WO2002082020A2 - Capteur de position ou de deplacement simplifie, et application - Google Patents
Capteur de position ou de deplacement simplifie, et application Download PDFInfo
- Publication number
- WO2002082020A2 WO2002082020A2 PCT/FR2002/000984 FR0200984W WO02082020A2 WO 2002082020 A2 WO2002082020 A2 WO 2002082020A2 FR 0200984 W FR0200984 W FR 0200984W WO 02082020 A2 WO02082020 A2 WO 02082020A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- detection circuit
- displacement sensor
- cursor
- sensor according
- influence
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
Definitions
- the invention relates generally to the field of geometric sensors suitable for industrial applications.
- the invention relates, according to a first of its aspects, to a position or displacement sensor, comprising a detection circuit and a cursor, the cursor being mounted mobile relative to the detection circuit and comprising a support and a member influence, the support being made of a first material, inert for the detection circuit, the influence member being carried by the support and comprising a second material, active for the detection circuit, and the detection circuit delivering an output signal as a function of a relative position of the influence member and the detection circuit.
- the influence member In this type of sensor, the influence member must, in a known manner, respect very strict dimensional tolerances, and be able to adopt a very precise reference position with respect to the detection circuit.
- the solution adopted to satisfy these constraints traditionally consists in bringing the influence organ obtained by separate production onto the support.
- the invention aims, in particular, to provide a precise position or displacement sensor, the manufacture of which is nevertheless simpler than that of known sensors.
- the senor of the invention is essentially characterized in that the influencing member is produced in the form of particles of the second material embedded in a mass of the first material. It is thus possible, in particular, to more simply produce a sensor in which : the detection circuit comprises a magnetic field generator and a magnetic field detector, and in which the influence organ operates, between the generator and the detector magnetic field, a magnetic coupling varying according to its relative position with respect to the detection circuit.
- the first material is typically a dielectric, for example a thermoplastic polymer
- the second 'material is an electrical conductor, for example a metal or an alloy.
- the cursor may include a stud enabling it to be linked on the move to a moving part by means of a yoke.
- the cursor can be obtained by molding or by injection.
- the senor of the invention can receive multiple applications, it is particularly well suited for measuring the displacement or the position of a brake system piston for a motor vehicle.
- FIG. 1 is a perspective view of a cursor belonging to a known sensor
- FIG. 2 is a perspective view of a cursor belonging to a sensor according to the invention.
- FIG. 3 is a perspective view of a sensor according to the invention, shown in combination with a master cylinder piston shown partially and cut away;
- FIG. 4 is a perspective view of a master cylinder shown in full and using a sensor according to the invention.
- the invention relates to a position or displacement sensor, of the type which includes a detection circuit 1 (FIG. 3) and a cursor 2 (FIGS. 2 and 3).
- the cursor 2 is mounted movable relative to the detection circuit 1 and comprises a support 20 and an influence member 21, the influence member 21 being carried by the support 20.
- the support 20 consists of an inert material for the detection circuit 1, while the influence member 21 consists of an active material for this detection circuit 1.
- the detection circuit 1 delivers (FIG. 3) an output signal S which is a function of the instantaneous position that the influence member 21 takes relative to the detection circuit 1, the evolution of the output signal S thus being representative of the relative movement of the cursor 2 with respect to the detection circuit 1.
- the influence member in known sensors, consists of a plate, such as a copper plate , fixed on the support 20.
- the influence member 21 is produced in the form of particles P of the active material for the detection circuit 1, these particles P being embedded in a mass
- the inert material is for example constituted by a dielectric material, such as a thermoplastic polymer.
- the cursor 2 can in particular be obtained by molding or by injection.
- the active material can in turn consist of an electrically conductive material, for example a metal or an alloy.
- the detection circuit 1 comprises a magnetic field generator and a magnetic field detector
- the influence member 21 has the function of operating, between the generator and the magnetic field detector, a magnetic coupling which varies as a function of its relative position with respect to the detection circuit 1.
- the output signal S of the detection circuit 1 is then that produced by the magnetic field detector, that is to say a signal dependent on the magnetic coupling produced by the influence member 21, and therefore ultimately dependent on the position of the latter.
- the slider 2 comprises for example a stud 200 formed on the support 20 and making it possible to ensure a kinematic connection between the slider 2 and a moving part 3 secured to a yoke 4 coming to cap the stud 200 .
- the movable part 3 is for example constituted by a piston of a master cylinder 5 for braking a motor vehicle, this piston 3 being slidably mounted in a cylinder 6 of this master- cylinder.
- the senor of the invention provides at all times, in the form of the output signal S which it delivers, a measurement of the displacement or of the position of the piston 3 inside the cylinder 6.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Position Input By Displaying (AREA)
- Braking Arrangements (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0204745-4A BR0204745A (pt) | 2001-03-23 | 2002-03-21 | Sensor simplificado de deslocamento ou de posição |
JP2002579746A JP2004525371A (ja) | 2001-03-23 | 2002-03-21 | 簡略位置又は変位センサー及びその利用方法 |
US10/475,643 US20040108851A1 (en) | 2001-03-23 | 2002-03-21 | Simplified position or displacement sensor and use thereof |
EP02722355A EP1373833A2 (fr) | 2001-03-23 | 2002-03-21 | Capteur de position ou de deplacement simplifie, et application |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR01/04054 | 2001-03-23 | ||
FR0104054A FR2822539B1 (fr) | 2001-03-23 | 2001-03-23 | Capteur de position ou de deplacement simplifie, et application |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002082020A2 true WO2002082020A2 (fr) | 2002-10-17 |
WO2002082020A3 WO2002082020A3 (fr) | 2003-01-03 |
Family
ID=8861548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/000984 WO2002082020A2 (fr) | 2001-03-23 | 2002-03-21 | Capteur de position ou de deplacement simplifie, et application |
Country Status (8)
Country | Link |
---|---|
US (1) | US20040108851A1 (fr) |
EP (1) | EP1373833A2 (fr) |
JP (1) | JP2004525371A (fr) |
KR (1) | KR20030007679A (fr) |
CN (1) | CN1636131A (fr) |
BR (1) | BR0204745A (fr) |
FR (1) | FR2822539B1 (fr) |
WO (1) | WO2002082020A2 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8997972B2 (en) * | 2012-07-27 | 2015-04-07 | Datalogic ADC, Inc. | Systems and methods for transferring items over transition gap between conveyor sections of automated checkout system |
CN106494379A (zh) * | 2016-11-04 | 2017-03-15 | 浙江力邦合信智能制动系统股份有限公司 | 一种制动助力器 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3754138A (en) * | 1971-10-07 | 1973-08-21 | Industrial Nucleonics Corp | Inner layer position measurement |
US5298903A (en) * | 1982-05-26 | 1994-03-29 | Janos William A | Synthetic dielectric material for broadband-selective absorption and reflection |
WO2000065533A1 (fr) * | 1999-04-26 | 2000-11-02 | Phoenix Ag | Dispositif pour le codage et le marquage d'objets |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4439492A (en) * | 1980-08-11 | 1984-03-27 | Asahi-Dow Limited | Injection molded articles with improved surface characteristics |
JPS6192874A (ja) * | 1984-10-13 | 1986-05-10 | Fujitsu Ltd | プリンタのキヤリツジ位置検出機構 |
-
2001
- 2001-03-23 FR FR0104054A patent/FR2822539B1/fr not_active Expired - Fee Related
-
2002
- 2002-03-21 BR BR0204745-4A patent/BR0204745A/pt not_active Application Discontinuation
- 2002-03-21 EP EP02722355A patent/EP1373833A2/fr not_active Withdrawn
- 2002-03-21 KR KR1020027015802A patent/KR20030007679A/ko not_active Application Discontinuation
- 2002-03-21 WO PCT/FR2002/000984 patent/WO2002082020A2/fr not_active Application Discontinuation
- 2002-03-21 JP JP2002579746A patent/JP2004525371A/ja not_active Withdrawn
- 2002-03-21 CN CNA028012720A patent/CN1636131A/zh active Pending
- 2002-03-21 US US10/475,643 patent/US20040108851A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3754138A (en) * | 1971-10-07 | 1973-08-21 | Industrial Nucleonics Corp | Inner layer position measurement |
US5298903A (en) * | 1982-05-26 | 1994-03-29 | Janos William A | Synthetic dielectric material for broadband-selective absorption and reflection |
WO2000065533A1 (fr) * | 1999-04-26 | 2000-11-02 | Phoenix Ag | Dispositif pour le codage et le marquage d'objets |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 270 (M-517), 13 septembre 1986 (1986-09-13) & JP 61 092874 A (FUJITSU LTD), 10 mai 1986 (1986-05-10) * |
Also Published As
Publication number | Publication date |
---|---|
CN1636131A (zh) | 2005-07-06 |
US20040108851A1 (en) | 2004-06-10 |
KR20030007679A (ko) | 2003-01-23 |
WO2002082020A3 (fr) | 2003-01-03 |
JP2004525371A (ja) | 2004-08-19 |
FR2822539B1 (fr) | 2003-08-08 |
FR2822539A1 (fr) | 2002-09-27 |
BR0204745A (pt) | 2003-06-10 |
EP1373833A2 (fr) | 2004-01-02 |
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