JP4977669B2 - 差圧式流量計 - Google Patents
差圧式流量計 Download PDFInfo
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- JP4977669B2 JP4977669B2 JP2008228485A JP2008228485A JP4977669B2 JP 4977669 B2 JP4977669 B2 JP 4977669B2 JP 2008228485 A JP2008228485 A JP 2008228485A JP 2008228485 A JP2008228485 A JP 2008228485A JP 4977669 B2 JP4977669 B2 JP 4977669B2
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- flow rate
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- differential pressure
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Description
尚、上記の実験流量式Qは、従前の連続方程式を基礎とする下記流量演算式(2)をベースにして本願発明者によって新規に提案されたものである。
Claims (1)
- 最大流量の100〜10%までの流量域を測定する差圧式流量計と最大流量の10%〜1%までの流量域を測定する差圧流量計とを組み合せ、測定すべき流体を前記各流量域に応じて切換弁により前記各差圧流量計へ切換え供給することにより、広流量域に亘って高精度な流量測定を行う差圧式流量計であって、
各差圧式流量計を、オリフィスと、オリフィス上流側の流体圧力P1の検出器と、オリフィス下流側の流体圧力P2の検出器と、オリフィス上流側の流体温度Tの検出器と、前記各検出器からの検出圧力P1、P2及び検出温度Tを用いて流体流量Qを演算する制御演算回路とから成る差圧式流量計であって、且つ前記制御演算回路に、流体流量QをQ=C1・P1/√T・((P2/P1)m−(P2/P1)n)1/2(但しC1は比例定数、m及びnは定数)により演算する流量演算回路と、予め実測により求めたオリフィス下流側圧力P2の変動と前記流体流量Qの流量誤差Errorとの関係を記憶した補正データ記憶回路と、前記演算した流体流量Qを補正データ記憶回路からの補正用データにより補正する流量補正演算回路とを設け、オリフィス下流側圧力P2の変動に応じて演算した流体流量Qを補正し、補正後の流量値Q’を出力する構成のものとしたことを特徴とする差圧式流量計。
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JP2008228485A JP4977669B2 (ja) | 2008-09-05 | 2008-09-05 | 差圧式流量計 |
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JP2008228485A JP4977669B2 (ja) | 2008-09-05 | 2008-09-05 | 差圧式流量計 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2003190988A Division JP4204400B2 (ja) | 2003-07-03 | 2003-07-03 | 差圧式流量計及び差圧式流量制御装置 |
Publications (2)
Publication Number | Publication Date |
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JP2008286812A JP2008286812A (ja) | 2008-11-27 |
JP4977669B2 true JP4977669B2 (ja) | 2012-07-18 |
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JP2008228485A Expired - Lifetime JP4977669B2 (ja) | 2008-09-05 | 2008-09-05 | 差圧式流量計 |
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Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103542915B (zh) * | 2013-10-31 | 2016-09-14 | 湖南省计量检测研究院 | 一种气体小流量标准装置 |
JP6372998B2 (ja) * | 2013-12-05 | 2018-08-15 | 株式会社フジキン | 圧力式流量制御装置 |
KR101606497B1 (ko) | 2015-02-26 | 2016-03-25 | 충남대학교산학협력단 | 유량함수 내장형 질량유량계 교정방법 |
CN111033104B (zh) * | 2017-09-30 | 2021-12-03 | 株式会社富士金 | 阀以及流体供给管线 |
CN111033430A (zh) * | 2017-09-30 | 2020-04-17 | 株式会社富士金 | 流体供给管线及动作解析*** |
CN109724659B (zh) * | 2017-10-31 | 2024-01-16 | 宁波方太厨具有限公司 | 一种灶具燃气流量测试***及测试方法 |
JP2019158126A (ja) * | 2018-03-16 | 2019-09-19 | Jxtgエネルギー株式会社 | 水素燃料の充填システム、及び水素燃料の充填方法 |
KR102584401B1 (ko) * | 2021-10-06 | 2023-10-05 | 엠케이피 주식회사 | 유체 제어장치 및 유체 제어방법 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2818083B2 (ja) * | 1992-10-27 | 1998-10-30 | 矢崎総業株式会社 | 流量測定装置 |
US5868159A (en) * | 1996-07-12 | 1999-02-09 | Mks Instruments, Inc. | Pressure-based mass flow controller |
US6510746B1 (en) * | 1999-07-12 | 2003-01-28 | Ford Global Technologies, Inc. | Gas flow measurement |
JP4691236B2 (ja) * | 2000-10-17 | 2011-06-01 | 愛知時計電機株式会社 | 気体用流量計 |
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2008
- 2008-09-05 JP JP2008228485A patent/JP4977669B2/ja not_active Expired - Lifetime
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JP2008286812A (ja) | 2008-11-27 |
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