| Author: | Lei, Junjie |
| Title: | Novel mobile robotic system for structural health monitoring |
| Advisors: | Jing, X, J. (ME) |
| Degree: | M.Sc. |
| Year: | 2021 |
| Subject: | Structural health monitoring Detectors Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Mechanical Engineering |
| Pages: | viii, 63 pages : color illustrations |
| Language: | English |
| Abstract: | In modern life, structural health monitoring is essential for large-area load-bearing structures. Nowadays, the commonly used method of structural health detection is to implant sensors into the structure during the construction of the structure or form a sensor network on the surface of the structure by bonding in the later period. However, these two installation methods have many problems in actual use, such as uneven bonding interface, sensor life is lower than structure life, sensor maintenance cost is high, and so on. A large number of implanted sensors will also increase the weight of the structure itself and affect the service life. In order to solve the above problems, this article provides a movable structural health monitoring device, which adsorbs the sensor probe on the surface of a large-area structure (wing, bridge, etc.) through the transportation of a wall-climbing robot. The wall-climbing robot carries the wave generator and accelerometer. The detection and waveform monitoring are realized by the acceleration beam composed of three accelerometers that detect vibration, so as to find structural defects. Focusing on the key technologies of mobile structural health monitoring equipment, the research content of this article mainly includes: (1) Use the principle of vacuum suction to design a wall-climbing robot that acts on large surface structures mainly for wings and verify the feasibility of its work; (2) Analyze the mems accelerometer sensor model used in structural health monitoring, and introduce the basic principles of this model for structural health monitoring. (3) Design experiments to verify the feasibility of the scheme, and discover different waveforms by detecting different cracks. The mobile structural health detection equipment studied in this paper can take advantage of flexibility and form a mobile and expandable sensor network. It can be used not only for real-time monitoring of large surface structures, but also for ground repairs to improve inspection efficiency during maintenance. |
| Rights: | All rights reserved |
| Access: | restricted access |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 5932.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 1.3 MB | Adobe PDF | View/Open |
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