doi: 10.17586/2226-1494-2017-17-1-143-150


I. V. Bilizhenko, V. V. Volkhonskiy

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For citation: Bilizhenko I.V., Volkhonskiy V.V. Approach to synthesis of passive infrared detectors based on quasi-point model of qualified intruder. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2017, vol. 17, no. 1, pp. 143–150. doi: 10.17586/2226-1494-2017-17-1-143-150


Subject of Research. The paper deals with synthesis of passive infra red (PIR) detectors with enhanced detection capability of qualified intruder who uses different types of detection countermeasures: the choice of specific movement direction and disguise in infrared band. Methods. We propose an approach based on quasi-point model of qualified intruder. It includes: separation of model  priority parameters, formation of partial detection patterns adapted to those parameters and multi channel signal processing. Main Results. Quasi-pointmodel of qualified intruder consisting of different fragments was suggested.  Power density difference was used for model parameters estimation. Criteria were formulated for detection pattern parameters choice on the basis of model parameters. Pyroelectric sensor with nine sensitive elements was applied for increasing the signal information content. Multi-channel processing with multiple partial detection patterns was proposed  optimized  for detection of intruder's specific movement direction. Practical Relevance. Developed functional device diagram can be realized both by hardware and software and is applicable as one of detection channels for dual technology passive infrared  and microwave detectors.

Keywords: PIR detector, standard walk test target, simulated walk test target, intruder, detection

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