The objective was to develop an instrument which would remotely measure the CO, HC and NO emission from vehicles. The basic operation of the instrument developed is based on the selective infrared absorption by pollutant species in the rear wake of a vehicle as it is driven through an infrared beam which spans the roadway. The entire measurement sequence is performed automatically. The instrument measures CO and HC emission concentrations at low drive-through speeds, being limited by unexpected spreading of the infrared beam by non-isothermal wake turbulence which creates a false absorption signal. This false absorption signal becomes unacceptably large at velocities greater than 20 mph. Development problems encountered preclude the reliable measurement of NO emissions.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    VEHICLE INSTRUMENTATION

    SUZUKAWA YUKI / TAKAKUWA DAI | Europäisches Patentamt | 2019

    Freier Zugriff

    PIGS' INNOVATIVE INSTRUMENTATION LOWERS PIPELINE INSPECTION COSTS

    Russell, D. / Smith, G. H. | British Library Online Contents | 2004


    Ultrasonic instrumentation and transducers for rail inspection

    Small, J. / Brook, C. | Tema Archiv | 2002


    Pigs' innovative instrumentation lowers pipeline inspection costs

    Russell, David / Smith, George H. | Tema Archiv | 2004


    Intelligent instrumentation for reliable inspection of offshore installations

    Stirling, G. / Hayward, G. / Pearson, J. | Tema Archiv | 1990