Home > Technology > Analyze the cause of false positives on burglar alarm
Analyze the cause of false positives on burglar alarm
2011-03-03 08:24:01
Current alarm system causes false positives, false negatives mainly has following several aspects. Anti-jamming ability for co-channel interference of wireless detector will easily lead to false positives, false negatives. Infrared detectors for intrusion caused false positive false negative judgement is not accurate enough. Infrared detectors vulnerable to environmental factors such as temperature, light and produce false positives. Wireless probe power shortage of power supply, low power without effective information delivery makes the detector probe not work arising from short or omitting a false. As host and probes are using wireless encoding settings pass code has caused repeated host and detector weight codes cause false positives.

What are we to analyze infrared detection alarm main reason will result in false positives, false negatives. Current alarm system causes false positives, false negatives mainly has following several aspects. Wireless probe anti-jamming capability too embarrassed to co-channel interference performance easily lead to false positives, false negatives. Infrared detectors on false positives, false negatives caused by intrusion of common sense is not accurate enough. Infrared detectors vulnerable to environmental factors such as temperature, light and produce false positives. Wireless probe power shortage of power supply, low power without effective information delivery makes the detector detection distances shorter or does not work and generate false positives, false negatives. As host and probes are based on wireless encoding duplicate encoding settings result in a host and probe coincident code false positives. Also some alarm of quality too shame as components of damage and production technology bad caused errors reported, also has with select of device, and installed of way, and angle, and location, and also about, such as selection of detector is vibration detector installed in source comparison large and more of local (as airport, and railway next,) because aircraft, and train run Shi source most will produced errors reported, as bat often appears of local selection ultrasonic detector on easy caused errors reported, in by environment of effect Xia as air flow, and pet action,, also has human of factors main has user operation improper, and does not carefully triggered alarm, and errors into, and errors into has fortification of visit area, will produced errors reported. Causes a lot of false positives, false negatives are very complex. So to reduce the burglar alarm of false positives, false negatives are from a wide range of the most important factors to be considered, such as selecting probes from the technology and performance, including selection, Fresnel lens shape design of probe, microprocessor programs, technology, skip codes automatically scroll bar coding technology, production processes, use the method, temperature compensation, sensitivity detection range adjustment. This combination of factors determines the detector performance and rate of false positives.

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