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:
Feb. 22, 1994
Filed:
Jul. 20, 1990
Applicant:
Inventors:
Yakichi Higo, Meguro-ku, Tokyo, JP;
Junichiro Matsuoka, Machida, JP;
Jun Kiyoshige, Atsugi, JP;
Kazuhiko Tsukaguchi, Sagamihara, JP;
Shigenori Kazama, Yokohama, JP;
Assignees:
Nissan Motor Company, Limited, Yokohama, JP;
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364508 ; 364553 ; 73801 ; 73806 ;
Abstract
Stress in a substance is measured by utilizing the transfer characteristics of elastic waves, such that elastic waves input to a substance are displaced by the stress load within the substance. Waves input to the substance and output therefrom by transmission or reflection are compared by fast fourier transform analysis, obtaining a wave attenuation factor quantifying the magnitude of stress in the substance.