著者

白岩 史 飛谷 謙介 下斗米 貴之 猪目 博也 藤澤 隆史 饗庭 絵里子 長田 典子 北村 泰彦

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.79, no.11, pp.1159-1164, 2013-11-05 (Released:2014-01-05)

参考文献数

25

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Recently, the number of emergency vehicles equipped with light-emitting diode (LED) warning lights has increased. Unlike traditional beanie lights, LED warning lights can display various flickering patterns because these patterns are controlled by computers. The purpose of this study was to develop flickering patterns that had a high level of visibility. Lighting time (ON time), no-lighting time (OFF time), light intensity and rising time (UP time) were controlled by a microcomputer. Further, the visibility of each LED flickering pattern was evaluated quantitatively. Specifically, the visibility of the flickering patterns using the psychophysical measure of “conspicuity (easy to stand out)” from Bradley-Terry paired comparison model was identified. Results showed that OFF time had a significantly greater influence on visibility than ON time. Moreover, the flickering pattern with 66 msec of OFF time provided optimal visibility, regardless of the ON time, by making the visibility map, which represented the degree of visibility between ON time and OFF time. Therefore, the ideal combination between ON time and OFF time was determined.

著者

片平 建史 武藤 和仁 李 奈栄 飛谷 謙介 白岩 史 中島 加惠 長田 典子 岸野 文郎 山本 倫也 河崎 圭吾 荷方 邦夫 浅野 隆

出版者

Japan Society of Kansei Engineering

雑誌

日本感性工学会論文誌 (ISSN:18845258)

巻号頁・発行日

vol.15, no.4, pp.563-570, 2016 (Released:2016-08-31)

参考文献数

17

被引用文献数

2 2

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In the present study, the subjective evaluation experiment for abstract 3D shapes was conducted as the first step of construction of a system that allows non-design-professional users to design 3D shapes via subjective evaluation words intuitively. In particular, the structure of the subjective evaluation for 3D shapes and the reliability of the evaluation by non-design-professionals were examined. The results showed three-factor solution in which “Uniformity,” “Activity” and “Potency” factors were important evaluative standards in the subjective evaluation for 3D shapes. These factors are similar to Osgood's three factors, which were frequently reported factors in previous semantic differential studies. Furthermore, the subjective evaluations by non-design-professionals were generally consistent, which means that, with respect to the subjective evaluation, non-design-professionals without high level of design skills can evaluate 3D shapes in a reliable way.