Magnetic suspension laser radar

Abstract

The invention belongs to the technical field of distance detection, and discloses a magnetic suspension laser radar, which comprises a base, a bottom plate, a main circuit board, a magnetic suspension assembly, a driving motor and a radar assembly, and is characterized in that the base comprises a first accommodating groove and a second accommodating groove, the second accommodating groove is provided with a first space and a second space, and the main circuit board comprises a mainboard arranged in the first accommodating groove; the magnetic suspension assembly comprises two opposite annular magnets with the same magnetism and a power supply coil located in center holes of the annular magnets, the power supply coil and the annular magnet are arranged in the first space, the power supply coil and the driving motor are both electrically connected with the main board, the driving motor comprises a stator and a rotor, the stator is arranged in the second space, and the rotor is arranged in the second space. The radar assembly comprises a mounting base, a receiving coil and a radar unit, the other annular magnet, the rotor and the radar unit are all connected with the mounting base, the receiving coil is electrically connected with the radar unit, and the bottom plate blocks the first containing groove. The magnetic suspension laser radar is free of noise in the working process, stable in rotation and long in service life.

Description

Technical Field

[0001] The present invention relates to the field of distance detection technology, and in particular to a magnetic levitation laser radar. Background Art

[0002] Laser radar is a component that emits and receives laser beams, analyzes the return time of the laser beam after encountering the detection target, and calculates the relative distance between the detection target and the location of the laser radar. It is mostly used in vehicles, low-altitude flying helicopters, and fixed detection equipment.

[0003] In order to expand the detection range of laser radar and more accurately determine the location of the detection target, the laser light source in the existing laser radar is mostly able to rotate. Conventional laser radars are mostly supported by bearings and use gears and belts to realize the rotation of the laser light source. However, the bearings, gears and belts will generate noise during operation and the bearings will rotate smoothly. That is, the existing laser radar will generate noise during operation and the rotation stability is poor. At the same time, bearings, gears and belts will cause friction damage after long-term operation, which will affect the service life of the laser radar.

[0004] Therefore, there is an urgent need for a magnetic levitation laser radar to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a magnetic levitation laser radar that can solve the technical problems of existing laser radars generating noise during operation, having poor rotation stability and a relatively short service life.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A magnetic levitation laser radar, comprising:

[0008] The base and the bottom plate include a first receiving groove and a second receiving groove, wherein an annular baffle is provided in the second receiving groove, and the annular baffle is used to separate the second receiving groove into a first space and a second space, and the first space is connected to the first receiving groove; the bottom plate is used to block the first receiving groove;

[0009] A main circuit board, including a main board and a flat cable, wherein the main board is placed in the first receiving groove, and a portion of the flat cable is exposed from the base;

[0010] A magnetic suspension assembly, comprising two opposite annular magnets with the same magnetic properties and a power supply coil, wherein the power supply coil is located in the center holes of the two annular magnets, the power supply coil and one of the annular magnets are placed in the first space, and the mainboard is electrically connected to the power supply coil;

[0011] A driving motor, the mainboard is electrically connected to the driving motor, the driving motor comprises a stator and a rotor, and the stator is placed in the second space;

[0012] The radar assembly comprises a mounting seat, a receiving coil and a radar unit, wherein the mounting seat is connected to another annular magnet, the rotor is connected to the mounting seat, the receiving coil is electrically connected to the radar unit, and the radar unit is connected to the mounting seat.

[0013] As an optimal technical solution for the magnetic levitation laser radar, a center column is provided at the center of the first space, the center column is provided with a through hole, the mounting seat is provided with a positioning column opposite to the through hole, the positioning column is provided with a protrusion, and when the positioning column passes through the through hole, the protrusion is clamped with the bottom surface of the center column.

[0014] As a preferred technical solution for the magnetic levitation laser radar, the radar component also includes a retaining spring, which is sleeved on the outer periphery of the positioning column and is located between the protrusion and the bottom surface of the center column.

[0015] As a preferred technical solution for the magnetic levitation laser radar, a first annular groove is provided on the outer periphery of the central column, and the power supply coil is placed in the first annular groove.

[0016] As a preferred technical solution for the magnetic levitation laser radar, a mounting column is provided on the side of the mounting seat facing the base, the mounting column is placed in the center holes of the two annular magnets, an avoidance groove is provided at the center of the mounting column, the avoidance groove cover is provided on the center column, a second annular groove is provided on the outer periphery of the avoidance groove, and the receiving coil is placed in the second annular groove.

[0017] As a preferred technical solution for the magnetic levitation laser radar, a receiving module is provided on the main circuit board, and the radar unit includes a transmitting module, and the transmitting module is communicatively connected with the receiving module.

[0018] As a preferred technical solution of the magnetic levitation laser radar, the magnetic levitation laser radar also includes an optical cover, and the optical cover is arranged on the base.

[0019] As a preferred technical solution for the magnetic levitation laser radar, a protrusion is provided on one end of the base facing the optical cover, and a groove is provided on the corresponding end of the optical cover.

[0020] As an optimal technical solution for the magnetic levitation laser radar, a stud is provided in the second accommodating groove, the optical outer cover is provided with an assembly hole corresponding to the stud, and the magnetic levitation laser radar also includes a locking piece, which is threadedly connected to the stud.

[0021] As a preferred technical solution for the magnetic levitation laser radar, the side wall of the first accommodating groove is provided with a wire hole, and the wiring is exposed to the base through the wire hole.

[0022] The beneficial effects of the present invention are:

[0023] The magnetic levitation laser radar provided by the present invention is powered by an external power supply to the mainboard, and the mainboard supplies power to the power supply coil, so that the force on the upper annular magnet of the two annular magnets is zero, forming a suspended state, and the mounting seat is connected to the annular magnet in the suspended state, so that the radar unit is suspended, that is, the mounting seat is separated from the base in the height direction, and the mainboard supplies power to the drive motor, and the rotor of the drive motor is connected to the mounting seat. After the drive motor is powered on, it can drive the radar unit to rotate. By setting the magnetic levitation component and the drive motor, the radar component will not produce friction contact with the base when rotating, and effectively solve the problem of noise generated by the existing rotating laser radar during operation. Moreover, compared with the existing technology that drives the radar component to rotate by means of bearings, gears and belts, the magnetic levitation laser radar will not produce friction damage during operation, so that the service life of the magnetic levitation laser radar is guaranteed. At the same time, after the power supply coil is energized, it can ensure that the suspended annular magnet is always in a stable state, and after the drive motor is running, the stability of the rotation process of the radar unit can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional schematic diagram of the magnetic levitation laser radar provided by the present invention;

[0025] Figure 2 It is a structural schematic diagram of a base of a magnetic levitation laser radar provided by the present invention;

[0026] Figure 3 It is a structural schematic diagram of the mounting base of the magnetic levitation laser radar provided by the present invention.

[0027] In the figure:

[0028] 1. Base; 11. First receiving groove; 12. Second receiving groove; 120. Annular baffle; 121. First space; 1211. Center column; 122. Second space; 13. Protrusion;

[0029] 2. Main circuit board; 21. Main board; 22. Flex cable;

[0030] 3. Magnetic suspension assembly; 31. Ring magnet; 32. Power supply coil;

[0031] 4. Drive motor;

[0032] 5. Radar assembly; 51. Mounting seat; 511. Positioning column; 5111. convex head; 512. Mounting column; 52. Receiving coil; 53. Radar unit; 54. Circlip;

[0033] 6. Base plate; 7. Optical cover; 71. Groove. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] like Figures 1 to 3As shown, this embodiment provides a magnetic levitation laser radar, including a base 1, a main circuit board 2, a magnetic levitation component 3, a drive motor 4, a radar component 5 and a bottom plate 6. The base 1 includes a first receiving groove 11 and a second receiving groove 12. An annular baffle 120 is provided in the second receiving groove 12 to separate the second receiving groove 12 into a first space 121 and a second space 122. The main circuit board 2 includes a main board 21 and a cable 22. The main board 21 is placed in the first receiving groove 11, and part of the cable 22 is exposed to the base 1, so that the main board 21 can be powered by an external power supply. Specifically, a wire hole is provided on the side wall of the first receiving groove 11, and the cable 22 is exposed to the base 1 through the wire hole. The bottom plate 6 is used to block the first receiving groove 11 to prevent the main board 21 from leaking electricity. The magnetic suspension assembly 3 includes two ring magnets 31 that are opposite and have the same magnetic properties and a power supply coil 32. The power supply coil 32 is located in the center holes of the two ring magnets 31, and the power supply coil 32 and one of the ring magnets 31 are placed in the first space 121, that is, located in the inner circle of the annular baffle 120, wherein the first space 121 is connected to the first receiving groove 11, the main board 21 is electrically connected to the power supply coil 32, and the main board 21 is provided with a lead wire, which is electrically connected to the power supply coil 32 after passing through the place where the first space 121 is connected to the first receiving groove 11. Since the two ring magnets 31 are opposite and have the same magnetic properties, the two ring magnets 31 will repel each other when they are opposite, and at the same time, the main board 21 supplies power to the power supply coil 32, and the main board 21 provides the power supply coil 32 with alternating positive and negative voltages, so that the resultant force on the upper ring magnet 31 of the two ring magnets 31 can be zero, and the ring magnet 31 is suspended above the other ring magnet 31. The main board 21 is also electrically connected to the drive motor 4 to make the drive motor 4 run. The drive motor 4 includes a stator and a rotor, and the stator is placed in the second space 122, specifically sleeved on the outer periphery of the annular baffle 120, to improve the rationality of the layout of the drive motor 4 on the base 1. In this embodiment, the annular magnet 31 located in the first space 121 is fixedly connected to the base 1. The drive motor 4 can be an asynchronous motor.

[0039] The radar assembly 5 includes a mounting seat 51, a receiving coil 52 and a radar unit 53. The mounting seat 51 is connected to another annular magnet 31, that is, the mounting seat 51 is connected to the suspended annular magnet 31, and the two are fixedly connected, so that the mounting seat 51 is suspended, that is, the mounting seat 51 and the base 1 are separated in the height direction, and the rotor is connected to the mounting seat 51. In this way, when the mainboard 21 supplies power to the drive motor 4, the rotor will drive the mounting seat 51 to rotate, and the radar unit 53 is connected to the mounting seat 51. Then, when the rotor rotates, the radar unit 53 will rotate 360 ​​degrees. The receiving coil 52 is electrically connected to the radar unit 53. When the mainboard 21 supplies power to the power supply coil 32, the power supply coil 32 will generate a changing magnetic field, and the changing magnetic field will cause the receiving coil 52 to generate current, thereby realizing power supply to the radar unit 53. The generation of a changing magnetic field when the power supply coil 32 supplies power to cause the receiving coil 52 to generate current is a conventional technical means in the field of wireless charging and does not belong to the key protection content of this embodiment.

[0040] The magnetic levitation laser radar provided in this embodiment is powered by an external power supply to the mainboard 21, and the mainboard 21 supplies power to the power supply coil 32, so that the force on the upper annular magnet 31 of the two annular magnets 31 is zero, forming a suspended state, and the mounting seat 51 is connected to the annular magnet 31 in the suspended state, so that the radar unit 53 is suspended, that is, the mounting seat 51 is separated from the base 1 in the height direction, and the mainboard 21 supplies power to the drive motor 4, and at the same time, the rotor of the drive motor 4 is connected to the mounting seat 51. After the drive motor 4 is powered on, it can drive the radar component 5 to rotate. By setting the magnetic levitation component 3 and the drive motor 4, the radar component 5 will not have friction contact with the base 1 when rotating, which effectively solves the problem of noise generated by the existing rotating laser radar during operation. In addition, compared with the existing technology that drives the radar component 5 to rotate by means of bearings, gears and belts, the magnetic levitation laser radar will not cause friction damage during operation, so that the service life of the magnetic levitation laser radar is guaranteed. At the same time, after the power supply coil 32 is energized, it can ensure that the suspended annular magnet 31 is always in a stable state. After the driving motor 4 is running, the stability of the rotation process of the radar unit 53 can be improved.

[0041] In this embodiment, a central column 1211 is provided at the center of the first space 121, and the central column 1211 is provided with a through hole. A positioning column 511 opposite to the through hole is provided on the mounting seat 51, and the positioning column 511 is provided with a convex head 5111. When the positioning column 511 passes through the through hole, the convex head 5111 is engaged with the bottom surface of the central column 1211. In this way, when the driving motor 4 drives the radar assembly 5 to rotate, the annular magnet 31 and the mounting seat 51 in the suspended state are prevented from swinging, thereby further improving the stability of the radar unit 53 during the rotation process. Furthermore, the radar assembly 5 also includes a retaining spring 54, which is mounted on the outer periphery of the positioning column 511 and is located between the convex head 5111 and the bottom surface of the central column 1211. The provision of the retaining spring 54 can prevent the mounting seat 51 from being separated from the base 1 when the magnetic levitation laser radar is taken, thereby further improving the rationality of the design of the magnetic levitation laser radar. Furthermore, a first annular groove is provided on the outer periphery of the central column 1211, wherein the power supply coil 32 is placed in the first annular groove. This can make the layout of the power supply coil 32 and the base 1 more compact, occupying less space, thereby improving the miniaturization of the magnetic levitation laser radar.

[0042] Furthermore, a mounting column 512 is provided on the side of the mounting seat 51 facing the base 1, and the mounting column 512 is placed in the center holes of the two annular magnets 31. An avoidance groove is provided in the center of the mounting column 512, and the avoidance groove cover is provided on the center column 1211, so as to further improve the compactness of the layout of the mounting seat 51 and the base 1. Specifically, the positioning column 511 is located at the center of the avoidance groove. Among them, a second annular groove is provided on the outer periphery of the avoidance groove, and the receiving coil 52 is placed in the second annular groove, so that the layout between the receiving coil 52 and the mounting seat 51 and the base 1 is more compact, further improving the miniaturization of the magnetic levitation laser radar, and making the magnetic levitation laser radar suitable for more assembly scenarios.

[0043] In this embodiment, a receiving module is provided on the main circuit board 2, and the radar unit 53 includes a transmitting module, which is communicatively connected with the receiving module. The radar unit 53 will communicate the distance data of the detected target to the receiving module, and the receiving module is connected to one of the transmission lines in the flat cable 22, so that the distance data of the target can be transmitted to the external display device through the transmission line. Specifically, the radar unit 53 also includes an integrated circuit board and a laser emitting component, an optical receiving component and a chip placed on the integrated circuit board. The laser emitting component is used to emit multiple laser beams outward. When the laser encounters the target, part of the light will be reflected back. The optical receiving component is used to capture the reflected light. A timer is provided in the chip to record the interval between the laser emission time and the receiving time. A calculation module is also provided in the chip to calculate the distance of the target according to the time interval and the speed of light. At the same time, one of the pins of the chip is connected to the transmitting module, and the calculated distance value of the target is transmitted to the transmitting module, and then the transmitting module communicates the distance value of the target to the receiving module on the main board 21. The structure and principle of the radar unit 53 can refer to the prior art, and will not be described in detail here. In this embodiment, the transmitting module and the receiving module realize communication connection through Bluetooth. Bluetooth communication is a conventional technical means in the communication field and is not the key protection content of this embodiment.

[0044] In this embodiment, the magnetic levitation laser radar also includes an optical cover 7, wherein the optical cover 7 is covered on the base 1. The optical cover 7 can protect the magnetic levitation component 3, the drive motor 4 and the radar component 5, and improve the service life of the magnetic levitation laser radar. Among them, the optical cover 7 has high transmittance and radiation protection, ensuring that the emission and reception of laser light are not affected, and preventing external radiation from interfering with the laser emitting component and the optical receiving component. Further, a protrusion 13 is provided at one end of the base 1 facing the optical cover 7, and a groove 71 is provided corresponding to the optical cover 7. When the optical cover 7 is covered on the base 1, the protrusion 13 is placed in the groove 71, and the setting of the protrusion 13 and the groove 71 can position the assembly of the optical cover 7 and the base 1, so that the two can be quickly assembled. At the same time, it can also prevent external impurities and water vapor from entering the interior of the magnetic levitation laser radar, thereby improving the service life of the magnetic levitation laser radar.

[0045] Furthermore, a stud is provided in the second receiving groove 12, and an assembly hole corresponding to the stud is provided on the optical cover 7, and the magnetic levitation laser radar further comprises a locking member, and the locking member is threadedly connected to the stud. Specifically, the stud comprises a thread groove, and the locking member is a bolt, and the bolt has an external thread, and the thread groove is provided with an internal thread, so as to realize the threaded connection between the locking member and the stud.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. 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 claims of the present invention.

Claims

1. A magnetic levitation laser radar, characterized in that: include: A base (1) and a bottom plate (6), wherein the base (1) comprises a first receiving groove (11) and a second receiving groove (12), wherein an annular baffle (120) is arranged in the second receiving groove (12), and the annular baffle (120) is used to separate the second receiving groove (12) into a first space (121) and a second space (122), wherein the first space (121) is communicated with the first receiving groove (11); and the bottom plate (6) is used to block the first receiving groove (11); A main circuit board (2), comprising a main board (21) and a flat cable (22), wherein the main board (21) is placed in the first receiving groove (11), and a portion of the flat cable (22) is exposed outside the base (1); A magnetic suspension assembly (3), comprising two annular magnets (31) facing each other and having the same magnetic properties and a power supply coil (32), wherein the power supply coil (32) is located in the center holes of the two annular magnets (31), the power supply coil (32) and one of the annular magnets (31) are placed in the first space (121), and the main board (21) is electrically connected to the power supply coil (32); A drive motor (4), the main board (21) being electrically connected to the drive motor (4), the drive motor (4) comprising a stator and a rotor, the stator being disposed in the second space (122); A radar assembly (5) comprises a mounting seat (51), a receiving coil (52) and a radar unit (53), wherein the mounting seat (51) is connected to another annular magnet (31), the rotor is connected to the mounting seat (51), the receiving coil (52) is electrically connected to the radar unit (53), and the radar unit (53) is connected to the mounting seat (51).

2. The magnetic levitation laser radar according to claim 1, characterized in that: A center column (1211) is provided at the center of the first space (121), and the center column (1211) is provided with a through hole. The mounting seat (51) is provided with a positioning column (511) opposite to the through hole, and the positioning column (511) is provided with a convex head (5111). When the positioning column (511) passes through the through hole, the convex head (5111) is snap-fitted with the bottom surface of the center column (1211).

3. The magnetic levitation laser radar according to claim 2, characterized in that: The radar assembly (5) further comprises a retaining spring (54), wherein the retaining spring (54) is sleeved on the outer periphery of the positioning column (511) and is located between the protruding head (5111) and the bottom surface of the central column (1211).

4. The magnetic levitation laser radar according to claim 2, characterized in that: A first annular groove is provided on the outer periphery of the central column (1211), and the power supply coil (32) is placed in the first annular groove.

5. The magnetic levitation laser radar according to claim 4, characterized in that: A mounting column (512) is provided on one side of the mounting seat (51) facing the base (1), the mounting column (512) is placed in the center holes of the two annular magnets (31), a avoidance groove is provided in the center of the mounting column (512), the avoidance groove cover is arranged on the center column (1211), a second annular groove is provided on the outer periphery of the avoidance groove, and the receiving coil (52) is placed in the second annular groove.

6. The magnetic levitation laser radar according to claim 1, characterized in that: The main circuit board (2) is provided with a receiving module, and the radar unit (53) includes a transmitting module, and the transmitting module is communicatively connected with the receiving module.

7. The magnetic levitation laser radar according to claim 1, characterized in that: The magnetic levitation laser radar further comprises an optical cover (7), wherein the optical cover (7) is disposed on the base (1).

8. The magnetic levitation laser radar according to claim 7, characterized in that: A protrusion (13) is provided around one end of the base (1) facing the optical cover (7), and a groove (71) is provided around the optical cover (7) correspondingly.

9. The magnetic levitation laser radar according to claim 8, characterized in that: A stud is provided in the second receiving groove (12), and the optical cover (7) is provided with an assembly hole corresponding to the stud. The magnetic levitation laser radar also includes a locking piece, and the locking piece is threadedly connected to the stud.

10. The magnetic levitation laser radar according to claim 1, characterized in that: The side wall of the first accommodating groove (11) is provided with a wire-passing hole, and the cable (22) is exposed to the base (1) through the wire-passing hole.

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