论文信息 - NEAR-INFRARED MEASUREMENT OF SURFACE MOISTURE ON POROUS MATERIALS

NEAR-INFRARED MEASUREMENT OF SURFACE MOISTURE ON POROUS MATERIALS

An instrument using the near-infrared reflectance technique was designed to 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 function, operation, and calibration are discussed in detail. The modified Kubelka-Munk function is used for the data transformation. The experimental data from glass beads of 65, 120, and 450 μm 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%.

O. Plumb | L. Gong | W. C. Lee

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