Radar sensor, automobile and target direction identification method

A radar sensor and target technology, applied in the field of radar sensors, can solve the problems of increasing the complexity of the optical receiving unit of the radar sensor in the number of photodetectors, increasing the system cost, and the inability of a single photodetector to identify the target, and achieving easy implementation and promotion. Application, lower hardware cost, simple and reliable identification method

Active Publication Date: 2012-10-24
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, the prior art proposes a method of splitting a single laser beam generated by a single laser into three beams of laser light with a certain divergence angle, and projecting the three beams of laser light on three different fronts of the vehicle, namely left, center and right. space area in order to realize the scheme of detecting targets in a large area in front of the vehicle. The cost of this scheme is lower than that of laser non-scanning radar sensors. A single photodetector cannot identify the orientation of the target. T

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  • Radar sensor, automobile and target direction identification method
  • Radar sensor, automobile and target direction identification method
  • Radar sensor, automobile and target direction identification method

Examples

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Example Embodiment

[0051] Example 1:

[0052] like figure 1 As shown, in this embodiment, the radar sensor includes an optical transmitting unit, an optical receiving unit and a processing unit.

[0053] Wherein, the optical emitting unit is used to emit a single laser beam and can divide it into three laser beams. In this embodiment, the projection areas of the three laser beams are arranged in sequence; the optical receiving unit is used to receive the three laser beams. The target return light signal reflected by the projection area of ​​the laser, and the received target return light signal is converted into a corresponding electrical signal; the processing unit is connected with the optical receiving unit for receiving the electrical signal and analyzing it to The azimuths of the targets within the projection areas of the three laser beams are obtained. Preferably, the projection areas of the three laser beams do not overlap in space, and the projection areas of the three laser beams are ...

Example Embodiment

[0100] Example 2:

[0101] The difference between this embodiment and embodiment 1 is:

[0102] In the optical receiving unit of the radar sensor, the field of view area 4 of the first condensing lens covers the projection area 1 of the first laser and the projection area 2 of the second laser, and the field of view 5 of the second condensing lens covers the first The projection area 1 of the laser light and the projection area 3 of the third laser light are all covered. That is, the field of view area of ​​each condensing lens can completely cover the projection areas of two adjacent laser beams among the three laser beams.

[0103] Other methods, structures, and functions in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a radar sensor which comprises an optical transmitting unit and an optical receiving unit. The optical transmitting unit is used for transmitting a single laser beam and can divide the single laser beam into three laser beams, the optical receiving unit is used for receiving reflected target light echo signals of the three laser beams in a projection area, and consists of two optical receiving modules, and each optical receiving module is used for receiving the reflected target light echo signals of the corresponding two adjacent laser beams of the three laser beams in the projection area. Correspondingly, the invention further provides a target direction identification method implemented by the aid of the laser sensor and an automobile comprising the laser sensor. Compared with the prior art, the laser sensor is simple in structure and low in hardware cost, and targets within a large-range area in front of the automobile can be identified.

Description

technical field [0001] The present invention specifically relates to a radar sensor, a car including the radar sensor, and a method for identifying azimuth of a target. Background technique [0002] With the continuous improvement of people's requirements for safety and comfort during driving, radar sensors are widely used in cars. Radar sensors are generally used in automobiles to measure the orientation of other targets around the vehicle (that is, other vehicles, pedestrians and other obstacles), as well as the relative distance and relative speed between the vehicle and other surrounding targets, so as to measure the distance between the vehicle and other surrounding targets. When there is a risk of collision, the driver can be reminded to brake in time, and when the driver does not respond or an unavoidable collision occurs, the vehicle braking system can be notified in time to automatically perform the brake, so as to avoid collision or reduce the degree of collision. ...

Claims

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Application Information

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IPC IPC(8): G01S17/93G01S17/06
Inventor 徐海峰刘翔宇
Owner CHERY AUTOMOBILE CO LTD
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