如何在结构监测系统中使用基于MEMS的压电传感器来弥合功率间隙

　　如何在结构监测系统中使用基于MEMS的压电传感器来弥合功率间隙

　　在建筑物、桥梁和飞机上未被发现的结构弱点可能是灾难性的。这些复杂的结构在设计和建筑材料上有很大的不同，并且在不同的疲劳点上承受多个应力。无论是古代纪念碑参观，100 +岁的桥梁承受交通荷载从未设想的结构，或大胆的现代的高楼大厦和“海上桥梁，基础设施监控已经成为常态。传感器和无线技术的进步突出了结构健康监测作为无线传感器网络的增长市场。

　　However，theadvantages of significant尽管无电缆、超低功耗操作，包括敌意环境限制，极and Battery终身可靠实用的障碍，have to be in some扇区。

　　Figure 1： Old bridges like this one over Hurricane Gulch， Alaska，ornew， such as the Great Belt Bridge， Denmark， require constant monitoring to ensure structural integrity. Vibration energy harvesting provides an ideal means of powering remotely-located wireless sensors.

　　New research developments in MEMS-basedpiezoelectric energy-harvesting technology are addressing these challenges to provide extremely-robust， high-reliability， battery-free power for sensors in structural monitoring applications. This article will review recent developments， from the UK and the US， to illustrate the potential for energy harvesting in this market.

　　Such devices， as they become commercially available， will require associated electronic circuitry， which must be both ultra-low-power itself and provide power management at low levels with power conversion， rectification， and voltage boosting.

　　Emerging technology， such as sensors， fiber optics， computer vision， wireless sensor networks， and energy harvesting are providing innovative solutions to ongoing applications. MEMS technology for vibration and piezoelectric-based， self-powered sensors， with application in structural health monitoring， is thesubject of advanced research around the world.