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Online approach to measuring relative location of spatial geometric features of long rotating parts
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NSTL
Elsevier
Online relative location measurement of spatial geometric features is necessary for the high-precision manufacturing of long rotating parts. However, existing methods are imperfect because they are limited by the rotation state of the measured object or the measurement allowable space. To solve these problems, this study proposes a robust online measurement approach based on angle and size transfer, size transfer and analytical geometry theories. A polyhedral prism is used to synchronously calibrate the zero position of the laser displacement sensor, then a geometric model of the rotation angle corresponding to the sensor displacement change is established. Using only the displacement data, the 3-D relative location of multiple geometric features on different parallel planes is deduced by analytical geometry theory. The phase angle measurement of a diesel engine camshaft was used to verify the method. The results show that the method has high measurement precision, good stability and high efficiency.
NSTL
Elsevier
