Articulated probe for three dimensional displacement measurement - is controlled by position motors and has two dimensional position transducer

摘要

The articulated probe is for three dimensional displacement inspection and measurement, especially for control surface inspection, in which the probe head is controlled independently in two dimensions over small excursions by independent control circuits so that no spring energy is stored. The probe head (1) is mounted on a two axis bearing arrangement, with independent position control motors (5, 6) and a two dimensional position transducer consisting of a light beam (9) and photodiode detector array (7). The whole arrangement is mounted in a fork shaped mount (2) on the head of the inspection machine. The probe (1) tip (10) can thus move independently in two axes under the control of the two circuits. The electrical stepping motors has a defined null position in its connection with the pick-up.