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:
Aug. 04, 2015
Filed:
May. 03, 2012
Wen He, Hangzhou, CN;
Chunyu Wang, Hangzhou, CN;
Runjie Shen, Hangzhou, CN;
Shushi Jia, Hangzhou, CN;
Mei Yu, Beijing, CN;
Mingde MA, Beijing, CN;
Wen He, Hangzhou, CN;
Chunyu Wang, Hangzhou, CN;
Runjie Shen, Hangzhou, CN;
Shushi Jia, Hangzhou, CN;
Mei Yu, Beijing, CN;
Mingde Ma, Beijing, CN;
ZHEJIANG UNIVERSITY, Hangzhou, Zhejiang Province, CN;
NATIONAL INSTITUTE OF METROLOGY P. R. CHINA, Beijing, CN;
Abstract
The vibration exciter system with a feedback control unit based on an optical linear encoder includes a vibration exciter, a signal generator and a power amplifier. The exciter system further comprises an optical linear encoder converting the displacement of moving component of the exciter into A/B pulse with a phase difference of 90° , a filtering, shaping and level translator unit converting the A/B pulse into standard pulse with standard shape and level, a subdivider and orientation recognizer unit refining standard pulse and recognizing the moving orientation, an analog converter unit converting refined standard pulse into analogue signal that reflects the displacement of the moving component. The standard signal outputted by the signal generator and the converted analogue signal are inputted into a subtracter as the minuend and subtrahend respectively. The output of the subtracter is inputted into the power amplifier and then into the vibration exciter as a driving signal.