| The electric energy conversion technology is one that refers to converting and transmitting eletronic energy.It can supply power source by accurate control and high efficiency processing for modern communica-tion,eletronic instruments,computers and industrial automation.So it is not on-ly an andvanced technology but also a base for many progressive technologi-es. It has been one of the most widely used and the most popular technologies when we step into 21century.In China,for some reasons we are less advanced in this aspect compared with other developed countries,although we always place much importance on it.Due to this,we still have a wide place to develop and improve this technology.The power supply of high precision, high stability and high automation is needed during the course of regulating some instruments of vehicle. The traditional ways have many shortcomings. So this paper will make a research for high precesion and programable power supply, applying embedded technology. The design is completed which uses LPC2119 as main controller combined with CAN bus andμC/OS-Ⅱ. As follows:First, this paper illustrates the importance of embedded technology, field-bus technology to instrument industries. And then the background, significance and aims of it are explained. Furtherly, this paper puts realization on plans and technical routes of the topic.Secondly,the ways of constructing hardware are compared and the reasons that some ways are selected are illustrated.thirdly,hardware of the system are designed. The hardware is completed by selecting the microprocessor chip LPC2119 and some of embedded hardware platforms which have to use peripheral equipments.And then,in Chapter 4 and 5 constructing software is expounded.It mainly includes device drivers development as well as how to prepare forμC/OS-Ⅱrunning.At last,the experimental results show the real-time, stability and safety of direct voltage and current will be greatly improved by the application of real-time multi-tasks Operating System and other modules. |
