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:
Mar. 16, 2021
Filed:
Jul. 20, 2018
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Abstract
A moisture amount detection device includes: a light source that projects light that flickers at a predetermined frequency toward an object; a light receiver that receives the light reflected by the object and outputs a detection signal; an amplifier that outputs an amplified signal obtained by amplifying the detection signal by a predetermined amplification factor; a lock-in amplifier that outputs an extracted signal obtained by extracting a signal of a predetermined frequency from the amplified signal; an A/D converter that performs A/D conversion on the extracted signal, and outputs a digital signal; a second low-pass filter whose passband is changeable, and that allows a signal of a frequency in the passband in the digital signal to pass therethrough; and a controller that performs first control to change the passband according to a signal intensity indicated by the digital signal.