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. 03, 1999
Filed:
May. 19, 1998
Applicant:
Inventors:
Assignee:
Daifuku Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73116 ; 73660 ; 701111 ;
Abstract
A failure diagnosis system for automobile engines comprises an inverter motor (6) connected to a rotary shaft of an engine to be measured (2) and intended to rotate the engine (2), a microphone (8) for detecting an engine sound of the engine to be measured (2), a digital tape recorder for recording therein the engine sound detected by the microphone and an engine failure detector for extracting characteristics of the engine sound from the engine sound recorded in the recorder by a wavelet transform so as to detect a failure of the engine by the characteristics of the engine sound.