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在实时在线激光衍射粒度测量中，观察窗玻璃上污染物对测量结果有直接影响，提出了可消除污染物影响的两次测量法。讨论了测量原理，并模拟现场颗粒状况用标准粒子进行了一系列实验，结果令人满意。
In real-time on-line laser diffraction particle size measurement, the observed window glass contaminants have a direct effect on the measurement results, and two measures are proposed to eliminate the influence of pollutants. A series of experiments were carried out with the principle of measurement and simulation of the particle condition in the field with satisfactory results.