Patent ID: 9303970
Filing Date: 2016-04-05
CPC Classification: G01B,G01R

Claim Text:
1. A shape measuring instrument comprising: a measurer having a movable detector configured to detect a shape of a measured object and further configured to output a signal indicating results of the shape detection; a controller configured to receive the signal indicating the results of the shape detection; and a cable configured to transmit the signal indicating the results of the shape detection between the movable detector and the controller, and further configured to bend in accordance with displacement of the movable detector, wherein: the controller comprises an impedance detector configured to detect impedance in the cable, the impedance detector comprising a calculator configured to detect the impedance in the cable according to whether a reception confirmation signal is received through the cable, the reception confirmation signal being output from the movable detector when test data is transmitted through the cable to the movable detector and the movable detector receives the test data.