کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
749149 | 894810 | 2011 | 9 صفحه PDF | دانلود رایگان |
Fingerprint imaging using ultrasound has been investigated for several years and has shown to be a valid alternative to optical scanners. Capacitive micro-machined ultrasound transducers (cMUT) is an emerging MEMS technology that can be profitably exploited in biometric applications, like fingerprint or palm print.In this work a FEM model of a cMUT is proposed and used to design a 192-element array with a frequency band centered at 12.5 MHz. A cMUT array was manufactured by means of a proprietary fabrication process and an ultrasound probe was assembled and experimentally characterized. Comparison between simulation and experimental results has shown a quite good agreement. The cMUT probe was operated at a frequency of 12 MHz and used to produce images of fingerprints, the quality of which was quite satisfactory.
Journal: Sensors and Actuators A: Physical - Volume 172, Issue 2, December 2011, Pages 561–569