DE102007047839A1 - Measuring device i.e. manometer, for detecting pressure value, has evaluation unit offsetting detected fine measurement value in value representing physically adjacent measurement value with abrasive measurement value - Google Patents
Measuring device i.e. manometer, for detecting pressure value, has evaluation unit offsetting detected fine measurement value in value representing physically adjacent measurement value with abrasive measurement value Download PDFInfo
- Publication number
- DE102007047839A1 DE102007047839A1 DE200710047839 DE102007047839A DE102007047839A1 DE 102007047839 A1 DE102007047839 A1 DE 102007047839A1 DE 200710047839 DE200710047839 DE 200710047839 DE 102007047839 A DE102007047839 A DE 102007047839A DE 102007047839 A1 DE102007047839 A1 DE 102007047839A1
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- Germany
- Prior art keywords
- measuring device
- value
- measurement value
- magnet
- sensor
- 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
- 238000005259 measurement Methods 0.000 title claims abstract description 13
- 238000011156 evaluation Methods 0.000 title claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims 2
- 230000004888 barrier function Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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
- G01D5/142—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 using Hall-effect devices
- G01D5/145—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 using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Aus
der
Ferner
ist aus der Schrift
Die Erfindung betrifft ein Verfahren und ein physikalisches Messgerät, welches mit nur einem Sensor eine Bewegung eines Messglieds auswerten kann. Die Anordnung hat den Vorteil, dass der Aufbau vereinfacht ist und sich insbesondere ein niedriger Stromverbrauch erzielen lässt.The Invention relates to a method and a physical measuring device, which can evaluate a movement of a measuring element with only one sensor. The arrangement has the advantage that the structure is simplified and In particular, a low power consumption can be achieved.
Der
Sensor
Wird nun der Magnet gegenüber dieser Widerstandsanordnung verdreht, so verändert sich durch den MR-Effekt der Widerstand der einzelnen Widerstandspfade und damit gleichzeitig die Brückenspannung U/B bzw. die Halbbrückenspannung U/HB der individuellen Subkreise. Indem die einzelnen Subspannungen – alternativ die Subströme der mindestens drei anwesenden Subkreise – miteinander verrechnet werden, lässt sich ein Gesamtwert ermitteln, der die Position der Magnetachse zwischen 0 und 180° vor der Sensoranordnung anzeigt oder dafür repräsentativ ist. Auf diese Weise lässt sich die Position der Zeigerwelle im Bereich von 0 bis 180° vor der Sensoranordnung erfassen.Becomes now the magnet is twisted in relation to this resistor arrangement, The resistance of the MR changes as a result of the MR effect individual resistance paths and thus at the same time the bridge voltage U / B or the half-bridge voltage U / HB of the individual Subkreise. By the individual sub-voltages - alternatively the sub-streams of the at least three subcircles present - with each other be calculated, a total value can be determined the position of the magnetic axis between 0 and 180 ° before indicates or representative of the sensor arrangement is. In this way you can adjust the position of the pointer shaft in the range of 0 to 180 ° before the sensor array detect.
Es
kann jedoch unbekannt sein, ob sich der Zeiger
Um
diese noch fehlende Positionsinformation zu erhalten, wird erfindungsgemäß vorgeschlagen,
auf dem Sensor
Ein
zweiter Messwert entsteht durch nochmalige Messung der mindestens
drei Einzelspannungen U/B oder U/HB, wobei jedoch diesmal die Induktivität
Der Grundgedanke der Erfindung kann auf verschiedene Art und Weise in die Praxis umgesetzt werden. So können insbesondere die drei Brückenwerte zunächst in digitale Werte umgewandelt werden, die dann digital miteinander verrechnet werden, sie können aber auch analog verrechnet werden und dann in ein digitales Signal umgewandelt werden. Es ist ebenso möglich, die Brückenwerte parallel abzufragen oder diese stromsparend der Reihe nach abzutasten, wobei die Werte zur Auswertung zunächst zwischengespeichert werden. Eine Abtastung der Brückenwerte kann im Takt von 500 ms oder auch im Bereich von 7 bis 15 kHz liegen. Das Endergebnis, nämlich die Position bzw. der dem physikalischen Messwert proportionale Endinformationswert kann als digitales Signal, als Stromausgang oder Spannungsausgang bereitgestellt werden. Die Wertausgabe kann über eine Pulsweitenmodulation (Pwm), als analoge Spannung oder durch Spannung/Stromumwandlung als Signal von 4 bis 20 mA zur Verfügung gestellt werden. Das 4 bis 20 mA Signal kann aufgrund des niedrigen Stromverbrauchs des Gesamtaufbaus auch in einer einzelnen Schleife im sog. Zweileiterbetrieb bereitgestellt werden. Die Wertausgabe kann auch als Bus- oder als Frequenzausgang bereitgestellt werden.Of the The basic idea of the invention can be applied in various ways the practice will be implemented. In particular, the three bridge values first converted into digital values will be digitally billed to each other, they can but also be charged analogously and then into a digital signal being transformed. It is also possible the bridge values interrogate in parallel or scan them in order to save energy, wherein the values are initially buffered for evaluation become. A sampling of the bridge values can be performed in time with 500 ms or even in the range of 7 to 15 kHz. The end result, namely the position or the proportional to the physical value End information value can be as digital signal, as current output or voltage output can be provided. The value output can be over a pulse width modulation (Pwm), as an analog voltage or through Voltage / current conversion available as signal from 4 to 20 mA be put. The 4 to 20 mA signal may be due to the low Power consumption of the entire construction also in a single loop be provided in the so-called. Two-wire operation. The value output can also be provided as a bus or frequency output.
Das erfindungsgemäße Verfahren verwertet eine Grobinformation über die Position der Magneten gegenüber den MR-Widerständen und verwendet die Information, um den gemessenen Feinwert der Position richtig einzuordnen.The inventive method utilizes a rough information about the position of the magnets relative to the MR resistors and uses the information to calculate the measured value of the position to classify correctly.
Eine besonders günstige Lösung ist das zuvor beschriebene Überlagern von einem „positiven” und einem „negativen” Magnetfeld über die Messung des Feinwerts bei gleicher oder nahezu gleicher Zeigerposition, um aus dem Unterschied der Fein-Werte auf den Grobwert zu schließen.A particularly favorable solution is the above-described overlay from a "positive" and a "negative" magnetic field the measurement of the fine value with the same or almost the same pointer position, to deduce the difference between the fine values and the coarse value.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - US 6064197 [0001] - US 6064197 [0001]
- - WO 2004/094974 [0001] - WO 2004/094974 [0001]
- - WO 2006/043078 [0001] WO 2006/043078 [0001]
- - DE 19953190 [0001] - DE 19953190 [0001]
- - EP 0932019 [0001] - EP 0932019 [0001]
- - JP 2003315091 [0001] - JP 2003315091 [0001]
- - EP 1260787 [0002] EP 1260787 [0002]
Claims (14)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710047839 DE102007047839A1 (en) | 2007-11-21 | 2007-11-21 | Measuring device i.e. manometer, for detecting pressure value, has evaluation unit offsetting detected fine measurement value in value representing physically adjacent measurement value with abrasive measurement value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710047839 DE102007047839A1 (en) | 2007-11-21 | 2007-11-21 | Measuring device i.e. manometer, for detecting pressure value, has evaluation unit offsetting detected fine measurement value in value representing physically adjacent measurement value with abrasive measurement value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102007047839A1 true DE102007047839A1 (en) | 2009-09-10 |
Family
ID=40935929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE200710047839 Ceased DE102007047839A1 (en) | 2007-11-21 | 2007-11-21 | Measuring device i.e. manometer, for detecting pressure value, has evaluation unit offsetting detected fine measurement value in value representing physically adjacent measurement value with abrasive measurement value |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102007047839A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0932019A2 (en) | 1998-01-22 | 1999-07-28 | Cherry GmbH | Angular position sensor with rotatable selector wheel |
| US6064197A (en) | 1997-07-26 | 2000-05-16 | U.S. Philips Corporation | Angle sensor having lateral magnetic field sensor element and axial magnetic field direction measuring element for determining angular position |
| DE19953190A1 (en) | 1999-11-05 | 2001-05-23 | Bosch Gmbh Robert | Absolute and incremental rotation angle measurement, especially for automotive application, using a star-shaped GMI (giant magneto impedance effect) sensor for measurement of the changing magnetic field produced by a rotating part |
| EP1260787A1 (en) | 2001-05-21 | 2002-11-27 | ruf electronics gmbh | Angle sensor with magnetoresistive sensing elements |
| JP2003315091A (en) | 2002-04-17 | 2003-11-06 | Res Inst Electric Magnetic Alloys | Rotation angle sensor |
| WO2004094974A1 (en) | 2003-03-27 | 2004-11-04 | Dresser, Inc. | Pressure gauge having a plate for mechanically actuating a pointer and components of an inductive sensor |
| WO2006043078A1 (en) | 2004-10-23 | 2006-04-27 | Joseph William Murray | Dial indicator system |
-
2007
- 2007-11-21 DE DE200710047839 patent/DE102007047839A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6064197A (en) | 1997-07-26 | 2000-05-16 | U.S. Philips Corporation | Angle sensor having lateral magnetic field sensor element and axial magnetic field direction measuring element for determining angular position |
| EP0932019A2 (en) | 1998-01-22 | 1999-07-28 | Cherry GmbH | Angular position sensor with rotatable selector wheel |
| DE19953190A1 (en) | 1999-11-05 | 2001-05-23 | Bosch Gmbh Robert | Absolute and incremental rotation angle measurement, especially for automotive application, using a star-shaped GMI (giant magneto impedance effect) sensor for measurement of the changing magnetic field produced by a rotating part |
| EP1260787A1 (en) | 2001-05-21 | 2002-11-27 | ruf electronics gmbh | Angle sensor with magnetoresistive sensing elements |
| JP2003315091A (en) | 2002-04-17 | 2003-11-06 | Res Inst Electric Magnetic Alloys | Rotation angle sensor |
| WO2004094974A1 (en) | 2003-03-27 | 2004-11-04 | Dresser, Inc. | Pressure gauge having a plate for mechanically actuating a pointer and components of an inductive sensor |
| WO2006043078A1 (en) | 2004-10-23 | 2006-04-27 | Joseph William Murray | Dial indicator system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R012 | Request for examination validly filed |
Effective date: 20140523 |
|
| R002 | Refusal decision in examination/registration proceedings | ||
| R003 | Refusal decision now final |