Motion Parameters Measurement of Rigid Body Based on Laser Beams

In this paper we address the problem of motion parameters measurement of rigid body. A special optical cooperative target is designed and mounted on the rigid body, while the laser is projected to a reception planes, the laser spot on the reception plane is captured by camera and located using the moments method, the camera is calibrated using a large size calibration target be fabricated in the field, the three-dimensional(3D) coordinate is measured by the camera of calibrated, image points of laser spot and the reception planes, and the motion parameters is calculated with the feature plane's normal vector of laser beams in the rigid body's coordinate frame and the world coordinate frame. The Numerical simulations and experiments results demonstrate that this measuring method based on laser beams can achieve the precision what attitude is 0.04 degree and position is 4mm, and wide range of measurement for the motion parameters of the rigid body.