Research on displacement monitoring based on laser spot identification

It is difficult to monitor the displacement of large structures accurately in real time for the health monitoring of structures. We studied a laser displacement monitoring system. When the inclination of the structure is negligible, it can achieve real-time monitoring of the horizontal displacement of the structure precisely. The system is composed of a laser transmitter, a receiver board and a camera. The laser transmitter is fixed on the datum plane. Both the camera and the receiver board are fixed on the structure to be monitored. When the structure has horizontal displacement, that camera monitors the position variation of the laser spot on the receiver board. The actual displacement of the structure is obtained through the camera's built-in program. To evaluate the accuracy of the system, we performed two sets of model experiments and obtained the conclusion by comparing the experimental data, determining that our laser displacement monitoring system can monitor horizontal displacement with a high degree of accuracy.