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公开(公告)号:US20230358634A1
公开(公告)日:2023-11-09
申请号:US18028540
申请日:2021-09-16
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor: Jiangbi HU , Yunpeng GUO , Xiaojuan GAO , Ronghua WANG
IPC: G01M11/02
CPC classification number: G01M11/0207
Abstract: The disclosure relates to a method for measuring parameters of roadway low-position lighting fixtures, comprising: selecting a plurality of sets of low-position lighting fixtures with preset color temperatures and color rendering indexes, or a set of low-position lighting fixtures configurable with multiple pairs of preset color temperature and color rendering index; for each set of the plurality of sets of low-position lighting fixtures or each pair of preset color temperature and color rendering index in the set of low-position lighting fixtures, dynamically recognizing a target under different predetermined luminance levels at different predetermined operating speeds; using obtained samples to fit a relationship model between recognition distance and luminance; and based on the fitted relationship model, determining at least one set of said plurality of sets of low-position lighting fixtures or determining at least one pair of preset color temperature and color rendering index for said set of low-position lighting fixtures. The disclosure also relates to an installation method of roadway low-position lighting fixtures and a road on which the lighting fixtures are installed. The invention overcomes the problems in the existing lighting fixture design in terms of the characteristic indicators of light source, installation height and light distribution.
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公开(公告)号:US20190033140A1
公开(公告)日:2019-01-31
申请号:US15580363
申请日:2016-12-30
Inventor: Jiangbi HU , Xiaoyu LI , Xiaojuan GAO , Xiaoqin ZHANG , Guiping GUAN , Jianmin WANG , Feng LIU , Linxi GAO , Yuanfeng ZHANG , Jiamei LIU , Pengfei XU , Jianlong CHENG , Jiechao CHENG , Ronghua WANG
Abstract: The present invention relates to a visual efficacy measuring method for objects in different light environments, which comprises: (a) setting a light environment; (b) measuring a relationship between color temperature and time; (c) a driver visually recognizing a target object; (d) resetting the light environment, and repeating the step (c); (e) processing the visual recognition information data collected by the experiments so as to establish a relationship of the visual recognition time in relation with the light environmental parameters of color temperature, color rendering index and brightness; (0 performing visual efficacy analysis according to the processing results of the visual recognition information data. The present invention also provides a color temperature standard determining method for a tunnel middle section in day time, which comprises: (a) setting a light environment; (b) measuring a relationship between color temperature and time; (c) selecting a stably distributed color temperature segment; (d) determining the color temperature standard. The method of the present invention performs visual efficacy analysis of the influence that light environment settings of illumination on a night road or in a tunnel middle section have on drivers' visual recognition activity, thereby providing a good guiding standard for reasonable and efficient setting of color temperature, color rendering index and average brightness of an illumination device.
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