大气电场仪用于风沙电场测量的可能性分析  

Possibility Analysis of Atmospheric Electric Field Mill Used in Wind-blown Sand Electric Field

作　　者：杜全忠[1] 李兴财[1,2] 

机构地区：[1]宁夏大学物理电气信息学院,宁夏银川750021 [2]宁夏大学宁夏沙漠信息智能感知重点实验室,宁夏银川750021

出　　处：《实验室研究与探索》2015年第4期8-12,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金(No.11302111);国家科技部国际合作项目(2011DFA11780);宁夏科技支撑计划宁陕合作项目;西部灾害与环境力学教育部重点实验室(兰州大学)开放基金(Klmwde201009)资助项目

摘　　要：总结归纳了风沙电现象研究领域常用的测量仪器及其基本原理,并对现有仪器直接应用于风沙电现象研究所可能产生的问题进行了理论分析。结果表明:由于大气电学仪器感知电场强度与环境介电常数相关,且这类仪器通常是在无沙环境下进行仪器参数的标定,但是将其用于风沙环境时,实验仪器测量所处的环境介电常数发生显著改变,从而导致无沙环境下的标定关系失效,致使无法获得准确的环境电场信息。同时,针对这一问题给出了相关改进的措施,并分析了风沙电现象实验研究仍存在的一些问题。Because of its serious effect in sand＇s jump, sports, transport processes, as well as the power lines, radio signals, the wind-blown sand electricity phenomenon has got an increasing attention by the many scientific workers. In recent years, many scholars have made a large amount of experimental researches. However, the existed experimental instruments are directly selected from the atmospheric electrical measuring research, there is no any literature to discuss the reliability and the accuracy of those equipments when they are used in lhe wind-bluwn sand environment. Therefore, the paper summarizes the commonly used instruments in the research field of wind-sand electricity phenomenon, as well as its design principle, and discusses the potential problems while they are used in wind-sand environment. The lheoretical resnhs show that the measurement results of those instruments are directly related to the dielectric constant of the experimental environment. When they are used in the wind-blown sand or the sandstorm, the environment permillivily has changed, the calibrated instrument paramelers obtained in the clean environment （no-sand） may be failure, it is impossible to obtain accurate results. At the same time, in order to solve this problem, the paper also gives a relevant improving method and analyzes some problems still existed in the experimental study on the subject.

关 键 词：风沙电 测量仪器 电场 电荷量 

分 类 号：O441[理学—电磁学] TH765[理学—物理]