YASKAWAJB4A0011(43P7)瓦玉集糅

易卖工控网（www.ymgk.com）提供”YASKAWAJB4A0011(43P7)瓦玉集糅”，产品详情：品牌/厂家：YASKAWA、型号：JB4A0011(43P7)、成色：全新、货期：现货 1天内发货、保修：365天，更多产品详情就上易卖工控网。

    工作原理
    本设计的核心思想是利用线圈发射/接收低频语音信号。其次是监控红绿灯自动转换导盲器所发出的语音提示信号。下面结合电路原理图(见图1)说明整个设计的工作原理。Audio1与Audio2为语音芯片，分别存储了“绿灯，可以通行！”与“红灯，禁止通行！”语音信号，通过继电器选择送入功放模块进行放大，然后直接送入发射线圈进行低频语音信号发射。接收线圈接收到音频信号后，利用运放芯片和功放对信号进行放大，驱动扬声器发声。

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