说明：  本系统将STC89C54RD单片机用作主控制器。当GPS采集的位置坐标达到存储的预置坐标信息的范围内，主控制器将语音信息从语音芯片中读取出来，并转换成要输出的语音信号，再通过语音电路模块输出来实现语音的播报。与此同时，主控制芯片对程序里的文字信息来进行读取，再结合LCD显示模块显示其站点信息。通过位GPS采集的速度
(Stc89c54RD is used as the main controller in this system. When the position coordinates collected by GPS reach the range of the stored preset coordinate information, the main controller reads the voice information from the voice chip, converts it into the voice signal to be output, and then outputs it through the voice circuit module to realize the voice broadcast. At the same time, the main control chip reads the text information in the program, and displays the site information combined with the LCD display module. The speed collected by bit GPS is converted to calculate the moving speed, and then compared with the preset upper speed. When the actual speed is greater than the preset speed, the MCU controls the voice chip to)