Acceleration sensor based bridge cable vibration frequency detection method and device

Abstract

The invention discloses an acceleration sensor based bridge cable vibration frequency detection method and device. The acceleration sensor based bridge cable vibration frequency detection method comprises the steps of installing auxiliary machines at the positions of the same height of cables of a bridge to be detected; collecting the vibration information of the corresponding cables by the auxiliary machines through digital acceleration sensors timely and sending the vibration information to the same host; collecting the multi-channel vibration information corresponding to the cables by the host and performing processing according to the multi-channel vibration information to obtain the vibration frequency of every cable. The acceleration sensor based bridge cable vibration frequency detection device comprises the host and the plurality of auxiliary machines; the host comprises a main controller, a main communication module, a storage module, a main power supply module and a display module; every auxiliary machine comprises an auxiliary controller, the digital acceleration sensor, an auxiliary communication module and an auxiliary power supply module; the auxiliary communication modules are connected with the main communication module through a wireless network. According to the acceleration sensor based bridge cable vibration frequency detection method and device, the detection accuracy is high, the circuit structure is simple, wiring is not required, the installation is simple and rapid, the anti-interference capability is strong, the detection speed is high, the measuring efficiency is high, the universality is good, and the application is wide.

Description

technical field [0001] The invention relates to the technical field of bridge engineering safety, in particular to a method and device for detecting the vibration frequency of a bridge cable based on an acceleration sensor. Background technique [0002] With the rapid growth of the number of bridges in our country and the increasingly complex and harsh operating environment of bridges, the safety problems of bridge engineering have become increasingly prominent. According to incomplete statistics, there were nearly 50 bridge collapse accidents in my country during the period from 1999 to 2012, which caused huge loss of life and property and bad social impact. The safety of bridge structures is getting more and more attention from the government and society. Cable is a structural component that can efficiently withstand tension, and is widely used in large cable-bearing bridges such as cable-stayed bridges, suspension bridges, and arch bridges. As the main load-bearing comp...

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Problems solved by technology

[0005] However, there are significant deficiencies in the technical solution of bridge cable vibration frequency detection in the prior art:

Therefore, the existing piezoelectric sensors are often difficult to achieve satisfactory results in the cable frequency test, which greatly affects the accuracy of the cable force test, and the circuit structure is complex

[0007] (2) The technical solution for detecting the vibration frequency of bridge cables in the prior art is a single-point device, which can only perform single-point measurement for a single cable, and the measurement equipment is connected by wired cables, the installation and wiring are complicated, and it is troublesome to carry. Due to the long cable, the equipment is greatly disturbed by peripheral signals, and it is impossible to measure multiple cables at the same time. The measurement efficiency for bridge zippers is very low, and it is not convenient to compare the measurement results of multiple cables. to the requirement of accurate measurement

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