Theory And Application Study For Automatic Measurement Of Ice-Layer Thickness Based On Capacitance Difference

Under the influence of global warming, in recent years, glacier of polar and inland plateaus have been melting more severely, which greatly effect living environment of people, the glowing of animal and vegetable and global climate. In research of ice science and other fields, ice-layer thickness of polar and plateau glacier is getting attention. In addition, resident life, water transport, offshore oil drilling platform and local climate are affected by frozen situation in various degree in northern aero of China. Especially in 2007, due to unusual icy weather of sleet, there were large-scale frozen disaster, traffic jam, collapses of electricity facilities, which severely damage normal life of people and development of society.For more and more serious glacier melting and icy calamity, our subject proposes a method and means to automatically monitor thickness of ice-layer based in capacitance difference of air, ice and water. The paper would systematically introduce the theory, method and how to realize. Firstly, the purpose and meaning is disserted with current measurement technologies of ice-layer thickness in the world and content ot our subject. Then beginning from the theory of capacitance difference between air, ice and water, I made capacitance model, did plenty of capacitance experiences and attained lots of experience data. After many experience improvement and adjustment, I finally make sure the feasibility and reliability of the method.In the paper, based in analysis and discussion of several measuring circuit of capacitance, a circuit to measure impedance with AC is certain to be used for measurement of ice-lay thickness. The theory, component and realization would be expressed.In the paper, the automatic system for monitoring ice-layer thickness on the basis of MSP430 is designed, including MCU circuit, capacitance and temperature measuring circuits, storage circuit, communication circuit of data etc. The system has the advantages of low-cost, multi-function and high precision.