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. 30, 2002
Filed:
Nov. 07, 2000
Shen-Tai Liaw, Taipei, TW;
Chien-Rong Huang, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An ultrasonic cleaning device fault detector, comprising an ultrasonic wave converter, an amplifier, a band-pass filter, and an integrator. The ultrasonic wave converter operates at the same central frequency as the ultrasonic cleaning device and is able to sense the intensity of ultrasonic waves generated by the ultrasonic cleaning device and to produce an analog signal therefrom. The amplifier amplifies the analog signal generated by the ultrasonic wave converter. The band-pass filter filters out noise in the analog signal, eliminating electric noise and other external noise that are sensed by the ultrasonic wave converter. The integrator converts the analog signal cleaned in the band-pass filter into an electric voltage digital signal output, thereby indicating whether the vibrating device of the ultrasonic cleaning device is working properly.