Department of Civil Engineering, Nagoya Institute of Technology Structural/Earthquake Engineering Laboratory |
Development of 3D Measuring Method for Test Specimen |
3D Measurement from images of deformed structural test specimens | |
Accurate measurement of deformation of a specimen | |
Determination of 3D Coordinates |
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Taking a picture with a reference sheet in the image
The position and the angle of the camera are computed using the reference sheet
The space coordinates of the object point are determined using photogrammetric method
Photogrammetric method |
3D Shape measurement of a corroded steel tensile test coupon | |
Accurate evaluation of ultimate behaviors of corroded steel structure Observation of 3D geometry after corrosion |
Shape measuring system Ball reference point |
Surface Measuring System Using XY Stage{Laser Displacement Sensor | |
Usual shape measuring system covers only a part of an object. To measure a full shape of an object, some data patching method is necessary. | |
Use of Ball Reference Points | |
The shared reference points (3 points or more) in each surface are measured. Whole 3D data is constructed by data patching method using shared reference points. |
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Example of Measurement of Corroded Tensile Test Piece | |