The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 2018
Filed:
Mar. 20, 2015
Advanced Sensor Technology Limited, Central, Hong Kong, CN;
Hans U. Meyer, Morges, CH;
Advanced Sensor Technology Limited, Tortola, VG;
Abstract
A capacitive position sensing system has a pickup electrode, a shield electrode partially enclosing the pickup electrode, and an essentially grounded relatively movable target near the pickup electrodes; a capacitance-to-digital converter, and switching means for connecting each electrode in turn to the converter input or to ground. A capacitive position sensing method in the system includes measuring a first capacitance Cof at least one pickup electrode set with the shield electrode set grounded, measuring a second capacitance Cof at least one shield electrode set with the pickup electrode set grounded, and measuring a third capacitance Cof the pickup electrode set and the shield electrode set connected together; and calculating a first result indicating a position of a target using the first capacitance C, the second capacitance Cand the third capacitance C