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成果報告書詳細
管理番号20170000000193
タイトル*平成28年度中間年報 水素利用技術研究開発事業 水素ステーション安全基盤整備に関する研究開発 水素火炎可視化機能を有する監視システムの研究開発
公開日2017/6/7
報告書年度2016 - 2016
委託先名株式会社四国総合研究所
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Title : Research and development project for hydrogen utilization technology. Research and development concerning hydrogen station safety infrastructure development. Research and development concerning monitoring system with functions for hydrogen flame visualization. (FY2014-FY2017) FY2016 Annual Report

1. For “detecting a small flame of about 2 cm at a distance of 5 m,” which is the development target, it is effective to perform monitoring at a position as close to the area where occurrence of a hydrogen flame is anticipated as possible. From this standpoint, we proposed the “optical transmission method” as the device specification, in which the visible light as the background image and the near-infrared light emitted from a hydrogen flame were gathered using an object lens system, and transmitted and imaged through a dedicated image fiber. In this method, explosion-proof measures are not required when the device is installed at the site. 2. The image of a hydrogen flame taken combining a near-infrared optical system and the standard image fiber (for visible light) of the manufacturer was low-contrast and unclear due to insufficient light intensity, etc. Therefore, we designed and manufactured a custom image fiber dedicated to near-infrared light, which had high near-infrared transmittance. In the imaging test of a hydrogen flame using the optical system and the custom image fiber, it was verified that the low-contrast problem of the visible light image fiber was improved. 3. The lights captured to visualize a hydrogen flame are the visible light as the background image and the near-infrared light emitted from a hydrogen flame. We designed and manufactured in this development a field-test model device by which the visible light and near-infrared light were separated using a two-wavelength spectroscope installed at the exit end of the object lens gathering these lights, and were guided into the imaging system through two dedicated image fibers for visible light and near-infrared light. In the imaging test using this model deice, it was demonstrated that a small flame of about 2 cm could be visualized even if the separation distance was about 5 m. 4. To evaluate the adequacy of the technology developed, performance was verified of the flame detectors of the ultraviolet type and the ultraviolet/infrared combination type. As a result, it was found that both detectors, under the setting condition as delivered, were low in responsibility compared to the field-test model device, and could not detect a small flame of about 2 cm. 5. We investigated the spectral characteristics of several types of light sources that might enter the object lens of the hydrogen flame visualization device in actual hydrogen stations, such as various headlamps for automobiles, various rotating lamps and welding sparks. It was found that there were some light sources with spectral characteristics that could become disturbance light in detection of a hydrogen flame.
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