Three-level distributed analysis method based on inductive coupling temperature-salinity-depth sensor chain transmission channel

Abstract

The invention discloses a three-level distributed analysis method based on an inductive coupling temperature-salinity-depth sensor chain transmission channel. The inductive coupling temperature-salinity-depth sensor chain transmission channel is taken as a prototype, and channel transmission characteristics of an inductive coupling temperature-salinity-depth sensor chain are evaluated relatively accurately through adoption of the three-level distributed analysis method. A magnetic coupling model of an overwater magnetic ring, a steel cable and water body and a magnetic induction model of the steel cable, the water body and an underwater magnetic ring are established according to the channel characteristic of the inductive coupling temperature-salinity-depth sensor chain. Values of magneticring inductive reactance and water body impedance in a marine environment are calculated through adoption of COMSOL Multiphysics software. Through establishment of a complete circuit model, the transmission characteristics of a transmission signal in the channel are analyzed as the investigation depth is increased. According to a result, through simulation analysis of a transmission channel model, the current distribution in the water body is mainly concentrated in a circular region in a certain range by taking the steel cable as a center, as the length of the steel cable is increased, the length of the water body is increased, a signal is attenuated to 2.9%; and as an inductance value is changed, the signal is attenuated to 1.5%; and as the load quantity is changed, the signal is attenuated to under 2.6%. According to a conclusion, the signal transmission performance is greatly influenced by the increase of the water resistance, the underwater magnetic ring inductive reactance and the load quantity, a water body resistor impedance value is reduced, and the stable inductance value change has very important effect on the improvement of the channel transmission performance of the inductive coupling temperature-salinity-depth sensor chain.

Description

Technical field [0001] The present invention uses the transmission channel of the inductively coupled thermohaline deep chain as a prototype, and proposes to use a three-level distributed analysis method to study the channel characteristics of the inductively coupled marine communication system, and provides a new method for the research of inductively coupled transmission channels, which is useful for improving the The transmission rate and reliability of the channel signal are of great significance. Background technique [0002] Inductive coupling transmission communication technology, as one of the important technologies for ocean surveying, uses the principle of electromagnetic induction to realize non-contact underwater signal transmission. It has the characteristics of simple structure, low cost and long transmission distance, and the sensor can be deployed to a deep Of the sea. The use of non-contact electromagnetic induction for data transmission is an effective, economi...

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But its transmission rate is not high, only up to 4.8Kbps

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