测头成像视觉坐标测量系统组成,建模及求解

提出了一种新型视觉坐标测量系统－单摄像机测头成像视觉坐标测量系统。系统中采用目标测头作为成像目标，利用测头与被测表面接触，通过分析测头上已知特征点成像变化来实现对被接触点的三维坐标测量。这一测量新思路，不仅可以达到目前大多数视觉测量系统的测量目的，同时还可以实现对被遮挡表面的测量并具有较大测量范围。利用空间坐标变换及光学成像原理建立了这一视觉测量系统的非线性测量方程，并给出了利用Ｎｅｗｔｏｎ非线性

Probe imaging vision coordinate measuring system composing modeling and solving

The paper describes a new vision coordinate measuring system-probe imaging vision coordinate measuring system using a singe camera. The system applies an objective-probe as the imaging objective. Utilizing the objective-probe to contact with the measurement surface, by analyzing the imaging changes of the known characteristic points on the objective-probe, the system realizes the three-dimensional coordinate measurement of the contacted points. This new idea can realize not only most of the present vision coordinate measurement but also the measurement of hidden surfaces . At the same time, it has a lager measurement range. The paper sets up the nonlinear measurement equations of the vision coordinate measurement system by spatial coordinate translation and the optical imaging principle and describes the Newton nonlinear initiation method to resolve the measurement equations. The emulating experiments show that the measurement equations and the resolving methed are corrrct. Furthermore, the paper analyses the effect of the system resolution and different depth for measurement.