MELVIN LEONARD PRICE
Pilots at Toney Dr, Huntsville, AL
License number
Alabama A1528315
Issued Date
Aug 2015
Expiration Date
Aug 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
917 Toney Dr SE, Huntsville, AL 35802
Professional information
Intrusion Detection System
US Patent:
5049858, Sep 17, 1991
Filed:
Apr 23, 1990
Appl. No.:
7/512476
Inventors:
Melvin L. Price - Huntsville AL
Assignee:
Physitron, Inc. - Huntsville AL
International Classification:
G08B 1318
US Classification:
340552
Abstract:
A pulsed conductivity sensor intrusion detection device which uses the conduction of short electrical pulses on or near the surface and the immediately adjoining air above the surface. An intruder causes the propagated signal to change which is sensed by the Pulsed Conductivity Sensor (PCS) and produces an alarm. A path is protected by placing a transmitter and a receiver on either side with the protected region between them. An area is protected by placing transmitter and receivers around the periphery of the area. Pulses are sent from the transmitter to the receiver through the surface and the air immediately above it. The receiver sends the signal to an analyzer where the frequency/amplitude spectrum is determined using Fourier Transform techniques. Pulses are sent ten or more times per second and each is analyzed. By comparing sequential pulses, any change will be detected.