The Design And Implementation Of Controller In The Railway Calling System

The controller is the core component in the latest railway calling system. There are a number of ways to control the whole system, but these implementations are through controlling the host of the system. The controller discussed in this thesis is an innovative product with many new features, and as the core part of the controlling of the host of the system, it uses digital signal processing theory and technology and mixed-signal microcontroller to achieve the controlling unit for mixed handling.This paper mainly introduces the design and implementation of the control host in two ways, the overall and partial. First of all, the key points of the system design can be grasped from the overall through the analysis of the user functions; and then, the whole system is divided into each special module, detailed step by step to complete the entire system.The First chapter describes the background of the railway calling system. The second chapter describes the overall design of the controller, including the function analysis, equipments requirement analysis, and the design of hardware and software in the railway calling system. The third chapter, the fourth chapter and the fifth chapter describe the specific design details of the controller: the host data management, human-computer interaction systems and control systems.The design focuses on the planning of the overall system and the combination of the hardware system and software system. The design of overall system is based on comprehensive analysis of the user requirements, system planning and product cost. When designing and implementing the main functions of each part, the combination of hardware and software and the developing mode of embedded computer systems are fully taken into account. It includes a number of different types of data processing in the system, the automatic operation and manual intervention combined management, and the speech signal processing and operations.