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Saeki Lab
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The lab uses sensors to detect abnormalities in structures.
AboutAbout the lab
Understanding the condition of structures with sensors and images.
The Saeki Lab (Structural Engineering Lab) researches sensing systems that detect abnormalities in civil infrastructure structures such as road accessories and power transmission towers.
It measures the acceleration response of a structure and analyzes the data appropriately to determine whether an abnormality exists.
The lab is also developing technologies that use sound and images to assess the condition of structures.
It also works on research that deploys and applies the fundamental technologies developed in the lab to real sites, in cooperation with companies.
Key terms
- Acceleration response
- The magnitude of motion that an accelerometer can measure when a structure shakes. Abnormalities are investigated from this record.
- MEMS sensor
- A sensor that combines tiny mechanical parts and electronic circuits on a single small chip. It is used to measure the vibration of structures.
- Structural integrity
- Whether a structure such as a bridge or a steel tower can be used safely, without abnormalities or deterioration.
ResearchResearch themes
As many infrastructure structures built during the period of rapid economic growth age, the lab researches technologies for maintaining them more efficiently. It develops technologies that use acceleration and images to assess the condition of structures, and also works on deploying them at real sites.
*Illustrative imageAssessing structural integrity
The lab acquires the acceleration response of structures with MEMS sensors and analyzes it to diagnose abnormalities. It also develops technologies that estimate condition through structural analysis. Examples include detecting abnormalities in road information boards and detecting abnormal vibration in power transmission cables.
*Illustrative imageAssessing condition using video images
An accelerometer can measure the response at only one point, but analyzing video images yields densely spaced, time-synchronized data, although with lower accuracy. The lab combines image analysis and vibration analysis in an attempt to generate information that was not available before.
*Illustrative imageDeploying sensing technologies at real sites
The lab deploys and applies the core technologies developed through its earlier work, such as wireless sensor networks, GPS, acceleration measurement, and inverse analysis, at real sites. Some of these have become joint research with companies and with faculty at other universities.
MembersFaculty
- ProfessorMasayuki Saeki
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Structural Health Monitoring System Inside Bridge Deck Panel IA ( )” Federal Highway Administration / Public domain (cropped)
- Assessing structural integrity: “Steel Bridge Inspection - Snooper truck” Oregon Department of Transportation / CC BY 4.0 (cropped)
- Assessing condition using video images: “Security camera monitoring for school security” Wikideas1 / CC0 (cropped)
- Deploying sensing technologies at real sites: “Field-installation-of-a-water-level-sensor-inside-a-flow-container” Z. Liu, C. W. Higgins / CC BY 3.0 (cropped)
- Related lab (加藤研究室): “Microscopic-image-of-corroded-rebar-containing-25-of-fly-ash-concrete” V. M. Sounthararajan, A. Sivakumar / CC BY 4.0 (cropped)
- Related lab (木村研究室): “Wind turbines along North Middle Road, Essex County, Ontario” Crisco 1492 / CC BY-SA 4.0 (cropped)
- Related lab (二瓶研究室): “Flowerdale River at Meunna, Tasmania, Australia” NeoGeneric / CC BY-SA 4.0 (cropped)
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