Camera time delay measurement system and method

Abstract

The invention discloses a camera time delay measurement system and method, and the system comprises a stepping motor and a controller, the controller is electrically connected with the stepping motor through a motor driving module, an output shaft of the stepping motor is coaxially provided with a rotating disc, the rotating disc is opposite to a to-be-measured camera, and the rotating disc is fixedly provided with an optical position marker; an image signal output end of the camera is connected to the calculation unit; the controller is in communication connection with the calculation unit, the calculation unit automatically sends a shooting starting signal to the controller at the shooting moment, and the controller records the real-time position of the optical position marker at the moment according to the signal; the controller drives the stepping motor through the motor driving module to drive the rotating disc to rotate at a constant speed according to a preset angular speed omega, and the camera shoots images of the rotating disc. The time delay t = beta / omega is measured according to the angular displacement beta between the real-time position of the optical position marker at the shooting moment and the position of the optical position marker in the turntable image and the angular velocity omega of the turntable. The method is simple in measurement and high in precision.

Description

technical field [0001] The invention relates to a camera delay measurement system and method, belonging to the technical field of automatic driving. Background technique [0002] At present, high-precision visual positioning has been realized in the underground parking lot. In order to further improve the positioning accuracy, the time delay of the camera needs to be known, and then combined with the vehicle motion to compensate. [0003] In the application scenario of automatic driving, the camera delay is provided to better synchronize the vehicle information and the output results of the camera. The camera output result can be a positioning result or a detection result. After considering the time delay, the actual camera location can be traced back, so that the more accurate position of the object detected by the camera can be calculated in combination with the vehicle's trajectory, and the position has an interval caused by time delay relative to the current position, ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the technical problem that the time delay measured by the current camera time delay measurement method is not the real time delay required for positioning and the measurement accuracy is not enough

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