Title: A capacitance-type measuring device for absolute measurement of positions
Application Number: 93107991 Application Date: 1993.06.25
Publication Number: 1084268 Publication Date: 1994.03.23
Approval Pub. Date: 1997.10.01 Granted Pub. Date: 1997.10.01
International Classifi-cation: G01B7/02;G01D5/24;G01R27/26
Applicant(s) Name: Mitutoyo Corporation Address:
Inventor(s) Name: Toshitaka Shimomura;Satoshi Adachi;Toru Yaku
Attorney & Agent: ZHANG ZHIXING MA TIELIANG
Abstract:
    A capacitance-type measuring device for absolute measurement of positions is disclosed, which comprises a displacement sensor having a fixed element and a movable element, the movable element being capacitance-coupled to the fixed element and relatively movable against the fixed element, the displacement sensor being adapted to output signals corresponding to relative positions of the movable element against the fixed element, a signal processing circuit for processing the output signals of the displacement sensor and outputting an absolute measurement value corresponding to displacement of the movable element against the fixed element, a control circuit for controlling the operations of the displacement sensor and the signal processing circuit, and a power supply for supplying electric power to the displacement sensor, the signal processing circuit, and the control circuit, wherein the control circuit activates the signal processing circuit at a suitable interval so as to perform an intermittent measurement operation.
Time: 6