摘要
针对一种可以用于检测非金属制品在矿井下工作安全性的静电火花检测系统,研究了计算该系统中甲烷-空气引爆的最小点火能量的数学物理模型。并根据该检测系统的结构,提出了点火系统点火前后的电磁能量计算方法。通过计算系统点火前的电磁能量与最小点火能量,计算出检测样品被粉尘摩擦后的带电量,得出了点火能量耦合系数阈值与电荷阈值。结果表明,点火能量耦合系数阈值随电压升高而减小,随电极间距的增大而增大。以静电检测系统为例,当电极间距由1mm增大到5mm时,耦合阈值从0.416 3增加到0.769 1。同时,电荷阈值亦随电极间距增大而增大。研究结果可为进一步检测材料摩擦起电属性以及制定相关安全标准提供参考。
Testing non-metallic materials are of great value to mining industry.The MIE（Minimum Ignition Energy）characterize the danger of a kind of combustible gas and its ignition.We calculated the MIE of the ignition system which can be used to test the antistatic property of the mine using materials.According to the structure of the antistatic property testing system,a method to calculate the electromagnetic energy of the ignition system was presented,and according to the MIE and electromagnetic energy before ignition,the quantity of triboelectric charge was obtained,as well as the threshold value of ignition energy coupling coefficient and the threshold value of quantity of triboelectric charge.The results shows that the threshold value of ignition energy coupling coefficient decreases as voltage grows,grows as the electrode distance gets wider.Familiar to the variation of ignition energy coupling coefficient,the threshold value of quantity of triboelectric charge grows as the electrode distance gets wider.For the system described in this paper,the threshold increases from 0.416 3to 0.769 1when the distance increases from 1mm to 5mm.This study puts forward to the test way to non-metallic materials and provides reference to setting safty standard concerns.
出处
《高压物理学报》
CAS
CSCD
北大核心
2015年第5期392-400,共9页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金青年基金(51007096)
国家重点基础研究发展计划(2011CB209401)
关键词
最小点火能
点火能量耦合系数
火花点火
抗静电检测
MIE
ignition energy coupling coefficient
spark ignition
antistatic property testing
