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首页> 外文期刊>Defence Science Journal >Relay-based Coupling Scheme of High Speed Communication Data, High Voltage DC and High Power Pulsed AC for Coaxial Cable
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Relay-based Coupling Scheme of High Speed Communication Data, High Voltage DC and High Power Pulsed AC for Coaxial Cable

机译：同轴电缆高速通信数据，高压直流电和大功率脉冲交流电的基于中继的耦合方案

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Coaxial cable telemetry is most commonly used in the field of underwater applications like data logging in oil rigs, underwater wireless modem, underwater acoustic measurements, borehole measurements, deep sea telemetry for sediment analysis, airborne sonars, imaging sonars. In all the above applications coaxial multicore cables are used. The design and development of relay based coupling scheme which helps to replace the multi-core cable with a single core coaxial cable for telemetry application is described. Single core cable is suitable for long distance data communication. Multi core cables are generally heavy and due to the size, may not meet space constraints in complex systems. They are not economical too. The relay based coupling scheme is used to mix or separate the high speed bi-directional communication data, high voltage DC and high power pulsed AC. In single relay scheme one relay is used to switch the centre core of single core coaxial cable. Here the ground is common for both high power AC transmission and high speed bi-directional data path. A dual relay scheme is discussed where two relays are used to switch both the centre core and ground of the single core coaxial cable. This provides more ground isolation and can avoid ground lifting issues while high power AC transmission occurs. The simulation of the coupling scheme was done using PSpice (R). A prototype of the coupling scheme was also made for analysis. Filter responses were analysed for each coupling path. The DC coupling filter has 85 Hz cut-off frequency at -3 dB. The cut-off frequency of high speed data coupler is 500 KHz at -3 dB. A 4.3 KV peak to peak of 3 KHz and 7 KHz AC signals were transmitted and measurements were taken to analyse the effect of high voltage over different coupling paths. The 3 KHz signal has a peak of 61.88 dB and that of 7 KHz signal, the peak is 62.50 dB. The signal components of 3 KHz signal in the DC path has a voltage level of 9.375 dB and that of 7 KHz signal is 25.63 dB.
机译：同轴电缆遥测最常用于水下应用领域，例如石油钻井平台中的数据记录，水下无线调制解调器，水下声学测量，钻孔测量，用于沉积物分析的深海遥测，机载声纳，成像声纳。在以上所有应用中，均使用同轴多芯电缆。描述了基于继电器的耦合方案的设计和开发，该方案有助于在遥测应用中用单芯同轴电缆代替多芯电缆。单芯电缆适用于长距离数据通信。多芯电缆通常较重，并且由于尺寸原因，可能无法满足复杂系统中的空间限制。它们也不经济。基于继电器的耦合方案用于混合或分离高速双向通信数据​​，高压直流电和大功率脉冲交流电。在单继电器方案中，使用一个继电器来切换单芯同轴电缆的中心芯。在这里，大功率交流传输和高速双向数据路径的公共接地。讨论了双继电器方案，其中使用两个继电器同时切换单芯同轴电缆的中心芯线和接地线。这样可以提供更多的接地隔离，并且可以避免在发生大功率交流电传输时发生接地提升问题。耦合方案的仿真是使用PSpice（R）完成的。还制作了耦合方案的原型进行分析。分析每个耦合路径的滤波器响应。直流耦合滤波器的-3 Hz截止频率为85 Hz。高速数据耦合器的截止频率为-3 dB时的500 KHz。传输了3KHz和7KHz交流信号的4.3 KV峰峰值，并进行了测量以分析高压在不同耦合路径上的影响。 3 KHz信号的峰值为61.88 dB，7 KHz信号的峰值为62.50 dB。直流路径中3 KHz信号的信号分量的电压电平为9.375 dB，而7 KHz信号的信号分量的电压电平为25.63 dB。

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