抛弃式盐温深剖面仪信号传输动态分析

Dynamic Analysis of XCTD Profiler Signal Transmission

提出了一种动态分析抛弃式盐温深剖面仪(XCTD)有线信道对传输信号幅值和相位影响的方法。推导出各电路参数随信道长度变化的规律,建立简化的传输电路模型和该模型的传输函数。通过定性分析得出传输频率,分布电容和缠绕电感对信号相位的影响。并利用MATLAB软件分析XCTD在动态放线过程中信道对信号幅值和相位的影响,以及其影响的原因。可以进一步指导XCTD测量系统的电路设计,提高测量数据的精度和信号传输的稳定性。

A dynamic analysis method was presented about the effect of XCTD （Expendable Conductivity, Temperature and Depth） Profiler＇s channel on the transmission signal amplitude and phase. The rule of the parameter change of each circuit with the channel length change was derived in this paper. Meanwhile, the simplified transmission circuit model and its transfer function were established. The various parameters including the transmission frequency, distributed capacitance and winding inductance were analyzed and discussed, then their influences on signal phase were obtained through a series of qualitative analyses. Finally, how the XCTD cable influences the signal amplitude and phase and the reason of the influence were analyzed with the MATLAB software. The findings can further guide the circuit design of the XCTD measuring system, thus improving the accuracy of the measurements and the stability of signal transmission.