JP4824007B2 - 電流測定装置 - Google Patents
電流測定装置 Download PDFInfo
- Publication number
- JP4824007B2 JP4824007B2 JP2007328497A JP2007328497A JP4824007B2 JP 4824007 B2 JP4824007 B2 JP 4824007B2 JP 2007328497 A JP2007328497 A JP 2007328497A JP 2007328497 A JP2007328497 A JP 2007328497A JP 4824007 B2 JP4824007 B2 JP 4824007B2
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- Japan
- Prior art keywords
- current
- resistor
- voltage
- measuring
- field effect
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
2 負荷部
3 ADボード
4,4−1,4−2 電界効果トランジスタ
5,5−1,5−2 コンパレータ
R1,R2,R2−1,R2−2 抵抗
Vr1,Vr1−1,Vr1−2 基準電圧
10,11 演算増幅器
Claims (3)
- 電源部と負荷部との間に直列接続した抵抗値の異なる複数の抵抗と、該抵抗の両端の電圧をディジタル変換して測定ディジタル電流値として出力するADボードとを含む電流測定装置に於いて、
大電流測定用の抵抗に比較して抵抗値の大きい小電流測定用の抵抗に並列接続し、ソースをそれぞれ共通に基準電位に接続した2個の直列接続の電界効果トランジスタと、
前記抵抗値の大きい小電流測定用の抵抗の両端の電位差の絶対値を出力する絶対値回路と、
該絶対値回路の出力と、前記基準電位に接続した基準電圧とを比較し、前記絶対値回路の出力が前記基準電圧を超えた時に前記2個直列接続の電界効果トランジスタをオン状態とするコンパレータと
を備えたことを特徴とする電流測定装置。 - 前記電源部と前記負荷部との間に直列接続した抵抗値の異なる抵抗のそれぞれ両端の電圧を整流平滑化して前記ADボードに入力する整流部を設けたことを特徴とする請求項1記載の電流測定装置。
- 前記電界効果トランジスタをオン状態とする前記コンパレータの出力信号を、測定レンジ切替信号として前記ADボードに入力する構成を備えたことを特徴とする請求項1記載の電流測定装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007328497A JP4824007B2 (ja) | 2007-12-20 | 2007-12-20 | 電流測定装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007328497A JP4824007B2 (ja) | 2007-12-20 | 2007-12-20 | 電流測定装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009150762A JP2009150762A (ja) | 2009-07-09 |
JP4824007B2 true JP4824007B2 (ja) | 2011-11-24 |
Family
ID=40920044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2007328497A Expired - Fee Related JP4824007B2 (ja) | 2007-12-20 | 2007-12-20 | 電流測定装置 |
Country Status (1)
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JP (1) | JP4824007B2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5699301B2 (ja) * | 2010-02-23 | 2015-04-08 | アルプス・グリーンデバイス株式会社 | 電流センサ |
JP2014055876A (ja) * | 2012-09-13 | 2014-03-27 | Fujitsu Telecom Networks Ltd | 電流検出測定装置 |
JP2016063030A (ja) * | 2014-09-17 | 2016-04-25 | シチズンホールディングス株式会社 | Led駆動回路 |
JP2021032735A (ja) * | 2019-08-26 | 2021-03-01 | 日置電機株式会社 | 検出回路及び測定装置 |
CN113922445A (zh) * | 2021-09-24 | 2022-01-11 | 东莞新能安科技有限公司 | 电流采集电路及方法、电池管理***、电池包和用电设备 |
CN114167112B (zh) * | 2021-12-16 | 2024-05-24 | 青岛东软载波智能电子有限公司 | 一种高精度大量程低压差电流测量电路 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02306169A (ja) * | 1989-05-19 | 1990-12-19 | Mitsubishi Electric Corp | 直流電流検出装置 |
JP3628948B2 (ja) * | 2000-02-21 | 2005-03-16 | 富士男 小澤 | 電流/電圧変換回路 |
JP4184245B2 (ja) * | 2003-12-01 | 2008-11-19 | 富士男 小澤 | 電流/電圧変換回路 |
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2007
- 2007-12-20 JP JP2007328497A patent/JP4824007B2/ja not_active Expired - Fee Related
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JP2009150762A (ja) | 2009-07-09 |
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