Method of popcorn-noise reduction

• Autorzy: Bielecki Z. , Brudnowski M.
• Języki publikacji: EN

Abstrakty

EN

A new type of passive infrared human body detecting photoreceiver with popcorn noise reduction systems is presented. When the range of operating temperatures and temperature gradients of a pyroelectric detector are spread, the popcorn noise occurs. To avoid error signal at the system output we designed two-signal processing circuits. We observed a difference of frequency components at the photoreceiver output. The output current resulting from popcorn noise holds high frequency components compared with frequency components of a moving person. So, we can distinguish popcorn noise analysing frequency components of the output current from the pyroelectric detector.

Słowa kluczowe

EN

pyroelectric detectors; low-noise preamplifier; thermal imaging systems

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2003
• Tom: Vol. 11, No. 1
• Strony: 45--50
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Bielecki Z.

• Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland

autor

Brudnowski M.

• VIGO System S.A., 3 Świetlików Str., 01-389 Warsaw, Poland

Bibliografia

• 1. A. Rogalski and J. Piotrowski, "Intrinsic infrared photodetectors", Prog. Quant. Electr. 12, 87-289 (1988).
• 2. A. Rogalski, Infrared Detectors, Gordon and Breach Science Publishers, Amsterdam, 2000.
• 3. E.H. Putley, "Thermal detectors", in Optical and Infrared Detectors, edited by R.J. Keyes, Springer, Berlin, 1977.
• 4. R.W. Whatmore, "Pyroelectric ceramics and devices for thermal IR detection and imaging", Ferroelectrics 118, 241-259 (1991).
• 5. M. Lee. S. Bae, and A. Bhalla, "Thermal properties of a pyroelectric-ceramic infrared detector with metallic intermediate layer", Opt. Eng. 37, 1746-1753 (1998).
• 6. S.G. Porter, "A brief guide to pyroelectric detectors", Ferroelectrics 33, 193-206 (1981).
• 7. B.B. Lavrencic, J. Polanec, P. Cevc, and A. Kanduser, "Technology of double parallel pyroelectric detector", Ferroelectrics 91, 323-328 (1988).
• 8. E.H. Putley, "A method for evaluating the performance of pyroelectric detector", Infrared Phys. 20, 139-147 (1980).
• 9. R.W. Whatmore, "Pyroelectric devices and materials", Rep. Prog. Phys. 49, 1335-1386 (1986).
• 10. J. Fraden, Handbook of Modem Sensors, American Institute of Physics Press, Woodbury, NY 1997.
• 11. Z. Bielecki, "Elimination of popcorn noise in receivers with pyroelectric detectors", Proc. IRS2 Int. Conf Infrared Sensors & Systems, Erfurt, 173-177 (2002).
• 12. C.D. Motchenbacher and J.A. Connelly, Low-noise Electronic System Design, Wiley, New York, 1995.
• 13. J.L. Vampola. "Readout electronic for infrared sensors", in: The Infrared and Electro-optical Systems Handbook, Vol. 3, edited by W.D. Rogatto SPIE Press, Bellington, 1993.
• 14. H. Matsuda, Y. Takada, Y. Murayamo, R. Taniguchi, and M. Ikari, "Miniature PIR human body detecting sensor", Proc. IRS2 Int. Conf Infrared Sensors & Systems, Erfurt, 49-54 (2001).
• 15. M.A. Rouse," Pyroelectric infrared detectors", Electron Components Appl. 4, 142 (1982).
• 16. Z. Bielecki, "Photoreceiver with popcorn-noise reduction systems", Proc. 26 th Int. Conf on Infrared and Millimeter Waves, 10-14 September, Toulouse, France, 72-73 (2001).