Tsinghua University

China Road & Bridge Corporation

Qiuhai Lu

Zhihai Xiang

Yao Zhang

Hong Liu

Yanhua Wang

Xiaowei Dai

Yaoguo Sun

Lianyou Li

Jianchu Zhang

Zhaopu Shen

Zhihuai Li

A tap-scan bridge damage detection system comprises: a mobile cart () capable of moving on a to-be-detected bridge; a tap subsystem () mounted on the mobile cart () and used for applying a tap load to the to-be-detected bridge; a signal acquisition subsystem () mounted on the mobile cart and used for acquiring a response signal transferred from the to-be-detected bridge to the mobile cart; and a signal processing apparatus () connected to the signal acquisition subsystem () and used for receiving and processing a signal acquired by the signal acquisition subsystem (), and outputting the bridge damage information processed result. The tap-scan bridge damage detection system can detect bridge damage in a simple, convenient, efficient and accurate manner.

Tap-scan bridge damage detection system

The present invention relates to a structural damage detection method for detecting damage of a structure. The method comprises scanning the surface of the structure with a tapper tapping with a tapping force at a predetermined frequency band while scanning; measuring the response signals transmitted from the surface of the structure; transforming the measured signals to acquire the signal spectrum at each position of the structure surface; intercepting from the signal spectrum a spectrum envelope; calculating a damage indicator at each position of the structure surface; and determining a position where the damage indicator changes abruptly as a position of structural damage. The present invention further relates to a structural damage detection system utilizing the structural damage detection method and a structural damage detection device for use therein.

Structural damage detection system, device and method

Growing community of inventors

Beijing, China

Qiuhai Lu