Consideration of PLS testing condition from view point of UN Reg.112 requirement. Material used during the discussion of the revision on PLS requirement.

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Presentation transcript:

Consideration of PLS testing condition from view point of UN Reg.112 requirement. Material used during the discussion of the revision on PLS requirement to be suggest for Zoetermeer meeting by working group member, to revise testing condition of PLS measurement. Eiji OBA JASIC

Requirement under Reg.112 Requirement to avoid glare and keep minimum illumination to observe the Traffic Signs. The illumination shall not exceed 625[cd], in any of the orientation measuring point within Zone III. The sum of illumination measured at points 4, 5 and 6 shall be more than 375(cd). This requirement is to secure that enough illumination to observe the traffic sign standing over the road surface. 2 Center illumination Illumination to see Traffic Signs at 50 [m]ahead Illumination to see Traffic Signs at 100 [m] ahead

Partially taken from IGCMS-II Testing and assessment of point light sources_ doc Light is detected as an averaged signal within minimum resolvable pixel size. And the TuV table shows that a lamp of 200[mm] or smaller in diameter is no longer distinguishable.

Aperture and luminance of LED to emulate a headlamp light at 250 [m] at closer distance than the actual 250 [m] target. If PLS evaluation is defined to be measured at 6[m], considering a 70[mm] diameter lamp, the aperture of LED shall be defined to be 1.68 [mm] in diameter, luminance set to 162k[cd/m 2 ] and separation between lamp set to 31 [mm]

Test condition We shall select a candidate condition of the Type Approval test. To be defined: 1. headlamp size = 70[mm] the maximum luminance is consequently derived as 162k[cd/m 2 ] And if not measuring at 250 [m] ahead. 2. Emulation test distance = 6 [m] gives a LED with diameter 1.68[mm] with separation of 31[mm] from each LED source, assuming headlamp of 70 [mm] diameter.

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