The invention discloses a self-calibrating reference gas chamber, which comprises a housing, an incident optical fiber collimator and a photoelectric detector installed at both ends of the housing respectively; the incident optical fiber collimator is fixed at one end of the housing through a central mediation component, and both ends of the housing are sealed by sealed fillers; and an absorption cell cavity is formed between the incident optical fiber collimator and the photoelectric detector. The collimated light emitted by the incident optical fiber collimator passes through the cavity of the absorption cell and is converted into electrical signal by the photoelectric detector. The application improves the reliability of detection by using spectral gas absorption cell as optical fiber collimator-photoelectric detector to radiate optical path structure without adding auxiliary components such as lens and mirror; adjusts the optical fiber collimator through central mediation module to make the beam of radiation and the end of photoelectric detector concentric center, and then seals the two ends of the shell by sealing filler seal. The reference chamber has compact overall structure and low manufacturing cost, and is suitable for batch manufacturing.
【技术实现步骤摘要】
自校准的参考气室
本专利技术涉及一种自校准的参考气室。
技术介绍
在煤矿开采安全事故中,瓦斯事故一直是我国煤矿开采安全事故中最为重视的事故类型之一,为了实时监测甲烷气体含量,预防和控制瓦斯事故的发生,必须设置能在线实时快速检测甲烷气体浓度的仪器和设备。按照检测原理可将甲烷检测技术分为催化型、热导型、气敏半岛型、光干涉型和红外型。据安监总煤装(2017)18号文件《关于强化瓦斯治理有效遏制煤矿重特大事故的通知》第二条中规定:要积极推进安全监控系统升级改造,推广使用先进实用的红外、激光等甲烷传感器。近年来,随着基于可调谐半导体激光吸收光谱(Tunablediodelaserabsorptionspectroscopy,TDLAS)谐波检测技术的发展,激光甲烷检测逐渐成为痕量气体的重要检测手段。激光甲烷检测相较于传统检测方法,具有实时性好、寿命长、准确度高、无需经常标定等优点。在激光甲烷检测中,参考气室是激光甲烷传感器的重要组成部分,配合相应的信号处理方法,可实现激光光源谱线与甲烷吸收谱线的匹配自校准功能,提高传感系统长期运行的稳定性。自校准气室结构复杂,通常在壳体内设 ...
【技术保护点】
1.一种自校准的参考气室,其特征在于,包括壳体、分别安装在所述壳体的两端内的入射光纤准直器和光电探测器;所述入射光纤准直器通过中心调解组件固定在所述壳体的一端,壳体的两端通过密封填料密封;所述入射光纤准直器和光电探测器之间形成吸收池腔体;入射光纤准直器发射出的直准光通过吸收池腔体后由光电探测器转换成电信号。
【技术特征摘要】
1.一种自校准的参考气室,其特征在于,包括壳体、分别安装在所述壳体的两端内的入射光纤准直器和光电探测器;所述入射光纤准直器通过中心调解组件固定在所述壳体的一端,壳体的两端通过密封填料密封;所述入射光纤准直器和光电探测器之间形成吸收池腔体;入射光纤准直器发射出的直准光通过吸收池腔体后由光电探测器转换成电信号。2.根据权利要求1所述的自校准的参考气室,其特征在于,所述中心调解组件包括若干沿着所述壳体的周向分布的锁紧件,所述锁紧件穿过所述壳体与所述入射光纤准直器抵接。3.根据权利要求2所述的自校准的参考气室,其特征在于...
【专利技术属性】
技术研发人员:王尧,张书林,李军,龚仲强,于庆,孙世岭,樊荣,莫志刚,赵庆川,梁光清,张远征,
申请(专利权)人:中煤科工集团重庆研究院有限公司,
类型:发明
国别省市:重庆,50
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