| In recent years, with the China's economic developing rapidly and the process of urbanization accelerating, new high-rise buildings are on increased demanding for elevators. at the same time, family and villas also inctease to use small elevators, developed cities increase the demand for freight elevator, and there are many old elevators waiting for replacement, so that the elevator market is very impressive.Because the situation that the high-performance elevator market was monopolized by foreign elevator companies, in order to enter the elvator market as quickly as possible, improve the competitiveness of domestic elevator and realize the industrialization, based on the actual needs of the project for mid-end and low-end elvator market, we designed a low-cost, low-power , safe, reliable, being convenient for replacement of old elevators, and high cost performance elevator control system.In order to simplify the task for the master processor and to enhance system stability, the elevator control system used dual-ATmega128 chips as the main control system chips, and used CAN bus as a means of communication of all the elevator's components. In addition, in order to provide a parallel communication interface to upgrade the old elevator control system, the system used a CPLD chip as the master processor's expansive IO port.This paper's main contents are as follows:First, after a comprehensive analysis of the elevator control system development of situation at home and abroad, and studying a large number of elevator technical information, I did a comprehensive needs analysis on requests of hardware and software development. Arming at the requirement of the elevator control sysytem, we proposed an overall software and hardware solutions and defined the control system components interface functions according to Interface requirements.Second, I designed master board's hardware of the elevator control system and the CAN bus hardware for the components of elevator control system. The paper briefly introduced the principle of the car eontroller and outside call conrtoller. Third, I designed SPI-bus and CAN-bus drivers, defined the CAN-Bus application protocols, and succeeded in completing communication between the masterboard and other components, then I designed CPLD program, took part in designing Human-Computer Interaction program, designed elevator control algorithms, designed the core program for the elevator masterboard, and let the elevator run safely and reliably in some conditions.Fourth, article briefly described the test methods and test results on the elevator control system test platform, the test results showed that the elevator control system running well, and passed the first stage of acceptance.Final,the paper summarized the work of this thesis and proposed the prospects of future work. |
