• 제목/요약/키워드: Amplifying Circuit of PIR Signal

검색결과 1건 처리시간 0.013초

초전형 적외선식 불꽃감지기의 감도특성 개선 (Improving Sensitivity of the Pyroelectric Infrared Flame Detector)

  • 송현선;이의용
    • 조명전기설비학회논문지
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    • 제29권4호
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    • pp.77-84
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    • 2015
  • PZT ceramics, usually used pyroelectric materials exhibited a relatively highly Curie temperture(Tc) of $250-450^{\circ}C$ 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 $PbTiO_3$ and rhombohedral crystal of $Pb(Zr,Ti)O_3$. 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.