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:
Oct. 29, 2002
Filed:
Mar. 07, 2001
Tetsuro Maruyama, Shizuoka, JP;
Suzuki Motor Company, Shizuoka, JP;
Abstract
To enable vibration conditions of a measured object to be measured with high accuracy independently of a laser oscillating wavelength. A vibration measuring means includes a laser resonator for oscillating a laser beam and generating beat waves through self-mixture of a returning beam obtained when the oscillated emitted beam is reflected by the measured object with a beam oscillated and emitted when the returning beam is received, a modulated beat frequency generation controller for providing the beat waves with a modulated beat frequency that is higher than a Doppler frequency that is superposed on the returning beam while varying depending on a speed of the measured object, and a signal processor for executing signal processing on the beat waves generated by the self-mixture in the laser resonator and outputting a result of the processing as vibration information. The signal processor comprises a vibration information generator for generating vibration information from the beat waves by defining variations in the frequency of the beat waves as variations in frequency from a modulated beat frequency by the amount of a Doppler frequency.