PLC-based Beidou positioning method for bridge swivel

Abstract

The invention discloses a PLC(Programmable Logic Controller)-based BeiDou positioning method for a bridge turning body. The bridge turning body comprises a rotating beam body and a fixed beam body, wherein the rotating beam body is driven by a lifting rotating mechanism to be connected with the fixed beam body. The BeiDou positioning method for the bridge turning body comprises a step of positioning and mounting a positioning sensor of the rotating beam body, a step of enabling the PLC (4) to control the rotating beam body (1) to be lifted and positioned, a step of carrying out rotation and alignment between the rotating beam body and the fixed beam body (2), and a step of carrying out positioning data transmission and control between the PLC (4) and an intelligent terminal. The PLC-basedBeiDou positioning method for the bridge turning body has the beneficial effects that due to combination of reality and virtuality, a whole process is controlled by the PLC, the speed is adjustable, and intelligence and reliability are realized.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a PLC-based frequency conversion control system for hoisting and swiveling bodies of railway bridges. Background technique [0002] With the rapid improvement of the country's economic level, the transportation industry has also developed vigorously. Due to the influence of some terrain or existing traffic facilities, bridge hoisting and swivel construction are more and more widely used in bridge construction. Compared with traditional bridges, the swivel hoisting and bridge construction techniques have the characteristics of not interfering with traffic, uninterrupted navigation, crossing deep ditches, rivers, and roads with frequent traffic, and the construction is fast and cost-effective. [0003] Due to the heavy weight of the swivel body, the long bridge, irregular shape of the bridge, and the complex geographical environment of the bridge, it is difficult to co...

AI Technical Summary

Problems solved by technology

[0005] First: the weight of the poured beam is huge, the geographical environment of the bridge is complex, the transportation process of the beam is difficult, the transportation cost is high, and it consumes manpower and material resources;

[0006] Second: In the process of hoisting by crane or spreader, due to the action of wind, the beam body is prone to sway. In the existing hoisting process, it is often necessary to detect the wind speed within a radius of several kilometers. Once the wind speed exceeds the hoisting wind speed, it needs to stop Hoisting;

[0007] Third: The risk factor of hoisting construction is high. In order to facilitate the observation of construction, the construction time is generally during the day, and it is inevitable that there will be road blockades, causing traffic congestion around

[0008] Fourth: Due to the use of a spreader crane for hoisting and swivel construction, due to the long hoisting rope, it is easily affected by the vibration of the crane and the wind, resulting in low hoisting accuracy, difficult swivel construction, and long construction time of the bridge, which cannot meet the requirements

[0009] Fifth: In the process of bridge positioning and installation, the position of the beam body is observed and controlled manually, and the observation accuracy is low and it is difficult to control

[0010] Sixth: During the swivel construction, the motor and other swivel components used in the swivel construction cannot be recycled, which wastes resources and high construction costs

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