結構物之變形量測在健康診斷中是非常重要的工作，在結構物快速診斷的需求下，遠距非接觸式之動態光學量測方法，便具備其便利性及需求性，但其具有一定之困難度。本研究發展出一新式之非接觸式結構物位移量測儀器，其基本原理是利用結構物變形前後感測元件所激發之訊號中將其變形前後之時間間距變化轉換成位移的差異，而其中原理只是求解其三角幾何關係即可建立出時間間距與位移之關係方程式。相較於傳統量測儀器，本研究雷射位移量測儀器之數據處理快速，節省了計算與測量的時間，且因前置作業方便快速，可縮短封橋時間避免民怨並有效率的量測到結構物變形。而目前開發階段透過實驗室中對H 型鋼梁的靜、動態撓度變形量測實驗，証明本研究所開發之量測系統具有相當好的發展性。 It is an important and essential work to measure the deformation of the structure on health diagnosis. The far distance and noncontact optical measuring methods are convenient and popular because of structure fast diagnosis, but with some difficulty. This research developed a new type of noncontact structure displacement measurement system. The fundamental theorem of it is to transform the time interval variation of signals from ptical sensing instrument to a corresponding displacement variation. The key work of it is solving the triangle geometric relationship to formulate the relation between time interval and displacement. The laser displacement measurement system developed in this research has fast data processing algorithm so it can be more efficient compared with traditional measurement systems. Laboratory and field test results demonstrate that the remote laser displacement measurement system is quite accurate and efficient for structure condition evaluation.
