Vehicle-mounted impulse type laser radar system

Abstract

The invention provides a vehicle-mounted impulse type laser radar system. The vehicle-mounted impulse type laser radar system comprises a laser transmitting circuit, three receiving circuits, three timing circuits and a processor. The laser transmitting circuit comprises a laser transmitter, a driving circuit of the laser transmitter, a spectroscope, a transmitting circuit photoelectric detector and an optical system. Each receiving circuit comprises an optical instrument, three converging lenses, three receiving circuit photoelectric detectors, and a signal conditioning circuit composed of two-stage amplifying circuits, filtering circuits and time discriminating circuits. The processor is electrically connected with the driving circuit and the three timing circuits and works out the distance between an obstacle in front of a vehicle and the vehicle and the direction of the obstacle according to the recorded laser flight time. According to the vehicle-mounted laser radar system of a three-path timing structure, within the range of 10 m in front of the vehicle, the distance between the obstacle in front of the target vehicle and the target vehicle can be accurately measured, and the direction of the obstacle in front of the target vehicle can be detected as well.

Description

technical field [0001] The invention relates to the field of automobile active safety, in particular to a vehicle-mounted pulse laser radar system. [0002] Background technique [0003] With the continuous improvement of people's requirements for the safety and comfort of automobile driving, the lidar ranging system is gradually being applied in the field of automobile active safety. The lidar system is generally used in automobiles to measure the distance or relative speed of other targets around the vehicle, so that when there is a risk of collision between the vehicle and other surrounding targets, the driver can be reminded in time to avoid collisions or reduce the risk of collisions. degree. The development trend of vehicle-mounted ranging radar in the future requires laser transmitters to be suitable for vehicle-mounted installations, that is, to be small in size and light in weight, suitable for use on vehicles, and most vehicle-mounted laser radar systems do not ...

AI Technical Summary

Problems solved by technology

[0004]The traditional detection method uses multi-line (or single-line) scanning laser radar to measure the target around the car. Although this detection method has high spatial resolution and Longer measuring distances, but not yet mass market acceptable due to their high cost

Using a single laser to generate a single beam of laser non-scanning method cannot achieve target detection in a large space area, and cannot meet the requirements for target detection in a large area around the car

Another way is to use multi-laser non-scanning detection, but this detection method will still significantly increase the system cost

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