| Project/Area Number |
18K04181
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21030:Measurement engineering-related
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| Research Institution | Nihon University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | QCM / 瞬時周波数計測 / 瞬時位相 / 水晶発振器 / SDR / フルディジタル / 位相検出 / 瞬時周波数 / ＱＣＭ / ディジタルダウンコンバージョン / FPGA / ディジタルダウンコンンバージョン |
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| Outline of Final Research Achievements |
We conducted research to improve the measurement accuracy of QCMs (Quartz Crystal Microbalances), which can detect changes in mass of less than a few nanograms as changes in resonance frequency, in a shorter measurement time. In conventional measurement methods, a crystal unit is incorporated into an oscillation circuit and a frequency counter is used to read changes in the oscillation frequency. In this method, not only is the measurement time determined by the gate time of the counter, but also a longer gate time is required to improve the frequency measurement accuracy, which is a contradiction between improving measurement accuracy and reducing measurement time. This research has reduced the time resolution to the order of microseconds and improved the frequency resolution by six digits.
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| Academic Significance and Societal Importance of the Research Achievements |
従来方式のQCMを用いた微小質量計測では，その時間分解能が数ミリ秒～数秒間隔で周波数分解能も数ヘルツ程度であった．本研究成果では時間分解能がマイクロ秒のオーダーで周波数分解能がミリヘルツ以下という超高速・超高分解能なQCM計測が可能となった．この研究成果はバイオセンサ，においセンサなどの更なる性能向上が実現可能で，医療分野や環境モニタリングなど多方面の分野において研究発展に寄与するものである．
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