Study on multi-point sensing for building structures utilizing the relative story displacement sensors

实时监测层间相对位移，可以识别受损构件。首先，我们开发了由LED阵列、固定焦距透镜和位置敏感探测器（PSD）组成的横向位移传感器。接下来，我们讨论了在实际建筑中实施LDS的可行性。最后，我们开发并评估了一种新型的五自由度（5-DOF）传感器系统，该系统可以同时测量相对层位移，局部倾斜角和扭力角，使用三对LED阵列和PSD单元。

Monitoring the relative story displacement in real time makes it possible to identify the damaged elements. First, we developed lateral displacement sensor composed of a LED array, a lens with a fixed focal length, and a position sensitive detector (PSD). Next, we discussed the feasibility of the LDS implemented in an actual building. Finally, we developed and evaluated a novel five-degree-of-freedom (5-DOF) sensor system which can simultaneously measure the relative-story displacement, the local inclination angle, and the torsion angle was developed using three pairs of LED arrays and PSD units.