Analog optical rock dust meter

Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting Pub Date : 1988-10-02 DOI:10.1109/IAS.1988.25225

T. Woods, M. Sapko, H. Perlee

引用次数: 4

Abstract

The US Bureau of Mines previously constructed a portable meter based on optical reflectivity for measuring the concentration of rock dust in rock dust-coal dust mixtures. This early design was accurate to within +or-2 wt.% rock dust for mixtures whose rock dust concentration was between 30 wt.% and 100 wt.%. Below 30 wt.% rock dust, the meter exhibited poor accuracy. The Bureau researchers have redesigned the meter based on a theory for optical reflectivity of binary dust mixtures. This new meter was tested against both laboratory-prepared coal-dust-rock-dust mixtures and samples taken from various coal mines and found to be accurate to +or-2-wt.% rock dust from 0 wt.% to 100 wt.%. The meter also has a lower power consumption than the previous model (which translates into longer battery life between charges), has fewer internal and external adjustments, is lighter in weight and can be held comfortably in one hand. It can be readily field calibrated.<>

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模拟光学岩石粉尘计

此前，美国矿产局制作了一种基于光学反射率的便携式测量仪，用于测量岩尘-煤尘混合物中岩尘的浓度。对于岩石粉尘浓度在30 wt.%和100 wt.%之间的混合物，这种早期设计精确到+或2 wt.%的岩石粉尘。低于30 wt.%的岩石粉尘，仪表显示出较差的准确性。该局的研究人员根据二元粉尘混合物的光学反射率理论重新设计了该仪表。这种新仪器对实验室制备的煤尘-岩石-粉尘混合物和从各种煤矿采集的样品进行了测试，发现精度达到±2 wt。%岩石粉尘从0 wt.%到100 wt.%。与之前的型号相比，这款仪表的功耗更低(这意味着充电之间的电池寿命更长)，内部和外部调整更少，重量更轻，单手握起来更舒适。它可以很容易地现场校准

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting

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