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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers

ISO Journal TitleJ Korean Inst. IIIum. Electr. Install. Eng.
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  3. JIEIE 2015-04(Vol.29 No.04)
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Title Improving Sensitivity of the Pyroelectric Infrared Flame Detector
Authors Hyun Seon Song ; Yeu Yong Lee
DOI http://dx.doi.org/10.5207/JIEIE.2015.29.4.077
Page pp.77-84
ISSN 1225-1135
Keywords PZT Ceramics ; Pyroelectric Infrared ; Detector ; Detecting Programming ; Amplifying Circuit of PIR Signal ; Microprocessor Control Circuit
Abstract PZT ceramics, usually used pyroelectric materials exhibited a relatively highly Curie temperture(Tc) of 250-450℃ and permittivity constant of 500-1600. In this paper, the pyroelectric infrared detectors are applied two different types of pyroelectric materials, that is tetragonal crystal of ferroelectric PbTiO3 and rhombohedral crystal of Pb(Zr,Ti)O3. PZT ceramics shows not only highly Curie temperture but also excellent pyro and piezoelectric properties at the Zr/Ti(=52/48) ratio. Therefor in this paper, the pyroelectric infrared detectors are applied PZT ceramics, and obtained sensitive sensing characteristics by expriment case studies.