Research on the wireless strain acquisition system of expressway bridge

Expressway bridge operation in high traffic speed. The high traffic speed increase the risk of bridge structure damage, and also increase the difficulty and risk of bridge inspection personnel work simultaneously. Traditional cable bridge structure detection methods cannot meet the needs of rapid measurement and ensure the test personnel safety. In view of the above question, a wireless strain acquisition system for expressway bridge is proposed in this paper. The system can implement the remote wireless bridge structure strain measurement, which can reduce the retention period of inspection personnel on the expressway, and to achieve the goal of ensuring the inspection personnel safety. Combined with the structure detection characteristics of the expressway bridge, the system was developed which has three components: strain acquisition circuit, data transmission network and PC acquisition software. With the pure bending pilot system, test and analysis results indicate that the collected data is accurate and reliable. The system proposed in this paper has the advantages of high testing efficiency, flexible acquisition and control, good stability, low cost and so on. The system has extensive appliance and wide foreground, can be integrated into the bridge health monitoring system, and can also be applied to other engineering fields of strain measurement.