Application Study on Laser Projection Sensor for Bridge Deflection Detection

Laser projection deflection sensing technology is analyzed and studied delicately.Some improvements on laser source and target are proposed and set in the instrument.To verify the effect of the improvements,a practical bridge experiment in He'ergou bridge with the technology is designed.The measurement results of laser projection method are compared with those of water level deflection instrument.The experiment shows the first one is better in operation and accuracy,especially for those high-fall and long-span bridges.