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JRM Vol.22 No.3 pp. 286-292
doi: 10.20965/jrm.2010.p0286
(2010)

Paper:

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Design and Characterization of Load Sensor with AT-Cut QCR for Miniaturization and Resolution Improvement

Keisuke Narumi*, 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

Received:
October 30, 2009
Accepted:
February 12, 2010
Published:
June 20, 2010
Creative Commons License
Keywords:
sensor, load measurement, quartz crystal, micro-mechanism, structural design
Abstract
The compact load sensor we developed uses an AT-cut quartz crystal resonator whose resonance frequency changes under external load, featuring high sensitivity, high-speed response, and a wide measurement range – plus superior temperature and frequency stability. The vulnerability of previous quartz crystal resonators to stress concentration in bending prevented them from being more widely applied to load measurement. The sensor we developed maintains the quartz crystal resonator safely. Our objective here is to improve load measurement resolution and to miniaturize the sensor, which we did designing novel retention of the quartz crystal resonator fixed vertical to applied load. The new load sensor’s resolution is 3.21 mN –seven times better than conventional load sensors.
Cite this article as:
K. Narumi, T. Fukuda, and F. Arai, “Design and Characterization of Load Sensor with AT-Cut QCR for Miniaturization and Resolution Improvement,” J. Robot. Mechatron., Vol.22 No.3, pp. 286-292, 2010.
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