井下粉尘统计参数对粉尘检测的影响

引入归一化粒度分布函数ｆ（ｒ）来描述井下粉尘的统计分布，运用光学理论和统计方法研究了由ｆ（ｒ）决定的统计参数对透射光损耗和散射光的影响，进而得出了ｆ（ｒ）对粉尘检测结果影响的一般数学模型。分析表明，靠散射光与透射损耗无法独立提取ｆ（ｒ）的信息，只有衍射光，其场分布与ｆ（ｒ）有一一对应的关系．此结果为建立新的粉尘检测方法、研制高精度的井下粉尘传感器提供了理论依据。

THE EFFECT OF COAL MINE DUST PARAMETERS ON DUST DETECTION

The normalized particle size distribution function f(r)is used to describe the statistical distribution of underground dust and optical theory and statistical method is applied to study the effect of statistic parameters determined by f(r)on light transmittive losses and scattering. A general mathematical model is built for the effect of f(r) on dust detection. The investigation shows that information of f(r)can not be obtained from scattering and transmittive losses. Only diffraction light and diffraction field distribution will represent the corresponding relations with f(r). The results provide a theoretical fundation for a brand new dust detection method which will lead to development of a high-precision dust sensor.