| In recent years,with the rapid development of construction industry modernization,tower crane is more and more used in high-rise building construction site.On the one hand,the tower crane has brought a lot of convenience to the construction,on the other hand,because of the complex working environment and poor safety of working methods,various security risks cannot be ignored.The safety protection device used by traditional tower crane is not safe and flexible enough,the level of intelligence and automation of safety monitoring technology is not high,and the tower crane often swings out of control because of frequent operation and external interference,which is easy to cause accidents such as hanging of suspended objects and tower crane inclination or even overturning.The remote safety monitoring of tower crane in this paper can solve the problem of not timely remote management of tower crane and help to establish the management accountability mechanism.At the same time,the study on anti-swing control is helpful to solve the accident problems caused by insufficient experience or fatigue operation of tower crane drivers.Firstly,this paper designed the electrical system of tower crane remote safety monitoring.Compared with the characteristics of traditional tower crane electrical system,the distributed electrical system is used to study the tower crane electrical safety protection,and design the related electrical control methodSecondly,this paper combined Io T technology,GPRS technology,cloud platform technology and embedded technology to design the software and hardware of tower crane remote security monitoring.The system consists of tower crane monitoring equipment,Gizwits and remote mobile client.The device used STM32F103RCT6 chip as the main control chip,and used GPRS module to configure into the network,which can realize data acquisition,remote real-time monitoring and remote query management.Finally,this paper used fuzzy adaptive PID control to study the positioning and anti-swing of tower crane.Lagrange equation is established to construct the dynamic model of tower crane operation;Then the fuzzy anti-swing controller is designed to control the displacement and swing angle of the trolley.Finally,the anti-swing simulation experiment is realized in Simulink environment.The simulation results show that the fuzzy adaptive PID controller can simulate the artificial anti-swing control of tower crane,which has the characteristics of accurate positioning,strong robustness and good ability to suppress the swing,and provides a new idea for finding the anti-swing control that can replace the artificial control. |
