Sensors: Self-Contained Intelligent Sensors for Structural Monitoring

这项工作的基本目标是研究一种有源传感系统，包括损伤检测固件、遥测和能量采集能力，以产生独立的有源无线传感器技术。此外，还建议对该样本设备进行推广，以产生一种分析程序来定义此类传感系统的必要物理属性(例如，传感器类型、数量、灵敏度、带宽、功率)，以解决一般结构健康监测和损伤预测(SHM/DP)问题。本研究的任务是：(1)根据频率含量、幅值、换能器几何形状、配置和位置等测量方法，确定环境振动能量采集的物理极限和参数。(2)根据温度梯度、最低温度和最高温度等措施，确定环境温度的物理极限和集电参数。(3)确定与特定的SHM/DP算法相关的、控制用于传输信息、用于计算和用于激励具有已知输入的结构的能量限制的关键参数。(4)确定模数转换、算法要求等计算功耗的关键参数。(5)实验演示了所提出的自给式传感系统。这是传感器计划NSF 04-522资助的项目。

Abstract0426777Dan InmanVirginia TechThe basic objective of this effort is to research an active sensing system, including damage detection firmware, telemetry and a power harvesting ability to produce a stand alone, active wireless sensor technology. In addition it is proposed to generalize this sample device to produce an analytical procedure to define the requisite physical properties of such a sensing system (e.g. sensor type, number, sensitivity, bandwidth, power) for general structural health monitoring and damage prognosis (SHM/DP) problems. The tasks in performing this research are: (1) Determine the physical limits and parameters for power harvesting of ambient vibration energy in terms of measures such as frequency content, amplitude, transducer geometry, configuration and placement. (2) Determine the physical limits and parameters for power harvesting of ambient temperature in terms of measures such as gradient, minimum and maximum temperature. (3) Determine the key parameters governing the energy limits for transmitting information, for computing, and for exciting the structure with a known input as related to a specific SHM/DP algorithm. (4) Determine the key parameters for power consumption for computing such as analog digital conversions and algorithm requirements. (5) Experimentally demonstrate the proposed self-contained sensing system.This is a project supported under the Sensors Initiative NSF 04-522.