WO2010110028A1 - 液面検出装置 - Google Patents
液面検出装置 Download PDFInfo
- Publication number
- WO2010110028A1 WO2010110028A1 PCT/JP2010/053601 JP2010053601W WO2010110028A1 WO 2010110028 A1 WO2010110028 A1 WO 2010110028A1 JP 2010053601 W JP2010053601 W JP 2010053601W WO 2010110028 A1 WO2010110028 A1 WO 2010110028A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- case body
- liquid level
- detection device
- level detection
- detection element
- 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.)
- Ceased
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
- G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
Definitions
- the present invention relates to a liquid level detection device for detecting the amount of various liquids in a tank.
- a liquid level detection device for detecting the level of fuel or the like in a fuel tank of a vehicle or the like, for example, a float arm provided at one end with a float that moves up and down in accordance with the liquid level, A magnet that is displaced in accordance with operation, a housing that rotatably supports the other end of the float arm, a detection element such as a magnetoelectric conversion element that is provided in the housing and detects a change in magnetism of the magnet;
- the detection is formed by a circuit board that holds the detection element, a filler that protects the circuit board, a magnetic shield member that is provided so as to surround the circuit board and the magnet, the magnetic shield member, and the housing.
- Liquid level detection provided with a sealing material such as an O-ring to prevent the intrusion of the fuel or the like in a space for housing the element or the circuit board Location has been proposed (e.g., see Patent Document 1).
- the liquid level detection device has a problem that the number of parts is large, the assemblability is poor, and the cost is increased.
- the filler or the sealing material is necessary.
- the present invention pays attention to the above-described problems, and an object thereof is to provide a liquid level detection device that protects the detection element, has a small number of parts, is easy to assemble, and can reduce costs.
- a liquid surface comprising a float arm having a float that operates following the displacement of the liquid surface, a magnet that is displaced in accordance with the operation of the float arm, and a detection element that detects a magnetic change of the magnet.
- the detection apparatus includes a first case body made of a resin that covers the detection element, and a second case body made of a resin that covers the first case body.
- the first case body is formed by insert molding.
- the second case body is formed by insert molding.
- a shield case that houses the first case body and is covered by the second case body.
- the liquid level detection device of the present invention can provide a liquid level detection device that protects the detection element, has a small number of parts, is easy to assemble, and can reduce costs.
- the liquid level detection apparatus 1 includes a float arm 2, an arm holder 3, a magnet 4, a detection element 5, a circuit board 6, a lead portion 7, a first case body 8, and a second case body. 9, a shield case 10 and a frame cover 11.
- the float arm 2 includes a float 2a that operates following the displacement of the liquid level.
- the float arm 2 is made of a nonmagnetic metal, holds the float 2a at one end, and is attached to the arm holder 3 at the other end.
- the float 2a is formed of a metal material that is not easily corroded, such as stainless steel.
- the material of the float 2a is not limited to this embodiment, You may form with a synthetic resin.
- the arm holder 3 is made of a synthetic resin material and holds the float arm 2 and the magnet 4.
- the arm holder 3 holds the float arm 2 by the arm holding part 3c.
- the arm holder 3 includes a cylindrical portion 3a, and a magnet 4 is provided inside the cylindrical portion 3a.
- a cylindrical portion 3b is provided at the center of the arm holder 3, and this cylindrical portion 3b functions as a bearing that rotatably supports a later-described support shaft portion of the second case body 9.
- the arm holder 3 is rotatably supported by the second case body 9.
- a frame cover 11 is disposed on the left side of the arm holder 3 in FIG. 1 and is fixed to the second case body 9.
- the frame cover 11 functions as a bearing member that supports the columnar portion 3b of the arm holder 3 while holding the arm holder 3 in a retaining state.
- the magnet 4 rotates (displaces) together with the arm holder 3 with the operation of the float 2a.
- the magnet 4 is annular and is magnetized with two poles.
- the magnet 4 is disposed so as to face the outer periphery of a cylindrical portion described later of the second case body 9 and is disposed in the vicinity of the detection element 5.
- the magnet 4 is integrally formed by means such as insert molding simultaneously with the molding of the arm holder 3.
- the detection element 5 is composed of a magnetoelectric conversion element such as a Hall element, and detects a change in magnetism accompanying the rotation of the magnet 4 and outputs a detection signal.
- the detection element 5 may be a detection element such as an MR element.
- the detection element 5 is mechanically fixed to the circuit board 6 by leads 5a and is electrically connected.
- the circuit board 6 is made of a hard board such as glass epoxy resin.
- the circuit board 6 holds the detection element 5 and the lead part 7. Further, the detection element 5 and the energization terminal 6 are electrically connected.
- An electronic component (not shown) is mounted on the circuit board 6.
- the lead part 7 is composed of a conductor 7a having good conductivity such as copper and an insulating film 7b covering the conductor 7a.
- the conductor 7a of the lead part 7 is electrically connected to the circuit board 6 by the solder 6a.
- the lead part 7 is electrically connected to the detection element 5 via the circuit board 6.
- the first case body 8 is made of a synthetic resin, for example, a polyester-based synthetic resin, and covers the detection element 5, the circuit board 6, and a part of the lead portion 7.
- the detection element 5, the circuit board 6, and a part of the lead part 7 are covered by forming the first case body 8 by insert molding.
- the second case body 9 is made of a synthetic resin, for example, a synthetic resin such as PBT (polybutylene terephthalate) or POM (polyacetal resin), and covers the first case body 8 and the shield case 10.
- the second case body 9 does not cover the entire first case body 8, but a part of the covering portion 8 a that covers the periphery of the lead portion 7 of the first case body 8 is formed.
- the second case body 9 is exposed.
- the second case body 9 is formed by insert molding.
- the second case body 9 includes a cylindrical portion 9a.
- the cylindrical portion 9a includes a support shaft portion 9a1 that rotatably supports the arm holder 3.
- the thermal expansion coefficients of the first case body 8 and the second case body 9 are approximate and prevent peeling due to a temperature change.
- the shield case 10 is made of, for example, iron nickel and has a cup shape having a cylindrical portion 10a and a bottom portion 10b. A part of the cylindrical portion 10 a includes a notch portion 10 c for drawing out the lead portion 7 and the first case body 8 covering the lead portion 7 to the outside of the shield case 10.
- the shield case 10 is covered with the second case body 9 in a state where the first case body 8 is housed in a recess formed by the cylindrical portion 10a and the bottom portion 10b.
- the shield case 10 is formed so as to surround the magnet 4, the detection element 5, and the circuit board 6.
- the shield case 10 can block the influence of magnetism from the outside of the liquid level detection device 1, and can obtain a highly reliable and highly accurate detection output.
- the process of filling the filler and the filler is reduced. And the number of parts can be reduced. In addition, the assemblability can be improved. Therefore, it is possible to provide the liquid level detection device 1 that can reduce the cost.
- the second case body 9 compresses the first case body 8 by contraction after molding, and in particular, the lead portion 7 of the first case body 8.
- the portion covering the periphery of the lead is also compressed by the second case body 9, so that the fuel can be prevented from entering between the first case body 8 and the lead portion 7. It is possible to provide a liquid level detection device with improved sealing performance with the one case body 8.
- the shield case 10 that houses the first case body 8 and is covered with the second case body 9, the work of attaching the shield case 10 can be reduced, and the assembling property is improved. Further, by covering the shield case 10 with the second case body 9, for example, when the liquid level detection device 1 is assembled, deformation of the shield case 10 due to the liquid level detection device 1 hitting a fuel tank or the like is prevented. be able to. By preventing the deformation of the shield case 10, it is possible to prevent a change in magnetic characteristics. Furthermore, corrosion of the shield case 10 can be prevented. This is particularly effective when the fuel is alcohol or the like.
- the lead portion 7 is electrically connected to the detection element 5 via the circuit board 6, but is not limited to this embodiment, and the lead portion 7 and the detection element 5 May be directly electrically connected.
- the present invention can be used for a liquid level detection device that detects the amounts of various liquids in a tank.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
Description
シールドケース10は、円筒部10aと底部10bで形成される凹部内に、第1ケース体8を収納した状態で、第2ケース体9で覆われるものである。シールドケース10は、マグネット4と検出素子5及び回路基板6を取り巻くように形成されている。このシールドケース10によって、液面検出装置1の外部側からの磁気の影響を遮断することができ、高信頼性及び高精度の検出出力を得ることができる。
2 フロートアーム
2a フロート
4 マグネット
5 検出素子
7 リード部
8 第1ケース体
8a 被覆部
9 第2ケース体
10 シールドケース
Claims (6)
- 液面の変位に追従作動するフロートを備えたフロートアームと、前記フロートアームの作動に伴って変位するマグネットと、前記マグネットの磁気変化を検出する検出素子と、を備えた液面検出装置において、前記検出素子を覆う樹脂からなる第1ケース体と、前記第1ケース体を覆う樹脂からなる第2ケース体と、を備えたことを特徴とする液面検出装置。
- 前記第1ケース体をインサート成形によって形成したことを特徴とする請求項1に記載の液面検出装置。
- 前記第2ケース体をインサート成形によって形成したことを特徴とする請求項1に記載の液面検出装置。
- 前記第1ケース体と前記第2ケース体の膨張係数を近似としたことを特徴とする請求項1記載の液面検出装置。
- 前記第1ケース体を収納するとともに前記第2ケース体によって覆われるシールドケースを設けたことを特徴とする請求項1記載の液面検出装置。
- 前記検出素子と電気的に接続されるリード部を設け、前記第1ケース体に前記リード部を覆う被覆部を設け、前記被覆部を前記第2ケース体で覆ったことを特徴とする請求項1記載の液面検出装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010800139936A CN102365534B (zh) | 2009-03-27 | 2010-03-05 | 液面检测装置 |
| US13/260,128 US20120011931A1 (en) | 2009-03-27 | 2010-03-05 | Liquid level detection device |
| EP10755829.8A EP2413111A4 (en) | 2009-03-27 | 2010-03-05 | DEVICE FOR DETECTING THE LEVEL OF A LIQUID |
| KR1020127013162A KR101421851B1 (ko) | 2009-10-23 | 2010-10-21 | 멀티모드 무선 네트워크들에서의 페이징 수신을 위한 방법들 및 장치들 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-079238 | 2009-03-27 | ||
| JP2009079238A JP5152679B2 (ja) | 2009-03-27 | 2009-03-27 | 液面検出装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010110028A1 true WO2010110028A1 (ja) | 2010-09-30 |
Family
ID=42780721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2010/053601 Ceased WO2010110028A1 (ja) | 2009-03-27 | 2010-03-05 | 液面検出装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20120011931A1 (ja) |
| EP (1) | EP2413111A4 (ja) |
| JP (1) | JP5152679B2 (ja) |
| KR (1) | KR101639097B1 (ja) |
| CN (1) | CN102365534B (ja) |
| WO (1) | WO2010110028A1 (ja) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5825520B2 (ja) * | 2011-12-28 | 2015-12-02 | 日本精機株式会社 | 液面検出装置 |
| BR112015017752A2 (pt) * | 2013-01-24 | 2017-07-11 | Pricol Ltd | aparelho para detecção de nível sem contato |
| JP6372180B2 (ja) * | 2013-07-16 | 2018-08-15 | 株式会社デンソー | 液面検出装置 |
| DE102013215015A1 (de) * | 2013-07-31 | 2015-02-05 | Robert Bosch Gmbh | Messvorrichtung für Füllstand eines Behälters |
| JP6123578B2 (ja) * | 2013-08-27 | 2017-05-10 | 株式会社デンソー | 液面検出装置の製造方法 |
| JP6158067B2 (ja) | 2013-12-17 | 2017-07-05 | 愛三工業株式会社 | 液量検出装置及び液量検出装置を備える燃料ポンプモジュール |
| JP6336923B2 (ja) * | 2015-01-30 | 2018-06-06 | 愛三工業株式会社 | 液面検出装置 |
| JP6336924B2 (ja) * | 2015-02-04 | 2018-06-06 | 愛三工業株式会社 | 液面検出装置 |
| JP6336925B2 (ja) * | 2015-02-05 | 2018-06-06 | 愛三工業株式会社 | 液面検出装置 |
| WO2016190820A1 (en) * | 2015-05-28 | 2016-12-01 | Agency For Science, Technology And Research | Sensing device for measuring a level of an analyte, method of fabrication thereof |
| JP6534638B2 (ja) * | 2016-06-14 | 2019-06-26 | 愛三工業株式会社 | 燃料液位検出装置 |
| JP6533807B2 (ja) * | 2017-05-25 | 2019-06-19 | 矢崎総業株式会社 | 液面レベルセンサ |
| CN110678720B (zh) * | 2017-05-30 | 2021-08-31 | 日本精机株式会社 | 液面检测装置 |
| KR102761029B1 (ko) * | 2019-03-20 | 2025-01-31 | 비테스코 테크놀로지스 게엠베하 | 각도 검출 디바이스 |
| CN113831169B (zh) * | 2021-08-25 | 2022-04-15 | 北京四良科技有限公司 | 一种堆肥发酵智能检测和预警器 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007183241A (ja) * | 2005-12-07 | 2007-07-19 | Denso Corp | 液面検出装置およびその製造方法 |
| JP2007322222A (ja) | 2006-05-31 | 2007-12-13 | Nippon Seiki Co Ltd | 液面検出装置 |
| JP4125262B2 (ja) * | 2004-05-07 | 2008-07-30 | 矢崎総業株式会社 | 非接触式液面レベルセンサ |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88210731U (zh) * | 1988-01-16 | 1988-11-23 | 山东省石油公司菏泽分公司 | 油罐自动防溢装置 |
| CN2173948Y (zh) * | 1992-10-16 | 1994-08-10 | 江阴市扬子江电子仪表厂 | Jcy系列磁性液位监测器 |
| DE10326982B3 (de) * | 2003-06-12 | 2005-02-03 | Siemens Ag | Schwimmer für einen Füllstandsgeber |
| US7093485B2 (en) * | 2003-11-17 | 2006-08-22 | Nartron Corporation | Fuel level sensor |
| US7165450B2 (en) * | 2004-07-01 | 2007-01-23 | Mohammad Ali Jamnia | Variable position sensor employing magnetic flux and housing therefore |
| CN2921834Y (zh) * | 2005-09-19 | 2007-07-11 | 中国石化胜利油田有限公司河口采油厂 | 智能型大罐油水测试装置 |
| DE102006049391B4 (de) * | 2005-10-21 | 2015-02-26 | Denso Corporation | Flüssigkeitspegelerfassungsvorrichtung und Verfahren zum Herstellen derselben |
| JP4715634B2 (ja) * | 2006-05-24 | 2011-07-06 | 株式会社デンソー | 電気装置およびその製造方法 |
| JP5018326B2 (ja) * | 2007-08-09 | 2012-09-05 | 株式会社デンソー | 液面検出装置 |
-
2009
- 2009-03-27 JP JP2009079238A patent/JP5152679B2/ja not_active Expired - Fee Related
-
2010
- 2010-03-05 KR KR1020117023396A patent/KR101639097B1/ko not_active Expired - Fee Related
- 2010-03-05 US US13/260,128 patent/US20120011931A1/en not_active Abandoned
- 2010-03-05 WO PCT/JP2010/053601 patent/WO2010110028A1/ja not_active Ceased
- 2010-03-05 CN CN2010800139936A patent/CN102365534B/zh not_active Expired - Fee Related
- 2010-03-05 EP EP10755829.8A patent/EP2413111A4/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4125262B2 (ja) * | 2004-05-07 | 2008-07-30 | 矢崎総業株式会社 | 非接触式液面レベルセンサ |
| JP2007183241A (ja) * | 2005-12-07 | 2007-07-19 | Denso Corp | 液面検出装置およびその製造方法 |
| JP2007322222A (ja) | 2006-05-31 | 2007-12-13 | Nippon Seiki Co Ltd | 液面検出装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2413111A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2413111A4 (en) | 2016-11-02 |
| EP2413111A1 (en) | 2012-02-01 |
| KR20110137342A (ko) | 2011-12-22 |
| CN102365534B (zh) | 2013-07-03 |
| JP5152679B2 (ja) | 2013-02-27 |
| KR101639097B1 (ko) | 2016-07-12 |
| JP2010230537A (ja) | 2010-10-14 |
| US20120011931A1 (en) | 2012-01-19 |
| CN102365534A (zh) | 2012-02-29 |
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