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Microphone Phased Array Machinery Fault Diagnostic System

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
2005 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
AVEC, Inc.
AVEC, INC. 3154 STATE ST, STE 2230 BLACKSBURG, VA 24060-6474
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Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
Phase 1
Fiscal Year: 2005
Title: Microphone Phased Array Machinery Fault Diagnostic System
Agency / Branch: DOD / USAF
Contract: FA9101-05-M-0037
Award Amount: $88,844.00


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.

Principal Investigator:

Patricio Ravetta
Research Engineer

Business Contact:

Ricardo Burdisso
Small Business Information at Submission:

306 Seminole Dr. Blacksburg, VA 24060

EIN/Tax ID: 743030669
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No