AN ELECTRONIC RETARD SENSOR FOR BOMB FUZES

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 12950
Amount: $49,947.00
Phase: Phase I
Program: SBIR
Awards Year: 1990
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Silicon Designs Inc
1445-nw Mall St, Issaquah, WA, 98027
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John C Cole
 (206) 391-8329
Business Contact
Phone: () -
Research Institution
N/A
Abstract
ALTHOUGH CONVENTIONAL MASS-SPRING RETARD SENSORS ARE INEXPENSIVE, THEIR POOR RELIABILITY USUALLY REQUIRES THE USE OF TWO DEVICES IN PARALLEL TO ASSURE SWITCH CLOSURE. THE USE OF TWO DEVICES, HOWEVER, HAS AN ADVERSE AFFECT ON S&A SAFETY. G-SWITCHES USED AS RETARD SENSORS IN THE FMU-139 BOMB FUZE ARE CURRENTLY A MAJOR PROBLEM AREA IN THAT PROGRAM. THEIR POOR RELIABILITY IS DUE PRIMARILY TO IMPERFECTIONS IN THE MACHINED SURFACES, CONTAMINATION, AND TOLERANCE STACK-UP WHICH CAUSE HIGH CONTACT RESISTANCE OR LACK OF OPERATION ALTOGETHER. SILICON DESIGNS HAS DEVELOPED A MINIATURE, LOW-COST ACCELEROMETER THAT COMBINES A CAPACITIVE SENSE ELEMENT AND INTEGRATED SENSE ELECTRONICS IN A SINGLE IC PACKAGE. WE HAVE ALSO DEVELOPED AN ACCELERATION THRESHOLD DETECTION CIRCUIT THAT CAN BE INTEGRATED WITH THE SENSE ELECTRONICS. BECAUSE OUR CURRENT ACCELEROMETER'S HYBRID-BASED CONSTRUCTION AND LASER-TRIM CALIBRATION METHOD IS TOO COSTLY FOR USE IN BOMB FUZES, WE PROPOSE TO REDESIGN THE CALIBRATION CIRCUITS SO ALL CIRCUIT FUNCTIONS CAN BE INTEGRATED ONTO A SINGLE CUSTOM IC ALONG WITH THE SENSE ELEMENT. WE HAVE DESCRIBED A BASE-LINE DESIGN FOR SUCH A CHIP IN THIS PROPOSAL. THE RESULTING ELECTRONIC RETARD SENSOR IC WOULD BE VERY RELIABLE DUE TO ITS FABRICATION USING IC TECHNOLOGY.

* information listed above is at the time of submission.

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