CAJ | 학술논문

提出了一种利用光学衰减片与电机组合，扩展透射式能见度仪动态范围的方法。通过改变加载到L ED光源的调制信号的幅度，控制L ED光源的发射光强；设计测量系统，选择固定透过率的衰减片；设置合理的系统阈值完成数据测量。对测量数据作拟合分析，结果表明：采用透过率为60％的中性密度衰减片，系统动态范围扩展了0．6倍；透过率为12％时，系统动态范围扩展了6．9倍。同时，通过选择不同透过率的中性密度衰减片，可实现系统动态范围的灵活扩展。
제출료일충이용광학쇠감편여전궤조합，확전투사식능견도의동태범위적방법。통과개변가재도L ED광원적조제신호적폭도，공제L ED광원적발사광강；설계측량계통，선택고정투과솔적쇠감편；설치합리적계통역치완성수거측량。대측량수거작의합분석，결과표명：채용투과솔위60％적중성밀도쇠감편，계통동태범위확전료0．6배；투과솔위12％시，계통동태범위확전료6．9배。동시，통과선택불동투과솔적중성밀도쇠감편，가실현계통동태범위적령활확전。
A method to extend the dynamic range of transmittance meter with a combination of optical attenuator and motor was introduced .In this system ,the emission intensity of the LED was controlled by the variation amplitude of modulation signal which was loaded .Further-more ,we selected fixed transmittance attenuator and established the reasonable threshold when the data measurement was carried on .According to fitting analysis of data ,the result shows that the system's dynamic range is extended 0 .6 times ,when using neutral density at-tenuator whose transmittance is 40% .And it is extended 6 .3 times when the transmittance is 87% .Meanwhile , by choosing neutral density attenuator of different transmittance , the system's dynamic range can be flexibly extended .