关键词：汽车；智能汽车；电磁技术；路径定位
摘 要：Introduce Fressscale MC9S12XS256 as the core control unit of the self-tracing smart car system.Fast and accurate information extracting and processing is the guarantee of the sensitive smart car quickly moving along the track.To the smart car system based on electromagnetic technology,create one method of path position detection and its technology details.Tests show this method can be good at forward-looking,real-time and accuracy.