Close Range Digital Photogrammetry in Civil Engineering Presented by Sang-Ho Kim CEE 398 Experimental Method in Structural Engineering.

Close Range Digital Photogrammetry in Civil Engineering

Presented by Sang-Ho KimCEE 398

Experimental Method in Structural Engineering

Close Range Digital Photogrammetry CEE 398, Experimental Method in Structural Engineering

Overview

• Introduction

• Applications

• Basic Knowledge

• Photogrammetry in Civil Eng.

• Concluding Remarks

• Links and References

Presented by Sang-Ho Kim


Introduction

• Photogrammetry:

Photogrammetry is the technique of measuring objects (2D or 3D) from photogrammes. Its most important feature is the fact that the objects are measured without being touched.

• Photogrammetry can be divided into:

Far range photogrammetry

- Aerial photogrammetry, etc

Close range photogrammetry

- Terrestrial Photogrammetry, etc



Applications• Architectural & Historical Preservation

• Industrial Machinery

• Aerospace

• Automotive

• Nuclear Power

• Petrochemical, Process & Manufacturing Plants

• Pulp & Paper

• Shipbuilding & Repair

• Medical Science

• Police Department

• Civil Engineering



Application I: Architectural & Historical Preservation

Parliament House - Melbourne



Application II: Industrial Machinery

Smorgon Consolidated Industries



Application III: Police Department (Utah Highway Patrol)

DeChant Consulting Services photogrammetric evidence markers


An incident scene diagram of a crash scene near Salt Lake City, UT



Basic Knowledge

• Triangulation:

If several objects have previously established coordinates, the distance and angle of unknown targets can be calculated.

• Metrology:

3D coordinates can be reproduced from 2D photographs.

• Bundle Adjustment:

The most probable coordinates for each object, the error estimates, and estimates of precision for the entire process are determined through this process.



Photogrammetry in Civil Engineering• Applications in Civil Engineering

- Deformation Measurement in Beam Test

- Crack Measurement

- Densification of Geodetic Measurement of Dam

- Strain Analysis of Solid Wood and Glued Timber Construction



Photogrammetry in Civil Engineering: Case 1

• Automatic Deformation Measurement with a Digital Still Video Camera

- By Markus Niederost, et al., Institute of Geodesy and Photogrammetry Swiss Federal Institute of Technology

- Application of a digital still video camera to the measurement of deformations occurring during the dehydration process of concrete parts over several months




- Results: Deformation vectors are obtained.



Photogrammetry in Civil Engineering: Case 2• Measurement of Concrete Cracks Using Digitized Close-Range Photographs

- By Liang-Chien Chen, et al., Center for Space and Remote Sensing Research, National Central University, Taiwan

- Measurement of crack formation due to concrete expansion by chemical reactions




- The non-contact measurement is employed because of the physical limitations in manual measurements.

- Results: The widths of cracks change from place to place.

- A non-contact measure method improves the traditional time-consuming measurement.




• Photogrammetric Techniques for Deformation Measurements on Reservoir Walls

- By Hans-Gerd Maas, Civil Engineering and Geo Sciences, Delft University of Technology

- Measurement of the 3-D coordinates of signalized targets on a large water reservoir wall in Switzerland




- Repeated measurement of a large number of points is required in short time.

- Photogrammetric data capture can be finished within minutes from a helicopter; processing can be widely automated and the accuracy potential can be in the order of 2-3 millimeters.




• Strain Analysis of solid wood and glued laminated timber constructions by close range photogrammetry

- By Franke, Bettina, et al., Bauhaus-Universität Weimar, Germany

- Measurement of progression of deformations, cracks and deterioration including the loading and relieving of the specimens.




- Measurement of the crack growth for the determination of fracture mechanics parameters of the material wood

- Exact reproduction of geometry of the cracks in the measuring photos




• Investigation of Pre- and Postcracking Shear Behavior of Prestressed Concrete Beams Using Innovative Measureing Techniques

- By Josef Hegger, et al., ACI Str. Journal, V.101, No.2, Mar-Apr 2004

- Method of photogrammetry for the study of the crack opening process of prestressed concrete beams



Photogrammetry in Civil Engineering: Case 5- Algorithm used to determine crack edge

(a) Separation of the cracked elements

(b) Determining the cracked edges of the elements

(c) Calculation of crack opening vector

(d) Determining the displacement components



CONCLUDING REMARKS

• The photogrammetry technique is a powerful and productive tool for accurate and robust measurement.

• The technique has been used in Civil Engineering due to the following advantages.

- Time and efforts can be reduced at any measurement or surveying work.

- The measurement can be repeated many times in short period.

- The data can be transmitted through network immediately.

- Highly concentrated data can be obtained.

- The real-time tracking of measurement is possible.

http://www.univie.ac.at/Luftbildarchiv/index.htmlhttp://www.cee.uiuc.edu/classes/cee398kuc/DigitalOpticalMethods/http://www.geodetic.com/http://www.computervision.com/http://www.ccddirect.com/http://gangeli.customer.netspace.net.au



Useful Links



• Automatic Deformation Measurement with a Digital Still Video Camera

Markus Niederost, et al., Institute of Geodesy and Photogrammetry Swiss Federal Institute of Technology

• Measurement of Concrete Cracks Using Digitized Close-Range Photographs

By Liang-Chien Chen, et al., Center for Space and Remote Sensing Research, National Central University, Taiwan

• Photogrammetric Techniques for Deformation Measurements on Reservoir Walls

Hans-Gerd Maas, Civil Engineering and Geo Sciences, Delft University of Technology

• Strain Analysis of solid wood and glued laminated timber constructions by close range photogrammetry

Franke, Bettina, et al., Bauhaus-Universität Weimar, Germany

• Investigation of Pre- and Postcracking Shear Behavior of Prestressed Concrete Beams Using Innovative Measureing Techniques

Josef Hegger, et al., ACI Structural Journal, V.101, No.2, Mar-Apr 2004

References

Close Range Digital Photogrammetry in Civil Engineering Presented by Sang-Ho Kim CEE 398 Experimental Method in Structural Engineering.

Documents

structural engineering

experimental method

ho kim cee

ho kim slide

civil engineering applications

ut slide

switzerland slide

contact measure method