NDLI: A newly designed chopper for pyroelectric infrared sensor by using a dome-shaped piezoelectric linear motor (DSPLM)

Content Provider	Springer Nature Link
Author	Man Soon, Yoon Sung Moo, Heo Soon Chul, Ur
Copyright Year	2008
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 Φ 8 and Φ 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.
Starting Page	242
Ending Page	247
Page Count	6
File Format	PDF
ISSN	13853449
Journal	Journal of Electroceramics
Volume Number	23
Issue Number	2-4
e-ISSN	15738663
Language	English
Publisher	Springer US
Publisher Date	2008-03-12
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dome-shaped Piezoelectric Pyroelectric Infrared Sensor Crystallography Electrochemistry Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Methods Optical and Electronic Materials
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry Mechanics of Materials Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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