High Precision Real-time Angle Measurement Method with Three Degrees of Freedom
Due to the existence of a certain width and non-uniformity in the cross hair slit image produced by a three degree of freedom measurement system based on an autocollimator,the accuracy of the three degree of freedom measurement is not high.This paper proposes a high-precision three degree of freedom measurement method based on the combination of cross hair thinning and Hough transform.The experimental results show that the standard deviation of the pitch angle is 2.69"in the measurement range of±600"using a three degree of freedom measurement method combining cross hair thin-ning and Hough transform;The standard deviation of the yaw angle is 2.28";the standard deviation of the roll angle is 12.58".The measurement accuracy of the three degrees of freedom is higher than that of using only the cross hair thinning process or using only the Hough transform to calculate the three degrees of freedom,which verifies the effectiveness and feasibility of the method proposed in this article.
three degrees of freedom measurementautocollimatorCMOS image sensorFPGAimage processing
NETL
NSTL
万方数据
维普
