Key words: embedded controller; Construction machinery; control

Chinese Library Classification number :TP391 Document code :A Paper number :1009-3044(2010)05-1227-02

350-805595-208 ACC-5595-208 embedded system has a wide range of applications in manufacturing, industrial control. At present, embedded control systems in industrial control are developing towards high speed, high integration and low power consumption. Research on embedded control system is of great significance for improving industrial control quality star and production efficiency.

1. Characteristics and structure of embedded system

350-805595-208 ACC-5595-208 embedded technology is widely used in consumer electronics, communications, automotive, defense, aerospace, industrial control, instrumentation and office automation. In the personal sphere, embedded products will be primarily for personal use, as data processing and communication software for personal mobility. For enterprise special solutions such as logistics management, bar code scanning, mobile information collection, small handheld embedded system will play a huge role. Embedded system can not only be used in ATM, vending machine, industrial control and other special equipment, but also combined with mobile communication equipment, GPS, entertainment 。

Other microprocessors, such as the ARM SA-1100 series, are ideal for portable communications and consumer electronics and have been successfully used in several companies’ line of handheld computers. PXA270 is used in high-end mobile devices to improve the information processing capability of their media through complex instruction sets. In general, the embedded control system has the following characteristics: small kernel, strong specificity, simple system, high real-time multi-task operation and special development tools and environment.

350-805595-208 ACC-5595-208 embedded system has the basic elements and characteristics of “embeddedness”, “specificity” and “computer” [2]. It is generally composed of embedded processor, hardware device, embedded operating system and user application program, which is used to control, monitor or manage other devices. Their structure diagram can be summarized in Figure 1.

2. Design process of embedded control system

From the composition of embedded control system, we know that the design of embedded control system mainly considers hardware design and operating system design.