at the bottom, and a transmission shaft is movably installed inside the fixing sleeve, a rotor assembly is provided on the outer wall of the transmission shaft, and the top of the transmission shaft is connected to the fixing plate, a mounting rod is installed at the bottom of the transmission shaft, and a 95 is fixed at the bottom of the mounting rod, the rotor assembly includes a rotating rod sleeved on the outer wall of the transmission shaft, and a cross bar is movably installed at one end of the rotating rod, a first bearing is sleeved on the end of the cross bar, and a bearing sleeve is sleeved on the outer wall of the first bearing, two groups of the force seats are installed on the end of the test frame connecting plate, and a second tension and pressure sensor is movably installed at the bottom of the force seat.

[0006] By adopting the above technical solution, the torque is indirectly measured by measuring the tension. The transmission shaft and the second tension and pressure sensor are at 90 degrees. The bearing sleeve on the crossbar is in point contact with the second tension and pressure sensor and hits the contact plate on the second tension and pressure sensor. The bearing eliminates the torque brought by the transmission shaft by rotation, so that the second tension and pressure sensor is only subjected to a single tension. The torque generated by the operation of the drone is calculated through the torque M=F*L. Four first tension and pressure sensors are distributed in a matrix to share the tension. At the same time, the bearing seat can move up and down to reduce the high-frequency vibration of the load test and the propeller yaw force. The measurement accuracy is accurate to 0.1Kg level. Two second bearings are used to fix the transmission shaft to reduce vibration. A linear bearing is used to fix the transmission shaft to transmit the vibration to the fixed seat, eliminating the interference of vibration and other factors on the test, and allowing the transmission shaft to slide axially and rotate radially freely in a small range, which increases the measurement accuracy and stability of the device. The rotating rod sleeve is set on the outer wall of the mounting rod, and it is locked with two M10 screws and fixed with a flat key to increase the structural stability, ensure the coaxiality between the bearing seat and the linear bearing sleeve and the fixed sleeve, ensure that they are on the same center line, increase data accuracy, and prevent external interference.

[0007] The present invention is further configured such that a fixed block is fixed on the top of the second tension and pressure sensor, and the top of the fixed block is in contact with the bottom of the force-bearing seat, a screw is sleeved inside the fixed block, and the screw passes through the two groups of fixed blocks, and the screw is movably connected to the force-bearing seat, and the outer wall of the screw is provided with positive and negative threads.

[0008] As a preferred embodiment, it is convenient to adjust the distance between the two groups of second tension and pressure sensors and the bearing sleeve, so as to achieve the purpose of clamping the bearing sleeve by the two groups of second tension and pressure sensors.

[0009] The present invention is further configured such that a contact plate is installed on one side of the second tension and pressure sensor, and two groups of the contact plates are distributed on both sides of the bearing sleeve.

[0010] Preferably, the contact plate can reduce the contact area with the bearing sleeve, thereby ensuring that the second tension and pressure sensor is only subjected to a single tension.

[0011] The present invention is further configured such that a screw rod is fixed to the end of the cross rod, a mounting hole is opened at one end of the rotating rod, and the mounting hole is threadedly connected to the screw rod.

[0012] Preferably, the cross bar can be installed by cooperating with the screw rod and the installation hole, thereby ensuring that the cross bar and the rotating rod are fixed.

[0013] The present invention is further configured such that a through hole is provided at the other end of the rotating rod, and limiting grooves are provided on both sides of the inner wall of the through hole, vertical rods are fixed on both sides of the mounting rod, and the outer walls of the vertical rods are in contact with the inner walls of the limiting grooves.

[0014] Preferably, by opening a through hole, the rotating rod can be sleeved on the outer wall of the mounting rod, and the limit groove and the vertical rod cooperate with each other, so that the rotating rod can slide in a directional manner on the outer wall of the mounting rod, thereby facilitating the insertion of the M screw into the socket.

[0015] The present invention is further configured such that two groups of insertion holes are formed on the outer wall of the mounting rod, and the rotating rod is connected to the mounting rod by bolts.

[0016] Preferably, the provided insertion hole can facilitate the insertion of an M screw, and the rotating rod and the mounting rod are fixed by two M screws.

[0017] The present invention is further configured such that a linear bearing is installed at the end of the transmission rod, a connecting plate is installed at the bottom of the fixed sleeve by bolts, and a linear bearing sleeve is fixed on the top of the connecting plate, and the inner wall of the linear bearing sleeve is in contact with the outer wall of the linear bearing.

[0018] Preferably, the inner wall of the linear bearing sleeve fits with the outer wall of the linear bearing, and the linear bearing fixes the bottom of the transmission shaft to transmit the vibration to the fixed seat, eliminating the interference of factors such as vibration on the test, and allowing the transmission shaft to slide axially and rotate radially freely in a small range, ensuring the coaxiality between the bearing seat and the linear bearing sleeve and the fixed sleeve, ensuring that they are on the same center line, increasing data accuracy, and preventing external interference.

[0019] The present invention is further configured such that a positioning block is fixed on one side of the second tension and pressure sensor, and a through hole is opened inside the positioning block, and a fixing rod is fixed on one side of the force bearing seat, and the outer wall of the fixing rod is in contact with the inner wall of the through hole.

[0020] Preferably, the positioning block cooperates with the fixing rod to support the second tension and pressure sensor. When the screw rod rotates, the second tension and pressure sensor can only move laterally under the action of the fixing rod.

[0021] The present invention is further configured such that a handle is fixed to the end of the screw rod, and two sets of the second bearings are sleeved on the outer wall of the transmission shaft.

[0022] Preferably, a handle is provided to facilitate personnel to rotate the screw, thereby adjusting the distance between the two groups of second tension and pressure sensors, and the second bearing can fix the transmission shaft while reducing its vibration.

[0023] In summary, the present invention mainly has the following beneficial effects:

[0024] 1. The present invention is provided with a motor, a first tension and pressure sensor, a second tension and pressure sensor, a rotor assembly and a transmission shaft, and indirectly measures torque by measuring tension. The transmission shaft is 90 degrees to the second tension and pressure sensor, and the bearing sleeve on the crossbar is in point contact with the second tension and pressure sensor and hits the contact plate on the second tension and pressure sensor. The bearing eliminates the torque brought by the transmission shaft by rotation, so that the second tension and pressure sensor is only subjected to a single tension. The torque generated by the operation of the drone is calculated through the torque M=F*L. Four first tension and pressure sensors are distributed in a matrix to share the tension. At the same time, the bearing seat can move up and down to reduce the load test. High-frequency vibration and propeller yaw force can be measured with an accuracy of 0.1Kg. Two second bearings are used to fix the transmission shaft to reduce vibration. A linear bearing is used to fix the transmission shaft to transmit the vibration to the fixed seat, eliminating the interference of vibration and other factors on the test, and allowing the transmission shaft to slide axially and rotate radially freely in a small range, thereby increasing the measurement accuracy and stability of the device. The rotating rod sleeve is arranged on the outer wall of the mounting rod, and is locked with two M10 screws and fixed with a flat key to increase the structural stability, ensure the coaxiality between the bearing seat and the linear bearing sleeve and the fixed sleeve, ensure that they are on the same center line, increase data accuracy, and prevent external interference.

[0025] 2. The present invention is provided with a screw, a fixing block, a fixing rod and a positioning block, so as to facilitate adjustment of the distance between the two sets of second tension and pressure sensors and the bearing sleeve, thereby achieving the purpose of clamping the bearing sleeve by the two sets of second tension and pressure sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the connection between the rotor assembly and the transmission shaft of the present invention;

[0028] Figure 3 It is a schematic diagram of the disassembly of the fixing sleeve and the connecting plate of the present invention;

[0029] Figure 4 It is a schematic diagram of the disassembly of the rotor assembly of the present invention;

[0030] Figure 5 It is a schematic diagram of the connection between the force bearing seat and the second tension and pressure sensor of the present invention.

[0031] Description of reference numerals:

[0032] 1. Test frame connecting plate; 2. Fixed seat; 3. Bearing seat; 4. First pull pressure sensor; 5. Fixed plate; 51. Adapter plate; 6. Motor; 7. Fixed sleeve; 71. Connecting plate; 72. Linear bearing sleeve; 8. Rotor assembly; 81. Cross bar; 82. First bearing; 83. Bearing sleeve; 84. Rotating rod; 85. Mounting hole; 86. Through hole; 87. Limiting groove; 88. Screw rod; 89. Block; 9. Transmission shaft; 91. Second bearing; 92. Mounting rod; 93. Socket; 94. Vertical rod; 95. Transmission rod; 96. Linear bearing; 10. Second pull pressure sensor; 11. Force seat; 12. Fixed block; 13. Screw rod; 14. Handle; 15. Contact plate; 16. Fixed rod; 17. Threaded hole; 18. Positioning block; 19. Through hole. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] The following describes an embodiment of the present invention based on its overall structure.

[0035] See also Figure 1-Figure 5, including a test frame connecting plate 1, a fixing seat 2 is installed on the top of the test frame connecting plate 1, and four groups of first tension and pressure sensors 4 are arranged on the top of the fixing seat 2, and the four groups of first tension and pressure sensors 4 are distributed in a matrix on the top of the fixing seat 2, a bearing seat 3 is installed on the top of the first tension and pressure sensor 4, and a fixing plate 5 is arranged above the bearing seat 3, an adapter plate 51 is installed on the top of the fixing plate 5, and a motor 6 is arranged on the top of the adapter plate 51, a fixing sleeve 7 is installed on the bottom of the test frame connecting plate 1, and a transmission shaft 9 is movably installed inside the fixing sleeve 7, a rotor assembly 8 is arranged on the outer wall of the transmission shaft 9, and the top of the transmission shaft 9 is connected to the fixing plate 5, and the transmission shaft 9 A mounting rod 92 is installed at the bottom, and a 95 is fixed to the bottom of the mounting rod 92. The rotor assembly 8 includes a rotating rod 84 sleeved on the outer wall of the transmission shaft 9, and a cross bar 81 is movably installed at one end of the rotating rod 84, and a stopper 89 is movably installed at the end of the cross bar 81. The stopper 89 can limit the first bearing 82 sleeved on the outer wall of the cross bar 81, thereby avoiding the problem of the first bearing 82 being separated from the cross bar 81. The end of the cross bar 81 is sleeved with the first bearing 82, and the outer wall of the first bearing 82 is sleeved with a bearing sleeve 83. Two sets of force seats 11 are installed at the end of the test frame connecting plate 1, and a second tension and pressure sensor 10 is movably installed at the bottom of the force seat 11.

[0036] In the above embodiments, please refer to Figure 2 and Figure 5 A fixing block 12 is fixed on the top of the second tension and pressure sensor 10, and the top of the fixing block 12 is fitted with the bottom of the force-bearing seat 11. A screw 13 is sleeved inside the fixing block 12, and the screw 13 passes through the two groups of fixing blocks 12, and the screw 13 is movably connected to the force-bearing seat 11. The outer wall of the screw 13 is provided with positive and negative threads. When the screw 13 rotates, according to the screw principle, the screw 13 rotates to adjust the distance between the two groups of second tension and pressure sensors 10, so that the contact plate 15 on one side of the two groups of second tension and pressure sensors 10 contacts the bearing sleeve 83.

[0037] In the above embodiments, please refer to Figure 5 A contact plate 15 is installed on one side of the second tension and pressure sensor 10. Two groups of contact plates 15 are distributed on both sides of the bearing sleeve 83. The contact plate 15 can reduce the contact area with the bearing sleeve 83, thereby ensuring that the second tension and pressure sensor 10 is only subjected to a single tension.

[0038] In the above embodiments, please refer to Figure 4 A screw rod 88 is fixed at the end of the cross bar 81, and a mounting hole 85 is opened at one end of the rotating rod 84, and the mounting hole 85 is threadedly connected to the screw rod 88. The screw rod 88 cooperates with the mounting hole 85, so that the cross bar 81 can be installed, ensuring that the cross bar 81 and the rotating rod 84 are fixed.

[0039] In the above embodiments, please refer to Figure 4 A through hole 86 is provided at the other end of the rotating rod 84, and limiting grooves 87 are provided on both sides of the inner wall of the through hole 86. Vertical rods 94 are fixed on both sides of the mounting rod 92, and the outer wall of the vertical rod 94 fits with the inner wall of the limiting groove 87. By providing the through hole 86, the rotating rod 84 can be sleeved on the outer wall of the mounting rod 92, and the limiting groove 87 cooperates with the vertical rod 94, so that the rotating rod 84 can slide in a directional manner on the outer wall of the mounting rod 92, thereby facilitating the insertion of the M10 screw into the socket 93.

[0040] In the above embodiments, please refer to Figure 4 Two sets of jacks 93 are provided on the outer wall of the mounting rod 92, and the rotating rod 84 is connected to the mounting rod 92 by bolts. The opened jacks can facilitate the insertion of M10 screws, and the rotating rod 84 and the mounting rod 92 are fixed by two M10 screws.

[0041] In the above embodiments, please refer to Figure 3 A linear bearing 96 is installed at the end of the transmission rod 95, a connecting plate 71 is installed at the bottom of the fixed sleeve 7 by bolts, and a linear bearing sleeve 72 is fixed on the top of the connecting plate 71, the inner wall of the linear bearing sleeve 72 fits with the outer wall of the linear bearing 96, and the linear bearing 96 fixes the bottom of the transmission shaft 9 to transmit the vibration to the fixed seat 2, eliminating the interference of factors such as vibration on the test, and allowing the transmission shaft 9 to slide axially and rotate radially freely in a small range, ensuring the coaxiality between the bearing seat 3 and the linear bearing sleeve 72 and the fixed sleeve 7, ensuring that they are on the same center line, increasing data accuracy, and preventing external interference.

[0042] In the above embodiments, please refer to Figure 5 A positioning block 18 is fixed on one side of the second tension and pressure sensor 10, and a through hole 19 is opened inside the positioning block 18. A fixing rod 16 is fixed on one side of the force-bearing seat 11, and the outer wall of the fixing rod 16 is in contact with the inner wall of the through hole 19. The positioning block 18 cooperates with the fixing rod 16 to support the second tension and pressure sensor 10. When the screw 13 rotates, under the action of the fixing rod 16, the second tension and pressure sensor 10 can only move laterally.

[0043] In the above embodiments, please refer to Figure 3 and Figure 4 A handle 14 is fixed to the end of the screw rod 13, and two sets of second bearings 91 are sleeved on the outer wall of the transmission shaft 9. The handle 14 can facilitate personnel to rotate the screw rod 13, thereby adjusting the distance between the two sets of second tension and pressure sensors 10. The second bearing 91 can fix the transmission shaft 9 while reducing its vibration.

[0044] The present invention is in specific operation: when working, the motor 6 is started, and the motor drives the adapter plate 51 to rotate, thereby driving the transmission shaft 9 to rotate, and indirectly measuring the torque by measuring the tension (it is known that M=F*L, the arm length L=0.250m, the tension and pressure sensor range is 500Kg, and the maximum theoretical measurable torque is 1250N.m). The transmission shaft 9 is 90° with the second tension and pressure sensor 10, and the bearing sleeve 83 sleeved on the cross bar 8 is in point contact with the second tension and pressure sensor 10 (reducing the force area, accurately determining the arm length, and reducing internal interference factors), and hits the contact plate on the second tension and pressure sensor 10. The first bearing 82 eliminates the torque brought by the transmission shaft 9 by rotating, so that the second tension and pressure sensor 10 is only subjected to a single tension. Through the torque M=F*L, the torque generated by the operation of the drone is calculated, and four first tension and pressure sensors 4 (with a range of 5 00Kg) are distributed in a matrix to share the tension. At the same time, the bearing seat 3 can move up and down (due to the matrix distribution of the tension and pressure sensors, radial tension is eliminated), reducing the high-frequency vibration of the load test and the propeller yaw force, and the measurement accuracy is accurate to 0.1Kg level. Two second bearings 91 are used to fix the transmission shaft 9 to reduce vibration. A linear bearing 96 is used to fix the bottom of the transmission shaft 9 to transmit the vibration to the fixed seat 2, eliminating the interference of factors such as vibration on the test, and allowing the transmission shaft 9 to slide axially and rotate radially freely in a small range, thereby increasing the measurement accuracy and stability of the device. The rotating rod 84 is sleeved on the outer wall of the mounting rod 92, and is locked with two M10 screws and fixed with a flat key to increase the structural stability, ensure the coaxiality between the bearing seat 3 and the linear bearing sleeve 72 and the fixed sleeve 7, ensure that they are on the same center line, increase data accuracy, and prevent external interference.

[0045] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A matrix type multi-tension sensor high reliability UAV heavy load performance test platform, comprising a test frame connecting plate (1), characterized in that: A fixing seat (2) is installed on the top of the test frame connecting plate (1), and four groups of the first tension and pressure sensors (4) are arranged on the top of the fixing seat (2), and the four groups of the first tension and pressure sensors (4) are distributed in a matrix on the top of the fixing seat (2). A bearing seat (3) is installed on the top of the first tension and pressure sensor (4), and a fixing plate (5) is arranged above the bearing seat (3). An adapter plate (51) is installed on the top of the fixing plate (5), and a motor (6) is arranged on the top of the adapter plate (51). A fixing sleeve (7) is installed on the bottom of the test frame connecting plate (1), and a transmission shaft (9) is movably installed inside the fixing sleeve (7), and the transmission shaft (9) is The outer wall is provided with a rotor assembly (8), and the top of the transmission shaft (9) is connected to the fixed plate (5), the bottom of the transmission shaft (9) is installed with a mounting rod (92), and the bottom of the mounting rod (92) is fixed with 95, the rotor assembly (8) includes a rotating rod (84) sleeved on the outer wall of the transmission shaft (9), and a cross bar (81) is movably installed at one end of the rotating rod (84), the end of the cross bar (81) is sleeved with a first bearing (82), and the outer wall of the first bearing (82) is sleeved with a bearing sleeve (83), and two groups of the force bearing seats (11) are installed at the end of the test frame connecting plate (1), and a second tension and pressure sensor (10) is movably installed at the bottom of the force bearing seat (11).

2. The matrix multi-tension sensor high reliability UAV heavy load performance test platform according to claim 1 is characterized by: A fixing block (12) is fixed on the top of the second tension and pressure sensor (10), and the top of the fixing block (12) is in contact with the bottom of the force-bearing seat (11). A screw (13) is sleeved inside the fixing block (12), and the screw (13) passes through two groups of the fixing blocks (12). The screw (13) is movably connected to the force-bearing seat (11), and the outer wall of the screw (13) is provided with positive and negative threads.

3. The matrix multi-tension sensor high reliability UAV heavy load performance test platform according to claim 1 is characterized by: A contact plate (15) is installed on one side of the second tension and pressure sensor (10), and two groups of the contact plates (15) are distributed on both sides of 83.

4. The matrix multi-tension sensor high reliability UAV heavy load performance test platform according to claim 1 is characterized by: A screw rod (88) is fixed to the end of the cross rod (81), and a mounting hole (85) is provided at one end of the rotating rod (84), and the mounting hole (85) is threadedly connected to the screw rod (88).

5. The matrix multi-tension sensor high reliability UAV heavy load performance test platform according to claim 1 is characterized by: A through hole (86) is provided at the other end of the rotating rod (84), and limiting grooves (87) are provided on both sides of the inner wall of the through hole (86). Vertical rods (94) are fixed on both sides of the mounting rod (92), and the outer wall of the vertical rod (94) is in contact with the inner wall of the limiting groove (87).

6. The matrix multi-tension sensor high reliability UAV heavy load performance test platform according to claim 1 is characterized by: The outer wall of the installation rod (92) is provided with two groups of insertion holes (93), and the rotating rod (84) is connected to the installation rod (92) by means of bolts.

7. The matrix multi-tension sensor high reliability UAV heavy load performance test platform according to claim 1 is characterized by: A linear bearing (96) is installed at the end of the transmission rod (95), a connecting plate (71) is installed at the bottom of the fixing sleeve (7) through bolts, and a linear bearing sleeve (72) is fixed on the top of the connecting plate (71), and the inner wall of the linear bearing sleeve (72) is in contact with the outer wall of the linear bearing (96).

8. The matrix multi-tension sensor high reliability UAV heavy load performance test platform according to claim 2 is characterized by: A positioning block (18) is fixed on one side of the second tension and pressure sensor (10), and a through hole (19) is provided inside the positioning block (18); a fixing rod (16) is fixed on one side of the force bearing seat (11), and the outer wall of the fixing rod (16) is in contact with the inner wall of the through hole (19).

9. The matrix multi-tension sensor high reliability UAV heavy load performance test platform according to claim 2 is characterized by: A handle (14) is fixed to the end of the screw rod (13), and two sets of the second bearings (91) are sleeved on the outer wall of the transmission shaft (9).

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