Remote bridge flexibility monitoring system and method based on double-base point calibration method

Abstract

The invention discloses a remote bridge flexibility monitoring system and method based on a double-base point calibration method. The system is communicated with a liquid storage tank, a double-base point calibration module and flexibility measurement sub modules through connection pipes, pressure values of pressure sensors corresponding to the double-base point calibration module and the flexibility measurement sub modules are synchronously acquired through a data synchronization gatherer, the quantity of the flexibility measurement sub modules is set according to bridge length, and flexibility of each measurement point is monitored by an industrial control computer through a preset method. The system is advantaged in that the structure is simpler, and system cost is reduced. According tothe method, the pressure values of each measurement point and the pressure sensors of the double-base point calibration module are acquired in real time, the pressure value of each pressure sensor and liquid level change pressure of ith measurement point caused by bridge warping at the certain time are calculated step by step, the bridge flexibility of the ith measurement point is calculated in combination with height between the ith measurement point and the liquid surface of the liquid storage tank and a vertical distance L between two pressure sensors of the double-base point calibration module, and measurement precision is improved.

Description

technical field [0001] The invention relates to the technical field of bridge health monitoring, in particular to a bridge deflection remote monitoring system and monitoring method based on a double base point calibration method. Background technique [0002] Bridge deflection is an important parameter to measure the life and health of bridges. At present, domestic and foreign scholars have done a lot of research on bridge deflection monitoring. The main monitoring methods are as follows: [0003] (1) Level method: [0004] Usually, the bridge deflection is measured manually with instruments such as theodolites and dial indicators, but these methods are difficult to accurately reflect the safety status of the bridge under the dynamic load generated by the passing of vehicles, and cannot meet the needs of long-term automatic monitoring of deflection. Dynamic measurement is a real-time and online monitoring of bridge deflection, which can accurately reflect the real-time def...

AI Technical Summary

Problems solved by technology

This method is expensive and complicated to operate, and is not suitable for routine use

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