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我国是世界四大文明古国之一,我们的祖先有许多重大的科技发明,为世界文化的发展作出了卓越的贡献,指南车就是其中之一。指南车与指南针不同。指南针是利用天然磁体或人造磁体的指极性指示南北,属于地磁学的范围。指南车是利用大小齿轮互相传动的原理以保持指示器的原定方向,应属于机械学的范围。而且,指南车不一定指南,其原定方向可以依人的调整而改变,所以指南车又叫定向车。在我国许多古文献中,如《史记》、《古今
As one of the four ancient civilizations in the world, our ancestors have made many significant technological inventions and made outstanding contributions to the development of world culture. The guide car is one of them. The guide car is different from the compass. Compass is the use of natural or artificial magnets refers to the polar north and south, belonging to the scope of geomagnetism. Guide car is the use of the principle of large and small gears to each other to maintain the original direction of the indicator should belong to the scope of mechanics. Moreover, the guide car may not necessarily guide the original direction can be changed according to human adjustment, so the guide car is also called directional car. In many ancient Chinese literature, such as “Historical Records”, "ancient and modern