EVALUATION OF FENCE INTRUSION DETECTION SYSTEMS (FROM CARNAHAN CONFERENCE ON CRIME COUNTERMEASURES, 1975 PROCEEDINGS BY JOHN S JACKSON - SEE NCJ-31252)

• NCJ Number: 31268
• Author(s): R C UNDERDOWN; G J ZDYB; T P KABASERVICE
• Date Published: 1975
• Length: 4 pages
• Corporate Author: University of Kentucky; Institute of Electrical and Electronics Engineers; Aerospace and Electronic Systems Society
• Publication Format: Document
• Language: English
• Country: United States of America

Annotation

THREE COMMERCIAL SENSOR SYSTEMS - CABLE-TYPE SENSORS WITH WIND ALARM REJECTION LOGIC, SWITCH-TYPE SENSORS WITHOUT LOGIC, AND SWITCH-TYPE SENSORS WITH LOGIC - WERE TESTED USING A VARIETY OF CLIMBING AND PENETRATION METHODS.

Abstract

FALSE AND NUISANCE ALARM PERFORMANCE OF THE SENSORS WAS ALSO MONITORED. NO SINGLE SYSTEM WAS SHOWN TO BE SUPERIOR IN ALL ASPECTS OF PERFORMANCE. OBTAINING A GOOD BALANCE BETWEEN SENSITIVITY AND THE RATE OF WIND-INDUCED NUISANCE ALARMS WAS NOTED AS THE PRINCIPAL PROBLEM IN THE CONTINUING DEVELOPMENT OF FENCE SENSOR SYSTEMS. THE TESTS PERFORMED INDICATED THE ADVANTAGE OF USING PROCESSING LOGIC FOR BOTH CABLE-TYPE AND SWITCH-TYPE SENSORS. THIS LOGIC HAD THE EFFECT OF INCREASING THE WIND SPEED THAT COULD BE TOLERATED WITHOUT EXCESSIVE NUISANCE ALARMS.