Modeling and parameters analysis of vision measuring sensor

In order to improve the measurement precision for visual measuring system, coordinate measuring mathematical models of two typical vision sensor systems of a line-structured light visual sensor and a symmetrical binocular visual sensor are investigated with the trigonometric method. The relationship characteristics between measuring errors and structure parameters of the line structured light vision sensor and symmetric binocular stereo vision sensor are detailed analyzed based on error analysis theory in this paper. Through analyzing the relations between the coordinate measuring models and the structural parameters of visual sensor systems, the effect of the visual sensor structural parameters on the sensor measurement accuracy is probed. The error analysis explicitly illustrates the dependence of the visual sensor accuracy on the sensor structural parameters. Lastly, On the basis of the comprehensive consideration for designing an ideal visual sensor, the optimum rules of structural parameters are proposed, and the general design principles and methods of the two typical sensors are derived.