JP4643243B2 - オイルチェックセンサ - Google Patents
オイルチェックセンサ Download PDFInfo
- Publication number
- JP4643243B2 JP4643243B2 JP2004360271A JP2004360271A JP4643243B2 JP 4643243 B2 JP4643243 B2 JP 4643243B2 JP 2004360271 A JP2004360271 A JP 2004360271A JP 2004360271 A JP2004360271 A JP 2004360271A JP 4643243 B2 JP4643243 B2 JP 4643243B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- electrodes
- oil
- conductor
- output
- 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.)
- Expired - Fee Related
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- 239000004020 conductor Substances 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 20
- 239000003921 oil Substances 0.000 description 44
- 230000007423 decrease Effects 0.000 description 11
- 238000011109 contamination Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2888—Lubricating oil characteristics, e.g. deterioration
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Biochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
2 ナット
3 ヘッドカバー
3a 孔
4 センサヘッド部
5 棒状部材
6 保持部材
7 永久磁石
8 絶縁カバー
9、10 電極
11 止め輪
12 遮蔽部材
20 電気回路
21 演算増幅器
22 出力端
Ra、Rb、Rc、Rd 固定抵抗
Va、Vb、Vo、Vs 電圧
Claims (3)
- オイル浴中に挿入される棒状部材の先端部外周に磁石を設け、この磁石の外周側に軸方向で間隔を開けて互いに対向する電極を設けて、これらの対向する電極の少なくとも一方を複数の導電体で形成し、これらの導電体の対向する電極との短絡個数を測定して、前記オイル浴中の金属粉量を検出するオイルチェックセンサにおいて、前記導電体で形成した複数の電極のいずれかと前記対向する電極間の電気抵抗が所定の閾値よりも小さくなったときに、この電気抵抗が閾値より小さくなったという一定の電圧を出力するようにしたことを特徴とするオイルチェックセンサ。
- 前記電気抵抗が閾値より小さくなった電極間を、電気回路を用いて一定の電圧を出力するようにした請求項1に記載のオイルチェックセンサ。
- 前記電気抵抗が閾値より小さくなったときに一定の電圧を出力する電気回路が、前記導電体で形成した電極を前記所定の閾値の固定抵抗を介して電源電圧に接続し、この電源電圧に接続された導電体で形成した電極の電圧と所定の基準電圧とを演算増幅器に入力し、この演算増幅器の出力を所定の固定抵抗を介して前記基準電圧の入力側へ返し、前記導電体で形成した電極の入力電圧が前記基準電圧の入力側の電圧よりも低くなったときに、前記演算増幅器が一定の電圧を出力するものである請求項2に記載のオイルチェックセンサ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004360271A JP4643243B2 (ja) | 2004-12-13 | 2004-12-13 | オイルチェックセンサ |
US11/260,289 US7112973B2 (en) | 2004-12-13 | 2005-10-28 | Oil condition sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004360271A JP4643243B2 (ja) | 2004-12-13 | 2004-12-13 | オイルチェックセンサ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006170667A JP2006170667A (ja) | 2006-06-29 |
JP4643243B2 true JP4643243B2 (ja) | 2011-03-02 |
Family
ID=36583060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004360271A Expired - Fee Related JP4643243B2 (ja) | 2004-12-13 | 2004-12-13 | オイルチェックセンサ |
Country Status (2)
Country | Link |
---|---|
US (1) | US7112973B2 (ja) |
JP (1) | JP4643243B2 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200340936A1 (en) * | 2019-04-26 | 2020-10-29 | Nabtesco Corporation | Sensor |
US20220178857A1 (en) * | 2019-04-26 | 2022-06-09 | Nabtesco Corporation | Sensor |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4711723B2 (ja) * | 2005-04-18 | 2011-06-29 | Ntn株式会社 | オイルチェックセンサ |
DE102008024616A1 (de) * | 2008-05-21 | 2009-11-26 | Manroland Ag | Verfahren zum Betreiben einer Druckmaschine |
DE102012219242A1 (de) | 2012-10-22 | 2014-04-24 | Rolls-Royce Deutschland Ltd & Co Kg | Messvorrichtung und -verfahren zur Detektierung ferromagnetischer Partikel |
EP3407483B1 (en) * | 2016-01-18 | 2023-10-11 | Hitachi Astemo, Ltd. | Direct current sensor, alternating current sensor, and inverter comprising same |
WO2017156127A1 (en) * | 2016-03-11 | 2017-09-14 | Qorvo Us, Inc. | Baw sensor fluidic device with increased dynamic measurement range |
US10705039B2 (en) * | 2017-03-27 | 2020-07-07 | Nabtesco Corporation | Sensor for detecting magnetic powders in a lubricant |
US10866201B2 (en) * | 2017-11-29 | 2020-12-15 | Pratt & Whitney Canada Corp. | Lubricant debris monitoring system for gas turbine engine |
JP7101486B2 (ja) * | 2018-01-26 | 2022-07-15 | ナブテスコ株式会社 | センサ |
US20200057044A1 (en) * | 2018-08-20 | 2020-02-20 | Nabtesco Corporation | Industrial device including sensor |
JP2021076386A (ja) * | 2019-11-05 | 2021-05-20 | ナブテスコ株式会社 | センサ |
CN114859021B (zh) * | 2022-05-13 | 2023-10-03 | 江苏徐工工程机械研究院有限公司 | 一种润滑油污染度传感器的校准方法及装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001124764A (ja) * | 1999-10-28 | 2001-05-11 | Ntn Corp | オイルチェックセンサー |
JP2002286697A (ja) * | 2001-03-22 | 2002-10-03 | Ntn Corp | オイルチェックセンサ |
JP2002310967A (ja) * | 2001-04-06 | 2002-10-23 | Komatsu Ltd | 導電体検出装置 |
JP2005274486A (ja) * | 2004-03-26 | 2005-10-06 | Ntn Corp | オイルチェックセンサ |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4323843A (en) * | 1978-12-06 | 1982-04-06 | Batham Ian N | Magnetic contamination detector |
JPS61135251U (ja) * | 1985-02-12 | 1986-08-23 | ||
JPS61195461U (ja) * | 1985-05-27 | 1986-12-05 | ||
JP3094170B2 (ja) * | 1991-03-27 | 2000-10-03 | 株式会社小松製作所 | 金属粒子検出センサの電極構造 |
US5614830A (en) * | 1991-12-11 | 1997-03-25 | Computational Systems, Inc. | Oil monitor with magnetic field |
US6377052B1 (en) * | 1999-11-03 | 2002-04-23 | Eaton Corporation | Monitoring fluid condition through an aperture |
JP3988363B2 (ja) * | 2000-07-13 | 2007-10-10 | 株式会社ジェイテクト | 動圧軸受の評価方法 |
US6803775B2 (en) * | 2002-09-25 | 2004-10-12 | Delphi Technologies, Inc. | Fuel quality sensor assembly and method of use |
-
2004
- 2004-12-13 JP JP2004360271A patent/JP4643243B2/ja not_active Expired - Fee Related
-
2005
- 2005-10-28 US US11/260,289 patent/US7112973B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001124764A (ja) * | 1999-10-28 | 2001-05-11 | Ntn Corp | オイルチェックセンサー |
JP2002286697A (ja) * | 2001-03-22 | 2002-10-03 | Ntn Corp | オイルチェックセンサ |
JP2002310967A (ja) * | 2001-04-06 | 2002-10-23 | Komatsu Ltd | 導電体検出装置 |
JP2005274486A (ja) * | 2004-03-26 | 2005-10-06 | Ntn Corp | オイルチェックセンサ |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200340936A1 (en) * | 2019-04-26 | 2020-10-29 | Nabtesco Corporation | Sensor |
US20220178857A1 (en) * | 2019-04-26 | 2022-06-09 | Nabtesco Corporation | Sensor |
US11499931B2 (en) * | 2019-04-26 | 2022-11-15 | Nabtesco Corporation | Sensor |
US20230035518A1 (en) * | 2019-04-26 | 2023-02-02 | Nabtesco Corporation | Sensor |
US12038400B2 (en) | 2019-04-26 | 2024-07-16 | Nabtesco Corporation | Sensor |
Also Published As
Publication number | Publication date |
---|---|
US20060125487A1 (en) | 2006-06-15 |
US7112973B2 (en) | 2006-09-26 |
JP2006170667A (ja) | 2006-06-29 |
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