Universal detection device for structural strength of unmanned aerial vehicle

Abstract

The invention discloses a universal detection device for structural strength of an unmanned aerial vehicle, and belongs to the technical fields of structural strength static test, strength application range verification and the like of unmanned aerial vehicles. In the suspended installation state, the device further comprises a suspended frame used for supporting and a sliding adjustable structure convenient to suspend. The sliding adjustable structure is supported by the suspension frame and located over the test table top, an unmanned aerial vehicle arm is hung on the sliding adjustable structure, and the bottom of the unmanned aerial vehicle is connected with the pull pressure sensor through a hook. In a supporting and mounting state, a plurality of telescopic supporting rods are also arranged on the test bench surface, and the telescopic supporting rods are arrayed around the pushing and pressing force lifting rods; the telescopic supporting rod serves as a support, and the top bears the unmanned aerial vehicle arm; the bottom of the unmanned aerial vehicle is connected with a pull pressure sensor through a hook. The unmanned aerial vehicle can adapt to multi-rotor unmanned aerial vehicles and light and small fixed-wing unmanned aerial vehicles of various models.

Description

Technical Field

[0001] The present invention relates to the technical fields of static testing of unmanned aerial vehicle (UAV) structural strength, verification of strength applicable range, and the like, and in particular to a universal detection device for the structural strength of unmanned aerial vehicles (UAVs). Background Art

[0002] Structural strength is a basic indicator of UAVs and a key requirement of the mandatory standard. In order to build the capability of this test, it is necessary to comprehensively consider various configurations, sizes, stress-bearing parts and load mounting methods of UAVs, design and manufacture a strength test platform with flexible extension, non-destructive fixation and equipped with a quantitative tension device, and then conduct standardized tests on the UAV structure to verify its compliance with the mandatory standard. At present, there are also some related testing methods and equipment for the inspection and testing of the structural strength of light and small UAVs. Although each has some characteristics and advantages, using them as general testing equipment for light and small UAVs cannot meet the current standards and industry requirements in terms of accuracy, scope of application and ease of use. Summary of the invention

[0003] In view of this, the present invention proposes a universal detection device for the structural strength of an unmanned aerial vehicle, which can be adapted to various models of multi-rotor unmanned aerial vehicles and light and small fixed-wing unmanned aerial vehicles.

[0004] Based on the above purpose, the technical solution of the present invention is:

[0005] A general detection device for the structural strength of an unmanned aerial vehicle comprises a structural platform 1, a test platform 2 and a push pressure lifting rod 5; the test platform is located at the top of the structural platform; the push pressure lifting rod is located at the center of the test platform, and a pull pressure sensor is provided at the middle position of the top of the test platform;

[0006] In the hanging installation state: it also includes a hanging frame 3 for support and a sliding adjustable structure 9 for facilitating hanging; the sliding adjustable structure is supported by the hanging frame and is located directly above the test bench, the drone arm is hung on the sliding adjustable structure, and the bottom of the drone is connected to the tension and pressure sensor through a hook;

[0007] In the support installation state, the test bench is also provided with a plurality of telescopic support rods, and the telescopic support rod array is around the push pressure lifting rod; the telescopic support rod serves as a support, and its top supports the drone arm; the bottom of the drone is connected to the pull pressure sensor through a hook.

[0008] Furthermore, the suspension frame includes a support rod and a crossbeam arranged on the support rod; the bottom end of the support rod is connected to the edge of the structural platform; the tops of adjacent support rods are connected by a crossbeam to form a rectangular frame; the sliding adjustable structure includes a longitudinal beam mounted on the crossbeam and a hook installed on the longitudinal beam;

[0009] The cross beam is provided with a transverse T-shaped slot, and both ends of the longitudinal beam are provided with a bending portion, and the bending portion is directly opposite to the transverse T-shaped slot; an inverted bolt is provided in the transverse T-shaped slot, the bolt passes through the bending portion and is locked by a nut; the bolt has the freedom to move in the transverse T-shaped slot;

[0010] The longitudinal beam is provided with a longitudinal T-shaped groove, and a sliding block is arranged in the longitudinal T-shaped groove; the top of the hook is threadedly connected with the sliding block located in the T-shaped groove.

[0011] Furthermore, the telescopic support rod includes a magnetic seat 41 with a rubber gasket, a bamboo support rod 42 of a specific length, a pressure sensor 43 and a drone support component 44;

[0012] The magnetic seat is located at the bottom of the bottom bamboo support rod, and the top of the top bamboo support rod is installed with the drone support component; the pressure sensor 43 is located between the drone support component and the bamboo support rod;

[0013] The magnetic seat 41 with a rubber gasket can be adsorbed at any position on the test bench according to the number and size of the UAV rotors, and scratches on the test bench can be prevented during adsorption; the support component 44 is in contact with the main load-bearing parts of the tested UAV to provide support during the test; the number of bamboo support rods 42 is selected according to the height of the tested UAV, and they are connected section by section to form the overall height of the support rods. A pressure sensor can also be connected between any two adjacent bamboo support rods for pressure measurement and recording during the test.

[0014] Furthermore, the test bench surface 51 is made of stainless steel, and is provided with concentric circle marks 52 for auxiliary positioning, a sensor jack 53 and a lifting rod through hole 54. The concentric circle marks 52 are used to symmetrically set the support rod magnetic seat installation position according to the number and size of the rotors of the tested drone during use; the lifting rod through hole 54 is used to fix the pushing force lifting rod, and the bottom end of the pushing force lifting rod is located in the corresponding lifting rod through hole 54.

[0015] A method for detecting a general detection device for the structural strength of a UAV is implemented by the general detection device for the structural strength of a UAV mentioned above; including manual testing and automatic testing;

[0016] The specific process of manual testing is as follows: the user controls the movement of the push pressure lifting rod through the up / down button on the control interface. The push pressure lifting rod can rise or fall if the upper / lower limit is not reached; click the reset button, and the push rod moves to the initial position;

[0017] The specific process of automatic testing is as follows: first set the tension / pressure parameters, then start the test. If the current tension / pressure has not reached the limit and the current value is less than the set value and the tension / pressure collection is normal, push the pressure lifting rod to continue to move downward until the tension / pressure value reaches the set value.

[0018] Furthermore, in order to compensate for the tension / pressure deviation caused by the elastic deformation of the mechanical structure and the fixed structure of the drone, dynamic compensation logic is introduced to continuously collect tension / pressure data for dynamic adjustment of the motion device until the end of the test. If the push rod reaches the lower limit before the end of the test or the tension / pressure collection is abnormal, the test will be terminated immediately.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The present invention has a simple structure, is easy to implement, has low cost, and is convenient for popularization and application.

[0021] 2. The installation of the present invention adopts tool-free barehand operation, which is easy to use, the tested UAV is installed firmly, and there is no risk of damage to the tested UAV body during installation.

[0022] 3. The present invention can be installed in a hanging or supporting manner according to the characteristics of the drone model and size. Both methods have flexible size and height adjustment functions and are adaptable to more models and sizes.

[0023] 4. The present invention has tabletop expandability. For models that exceed the current tabletop size, the tabletop can also be expanded to meet the needs, so that the device has certain expandability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to describe this patent more clearly, several drawings are provided below, which are intended to assist in explaining the background technology, technical principles and / or certain specific implementation plans of this patent.

[0025] Figure 1 This is a schematic diagram of the overall structure suitable for supporting and installing a drone in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure suitable for the suspension installation of a drone in an embodiment of the present invention;

[0027] Figure 3 This is a structural diagram of the degree of freedom adjustment of the suspension stand in an embodiment of the present invention;

[0028] Figure 4 This is a structural diagram of an automatically retractable support rod in an embodiment of the present invention;

[0029] Figure 5 This is a structural diagram of a test table in an embodiment of the present invention;

[0030] Figure 6 is an operation and workflow diagram in an embodiment of the present invention;

[0031] Figure 7This is a display diagram of the control interface in an embodiment of the present invention;

[0032] Figure 8 It is an electrical control flow chart in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] In order to facilitate technical personnel in this field to understand the technical solution of this patent, and at the same time, to make the technical purpose, technical solution and beneficial effects of this patent clearer and to fully support the scope of protection of the claims, the technical solution of this patent is further and more detailedly explained in the form of specific cases.

[0035] The general testing device for the structural strength of unmanned aerial vehicles comprises a structural platform 1, a test platform 2, a suspension frame 3, a telescopic support rod 4, a push pressure lifting rod 5, a control panel 6, a pull pressure sensor 7, a connecting hook 8, a sliding adjustable structure 9, a hanging rope 10, an emergency switch 11 and a prototype of the unmanned aerial vehicle to be tested 12. Provide a suspension according to the type of unmanned aerial vehicle to be tested (such as Figure 1 ) and support (such as Figure 2 ) two installation methods, the test models cover all multi-rotor models with a wheelbase of less than 1.0 meter and fixed-wing models with a wingspan of less than 1.0 meter.

[0036] like Figure 3 As shown, the suspension table comprises a crossbeam 31, a longitudinal beam 32 and a hook 33, and the longitudinal beam 32 can move freely in two directions along the edge crossbeam 31. Similarly, multiple hooks 33 can move freely in two directions along the longitudinal beam 32, so that the crossbeam 32 and the hook 33 slide along two vertical axes to cover the mounting points of the entire area under the suspension table, thereby realizing the test installation of drones of different configurations and sizes and increasing applicability.

[0037] like Figure 4 As shown, considering that some drones are not suitable for hanging installation, but suitable for bottom support installation, the automatic telescopic support rod described in this device includes a magnetic seat 41 with a rubber gasket, a bamboo support rod 42 of fixed length, a pressure sensor 43 and a drone support component 44. The magnetic seat 41 with a rubber gasket can be adsorbed at any position on the experimental table according to the number and size of the drone rotors, and the table can be prevented from being scratched during adsorption; the drone support component 44 contacts the main load-bearing part of the tested drone to provide support during the test; the number of bamboo support rods 42 is selected according to the height of the tested drone, and they are connected section by section to form the overall height of the support rod. A pressure sensor can also be connected between any two sections for pressure measurement and recording in automatic testing.

[0038] like Figure 5 As shown, the test table 51 is preferably made of stainless steel with higher strength. The table includes concentric circle marks 52 for auxiliary positioning, sensor sockets 53 and automatic lifting rod holes 54. The concentric circle marks 52 are used to symmetrically set the support rod magnetic seat installation position according to the number and size of the rotors of the tested drone during use; there are a total of 8 sensor sockets 53, which can currently measure the structural strength of up to octarotor drones. They are connected to the control center under the table, and the sensing line is inserted in the sensor socket; the lifting rod hole 54 is a motor-driven lifting rod with a 4-hole design to ensure stability during the lifting process.

[0039] like Figure 6 The device can be operated in two modes: manual and automatic. In manual operation, the user can control the Figure 7 ) The up / down button controls the movement of the push rod. The push rod can rise or fall if the upper / lower limit is not reached; click the reset button and the push rod moves to the initial position. During automatic testing, set the parameters first, click the start button to start the test. If the current tension / pressure has not reached the limit and the current tension value is less than the set value and the tension / pressure collection is normal, the push rod continues to move downward until the tension / pressure value reaches the set value. In order to compensate for the tension / pressure application deviation caused by the structural deformation of the mechanical structure and the fixed position of the drone, this device introduces dynamic compensation logic, continuously collects tension / pressure data and analyzes its change according to the motion device. When the deformation produces an abnormal tension / pressure change, the motion device is driven by real-time feedback to perform dynamic adjustment to ensure the accuracy of the final displayed tension / pressure value until the end of the test. If the push rod reaches the lower limit before the end of the test or the tension / pressure collection is abnormal, the test will be terminated immediately. All of the above operations can also be terminated by clicking the stop button or pressing the emergency switch.

[0040] like Figure 8 , 8-way tension / pressure sensors are integrated, and the collection and restoration of sensor data, the execution feedback of motors and other components, and the input and presentation of touch screens are organized through a unified main controller to achieve accurate measurement under multiple accuracies and flexible conversion of multiple measurement methods. The LCD touch screen is preferably used to provide a convenient human-computer interaction control interface, such as Figure 7As shown, it provides functions including parameter setting, sensor calibration, and automated measurement / viewing. On the other hand, the real-time measurement data is nonlinearly associated with the motion execution process of the stepper motor, and the movement speed and applied force of the push device are accurately controlled in real time with the help of dynamic feedback, so as to achieve a two-way balance between operating speed and control accuracy. When the measured tension / pressure data is extremely small or close to 0, the main control drives the push device to run at high speed. As the tension / pressure measurement value increases, the main control quickly reduces the running speed of the push device to increase the torque, and gradually reduces the running speed of the push device to 0 as the measured value approaches the set value. In addition, the device uses limit sensors for position feedback monitoring to monitor the position of the device in real time to ensure the safety and reliability of the experimental process.

[0041] In short, this detection device is suitable for multi-rotor drones with a motor wheelbase less than 1.2 meters and fixed-wing or vertical take-off and landing fixed-wing drones with a wingspan less than 1.2 meters, providing third-party quantitative detection equipment for their structural strength. However, it should be noted that for multi-rotor or fixed-wing models with a size exceeding 1.2 meters, the table top can be expanded and extended to provide support points for the telescopic support rod, which can also provide quantitative detection of structural strength. On the other hand, because the sensor can be flexibly adapted, the measurement range is adjustable, so the scope of application of this detection device is wider.

[0042] It should be understood that the above description of the specific implementation methods of this patent is only an exemplary description listed to facilitate ordinary technicians in the field to understand the patent scheme, and does not imply that the scope of protection of this patent is limited to these individual examples. Ordinary technicians in this field can fully understand the technical scheme of this patent and, without any creative work, obtain more specific implementation methods by combining technical features, replacing some technical features, adding more technical features, etc. to the examples listed in this patent. All these specific implementation methods are within the scope of the claims of this patent. Therefore, these new specific implementation methods should also be within the scope of protection of this patent.

[0043] In addition, for the purpose of simplifying the description, this patent may not list some common specific implementation schemes, which are naturally conceivable to ordinary technicians in this field after understanding the technical solution of this patent. Obviously, these solutions should also be included in the scope of protection of this patent.

[0044] For the purpose of simplifying the description, the disclosure of the technical details in the above-mentioned specific implementations may only reach the extent that those skilled in the art can decide on their own, that is, for the technical details not disclosed in the above-mentioned specific implementations, ordinary technicians in this field can completely complete them with the help of textbooks, reference books, papers, patents, audio-visual products and other published documents without any creative work, under the full prompts of the technical solution of this patent, or these details are the content that ordinary technicians in this field can decide on their own according to actual conditions under the common understanding. It can be seen that even if these technical details are not disclosed, it will not affect the sufficiency of the disclosure of the technical solution of this patent.

[0045] In short, based on the interpretation of the scope of protection of the claims by this patent specification, any specific implementation scheme that falls within the scope of the claims of this patent is within the scope of protection of this patent.

Claims

1. A universal detection device for the structural strength of an unmanned aerial vehicle, characterized in that: It comprises a structural platform (1), a test platform (2) and a push pressure lifting rod (5); the test platform is located at the top of the structural platform; the push pressure lifting rod is located at the center of the test platform, and a pull pressure sensor is provided at the middle position of the top of the test platform; In the hanging installation state: it also includes a hanging frame (3) for supporting and a sliding adjustable structure (9) for facilitating hanging; the sliding adjustable structure is supported by the hanging frame and is located directly above the test bench, the drone arm is hung on the sliding adjustable structure, and the bottom of the drone is connected to the tension and pressure sensor via a hook; In the support installation state, the test bench is also provided with a plurality of telescopic support rods, and the telescopic support rod array is around the push pressure lifting rod; the telescopic support rod serves as a support, and its top supports the drone arm; the bottom of the drone is connected to the pull pressure sensor through a hook.

2. The general detection device for the structural strength of an unmanned aerial vehicle according to claim 1, characterized in that: The suspension frame includes a support rod and a crossbeam arranged on the support rod; the bottom end of the support rod is connected to the edge of the structural platform; the tops of adjacent support rods are connected by a crossbeam to form a rectangular frame; the sliding adjustable structure includes a longitudinal beam mounted on the crossbeam and a hook installed on the longitudinal beam; The cross beam is provided with a transverse T-shaped slot, and both ends of the longitudinal beam are provided with a bending portion, and the bending portion is directly opposite to the transverse T-shaped slot; an inverted bolt is provided in the transverse T-shaped slot, the bolt passes through the bending portion and is locked by a nut; the bolt has the freedom to move in the transverse T-shaped slot; The longitudinal beam is provided with a longitudinal T-shaped groove, and a slider is provided in the longitudinal T-shaped groove; the top of the hook is threadedly connected with the slider in the T-shaped groove; The drone arm is connected to the hook via a lanyard.

3. The universal detection device for the structural strength of an unmanned aerial vehicle according to claim 1, characterized in that: The telescopic support rod comprises a magnetic seat (41) with a rubber gasket, a bamboo support rod (42) of a specific length, a pressure sensor (43) and a drone support component (44); The magnetic seat is located at the bottom of the bottom bamboo support rod, and the top of the top bamboo support rod is installed with a drone support component; the pressure sensor (43) is located between the drone support component and the bamboo support rod; The magnetic suction seat (41) with a rubber gasket can be adsorbed at any position on the test table according to the number and size of the UAV rotors, and scratches on the test table can be prevented during adsorption; the support component (44) is in contact with the main load-bearing parts of the UAV under test to provide support during the test; the number of bamboo support rods (42) is selected according to the height of the UAV under test, and the bamboo support rods are connected section by section to form the overall height of the support rods, and a pressure sensor can be connected between any two adjacent bamboo support rods for pressure measurement and recording during the test.

4. The universal detection device for the structural strength of an unmanned aerial vehicle according to claim 1, characterized in that: The test bench (51) is made of stainless steel and is provided with concentric circle marks (52) for auxiliary positioning, a sensor jack (53) and a lifting rod through hole (54). The concentric circle marks (52) are used to symmetrically set the support rod magnetic suction seat installation position according to the number and size of the rotors of the tested UAV during use; the lifting rod through hole (54) is used to fix the pushing force lifting rod, and the bottom end of the pushing force lifting rod is located in the corresponding lifting rod through hole (54).

5. A method for detecting a general detection device for the structural strength of an unmanned aerial vehicle, characterized in that: It is achieved by a general detection device for the structural strength of a UAV as described in any one of claims 1 to 4; including manual testing and automatic testing; The specific process of manual testing is as follows: the user controls the movement of the push pressure lifting rod through the up / down button on the control interface. The push pressure lifting rod can rise or fall if the upper / lower limit is not reached; click the reset button, and the push rod moves to the initial position; The specific process of automatic testing is as follows: first set the tension / pressure parameters, then start the test. If the current tension / pressure has not reached the limit and the current value is less than the set value and the tension / pressure collection is normal, push the pressure lifting rod to continue to move downward until the tension / pressure value reaches the set value.

6. The detection method of the general detection device for the structural strength of unmanned aerial vehicles according to claim 5 is characterized in that: In order to compensate for the tension / pressure deviation caused by the elastic deformation of the mechanical structure and the fixed structure of the drone, dynamic compensation logic is introduced to continuously collect tension / pressure data for dynamic adjustment of the motion device to ensure the accuracy of the tension / pressure measurement results until the end of the test. If the push rod reaches the lower limit before the end of the test or the tension / pressure collection is abnormal, the test will be terminated immediately.

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