成果報告書詳細
管理番号20160000000235
タイトル*平成27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2016/9/7
報告書年度2015 - 2015
委託先名学校法人早稲田大学 株式会社坂本電機製作所 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) FY2015 Annual Report

This project is carrying out to develop an advanced stationary hydrogen detector for earnest dissemination of hydrogen-filling stations (HFSs) in 2025. The sensor is consist of quartz resonator and Pt catalyst. In order to improve reliability, a deterioration detection function by Q-factor
monitoring is developing.
In a meeting with NEDO staffs and HFS experts (Feb. 27), we had a opinion that developing handy-type hydrogen detectors and collecting empirical data in a demonstration HFS in this project is one way to market the sensor in early period. Additionally, the actual application and its specification should be set clearly and quickly. Therefore, we have decided to develop handy- and stationary-type detectors, but we focus on developing a prototype of handy-type detector in this FY (Apr. 24).

The items we have carried out in this FY are as below.
(1) Investigation of requirements and evaluation method for hydrogen sensors.
(2) Sensitivity improvement and fabrication process establishment.
(3) Development of simulation technologies.
(4) Improvement of sensor evaluation system.
(5) Survey on the hydrogen sensor in the instrumentations of the HFS.
(6) Development of driving circuits.
(8) Survey on laws and regulations in the hydrogen sensor practical use.
(9) Development of sensor package.
(10) Development of the case of sensor detecting part.
(11) Development and evaluation of sensing system.
(12) Survey on explosion-proof construction.

First, actually used hydrogen detectors were investigated by visiting the commercially operated HFS. Requests and opinions for hydrogen sensors from there engineers were collected. Then, based on the result, and to follow JIS and ISO, specification of handy- and stationary-type detector which includes lower-detecting-limit and response time, etc., was decided. As a result of surveying, necessity of certification of explosion-proof constructions (ib, d, px, etc.) was clarified to use hydrogen
detectors at inside or surrounding of dispensers. Additionally, explosion-proof enclosures (d) have been commonly used on the HFS.
Second, as a result of development, processing conditions for Nano-Pt catalyst on the sensor were investigated for the sensor improvement, and four times higher sensitivity was achieved. Operation verifications of the small oscillation circuits and Q-factor detecting circuits were done by a circuit simulator and PCBs. Then, a first-order prototype of sensor package was developed. The sensor chip is mounting in the front side cavity of the package, and other side was used for mounting of electronic
devices (2ch oscillation circuits and Q-factor detecting circuit).
Finally, each units (suction mechanism, plastic case, signal processing by micro computer, switches and LCD, analog and digital signal output, etc.) for the first-order prototype of handy-type detector, were developed. The detailed system verification of the prototype detector is planed in the next FY.
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