Accession Number : ADP001533

Title :   Inertial Guidance and Underwater Sound Detection Using SAW Sensors,

Corporate Author : ROCKWELL INTERNATIONAL THOUSAND OAKS CA MICROELECTRONICS RESEARCH AND DEVELOPMENT CENTER

Personal Author(s) : Staples,E. J. ; Wise,J. ; Andrews,A. P.

Report Date : 1982

Pagination or Media Count : 6

Abstract : This paper examines the use of SAW sensors for inertial guidance and underwater sound detection. In the detection of underwater sound, dynamic rather than static loading of the SAW crystal takes place resulting in information carrying sidebands in the SAW oscillator spectrum. Studies have shown that the sensitivity of prototype sensors in terms of signal-to-noise is at least equal to that of conventional hydrophones. As an accelerometer, the SAW sensor provides high accuracy, a large dynamic range (10 to the sixth power), and a digital output without using analog-to-digital conversion. Using relatively simple digital processing techniques, the accelerometer output can provide inertial information such as velocity and displacement. Studies of the integrated error rates for SAW accelerometers have shown that they can consistently provide error rates less than a nautical mile per hour. The SAW oscillator sensor is a promising candidate for high performance, moderate cost sensor applications.

Descriptors :   *Frequency, *Control, *Symposia, *Surface acoustic waves, *Detectors, Inertial guidance, Underwater sound, Acoustic detection, Oscillators, Crystals, Crystal oscillators, Static loads, Sidebands

Distribution Statement : APPROVED FOR PUBLIC RELEASE