2 0 0 0 OA 気体中の水晶振動子のインピーダンスと周波数の圧力依存性の比較
- 著者
- 黒河 明 北條 久男 小林 太吉
- 出版者
- 一般社団法人 日本真空学会
- 雑誌
- Journal of the Vacuum Society of Japan (ISSN:18822398)
- 巻号頁・発行日
- vol.54, no.3, pp.196-198, 2011 (Released:2011-05-17)
- 参考文献数
- 7
- 被引用文献数
- 1
The vibrating quartz oscillator in the viscous-flow gas was observed to compare the pressure (P) dependence between the impedance change (ΔZ) and the frequency change (ΔF). We obtained the ΔZ and the ΔF for Ar, O2, and Ne gases. Among Ar and O2 both the ΔZs and the ΔFs had no intersection with each other. However, Ne gas had the intersections with Ar gas with the ΔZ(P) and with O2 for the ΔF(P). The phenomenon was caused by the Ne property which Ne has smaller mass but larger viscosity compared with Ar and O2. The ΔZ-ΔF property showed that the property of each gas lied in the viscosity descending order, i.e., Ne, Ar, O2. The measurement of (ΔZ, ΔF) property could give the viscosity related information.
1 0 0 0 屋外水素漏洩検知のための温度安定型水晶振動子による温度の影響低減
- 著者
- 鈴木 淳 北條 久男 小林 太吉
- 出版者
- The Vacuum Society of Japan
- 雑誌
- Journal of the Vacuum Society of Japan (ISSN:18822398)
- 巻号頁・発行日
- vol.58, no.5, pp.177-180, 2015
- 被引用文献数
- 1
A novel quartz oscillator that has a temperature-stable output was investigated for outdoor hydrogen sensing. The output from the quartz oscillator remained almost constant for temperatures in the range of 15 to 50℃. Fluctuations of the output of the quartz oscillator in this temperature range were 0.3% at constant relative humidity of 0%RH, which corresponds to the change in the output when 0.3 vol% of hydrogen leaked in air. This change is thus sufficiently lower than the necessary minimum detection level of 1 vol% hydrogen concentration using the novel quartz oscillator's output during outdoor hydrogen sensing.<br>
1 0 0 0 屋外水素漏洩検知のための温度安定型水晶振動子による温度の影響低減
- 著者
- 鈴木 淳 北條 久男 小林 太吉
- 出版者
- 一般社団法人 日本真空学会
- 雑誌
- 真空技術 (ISSN:18822398)
- 巻号頁・発行日
- vol.58, no.5, pp.177-180, 2015
- 被引用文献数
- 1
A novel quartz oscillator that has a temperature-stable output was investigated for outdoor hydrogen sensing. The output from the quartz oscillator remained almost constant for temperatures in the range of 15 to 50℃. Fluctuations of the output of the quartz oscillator in this temperature range were 0.3% at constant relative humidity of 0%RH, which corresponds to the change in the output when 0.3 vol% of hydrogen leaked in air. This change is thus sufficiently lower than the necessary minimum detection level of 1 vol% hydrogen concentration using the novel quartz oscillator's output during outdoor hydrogen sensing.<br>