Seismic intrusion detector system

Hawk, Hervey L; Hawley, James G; Portlock, John M; Scheibner, James E

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A - human necessities
A01 - agriculture
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G - physics
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Title: Seismic intrusion detector system

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Abstract

A system for monitoring man-associated seismic movements within a control area including a geophone for generating an electrical signal in response to seismic movement, a bandpass amplifier and threshold detector for eliminating unwanted signals, pulse counting system for counting and storing the number of seismic movements within the area, and a monitoring system operable on command having a variable frequency oscillator generating an audio frequency signal proportional to the number of said seismic movements.

Inventors:

Hawk, Hervey L ^[1]; Hawley, James G ^[1]; Portlock, John M ^[1]; Scheibner, James E ^[1]

Albuquerque, NM

Issue Date:: 1976-01-01

Research Org.:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

OSTI Identifier:: 862663

Patent Number(s):: 3984803

Assignee:: United States of America as represented by United States Energy (Washington, DC)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS

G - PHYSICS G08 - SIGNALLING G08B - SIGNALLING OR CALLING SYSTEMS

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G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
G01V1/001 - {Acoustic presence detection

G - PHYSICS G08 - SIGNALLING G08B - SIGNALLING OR CALLING SYSTEMS
G08B13/1663 - {using seismic sensing means}

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DOE Contract Number:: AT(29-1)-789

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: seismic; intrusion; detector; monitoring; man-associated; movements; control; including; geophone; generating; electrical; signal; response; movement; bandpass; amplifier; threshold; eliminating; unwanted; signals; pulse; counting; storing; operable; command; variable; frequency; oscillator; audio; proportional; signal proportional; variable frequency; electrical signal; frequency signal; pulse counting; audio frequency; intrusion detector; threshold detector; frequency oscillator; seismic movement; pass amplifier; /367/340/

Citation Formats


                    Hawk, Hervey L, Hawley, James G, Portlock, John M, and Scheibner, James E. Seismic intrusion detector system.  United States: N. p., 1976. 
        Web.

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                    Hawk, Hervey L, Hawley, James G, Portlock, John M, & Scheibner, James E. Seismic intrusion detector system.  United States.

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                    Hawk, Hervey L, Hawley, James G, Portlock, John M, and Scheibner, James E. Thu .  
        "Seismic intrusion detector system".  United States.  https://www.osti.gov/servlets/purl/862663.

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@article{osti_862663,

  title        = {Seismic intrusion detector system},

  author       = {Hawk, Hervey L and Hawley, James G and Portlock, John M and Scheibner, James E},

  abstractNote = {A system for monitoring man-associated seismic movements within a control area including a geophone for generating an electrical signal in response to seismic movement, a bandpass amplifier and threshold detector for eliminating unwanted signals, pulse counting system for counting and storing the number of seismic movements within the area, and a monitoring system operable on command having a variable frequency oscillator generating an audio frequency signal proportional to the number of said seismic movements.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1976},

  month        = {1}

}

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