基于超导量子干涉仪的便携式透地通信系统研究

Research on the Portable Through-the-Earth Communication System Based on SQUID

矿井透地通信被认为是矿井灾害时最可靠、最灵活的通信手段,而SQUID在实现矿井透地通信方面具有优越性。根据SQUID的应用特点,研究和设计了基于SQUID的便携式透地语音通信系统;分析了低频信号矿井环境下的透地传播理论,建立了系统磁通密度和信号幅度与渗透深度间的关系,最后进行了仿真实验,仿真表明系统选用4 kHz中心频率调制的正弦波、用QAM16作为编码协议、以2000 bit/s的速率传送,在65 m深处得到的磁场功率谱散布不大,证明了系统的可行性。

A through- the -earth communication system is con- sidered as the most reliable and flexible means when the disasters happen in mine. According to the application characteristics of SQUID, the portable through -the -earth voice communication system based on SQUID was researched and designed. The through - the - earth propagation theory of low frequency signal in mine was analyzed, and the relationship between magnetic flux density and penetration depth was established. Finally, it was proved by simulation experiment that the effect of dispersion is not too big when the signal of system is a modulated sine wave with 4 kHz central frequency transmitting 2000 bits/s using QAM16 as the encoding protocol and the system designed is feasible.