Embedded Circuit Development For Train Safety Control

Speeding trains, the strengthening of the transport density have made new demands of the safety and speed of the control and interlocking system. The new requirements may be achieved provided by the development of IC technology and digital technology . The traditional railway signal equipment is based on long experience accumulated to failure - security technology as the central of railway signal security technology, but electronic control system for railway signaling is dependent on the reliability theory and fault-tolerant technology, through fault avoidance and fault tolerance design of software and hardware, effectively improve the reliability of equipment to improve security. There is a wide range of design of Improving equipment reliability and safety , which need to address many of the issues.In this easy at home and abroad in recent years has also made great efforts, As far as possible to increase the maximum value of the security , reduce the risks and the probability of accidents to a minimum.There are two technology to improve train safety control,Paper used the avoid wrong technology and devices relegation to enhance the safety of a single control system. This will greatly reduce the complexity of the system, but also makes construction and maintenance of simple. Very professional engineers need to do ever,now an ordinary engineerswill is able to construct and maintenance. This at a large extent reduces the system cost of the development and practical application The main contents of papers are:1. Study of a highly reliable hardware platform. Use avoid failure hardware design technology to minimize the hardware system failure of a single point. At the same time, the expansion of the rich interface provides a number of safety requirements for higher applications. It can be integrated as a single system to constitute a redundant system in redundant hardware platform, such as double backup system, 2 X 2 redundant system.2.Transplanting real-time operating system Vxworks to the hardware platform, BSP development, driver development in order to manage of their hardware resources and resource scheduling.3. Preparation of the CAN bus test procedures to verify the rational of the hardware and software platform, at the same time to test the I / O functions . Major research of the paper is a highly reliable, high-security train control platform,which provides a wealth of software and hardware interfaces, for security control development and some expansion of redundancy control occasions. including the development of hardware platforms and software platform.Timely detection of equipment failure and a variety of effective treatment, greatly improving the safety of equipment failure. Can also be used as a single computer system in hardware redundancy system, which need high security requirements and cost being not sensitive occasions.