Do changes in voltage result in proportional changes throughout headlamp beam pattern?
dc.contributor.author | Sivak, Michael | en_US |
dc.contributor.author | Flannagan, Michael J. | en_US |
dc.contributor.author | Traube, Eric C. | en_US |
dc.contributor.author | Miyokawa, T. | en_US |
dc.date.accessioned | 2010-04-14T14:00:23Z | |
dc.date.available | 2010-04-14T14:00:23Z | |
dc.date.issued | 1999 | en_US |
dc.identifier.citation | Sivak, M.; Flannagan, M.J.; Traube, E.C.; Miyokawa, T. (1999). "Do changes in voltage result in proportional changes throughout headlamp beam pattern?." Lighting Research & Technology 1(31): 1-3. <http://hdl.handle.net/2027.42/68799> | en_US |
dc.identifier.issn | 1477-1535 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/68799 | |
dc.description.abstract | This study evaluated the effects of voltage changes on beam patterns of low-beam headlamps. Seven different types of filament lamps were tested. The voltages used were 12.0, 12.8 and 13.5V. The photometry was performed from 20° left to 20° right, and from 5° down to 5° up, all in steps of 0.5°. The main finding of this study is that, for all seven lamps tested, voltage changes between 12.0V and 13.5V caused light output to change by the same proportion throughout the beam pattern. Therefore, for filament lamps, it is reasonable to use a single constant for all values in a beam pattern when converting a headlighting specification at one voltage to a specification at a different voltage, at least if the voltages in question are between 12.0 V and 13.5 V. The constants obtained across the seven lamps tested were similar to each other. Furthermore, these constants were in general agreement with the constants derived using the standard IES formula relating light-output changes to voltage changes. | en_US |
dc.format.extent | 3108 bytes | |
dc.format.extent | 359891 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.publisher | SAGE Publications | en_US |
dc.title | Do changes in voltage result in proportional changes throughout headlamp beam pattern? | en_US |
dc.type | Article | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | The University of Michigan Transportation Research Institute, 2901 Baxter Road, Ann Arbor, MI 48109-2150, USA | en_US |
dc.contributor.affiliationum | The University of Michigan Transportation Research Institute, 2901 Baxter Road, Ann Arbor, MI 48109-2150, USA | en_US |
dc.contributor.affiliationum | The University of Michigan Transportation Research Institute, 2901 Baxter Road, Ann Arbor, MI 48109-2150, USA | en_US |
dc.contributor.affiliationum | The University of Michigan Transportation Research Institute, 2901 Baxter Road, Ann Arbor, MI 48109-2150, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/68799/2/10.1177_096032719903100101.pdf | |
dc.identifier.doi | 10.1177/096032719903100101 | en_US |
dc.identifier.citedreference | Sivak M., Flannagan M.J. and Sato T. Light output of U.S., European, and Japanese low-beam headlamps Transportation Research Record 1456 99—111 (1994) | en_US |
dc.identifier.citedreference | IES lighting handbook, Reference volume (New York: Illuminating Engineering Society) (1984) | en_US |
dc.identifier.citedreference | Sivak M., Flannagan M.J., Kojima S. and Traube E.C. A market-weighted description of low-beam headlighting patterns in the US SAE Technical Paper Series 980317 (Warrendale, PA : Society of Automotive Engineers) (1998) | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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