CAJ | 학술논문

在土壤冻融过程实验中，通过对空气、水、冰及干土的介电特性进行分析研究，发现了土壤中水和冰发生相变引起土壤总的电容发生很大变化，基于这一特性和LC振荡电路频率响应的原理，设计了一种基于平面电容分层检测冻土的传感器，实现了土壤冻融状态的判别和冻土深度的自动测量。与人工观测进行对比实验证明，当土壤中未冻水含量相对变化率在0.3以上时，土壤已经冻结。因此，利用基于平面电容的冻土检测传感器检测土壤的冻结状态，实现冻土深度自动化测量是可行的。
재토양동융과정실험중，통과대공기、수、빙급간토적개전특성진행분석연구，발현료토양중수화빙발생상변인기토양총적전용발생흔대변화，기우저일특성화LC진탕전로빈솔향응적원리，설계료일충기우평면전용분층검측동토적전감기，실현료토양동융상태적판별화동토심도적자동측량。여인공관측진행대비실험증명，당토양중미동수함량상대변화솔재0.3이상시，토양이경동결。인차，이용기우평면전용적동토검측전감기검측토양적동결상태，실현동토심도자동화측량시가행적。
In the experiment of soil freezing and thawing process,through the analysis and study of air,water,ice and dry soil dielectric properties,it is found that the phase change of water and ice in soil results in the change of soil total capacitance. Based on this characteristic and the frequency response principle of the LC oscillation circuit,a planar capacitance based sen?sor for frozen soil layered detection was designed,which realized the discrimination of soil freezing/thawing states and automatic measurement of frozen soil depth. The experiment result from comparison with that of artificial observation proves that when the relative change rate of the unfrozen water content in soil is more than 0.3,the soil has been frozen. Therefore,it is feasible for frozen soil detection sensor based on planar capacitance to detect the freezing/thawing state of soil,and achieve the depth mea?surement of frozen soil.