BURGLARY ALARM SYSTEM - PERFORMANCE AND RELIABILITY EVALUATION OF A PASSIVE INFRARED INTRUDER SENSOR EQUIPMENT SYSTEMS IMPROVEMENT PROGRAM

• NCJ Number: 35141
• Author(s): J J REDMANN
• Date Published: 1976
• Length: 30 pages
• Contract Number(s): J-LEAA-025-73
• Sponsoring Agency: US Dept of Justice; US Dept of Justice NIJ Pub
• Corporate Author: Aerospace Corporation
• Publication Format: Document
• Language: English
• Country: United States of America

Annotation

REPORT ON THE EVALUATION OF THE ROSSIN PASSIVE INFRARED INTRUDER SENSOR, WHICH DETECTS THE PRESENCE OF A MOVING OBJECT WITHIN ITS OPTICAL FIELD OF VIEW, AND ACTUATES A RELAY WHICH MAY BE USED TO SOUND AN ALARM.

Abstract

THIS SENSOR WAS SUBJECTED TO A NUMBER OF TESTS, INCLUDING FUNCTIONAL PERFORMANCE, EXPOSURE TO ELECTROMAGNETIC INTERFERENCE, SONIC EXPOSURE, EXPOSURE TO HIGH AND LOW TEMPERATURES, EXPOSURE TO MEDIUM AND LOW ALTITUDES, AND EXPOSURE TO SUNLIT ENVIRONMENT WITH MOVING SHADOWS. THE ONLY FLAWS NOTED IN ITS PERFORMANCE WERE MISSED ALARMS WHEN THE INTRUDER RAN TOO RAPIDLY THROUGH THE FIELD OF VIEW, AND FALSE ALARMS CAUSED BY MOVING SHADOWS ON SUNLIT SURFACES WITHIN THE FIELD OF VIEW. A MODIFIED DESIGN RECENTLY DEMONSTRATED BY THE MANUFACTURE IS SAID TO GIVE IMPROVED PERFORMANCE, ESPECIALLY WITH RESPECT TO FAST-MOVING OBJECTS, BUT THE TESTS REPORTED HEREIN HAD BEEN COMPLETED BEFORE SUCH UNITS WERE AVAILABLE. (AUTHOR ABSTRACT MODIFIED)