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成果報告書詳細
管理番号20170000000195
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 水晶振動子を利用した信頼性向上が期待できる水素センサの研究開発
公開日2017/6/7
報告書年度2016 - 2016
委託先名学校法人早稲田大学 KOA株式会社
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 of Highly-reliable Hydrogen Sensors using Quartz Resonator (FY2014-FY2017) FY2016 Annual Report

This project is carrying out to develop advanced hydrogen leakage sensors for earnest dissemination of hydrogen-filling stations in 2025. The sensor is consist of quartz resonators and Pt catalyst. In order to improve its reliability, we are developing a deterioration detection function using Q-factor monitoring. In this FY, we focused on development of a second prototype of portable hydrogen detector. This prototype have been built using the development achievements described below.

At first, on the basis of last FY's results, optimal resonator size for the hydrogen sensors was investigated. Q-factor of quartz resonator is one of the most important parameter to determine stability of the sensors, and it is very sensitive for its shape and size. Thus, sensors with four different sizes were designed and compared. As a result, the highest Q-factor which value was approximately 10000 in average, was at the sensor with 2800 μm in length named model-L. Q-factor is going to be decreased by influence of contaminations. Also, when Q-factor became less than 3000, the sensor will not work. Therefore, it is thought that a Q value of 10000 will be a threshold of initial Q-factor to judge good or bad products, and it will be regarded as out of a guarantee when Q-factor of resonators comes less than 5000. After that, sensitivity of the sensors were evaluated. To follow the changed design of sensors, LTCC packages were also redesigned. In addition, a mounting method for the sensor element in the package which includes mounting procedure, tools, and conditions, was improved.
Secondly, to improve heating ability and stability of sensor, performance of the heater control circuit was reconsidered. As a solution, an internal voltage boosting circuit and an optimized resistance bridge circuit were installed.
Thirdly, to realize an intrinsically safe construction on the detector, we investigated about key-components such as current limiting resistors and safety fuses. Then, a circuit pattern layout using current limiting resistors which have sufficient power rating followings IEC standards was designed for the power supply circuit of detector.
In addition, about the stationary hydrogen detectors which is scheduled to develop in mainly next FY, the concrete functions and the directionality of design were discussed.
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