公开(公告)号：US20130250278A1

公开(公告)日：2013-09-26

申请号：US13848523

申请日：2013-03-21

Applicant: KANSAS STATE UNIVERSITY RESEARCH FOUNDATION

Inventor： Weixin Zhao ,  Burdette Terry Beck ,  Robert Peterman ,  Chih-Hang Wu

IPC: G01B11/16

CPC classification number: G01B11/162

Abstract: A portable optical sensor for measuring surface strain in an object, such as pre-stressed concrete articles, is provided. The sensor is a modular device comprising at least first and second modules, each of which includes a laser and image sensor. When placed adjacent to the object, the laser of each module illuminates respective, spaced-apart areas of the object's surface and each module's image sensor captures at least a portion of the light reflected from the illuminated area and generates a speckle image of the area. Speckle images of the areas taken at various times and/or under various object stress conditions are compared to arrive at a surface strain measurement for the object.

Abstract translation: 提供了用于测量物体中的表面应变的便携式光学传感器，例如预应力混凝土制品。 传感器是包括至少第一和第二模块的模块化装置，每个模块包括激光和图像传感器。 当放置在物体附近时，每个模块的激光照射物体表面的相应的间隔开的区域，并且每个模块的图像传感器捕获从照明区域反射的光的至少一部分并产生该区域的斑点图像。 比较在不同时间和/或各种物体应力条件下拍摄的区域的斑点图像，以获得物体的表面应变测量。

公开(公告)号：US08917384B2

公开(公告)日：2014-12-23

申请号：US13848523

申请日：2013-03-21

Applicant: Kansas State University Research Foundation

Inventor： Weixin Zhao ,  Burdette Terry Beck ,  Robert Peterman ,  Chih-Hang Wu

IPC: G01B11/16

CPC classification number: G01B11/162

Abstract: A portable optical sensor for measuring surface strain in an object, such as pre-stressed concrete articles, is provided. The sensor is a modular device comprising at least first and second modules, each of which includes a laser and image sensor. When placed adjacent to the object, the laser of each module illuminates respective, spaced-apart areas of the object's surface and each module's image sensor captures at least a portion of the light reflected from the illuminated area and generates a speckle image of the area. Speckle images of the areas taken at various times and/or under various object stress conditions are compared to arrive at a surface strain measurement for the object.

Abstract translation: 提供了用于测量物体中的表面应变的便携式光学传感器，例如预应力混凝土制品。 传感器是包括至少第一和第二模块的模块化装置，每个模块包括激光和图像传感器。 当放置在物体附近时，每个模块的激光照射物体表面的相应的间隔开的区域，并且每个模块的图像传感器捕获从照明区域反射的光的至少一部分并产生该区域的斑点图像。 比较在不同时间和/或各种物体应力条件下拍摄的区域的斑点图像，以获得物体的表面应变测量。