Experimental study on curve-baffle characteristics of pneu-pin sensor with differential pressure

摘要

This paper presents the design and working principle of a pneu-pin sensor based on a gas path with differential pressure, and the study on its curve-baffle characteristics. The measurement range of the sensor is about 32 m, with a resolution of 0.03 m and less than an uncertainty of 0.3 m. It is found through research on the curve-baffle characteristics with different curvature radius of steel balls that the axis of the pneumatic probe does not need to go through the geometric centre of work-piece, and so, the high accuracy positioning of the work-piece is avoided. Therefore, the pneumatic measurement technology researched in this paper can be applied to high accuracy non-contact dimension of measurement of different curvature radius of work-pieces.