NEAR-INFRARED MEASUREMENT OF SURFACE MOISTURE ON POROUS MATERIALS

被引：1
|
作者：
Gong, L. [1 ]
Plumb, O. A. [1 ]
Lee, W. C. [1 ]
机构：
[1] Washington State Univ, Dept Mech & Mat Engn, Pullman, WA 99164 USA
来源：
EXPERIMENTAL HEAT TRANSFER | 1993年 / 6卷 / 03期
关键词：
D O I：
10.1080/08916159308946461
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An instrument using the near-infrared reflectance technique was designed 10 measure surface moisture on porous materials. The basic instrument design consists of a radiation source, a lens system, narrow-band interference filters, a detector, and a data acquisition system. The instrument junction, operation, and calibration are discussed in detail. The modified Kubelka-Munk junction is used for the data transformation. The experimental data from glass beads of 65, 120, and 450 mu m in diameter show that a two-point linear model can be utilized for calibration. The instrument uncertainty is estimated to be less than +/- 6.2%.
引用
收藏
页码：299 / 314
页数：16
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