Automobile and vehicle-mounted radar calibrating method and device

Abstract

The invention discloses an automobile and a vehicle-mounted radar calibrating method and device. The calibrating method comprises the following steps that the speed of the automobile, the turning angle of a steering wheel of the automobile and the acceleration of the automobile are obtained; whether the automobile is in a uniform-speed linear motion state is determined according to the speed, turning angle and acceleration; if YES, the movement relation of a preset target relative to the automobile is obtained; and a vehicle-mounted radar is calibrated according to the movement relation. According to the calibration method, an extra reference device is not needed, the calibration error is low, a calibration manner is convenient, and the environment adaptability is high.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a vehicle radar calibration method, a vehicle radar calibration device and a vehicle. Background technique [0002] At present, the calibration of most millimeter-wave radars requires an additional reference device, which can be a reflector, a millimeter-wave transceiver or a laser transceiver, which compares the measured value with the true value of the reference position fed back by the radar to be tested, or After directly measuring the installation deviation of the radar structure to be tested, the parameters are calibrated. [0003] In the related art, a method for realizing the above parameter calibration by using an additional reference device is described. The device has a cone fixed at a reference position (such as figure 1 As shown), the design position is the theoretical value; after the vehicle with the radar to be tested is parked at the standard position, the relative p...

AI Technical Summary

Problems solved by technology

Using this method for calibration, the placement deviation of the cone-shaped reference device and the deviation when the vehicle to be tested is parked will increase the error of the calibration result;

[0006] 2) poor comfort

This method requires a specially arranged calibration site to complete the radar calibration, and re-calibration may require the vehicle to return to the calibration factory;

[0007] 3) Not adaptable to the environment

During the operation of the vehicle, the transmission beam deviates from the design direction caused by collision, stone impact, snow cover, ice accumulation, etc., which may not be detectable by the naked eye so that the user does not arrange recalibration, but the actual use has affected the accuracy of radar identification

[0008] In addition, other related technologies, such as the method of directly measuring the installation error of the radar structure to be tested by using a laser transceiver, have the disadvantages of high calibration costs and complicated procedures in addition to poor adaptability

Images