Laser radar with magnetic isolation structure

Abstract

The utility model relates to a laser radar with a magnetic isolation structure, which comprises a shell with a mounting cavity, a bottom plate, a magnetic isolation structure, a magnetic isolation structure, a magnetic isolation structure and a magnetic isolation structure, wherein the bottom plate is arranged at the bottom of the mounting cavity; the core plate is arranged above the bottom plate; the rotating assembly comprises a main bearing arranged above the bottom plate and used for supporting a rotating bracket to rotate; one end of the rotating bracket is connected with the main bearing, and the other end is connected with the core plate to drive the core plate to rotate; the rotor is arranged on the periphery of the stator and is in telecommunication connection with the stator; the isolation structure comprises a magnetic isolation film which is arranged on the periphery of the rotor and is used for isolating mutual electromagnetic interference between the commutation current of the stator and the core board; the magnetic isolation diaphragm is arranged below the stator and the rotor and is used for isolating mutual electromagnetic interference between commutation current of the stator and the bottom plate; an optical component; a power supply assembly. According to the utility model, the interference of iron-containing parts in the laser radar on the operation stability of the brushless motor is improved, and the influence of continuously changing electromagnetic fields of the brushless stator on a mainboard in the radar is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lidar, and particularly relates to a lidar with a magnetic isolation structure. Background Art

[0002] Lidar is widely used in many fields such as robots, automated guided vehicles (AGVs), and automobiles. With the continuous improvement of requirements, the requirements for the quietness of lidar are getting higher and higher, and the volume is getting smaller and smaller, resulting in a more and more complex operating environment for brushless motors. Iron-containing parts in the environment (such as shielding covers, etc.) will change the rotor magnetic field, causing the brushless motor to still have unstable rotation speed when the current and voltage are stable. In addition, the electromagnetic field generated by the continuous change of the stator will also have a certain probability of affecting the stability of the main board devices. Content of the Utility Model

[0003] The purpose of the utility model is to provide a lidar with a magnetic isolation structure to overcome at least one of the defects existing in the above-mentioned prior art, so as to improve the smoothness of the operation of the brushless motor and the stability of the main board devices by isolating the mutual interference between the rotor and the stator and the internal main board of the radar.

[0004] The purpose of the utility model can be realized by the following technical solutions:

[0005] A lidar with a magnetic isolation structure includes a housing with an installation cavity inside, and the following components arranged in the installation cavity:

[0006] A bottom plate arranged at the bottom of the installation cavity;

[0007] A core board arranged above the bottom plate;

[0008] A rotating assembly, the rotating assembly includes: a main bearing arranged above the bottom plate to support the rotation of the rotating bracket; a rotating bracket, one end of the rotating bracket is connected to the main bearing, and the other end is connected to the core board to drive the core board to rotate; a stator and a rotor arranged inside the rotating bracket, the rotor is arranged outside the stator, and the two are electrically connected;

[0009] An isolation structure, the isolation structure includes: a magnetic isolation film arranged outside the rotor to cut off the mutual electromagnetic interference between the commutation current of the stator and the core board; a magnetic isolation film sheet arranged directly below the stator and the rotor to cut off the mutual electromagnetic interference between the commutation current of the stator and the bottom plate;

[0010] Optical component, the optical component includes an optical module connected to a rotating bracket and driven to rotate, the optical module is used to emit a projection beam to a target to be measured and receive a reflected beam reflected by the target to be measured, and then convert the reflected beam into an electrical signal; a secondary bearing having the same rotation axis as the optical component is provided between the upper end surface of the optical module and the housing;

[0011] Power supply component, the power supply component receives the electrical signal transmitted by the optical component, and is used to supply power to the rotating component to provide power for the rotation of the rotating bracket, and supply power to the optical component to provide power for the operation of the optical component.

[0012] Further, the magnetic isolation diaphragm is annular, the outer diameter is greater than or equal to the outer diameter of the rotor, and the inner diameter is less than or equal to the inner diameter of the stator.

[0013] Further, the magnetic isolation film is cylindrical, it is sleeved around the rotor, and a ring structure is provided on the side facing the core board, and the inner diameter of the ring structure is less than or equal to the inner diameter of the stator.

[0014] Further, the housing includes a bottom case, a bottom cover connected to the bottom surface of the bottom case, and an optical outer cover connected to the top surface of the bottom case, and the three enclose to form an installation cavity; the bottom plate is arranged above the bottom cover; the optical outer cover is connected to the secondary bearing to support the secondary bearing.

[0015] Further, the optical component further includes a photoelectric transmission member, the photoelectric transmission member includes an upper photoelectric tube and a lower photoelectric tube; the upper photoelectric tube is arranged on the bottom plate, and the lower photoelectric tube is arranged on the core board; the core board converts the reflected beam into an electrical signal and transmits it to the power supply component through the upper photoelectric tube and the lower photoelectric tube.

[0016] Further, the optical component further includes an encoder arranged on the core board and used to obtain the rotation speed of the optical component.

[0017] Further, the core board drives the encoder and the optical module to rotate together.

[0018] Further, the power supply component includes an external wire and a power supply part; one end of the external wire extends into the installation cavity and is connected to the bottom plate, and the other end is connected to an external power supply device for supplying power to the rotating component; the power supply part is arranged on the bottom plate and is used to supply power to the optical component.

[0019] Further, the external wire and the power supply part are respectively welded to the bottom plate.

[0020] Further, the power supply component includes a power supply coil and a power receiving coil. The power supply coil is connected to the bottom plate and is used to obtain alternating current. The power receiving coil is arranged inside the rotating bracket and is connected to the power supply coil. The power receiving coil generates an induced electromotive force based on the induced electromagnetic field generated by the power supply coil and supplies power to the core board.

[0021] Further, the main bearing and the auxiliary bearing are on the same axis, and the auxiliary bearing is used to control the rotation of the optical module and the core board on the same axis.

[0022] Compared with the prior art, the present utility model has the following advantages:

[0023] (1) The present utility model provides a lidar with a magnetic isolation structure, which can improve the interference of iron-containing parts inside the lidar on the stability of the operation of the brushless motor.

[0024] (2) The present utility model provides a lidar with a magnetic isolation structure, which can improve the influence of the continuously changing electromagnetic field of the brushless stator on the main board inside the radar.

[0025] (3) The present utility model provides a lidar with a magnetic isolation structure, which can improve the service life of the rotary lidar.

[0026] (4) The present utility model provides a lidar with a magnetic isolation structure, which can reduce the software calculation load caused by unstable rotation speed of the lidar.

[0027] (5) The present utility model provides a lidar with a magnetic isolation structure, which can reduce the problems of abnormal noise and uneven sound caused by unstable rotation inside the lidar. Description of the Drawings

[0028] Figure 1 It is a cross-sectional view of the lidar with a magnetic isolation structure in the embodiment.

[0029] The labels in the figure are shown as follows: 1 - bottom case; 2 - stator; 3 - rotor; 4 - magnetic isolation film; 5 - rotating bracket;; 6 - optical cover; 7 - optical module; 8 - auxiliary bearing; 9 - encoder; 10 - core board; 11 - main bearing; 12 - external wiring; 13 - bottom plate; 14 - power supply coil; 15 - power receiving coil; 16 - bottom cover; 17 - upper photoelectric tube; 18 - lower photoelectric tube; 19 - lower magnetic isolation film piece. Detailed Embodiment

[0030] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present utility model, and detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0031] In the technical solution, components such as component models, material names, connection structures, control methods, etc. that are not clearly described are regarded as common technical features disclosed in the prior art.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0033] In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" 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 bolt connection or a welding connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] Iron-containing parts in the existing environment, such as shielding covers, etc., will change the rotor magnetic field, resulting in the situation that the rotational speed of the brushless motor is still unstable when the current and voltage are stable. In addition, the electromagnetic field generated by the continuous change of the stator will also affect the stability performance of the main board devices with a certain probability.

[0035] Embodiment

[0036] In order to improve the running stability of the brushless motor and the stability performance of the main board devices, this embodiment proposes a lidar with a magnetic isolation structure. The specific structure is shown in Figure 1 , including a housing with an installation cavity inside, and the following arranged in the installation cavity:

[0037] A bottom plate 13 arranged at the bottom of the installation cavity;

[0038] A core board 10 arranged above the bottom plate 13;

[0039] Rotating assembly, the rotating assembly includes: a main bearing 11 disposed above the bottom plate 13 to support the rotation of the rotating bracket 5; a rotating bracket 5, one end of the rotating bracket 5 is connected to the main bearing 11, and the other end is connected to the core board 10 to drive the core board 10 to rotate; a stator 2 and a rotor 3 disposed within the rotating bracket 5, the rotor 3 is disposed on the periphery of the stator 2, and the two are electrically connected;

[0040] Isolation structure, the isolation structure includes: a magnetic isolation film 4 disposed on the periphery of the rotor 3 to block the mutual electromagnetic interference between the commutation current of the stator 2 and the core board 10; a magnetic isolation film 19 disposed directly below the stator 2 and the rotor 3 to block the mutual electromagnetic interference between the commutation current of the stator 2 and the bottom plate 13;

[0041] Optical assembly, the optical assembly includes an optical module 7 connected to and driving the rotation of the rotating bracket 5, the optical module 7 is configured to emit a projection beam to a target to be measured and receive a reflected beam reflected by the target to be measured, and then convert the reflected beam into an electrical signal; a secondary bearing 8 having the same rotation axis as the optical assembly is disposed between the upper end surface of the optical module 7 and the housing;

[0042] Power supply assembly, the power supply assembly receives the electrical signal transmitted by the optical assembly, and is configured to supply power to the rotating assembly to provide power for the rotation of the rotating bracket 5, and supply power to the optical assembly to provide power for the operation of the optical assembly.

[0043] Wherein, the core board 10 and the bottom plate 13 are the main boards of the lidar.

[0044] Please refer to Figure 1 again. In this embodiment, the magnetic isolation film 19 is annular, the outer diameter is greater than or equal to the outer diameter of the rotor 3, and the inner diameter is less than or equal to the inner diameter of the stator 2.

[0045] Please refer to Figure 1 again. In this embodiment, the magnetic isolation film 4 is cylindrical, it is sleeved on the periphery of the rotor 3, and a ring structure is provided on the side facing the core board 10, and the inner diameter of the ring structure is less than or equal to the inner diameter of the stator 2.

[0046] Please refer to Figure 1 again. In this embodiment, the main bearing 11 and the secondary bearing 8 are on the same axis, and the optical module 7 and the core board 10 are controlled to rotate on the same axis through the secondary bearing 8.

[0047] Please refer to Figure 1, in this embodiment, the housing includes a bottom case 1, a bottom cover 16 connected to the bottom surface of the bottom case 1, and an optical outer cover 6 connected to the top surface of the bottom case 1. The three enclose to form an installation cavity; the bottom plate 13 is arranged above the bottom cover 16; the optical outer cover 6 is connected to the auxiliary bearing 8 to support the auxiliary bearing 8.

[0048] Please refer to Figure 1 , in this embodiment, the optical component further includes a photoelectric transmission component, and the photoelectric transmission component includes an upper phototube 17 and a lower phototube 18;

[0049] The upper phototube 17 is arranged on the bottom plate 13, and the lower phototube 18 is arranged on the core board 10;

[0050] The core board 10 converts the reflected light beam into an electrical signal and transmits it to the power supply component through the upper phototube 17 and the lower phototube 18.

[0051] Please refer to Figure 1 , in this embodiment, the optical component further includes an encoder 9 arranged on the core board 10 and used to obtain the rotation speed of the optical component.

[0052] In this embodiment, the core board 10 drives the encoder 9 and the optical module 7 to rotate together.

[0053] Please refer to Figure 1 , in this embodiment, the power supply component includes an external wire 12 and a power supply part; one end of the external wire 12 extends into the installation cavity and is connected to the bottom plate 13, and the other end is connected to an external power supply device for supplying power to the rotating component; the power supply part is arranged on the bottom plate 13 and is used to supply power to the optical component. The power supply part includes a power supply coil 14 and a power receiving coil 15. The power supply coil 14 is connected to the bottom plate 13 and is used to obtain alternating current. The power receiving coil 15 is arranged inside the rotating bracket 5 and is connected to the power supply coil 14. The power receiving coil 15 generates an induced electromotive force based on the induced electromagnetic field generated by the power supply coil 14 and supplies power to the core board 10.

[0054] Working principle:

[0055] The lidar of this embodiment is powered by an external wire 12 to the bottom plate 13. The bottom plate 12 controls the stator 2 to drive the rotor 3 to rotate, driving the rotating bracket 5 to rotate synchronously. The main bearing 11 supports the rotation of the rotating bracket 5. The rotating bracket 5 drives the core board 10 to rotate. The core board 10 drives the encoder 9 and the optical module 7 to rotate together. The optical module 7 is controlled by the auxiliary bearing 8 to rotate coaxially. The optical housing 6 supports the inner wall of the auxiliary bearing 8 to rotate. At the same time, the bottom plate 13 controls the power supply coil 14 to supply power to the power receiving coil 15. The power receiving coil 15 supplies power to the core board 10. The core board 10 emits and receives optical signals through the optical component 7, converts them into optoelectronic signals, sends them to the lower phototube 18 through the upper phototube 17, and converts them into electrical signals through the bottom plate 13 and transmits them out through the external wire 12.

[0056] The magnetic isolation film 4 and the magnetic isolation film piece 19 wrap the rotor 3 and the stator 2 therein, isolating the commutation current of the brushless stator 2 and the mutual electromagnetic interference between the core board 10 and the bottom plate 13 inside the radar, avoiding the magnetic field caused by the components or circuits of the core board 10 and the bottom plate 13 from affecting the operation of the rotor 3, and also avoiding the changing magnetic field generated by the continuously changing current of the stator 2 from affecting the normal operation of the components or circuits on the core board 10 and the bottom plate 13.

[0057] Compared with the prior art where there are problems of mutual interference when brushless motors are installed in electronic devices, through multiple demonstrations and experimental verifications in this embodiment, the effective wrapping of the rotor 3 and the stator 2 by the magnetic isolation film 4 and the magnetic isolation film piece 19 has successfully avoided the mutual interference between the motor rotor and stator and the main board inside the radar.

[0058] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A lidar with a magnetic isolation structure, characterized in that It includes a housing with an installation cavity inside, and the following components arranged in the installation cavity: A bottom plate (13) arranged at the bottom of the installation cavity; A core board (10) arranged above the bottom plate (13); A rotating assembly, the rotating assembly includes: A main bearing (11) arranged above the bottom plate (13) to support the rotation of the rotating bracket (5); A rotating bracket (5), one end of the rotating bracket (5) is connected to the main bearing (11), and the other end is connected to the core board (10) to drive the core board (10) to rotate; A stator (2) and a rotor (3) arranged inside the rotating bracket (5), the rotor (3) is arranged on the periphery of the stator (2), and the two are electrically connected; An isolation structure, the isolation structure includes: A magnetic isolation film (4) arranged on the periphery of the rotor (3) to block the mutual electromagnetic interference between the commutation current of the stator (2) and the core board (10); A magnetic isolation film piece (19) arranged directly below the stator (2) and the rotor (3) to block the mutual electromagnetic interference between the commutation current of the stator (2) and the bottom plate (13); An optical component, the optical component includes an optical module (7) connected to the rotating bracket (5) and driven to rotate, the optical module (7) is used to emit a projection beam to a target to be measured and receive the reflected beam reflected by the target to be measured, and then convert the reflected beam into an electrical signal; a secondary bearing (8) with the same rotation axis as the optical component is arranged between the upper end face of the optical module (7) and the housing; A power supply component, the power supply component receives the electrical signal transmitted by the optical component, and is used to supply power to the rotating component to provide the power for the rotation of the rotating bracket (5), and supply power to the optical component to provide the power for the operation of the optical component.

2. The lidar with a magnetic isolation structure according to claim 1, wherein The magnetic isolation film piece (19) is annular, the outer diameter is greater than or equal to the outer diameter of the rotor (3), and the inner diameter is less than or equal to the inner diameter of the stator (2).

3. A lidar with a magnetic isolation structure according to claim 1, characterized in that, The magnetic isolation film (4) is cylindrical, it is sleeved on the periphery of the rotor (3), and a ring structure is arranged on the side facing the core board (10), and the inner diameter of the ring structure is less than or equal to the inner diameter of the stator (2).

4. A lidar with a magnetic isolation structure according to claim 1, characterized in that, The housing includes a bottom shell (1), a bottom cover (16) connected to the bottom surface of the bottom shell (1), and an optical outer cover (6) connected to the top surface of the bottom shell (1), and the three enclose to form an installation cavity; The bottom plate (13) is arranged above the bottom cover (16); the optical outer cover (6) is connected to the secondary bearing (8) to support the secondary bearing (8).

5. The lidar with a magnetic isolation structure according to claim 1, wherein, The optical component further includes a photoelectric transmission part, and the photoelectric transmission part includes an upper photoelectric tube (17) and a lower photoelectric tube (18); The upper photoelectric tube (17) is arranged on the bottom plate (13), and the lower photoelectric tube (18) is arranged on the core board (10); The core board (10) converts the reflected beam into an electrical signal and transmits it to the power supply component through the upper photoelectric tube (17) and the lower photoelectric tube (18).

6. The lidar with a magnetic isolation structure according to claim 1, characterized in that, The optical component further includes an encoder (9) arranged on the core board (10) and used to obtain the rotation speed of the optical component.

7. The lidar with a magnetic isolation structure according to claim 6, wherein, The core board (10) drives the encoder (9) and the optical module (7) to rotate together.

8. A lidar with a magnetic isolation structure according to claim 1, characterized in that, The power supply assembly includes an external wire (12) and a power supply component; One end of the external wire (12) extends into the installation cavity and is connected to the bottom plate (13), and the other end is connected to an external power supply device for supplying power to the rotating assembly; The power supply component is arranged on the bottom plate (13) and is used to supply power to the optical component.

9. The lidar with a magnetic isolation structure according to claim 8, characterized in that, The power supply component includes a power supply coil (14) and a power receiving coil (15). The power supply coil (14) is connected to the bottom plate (13) and is used to obtain alternating current. The power receiving coil (15) is arranged inside the rotating bracket (5) and is connected to the power supply coil (14). The power receiving coil (15) generates an induced electromotive force based on the induced electromagnetic field generated by the power supply coil (14) and supplies power to the core board (10).

10. A lidar with a magnetic isolation structure according to claim 1, characterized in that, The main bearing (11) and the auxiliary bearing (8) are on the same axis, and the auxiliary bearing (8) is used to control the optical module (7) and the core board (10) to rotate on the same axis.

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