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:
Jan. 18, 2022
Filed:
Oct. 28, 2019
Applicant:
Tokyo Parts Industrial Co., Ltd., Gunma-ken, JP;
Inventor:
Mamoru Kubo, Gunma-ken, JP;
Assignee:
Tokyo Parts Industrial Co., Ltd., Gunma-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 18/00 (2006.01); G01D 5/241 (2006.01); H03K 17/955 (2006.01); G01D 5/24 (2006.01);
U.S. Cl.
CPC ...
G01D 5/2405 (2013.01); G01D 18/00 (2013.01); G01D 5/241 (2013.01);
Abstract
The capacitive proximity sensor includes an oscillation means, an LCR resonance circuit including a sensor electrode, a sensor circuit that outputs a determination voltage signal corresponding to the capacitance of the sensor electrode, and a control unit that detects the proximity of a human body to the sensor electrode based on the determination voltage signal. The control unit performs control that alternatingly and repeatedly executes calibration steps for updating a detection frequency fand a first threshold value Vand a detection step for detecting the proximity of the human body to the sensor electrode.