公开(公告)号：US06600149B2

公开(公告)日：2003-07-29

申请号：US09746037

申请日：2000-12-22

申请人： Whitten L. Schulz ,  Eric Udd

发明人： Whitten L. Schulz ,  Eric Udd

IPC分类号： G01J142

CPC分类号： G01N21/774 ,  G01M3/165 ,  G01M3/38 ,  G01N2021/7723 ,  G02B6/022

摘要： Fiber grating environmental measurement systems are comprised of sensors that are configured to respond to changes in moisture or chemical content of the surrounding medium through the action of coatings and plates inducing strain that is measured. These sensors can also be used to monitor the interior of bonds for degradation due to aging, cracking, or chemical attack. Means to multiplex these sensors at high speed and with high sensitivity can be accomplished by using spectral filters placed to correspond to each fiber grating environmental sensor. By forming networks of spectral elements and using wavelength division multiplexing arrays of fiber grating sensors may be processed in a single fiber line allowing distributed high sensitivity, high bandwidth fiber optic grating environmental sensor systems to be realized.

摘要翻译： 光纤光栅环境测量系统由传感器组成，传感器被配置为通过涂层和板的作用来响应周围介质的湿度或化学成分的变化，诱导测量的应变。 这些传感器也可用于监测由于老化，开裂或化学侵蚀而导致的结合物内部的退化。 可以通过使用放置为对应于每个光纤光栅环境传感器的光谱滤波器来实现以高速和高灵敏度复用这些传感器的手段。 通过形成光谱元件的网络并使用光纤光栅传感器的波分复用阵列可以在单个光纤线路中进行处理，从而实现分布式高灵敏度，高带宽光纤光栅环境传感器系统。

公开(公告)号：US07038190B2

公开(公告)日：2006-05-02

申请号：US10325874

申请日：2002-12-20

申请人： Eric Udd ,  Sean G. Calvert ,  Whitten L. Schulz ,  W. Marley Kunzler ,  M. Wesley Kunzler

发明人： Eric Udd ,  Sean G. Calvert ,  Whitten L. Schulz ,  W. Marley Kunzler ,  M. Wesley Kunzler

IPC分类号： G01J1/04

CPC分类号： G01L1/246 ,  G01D5/35383

摘要： A fiber grating environmental sensing system is described that has the ability to measure strain, vibration, humidity and water content. Fiber gratings are used to measure axial strain to accomplish these goals. An approach is described that uses matched fiber grating sensors and filters to allow for thermal compensation greatly reducing one of the key performance issues facing these systems. The system may be deployed in such applications as roadways and paved surfaces, bridges, buildings and aircraft and spacecraft. Means are described to implement transducers optimized for specific environmental measurements as well as means to demodulate the fiber grating sensors.