Reliability of detection of sources of infrared radiation in security alarm and distress signal systems
نویسندگان
چکیده
The problem of detecting sources of infrared radiation affects a large proportion of security alarm and distress signal systems. In a time of increasing property crime, it is highly important for passive infrared detectors (PIR) to be able to detect motion within the guarded area reliably and free of error. In the case of installation of passive infrared detectors (PIR) it is naturally important not only to ensure correct installation, to gauge the external influences impacting upon the detector and ensure proper maintenance, but also to guarantee their capability of detection under more arduous conditions. The tests which have been conducted examine both the normal operation of the PIR detectors and the operation of these detectors under extreme conditions (temperature, soiling, screens etc.). These tests are important both from an informative perspective and due to the possibilities of development of potential counter-measures which could lead to their improvement and an enhancement of their level of security.
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