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Application on double audio frequency technology to data transmission in underground mine

LI Yang-ming,HAN Jiang-hong,JIN Hao(School of Computer and Information,Hefei University of Technology,Hefei 230009,China)  
Base on the requirements of the reliability and actual time for the control system in mine and other industrial production environments,the double audio frequency technology has been applied to long distance transmission of the lower speed rate signal in the high noise environment.The paper analyzed and proved the ability of the double audio frequency signal to resist the environment noises.With the special chip MT8888 of the double audio frequency,the signal transmission method was designed and applied with the double audio frequency technology.
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