New Intelligent Logistics Transmission System

With the development of modern technology and the improvement of standard of living, convey system is applied in business and industrial fields, such as the luggage transportation line of the aerodrome, the sorting machine system in post, and the transportation line in mine, etc. Convey system was driven by rotary motor in the past. The shortage of this kind of system is that the mechanical frictional waste and noises cannot neglect. This results in the low efficiency and the short life of the equipment. And for that, it can't guarantee the reliability of the system for long term running.This paper will introduce you a new convey system for suspend which is of push type and applied in linear motion occasions. The new system is driven by linear motor and controlled by logical programmable controller (PLC) and the microprocessor (PIC). Because there isn't middle transmission equipment in the system, in its performance in the noises and the mechanical frictional waste, it is a more superior way than the traditional one, which is driven by rotary motor. The system was designed in module. And this make the performance of the control system improved prominently and the function of the system can be extended or reduced conveniently.Based on the introduced of the main structure of the linear-motor-driven suspending push-type convey system, this paper expatiate the logical control subsystem and driven control subsystem of this convey system.First, this paper introduces the basic principle, the development, the category of linear motor and its control technology. Second, the mechanical structure and the electrical principle of the convey system. Third, the principle and realize of the technique used in the logical control subsystem and the driven control subsystem is expatiated. The technique include the variable frequency technology, the direct self-control technology, the EMI, etc.Finally, this paper summarizes the research course and advances the prospect of the project.