Research On Tower Crane Anti-collision System Based On WSN

Tower crane has been widely used in building construction, the tower crane safety incidents happen will result in significant economic and social losses. Aiming at designing tower crane anti-collision system, the monitoring system frame of tower cranes condition, anti-swing control and anti-collision technology are researched in detail in this paper.This paper puts forward a scheme of a new intelligent system:with Wireless Sensor Networks technology as the foundation, using the network architecture of the Internet of Things and embedded technology. In order to ensure the real-time nature of the system, the strengths and weaknesses of the centralized control mode are compared and analyzed in this paper. Mixed-control mode is proposed, which combines the advantages of distributed control and centralized control. The system is divided into individual controller for tower crane tower crane operation status monitoring and control centralized monitoring control center. It uses the wireless network mode of star topology structure. This paper makes a presentation on the structure and function of the intelligent system based on wireless sensor networks. This system provides industrial control with a simple, real-time, low cost, high reliability and efficient methods.In the tower crane work process, swaying of loads it is easy to happen when the car running, as well as collision accident between tower cranes. So, it has important application value to research the technology of anti-sway of load controller and anti-collision control algorithm. The two technologies are researched in this paper.Aiming at the phenomenon of tower crane load swing during operation, the tower crane anti-sway of load controller is designed in this paper based on the PID control theory. Lagrange Equation is used to establish the mathematical model of the load system. The controller adopts the structure of double closed loop control system to control the sway of load. The outer loop is to locate the dolly and the inner loop is to control the sway of load. By adjusting the control parameters so that the controller has the advantages of high precision and fast, and simulation comparison experiments are did by MATLAB/Simulink software. The simulation research shows that this anti-sway algorithm can quickly eliminate load swing so that the car quickly to reach a goal, and the system adjustment time is short, the overshoot is relatively small.Aiming at the problem of the tower cranes anti-collision, homogeneous transformation theory is used to establish the model of tower cranes. The tower crane space moving model is established in the first place. Then, tower crane collision detection algorithm is proposed using active anti-collision thinking. The feasibility of this algorithm is provided by simulation using MATLAB. The experiment proofs that the algorithm can effectively predict the distance of the tower crane collision point so that to realize the anti-collision decision in the same area. This paper develops the tower crane anti-collision system based on WSN based on the above research results. The simulation experiment proves that this system can effectively control tower crane load swing, and then test collision point distance between tower cranes, so that to prevent tower crane collisions and prevent potential risks.