フルディジタル位相検出型QCM

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2021/09/01

タイトル(英語): Fully Digital Phase Detection Quartz Crystal Microbalances

著者名: 今池　健（日本大学理工学部）

著者名(英語): Takeshi Imaike (College of Science and Technology, Nihon University)

キーワード: 差動型QCM，瞬時周波数，精密周波数計測，ディジタルダウンコンバージョン　　differential QCM，instantaneous frequency，precision frequency measurement，digital down conversion

要約(英語): In this paper, we propose a new method to improve the frequency resolution and time resolution of QCM, which measures masses of several nanograms or less by using changes in the resonance frequency of the quartz crystal resonator. Since our method does not use a frequency counter to measure the frequency, there is no waiting time due to the gate time, therefore high-speed frequency measurement is possible. In this method, the output waveforms of two crystal oscillators are sampled directly by a 2-channel AD converter and the phase is calculated by numerical calculation processing on the sampled digital data. The instantaneous frequency is calculated from the time derivative of the obtained phase and converted into the change in mass.In order to verify the frequency measurement accuracy of the fully digital phase detection QCM, the frequency change simulating the mass change was used and compared with the conventional high-precision differential QCM using reciprocal counter. As a result, it was shown that the frequency resolution and time resolution could be significantly improved.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.141 No.9 （2021） 特集：イノベーションを創出する最新の計測技術2021

本誌掲載ページ: 498-503 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/141/9/141_498/_article/-char/ja/