REMOTE SENSING OF PARTICULATE EMISSIONS FROM HEAVY-DUTY VEHICLES, PHASE 1
This report summarizes the results of initial tests of a remote sensing system capable of real time detection of particulate emissions from heavy duty transit vehicles under actual on-road operating conditions. The technique employs optical extinction (sometimes called opacity) to measure concentrations of carbon dioxide and soot in the exhaust plumes of individual vehicles. The primary goal of phase I was to ascertain whether or not the new technique held promise of sufficient sensitivity and accuracy for on-road deployment. Thus, laboratory calibration experiments were carried out to evaluate the sensor response. Measurements of carbon dioxide and soot concentrations were then made in a stationary exhaust plume taken directly from a laboratory engine. Qualitative agreement was obtained between the soot and carbon dioxide concentrations measured with the remote sensing technique and those measured with laboratory sampling instruments. Several sources of uncertainty were identified in the initial tests, and modifications are being made for phase II.
- Research funded by the Regional Transit Board through the Center for Transportation Studies, University of Minnesota.
University of Minnesota, St PaulCenter for Transportation Studies
St Paul, MN United States 55101
- Hofeldt, D L
- Prochnau, T J
- Chen, G
- Publication Date: 1994-9-20
- Features: Appendices; Figures; References; Tables;
- Pagination: 79 p.
- TRT Terms: Air pollution; Carbon dioxide; Emissions testing; Environmental protection; Equipment; Exhaust gases; Fly ash; Heavy duty vehicles; Laboratory tests; Measurement; Particulates; Public transit; Real time control; Real time data processing; Remote sensing; Transportation equipment industry
- Uncontrolled Terms: Soot
- Subject Areas: Environment; Highways; Public Transportation;
- Accession Number: 00723580
- Record Type: Publication
- Files: TRIS
- Created Date: Jul 24 1996 12:00AM