Microphone Phased Array Machinery Fault Diagnostic System

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9101-05-M-0037
Agency Tracking Number: F051-304-2398
Amount: $88,844.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2005
Solicitation Topic Code: AF05-304
Solicitation Number: 2005.1
Small Business Information
306 Seminole Dr., Blacksburg, VA, 24060
DUNS: 175964720
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Patricio Ravetta
 Research Engineer
 (540) 357-1093
Business Contact
 Ricardo Burdisso
Title: President
Phone: (540) 357-1093
Email: avec_inc@verizon.net
Research Institution
A microphone phased array machinery fault diagnostic system is proposed. In this system, a microphone phased array is positioned such as to have a direct line of sight to the machine to be monitored. The microphone signals are recorded simultaneously and used to scan or beamform over a grid enclosing the machine to capture its acoustic signature. The acoustic image is then integrated to obtain a machine noise spectrum that is used to identify damage or faults by an automated expert system. The architecture of the proposed fault diagnostic system consists of two main separated physical subsystems. The first subsystem consists of the microphone phased array, data acquisition system, and a computer to generate the cross spectral matrix of the microphone signals. This component is a single physical unit mounted in the industrial plant. The cross spectral matrix is then transferred through a wireless link to the second subsystem which is a computer cluster to perform the beamforming, integration, and fault diagnostic of the equipment. These two subsystems are two distinct hardware setups interconnected through a wireless link, i.e. they are not physically connected.

* information listed above is at the time of submission.

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