Ranging System and Mobile Platform

Patent metadata

Field	Value
Publication number	US-2022334263-A1
Application number	US-202217848832-A
Country	US
Kind code	A1
Filing date	Jun 24, 2022
Priority date	Dec 27, 2019
Publication date	Oct 20, 2022
Grant date	—

Abstract

A ranging system and a mobile platform are provided. The ranging system includes a laser, a coaxial optical lens group, a mirror group, a moving component, and a processing circuit. When the laser emits laser light to the mirror group by using the coaxial optical lens group, the moving component drives the mirror group to rotate, so that the laser light is irradiated to a measured object at different angles, to implement ranging of the measured object. The moving component bears a light object, so that the moving component rotates quickly. Therefore, if the ranging system is installed on a vehicle, the ranging system can implement fast ranging of incoming and outgoing vehicles and meet a ranging requirement of an autonomous driving technology.

First claim

In the claims:

1 . A ranging system, comprising:
at least one laser; a coaxial optical lens group; a mirror group; a moving component; and a processing circuit, wherein
the laser is configured to emit laser light to the coaxial optical lens group;
the coaxial optical lens group comprises a lens, and the coaxial optical lens group is configured to perform beam shaping on the laser light and transmit the beam shaped laser light to the mirror group;
the mirror group is configured to reflect the laser light to a measured object;
the moving component is configured to drive the mirror group to adjust an emission angle of the laser light;
the mirror group is further configured to reflect, to the coaxial optical lens group, reflected light returned by the measured object;
the coaxial optical lens group is further configured to reflect the reflected light to a receiver;
the receiver is configured to receive the reflected light; and
the processing circuit is separately coupled to the laser and the receiver, and is configured to calculate a distance between the ranging system and the measured object based on the laser light and the reflected light.

2 . The ranging system according to claim 1 , wherein the coaxial optical lens group comprises a holed mirror;
the holed mirror comprises a holed region and an unholed region; the receiver is configured to receive the reflected light by using the unholed region; and the laser is configured to emit the laser light to the holed region.

3 . The ranging system according to claim 1 , wherein the coaxial optical lens group is configured to perform beam shaping on the reflected light.

4 . The ranging system according to claim 1 , wherein a plurality of the lasers are installed on a circuit board.

5 . The ranging system according to claim 4 , wherein the plurality of lasers are installed on the circuit board in an arc shape.

6 . The ranging system according to claim 1 , wherein the moving component comprises a motor and a turntable; and
the turntable is installed on a rotation shaft of the motor, and the mirror group is installed on the turntable and is configured to drive the mirror group to rotate.

7 . The ranging system according to claim 1 , wherein the mirror group comprises a plurality of mirrors, and the laser light reaches the measured object after being reflected by the plurality of mirrors.

8 . The ranging system according to claim 1 , wherein the laser or the receiver is installed on a circuit board in a form of a packaged component or a bare die chip.

9 . The ranging system according to claim 1 , wherein the processing circuit is configured to calculate the distance between the ranging system and the measured object based on an emission time point of the laser light, a receiving time point of the reflected light, and a speed of light.

10 . A mobile platform comprises:
a ranging system; and a vehicle body, wherein the vehicle body comprises a controller, the controller communicating with the ranging system, and being configured to: receive a distance measured by the ranging system, and control the vehicle body based on the distance; and the ranging system comprises:
at least one laser, a coaxial optical lens group, a mirror group, a moving component, and a processing circuit,
wherein the laser is configured to emit laser light to the coaxial optical lens group,
wherein the coaxial optical lens group comprises a lens, and the coaxial optical lens group is configured to perform beam shaping on the laser light and transmit the beam shaped laser light to the mirror group,
wherein the mirror group is configured to reflect the laser light to a measured object,
wherein the moving component is configured to drive the mirror group to adjust an emission angle of the laser light,
wherein the mirror group is further configured to reflect, to the coaxial optical lens group, reflected light returned by the measured object,
wherein the coaxial optical lens group is further configured to reflect the reflected light to a receiver,
wherein the receiver is configured to receive the reflected light, and
wherein the processing circuit is separately coupled to the laser and the receiver, and is configured to calculate a distance between the ranging system and the measured object based on the laser light and the reflected light.

11 . The mobile platform according to claim 10 , wherein the ranging system is disposed on a head, a tail, a side, or a top of the vehicle body.

12 . The mobile platform according to claim 10 , wherein the controller is configured to control, based on the distance, the vehicle body to move.

13 . The mobile platform according to claim 10 , wherein the controller is configured to generate a navigation route based on the distance.

14 . The mobile platform according to claim 13 , wherein the controller is connected to a display to display the distance or the navigation route.

15 . The mobile platform according to claim 10 , wherein the distance is a distance between the vehicle body and an obstacle; and
when the distance is less than a preset threshold, the controller is configured to control the vehicle body to move in a direction away from the obstacle.

16 . The mobile platform according to claim 15 , wherein the moving component comprises a motor and a turntable; and
the turntable is installed on a rotation shaft of the motor, and the mirror group is installed on the turntable and is configured to drive the mirror group to rotate.

17 . The mobile platform according to claim 15 , wherein the mirror group comprises a plurality of mirrors, and the laser light reaches the measured object after being reflected by the plurality of mirrors.

18 . The mobile platform according to claim 15 , wherein the laser or the receiver is installed on a circuit board in a form of a packaged component or a bare die chip.

19 . The mobile platform according to claim 15 , wherein the processing circuit is configured to calculate the distance between the ranging system and the measured object based on an emission time point of the laser light, a receiving time point of the reflected light, and a speed of light.

20 . The mobile platform according to claim 15 , wherein the coaxial optical lens group is configured to perform beam shaping on the reflected light.

Assignees

• Huawei Tech Co Ltd

Inventors

• Hu Chihao
• Yan Lei
• Xiong Wei
• Huang Ke

Classifications

• G01S17/931 Primary

  of land vehicles · CPC title

• G01S7/51

  Display arrangements · CPC title

• G01S7/4817

  relating to scanning · CPC title

• G01S7/4812 Primary

  transmitted and received beams following a coaxial path · CPC title

• G01S7/4815

  using multiple transmitters · CPC title