WO1998037386A1 - Verfahren zum einstellen von schaltpunkten bei einem sensor-ausgangssignal - Google Patents
Verfahren zum einstellen von schaltpunkten bei einem sensor-ausgangssignalInfo
- Publication number
- WO1998037386A1 WO1998037386A1 PCT/DE1998/000511 DE9800511W WO9837386A1 WO 1998037386 A1 WO1998037386 A1 WO 1998037386A1 DE 9800511 W DE9800511 W DE 9800511W WO 9837386 A1 WO9837386 A1 WO 9837386A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- output signal
- signal
- sensor
- switching points
- offset
- 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
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
-
- 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
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
- G01D18/001—Calibrating 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
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
- G01D18/002—Automatic recalibration
- G01D18/004—Continuous recalibration
-
- 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
- G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24471—Error correction
- G01D5/2448—Correction of gain, threshold, offset or phase control
-
- 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
- G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24471—Error correction
- G01D5/2449—Error correction using hard-stored calibration data
Definitions
- the present invention relates to a method for setting switching points of a system controlled by a sensor arrangement with any fixed ratio between the signal peaks of the output signal of a sensor.
- sensors are used to detect the movement or the positional state of rotating parts. Examples include crankshaft, camshaft, transmission and ABS sensors in automobiles.
- Hall sensors which sense the change in a magnetic field are preferably used as such sensors.
- a permanent magnet is attached to a stationary part in order to generate a magnetic field.
- This magnetic field is then modulated by a gear or another ferromagnetic sensor that is attached to the rotating part, depending on the position.
- the Hall sensor is preferably located between the permanent magnet and the gear or encoder and can thus detect fluctuations in the magnetic field. For example, if a tooth of the gearwheel lies in the magnetic field, a "high" output signal is provided, while a gap between the teeth results in a "low” output signal. In this way, the position or position of a rotating part can be inferred from the signal emitted by the Hall sensor.
- the signal supplied by a sensor is significantly influenced by the operating conditions under which the sensor is used. These operating conditions include unavoidable uncertainties such as Working temperature or size of the air gap, etc. Despite the fluctuations caused by the operating conditions, the sensor should deliver an output signal that is as well defined as possible. This means that the output signal should have a well-defined course regardless of the fluctuations caused by the operating conditions. The reason for this is the following:
- a sensor arrangement supplies a sinusoidal signal
- a well-defined behavior of a system controlled by the sensor arrangement can be obtained if switching operations in the system which depend on the output signal of the sensor are carried out in the zero crossings of this signal. This is because these zero crossings are independent of the respective signal amplitude and also have a large slope.
- a switch point other than a zero crossing or the signal center may also be advantageous for other signal forms of the output signal of the sensor.
- Packaging recipes "describes a sensor arrangement in which the amplitude of the output signal of a sensor is first standardized using an analog / digital (A / D) converter, if necessary. Then two further A / D and D / A converters are used a switching threshold is then derived and determined from this System behavior can be achieved, which is essentially independent of temperature fluctuations and the width of the air gap.
- a / D analog / digital
- DE 32 01 811 AI describes a device for detecting speed, angle, position and the like.
- the signal from a sensor is fed to switching means which monitor the amplitude and / or amplitude fluctuations.
- the amplitude is detected by a peak value meter and fed to a threshold value stage.
- This marks a permissible range for fluctuations in the signal amplitude. If this range is not observed, the signal from the sensor is switched off, so that it is ensured that no corrupted signals are output.
- the signal output by the sensor is not corrected, i.e. there is no reaction from the threshold value stage to the output signal, in other words, the output signal is only passively monitored.
- the switching points should be maintained regardless of the amplitude of the output signal.
- Output circuit set with an offset D / A converter while with a detector circuit consisting of a current divider and a current mirror signal peaks of the output signal of the sensor are detected and a predetermined switching point is set by means of resistors.
- predetermined switching points remain constant regardless of the amplitude of the output signal and thus, for example, regardless of the width of the air gap.
- a calibration logic is located between the offset D / A converter and the detector circuit and is controlled by comparators, to which the output signals of the current divider and the current mirror on the one hand and the output signal of the sensor on the other hand are fed.
- the switching points are preferably set to the zero crossings of the output signal.
- This process variant has the advantage of a large slope at the switching points.
- the method according to the invention is extremely simple, additional sources of error, such as those caused by additional intermediate switching means, such as a PGA, being excluded.
- Fig. 1 is a block diagram of the self-calibrating
- Fig. 2 is a schematic representation of how the method according to the invention works.
- a Hall probe 1 feeds an output signal to an output circuit 3 via an amplifier 2, in which there is a resistor R1, which converts a current output as an output signal into a voltage.
- R1 a resistor
- a voltage output is supplied as an output signal to a voltage summing amplifier.
- an output signal is output at an output connection 4 via a first comparator K 1, which is preferably equipped with hysteresis for reasons of interference suppression.
- the offset or the offset of the output signal of the amplifier 2 is set such that the predetermined switching point is exactly at a reference voltage, for example ground, comes to rest.
- This predetermined switching point that is to say, for example, the signal center, as was explained at the beginning, is set by means of a voltage divider composed of resistors R2 and R3. This ensures that the switching point is independent of the
- the circuit structure of the output circuit 3 is extremely simple, so that additional sources of error, for example causing noise or signal distortion, are largely excluded.
- the output signal of the Hall probe 1 or the amplifier 2 is tapped via a line 7 in the output circuit 3 and fed to the inputs of comparators K2 and K3, at the other inputs of which voltages ref + and ref- of one
- Auxiliary transistor circuit consisting of a current divider and a current mirror 8. The same currents are therefore fed into the resistors R2 and R3. With the aid of the ratio of the resistance values of the resistors R2 and R3, a reference potential can then be set for any ratio between the voltages ref + and ref-. If, for example, the resistance values of the resistors R2 and R3 and as the currents 12 and 13 flowing there are the same size, the voltages ref + and ref- are symmetrical about the reference potential, which in the present case is ground. The switching point is then in the middle of the signal.
- the current divider or current mirror also has transistors 9, 10, 11, 12, the base of transistor 9 being biased and the emitters of transistors 11 and 12 being connected to a voltage source.
- the calibration logic 6 now works in the following way:
- the position of the voltages ref + and ref- is such that they reflect the signal peaks of the output signal of the amplifier 2 in the output circuit 3.
- the offset of the output signal is regulated so that the excellent switching point comes to lie exactly at the reference potential, for example ground.
- the reference potential ref 0 is set in the middle of the two voltages ref + and ref-.
- the output signal 1 is large, the voltages ref + and ref- are brought out to the signal peaks, as indicated by the large arrows.
- the voltages ref + and ref- are brought inwards to the signal peaks, as the small arrows illustrate.
- any changes in the gain adaptation that is to say in the gain D / A converter 13, have no influence on the switching point, since this signal path is decoupled from this. This ensures good reproducibility of the output signal, which is particularly important for crankshaft sensors.
- the clock for the calibration logic 6 can be derived from the output signal in the output circuit 3. This is possible if it is assumed that the sensor arrangement as a whole is calibrated, or at least the start values of the sensor arrangement lead to a regular, if not exact, function. If necessary, an auxiliary clock can be supplied in a start phase, which shifts the offset from the offset D / A converter until a signal appears at output circuit 3, after which a switch is made to "normal” operation. This enables start-up even with relatively unfavorable starting values.
- a parallel path can be provided to the output circuit 3, which defines the behavior in the uncalibrated state.
- it can also be considered to store calibration values once determined in a permanent memory, such as an EEPROM or a fuse, and then to use these values when the sensor arrangement is restarted in the uncalibrated case.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98914792A EP1095242A1 (de) | 1997-02-24 | 1998-02-20 | Verfahren zum einstellen von schaltpunkten bei einem sensor-ausgangssignal |
KR1019980708636A KR20000065066A (ko) | 1997-02-24 | 1998-02-20 | 센서 출력 신호가 존재할 때 스위칭 점을 세팅하기 위한 방법 |
JP10536157A JP3011774B2 (ja) | 1997-02-24 | 1998-02-20 | センサ出力信号における切換点を設定するための方法 |
US09/178,705 US6279375B1 (en) | 1997-02-24 | 1998-10-26 | Method of setting switching points for a sensor output signal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19707263.1 | 1997-02-24 | ||
DE19707263A DE19707263B4 (de) | 1997-02-24 | 1997-02-24 | Verfahren zum Einstellen von Schaltpunkten bei einem Sensor-Ausgangssignal |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/178,705 Continuation US6279375B1 (en) | 1997-02-24 | 1998-10-26 | Method of setting switching points for a sensor output signal |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998037386A1 true WO1998037386A1 (de) | 1998-08-27 |
Family
ID=7821262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000511 WO1998037386A1 (de) | 1997-02-24 | 1998-02-20 | Verfahren zum einstellen von schaltpunkten bei einem sensor-ausgangssignal |
Country Status (7)
Country | Link |
---|---|
US (1) | US6279375B1 (de) |
EP (1) | EP1095242A1 (de) |
JP (1) | JP3011774B2 (de) |
KR (1) | KR20000065066A (de) |
CN (1) | CN1217786A (de) |
DE (1) | DE19707263B4 (de) |
WO (1) | WO1998037386A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1076224A2 (de) * | 1999-08-09 | 2001-02-14 | Mannesmann VDO Aktiengesellschaft | Selbstadaptiver Sensor |
US9746345B2 (en) | 2014-10-17 | 2017-08-29 | Tdk-Micronas Gmbh | Apparatus and method for determining a rotation angle of a rotor |
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DE10004080C1 (de) | 2000-01-31 | 2001-09-06 | Infineon Technologies Ag | Sensorvorrichtung und Verfahren zur Erzeugung eines Ausgangssignals einer Sensorvorrichtung |
DE10064859A1 (de) * | 2000-12-23 | 2002-07-04 | Maz Mikroelektronik Anwendungs | Sensor mit Hilfssensor zur Selbstkalibrierung |
DE10159336B4 (de) * | 2001-05-24 | 2004-08-05 | Sie Elektronik Industrie-Elektronik Gmbh | Verfahren zur Selbstjustierung eines Sensors sowie selbstjustierender Sensor |
DE10154642C1 (de) * | 2001-11-07 | 2003-07-17 | Siemens Ag | Auswerteschaltung für einen induktiven Sensor |
FR2842595B1 (fr) * | 2002-07-16 | 2004-08-27 | Commissariat Energie Atomique | Procede de maintenance de capteur de mesures et detecteur pour la mise en oeuvre du procede |
DE10252827B3 (de) | 2002-11-13 | 2004-08-05 | Siemens Ag | Schaltungsanordnung zur schnellen Ansteuerung insbesondere induktiver Lasten |
US6919651B2 (en) | 2002-11-26 | 2005-07-19 | Siemens Aktiengesellschaft | Circuit arrangement for high-speed switching of inductive loads |
DE102004039463A1 (de) * | 2004-08-14 | 2006-02-23 | Hella Kgaa Hueck & Co. | Sensor und Verfahren zur Kalibrierung eines Sensors |
FR2876455B1 (fr) | 2004-10-13 | 2007-01-05 | Siemens Vdo Automotive Sas | Procede et dispositif de traitement des signaux de mesures issus d'un capteur de deplacement embarque sur un vehicule automobile |
JP4568141B2 (ja) * | 2005-02-23 | 2010-10-27 | 株式会社東芝 | 校正システム |
DE102006005835A1 (de) * | 2006-02-08 | 2007-08-16 | Logicdata Electronic & Software Entwicklungs Gmbh | Schaltungsanordnung und Verfahren zur Kalibrierung einer Sensoranordnung, insbesondere für motorisch verstellbare Möbel, sowie Messverstärker und Sensoranordnung |
EP1876502A1 (de) * | 2006-07-05 | 2008-01-09 | Siemens Aktiengesellschaft | Kalibrierbare Baugruppe |
US8072208B2 (en) * | 2008-05-30 | 2011-12-06 | Infineon Technologies Ag | Integrated circuit with tracking logic |
EP2629059A1 (de) * | 2011-05-16 | 2013-08-21 | Wireless Maingate Nordic AB | Energieüberwachungsvorrichtung |
US8590361B1 (en) * | 2012-01-27 | 2013-11-26 | Onicon, Inc. | Magnetic flow meters with automatic field maintenance |
US9638548B2 (en) | 2012-05-07 | 2017-05-02 | Infineon Technologies Ag | Output switching systems and methods for magnetic field sensors |
WO2014198344A1 (en) * | 2013-06-14 | 2014-12-18 | Aktiebolaget Skf | A method for dynamic normalization of analogue sine and cosine signals, a sensor or a sensor bearing unit and a mechanical device |
US10102992B2 (en) | 2014-02-25 | 2018-10-16 | Infineon Technologies Ag | Switching apparatus, switching system and switching method |
CN114485764B (zh) * | 2022-02-16 | 2023-08-01 | 中国核动力研究设计院 | 一种微弱信号测量的自校准和抗漂移装置 |
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DE19600803A1 (de) * | 1995-01-12 | 1996-07-18 | Nippon Denso Co | Sensorsignal-Prozessor |
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-
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- 1998-02-20 WO PCT/DE1998/000511 patent/WO1998037386A1/de not_active Application Discontinuation
- 1998-02-20 EP EP98914792A patent/EP1095242A1/de not_active Withdrawn
- 1998-02-20 CN CN199898800180A patent/CN1217786A/zh active Pending
- 1998-02-20 KR KR1019980708636A patent/KR20000065066A/ko not_active Application Discontinuation
- 1998-10-26 US US09/178,705 patent/US6279375B1/en not_active Expired - Lifetime
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1076224A2 (de) * | 1999-08-09 | 2001-02-14 | Mannesmann VDO Aktiengesellschaft | Selbstadaptiver Sensor |
EP1076224A3 (de) * | 1999-08-09 | 2005-08-10 | Siemens Aktiengesellschaft | Selbstadaptiver Sensor |
US9746345B2 (en) | 2014-10-17 | 2017-08-29 | Tdk-Micronas Gmbh | Apparatus and method for determining a rotation angle of a rotor |
Also Published As
Publication number | Publication date |
---|---|
CN1217786A (zh) | 1999-05-26 |
DE19707263B4 (de) | 2006-03-16 |
EP1095242A1 (de) | 2001-05-02 |
DE19707263A1 (de) | 1998-08-27 |
JP3011774B2 (ja) | 2000-02-21 |
US6279375B1 (en) | 2001-08-28 |
KR20000065066A (ko) | 2000-11-06 |
JPH11508698A (ja) | 1999-07-27 |
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