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    • 3. 发明授权
    • System for measuring gases dissolved in a liquid
    • 用于测量溶解在液体中的气体的系统
    • US6037592A
    • 2000-03-14
    • US800678
    • 1997-02-14
    • Steven S. SunshineDavid C. BlivenJohn Seymour Mattis
    • Steven S. SunshineDavid C. BlivenJohn Seymour Mattis
    • G01N21/35G01N33/28
    • G01N33/2841G01N21/3504
    • A method and apparatus for continuously monitoring and measuring the concentration of gases in a gas-containing liquid such as a transformer oil. The method and apparatus employ a passive gas extraction technique which comprises a high performance membrane material to extract dissolved gases from the oil, and an IR-based sensor to detect gases present. The passive gas extractor extracts dissolved gas from the gas-containing liquid, there being a known relationship between the concentration of a constituent gas in the extracted gas and the concentration of the constituent gas remaining dissolved in the gas-containing liquid. The gas sensor senses the concentration of a constituent gas in the extracted gas, in the presence of other constituent gases. The gas sensor comprises a sample chamber which receives the extracted gas, a non-dispersive infrared (IR) absorption sensing system which generates an electrical signal corresponding to the light absorption, at one or more specified IR wavelengths, of the extracted gas in the chamber, and an electrical output comprising the electrical signal generated by the non-dispersive IR absorption sensing system. A processor having receives the electrical signal corresponding to the light absorption, at the one or more specified IR wavelengths, of the extracted gas in the chamber, and computes the concentration of at least one gas constituent present in the extracted gas.
    • 一种连续监测和测量变压器油等含气液体中的气体浓度的方法和装置。 该方法和装置采用被动气体提取技术,其包括从油中提取溶解气体的高性能膜材料,以及用于检测存在的气体的基于IR的传感器。 无源气体提取器从含气体的液体中提取溶解气体,提取气体中的构成气体的浓度与剩余的溶解在含气体液体中的构成气体的浓度之间存在已知的关系。 气体传感器在存在其他构成气体的情况下,检测提取气中的构成气体的浓度。 气体传感器包括接收提取气体的样品室,非分散红外(IR)吸收感测系统,其在一个或多个指定的IR波长处产生对应于腔室中提取的气体的光吸收的电信号 以及包括由非分散IR吸收感测系统产生的电信号的电输出。 接收对应于室内提取气体的一个或多个指定IR波长处的光吸收的电信号的处理器,并计算提取气体中存在的至少一种气体成分的浓度。