JP4949379B2 - プロセス制御ループ電流検査装置および方法 - Google Patents
プロセス制御ループ電流検査装置および方法 Download PDFInfo
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- JP4949379B2 JP4949379B2 JP2008504116A JP2008504116A JP4949379B2 JP 4949379 B2 JP4949379 B2 JP 4949379B2 JP 2008504116 A JP2008504116 A JP 2008504116A JP 2008504116 A JP2008504116 A JP 2008504116A JP 4949379 B2 JP4949379 B2 JP 4949379B2
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- 238000000034 method Methods 0.000 title claims description 81
- 238000004886 process control Methods 0.000 title claims description 46
- 238000007689 inspection Methods 0.000 title claims description 21
- 230000008569 process Effects 0.000 claims description 66
- 238000012360 testing method Methods 0.000 claims description 44
- 230000004044 response Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 10
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- 238000004891 communication Methods 0.000 description 6
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
- G05B19/0425—Safety, monitoring
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25189—Current mode sensor I-O, current loop, 40-mA loop instead of voltage
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25428—Field device
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Dc Digital Transmission (AREA)
- Tests Of Electronic Circuits (AREA)
- Logic Circuits (AREA)
Description
Claims (14)
- 2線プロセス制御ループにループ電流を印加するように構成されたループ電流出力回路と、
前記印加されたループ電流の誤差を検出するために前記2線プロセス制御ループに結合されたループ電流検査回路とを具備し、
前記ループ電流検査回路は、前記2線プロセス制御ループに直列結合された抵抗器と、該抵抗器の両端間の電圧降下の信号レベルに基づいて、前記印加されたループ電流の誤差を検出する誤差検出手段とを含むことを特徴とするプロセス制御ループ電流検査装置。 - 前記誤差検出手段は、前記電圧降下の信号レベルが所定の誤差レベルを超えるかどうかを検出するように構成された比較器を含む、請求項1に記載のプロセス制御ループ電流検査装置。
- 前記誤差検出手段は、前記電圧降下の信号レベルを測定するように構成されたアナログ−デジタル変換器を含む、請求項1に記載のプロセス制御ループ電流検査装置。
- 前記比較器が、前記電圧降下の信号レベルを前記所定の誤差レベルと比較し、前記比較に関連する出力を提供する請求項2に記載のプロセス制御ループ電流検査装置。
- 前記測定された信号レベルは、閾値と比較される請求項4に記載のプロセス制御ループ電流検査装置。
- 前記ループ電流の誤差に相当するドリフト出力を較正するための較正装置をさらに具備した請求項1に記載のプロセス制御ループ電流検査装置。
- 前記ループ電流の誤差に相当するドリフト出力を前記2線プロセス制御ループ上に出力する出力部をさらに具備した請求項6に記載のプロセス制御ループ電流検査装置。
- 視覚表示出力部、デジタル表示出力部または無線表示出力部をさらに含む請求項1に記載のプロセス制御ループ電流検査装置。
- 前記ループ電流が、前記検出された誤差に応答して補償される請求項1に記載のプロセス制御ループ電流検査装置。
- 2線プロセス制御ループ内のループ電流を検査する方法であって、
プロセス変数を関知し、
前記2線プロセス制御ループ内のループ電流を前記プロセス変数の関数として調整し、
前記2線プロセス制御ループ内のループ電流の誤差を、前記2線プロセス制御ループに直列結合された抵抗の両端間の電圧降下を検知することにより、検査することを含むプロセス制御ループ電流の検査方法。 - 前記抵抗の両端間の電圧降下の信号レベルが、所定の誤差レベルを超えるかどうかを検出することにより、前記検査をする請求項10に記載のプロセス制御ループ電流の検査方法。
- 前記抵抗の両端間の電圧降下の信号レベルをデジタル化することを含む、請求項10に記載のプロセス制御ループ電流の検査方法。
- 前記検査が、前記電圧降下の信号レベルを前記所定の誤差レベルと比較し、前記比較に関連する出力を提供することを含む請求項11に記載のプロセス制御ループ電流の検査方法。
- 前記検査をするステップが、マイクロプロセッサ内で少なくとも部分的に実施されることを含む請求項10に記載のプロセス制御ループ電流の検査方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/095,386 | 2005-03-31 | ||
US11/095,386 US7280048B2 (en) | 2003-08-07 | 2005-03-31 | Process control loop current verification |
PCT/US2006/009604 WO2006104712A2 (en) | 2005-03-31 | 2006-03-16 | Process control loop current verification |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008537625A JP2008537625A (ja) | 2008-09-18 |
JP4949379B2 true JP4949379B2 (ja) | 2012-06-06 |
Family
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008504116A Active JP4949379B2 (ja) | 2005-03-31 | 2006-03-16 | プロセス制御ループ電流検査装置および方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7280048B2 (ja) |
EP (1) | EP1864268B1 (ja) |
JP (1) | JP4949379B2 (ja) |
CN (1) | CN101147181B (ja) |
CA (1) | CA2599369A1 (ja) |
RU (1) | RU2413307C2 (ja) |
WO (1) | WO2006104712A2 (ja) |
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-
2005
- 2005-03-31 US US11/095,386 patent/US7280048B2/en not_active Expired - Lifetime
-
2006
- 2006-03-16 JP JP2008504116A patent/JP4949379B2/ja active Active
- 2006-03-16 EP EP06738640.9A patent/EP1864268B1/en active Active
- 2006-03-16 WO PCT/US2006/009604 patent/WO2006104712A2/en active Application Filing
- 2006-03-16 CA CA002599369A patent/CA2599369A1/en not_active Abandoned
- 2006-03-16 CN CN2006800097015A patent/CN101147181B/zh active Active
- 2006-03-16 RU RU2007140236/07A patent/RU2413307C2/ru active
Also Published As
Publication number | Publication date |
---|---|
RU2413307C2 (ru) | 2011-02-27 |
EP1864268B1 (en) | 2016-09-21 |
CN101147181A (zh) | 2008-03-19 |
WO2006104712A3 (en) | 2007-03-01 |
CN101147181B (zh) | 2012-10-31 |
CA2599369A1 (en) | 2006-10-05 |
EP1864268A2 (en) | 2007-12-12 |
US7280048B2 (en) | 2007-10-09 |
JP2008537625A (ja) | 2008-09-18 |
WO2006104712A2 (en) | 2006-10-05 |
RU2007140236A (ru) | 2009-05-10 |
US20050168343A1 (en) | 2005-08-04 |
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