JRM Vol.21 No.2 pp. 260-266
doi: 10.20965/jrm.2009.p0260


Compact Force Sensor Using AT-Cut Quartz Crystal Resonator Supported by Novel Retention Mechanism

Keisuke Narumi*, Ayumi Asakura*, Toshio Fukuda**, and Fumihito Arai*

*Department of Bioengineering and Robotics, Tohoku University
6-6-01 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan

**Department of Micro-Nano Systems Engineering, Nagoya University
Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

November 15, 2008
January 29, 2009
April 20, 2009
sensor, force measurement, quartz crystal, structural design, microfabrication

The compact force sensor we developed uses an AT-cut quartz crystal resonator whose resonance frequency changes under external force, and features high sensitivity, high-speed response, a wide measurement range, and superior temperature and frequency stability. Quartz crystal resonators were rarely used in force measurement due to their poor stress concentration during bending. The objective of this study was to construct a sensor mechanism that safely maintains the quartz crystal resonator under external force. We designed and analyzed the novel retention mechanism of the quartz crystal resonator. The proposed structure is flat, small, and sensitive. Moreover, we designed and produced a compact case for mounting the retention mechanism. Sensor output is expected to be changed by thermal expansion, so we evaluated the temperature characteristics of the assembled sensor, finding the relationship of the temperature and sensor output to be linear and temperature easily compensated for.

Cite this article as:
Keisuke Narumi, Ayumi Asakura, Toshio Fukuda, and Fumihito Arai, “Compact Force Sensor Using AT-Cut Quartz Crystal Resonator Supported by Novel Retention Mechanism,” J. Robot. Mechatron., Vol.21, No.2, pp. 260-266, 2009.
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