High-altitude resistance detection device

Abstract

The invention discloses a high-altitude resistance detection device, which relates to the technical field of wind power detection and comprises a lifting mechanism, a host, a detection mechanism and an adsorption mechanism, comprising a first rope winding device, a second rope winding device, a connecting rope and a rope frame, one end of the connecting rope is stored in the first rope winding device, the other end of the connecting rope is stored in the second rope winding device, the first rope winding device and the second rope winding device are used for being fixed to the two sides of the unmanned aerial vehicle, the first rope winding device comprises a first motor for driving rope winding, and the second rope winding device adopts a constant-force contractor; the rope frame is fixed to the upper end of the main machine. The middle of the connecting rope penetrates through the rope frame. The detection mechanism comprises a mechanical arm assembly, a needle frame assembly and a probe, the mechanical arm assembly is connected to the side face of the main machine, the needle frame assembly is connected to one end of the needle frame assembly, and the probe is installed on the needle frame assembly and used for making contact with the detection resistor; the adsorption mechanism is arranged at the lower end of the host. The device can be carried on the unmanned aerial vehicle so as to detect the resistance of the lightning arrester, and meanwhile, the air crash caused by winding the unmanned aerial vehicle by a rope can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power detection, and in particular relates to a high-altitude resistance detection device. Background Art

[0002] With the rapid development of renewable energy, wind power generation has been widely promoted and applied around the world. However, lightning has a strong destructive power on wind turbines, so lightning protection for wind turbines is particularly important. At present, multiple lightning rods are installed on the blades at intervals to avoid lightning strikes. According to industry standards, the grounding resistance of the lightning rod is required to be less than 50m Ω. Since the lightning rod is in a harsh environment for a long time, there is a possibility of failure. In order to ensure the safety of the wind turbine, the grounding resistance of the lightning rod needs to be regularly tested and repaired. In traditional testing, the blade to be tested needs to be hit in a vertical position, and then the maintenance personnel are lifted by the construction hanging basket. The maintenance personnel then connect the test line to the lightning rod for testing. There are certain risks in high-altitude work and accidents are prone to occur.

[0003] Therefore, a method of using a drone equipped with a detection line to detect the resistance of a lightning rod has emerged in the prior art. For example, patent CN216429837U discloses a wind turbine blade lightning protection conduction test system, which sets a mechanical arm on the drone, connects the mechanical arm to one terminal of a resistance tester through a test wire, and connects the other terminal of the resistance tester to the grounding terminal of the wind turbine through the test wire; connects the mechanical arm and the drone through a rope, so that the mechanical arm is lifted to the vicinity of the lightning rod, and the mechanical arm is clamped on the lightning rod to form a complete test loop from the lightning rod to the grounding terminal.

[0004] Due to the change in speed during the take-off phase of the drone and the influence of factors such as strong winds during the hovering test phase of the drone, the rope may be entangled with the drone, causing the drone to crash. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a high-altitude resistance detection device which can be carried on a drone to detect the resistance of a lightning arrester and prevent the drone from crashing due to the entanglement of ropes.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] A high-altitude resistance detection device includes a lifting mechanism, a main machine, a detection mechanism and an adsorption mechanism; it includes a first rope collector, a second rope collector, a connecting rope and a rope rack, one end of the connecting rope is received in the first rope collector, and the other end of the connecting rope is received in the second rope collector, the first rope collector and the second rope collector are used to be fixed on both sides of a drone, the first rope collector includes a first motor for driving the rope collection, and the second rope collector adopts a constant force retractor; the rope rack is fixed to the upper end of the main machine, and the middle part of the connecting rope passes through the rope rack; the detection mechanism includes a mechanical arm assembly, a needle rack assembly and a probe, the mechanical arm assembly is connected to the side of the main machine, the needle rack assembly is connected to one end of the needle rack assembly, and the probe is installed on the needle rack assembly for contact detection resistance; the adsorption mechanism is arranged at the lower end of the main machine.

[0008] Furthermore, the rope rack includes a support leg, a rope drum and a guide wheel. The support leg includes two legs, which are respectively fixed on both sides of the upper end of the main machine. The rope drum is horizontally installed on the upper end of the support leg. The guide wheel includes two wheels, which are respectively rotatably connected to the two ends of the rope drum. The connecting rope passes through the rope drum and bypasses the two guide wheels.

[0009] Furthermore, the first rope collector also includes a storage box and a rope pulley, the rope pulley is rotatably connected to the storage box, the first motor is connected to the rope pulley, one end of the connecting rope is inserted into the storage box and wound around the rope pulley.

[0010] Furthermore, a power supply spring rope is arranged in the middle of the upper end of the main machine, and a balance frame is arranged at the upper end of the power supply spring rope. The balance frame is used to be fixed on the drone, and the upper end of the power supply spring rope is used to connect the ground detection cable.

[0011] Furthermore, the robotic arm assembly includes a mobile robotic arm, an arm base and a second motor. The arm base is fixed on the main machine, the mobile robotic arm is movably connected to the arm base, the second motor is fixed on the arm base, the mobile robotic arm is provided with a rack along the length direction, the second motor is connected to a gear, and the gear and the rack are meshingly connected.

[0012] Furthermore, the needle holder assembly includes a servo, a carbon rod and a chuck. The servo is fixed at one end of the mobile robotic arm. The chuck is connected to the carbon rod. The carbon rod is fixed to the chuck. A fourth motor is provided at one end of the carbon rod. The fourth motor is connected to the probe. A camera is fixedly connected to the other end of the carbon rod.

[0013] Furthermore, the adsorption mechanism includes a suction cup and a negative pressure pump. There are several suction cups distributed on the circumference of the lower end of the main machine. The negative pressure pump and the suction cup are connected through an electromagnetic valve.

[0014] Furthermore, a rotating seat is arranged at the lower end of the main machine, and the suction cups are evenly connected to the rotating seat. A third motor is arranged in the main machine, and the third motor and the rotating seat are connected through a transmission wheel set.

[0015] Furthermore, it also includes a remote control system, which includes a sky end and a ground end. The ground end is used for ground personnel to operate, and the sky end and the ground end are communicatively connected.

[0016] Furthermore, the sky end includes an image transmission module and a digital transmission module, and both the image transmission module and the digital transmission module are arranged inside the host.

[0017] The beneficial effects of the present invention are:

[0018] 1. The lifting mechanism is connected to the main machine through the drone, and the lifting mechanism is connected to the main machine. A detection mechanism including a mechanical arm assembly, a needle holder assembly and a probe is set on the main machine, and an adsorption mechanism is set at the lower end of the main machine. The resistance of the lightning detector can be detected by the detection mechanism carried by the drone, and there is no need to lift the maintenance personnel for high-altitude operations, thereby avoiding accidents.

[0019] 2. By setting the first rope collector and the second rope collector, they can be connected to the main machine through the rope rack. During the ascending stage of the drone, the first rope collector and the second rope collector collect the connecting rope, which is helpful to prevent the connecting rope from being entangled in the drone and avoid crashing.

[0020] 3. Since the first rope retractor includes a first motor for driving the rope retractor, the first rope retractor can actively retract the rope, and the second rope retractor adopts a constant force retractor to maintain the tension of the connecting rope. During the process of retracting and releasing the rope and the hovering test, it is helpful to prevent the connecting rope from being too loose and entangled with the drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention installed on a drone.

[0022] Figure 2 It is a schematic structural diagram of an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 Schematic diagram of the host structure.

[0024] Figure 4 yes Figure 2 Schematic diagram of the structure of the robotic arm assembly.

[0025] Figure 5 yes Figure 2 Schematic diagram of the structure of the middle rope rack.

[0026] Figure 6 yes Figure 2 Exploded view of the first rope collector.

[0027] Figure 7 yes Figure 2 Exploded view of the mainframe.

[0028] Figure 8It is a circuit connection diagram of the remote control system of the present invention.

[0029] Numbers in the figure: 1. UAV; 2. Connecting rope; 3. Power supply spring rope; 4. Ground detection cable; 5. Main unit; 6. Adsorption mechanism; 61. Suction cup; 62. Negative pressure pump; 7. Robotic arm assembly; 71. Arm seat; 72. Mobile robot arm; 73. Second motor; 74. Rack; 75. Gear; 8. Needle holder assembly; 81. Servo; 82. Chuck; 83. Carbon rod; 84. Camera; 9. First rope collector; 91. Storage box; 92. Rope pulley; 93. First motor; 10. Second rope collector; 11. Balance frame; 12. Rotating seat; 13. Rope holder; 131. Rope drum; 132. Leg; 133. Guide wheel; 14. Image transmission module; 15. Digital transmission module; 16. Third motor; 17. Probe. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figures 1 to 8 As shown, the high-altitude resistance detection device of this embodiment includes a lifting mechanism, a main unit 5, a detection mechanism and an adsorption mechanism 6, wherein the lifting mechanism is used to drive the main unit 5 to move up and down, the adsorption mechanism 6 can be adsorbed on the fan blades, and the detection mechanism can contact the lightning arrester on the blades to measure the resistance.

[0032] The lifting mechanism includes a first rope collector 9, a second rope collector 10, a connecting rope 2 and a rope rack 13. One end of the connecting rope 2 is stored in the first rope collector 9, and the other end of the connecting rope 2 is stored in the second rope collector 10. The first rope collector 9 and the second rope collector 10 are used to be fixed on both sides of the drone 1. The first rope collector 9 includes a first motor 93 for driving the rope collection, and includes a storage box 91 and a rope wheel 92. The rope wheel 92 is rotatably connected to the storage box 91. The first motor 93 is connected to the rope wheel 92. One end of the connecting rope 2 is inserted into the storage box 91 and wound on the rope wheel 92. The rope wheel 92 can be driven to rotate by the first motor 93, thereby. The second rope collector 10 adopts a constant force retractor. Specifically, the second rope collector 10 is also provided with a motor for driving the rope collection. A constant force sensor is provided on the motor to detect the tension of the connecting rope 2, so as to maintain a certain tension of the connecting rope 2 when the rope is collected and released, thereby maintaining the balance of the two sides of the connecting rope 2.

[0033] The middle part of the connecting rope 2 is connected to the main machine 5. In order to maintain balance, a rope rack 13 is fixedly set at the upper end of the main machine 5. The middle part of the connecting rope 2 passes through the rope rack 13, so that there is a certain distance between the connecting ropes 2 to prevent the two ends of the connecting rope 2 from being entangled with each other. Specifically, the rope rack 13 includes a support leg 132, a rope drum 131 and a guide wheel 133. The support leg 132 includes two, which are respectively fixed on both sides of the upper end of the main machine 5. The rope drum 131 is horizontally installed on the upper end of the support leg 132. The guide wheel 133 includes two, which are rotatably connected to the two ends of the rope drum 131. The connecting rope 2 passes through the rope drum 131 and bypasses the two guide wheels 133. The guide wheel 133 is set at the turning point of the connecting rope 2 to reduce the wear of the connecting rope 2 and extend its service life.

[0034] A power supply spring rope 3 is arranged in the middle of the upper end of the main machine 5, and a balance frame 11 is arranged at the upper end of the power supply spring rope 3. The balance frame 11 is used to be fixed on the drone, and the upper end of the power supply spring rope 3 is used to connect the ground detection cable 4. By setting the balance frame 11 to connect the power supply spring rope 3 and the ground detection cable 4, it is beneficial to maintain balance.

[0035] The detection mechanism includes a mechanical arm assembly 7, a needle frame assembly 8 and a probe 17. The mechanical arm assembly 7 is connected to the side of the host 5, the needle frame assembly 8 is connected to one end of the needle frame assembly 8, and the probe 17 is installed on the needle frame assembly 8 for contact detection resistance. Specifically, the mechanical arm assembly 7 includes a mobile mechanical arm 72, an arm seat 71 and a second motor 73. The arm seat 71 is fixed on the host 5, the mobile mechanical arm 72 is movably connected to the arm seat 71, and the second motor 73 is fixed on the arm seat 71. The mobile mechanical arm 72 is provided with a rack 74 along the length direction, and the second motor 73 is connected to a gear 75, and the gear 75 and the rack 74 are meshed and connected. The gear 75 is driven to rotate by the second motor 73, and the rack 74 is driven to move linearly, so that the mobile mechanical arm 72 is extended and retracted, and finally the needle frame assembly 8 is close to the lightning receptor position.

[0036] The needle holder assembly 8 includes a steering gear 81, a carbon rod 83 and a chuck 82. The steering gear 81 is fixed at one end of the mobile mechanical arm 72. The chuck 82 is connected to the carbon rod 83. The carbon rod 83 is fixed on the chuck 82. A fourth motor (not shown) is provided at one end of the carbon rod 83. The fourth motor (not shown) is connected to the probe 17. The fourth motor (not shown) drives the probe 17 to rotate, which can polish the lightning receptor and remove the oxide film on the surface of the lightning receptor, so that the measurement value is more accurate. A camera 84 is fixedly connected to the other end of the carbon rod 83. The steering gear 81 can rotate to drive the probe 17 to rotate and contact the lightning receptor. The camera 84 is provided to facilitate observation of the probe 17. The power supply spring rope 3 is connected to the probe 17 through a wire, so that the ground detection cable 4 and the probe 17 are connected, so as to facilitate the measurement of the lightning receptor resistance.

[0037] The adsorption mechanism 6 is arranged at the lower end of the main unit 5. The adsorption mechanism 6 includes a suction cup 61 and a negative pressure pump 62. The suction cup 61 includes several suction cups distributed on the circumference of the lower end of the main unit 5. The negative pressure pump 62 and the suction cup 61 are connected through an electromagnetic valve (not shown). After starting the negative pressure pump 62, the electromagnetic valve is opened, so that the negative pressure pump 62 generates suction, thereby adsorbing on the surface of the fan blade.

[0038] A rotating seat 12 is arranged at the lower end of the main machine 5, and suction cups 61 are evenly connected to the rotating seat 12. A third motor 16 is arranged in the main machine 5, and the third motor 16 and the rotating seat 12 are connected through a transmission wheel group. When the suction cup 61 is adsorbed on the blade, the third motor 16 rotates, thereby driving the main machine 5 to rotate, adjusting the angle of the mechanical arm assembly 7, so as to facilitate the contact between the probe 17 and the lightning receptor. Among them, the transmission wheel group includes a gear ring installed on the rotating seat 12, the gear ring is coaxial with the rotating seat 12 and the main machine 5, and a gear meshing with the gear ring is arranged on the third motor 16.

[0039] like Figure 8 As shown, the high-altitude resistance detection device of this embodiment also includes a remote control system, which includes a sky end and a ground end, the ground end is used for ground personnel operation, and the sky end and the ground end are connected in communication. Among them, the sky end includes an image transmission module 14 and a digital transmission module 15, and the image transmission module 14 and the digital transmission module 15 are both arranged inside the host 5. In addition, the sky end is connected with a current sensor, an angle sensor, a Hall sensor, a photoelectric encoder and a laser ranging sensor through an MCU, and the MCU is connected with a steering gear 81, a negative pressure pump 62, a first motor 93, a second motor 73, a third motor 16, a fourth motor and an electromagnetic valve through a drive circuit, wherein the MCU is used to process the data received by the sky end, and drive each actuator to work through a drive circuit. The angle sensor is installed on the host 5, and when the adsorption mechanism 6 is adsorbed on the blade, the inclination angle and shaking degree of the blade can be detected. The Hall sensor is installed at both ends of a certain mobile mechanical arm 72, and controls the mobile mechanical arm 72 to move forward and backward and stop after reaching the end. The photoelectric encoder is installed on the first motor 93 and can measure the length of the retractable connecting rope 2. The laser distance meter is installed at the lower end of the mobile mechanical arm 72 and can measure the height of the mobile mechanical arm 72 from the blade.

[0040] During operation, after the drone 1 rises to a certain height, the first motor 93 is controlled to rotate, the connecting rope 2 is released, and the host 5 moves downward. When it reaches the vicinity of the blade lightning receptor, the negative pressure pump 62 is operated to make the suction cup 61 adsorb on the blade, and then the third motor 16 rotates to drive the host 5 and the mobile mechanical arm 72 to rotate toward the lightning receptor, and then the carbon rod 83 is driven to rotate by the steering gear 81, so that the probe 17 contacts the lightning receptor, thereby measuring the resistance of the lightning receptor. After the measurement is completed, the negative pressure pump 62 is controlled to stop, and after the suction cup 61 is separated from the blade, it is rotated by the first motor 93 to store the connecting rope 2, which is conducive to preventing the connecting rope 2 from being entangled with the drone 1 during the flight of the drone 1 and preventing the drone from crashing.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high altitude resistance detection device, characterized in that: include: A lifting mechanism comprises a first rope collector (9), a second rope collector (10), a connecting rope (2) and a rope rack (13), one end of the connecting rope (2) is received in the first rope collector (9), and the other end of the connecting rope (2) is received in the second rope collector (10), the first rope collector (9) and the second rope collector (10) are used to be fixed on both sides of the drone, the first rope collector (9) comprises a first motor (93) for driving the rope collection, and the second rope collector (10) adopts a constant force retractor; A main machine (5), the rope rack (13) is fixed to the upper end of the main machine (5), and the middle part of the connecting rope (2) passes through the rope rack (13); A detection mechanism, the detection mechanism comprising a mechanical arm assembly (7), a needle frame assembly (8) and a probe (17), the mechanical arm assembly (7) being connected to a side of the host (5), the needle frame assembly (8) being connected to one end of the needle frame assembly (8), and the probe (17) being mounted on the needle frame assembly (8) and used for contact detection resistance; An adsorption mechanism (6), wherein the adsorption mechanism (6) is arranged at the lower end of the main machine (5).

2. The high-altitude resistance detection device according to claim 1, characterized in that: The rope rack (13) comprises a support leg (132), a rope drum (131) and a guide wheel (133). The support leg (132) comprises two, which are respectively fixed on both sides of the upper end of the main machine (5). The rope drum (131) is horizontally installed on the upper end of the support leg (132). The guide wheel (133) comprises two, which are respectively rotatably connected to the two ends of the rope drum (131). The connecting rope (2) passes through the rope drum (131) and bypasses the two guide wheels (133).

3. The high altitude resistance detection device according to claim 1, characterized in that: The first rope collector (9) also includes a storage box (91) and a rope wheel (92), the rope wheel (92) is rotatably connected to the storage box (91), the first motor (93) is connected to the rope wheel (92), one end of the connecting rope (2) is inserted into the storage box (91) and wound around the rope wheel (92).

4. The high-altitude resistance detection device according to claim 3 is characterized in that: A power supply spring rope (3) is arranged at the middle of the upper end of the main machine (5), a balance frame (11) is arranged at the upper end of the power supply spring rope (3), the balance frame (11) is used to be fixed on the drone, and the upper end of the power supply spring rope (3) is used to connect to a ground detection cable.

5. The high-altitude resistance detection device according to claim 1, characterized in that: The mechanical arm assembly (7) comprises a mobile mechanical arm (72), an arm base (71) and a second motor (73); the arm base (71) is fixed on the main machine (5); the mobile mechanical arm (72) is movably connected to the arm base (71); the second motor (73) is fixed on the arm base (71); the mobile mechanical arm (72) is provided with a rack (74) along the length direction; the second motor (73) is connected to a gear (75); the gear (75) and the rack (74) are meshingly connected.

6. The high-altitude resistance detection device according to claim 5, characterized in that: The needle holder assembly (8) includes a servo (81), a carbon rod (83) and a chuck (82), wherein the servo (81) is fixed to one end of the mobile mechanical arm (72), the chuck (82) and the carbon rod (83) are connected, the carbon rod (83) is fixed to the chuck (82), a fourth motor is provided at one end of the carbon rod (83), the fourth motor is connected to the probe (17), and a camera (84) is fixedly connected to the other end of the carbon rod (83).

7. The high altitude resistance detection device according to claim 1, characterized in that: The adsorption mechanism (6) comprises a suction cup (61) and a negative pressure pump (62). The suction cup (61) comprises a plurality of suction cups distributed on the circumference of the lower end of the main machine (5). The negative pressure pump (62) and the suction cup (61) are connected via a solenoid valve.

8. The high altitude resistance detection device according to claim 7, characterized in that: A rotating seat (12) is arranged at the lower end of the main machine (5), and the suction cups (61) are evenly connected to the rotating seat (12). A third motor (16) is arranged inside the main machine (5), and the third motor (16) and the rotating seat (12) are connected via a transmission wheel set.

9. The high altitude resistance detection device according to claim 1, characterized in that: It also includes a remote control system, which includes a sky end and a ground end. The ground end is used for ground personnel to operate, and the sky end and the ground end are communicatively connected.

10. The high-altitude resistance detection device according to claim 9, characterized in that: The sky end comprises an image transmission module (14) and a digital transmission module (15), and the image transmission module (14) and the digital transmission module (15) are both arranged inside the host (5).

Images