Telescopic magnetic detection sleeve structure of unmanned aerial vehicle

Abstract

The invention provides a telescopic magnetic detection sleeve structure of an unmanned aerial vehicle. The telescopic magnetic detection sleeve structure comprises a driving and recycling structure, a locking structure, an auxiliary stretching structure and a power failure protection structure, wherein the driving and recycling structure is composed of a motor, a motor shaft, a coil spring, a winch and an ultra-high molecular weight polyethylene rope Dyneema stay wire; the locking structure is realized by fixing a beryllium copper spring and a porcelain bead at the connecting part of the lowermost end of the inner side of the previous-stage sleeve; the auxiliary stretching structure is realized by fixing an auxiliary stretching spring in the sleeve; the auxiliary extension spring is used for playing an auxiliary role when the sleeve extends and retracts; the power failure protection structure comprises a motor, a coil spring and an auxiliary extension spring, through the above structure, the safety of the magnetic detection device is improved, the space is saved, the influence of airflow in the air is small, and the attitude of the unmanned aerial vehicle is not interfered.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) airborne magnetic anomaly detection technology, and in particular to a UAV retractable magnetic detection sleeve structure. Background Technology

[0002] Magnetic detection, as a key development direction in non-acoustic detection, is widely used in geological exploration, unexploded ordnance detection, underwater early warning, and mineral resource surveys due to its excellent cross-media propagation characteristics. Traditional manual magnetic detection methods are limited by complex terrain environments, resulting in high execution difficulty and low efficiency. Airborne magnetic detection, represented by airborne magnetic detection, has gradually become the main means of magnetic anomaly detection since the 21st century. Currently, there are three main types of UAV airborne magnetic detection systems on the market: cable-stayed, vertical pole, and horizontal pole. Cable-stayed systems connect the magnetometer and the UAV with a rope, maintaining a distance from the UAV fuselage. This makes the data less susceptible to UAV interference and unaffected by takeoff and landing. However, during operation in the air, airflow can cause the magnetometer to sway, easily leading to dead zones and severely impacting operational efficiency. Vertical pole magnetometers are positioned above the UAV, facilitating takeoff and landing, but the collected data is significantly affected by the UAV. Vertical pole magnetometers are inconvenient to takeoff and landing. Horizontal pole magnetometers are convenient to takeoff and landing, but their larger size extending beyond the UAV and the susceptibility of data to UAV fuselage interference, requiring magnetic data compensation, further complicates the process.

[0003] Therefore, improving the safety of magnetic detection devices while saving space has become one of the urgent existing technical problems to be solved. Summary of the Invention

[0004] This invention provides a retractable magnetic detection sleeve structure for unmanned aerial vehicles (UAVs) to improve the safety of magnetic detection devices and save space.

[0005] In a first aspect, a retractable magnetic detection sleeve structure for unmanned aerial vehicles (UAVs) is provided, comprising: a drive and recovery structure, a locking structure, an auxiliary extension structure, and a power-off protection structure; wherein...

[0006] The drive and recovery structure consists of a motor, motor shaft, coil spring, winch, and ultra-high molecular weight polyethylene rope (Dyneema) cable.

[0007] The locking structure is achieved by fixing the beryllium copper spring and ceramic ball to the lowest connection point inside the upper-level sleeve;

[0008] The auxiliary extension structure is achieved by fixing an auxiliary extension spring inside the sleeve; the auxiliary extension spring is used to assist in the extension and retraction of the sleeve.

[0009] The power failure protection structure includes a motor, a coil spring, and an auxiliary extension spring.

[0010] In one embodiment, the sleeve is a telescopic structure, and its main structure consists of a multi-section sleeve with a custom number of sections.

[0011] In one embodiment, the locking structure further includes a recess on the outer side of the next-level sleeve, the recess being respectively located at the top and bottom of the outer side of the next-level sleeve, with angles of 30° and 45° respectively.

[0012] In one embodiment, during the up-and-down movement of the sleeve, the outer wall of the inner sleeve compresses the spring, and when it encounters a recess, the beryllium copper spring extends and locks into the recess.

[0013] In one embodiment, the UAV retractable magnetic detection sleeve structure is mounted on the UAV landing gear via a snap-fit ​​on the retractable magnetic sleeve base.

[0014] In one embodiment, an onboard computer and a motor are mounted on the retractable magnetic sleeve base; the onboard computer is used to transmit data and send extension and retraction commands; a coil spring and a winch are connected to the shaft of the motor, and Dyneema cable is wound on the winch.

[0015] In one embodiment, a key is provided on the outer sleeve and a groove is provided on the inner sleeve wall. The keyway and groove prevent the sleeve from rotating and shifting.

[0016] In one embodiment, one end of the Dyneema cable is connected to the innermost section of the sleeve, and the other end is connected to the winch; the length of the Dyneema cable is the sum of the sleeve lengths when extended, and the cable is kept taut.

[0017] In one implementation, if the retractable magnetic detection sleeve structure of the UAV malfunctions and the retractable sleeve cannot be retrieved, when the UAV descends, the bottom section of the sleeve will touch the ground first, and the upward force after touching the ground will release the lock between the sleeve walls, allowing the sleeve to be retracted step by step.

[0018] In one embodiment, the sleeve is made of carbon fiber material.

[0019] This invention provides a retractable magnetic detection sleeve structure for unmanned aerial vehicles (UAVs), comprising: a drive and recovery structure, a locking structure, an auxiliary extension structure, and a power-off protection structure. The drive and recovery structure consists of a motor, a motor shaft, a coil spring, a winch, and a Dyneema ultra-high molecular weight polyethylene (UHMWPE) cable. The locking structure is achieved by fixing a beryllium copper spring and ceramic beads to the lowest connection point inside the upper-level sleeve. The auxiliary extension structure is achieved by fixing an auxiliary extension spring inside the sleeve; the auxiliary extension spring assists in the extension and retraction of the sleeve. The power-off protection structure includes a motor, a coil spring, and an auxiliary extension spring. This structure improves the safety of the magnetic detection device while saving space, minimizing its susceptibility to airflow in the air, and preventing interference with the UAV's attitude.

[0020] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of a retractable magnetic detection sleeve structure for an unmanned aerial vehicle according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a retractable magnetic detection sleeve for a drone according to an embodiment of the present invention. Detailed Implementation

[0024] To improve the safety of magnetic detection devices while saving space and not interfering with the attitude of UAVs, a retractable magnetic detection sleeve structure for UAVs is provided.

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Furthermore, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of the embodiments of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0027] like Figure 1-2 As shown, the embodiment provides a retractable magnetic detection sleeve structure for unmanned aerial vehicles (UAVs), which consists of a carbon fiber tube, a motor, an onboard computer, a coil spring, a motor shaft, a winch, Dyneema cable (ultra-high molecular weight polyethylene rope), an auxiliary extension spring, and a beryllium copper spring with ceramic beads, and has the following structure:

[0028] 1. Drive and Retrieval Structure. The device uses a motor, motor shaft, coil spring, and Dyneema cable as the drive and retrieval mechanism for the entire system.

[0029] During operation, the motor drives the shaft to rotate the winch to unload the line. After unloading, the sleeve unfolds gradually under its own weight and the action of the auxiliary spring. During retrieval, the motor rotates in the opposite direction to retract the line, gradually pulling the sleeve back in.

[0030] 2. Locking structure. A beryllium copper spring and ceramic beads are fixed at the lowest connection point on the inner side of the upper-level sleeve, and recesses with angles of 30° and 45° are set at the top and bottom of the outer side of the lower-level sleeve.

[0031] During contraction, the beryllium copper spring is compressed by the inner wall of the next stage sleeve. When it encounters a pit, the beryllium copper spring extends, and the ceramic bead gets stuck in the pit to form a lock.

[0032] 3. Auxiliary Extension Structure. An auxiliary extension spring is fixed inside the sleeve. After contraction and locking, the auxiliary extension spring generates a downward force to help the structure extend smoothly. After the structure is extended and locked, the auxiliary spring generates an upward force to assist in retraction upon receiving a command to retract the sleeve or upon power failure.

[0033] 4. Power-off protection structure. This structure mainly relies on coil springs and auxiliary extension springs. When the motor drives the winch to unload the line, the coil spring is compressed, generating a force that rotates in the opposite direction. When the motor is still powered, the force generated by the motor stalling can balance the force of the coil spring. After the system loses power, the coil spring drives the winch to wind up the line, retracting the sleeve step by step.

[0034] Furthermore, the sleeve is wider at the outside and narrower at the inside, with the diameter decreasing layer by layer. The length of the pull wire is the sum of the sleeve lengths when extended. This ensures sufficient space to accommodate the power supply and data transmission lines required by the magnetometer.

[0035] The retractable magnetic detection sleeve structure for the UAV is fixed to the UAV's landing gear with clips, located at the UAV's center of gravity, not extending beyond the UAV's footprint, and does not affect the UAV's takeoff and landing. Once the UAV is airborne, the onboard computer issues an extension command. At this time, the motor starts rotating, driving the coil spring and winch to rotate. The winch stores power to prepare for retraction in case of power failure. The winch rotates to release the cable, and the sleeve unfolds step by step from top to bottom. Each unfolded section is locked by a beryllium copper spring and ceramic beads inside the sleeve engaging with recesses on the sleeve wall. A keyway is provided inside the sleeve to prevent rotation or displacement during extension. When the onboard computer issues a retraction command, the motor rotates in the reverse direction, releasing the force stored in the coil spring. Simultaneously, it drives the winch to reel in the cable. The upward pulling force and the upward elastic force of the auxiliary spring overcome gravity and the locking mechanism, causing the sleeve to retract step by step. When the entire system loses power, the coil spring drives the motor shaft, and with the help of the auxiliary extension spring, the sleeve retracts step by step. Furthermore, if other unforeseen circumstances prevent the telescopic sleeve from retracting, it will not affect the drone's normal landing. When the drone descends, the bottom section of the telescopic sleeve touches the ground first. Upon contact with the ground, the upward force releases the locking mechanism between the sleeve walls, causing the sleeve to retract step by step without damaging the drone or the magnetometer inside the sleeve.

[0036] The embodiment provides a retractable magnetic detection sleeve structure for unmanned aerial vehicles (UAVs), which offers the following advantages: space advantage. Installed below the UAV and fixed to the landing gear, it does not occupy additional space; it features magnetic sensor retraction and power-off recovery functions, minimizing impact on magnetic data and ensuring good safety; its center of gravity coincides with the UAV's center of gravity, and its rigid structure minimizes the impact of airflow in the air, preventing interference with the UAV's attitude.

[0037] To make it easier to understand, a specific example is given below:

[0038] A retractable magnetic detection sleeve structure for unmanned aerial vehicles (UAVs) is designed to improve the accuracy and efficiency of airborne magnetic anomaly detection. The invention includes a main retractable sleeve structure, a locking structure, an auxiliary extension structure, a drive and retraction structure, and a power failure protection structure.

[0039] The telescopic sleeve structure consists of multiple sleeve sections with a customizable number of segments. These sleeves are made of carbon fiber, reducing weight and not affecting magnetic data. The sleeves are fixed to a non-magnetic base and secured to the UAV's landing gear with clips, facilitating installation without interfering with the aircraft's takeoff and landing.

[0040] The locking structure consists of a beryllium copper spring, a ceramic bead, and a recess on the outer side of the sleeve, with the recess being at 30° and 45°. During the up-and-down movement of the sleeve, the inner sleeve outer wall compresses the spring, and when it encounters the recess, the beryllium copper spring extends and engages with the recess to lock it in place.

[0041] The power failure protection structure consists of a coil spring and an auxiliary extension spring. When the system loses power, the motor stops working and cannot rewind the sleeve by electricity. At this time, the coil spring and auxiliary extension spring, which have been fully charged, start to work. The two forces overcome gravity and the locking of the pit, and retract the sleeve step by step.

[0042] To provide a clearer explanation of the invention, the overall structure and details will be described in detail below.

[0043] First, the clip connects to the sleeve base, which can be easily installed on the drone's landing gear. The onboard computer and drive motor are mounted on the sleeve base. The onboard computer is responsible for data transmission and sending extension and retraction commands. The motor shaft is connected to a coil spring and a winch, and a pull cable is wound on the winch.

[0044] Secondly, auxiliary extension springs are installed on the multi-section sleeves, which assist in the extension and retraction of the sleeves. Recesses are provided on the top and bottom outer walls of the sleeves to lock the beryllium copper springs and ceramic beads, thus locking the sleeve and preventing it from wobbling up and down. A key is provided on the outer sleeve, and a groove is provided on the inner sleeve wall; the keyway and groove are designed to prevent the sleeve from rotating off-center.

[0045] Finally, one end of the pull rope is connected to the innermost section of the sleeve, and the other end is connected to the winch. The length of the pull rope is determined by calculating the length of the sleeve, and the pull rope is kept taut for better force transmission.

[0046] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A retractable magnetic detection sleeve structure for unmanned aerial vehicles (UAVs), characterized in that, include: The system includes a drive and recovery structure, a locking structure, an auxiliary extension structure, and a power-off protection structure; among which, The drive and recovery structure consists of a motor, motor shaft, coil spring, winch, and ultra-high molecular weight polyethylene rope (Dyneema) cable. The locking structure is achieved by fixing the beryllium copper spring and ceramic ball to the lowest connection point inside the upper-level sleeve; The auxiliary extension structure is achieved by fixing an auxiliary extension spring inside the sleeve; the auxiliary extension spring is used to assist in the extension and retraction of the sleeve. The power failure protection structure includes a motor, a coil spring, and an auxiliary extension spring.

2. The UAV retractable magnetic detection sleeve structure according to claim 1, characterized in that, The sleeve is a telescopic structure, and its main structure consists of a multi-section sleeve with a custom number of sections.

3. The UAV retractable magnetic detection sleeve structure according to claim 2, characterized in that, The locking structure also includes recesses on the outer side of the next-level sleeve, the recesses being respectively located at the top and bottom of the outer side of the next-level sleeve, with angles of 30° and 45° respectively.

4. The UAV retractable magnetic detection sleeve structure according to claim 3, characterized in that, During the up-and-down movement of the sleeve, the inner sleeve outer wall compresses the spring. When it encounters a pit, the beryllium copper spring extends and locks into the pit.

5. The UAV retractable magnetic detection sleeve structure according to claim 4, characterized in that, The retractable magnetic detection sleeve structure of the UAV is installed on the landing gear of the UAV through the snap-fit ​​of the retractable magnetic sleeve base.

6. The UAV retractable magnetic detection sleeve structure according to claim 5, characterized in that, The retractable magnetic sleeve base is equipped with an onboard computer and a motor; the onboard computer is used to transmit data and send extension and retraction commands; a coil spring and a winch are connected to the shaft of the motor, and Dyneema cable is wound on the winch.

7. The UAV retractable magnetic detection sleeve structure according to claim 6, characterized in that, A key is provided on the outer sleeve, and a groove is provided on the inner sleeve wall. The keyway is provided to prevent the sleeve from rotating and shifting.

8. The UAV retractable magnetic detection sleeve structure according to claim 7, characterized in that, One end of the Dyneema cable is connected to the innermost section of the sleeve, and the other end is connected to the winch; the length of the Dyneema cable is the sum of the sleeve lengths when extended, and the cable is kept taut.

9. The UAV retractable magnetic detection sleeve structure according to claim 8, characterized in that, If the retractable magnetic detection sleeve structure of the UAV malfunctions and the retractable sleeve cannot be retrieved, when the UAV descends, the bottom section of the sleeve will touch the ground first, and the upward force after touching the ground will release the lock between the sleeve walls, allowing the sleeve to be retracted step by step.

10. The UAV retractable magnetic detection sleeve structure according to claim 9, characterized in that, The sleeve is made of carbon fiber.

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