Development and promulgation of light environment design methods based on space brightness evaluation

• Project/Area Number: 25289199
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Architectural environment/Equipment
• Research Institution: Tokyo University of Science
• Principal Investigator: Yoshizawa Nozomu 東京理科大学, 理工学部, 教授 (40349832)
• Co-Investigator(Kenkyū-buntansha): HARA NAOYA 関西大学, 工学部, 教授 (00330176) ; MIKI YASUHIRO 国立研究開発法人建築研究所, 環境研究グループ, 主任研究員 (90356014) ; KATO MIKA 金沢工業大学, 基礎教育学部, 講師 (00409054) ; YAMAGUCHI HIDEKI 国土交通省国土技術政策総合研究所, 建築研究部, 主任研究官 (60411229) ; TAKASUGI KEIGO 金沢工業大学, 工学部, 講師 (80710235)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000); Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2013: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
• Keywords: 空間の明るさ / 光環境 / 輝度分布 / 光分布計測ツール / 照明環境 / 輝度・色度測光 / 空間のあかるさ感 / 国際研究者交流：フランス / 空間の明るさ感

Outline of Final Research Achievements

Development and promulgation of energy-efficient design methods are important today because the energy efficiency of buildings is expected to be further improved. The visual comfort of the indoor environment must also be ensured at the same time. In this study, we developed a new evaluation method of space brightness as the index of visual comfort. For non-uniform light environment, average luminance distribution, weighted by its vertical and horizontal direction respectively, was proved to be efficient for estimating space brightness. To diffuse the evaluation method, we also developed a light distribution measurement tool that uses a commercially available digital single-lens reflex camera.

Research Products

• [Journal Article] EVALUATION METHOD OF SPATIAL BRIGHTNESS BY DIRECTIONAL DIFFUSIVITY AND MEAN LUMINANCE (2016)
  • Author(s): Kato, M., Aya, K., Yamaguchi, H., Yoshizawa, N., Hara, N., Miki, Y.
  • Journal Title: Proceedings of CIE Lighting Quality and Energy Efficiency Conference, 2016 Volume: 1 Pages: 664-668
  • Peer Reviewed
• [Journal Article] THE RELATIONSHIP BETWEEN THE BRIGHTNESS OF OVERALL SPACE AND THE BRIGHTNESS IN THE SPECIFIC VISUAL FIELD IN THE NON-UNIFORM ILLUMINATED SPACE (2015)
  • Author(s): Aya.K, Nagamatsu.Y, Yoshizawa.N, Yamaguchi.H, Hara.N, Kato.M, Miki.Y
  • Journal Title: Proceedings of the 28th CIE Session 2015 Volume: 1
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] A COMPARISON STUDY ON SPATIAL BRIGHTNESS EVALUATION BETWEEN DIFFERENT CULTURAL GROUPS (2015)
  • Author(s): Yoshizawa.N, Nagamatsu.Y, Aya.K, Kato.M, Yamaguchi.H, Hara.N, Miki.Y, Dumortier.D, Jost.S and Iborra Bernad.M
  • Journal Title: Proceedings of the 28th CIE Session 2015 Volume: 1
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 空間の輝度分布に基づく明るさ感推定法の構築 （その1）空間の明るさ感評価モデルの検討 (2016)
  • Author(s): 山口秀樹, 安益圭祐, 呂秀秀, 加藤未佳, 原直也, 三木保弘, 吉澤望
  • Organizer: 日本建築学会
  • Place of Presentation: 福岡大学
  • Year and Date: 2016-08-24
• [Presentation] 空間の輝度分布に基づく明るさ感推定法の構築 （その２）不均一な照明環境での空間の明るさ感評価式 (2016)
  • Author(s): 呂秀秀, 安益圭祐, 山口秀樹, 加藤未佳, 原直也, 三木保弘, 吉澤望
  • Organizer: 日本建築学会
  • Place of Presentation: 福岡大学
  • Year and Date: 2016-08-24
• [Presentation] 縮尺の異なる空間における明るさ感の違いに関する検討 (2014)
  • Author(s): 安益圭祐・永松雄大・山口秀樹・加藤未佳・原直也・三木保弘・吉澤望
  • Organizer: 日本建築学会
  • Place of Presentation: 神戸大学鶴甲第1キャンパス（兵庫県）
  • Year and Date: 2014-09-12
• [Presentation] 縮尺の異なる空間における明るさ感の違いに関する検討
  • Author(s): 安益圭祐、永松雄大、山口秀樹、加藤未佳、原直也、三木保弘、吉澤望
  • Organizer: 日本建築学会
  • Place of Presentation: 神戸大学