圧電効果を利用した振動型センサの設計

抄録

The purpose of this research is to propose a piezoelectric vibration type sensor that approaches the dynamic range of humans. The proposed sensor uses a 58 mm long cantilever as a substrate and mounts a piezoelectric vibrator near the support point of the cantilever to create the sensor. This sensor uses one vibrator to generate vibrations and the other vibrator to output a voltage, changing its natural frequency to measure mass. In the experiment, a weight was placed 8 mm from the tip of the cantilever and the change in vibration amplitude was measured. After that, the same procedure was performed at a location 28 mm from the tip. As a result, there was no difference in the change in vibration amplitude depending on where the weight was placed, but the change in vibration amplitude was confirmed. In the future, we will improve the proposed sensor with the aim of expanding the dynamic range.