MUTUAL INDUCTIVE SENSING FOR IR SEEKERS

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 15529
Amount: $49,960.00
Phase: Phase I
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
12 Emily Street, Cambridge, MA, 02139
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Richard F Torti Phd
 Principal Investigator
 (617) 661-0540
Business Contact
Phone: () -
Research Institution
N/A
Abstract
AN INNOVATIVE APPLICATION OF THE POSITION DEPENDENCE OF THE MUTUAL INDUCTANCE BETWEEN TWO COILS IS PROPOSED FOR SENSING THE ROTATIONAL PARAMETERS REQUIRED BY A FREE GYRO SEEKER OF A MULTI-SPECTRUM GUIDANCESYSTEM. A SET OF SERIES RESONANT STATIC TRANSMITTING COILS EXCITE ONE OR MORE TUNED PASSIVE COILS MOVING WITH THE GYRO. THE ROTATIONAL POSITION AND ITS RATE OF CHANGE ARE DETERMINED FROM THE MEASURED COUPLING BETWEEN MOVING AND FIXED COILS. THIS IS ACHIEVED BY CORRELATING THE MUTUAL INDUCTANCE WITH THE ANGULAR SEPARATION BETWEEN THE TWO COILS. THE COMBINATION OF REAL TIME DATA OBTAINED FROM THE COMPLETE SETOF TRANSMITTERS CAN BE DIGITALLY DECONVOLUTED TO OBTAIN POSITION ANDRATE INFORMATION OR USED DIRECTLY WITH ANALOG PROCESSING. SINCE THE COUPLING IS A FUNCTION OF GEOMETRY, ARBITRARILY PRECISE POSITION DETERMINATIONS CAN BE MADE WITH A SUITABLE COMPLEMENT OF COILS AND RESONANT FREQUENCIES PROVIDING NOISE SUPPRESSION, SIGNAL PROCESSING, AND MECHANICAL TOLERANCES ARE COMPATIBLE. THE TECHNIQUE IS INHERENTLY NOISE DISCRIMINATING SINCE ULTRASONIC FREQUENCIES ARE USED IN RESONANTCIRCUITS, YET ESPECIALLY COMPATIBLE WITH THE OPTICS ASSOCIATED WITH IR DETECTING SYSTEM. FURTHER, THESE FREQUENCIES ALLOW KILOHERTZ DATARATES. IN PHASE I, A GEOMETRICALLY APPROPRIATE, RUDIMENTARY SENSOR WILL BE DESIGFIED AND TESTED IN A PROOF OF PRINCIPLE DEMONSTRATION.

* Information listed above is at the time of submission. *

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