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    • 3. 发明授权
    • Apparatus for remote analysis of vehicle emissions
    • 远程分析车辆排放的装置
    • US5210702A
    • 1993-05-11
    • US633952
    • 1990-12-26
    • Gary BishopDonald H. Stedman
    • Gary BishopDonald H. Stedman
    • G01N21/33G01N21/35
    • G01N21/33G01N21/3504G01N2021/1793
    • A gas analysis device for the remote detecting, measuring and recording of NO.sub.x, CO, CO.sub.2, HC and H.sub.2 O levels from the exhaust of moving motor vehicles. It utilizes a source of collimated infrared and ultraviolet radiation and includes a mechanism for receiving and measuring the infrared and ultraviolet radiation from its source, and another mechanism for measuring background infrared and ultraviolet radiation levels in the ambient atmosphere. The receiving mechanism splits the combined infrared and ultraviolet radiation into separate infrared and ultraviolet beams. A mechanism receives the separate ultraviolet beam and generates a signal indicative of NO.sub.x. Another mechanism splits the infrared beam into two to four components, and devices are positioned for receiving each of the infrared components and generating two to four signals indicative of, for example, CO, CO.sub.2, HC and H.sub.2 O. Another associated mechanism then computes and produces signals indicative of the amount of CO, CO.sub.2, HC, NO.sub.x and H.sub.2 O in the path of the infrared and ultraviolet radiation from the source, thereby making it capable of measuring emissions of vehicles. The source and the receiving mechanism are aligned on opposite sides of a roadway, both being at the elevation of the to-be-measured vehicle exhaust. Vehicles traveling on that roadway and passing through the radiation emanating from the source interrupt reception of the beam by the detector, thereby initiating a detection sequence. In one embodiment a visual recording device is positioned for visually recording the vehicle and test results.
    • 一种用于远程检测,测量和记录来自移动机动车辆排气的NOx,CO,CO2,HC和H2O水平的气体分析装置。 它利用准直的红外和紫外线辐射源,并且包括用于接收和测量其源的红外和紫外辐射的机构,以及用于测量环境大气中的背景红外和紫外辐射水平的另一机构。 接收机构将组合的红外和紫外线辐射分成红外和紫外线。 机构接收单独的紫外线并产生表示NOx的信号。 另一种机制将红外光束分成两到四个部件,并且设备被定位成用于接收每个红外分量,并产生指示例如CO,CO 2,HC和H 2 O的两至四个信号。 然后,另一个相关机构计算并产生指示来自源的红外线和紫外线辐射路径中的CO,CO 2,HC,NO x和H 2 O的量的信号,从而使其能够测量车辆的排放。 源和接收机构在巷道的相对侧对准,两者均处于被测量车辆排气的高度。 在道路上行驶并通过从源发出的辐射的车辆通过检测器中断接收光束,从而启动检测顺序。 在一个实施例中,定位视觉记录装置用于视觉记录车辆和测试结果。
    • 7. 发明授权
    • Apparatus for remote analysis of vehicle emissions
    • 用于远程分析车辆排放的装置
    • US5401967A
    • 1995-03-28
    • US253749
    • 1994-06-03
    • Donald H. StedmanGary BishopScott McLaren
    • Donald H. StedmanGary BishopScott McLaren
    • G01N21/33G01N21/35G01N21/00G01N21/01G01N21/17
    • G01N21/33G01N21/3504G01N2021/1793G01N2021/1795
    • A gas analysis device for the remote detecting, measuring and recording of NO, CO, CO.sub.2, HC, and H.sub.2 O levels from the exhaust (30) of moving motor vehicles (28) utilizes a source (11) of collimated infrared and ultraviolet radiation (15) and includes a detector unit (16) positioned on the opposite side of the roadway for receiving and measuring the infrared and ultraviolet radiation from the source (11) tranmitted through the vehicle exhaust. The detector unit splits the combined infrared and ultraviolet radiation into separate infrared and ultraviolet beams (42) and (40). The ultraviolet beam is diffracted onto a photodiode array in a spectrometer that generates a signal indicative of NO in the vehicle exhaust. A rotating reflector (27) time-multiplexes the infrared beam to a plurality of infrared sensors that generate electrical signals indicative of, for example, CO, CO.sub.2, HC, and H.sub.2 O in the vehicle exhaust. A computer (17) then computes the relative concentrations of CO, CO.sub.2, HC, NO, and H.sub.2 O in the path of the infrared and ultraviolet radiation from the source, thereby measuring vehicle emissions.
    • 用于远程检测,测量和记录来自运动的机动车辆(28)的排气(30)的NO,CO,CO 2,HC和H 2 O水平的气体分析装置利用准直的红外线和紫外线辐射源(11) 15),并且包括位于道路的相对侧上的检测器单元(16),用于接收和测量通过车辆排气排出的源(11)的红外和紫外线辐射。 检测器单元将组合的红外和紫外线辐射分离成分离的红外和紫外光束(42)和(40)。 紫外光束被衍射到生成表示车辆排气中的NO的信号的光谱仪中的光电二极管阵列上。 旋转反射器(27)将红外光束时间复用到多个红外传感器,其产生指示例如车辆尾气中的CO,CO 2,HC和H 2 O的电信号。 然后,计算机(17)计算来自源的红外线和紫外线辐射的CO,CO2,HC,NO和H2O的相对浓度,从而测量车辆排放。