Autonomous Crack
Comparometer
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Damian Siebert |
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Advisor: Prof. Charles Dowding |
Presentation Outline
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Background |
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Current Research, Phase I |
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Future Work, Phase II & III |
Problem
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Need a new approach in vibration
monitoring |
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Current practice |
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Measure ground motion and compare with
house damage from past studies |
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People see cracks in there houses |
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Don’t understand ground motion |
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Despite past evidence difficult to
convince |
Solution
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Create a system that will: |
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Measure change in crack width due to
both long term and dynamic effects |
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Compare changes in crack width with
temperature, humidity, and dynamic excitation |
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Comparison should be |
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Accessible easily to general public |
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Regenerated often |
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Graphically presented |
Factors Influencing Crack
Movement
Factors Influencing Crack
Movement
Crack Width Change
Current Research, Phase I
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Hardware |
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Automation of System |
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Test House Data |
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Web Site |
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Hardware
Sensor Employed
Sensor Problems
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Electronic Drift |
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Thermally Induced Hysteresis |
Sensor Problems
Sensor Correction
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Null Sensor |
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Near-by but not Across the Crack |
Sensor Correction
Sensor Correction
Slide 16
Test House
Sensor Locations
Results
Results
Results
Results
Web Design Requirements
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Graphical Interface Easily Understood
by the Lay Public |
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Quick Loading |
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No Scrolling |
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Consistent Feel |
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Viewable on any browser |
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Compatible with older computers |
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Easily Extensible |
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New Pages will be added in the Future |
Web Display Components
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Background Information About Crack
Movement |
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Location |
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Sensors in House |
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House in Neighborhood |
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Weather Information |
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Temperature |
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Humidity |
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Crack Displacement Information vs. |
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Weather |
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Vibration |
Conclusions
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Crack Width Changes are Effected |
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Most by Weather |
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Humidity |
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Temperature |
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Moderately by Habitation Vibrations |
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Near by – walking down stairs |
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Far away – slamming a door across the
room |
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Least by Construction Vibration |
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Blasting |
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Pile Driving |
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Etc. |
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System that Works!! |
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Autonomously Records, Analyzes, and
Displays Data |
Future Work, Phase II
Hardware Changes
Future Work, Phase III
Hardware Changes
Future Work
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Sensors |
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More Research Into Better Sensors |
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Web Improvement |
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Security |
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Web Interactive Components |
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Graphical Tutorials |
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Self Guided Tours of Background
Information |
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Addition of Blast Induced Vibration |
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Transducers |
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Additional Programming |
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Give out URL to a Community |
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Feed Back |