JP2007530941A5 - - Google Patents

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Publication number
JP2007530941A5
JP2007530941A5 JP2007504968A JP2007504968A JP2007530941A5 JP 2007530941 A5 JP2007530941 A5 JP 2007530941A5 JP 2007504968 A JP2007504968 A JP 2007504968A JP 2007504968 A JP2007504968 A JP 2007504968A JP 2007530941 A5 JP2007530941 A5 JP 2007530941A5
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JP
Japan
Prior art keywords
power
load
power supply
flow meter
loop
Prior art date
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Granted
Application number
JP2007504968A
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English (en)
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JP4688865B2 (ja
JP2007530941A (ja
Filing date
Publication date
Priority claimed from US10/810,882 external-priority patent/US7058521B2/en
Application filed filed Critical
Publication of JP2007530941A publication Critical patent/JP2007530941A/ja
Publication of JP2007530941A5 publication Critical patent/JP2007530941A5/ja
Application granted granted Critical
Publication of JP4688865B2 publication Critical patent/JP4688865B2/ja
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Claims (9)

  1. 流量計(40)であって、
    電源装置電圧を供給するループ電源装置(42)と、
    負荷電圧によって給電される負荷(50)であって、少なくとも、流量を計算する処理装置(52)、超音波トランスデューサ電力回路(54)及び超音波トランスデューサ受信回路(58)を含む負荷(50)と、
    前記ループ電源装置(42)と前記負荷(50)との間に配置された電力調整回路(70)と
    を有し、
    前記電力調整回路は、
    前記電源装置電圧に応動して、制御信号に応じて前記負荷電圧を変える電力変換器(80)と、
    前記電力変換器(80)と前記負荷(50)との間に配置されて、前記負荷によって必要とされないときは電力を蓄積し且つ前記負荷によって必要とされるときは電力を送り出す安全蓄電装置と、
    前記負荷(50)による前記ループ電源装置(42)の設定に基づいて前記変換器に制御信号を供給する制御サブシステム(84)と
    を含んでおり、
    前記流量計(40)は、さらに、
    前記負荷電圧を検出して、1つ以上の所定の設定点で電力消費を低減するように構成されている電力管理サブシステム(64)
    有する流量計(40)。
  2. 前記ループ電源装置(42)は4〜20mAのループ電源装置である、請求項1記載の流量計。
  3. 前記電力変換器(80)はスイッチング式電力変換器である、請求項1記載の流量計。
  4. 前記安全蓄電装置はコンデンサ(82)である、請求項1記載の流量計。
  5. 前記制御サブシステム(84)は、前記ループ電源装置(42)に接続された1つの入力及び基準電圧に接続された別の入力を持つ制御増幅器(86)を含んでいる、請求項1記載の流量計。
  6. 前記電力管理サブシステム(64)は低レベル電力管理部分を含んでいる、請求項1記載の流量計。
  7. 更に、前記負荷に接続されたトランスデューサ(56)を含んでいる請求項1記載の流量計。
  8. 更に、前記ループ電源装置に給電するための1つ以上の蓄電池を含んでいる、請求項1記載の流量計。
  9. 更に、前記ループ電源装置に給電するための1つ以上の太陽電池を含んでいる、請求項1記載の流量計。
JP2007504968A 2004-03-26 2005-02-23 低電力超音波流量計 Expired - Fee Related JP4688865B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/810,882 US7058521B2 (en) 2004-03-26 2004-03-26 Low power ultrasonic flow meter
US10/810,882 2004-03-26
PCT/US2005/005816 WO2005103631A1 (en) 2004-03-26 2005-02-23 Low power ultrasonic flow meter

Publications (3)

Publication Number Publication Date
JP2007530941A JP2007530941A (ja) 2007-11-01
JP2007530941A5 true JP2007530941A5 (ja) 2011-02-24
JP4688865B2 JP4688865B2 (ja) 2011-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007504968A Expired - Fee Related JP4688865B2 (ja) 2004-03-26 2005-02-23 低電力超音波流量計

Country Status (5)

Country Link
US (1) US7058521B2 (ja)
EP (1) EP1733194A1 (ja)
JP (1) JP4688865B2 (ja)
CN (1) CN100419387C (ja)
WO (1) WO2005103631A1 (ja)

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