The Structural Health Monitoring for Protection on the Break of the Load Bridge with Developed Piezo Sensor.

压电元件通过来自外部的力的工作产生个人大的输出电压。为此，我们利用压电元件研制了位移计，并进行了性能评价，将研制的试制压电位移传感器安装在桥梁模型中，对其进行了振动，进行了实验。结果表明，桥梁模型安装部位的位移精度在实际工程中能够满足要求。由于使用了压电元件，即使在断电时显影传感器上的电源消失，也可以实现足够的功能。因此，当电力供应停止时，如地震发生时，它可以有效地利用。

The piezo element produces personally large output voltage by the work of the force from the outside. So we developed the displacement gage using the piezo element, and the performance evaluation was carried out.In installing developed trial manufacture piezo displacement sensor in the bridge model, we shook it, the experiment was carried out. As the result, displacement accuracy of the mounting division of the bridge model was obtained at the accuracy which could be satisfied enough practically. It is possible to fulfill the sufficient function, even if power supply disappears on this development sensor in the power cut, since the piezo element is used. Therefore, it can be effectively utilized, when the power supply stopped, as the earthquake occurred.