MEASURING METHOD FOR CLEARANCE BETWEEN PLURAL MEMBERS

摘要

PURPOSE:To enhance computing accuracy by computing a calibration distance as the quantity of dislocation between the optical axes of a first and a second camera based on the difference between a first distance from a reference line to the reference point of a calibration member and a second distance from the reference line to the reference point of the aforesaid calibration member. CONSTITUTION:Each calibration reference point 78d of calibration charts 78 is made to coincide with an assembly work position alpha. Each calibration chart 78 is photographed by the use of both of the first ITV camera 40g of a first position detection mechanism 40 and the second ITV camera 42g of a second position detection mechanism 42. These images are transferred to an image processing device via a first signal converter and a second signal converter respectively. And a distance x1 from the left end of a figure to the calibration reference point 78d is electrically measured based on the image photographed via the first ITV camera 40g, and a distance x2 from the left end of a figure to the calibration reference point 78d is electrically measured based on an image photographed via the second ITV camera 42g. And the value of x1-x2 shall thereby be made to be the quantity x of dislocation.