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Discomfort glare and discomfort glare evaluation


Line results and subjective evaluation of the comparison. Subjective evaluation of the vertical axis (with units), the abscissa for the three systems were calculated. The results of subjective evaluation and the correlation coefficient between the: and the VCP 0.64, and 0.64 for GI, and brightness limit curve of the first Yang Gongxia l7, No. 2, etc.: discomfort glare and discomfort glare evaluation l5SubjectiveappraisalSubjectiveappraisalSubjective appraisal (glareindexunits) (glareindexunits) (glareindexunits) GlareindexGlarerating0 Notes: Subjectiveappraisal (glareindexunit) = subjective evaluation (GI evaluation unit), Glareindex = GI evaluation system, Glarerating = brightness limit curve of the evaluation value. Figure 3 for several different lighting glare subjective evaluation of the average value, calculated relative to the VCP, GI and glare brightness limit curve, the average rating value plotted curve. Subjective evaluation of the scale, said: l3 = can feel the glare, l6 = just unacceptable glare,abercrombie pas cher, glare 19 = unacceptable, 22 = just uncomfortable glare, uncomfortable glare 25 = 28 = just can not stand glare. Average glare evaluation of correlation coefficients of 0.52. The correlation coefficient means that the average GI and VCP shows subjective evaluation of the 41% limit curve, the average brightness of the glare evaluation only explained 27%. System as expected in terms of discomfort glare seems that three methods are not ideal. As for the relationship between subjective evaluation and UGR, the other by the Akashi conducted an evaluation test, he invited 56 non-lighting experts as subjects, asked to use a kind of a bright side to evaluate the Office of the lamp, and examined with an average of subjective evaluation calculated the correlation between UGR value, correlation coefficient of 0.89. Although subjective evaluation there are still some deviations, but such a high correlation coefficient surprising. It can be said that so far UGR glare is expected to feel comfortable interior can not be the best way. But with the UGR system does not mean we have mastered and can be expected to control the lighting of the uncomfortable glare of the tool. In fact, there are also many. From the surface point of view, the first general glare source between 0.005m ~ 1.5m of the question, with a small light source is expected UGR ( 1.5m) is too loose. In addition, how to determine the actual lighting glare source brightness and size. For example, parabolic lighting, which is the most widely used fluorescent lamps, it does not have clear boundaries of uniform brightness, more precisely, their brightness is not uniform. This makes it difficult to determine the size of the glare source, which is the size of solid angle. For the handling of such lamps require further consideration. Followed by a glare source is close to the surrounding brightness, this part of the brightness in the glare source brightness and background brightness of the question, it produces feelings of the role of reducing glare. But the glare is not a method takes into account its expected role. Also,franklin marshall pas cher, the size of the source of glare, especially large glare sources such as light-emitting ceiling, because they area large enough to interact and adapt to the brightness and range of general lighting and light ceiling light of the question of transition. Deeper speaking, we have not yet really understand the glare it causes a variety of explanations such as changes in pupil size from that distraction. As long as one example will suffice, when we were facing a very bright sun light frosted glass windows, we feel very comfortable, but if this is a transparent glass,mbt chaussures paris, and have a good look at the scenery outside the window, we do not will feel uncomfortable, but to appreciate it as beautiful. This shows that when look at the vision in information content, it is not an uncomfortable glare. These issues remain to be further studied. Also need to note that GI and VCP are two ways, both in the laboratory using a light box to do, the light box of the surface showing a bright spot, namely glare source, its size and brightness can be changed, it is also the background brightness can change. In the background before the show after a glare source, were asked to evaluate them. Therefore, GI and VCP two methods is a bright spot against the evaluation,birkenstock paris, the actual indoor lighting is different. Hard to solve these problems now, following the first front on the issue with the UGR approach to make a profile. (The expected continued)
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