磁致位移传感器冰雪厚度测量仪原理及其应用

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.

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

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.