ROBERT J PETERMAN
Engineering in Manhattan, KS
License number
Pennsylvania ET019717
Category
Engineers
Type
Engineer in Training
Address
Address
2
Manhattan, KS 66503
Pennsylvania
Pennsylvania
Professional information
Portable High-Resolution Non-Contact Modular Sensor For Surface Strain Measurement
US Patent:
2013025, Sep 26, 2013
Filed:
Mar 21, 2013
Appl. No.:
13/848523
Inventors:
Burdette Terry Beck - Manhattan KS, US
Robert Peterman - Manhattan KS, US
Chih-Hang Wu - Manhattan KS, US
Robert Peterman - Manhattan KS, US
Chih-Hang Wu - Manhattan KS, US
International Classification:
G01B 11/16
US Classification:
356 355
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.