EP2545650A1 - Verfahren zur auswertung eines analogen signals - Google Patents
Verfahren zur auswertung eines analogen signalsInfo
- Publication number
- EP2545650A1 EP2545650A1 EP11705602A EP11705602A EP2545650A1 EP 2545650 A1 EP2545650 A1 EP 2545650A1 EP 11705602 A EP11705602 A EP 11705602A EP 11705602 A EP11705602 A EP 11705602A EP 2545650 A1 EP2545650 A1 EP 2545650A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- analog signal
- converter
- signal
- evaluating
- determined
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/64—Analogue/digital converters with intermediate conversion to phase of sinusoidal or similar periodical signals
- H03M1/645—Analogue/digital converters with intermediate conversion to phase of sinusoidal or similar periodical signals for position encoding, e.g. using resolvers or synchros
-
- 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
- G01D5/2006—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 by influencing the self-induction of one or more coils
- G01D5/2013—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 by influencing the self-induction of one or more coils by a movable ferromagnetic element, e.g. a core
-
- 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
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
- H03M1/129—Means for adapting the input signal to the range the converter can handle, e.g. limiting, pre-scaling ; Out-of-range indication
Definitions
- the invention relates to a method for evaluating an analog signal, which carries information about a rotational movement, and to a circuit arrangement for evaluating an analog signal, which is suitable in particular for carrying out the method.
- an input is used to read approx. 2.5 V resolution with a 150 V input signal.
- a second input is used, which has a much lower maximum value, for example. 5 V, and thus about 80 mV resolution.
- only a single AD converter can be used which has an input voltage range of, for example, 5 V and limits all larger signals, provided that only the zero crossings of the signal are evaluated.
- the AD converter converts one of the two areas very quickly, for example with 500 ns conversion time.
- the speed signal is detected from this input signal, including the ability to count digital filters.
- Other embodiments may include the use of an AD converter with more or less bits or the use of only one AD channel for reading.
- FIG. 1 shows a circuit arrangement according to the prior art.
- FIG. 2 shows an embodiment of the circuit arrangement according to the invention.
- FIG. 1 shows a circuit arrangement according to the prior art, which is designated overall by the reference numeral 10.
- This circuit 10 is used, for example, in a crankshaft.
- the illustration shows an inductive sensor 12, which is connected to a control unit 14.
- a first capacitor 16 In this control unit, a first capacitor 16, a second capacitor 18, a first resistor 20, a second resistor 22, a third resistor 24, a fourth resistor 26, a third capacitor 28, a fifth resistor 38 and a fourth capacitor 40 are provided.
- an analog signal 32 At the output 30 is an analog signal 32, which provides information about the rotation of a body to be examined, for example. A crankshaft.
- the analog signal 32 is input to an ASIC 34 for further processing.
- a processed signal 46 is output, which is read into a microcontroller 48 for evaluation and for this purpose in a phase locked loop PLL (PLL: Phase locked loop) 50 is entered.
- PLL Phase locked loop
- inductive crankshaft sensors are used because they are inexpensive, robust and very precise compared to Hall sensors.
- Hall sensors which can be connected directly to a microcontroller, they provide an analogue signal that must be specially processed. So far, this is, as shown in Figure 1, with special application-specific building blocks, in this case with the ASIC 34, performed.
- the amplitude of the sensor signal is proportional to the rotational speed of the crankshaft. This speed can vary in a range of more than 1: 1, 000, namely a cold start of the engine below 20 rpm, up to a maximum speed of the engine above 20,000 rpm. Accordingly, the amplitude of the signal behaves. This can vary from about 100 mV p (mV peak) to about 100 V p .
- the signal is sensitive to disturbances. Since shielding is usually too expensive, symmetrical wiring between the sensor and the engine control unit (ECU) is often used.
- ECU engine control unit
- the sensor signal has no DC component and therefore the offset error of the AD converter is irrelevant. This can be completely compensated, for example with software. A gain error also has no effect since the absolute value of the signal is irrelevant.
- sampling frequency it should be noted that the sensor signal is nearly sinusoidal with some sub-harmonic components around a mark with 1 to 3 missing teeth.
- a sampling frequency f s of about 20 kHz and motorcycles of about 100 kHz is sufficient.
- FIG. 1 shows how the signal from the inductive sensor 12 is processed or conditioned with the resistors 20, 22, 24 and 26.
- the capacitors 16 and 18 serve to protect against electrostatic discharge (ESD) and electromagnetic interference (EMI).
- the capacitor 28 is used for interference suppression.
- the ASIC 34 uses an analog comparator to detect the zero crossing of the signal 32. At zero crossing, the ASIC 34 generates a pulse at its digital output. This digital output drives the timing units in the microcontroller 48.
- the ASIC 34 has a differential input.
- FIG. 2 shows a circuit arrangement 100 according to the invention.
- the illustration shows an inductive sensor 102, a control unit 104 and a microcontroller 106.
- the control unit 104 has a first capacitor 108, a second capacitor 110, a first resistor 112, a second resistor 114, a third resistor 16, a fourth resistor 118, a third capacitor 120, a fifth resistor 122 and a sixth resistor 124 on.
- the microcontroller 106 includes an AD converter 126, a computing unit 128, on which software or a software block is stored, and a PLL 130.
- the sampling frequency f s 132 is predetermined.
- a conditioned signal at the output of the control unit 104 representing the analog signal 150 to be evaluated directly drives the differential input of the AD converter 126.
- the resistors 122 and 124 limit the current to prevent the AD converter 126 from being damaged in the event of overdriving (clipping ).
- the inductive sensor 102 is directly connected to the AD converter 126.
- the AD converter 126 outputs samples 152.
- the software block on the computing unit 128 issues time stamps 154.
- the required number of bits can be reduced if the AD converter 126 is overdriven. This is possible because only the zero crossings of signal 150 are of interest. Only a small area around zero has to be digitized to allow for noise suppression algorithms. The rest of the signal can be clipped.
- the AD converter 126 provides samples 152 at the constant rate f s 132.
- the interpolation routine uses a so-called cubic spline (cubic interpolation) or other suitable algorithm to determine the time of zero crossing.
- This time stamp 154 is the output to the digital PLL 130 of the timer unit of the microcontroller 106. From this point on, the further processing is as known.
- the rate of rotation or the rotational speed of the body but also its position or angular position can be determined.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Analogue/Digital Conversion (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010002695A DE102010002695A1 (de) | 2010-03-09 | 2010-03-09 | Verfahren zur Auswertung eines analogen Signals |
PCT/EP2011/052996 WO2011110446A1 (de) | 2010-03-09 | 2011-03-01 | Verfahren zur auswertung eines analogen signals |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2545650A1 true EP2545650A1 (de) | 2013-01-16 |
Family
ID=43881121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11705602A Ceased EP2545650A1 (de) | 2010-03-09 | 2011-03-01 | Verfahren zur auswertung eines analogen signals |
Country Status (7)
Country | Link |
---|---|
US (1) | US9100037B2 (de) |
EP (1) | EP2545650A1 (de) |
JP (1) | JP5491645B2 (de) |
KR (1) | KR101760153B1 (de) |
CN (1) | CN102783032B (de) |
DE (1) | DE102010002695A1 (de) |
WO (1) | WO2011110446A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10830591B2 (en) | 2018-03-23 | 2020-11-10 | The Boeing Company | System and method for dual speed resolver |
US10913550B2 (en) | 2018-03-23 | 2021-02-09 | The Boeing Company | System and method for position and speed feedback control |
US10911061B2 (en) * | 2018-03-23 | 2021-02-02 | The Boeing Company | System and method for demodulation of resolver outputs |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050235028A1 (en) * | 2003-05-23 | 2005-10-20 | Manfred Kirschner | Electronic circuit for measured parameter recording |
US7082178B2 (en) * | 2001-12-14 | 2006-07-25 | Seiko Epson Corporation | Lock detector circuit for dejitter phase lock loop (PLL) |
US7589656B2 (en) * | 2004-06-16 | 2009-09-15 | Siemens Aktiengesellschaft | Crankshaft-synchronous detection of analog signals |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3018496A1 (de) | 1980-05-14 | 1981-11-19 | Walter Dipl.-Ing. Dr.-Ing. 8012 Ottobrunn Mehnert | Verfahren und vorrichtung zur messung eines winkels |
JP2799571B2 (ja) * | 1987-07-22 | 1998-09-17 | トヨタ自動車株式会社 | 速度検出装置 |
ES2020131A6 (es) | 1989-06-26 | 1991-07-16 | Cabot Corp | Procedimiento para la produccion de polvos de tantalo, niobio y sus aleaciones. |
JPH0336229U (de) * | 1989-08-18 | 1991-04-09 | ||
JPH0415519A (ja) | 1990-05-09 | 1992-01-20 | Omron Corp | 回転角度検出装置 |
US5455498A (en) | 1990-05-09 | 1995-10-03 | Omron Corporation | Angle of rotation detector |
JP2003509273A (ja) * | 1999-09-15 | 2003-03-11 | コンティネンタル・テーベス・アクチエンゲゼルシヤフト・ウント・コンパニー・オッフェネ・ハンデルスゲゼルシヤフト | 少なくとも2個のセンサ、特にタイヤサイドウォールねじれ(swt)センサを備えた装置 |
EP1333347B1 (de) | 2002-01-30 | 2007-12-05 | Siemens VDO Automotive AG | Verfahren und Vorrichtung zur Ermittlung der Läuferstellung eines Motors durch das Einspeisen eines Resolversignals, das aus der Läuferstellung abgeleitet wird, in ein einziges Steuerungssystem, das sowohl zum Auslösen als auch zum Bestimmen des Resolversignals dient, und ein motorisiertes Fahrzeug, das mit einer solchen Vorrichtung ausgestattet ist |
CN100550560C (zh) | 2004-07-15 | 2009-10-14 | 罗姆股份有限公司 | 过流保护电路 |
JP4491532B2 (ja) | 2004-09-03 | 2010-06-30 | 多摩川精機株式会社 | 信号内挿方法及び装置 |
JP2006234555A (ja) | 2005-02-24 | 2006-09-07 | Hitachi Constr Mach Co Ltd | 作業車両 |
JP4794310B2 (ja) | 2006-02-08 | 2011-10-19 | 士郎 神戸 | 計測信号のためのusb変換器 |
CN100490269C (zh) | 2007-03-26 | 2009-05-20 | 中控科技集团有限公司 | 电阻输出电路 |
-
2010
- 2010-03-09 DE DE102010002695A patent/DE102010002695A1/de not_active Withdrawn
-
2011
- 2011-03-01 US US13/582,871 patent/US9100037B2/en not_active Expired - Fee Related
- 2011-03-01 CN CN201180012906.XA patent/CN102783032B/zh not_active Expired - Fee Related
- 2011-03-01 JP JP2012556441A patent/JP5491645B2/ja not_active Expired - Fee Related
- 2011-03-01 EP EP11705602A patent/EP2545650A1/de not_active Ceased
- 2011-03-01 KR KR1020127023408A patent/KR101760153B1/ko not_active Application Discontinuation
- 2011-03-01 WO PCT/EP2011/052996 patent/WO2011110446A1/de active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7082178B2 (en) * | 2001-12-14 | 2006-07-25 | Seiko Epson Corporation | Lock detector circuit for dejitter phase lock loop (PLL) |
US20050235028A1 (en) * | 2003-05-23 | 2005-10-20 | Manfred Kirschner | Electronic circuit for measured parameter recording |
US7589656B2 (en) * | 2004-06-16 | 2009-09-15 | Siemens Aktiengesellschaft | Crankshaft-synchronous detection of analog signals |
Non-Patent Citations (1)
Title |
---|
See also references of WO2011110446A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR101760153B1 (ko) | 2017-07-20 |
JP5491645B2 (ja) | 2014-05-14 |
CN102783032A (zh) | 2012-11-14 |
DE102010002695A1 (de) | 2011-09-15 |
CN102783032B (zh) | 2016-04-27 |
KR20130014513A (ko) | 2013-02-07 |
WO2011110446A1 (de) | 2011-09-15 |
JP2013521509A (ja) | 2013-06-10 |
US9100037B2 (en) | 2015-08-04 |
US20130063162A1 (en) | 2013-03-14 |
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