? about TX smog laws
- Thread starter bartman
- Start date
powerboatr
living well in Texas
how it works, coutesy of TSU
"The RES that is used in the vehicle emission data collection is called SMOG DOG (SBRC, 1995 and Jack et al, 1995), which was developed by the Santa Barbara Research Center (SBRC), a wholly owned subsidiary of Hughes Aircraft Company. It is an application of advanced technology developed for environmental monitoring from space to accurate measurement of automotive emissions on earth. It was initially developed for providing a cost-effective tool for screening for high emitter vehicles and has experienced many successful applications in Arizona, California, North Carolina, Alaska, Georgia, and New Mexico. Some other states are also starting the use of RES to reduce automobile pollution.
The SMOG DOG, which consists of a sensor head, source, video camera, and state-of-the-art electronics for capture, display, and storage of both image data (automobile license plates) and vehicle emission data, uses a remote sensing technique that has been used for many years for satellite monitoring of ecological and environmental points of interest like earth’s atmosphere and forest. In its vehicle emission sensing, infrared “light” is passed through a vehicle’s exhaust plume and is absorbed by the different gases in the plume. The sensor determines changes in the selective absorption of infrared radiation by molecular vibrational modes at wavelengths specific to the pollutant; i.e., HC, CO, NOx, and CO2. Changes are measured using chemically specific detectors, which sense radiation only at these wavelengths. The motion of a vehicle through the beam triggers the simultaneous measurement of CO, HC, NOx, and CO2 in the dispersing exhaust cloud for a user-selectable period (typically one-second). The data from all four pollutants are analyzed in a real time and the results, expressed as a percentage of the exhaust, are stored on computer disk. The image data is stored on a VCR tape, which can be read by an operator and the license plate information is entered into the same file as the emission data"
"The RES that is used in the vehicle emission data collection is called SMOG DOG (SBRC, 1995 and Jack et al, 1995), which was developed by the Santa Barbara Research Center (SBRC), a wholly owned subsidiary of Hughes Aircraft Company. It is an application of advanced technology developed for environmental monitoring from space to accurate measurement of automotive emissions on earth. It was initially developed for providing a cost-effective tool for screening for high emitter vehicles and has experienced many successful applications in Arizona, California, North Carolina, Alaska, Georgia, and New Mexico. Some other states are also starting the use of RES to reduce automobile pollution.
The SMOG DOG, which consists of a sensor head, source, video camera, and state-of-the-art electronics for capture, display, and storage of both image data (automobile license plates) and vehicle emission data, uses a remote sensing technique that has been used for many years for satellite monitoring of ecological and environmental points of interest like earth’s atmosphere and forest. In its vehicle emission sensing, infrared “light” is passed through a vehicle’s exhaust plume and is absorbed by the different gases in the plume. The sensor determines changes in the selective absorption of infrared radiation by molecular vibrational modes at wavelengths specific to the pollutant; i.e., HC, CO, NOx, and CO2. Changes are measured using chemically specific detectors, which sense radiation only at these wavelengths. The motion of a vehicle through the beam triggers the simultaneous measurement of CO, HC, NOx, and CO2 in the dispersing exhaust cloud for a user-selectable period (typically one-second). The data from all four pollutants are analyzed in a real time and the results, expressed as a percentage of the exhaust, are stored on computer disk. The image data is stored on a VCR tape, which can be read by an operator and the license plate information is entered into the same file as the emission data"