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. 19, 1997
Filed:
Feb. 22, 1996
Seiji Okada, Yokohama, JP;
Toshimi Okazaki, Yokohama, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A stress is detected by the utilization of a semiconductor equipped with a beam oscillator which is driven to generate a compound oscillation comprising a plurality of component oscillations with different component frequencies through the steps of detecting separately component amplitudes of the compound oscillation for the respective component frequencies, standardizing power spectra of the component amplitudes with theoretically obtained reference power spectra respectively, and determining a stress generated in the beam oscillator based on a mean stress value of stress values for the standardized power spectra from relations between power spectrum and stress value previously provided for the respective component amplitudes.