磁致位移传感器冰雪厚度测量仪原理及其应用

Principle and application of apparatus for monitoring ice/snow thickness based on a magnetostrictive displacement sensor

基于磁致伸缩原理的位移传感器具有高精度、高稳定性、多位置测量的特点,据此研制了一种能同时测量冰/雪表面和冰底面变化的接触式冰雪厚度测量仪.该仪器被应用到低温实验室冰厚和南极固定冰区冰雪厚度的测量中.实验室历时540h,测量精度±0.13cm;现场应用持续6个月,测量精度±0.20cm.高精度的测量数据,特别是现场测量数据,为分析冰厚变化的细微过程提供了基础,为深入研究气-冰-海耦合过程,完善海冰热力学数值模型提供了支持.另外,该仪器还能为冰工程领域的研究提供技术支持.

Magnetostrictive displacement sensor has characteristics of high precision,high reliability and multi-position detecting. Based on the principle of this sensor,a new apparatus for monitoring ice/snow thickness and ice foundation variation was developed. This apparatus was used to measure ice thickness in freezing laboratory for about 540 h and landfast-sea-ice thickness and snow depth in Antarctica for about 6 months. Precision estimation indicates that the error of the apparatus is ±0.13 cm in laboratory and ±0.20 cm in field,respectively. The data,especially for the field data,with high precision,can give a powerful support to analyze the process of ice growth and decay in a short-temporal scale,and to thoroughly understand the couple interaction processes among atmosphere,ice and ocean,furthermore,to modify ice thermodynamic numerical model. In addition,this apparatus will supply technical support for ice engineering research.