Accession Number:

AD0770537

Title:

Passive Portal Detector.

Descriptive Note:

Final technical rept.,

Corporate Author:

HONEYWELL INC HOPKINS MINN GOVERNMENT AND AERONAUTICAL PRODUCTS DIV

Personal Author(s):

Report Date:

1973-11-01

Pagination or Media Count:

61.0

Abstract:

Honeywell designed a Passive Portal Detector and built two systems, including two frames for outdoor sensor mounting. The Passive Portal Detector is used to sense the passage of a metallic magnetic weapon through a sensor-equipped portal. It signifies detection by illumination of an indicator lamp and by a relay closure, used for an audible or remote alarm. The output indicator has a minimum energized time of approximately one-half second. Sensor panels, providing magnetic sensor coils with vertical and horizontal polarization, are mounted on each side of a portal. Disturbances in the earths magnetic field caused by a magnetic object passing through the portal cause induced voltages in the sensor coils. The signals are amplified by solid-state electronics to a level which can be compared with a reference voltage. When the threshold level is exceeded, alarm circuitry is activated. Author

Subject Categories:

  • Magnetic and Electric Field Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE