Ultrasonic fingerprint sensor in underglass prototype using impedance mismatching
- Title
- Ultrasonic fingerprint sensor in underglass prototype using impedance mismatching
- Author
- 박관규
- Keywords
- Ultrasound imaging; Fingerprint imaging; Biometric identification; Focused transducer
- Issue Date
- 2020-02
- Publisher
- KOREAN SOC MECHANICAL ENGINEERS
- Citation
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v. 34, no. 2, page. 531-539
- Abstract
- Fingerprint imaging is a powerful tool in biometric identification systems. There are several methods for measuring fingerprints, such as optics, capacitive, and ultrasonic methods. The previous ultrasonic imaging techniques have been available in immersion systems which require the hands to be put into water. Also, pulse-echo system in dry condition has coupling layer which is similar acoustic impedance to human tissue or high impedance materials based on waveguide. For fingerprint imaging in the dry state, we propose an ultrasonic imaging technique in underglass by using the impedance mismatch between the fingertip and the solid plate. We present the image results according to the plate material such as acrylic, glass and PDMS. In addition, simulation results based on small 2-D array transducers in a near field suggest the feasibility of compact and fast fingerprint scanning system. Therefore, this work presents feasibility of ultrasonic pulse-echo fingerprint sensing method for dry hand.
- URI
- https://link.springer.com/article/10.1007/s12206-019-1122-3https://repository.hanyang.ac.kr/handle/20.500.11754/161492
- ISSN
- 1738-494X; 1976-3824
- DOI
- 10.1007/s12206-019-1122-3
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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