The invention relates to a photoacoustic spectrum measuring technique, in particular to a full optical gas detection method and device based on the Michelson interference principle. The utility model solves the technical problems that the photoacoustic spectrum technique is sensitive to the external electromagnetic environment when measuring the concentration of the gas. A method for detecting the optical gas based on Michelson interference principle, including gas tuning fork quartz crystal resonance method based on Michelson; also includes all optical detection methods: the introduction of a probe beam, which can be decomposed into two beams, the outer side of an arbitrary beam incident to the tuning fork quartz crystal of a rallying, reflection with another beam of light Michelson interferometer, produce fringes of equal thickness; collection of one or more lines with light intensity changes in the fixed vibration rallying receiving surface generated by the amount, get the concentration of the gas to be detected according to the variation of light intensity. The measuring accuracy of the invention is very high, the interference of the electromagnetic environment is effectively avoided, and the advantages of the Michelson interference principle are fully brought into play.
【技术实现步骤摘要】
【专利摘要】本专利技术涉及光声光谱测量技术,具体为一种基于迈克尔逊干涉原理的全光学气体探测方法及装置。解决了目前光声光谱技术测定气体浓度时容易受外界电磁环境干扰的技术问题。一种基于迈克尔逊干涉原理的全光学气体探测方法,包括基于音叉式石英晶振的气体共振发生方法;还包括迈克尔逊全光学探测方法:引入一束探测光,将其分解为两束,一束入射至音叉式石英晶振的任意一个振臂的外侧面,发生反射后与另一束光发生迈克尔逊干涉,产生等厚干涉条纹;采集一条或多条亮纹随振臂振动而在该固定接收面所产生的光强变化量,根据该光强变化量得到待测气体的浓度。本专利技术测量精度非常高,有效避免了电磁环境的干扰,充分发挥了迈克尔逊干涉原理的优点。【专利说明】基于迈克尔逊干涉原理的全光学气体探测方法及装置
本专利技术涉及光声光谱测量技术,具体为一种基于迈克尔逊干涉原理的全光学气体探测方法及装置。
技术介绍
随着科学技术以及经济社会的不断发展,环境问题也日益凸显,无论出于工业生产监控还是人们健康生活,对气体质量的监测正变得越来越重要,相关研究人员也一直为此进行着不懈的努力。激光光声光谱技术便是发展较为 ...
【技术保护点】
一种基于迈克尔逊干涉原理的全光学气体探测方法,包括基于音叉式石英晶振的气体共振发生方法;其特征在于,还包括迈克尔逊全光学探测方法;所述迈克尔逊全光学探测方法采用以下步骤:引入一束探测光,将其分解为两束,一束入射至音叉式石英晶振的任意一个振臂的外侧面,发生反射后与另一束光发生迈克尔逊干涉,产生等厚干涉条纹;通过采用与等厚干涉条纹相配合的条纹状光阑使一条或多条亮纹透射至一个固定接收面而将其余部分遮挡,采集一条或多条亮纹随振臂振动而在该固定接收面所产生的光强变化量,根据该光强变化量得到待测气体的浓度;所述一条或多条亮纹的光强变化量ΔI=I大-I小,式中I大、I小分别是采集到的一条 ...
【技术特征摘要】
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