Development of Homogeneity Requirement for Position Lights: Transformation from Subjective to Objective evaluation
Typ
Examensarbete för masterexamen
Program
Product development (MPPDE), MSc
Publicerad
2020
Författare
Srinivas, Suhas
Veda Prabhakar, Suhas
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Exterior lighting has become an important factor across all the automotive industry.
Conventionally, light was only used to illuminate the road and help the users to have a
clear vision of the road in the darkness but now it has become premium design feature
for aesthetic appeasement. Lately users have started to identify the brand of the car by
just viewing the light from the lamps.
Many car-manufacturers are striving to get a homogeneous intensity of position lights.
Light homogeneity has become a major factor under consideration during lamp design
and development. Precedence is given to the perception of homogeneity by human eye
over equipmental data of the same.
This thesis aims to overcome the subjective evaluation of light homogeneity of lamps by
bring in an objective approach and to generate corresponding requirement. The thesis
work also aims to generate a verification method that can be integrated to the requirement
generated.
Using product development approach and established laws of photometry, an experimental
investigation is performed inorder to determine quantifiable limits that assists the
requirement. Investigation involves study on various factors that influence homogeneity
such as eye perception, distance and angle of judgement, legal requirement and design
intent. The thesis incorporates user study, which served as a foundation for obtaining
subjective data and setting the requirement.
Threshold values for intensity variation via response threshold was determined. It was
investigated and verified that -13% and +9% were the threshold response variation between
two regions, violation of which would deem the regions to appear inhomogeneous.
The verification of requirement is methodically generated which was specific to the tools
that were available.
Beskrivning
Ämne/nyckelord
Homogeneity, Position Light, Requirement, Verification, , Perceived Quality Illumination