基于编码芯片PT2262实现的交叉路口语音提示装置

The Voice Prompts Device at the Crossroads Based on Chip of PT2262 Encoder

分析了编码芯片PT2262的软件解码,以及利用软件解码设计的交叉路口语音提示装置硬件电路.软件解码中,同步码及解码结果的有效确认避免了系统误判.本设计可以对交叉路口的红绿灯准确识别,发出语音提示,且包含简单的定位信息.系统识别率为100%,工作距离可达70 m,抗干扰能力强,实验验证可行.

This paper intruduces the software decoder of PT2262 and the hardware circuit of the voice prompts device at the crossroads.The congfirmation of the synchronous code and decoding results effectively avoids misjudgment.The design can accurately recognize the traffic lights at the crossroad,then it makes the prompted sound,including the simple location＇s information.With the ability of resistance to the undesired signal,this system has the high recognition rate（100%） and long working distance（70 m）.The experiment demonstrates the advantages of the proposed device.