Tactile sensor using piezoelectric resonator

Author

Maezawa, Miyuki ; Imahashi, Takuya ; Kuroda, Yoshimi ; Adachi, Hideo ; Yanagisawa, Kazuhisa

Author_Institution

Advanced Technol. Res. Center, Olympus Opt. Co. Ltd., Tokyo, Japan

Volume

1

fYear

1997

fDate

16-19 Jun 1997

Firstpage

117

Abstract

A new type of tactile sensor probe head which detects compliance of live tissue has been developed. The sensor consists of a Colpitts circuit including a 1.5 mm×1.5 mm piezoelectric resonator on a mount 2.4 mm in diameter. This size is small enough to be inserted into the human body. Experimental results show that the oscillating frequency change versus the contact force is related to the object compliance. Especially, the maximum gradient of the oscillating frequency versus contact force curve is able to identify the difference of the compliance. It is possible to measure accurate compliance without setting the contact force constant

Keywords

biomechanics; biomedical equipment; crystal oscillators; crystal resonators; force measurement; lead compounds; microsensors; piezoceramics; tactile sensors; 1.5 mm; 2.4 mm; Colpitts circuit; PZT; PbZrO3TiO3; contact force; human body insertion; live tissue compliance detection; oscillating frequency change; oscillating frequency gradient; piezoelectric resonator; tactile sensor probe head; thickness mode PZT piezoelectric resonator; Elasticity; Electrodes; Equivalent circuits; Force measurement; Force sensors; Frequency; Optical resonators; Probes; Tactile sensors; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid State Sensors and Actuators, 1997. TRANSDUCERS '97 Chicago., 1997 International Conference on

Conference_Location

Chicago, IL

Print_ISBN

0-7803-3829-4

Type

conf

DOI

10.1109/SENSOR.1997.613596

Filename

613596