JP2005091235A - 電荷信号変換アンプ - Google Patents
電荷信号変換アンプ Download PDFInfo
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- JP2005091235A JP2005091235A JP2003326821A JP2003326821A JP2005091235A JP 2005091235 A JP2005091235 A JP 2005091235A JP 2003326821 A JP2003326821 A JP 2003326821A JP 2003326821 A JP2003326821 A JP 2003326821A JP 2005091235 A JP2005091235 A JP 2005091235A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 69
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- 230000008859 change Effects 0.000 claims description 14
- 230000008054 signal transmission Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 230000005669 field effect Effects 0.000 abstract description 46
- 239000003990 capacitor Substances 0.000 abstract description 33
- 238000012545 processing Methods 0.000 abstract description 7
- 238000002485 combustion reaction Methods 0.000 description 29
- 238000010586 diagram Methods 0.000 description 12
- 230000005856 abnormality Effects 0.000 description 10
- 230000007423 decrease Effects 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
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- 238000004458 analytical method Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009838 combustion analysis Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
- G01L23/222—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines using piezoelectric devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
- G01L23/10—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by pressure-sensitive members of the piezoelectric type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/08—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor
- G01L9/085—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor with temperature compensating means
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
- Measuring Fluid Pressure (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
【解決手段】センサ素子の正の電荷が電圧変換用キャパシタCxに蓄電され、アンプA1で正の電圧に変換されて出力される。一方、センサ素子の電荷の極性が負に反転して電圧変換用キャパシタCxから逆流してキャパシタCpに帰還し、アンプA1の出力が低下して零点に戻るとき、自動補正回路3により電界効果型トランジスタQ1が導通されて電荷が放電され、アンプA1の入力が“0”になるように補正される。これにより、電荷の漏洩による負のドリフトや温度変化による正のドリフトに起因する零点レベルの変動を防止することができ、信号処理に要する演算負荷を軽減することができる。
【選択図】図1
Description
V0=(1+R2/R1)q/(Cc+Cs+Cx+Cds+Cdg)…(1)
アンプA1の入力が上昇すると、アンプA1の出力が上昇し、アンプA2の出力(電界効果型トランジスタQ1のゲート電圧)が低下する。更に圧力が上昇すると、アンプA2の出力がゼロとなり、自動補正回路3による補正が終了する。尚、このとき、電界効果型トランジスタQ1のドレイン・ゲート間容量Cdgに蓄えられた電荷が一部入力と相殺され、この入力との相殺がゲート電圧が“0”になるまで続く。結果として、アンプA1は、入力の立ち上がり時に出力が圧縮される。この圧縮量は、ドレイン・ゲート間容量Cdgとスレッシホルド電圧Vthにより決まる。従って、半導体スイッチとしての電界効果型トランジスタQ1には、ドレイン・ゲート間容量Cdgが小さいものを使用することが望ましい。
電荷がリークすると、この場合、正の方向へ向かうことになるので、同様に、アンプA1の出力が上昇し、アンプA2の出力が減少する。但し、電荷がリークした結果、入力が正の領域に達しないとバランス状態からは抜け出ない。
2 信号変換回路
3,3A,3B,3C,3D 自動補正回路
代理人 弁理士 伊 藤 進
Claims (3)
- 検出対象の作用によって電荷を発生するセンサからの電荷信号を電圧信号に変換して出力する信号変換回路と、
信号伝達系で発生する電荷の漏洩による負方向のドリフトと温度変化による正方向のドリフトとを自動的に補正し、上記信号変換回路の出力レベルを上記センサの電荷発生開始時及び終了時において同一レベルとする自動補正回路とを備えたことを特徴とする電荷信号変換アンプ。 - 上記自動補正回路は、
上記信号変換回路の入力側の電荷を放電して上記ドリフトを補正し、上記信号変換回路の出力レベルを上記センサの電荷発生開始時及び終了時において同一レベルとすることを特徴とする請求項1記載の電荷信号変換アンプ。 - 上記自動補正回路は、
上記信号変換回路の出力がピーク値から下降し、正方向の最大ドリフト量を考慮して予め設定したレベル以下になったとき、上記信号変換回路の入力側の電荷を放電して上記正方向のドリフトを補正し、上記信号変換回路の出力が零点を定める基準レベル以下になったとき、上記信号変換回路の入力側の電荷を放電して上記負方向のドリフトを補正することを特徴とする請求項2記載の電荷信号変換アンプ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003326821A JP4387738B2 (ja) | 2003-09-18 | 2003-09-18 | 電荷信号変換アンプ |
EP04021961A EP1517127B1 (en) | 2003-09-18 | 2004-09-15 | Charge signal converting amplifier |
US10/943,569 US7142034B2 (en) | 2003-09-18 | 2004-09-17 | Charge signal converting amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003326821A JP4387738B2 (ja) | 2003-09-18 | 2003-09-18 | 電荷信号変換アンプ |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005091235A true JP2005091235A (ja) | 2005-04-07 |
JP2005091235A5 JP2005091235A5 (ja) | 2006-10-19 |
JP4387738B2 JP4387738B2 (ja) | 2009-12-24 |
Family
ID=34191359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003326821A Expired - Fee Related JP4387738B2 (ja) | 2003-09-18 | 2003-09-18 | 電荷信号変換アンプ |
Country Status (3)
Country | Link |
---|---|
US (1) | US7142034B2 (ja) |
EP (1) | EP1517127B1 (ja) |
JP (1) | JP4387738B2 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009229328A (ja) * | 2008-03-25 | 2009-10-08 | Ngk Spark Plug Co Ltd | 筒内圧センサの出力補正装置及びこれを備えた筒内圧検出装置 |
JP2009229329A (ja) * | 2008-03-25 | 2009-10-08 | Ngk Spark Plug Co Ltd | 筒内圧センサの出力補正装置及びこれを備えた筒内圧検出装置 |
JP2016513312A (ja) * | 2013-01-30 | 2016-05-12 | ポール スミス デイビッド | 可変感触及び保持フィードバック、自動化較正、及び学習可能な性能最適化を伴う操作者制御型電気出力信号装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4309158B2 (ja) * | 2003-03-19 | 2009-08-05 | 富士重工業株式会社 | 電荷信号変換アンプ、及び筒内圧測定装置 |
JP4334959B2 (ja) * | 2003-09-19 | 2009-09-30 | 富士重工業株式会社 | 多気筒エンジンの燃焼圧データ収集システム |
TWI396367B (zh) * | 2008-12-16 | 2013-05-11 | Green Solution Tech Co Ltd | 具有噪音防止之轉換電路及轉換控制器 |
DE102012207291A1 (de) * | 2012-05-02 | 2013-11-07 | Robert Bosch Gmbh | Verfahren zur Bestimmung eines Offsets eines Ausgangssignales einer, in einem Sensor integrierten Auswerteschaltung, vorzugsweise eines in einem Brennraum einer Brennkraftmaschine verbauten Drucksensors und ein Sensor |
KR20220116290A (ko) * | 2020-01-24 | 2022-08-22 | 가부시키가이샤 리코 | 센서 소자 및 센서 시스템 |
CN115021696B (zh) * | 2022-08-02 | 2023-06-27 | 宁波中车时代传感技术有限公司 | 一种电荷放大器电路及振动传感器 |
Family Cites Families (12)
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US3434062A (en) * | 1965-06-21 | 1969-03-18 | James R Cox | Drift detector |
GB2149248B (en) * | 1983-10-27 | 1987-04-08 | Secr Defence | Offset compensation of amplifiers |
DE3684020D1 (de) * | 1986-07-18 | 1992-04-02 | Kistler Instrumente Ag | Ladungsverstaerkerschaltung. |
KR920006455B1 (ko) * | 1988-02-22 | 1992-08-06 | 미쓰비시전기주식회사 | 내연기관의 실린더내 압력검출장치 |
US4806875A (en) * | 1988-05-11 | 1989-02-21 | Maxim Integrated Products | Precision operational amplifier |
JP3123798B2 (ja) | 1991-12-24 | 2001-01-15 | 日本特殊陶業株式会社 | 圧力検知装置 |
DE19506133B4 (de) * | 1994-03-04 | 2004-05-27 | Volkswagen Ag | Vorrichtung zur Erfassung des Brennrauminnendruckes mindestens eines Zylinders einer Verbrennungskraftmaschine |
US5563587A (en) * | 1994-03-21 | 1996-10-08 | Rosemount Inc. | Current cancellation circuit |
US6426663B1 (en) * | 1996-03-04 | 2002-07-30 | Delphi Technologies, Inc. | Analog/digital feedback circuitry for minimizing DC offset variations in an analog signal |
US6952130B2 (en) * | 2002-12-31 | 2005-10-04 | Texas Instruments Incorporated | Compensation of offset drift with temperature for operational amplifiers |
JP4309158B2 (ja) * | 2003-03-19 | 2009-08-05 | 富士重工業株式会社 | 電荷信号変換アンプ、及び筒内圧測定装置 |
JP4094475B2 (ja) * | 2003-04-21 | 2008-06-04 | 富士重工業株式会社 | 多気筒エンジンの燃焼圧データ収集システム |
-
2003
- 2003-09-18 JP JP2003326821A patent/JP4387738B2/ja not_active Expired - Fee Related
-
2004
- 2004-09-15 EP EP04021961A patent/EP1517127B1/en not_active Expired - Fee Related
- 2004-09-17 US US10/943,569 patent/US7142034B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009229328A (ja) * | 2008-03-25 | 2009-10-08 | Ngk Spark Plug Co Ltd | 筒内圧センサの出力補正装置及びこれを備えた筒内圧検出装置 |
JP2009229329A (ja) * | 2008-03-25 | 2009-10-08 | Ngk Spark Plug Co Ltd | 筒内圧センサの出力補正装置及びこれを備えた筒内圧検出装置 |
JP2016513312A (ja) * | 2013-01-30 | 2016-05-12 | ポール スミス デイビッド | 可変感触及び保持フィードバック、自動化較正、及び学習可能な性能最適化を伴う操作者制御型電気出力信号装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1517127B1 (en) | 2011-05-25 |
EP1517127A3 (en) | 2009-03-25 |
US20050062514A1 (en) | 2005-03-24 |
US7142034B2 (en) | 2006-11-28 |
JP4387738B2 (ja) | 2009-12-24 |
EP1517127A2 (en) | 2005-03-23 |
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