Mechanical vibrations of individual moving parts are sensed with piezoelectric accelerometers and measured electronically from outside the working machine

Tatge, R. B.

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NASA TECH BRIEF 
.
February 1970	 Brief 70-10116 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage commercial 
application. Tech Briefs are available on a subscription basis from the Clearinghouse for Federal Scientific and Technical 
Information, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Division, NASA, Code UT, Washington, D.C. 20546. 
Prediction of Faults in Components

of Machinery in Motion 
A vibration-analysis system has been designed to

detect incipient malfunction or failure of components

of functioning hydraulic systems; it is easily applicable

to all types of operating machinery. The mechanical

vibrations of individual moving components are

sensed with piezoelectric accelerometers and meas-

ured electronically from outside the working machine.

The data yielded are either analyzed directly or stored

' on tape and subsequently processed and analyzed for

indication of defective components that would lead

to ultimate failure unless corrective action were taken.
Note: 
The following documentation may be obtained 
from:
Clearinghouse for Federal Scientific 
and Technical Information 
Springfield, Virginia 22151 
Single document price $3.00 
(or microfiche $0.65) 
Reference: NASA-CR-99189 Study for

Maintenance of Hydraulic Motors 
Patent status: 
No patent action is contemplated by NASA. 
Source: R. B. Tatge of 
General Electric Company, Inc. 
under contract to 
Goddard Space Flight Center 
(G SC- 10801) 
Category 06 
This document was prepared under the sponsorship of the National
	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States
	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States
	 will be free fràm privately owned-rights.
https://ntrs.nasa.gov/search.jsp?R=19700000112 2020-03-17T00:26:27+00:00Z


Prediction of faults in components of machinery in motion

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