【摘要】：采用理論數(shù)值分析和計(jì)算機(jī)蒙特卡洛光線追跡模擬相結(jié)合的方法,研究積分球在設(shè)計(jì)和操作中影響發(fā)射率測量精度的因素,包括積分球開口大小,積分球內(nèi)壁污損,參考樣本與待測樣本的發(fā)射率,主動(dòng)光源的功率等。研究結(jié)果表明:積分球探測口開口比例對(duì)發(fā)射率的測量無明顯影響,當(dāng)積分球內(nèi)壁污損時(shí)參考樣本和待測樣本發(fā)射率的值相差很大時(shí)測量結(jié)果會(huì)有偏差,積分球自身輻射使發(fā)射率測量值偏高。當(dāng)參考樣本與待測樣本發(fā)射率相差小于0.1,積分球在污損情況下發(fā)射率測量誤差小于等于4‰。潔凈情況下,入射光源功率大于100 W時(shí),積分球自身輻射對(duì)發(fā)射率的影響低于5‰。
[Abstract]:By using the method of theoretical numerical analysis and Monte Carlo ray tracing simulation, the factors that affect the accuracy of emissivity measurement in the design and operation of the integrated sphere are studied, including the size of the opening of the integral sphere and the fouling of the inner wall of the integral sphere. The emissivity of the reference sample and the sample to be tested, the power of the active light source, etc. The results show that there is no obvious effect on the emissivity measurement by the ratio of the probe opening to the integral sphere, and when the emissivity of the reference sample and the sample to be measured varies greatly when the inner wall of the integrated sphere is defaced, the measurement result will be deviated. The emissivity measurement value is higher because of the radiation of the integral sphere itself. When the emissivity difference between the reference sample and the sample to be tested is less than 0.1, the emissivity measurement error of the integrated sphere is less than 4 鈥，

本文編號(hào)：2338567