High-precision bridge displacement sensor based on millisecond-level time synchronization technology

Abstract

The invention discloses a high-precision bridge displacement sensor based on a millisecond-level time synchronization technology. The bridge monitoring system comprises an MCU control circuit, an RS485 communication circuit, a time synchronization circuit, an X-axis inclination angle sensing circuit, a Y-axis inclination angle sensing circuit, an ADC processing circuit, a temperature sensing circuit, and a power supply management circuit; the RS485 communication circuit communicates with a data base station; the time synchronization circuit is used for monitoring waveform signals; the X-axis inclination angle sensing circuit and the Y-axis inclination angle sensing circuit are used for sensing the angle change of a bridge monitoring point in the X-axis or Y-axis direction; the temperaturesensing circuit is used for monitoring temperature change; the power supply management circuit is used for supplying a power supply for the above circuits; the MCU control circuit is connected with the RS485 communication circuit, the time synchronization circuit, the temperature sensing circuit and the ADC processing circuit; and the ADC processing circuit is connected with the X-axis inclinationangle sensing circuit and the Y-axis inclination angle sensing circuit. A millisecond-level time synchronization technology is adopted, 24-hour uninterrupted millisecond-level synchronization error real-time monitoring is achieved, and the limitation that accurate and effective data collection cannot be conducted on a bridge in the driving process is avoided.

Description

technical field [0001] The invention relates to the technical field of bridge monitoring, in particular to a high-precision bridge displacement sensor based on millisecond-level time synchronization technology. Background technique [0002] In recent years, due to the rapid development of economy and traffic, the traffic volume has increased sharply and the phenomenon of overloading and overloading has become prominent in countries all over the world. With the rapid development of the economy, the requirements for traffic capacity are also constantly increasing, and the aging and functional degradation of many bridges have shown an accelerated trend. In order to ensure the safety and durability of large bridge structures and reduce and avoid major losses, it is imminent to monitor and evaluate the working status and structural characteristic parameters of bridge structures. [0003] Due to the fast-moving load on the bridge formed by daily vehicle traffic, the stress points...

AI Technical Summary

Problems solved by technology

Therefore, this solution can only measure the displacement of each monitoring point of the bridge when the road is closed, and cannot achieve 24-hour uninterrupted monitoring

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