Expansion joint vibration monitoring system and monitoring method based on piezoelectric ceramic self-powered

Abstract

The invention discloses a dilatation joint vibration monitoring system based on piezoelectric ceramic self power. The system comprises an elastic metal strip, a mounting base, a vibration sensor, a pressing head, a storage battery and a piezoelectric ceramic film. The pressing head comprises a box body connection body, a finger pressing part and a tip part. The mounting base is installed on a bridge pier. The box body connection part is fixedly connected to a box body. One end of the elastic metal strip is fixedly connected with the mounting base. The middle part and the other end of the elastic metal strip are impending, and the upper surface of the other end of the elastic metal strip is in tight contact with the tip part. The piezoelectric ceramic film is pasted to the upper surface or / and the lower surface of the elastic metal strip, and an output end of the piezoelectric ceramic film is connected with a charging port of the storage battery through an electric wire. A power supply port of the storage battery is connected with the vibration sensor through the electric wire. The vibration sensor is installed on the box body. The dilatation joint vibration monitoring system is capable of effectively solving the long-term dilatation joint vibration monitoring power problem and is advantageous by being simple in structure, convenient to install, green and environmental-friendly, and economical and practical.

Description

technical field [0001] The invention relates to the technical field of bridge health monitoring engineering, in particular to a piezoelectric ceramic self-powered expansion joint vibration monitoring system and monitoring method. Background technique [0002] When the temperature and other environmental parameters of the bridge change, there will be longitudinal deformation of expansion and contraction, vertical and transverse bending deformation; under vehicle load, there will be longitudinal displacement and vertical bending deformation. In order to meet the deformation requirements of the bridge, an expansion joint device is usually installed between the beam end or the platform back to allow free deformation such as longitudinal and vertical bending. Bridge expansion joints are prone to damage under the action of vehicle load for a long time. Therefore, it is particularly important to effectively monitor parameters such as vibration and deformation of expansion joints to...

AI Technical Summary

Problems solved by technology

Vibration sensors are usually used to monitor the vibration of expansion joints, but the vibration sensors need power supply, so there is a problem of power supply for long-term monitoring of expansion joint vibration

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