介绍了由GPS接收器、工控机和音频输出设备组成的公交车自动报站系统的功能、组成原理和关键技术，阐述了系统主要的硬件和软件设计方法。
The thesis analyses the function, the principles of composing and the key technology of GPS based buses'auto-announce system, also the hardware design and the software design are presented.
该系统实现了公交车自动语音和LED屏报站，可通报公交车运行状态和到站时间。
The system features automatic speech and LED screen, capable of informing the running state of the bus to the people waiting for the bus and reporting the arriving time of the bus.
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