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Displacement sensor including a voltage converting unit that contains a resistor connected to a piezoelectric element
Displacement sensor including a voltage converting unit that contains a resistor connected to a piezoelectric element
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机译:位移传感器包括电压转换单元,该电压转换单元包含连接到压电元件的电阻器
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摘要
There is provided a displacement sensor which can precisely detect the amount of displacement given by an operator. A touch sensor which is a type of the displacement sensor has a piezoelectric element, a voltage converting unit and a detecting unit. The piezoelectric element instantaneously generates a voltage proportional to a pressing force (the amount of pressing). The voltage converting unit converts the voltage generated by the piezoelectric element, into a voltage proportional to a transition determined based on a predetermined time constant determined by an impedance of a resistor of the voltage converting unit and capacitances of a capacitor and the piezoelectric element, and a pressing force. The detecting unit integrates output voltages of the voltage converting unit, and calculates the pressing force (the amount of pressing) based on an integration value.
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