Photometric and Optical Methods of Lamp Analysis

Lewin, Ian; O'Farrell, John

doi:10.4271/980323

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…The MS was received on 6 December 2002 and was accepted after revision for publication on 30 August 2003. con ned to thermal analysis in lamps [1,2] or lamp performance [3][4][5], and few studies have been carried out on a lamp model for computer simulations of wiring systems.…”

Section: Introductionmentioning

confidence: 99%

Headlamp modelling for simulating the capacity of automotive wiring systems

Lim

Park

2003

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper presents a headlamp model that can be used as part of a computer simulation of a wiring system in a vehicle. As more electrical equipment is installed in a vehicle, the wiring system connecting such equipment becomes more complicated, and thus it is essential to conduct a simulation of the wiring system to con rm its capacity. To perform this simulation requires exact models of the electrical equipment tted to the vehicle. A headlamp model is especially important since currents owing in the lamp vary dramatically. In this paper, a headlamp model is developed on the basis of the rst law of thermodynamics, which is also applicable to a fog lamp. The headlamp is modelled as a variable resistor whose resistance is determined by the change in the operating temperature on account of the applied voltage. The resistance change was simulated using the model, and the resistance of an actual headlamp in a car was measured. Since the complete model is too complex, a simpli ed simulation model, suitable for use in a computer simulation, is also presented. Comparison of the two results showed good agreement, and through this simulation the reliability of the presented model was con rmed.

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Section: Introductionmentioning

confidence: 99%

Headlamp modelling for simulating the capacity of automotive wiring systems

Lim

Park

2003

Proceedings of the Institution of Mechanical Engineers, Part D:

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Computer aided optical design of reflectors in automotive headlights

kumar

Lakkumanan

Prakasan

2006

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper describes a constructive procedure aimed at developing a CAD/CAE/CAM system for designing the reflector of an automobile headlight for a given light intensity distribution on the target (road), considering the styling of modern passenger cars. A design concept is described in which the reflector alone produces the specified illumination pattern. Consider a reflector system consisting of a reflecting surface S, a point light source O, and some object T (road). Assume that the source O, reflector S, and object T are positioned so that the rays reflected off S are incident on T. Depending on the geometry of S the energy radiated by O and redirected by S is distributed on T to produce a certain illumination pattern. A solution of the inverse problem consisting of constructing the reflector S from constraints such as installation space, depth, height, and width of a headlight pertaining to a particular automotive body profile, the object T, and the specified illumination pattern to be achieved on T is presented. This solution is integrated with CATIA V5 for downstream functions such as manufacturing.

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Photometric and Optical Methods of Lamp Analysis

Cited by 2 publications

References 3 publications

Headlamp modelling for simulating the capacity of automotive wiring systems

Headlamp modelling for simulating the capacity of automotive wiring systems

Computer aided optical design of reflectors in automotive headlights

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