Wireless actuation of piezo-elements for the structural health monitoring of carbon-fiber-reinforced-polymers |
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| Affiliation: | 1. Friedrich Wilhelm Bessel Institut Forschungsgesellschaft m. b. H., Bremen 28359, Germany;2. Faserinstitut Bremen e.V., Bremen 28359, Germany;3. University of Bremen (FB4), Bremen 28359, Germany;4. Institut für Mikrosensoren, -aktoren und systeme (IMSAS), Bremen 28359, Germany;1. Freiburg Materials Research Center FMF, Stefan-Meier-Str. 21, D-79104 Freiburg, Germany;2. Institute for Macromolecular Chemistry of the University of Freiburg, Stefan-Meier-Str. 31, D-79104 Freiburg, Germany;1. Key Laboratory for Robot and Intelligent Technology of Shandong Province, College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, PR China;2. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR China |
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| Abstract: | The goal of this research is to evaluate wireless actuation of Piezo-Wafer-Active-Sensors (PWAS) to generate Lamb-waves on Carbon-Fiber-Reinforced-Polymers (CFRP). Transmission is done by implementing inductive coupled coils. However, CFRP behaves as an electrical conductor, shielding radio waves with increasing worse effects at higher frequencies. Thus, there is a great interest to evaluate the kilohertz ranges. The actuator node is prepared by combining the PWAS bonded to the surface with an inductive coil and tuning all in resonance by adding passive components. In this way, the actuator receives a windowed-signal at the frequency provided by the coil system. An actuator node is prepared in order to evaluate the power transmission; while three sensors are used to measure the responses from the material. The measurements demonstrate that it is possible to wireless excite Lamb-waves. Finally, preliminary results show the feasibility to determine the presence of structural failure. |
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| Keywords: | Lamb-waves SHM PWAS Wireless sensors WPT |
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