DE19705312B4 - Adaptive steering angle sensor for vehicles - Google Patents
Adaptive steering angle sensor for vehicles Download PDFInfo
- Publication number
- DE19705312B4 DE19705312B4 DE1997105312 DE19705312A DE19705312B4 DE 19705312 B4 DE19705312 B4 DE 19705312B4 DE 1997105312 DE1997105312 DE 1997105312 DE 19705312 A DE19705312 A DE 19705312A DE 19705312 B4 DE19705312 B4 DE 19705312B4
- Authority
- DE
- Germany
- Prior art keywords
- steering angle
- code
- angle sensor
- sensor according
- adaptive
- 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.)
- Expired - Fee Related
Links
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000011156 evaluation Methods 0.000 description 6
- 238000011109 contamination Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D15/00—Steering not otherwise provided for
- B62D15/02—Steering position indicators ; Steering position determination; Steering aids
-
- 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
- G01D5/26—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/3473—Circular or rotary 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
- G01D5/26—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34776—Absolute encoders with analogue or digital scales
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
Adaptiver Lenkwinkelsensor für Fahrzeuge, der zur Lenkwinkelbestimmung einen Code auf dem drehenden Teil benutzt und eine Fotodetektoranordnung aufweist, auf die der Code abgebildet wird, dadurch gekennzeichnet, dass eine absolute Winkelbestimmung durch Auslesen der Kontrastinformation mittels eines Mikroprozessors (108) erfolgt, der sowohl die Winkellage des Codes als auch die Feinauflösung der Winkel durch die relative Lage des erkannten Codes zur Abbildung auf der Fotodetektoranordnung (107) ermittelt, und dass zugleich bei jeder Messung die Gesamtfunktion des Systems überprüft und angepasst wird.adaptive Steering angle sensor for Vehicles for steering angle determination a code on the rotating Part used and having a photodetector array, to which the Code is mapped, characterized in that an absolute Angle determination by reading the contrast information by means of a microprocessor (108) takes place, which both the angular position of the code as well as the fine resolution the angle through the relative position of the recognized code for illustration determined on the photodetector array (107), and that at the same time at each measurement the overall function of the system is checked and adjusted becomes.
Description
Die Erfindung betrifft einen adaptiven Lenkwinkelsensor für Fahrzeuge gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to an adaptive steering angle sensor for vehicles according to the preamble of Claim 1.
Um den Winkel einer im Fahrzeug untergebrachten Lenkeinrichtung entsprechend dem Wunsch des Fahrzeugführers zu messen, sind bereits Anordnungen bekannt.Around the angle of a housed in the vehicle steering device accordingly the wish of the driver Measurements are already known arrangements.
So
werden bereits Drehwiderstände
mit der Lenksäule
gekoppelt und geben ein analoges Signal ab. Außerdem ist die Anordnung einer
oder mehrerer Lichtschranken bekannt, die durch entsprechende Kulissen
eine digitale Erfassung des Lenkwinkels gestatten. Alle diese Anordnungen
haben den Nachteil, dass sie sehr enge elektrische, optische oder
mechanische Toleranzen erforderlich machen und nicht über alle
Funktionen testbar
sind oder sehr viel Volumen im Bereich der
Lenksäule
einnehmen.Thus, rotational resistances are already coupled with the steering column and emit an analog signal. In addition, the arrangement of one or more light barriers is known, which allow through appropriate scenes a digital detection of the steering angle. All of these arrangements have the disadvantage that they require very narrow electrical, optical or mechanical tolerances and can not be tested over all functions
are or take a lot of volume in the area of the steering column.
Zur Bestimmung der absoluten Weg- und Winkelinformation durch optische Auswertung von Strichkodestrukturen ist aus der Veröffentlichung von Trumpold, Harry u. a.: Auswertung von Strichkodestrukturen zur absoluten Weg- und Winkelmessung, Feinwerktechnik und Meßtechnik 1994, Heft 11–12, S. 566–572, ein entsprechendes System bekannt. Dieses System ist für einen Lenkwinkelsensor in Fahrzeugen nicht geeignet. Es müssen zur Vermeidung von Toleranzproblemen drei Codeinformationen auf einem CCD oder einem Mehrfach-CCD abgelesen werden. Damit ist eine sehr hohe Auflösung erforderlich, die einen teuren Computer und eine filigrane Codestruktur erforderlich macht, was in einer Großserie, wie im Kraftfahrzeugbau, nicht realisierbar ist.to Determination of the absolute path and angle information by optical Evaluation of bar code structures is from the publication by Trumpold, Harry u. a .: Evaluation of Bar Code Structures for absolute displacement and angle measurement, precision engineering and measuring technology 1994, Issue 11-12, p. 566-572, a corresponding system known. This system is for one Steering angle sensor not suitable in vehicles. It must to Avoidance of tolerance problems three code information on one CCD or a multiple CCD can be read. This is a very high resolution required, which requires an expensive computer and a filigree code structure do what in a mass production, as in the automotive industry, is not feasible.
In
der
In
der
Der Erfindung liegt die Aufgabe zugrunde, einen Lenkwinkelsensor zu schaffen, der keine engen elektrischen, optischen oder mechanischen Toleranzen aufweist und über alle Funktionen testbar ist.Of the Invention is based on the object, a steering angle sensor do not create any tight electrical, optical or mechanical Has tolerances and over all functions are testable.
Erfindungsgemäß wird das gemäß den Merkmalen des Anspruchs 1 erreicht.According to the invention according to the characteristics of claim 1 achieved.
Bei einem adaptiven Lenkwinkelsensor für Fahrzeuge, der zur Lenkwinkelbestimmung einen Code auf dem drehenden Teil benutzt und eine Fotodetektoranordnung aufweist, auf die der Code abgebildet ist, erfolgt erfindungsgemäß eine absolute Winkelbestimmung durch Auslesen der Kontrastinformation mittels eines Mikroprozessors, der sowohl die Winkellage des Codes als auch die Feinauflösung der Winkel durch die relative Lage des erkannten Codes zur Abbildung auf der Fotodetektoranordnung ermittelt, wobei zugleich bei jeder Messung die Gesamtfunktion des Systems überprüft und angepasst wird.at an adaptive steering angle sensor for vehicles, the steering angle determination using a code on the rotating part and a photodetector array has, to which the code is mapped, according to the invention is an absolute Angle determination by reading the contrast information by means of a microprocessor, which both the angular position of the code and the fine resolution of Angle by the relative position of the recognized code for illustration determined on the photodetector, wherein at the same time at each Measurement the overall function of the system is checked and adjusted.
Zur Überwachung der Systemfunktion kann auf die Fotodetektorzeile mindestens ein Referenzschattenbild projiziert werden.For monitoring the system function can at least one on the photodetector line Reference shadow image are projected.
Weiterhin ist es zweckmäßig, dass der absolute Winkelbereich bei n × 360° über die Fahrgeschwindigkeit des Fahrzeugs ermittelt wird.Farther it is appropriate that the absolute angle range at n × 360 ° over the travel speed of the vehicle is determined.
Zur Erhöhung der Auflösung können mindestens zwei unterschiedliche Abbildungen eines oder mehrerer Umfangscodes auf die Fotodetektorzeile abgebildet werden.to increase the resolution can at least two different illustrations of one or more Perimeter codes are mapped to the photodetector line.
Zur Erfassung des absoluten Lenkwinkels auch bei abgeschalteten Fahrzeugsystemen wird der Lenkwinkel durch kurzes Einschalten des Lenkwinkelsensors in Zeitintervallen, in denen keine Drehung größer 180° möglich ist, ermittelt.to Detection of the absolute steering angle even when the vehicle systems are switched off is the steering angle by briefly turning on the steering angle sensor in time intervals in which no rotation greater than 180 ° is possible determined.
Um optische und mechanische Toleranzen auszugleichen werden die auf der Fotodetektorzeile entstehenden Signale im Hinblick auf ihre Flankensteilheit und Abbildungsgröße ausgewertet.Around compensate for optical and mechanical tolerances on the photodetector line resulting signals with regard to their Slope and image size evaluated.
Die Erfindung soll in Ausführungsbeispielen anhand von Zeichnungen erläutert werden. Es zeigen:The Invention is based on embodiments explained by drawings become. Show it:
Ein
Beispiel der Erfindung soll anhand von
Der
Betrachtungsbereich
Hier
sind auf der x-Achse
Durch
die Auswertung der Amplituden
Eine
Weiterbildung der Erfindung ist in
Dadurch, dass mit einer einzigen Fotodetektorzeile der Winkel im Bereich von 360° sehr schnell ausgewertet werden kann, ist das System durch einfaches Mitregistrieren der 360° Überschreitung für Winkel über 360° und damit für mehrere Umdrehungen geeignet. Um dies nicht nur für den Fahrbetrieb zu gewährleisten, muss das System im Standbybetrieb jeweils kurzzeitig eingeschaltet werden, wobei die Einschaltintervalle so gewählt werden, dass in diesem Intervall keine Lenkraddrehung größer 360° möglich ist.Thereby, that with a single photodetector line the angle in the range of 360 ° very much can be evaluated quickly, the system is simple Register the 360 ° transgression for angles over 360 ° and with it for many Turns suitable. In order to ensure this not only for driving, the system must be switched on for a short time in standby mode be, with the switch-on intervals are chosen so that in this Interval no steering wheel rotation greater than 360 ° is possible.
Da das System zur Datenübertragung eine Schnittstelle zum Fahrzeugrechner hat, kann natürlich von dort aus die Fahrzeuggeschwindigkeit übernommen werden, um den Nullbereich des Lenkwinkels zu definieren. Dies geschieht erfindungsgemäß dadurch, dass ab einer bestimmten Geschwindigkeit bei normalen Fahrzeugen kein Lenkwinkel über z. B. +/–90° von der Nullstellung aus fahrbar ist.There the system for data transmission has an interface to the vehicle computer, of course from there the vehicle speed are taken over to the zero range to define the steering angle. This happens according to the invention by that starting at a certain speed on normal vehicles no steering angle over z. B. +/- 90 ° from the Zeroing is mobile.
Zur
Erhöhung
der Winkelauflösung
kann die Erfindung auch entsprechend
Claims (6)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997105312 DE19705312B4 (en) | 1997-02-13 | 1997-02-13 | Adaptive steering angle sensor for vehicles |
DE1997158104 DE19758104B4 (en) | 1997-02-13 | 1997-12-18 | Adaptive absolute steering angle sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997105312 DE19705312B4 (en) | 1997-02-13 | 1997-02-13 | Adaptive steering angle sensor for vehicles |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19705312A1 DE19705312A1 (en) | 1998-08-20 |
DE19705312B4 true DE19705312B4 (en) | 2009-04-16 |
Family
ID=7820002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1997105312 Expired - Fee Related DE19705312B4 (en) | 1997-02-13 | 1997-02-13 | Adaptive steering angle sensor for vehicles |
Country Status (1)
Country | Link |
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DE (1) | DE19705312B4 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1040039B1 (en) | 1997-12-18 | 2002-03-27 | Takata-Petri AG | Adaptive absolute steering angle sensor |
AUPP704098A0 (en) | 1998-11-10 | 1998-12-03 | Bishop Innovation Pty Limited | Optical sensor |
DE10056605A1 (en) * | 2000-11-15 | 2002-05-23 | Kostal Leopold Gmbh & Co Kg | Method for signal evaluation of an opto-electronic path or angle measurement device, especially for determination of a vehicle steering column position, in which adjustments can be made for impaired sensors or damaged code wheel |
DE10065229A1 (en) * | 2000-12-27 | 2002-07-04 | Valeo Schalter & Sensoren Gmbh | Steering angle sensor |
JP4205343B2 (en) * | 2002-01-15 | 2009-01-07 | アルプス電気株式会社 | Rotation angle detector |
US7265336B2 (en) | 2003-12-01 | 2007-09-04 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Encoder utilizing a reflective cylindrical surface |
DE102005038855A1 (en) | 2005-08-12 | 2007-02-15 | Takata-Petri Ag | steering wheel assembly |
EP2889186A1 (en) * | 2013-12-27 | 2015-07-01 | Demerstee Transport Solutions bvba | A driver drowsiness detection and alerting system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4228719A1 (en) * | 1992-08-28 | 1994-03-03 | Schaeffler Waelzlager Kg | Capacitive steering angle sensor for motor vehicle - forms first capacitor group from electronics transmitter electrodes and scale receiver electrodes, and second capacitor group from scale transmitter electrodes and electronics receiver electrodes |
DE4324381A1 (en) * | 1993-07-21 | 1995-01-26 | Jenoptik Jena Gmbh | Optical position transmitter |
-
1997
- 1997-02-13 DE DE1997105312 patent/DE19705312B4/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4228719A1 (en) * | 1992-08-28 | 1994-03-03 | Schaeffler Waelzlager Kg | Capacitive steering angle sensor for motor vehicle - forms first capacitor group from electronics transmitter electrodes and scale receiver electrodes, and second capacitor group from scale transmitter electrodes and electronics receiver electrodes |
DE4324381A1 (en) * | 1993-07-21 | 1995-01-26 | Jenoptik Jena Gmbh | Optical position transmitter |
Non-Patent Citations (2)
Title |
---|
TRUMPOLD, Harry u.a.: Auswertung von Strichkodestr ukturen zur absoluten Weg- und Winkelmessung, In: Feinwerktechnik und Meßtechnik 1994, H. 11-12, S. 566-572 |
TRUMPOLD, Harry u.a.: Auswertung von Strichkodestrukturen zur absoluten Weg- und Winkelmessung, In: Feinwerktechnik und Meßtechnik 1994, H. 11-12, S. 566-572 * |
Also Published As
Publication number | Publication date |
---|---|
DE19705312A1 (en) | 1998-08-20 |
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