圧電素子を用いた押圧力測定センサの出力特性

概要

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In using piezo-electric ceramics for dynamometers or pressure sensors, the output electric voltage must be correctly converted into the external force. Especially, in the case of small loading rate of external force, it should be taken into account that several variables might induce errors into the resulted output such as the kind of imposed material, loading or unloading, the amount of external force and the loading (unloading) rate. In this paper, changing the variables mentioned above, the maximum output voltage is measured and the wave form of output voltage is also recorded. Some remarkable results are obtained. For instance, in loading at small loading rate against soft materials, the output wave form becomes extremely flat and the maximum voltage remains constant independently of the amount of external force. An effective method of the conversion is proposed even for such flat form of output voltage by using the integrated voltage instead of the maximum voltage.
山梨大学の論文