WO2010043391A3 - Capacitive null-mode displacement measurement technology - Google Patents
Capacitive null-mode displacement measurement technology Download PDFInfo
- Publication number
- WO2010043391A3 WO2010043391A3 PCT/EP2009/007386 EP2009007386W WO2010043391A3 WO 2010043391 A3 WO2010043391 A3 WO 2010043391A3 EP 2009007386 W EP2009007386 W EP 2009007386W WO 2010043391 A3 WO2010043391 A3 WO 2010043391A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stationary
- displacement measurement
- measurement technology
- pairs
- linear
- 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
- G01D5/24—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 capacitance
- G01D5/2403—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 capacitance by moving plates, not forming part of the capacitor itself, e.g. shields
-
- 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
- G01D5/24—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 capacitance
- G01D5/241—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 capacitance by relative movement of capacitor electrodes
- G01D5/2412—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 capacitance by relative movement of capacitor electrodes by varying overlap
- G01D5/2415—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 capacitance by relative movement of capacitor electrodes by varying overlap adapted for encoders
-
- 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
- G01D5/24—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 capacitance
- G01D5/2405—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 capacitance by varying dielectric
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Technique for sensing the absolute position of an object, in linear or rotary displacement, relative to a stationary object or the speed of displacement, is formed, in one embodiment, by two stationary elements and a moving element able to have a linear or rotary displacement when located between the stationary elements. The stationary elements have metallic coatings on their confronted sides to form eight capacitances whose value change when the moving element is displaced between them. Four pairs of sinusoidal waveforms are injected in the metallic tracks of one stationary element by the processing electronics whose amplitude is controlled to cancel each other in the metallic tracks of the confronted stationary element. The generation of the four pairs of sinusoidal waveforms occurs in a close loop that generates coarse and fine information of the position of the moving object. Such information is offered to a user as analog or digital.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1036070A NL1036070C2 (en) | 2008-10-14 | 2008-10-14 | Capacitive null-mode displacement measurement technology. |
NL1036070 | 2008-10-14 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2010043391A2 WO2010043391A2 (en) | 2010-04-22 |
WO2010043391A3 true WO2010043391A3 (en) | 2010-10-07 |
WO2010043391A4 WO2010043391A4 (en) | 2010-12-23 |
Family
ID=40987129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/007386 WO2010043391A2 (en) | 2008-10-14 | 2009-01-12 | Capacitive null-mode displacement measurement technology |
Country Status (2)
Country | Link |
---|---|
NL (1) | NL1036070C2 (en) |
WO (1) | WO2010043391A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL3002562T3 (en) * | 2014-10-03 | 2019-10-31 | Ers Soc A Responsabilita Limitata In Liquidazione | Absolute capacitative encoder |
CN110709698B (en) * | 2017-01-26 | 2021-06-01 | 埃尼科尔股份有限公司 | Apparatus and method for measuring viscoelastic changes of a sample |
US10641597B2 (en) * | 2018-02-22 | 2020-05-05 | Bell Helicopter Textron Inc. | Method and apparatus for a precision position sensor |
DE102018209515A1 (en) * | 2018-06-14 | 2019-12-19 | BSH Hausgeräte GmbH | Method for actuating an operating device, in which at least one correction value is determined, operating device and household appliance |
CN112325756A (en) * | 2020-09-04 | 2021-02-05 | 山东休普动力科技股份有限公司 | Free piston engine rotor displacement sensor, rotor identification system and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3732553A (en) * | 1971-04-16 | 1973-05-08 | Spearhead Inc | Capacitive pick-off transducer |
US3845377A (en) * | 1972-04-20 | 1974-10-29 | Nihon Regulator Kk | Rotational angle transducer |
FR2758183A1 (en) * | 1998-01-29 | 1998-07-10 | Magneti Marelli France | Capacitive measurement appts. e.g. for angle measuring sensor or vehicle fuel gauge |
US20020014891A1 (en) * | 1997-03-21 | 2002-02-07 | Georg Brasseur | Capacitive angular displacement and angular rate sensor and measurement device for such transducer |
-
2008
- 2008-10-14 NL NL1036070A patent/NL1036070C2/en not_active IP Right Cessation
-
2009
- 2009-01-12 WO PCT/EP2009/007386 patent/WO2010043391A2/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3732553A (en) * | 1971-04-16 | 1973-05-08 | Spearhead Inc | Capacitive pick-off transducer |
US3845377A (en) * | 1972-04-20 | 1974-10-29 | Nihon Regulator Kk | Rotational angle transducer |
US20020014891A1 (en) * | 1997-03-21 | 2002-02-07 | Georg Brasseur | Capacitive angular displacement and angular rate sensor and measurement device for such transducer |
FR2758183A1 (en) * | 1998-01-29 | 1998-07-10 | Magneti Marelli France | Capacitive measurement appts. e.g. for angle measuring sensor or vehicle fuel gauge |
Also Published As
Publication number | Publication date |
---|---|
WO2010043391A4 (en) | 2010-12-23 |
WO2010043391A2 (en) | 2010-04-22 |
NL1036070C2 (en) | 2010-04-15 |
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