1998 Volume 64 Issue 617 Pages 336-341
It is well known that shape profiles can be measured by the serial three point method with three displacement sensors. This method, however, has disadvantages in that it is difficult to modify the interval between sensors and the accidental errors are accumulated. In this work, these disadvantages have been overcome by application of smoothing and a weighted least squares method to the conventional serial three point method for measuring circular profiles. The effectiveness of the improved method has been explained theoretically and examined by computer simulation and experiment.