Abstract
Continuous structural health monitoring has the potential to significantly improve thesafety management of aged, in-service civil structures. In particular, monitoring of localdamage growth at hot-spot areas can help to prevent disastrous structural failures.Although ultrasonic nondestructive evaluation (NDE) has proved to be effective inmonitoring local damage growth, conventional equipment and devices are usually bulkyand only suitable for scheduled human inspections. The objective of this research is toharness the latest developments in embedded hardware and wireless communication fordeveloping a stand-alone, compact ultrasonic device. The device is directed at thecontinuous structural health monitoring of civil structures. Relying on batterypower, the device possesses the functionalities of high-speed actuation, sensing,signal processing, and wireless communication. Integrated with contact ultrasonictransducers, the device can generate 1 MHz Rayleigh surface waves in a steelspecimen and measure response waves. An envelope detection algorithm based onthe Hilbert transform is presented for efficiently determining the peak values ofthe response signals, from which small surface cracks are successfully identified.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
