Related Experiment Video
Updated: May 3, 2026

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
Published on: September 29, 2019
Online bridge crack monitoring with smart film
Benniu Zhang1, Shuliang Wang1, Xingxing Li1
1Department of Information Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
Abstract:
Smart film crack monitoring method, which can be used for detecting initiation, length, width, shape, location, and propagation of cracks on real bridges, is proposed. Firstly, the fabrication of the smart film is developed. Then the feasibility of the method is analyzed and verified by the mechanical sensing character of the smart film under the two conditions of normal strain and crack initiation. Meanwhile, the coupling interference between parallel enameled wires of the smart film is discussed, and then low-frequency detecting signal and the custom communication protocol are used to decrease interference. On this basis, crack monitoring system with smart film is designed, where the collected crack data is sent to the remote monitoring center and the cracks are simulated and recurred. Finally, the monitoring system is applied to six bridges, and the effects are discussed.
Related Concept Videos
Microcracking in Concrete
Leaky Scanning
Wheatstone Bridge
Thus, for accurate resistance measurements, a...

