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Method and device for measuring the thickness of non-circular, elongated workpieces which are advanced in the direction of their longitudinal axis and which have an arbitrary and changing angular position
Method and device for measuring the thickness of non-circular, elongated workpieces which are advanced in the direction of their longitudinal axis and which have an arbitrary and changing angular position
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机译:测量非圆形细长工件的厚度的方法和装置,这些工件沿其纵轴方向前进并具有任意且变化的角度位置
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摘要
The method involves measuring simultaneously the thickness of the workpiece. Three measurement system s (x,y,z), which are pivoted in common about the longitudinal axis of the workpiece (22b), measure its thickness (d1,d2,d3) along the measurement axes (principal and minor axes) over a specific pivoting angle range. The three measurement are offset from one another by a small angle. A computer determines maximum or minimum values for the values measured. The measurement system is then pivoted into a position (measurement zero position) in which on the measurement axis of the middle measurement system (principal axis) a minimum or a maximum value results. Using a computer algorithm the relationship between the three measurements of the three systems is determined. Then the amount by which the angular position of the maximum or minimum has changed and how great the maximum or minimum is in the changed angular position, is calculated and in which direction of rotation the change in the angular position has taken place
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