摘要
冻土与未冻土中的介电常数和温度物理参数有一定的差异,且差异在数值上较明显。基于这一特性,提出了利用空气、固态土、水和冰物理特性存在差异的原理检测冻土的方法,设计了一种电容式冻土测量传感器,实现了土壤水分、地温及冻土深度多参数融合测量。通过与人工测量的冻土深度进行对比分析,结果表明:其相关系数达到了0.99,平均绝对误差小于2.5 cm,满足冻土自动测量技术要求,可应用于冻土观测站,代替人工观测。
There are some differences in dielectric constant and temperature of frozen soil and unfrozen soil physical parameters, and differences is obvious in value. Based on this feature, propose a method for frozen soil detection which takes use of the theory of physical properties difference of air, soil, water and ice, based on this, design a capacitive sensor which realize fusion measurement of multiple parameters on frozen soil, soil moisture, soil temperature and frozen soil depth. Through comparison and analysis, the result shows that correlation coefficient reaches 0.99, average absolute error is less than 2.5 cm, which meet the requirements of frozen soil auto measurement technology, and it can be applied to frozen soil observation station, instead of manual observation.
出处
《传感器与微系统》
CSCD
北大核心
2014年第1期89-91,96,共4页
Transducer and Microsystem Technologies
基金
公益性行业(气象)科研专项基金资助项目(GYHY201106042)
关键词
冻土
电容式传感器
土壤水分
frozen soil
capacitive sensor
soil moisture
