Detail A newly designed chopper for pyroelectric infrared sensor by using a dome-shaped piezoelectric linear motor (DSPLM) (in Journal of Electroceramics Volume 23, Numbers 2-4) Bibliografi Author: Man-Soon, Yoon ; Sung-Moo, Heo ; Soon-Chul, Ur Topik: Dome Shaped; Piezoelectric; Pyroelectric; Infrared; Sensor Bahasa: (EN )    Edisi: October 2009     Penerbit: Springer     Tempat Terbit: The Netherlands    Tahun Terbit: 2009     Jenis: Article - diterbitkan di jurnal ilmiah internasional Fulltext: A newly designed chopper for pyroelectric.pdf (2.88MB; 0 download) [Informasi yang berkaitan dengan koleksi ini di internet] Abstract In an attempt to develop a compact and simple structured chopper for a PIR (Pyroelectric Infrared Ray) sensor, a smart ultrasonic linear motor was introduced for a new solid state chopper. The actuating component contains a dome-shaped monolithic piezoelectric ceramic fabricated using PIM. Dome-shaped piezoelectric actuator (DSPA) parts having two different diameters, 5 mm and 8 mm, each with the same curvature radius of 10 mm, were fabricated using powder injection molding (PIM). Dynamic characteristics of the linear motors were evaluated. As a result, it was found that the maximum tip displacements in the F 8 and F 5 samples were 700 and 300 nm, respectively. To measure the output characteristics as a function of chopping period, the changes of output signals at various chopping periods (1 to 3 s) were observed by applying stationary infrared rays. The observed pulse signal voltages were a value of 1.7 to 2.2 V. As the intermitting period increased, output signals decreased as much as 0.5 V. When the DSPLM chopper is operated at room temperature after removing the IR source, the average noise output voltage was 0.3V, resulting in a one-sixth lower value compared with the output voltage when the infrared rays were incident. These results indicated that the signal-to-noise ratio has available values within 5.4 to 7.2. Moreover, it was shown that the power consumption was less than 1 watt when the DSPLM was in operation. Therefore, a module of the continuously detectable PIR sensor that was compact in size with reduced power consumption and high reliability was successfully realized using the DSPLM chopper. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Lihat Sejarah Pengadaan  Konversi Metadata   Kembali

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