Research On Anti-Collision System Of Tower Crane

With the acceleration of urbanization process in China, tower crane as an important construction machinery, has become an indispensable tool in construction work. As the usage of tower cranes increases, the tower crane accidents grows, and brings great threats to people’s lives and property. Tower crane collision problem is getting people’s attention. Since it is difficult to avoid the tower crane accidents only by the operators, an effective tower crane anti-collision monitoring system is very necessary.This paper proposed a method to calculate the interference angle of the adjacent towers, to determine whether the two tower arms came into the interference region. The algorithm was simulated by MATLAB. The calculated angle values were compared with the measured angle values, and were proved to meet the accuracy requirements.Anti-collision algorithm of tower crane was designed based on real-time computing. When both arms came into the interference region, the algorithm calculated the minimum distance between hook and tower arm of the adjacent towers, using rotation angle, amplitude magnitude, lifting height. The system would alarm or brake as the distance was less than the safe valve. The correctness and feasibility of the algorithm was verified by MATLAB programming.The paper designed composition of the tower crane anti-collision monitoring system. Data was transported by ZigBee wireless network transmission technology. After analysis the framework agreement, network topology, the paper determined mesh network topology, designed the networking algorithm and the structure of communication frame. Features of controller, ZigBee wireless communication modules, encoders and display were analyzed. Status of the tower crane were monitored though the display.The paper simulated the settings of tower crane anti-collision monitoring interface by GUI programming. The interfaces were used to calibrate the sensors, input the location and structure parameters of the tower cranes, calculate rotation angles of the interference regions, monitor the operating status and alarm, and simulate the shift between interfaces and data storage.