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Intruder detection systemAn intruder detection system is described. The system contains a transmitter which sends a frequency modulated and amplitude modulated signal to a remote receiver in response to a geophone detector which responds to seismic impulses created by the intruder. The signal makes it possible for an operator to determine the number of intruders and the manner of movement.
Document ID
19730016433
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Lee, R. D. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 7, 2013
Publication Date
March 6, 1973
Subject Category
Communications
Report/Patent Number
Patent Number: NASA-CASE-ARC-10097-2
Patent Application Number: US-PATENT-APPL-SN-768662
Patent Number: US-PATENT-3,719,891
Patent Application Number: US-PATENT-APPL-SN-115083
Accession Number
73N25160
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-ARC-10097-2|US-PATENT-3,719,891
Patent Application
US-PATENT-APPL-SN-768662|US-PATENT-APPL-SN-115083

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