JP2005300441A - タコパルス検出回路 - Google Patents
タコパルス検出回路 Download PDFInfo
- Publication number
- JP2005300441A JP2005300441A JP2004119798A JP2004119798A JP2005300441A JP 2005300441 A JP2005300441 A JP 2005300441A JP 2004119798 A JP2004119798 A JP 2004119798A JP 2004119798 A JP2004119798 A JP 2004119798A JP 2005300441 A JP2005300441 A JP 2005300441A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pulse
- tacho
- voltage
- waveform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
- F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
- F02P7/077—Circuits therefor, e.g. pulse generators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
【解決手段】 タコパルスが入力される定電圧回路11と、定電圧回路11を介して入力された各タコパルスの立ち上がりおよび立ち下がりの検出電圧を自在に設定して1つの矩形波に整形する波形整形回路12と、矩形波をCPUで処理可能な信号に変換するインターフェイス回路13とからなり、波形整形回路12の検出電圧を、各エンジン毎のタコパルスの入力波形に現れるノイズをカウントしないように設定してエンジンの回転数をカウントするものとした。
【選択図】 図2
Description
Claims (4)
- エンジン1回転毎に回転数に応じた数のタコパルスが入力され、該タコパルス1つ毎に立ち上がりおよび立ち下がりを検出してタコパルス数をカウントするタコパルス検出回路において、前記タコパルスの立ち上がりおよび立ち下がりの検出電圧の閾値を、ノイズを含むタコパルスの波形特性に応じて変更可能としたことを特徴とするタコパルス検出回路。
- 前記タコパルスが入力される定電圧回路と、前記定電圧回路を介して入力された各タコパルスの立ち上がりおよび立ち下がりの検出電圧を自在に設定して1つの矩形波に整形する波形整形回路と、前記矩形波をCPUで処理可能な信号に変換するインターフェイス回路とからなり、前記波形整形回路の前記検出電圧を、各エンジン毎のタコパルスの入力波形に現れるノイズをカウントしないように設定して前記エンジンの回転数をカウントすることを特徴とする請求項1記載のタコパルス検出回路。
- 前記定電圧回路が、抵抗とツェナーダイオードとで構成されている請求項1または2記載のタコパルス検出回路。
- 前記波形整形回路がシュミットトリガ回路からなる請求項1,2または3記載のタコパルス検出回路。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004119798A JP2005300441A (ja) | 2004-04-15 | 2004-04-15 | タコパルス検出回路 |
US10/907,435 US20050231191A1 (en) | 2004-04-15 | 2005-03-31 | Tachometer pulse detection method and circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004119798A JP2005300441A (ja) | 2004-04-15 | 2004-04-15 | タコパルス検出回路 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2005300441A true JP2005300441A (ja) | 2005-10-27 |
Family
ID=35095647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004119798A Pending JP2005300441A (ja) | 2004-04-15 | 2004-04-15 | タコパルス検出回路 |
Country Status (2)
Country | Link |
---|---|
US (1) | US20050231191A1 (ja) |
JP (1) | JP2005300441A (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009101290A (ja) * | 2007-10-23 | 2009-05-14 | Panasonic Corp | ファンフィルタユニットの制御装置 |
US8792849B2 (en) | 2009-12-25 | 2014-07-29 | Kabushiki Kaisha Toshiba | Near field radio communication apparatus and mobile radio terminal |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103807036B (zh) * | 2012-11-12 | 2016-01-20 | 第一拖拉机股份有限公司 | 高适用性电控柴油机信号发生器软件系统 |
US9772344B1 (en) * | 2013-02-20 | 2017-09-26 | The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration | Pulse generator |
US9714615B2 (en) * | 2015-01-08 | 2017-07-25 | R.J. Scheu | Ignition filter for compressed air engine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2753507A (en) * | 1955-02-28 | 1956-07-03 | Itt | Motor speed control |
JPS5975213U (ja) * | 1982-11-12 | 1984-05-22 | ダイキン工業株式会社 | 圧力式加熱調理機 |
-
2004
- 2004-04-15 JP JP2004119798A patent/JP2005300441A/ja active Pending
-
2005
- 2005-03-31 US US10/907,435 patent/US20050231191A1/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009101290A (ja) * | 2007-10-23 | 2009-05-14 | Panasonic Corp | ファンフィルタユニットの制御装置 |
US8792849B2 (en) | 2009-12-25 | 2014-07-29 | Kabushiki Kaisha Toshiba | Near field radio communication apparatus and mobile radio terminal |
Also Published As
Publication number | Publication date |
---|---|
US20050231191A1 (en) | 2005-10-20 |
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