Overload Protection Mechanisms for Force Detecting Beam in a Force Sensor
Koyu Abe and Masaru Uchiyama
Department of Aerospace Engineering, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-01, Sendai 980-8579, Japan
Overload prevention is important in force sensors to avoid fatal damage due to unexpected external impact. Until now, some mechanisms using screws or straight pins have been proposed for preventing damage to the sensor. However, nothing has been reported regarding the utility of this mechanism. The unidirectional force sensor based on an H-slit type parallel beam we proposed in previous work. This sensor structure alone can be realized for overload prevention without any other parts and can be embedded as overload protection mechanism in the structure. In this paper, we verify the utility of conventional type’s mechanisms and evaluate the usefulness of the slit type one which we have developed.
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