Portable electrometric apparatus for roadside analysis of automotive
exhaust emission
    1.
    发明授权
    Portable electrometric apparatus for roadside analysis of automotive exhaust emission 失效
    便携式电动仪器,用于汽车废气排放的路边分析

    公开(公告)号:US5831742A

    公开(公告)日:1998-11-03

    申请号:US659328

    申请日:1996-06-06

    IPC分类号: G01N21/78 G01J3/08

    CPC分类号: G01N21/783

    摘要: A method and apparatus for instantaneously measuring the level of carbon dioxide (and other gases) in automotive combustion exhaust analysis is provided in the form of a portable battery driven roadside diagnostic instrument in which the CO.sub.2 level is measured by a calorimetric technique utilizing light as the energy source and a piezoelectric bimorph to vibrate a single fiber-optic element to multiplex between two fiber-optic receptors delivering the light to a measurement cell and a reference cell. The measurement cell comprises a salt of an acid-base indicator dye which provides proportional color change on contact with CO.sub.2. The dye is supported on a polymetric film in the cell.

    摘要翻译: 以便携式电池驱动的路边诊断仪器的形式提供用于瞬时测量汽车燃烧排气分析中的二氧化碳(和其他气体)的水平的方法和装置,其中通过使用光作为测量的量热技术来测量CO 2水平 能量源和压电双压电晶片,以振动单个光纤元件以将两个光纤传感器之间的光纤传递到测量单元和参考单元。 测量单元包括酸碱指示剂染料的盐,其在与CO 2接触时提供成比例的颜色变化。 染料负载在电池中的聚甲醛膜上。