DEVELOPMENT OF A FIBER-OPTIC CHAMBER PRESSURE TRANSDUCER

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$479,474.00
Award Year:
1992
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
15948
Agency Tracking Number:
15948
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
21414 - 68th Ave S, Kent, WA, 98032
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Peter H -t Liu
Principal Investigator
(206) 872-9500
Business Contact:
() -
Research Institute:
n/a
Abstract
A FIBER-OPTIC PRESSURE TRANSDUCER (FOPT) BASED ON PATENTED FIBER-OPTIC SENSING METHODS WILL BE DEVELOPED FOR USE IN PRESSURE CHAMBERS AT PRESSURES FROM 50,000 TO 120,000 POUNDS PER SQUARE INCH. THE FOPT, OPERATING IN EITHER THE AMPLITUDEOR PHASE-MODULATION MODE, WILL DETECT THE DISPLACEMENT OF A DIAPHRAGM AS A MEASURE OF THE EXTERNAL PRESSURE. THE FOPT WOULD HAVE VERY HIGH RESONANT FREQUENCY TO ACHIEVE A FREQUENCY RESPONSE OF BETTER THAN 150 KHZ. UNLIKE THE PIEZOELECTRIC TRANSDUCER, THE FOPT WILL MEASURE THE STATIC RATHER THAN THE DYNAMIC PRESSURE. OPTICAL SENSING VIA A FIBER-OPTIC LINK WILL ISOLATE THE ELECTRONICS FROM THE HOSTILE ENVIRONMENT AND ALLEVIATE ELECTRONIC DRIFT DUE TO INTERFERENCE FROM STRONG ELECTROMAGNETIC AND RADIO FREQUENCY FIELDS AND/OR TEMPERATURE VARIATIONS. THE PROPOSED DEVELOPMENT EFFORT WILL BE AN EXTENSION OF AN ONGOING ARMY-SPONSORED SBIR PHASE II PROGRAM TO DEVELOP AN FOPT FOR PRESSURE MEASUREMENTS UP TO 100,000 PSI IN GUN-BARREL ENVIRONMENTS. FOR THAT APPLICATION, SPECIAL SENSOR CONFIGURATIONS WERE DESIGNED EMPLOYING A FINITE ELEMENT ALGORITHM IN ORDER TO AVOID CONCENTRATION OF LOCAL STRESS POTENTIALLY EXCEEDING THE YIELD STRENGTH OF AVAILABLE ALLOYS. THE PROPOSED EXTENSION 120,000 PSI IS BY NO MEANS TRIVIAL. THE KEYS TO THE SUCCESS OF THE PROPOSED DEVELOPMENT WILL BE INNOVATIVE DESIGN OF THE SENSOR CONFIGURATION USING A HIGH-STRENGTH/LOW-MODULUS MATERIALS AS WELL AS STABILIZATION OF THE LIGHT SOURCE.

* information listed above is at the time of submission.

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