U.S. flag

An official website of the United States government, Department of Justice.

NCJRS Virtual Library

The Virtual Library houses over 235,000 criminal justice resources, including all known OJP works.
Click here to search the NCJRS Virtual Library

Mathematical Model for the Minimum Detectable Effective Cross-Section for an Ultrasonic Motion Sensor (UMS) (From Carnahan Conference on Security Technology, P 131-136, 1987, John S. Jackson and R. William De Vore, eds. -- see NCJ-118105)

NCJ Number
J A Rarick
Date Published
6 pages
This paper develops a theoretical model for the minimum detectable effective cross-section for an ultrasonic motion sensor (UMS).
The model is developed based on minimum detectable power or where power is assumed to be within the frequency band defined as an alarm condition. A theoretical view of the effect of an isotropically radiating target versus a specularly reflecting target is also presented. 4 figures, 39 formulas. (Author abstract modified)