Low-frequency response of pyroelectric sensors

Author

Kang, Seong Jun ; Samoilov, Vladimir B. ; Yoon, Yung Sup

Author_Institution

Sch. of Electr. & Comput. Eng., Inha Univ., Inchon, South Korea

Volume

45

Issue

5

fYear

1998

Firstpage

1255

Lastpage

1260

Abstract

Sensitivity of pyroelectric IR-detectors of slow thermal processes, especially of human body sensors, depends strongly on their response in the infra-low (/spl sim/0.1 to 1 Hz) region of frequency spectrum. The main mechanisms of heat losses-heat conduction of environment, lateral heat conduction in the plane of sensitive element, and emission of radiation-are considered. Their influence on the low-frequency response of pyroelectric sensors is estimated. Exact solutions and simple expressions for quantitative description of main specific features of real systems are obtained. Criteria of validity of the adequate models are determined.

Keywords

heat conduction; heat losses; heat radiation; infrared detectors; pyroelectric detectors; sensitivity; 0.1 to 1 Hz; IR-detectors; emission of radiation; frequency spectrum; heat losses; human body sensors; infra-low region; lateral heat conduction; low-frequency response; pyroelectric sensors; sensitive element; thermal processes; Biological system modeling; Dielectric substrates; Electrodes; Frequency estimation; Humans; Infrared detectors; Motion detection; Pyroelectricity; Surface resistance; Thermal sensors;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.726451

Filename

726451