A data acquisition and alarm device for an anti-collision pier wireless monitoring and alarm system

Abstract

The invention discloses a data collecting and alarming device of a wireless anti-collision pier monitoring and alarming system.The device comprises an analog signal filtering and signal processing module, a data latch module, a programmable logic module, a main control module, a level conversion module and a data communication interface module; the analog signal filtering and signal processing module comprises three channels, and the input ends of the channels are connected with a south-north sensor, an east-west sensor and a vertical sensor respectively.According to the data collecting and alarming device, the design method that the three channels conduct data collecting and signal processing synchronously is adopted for the characteristics of low-frequency signal collecting and bridge anti-collision pier structure testing, the three channels are independently designed, the main control module ensures complete synchronization of the three channels through a synchronous starting analog-digital conversion signal generated through massive programmable logic device decoding, the problems that in traditional data collecting, more channels are needed, and a large error is generated in synchronous collecting are solved, therefore, completely synchronous collection of the three channels is achieved, and the vibration monitoring requirement of an anti-collision pier is met.

Description

technical field [0001] The invention relates to bridge health monitoring technology, in particular to a wireless monitoring and alarm system for anti-collision piers. Background technique [0002] In recent years, the catastrophic accidents of ships colliding with bridges are increasing, and the casualties, property losses and environmental damage caused by the accidents are becoming more and more serious. In order to avoid bridge collision accidents, people have designed anti-collision piers for bridges. The anti-collision piers are independent structures and are separated from the main bridge by a certain distance, so the necessity of monitoring as an independent object is highlighted. With the improvement of nonlinear finite element technology and the continuous improvement of computer hardware level, the numerical simulation of the collision process has become an effective way to solve the problems related to ship-bridge collision. The monitoring purpose of the anti-col...

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Problems solved by technology

[0005] The purpose of the present invention is to design a data acquisition and alarm device for the anti-collision pier wireless monitoring and alarm system to solve the problem of large number of acquisition channels, large synchronous acquisition error, poor low-frequency performance, large power consumption, and high cost price in the general data acquisition and alarm device. , communication difficulties, high maintenance and after-sales service costs

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