DE102005047013A1 - Rotary sensor for detecting rotational position of e.g. accelerator pedal, has connections that are loaded with major sensor signal or with no sensor signal in case of short circuit between connections for measuring sensor signals - Google Patents
Rotary sensor for detecting rotational position of e.g. accelerator pedal, has connections that are loaded with major sensor signal or with no sensor signal in case of short circuit between connections for measuring sensor signals Download PDFInfo
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- DE102005047013A1 DE102005047013A1 DE102005047013A DE102005047013A DE102005047013A1 DE 102005047013 A1 DE102005047013 A1 DE 102005047013A1 DE 102005047013 A DE102005047013 A DE 102005047013A DE 102005047013 A DE102005047013 A DE 102005047013A DE 102005047013 A1 DE102005047013 A1 DE 102005047013A1
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- sensor
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- 238000010079 rubber tapping Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 18
- 230000003542 behavioural effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000630 rising 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
- G01D5/244—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
- G01D5/24485—Error correction using other sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/106—Detection of demand or actuation
-
- 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
- G01D5/16—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 resistance
- G01D5/165—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 resistance by relative movement of a point of contact or actuation and a resistive track
- G01D5/1655—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 resistance by relative movement of a point of contact or actuation and a resistive track more than one point of contact or actuation on one or more tracks
-
- 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
- G01D5/24457—Failure detection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/107—Safety-related aspects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
- F02D2400/08—Redundant elements, e.g. two sensors for measuring the same parameter
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
Die Erfindung betrifft einen Geber zum Erfassen von Drehstellungen von drehbaren oder schwenkbaren Teilen oder Wegen in Kraftfahrzeugen, zum Beispiel Fahrpedale oder an Drosselklappen, umfassend zumindest ein paar Sensoren mit zueinander invers verlaufenden Kennlinien und jeweils einem der Sensoren zugeordneten Anschluss zum Abgreifen eines analogen Sensorsignals.The The invention relates to a sensor for detecting rotational positions of rotatable or pivotable parts or ways in motor vehicles, for example, accelerators or throttle valves, comprising at least a few sensors with mutually inverse curves and in each case one of the sensors associated connection for tapping an analog sensor signal.
Aus dem Stand der Technik sind bei der Robert Bosch AG entwickelte Drehgeber der eingangs genannten Art bekannt. Diese Drehgeber weisen als Sensoren zwei Potentiometer auf, die mechanisch gekoppelte Schleiferabgriffe haben, und die mit vertauschter Verpolung mit elektrischem Strom versorgt werden. Durch die vertauschte Verpolung verlaufen die Kennlinien der beiden Potentiometer d. h. der ohmschen Widerstände der Potentiometer in Abhängigkeit der Schleiferstellung invers zueinander. Während das eine Potentiometer eine steigende Gerade als Kennlinie hat, hat das andere Potentiometer eine mit der betragsmäßig gleichen Steigung fallende Gerade als Kennlinie. Bei einem Widerstand von 50% des maximalen Widerstands kreuzen sich die beiden Kennlinien. Der Vorteil eines solchen Drehgebers mit zwei Sensoren mit invers verlaufenden Kennlinien ist zum einen die Redundanz, zum anderen die mögliche Fehlererkennung von Defekten der Sensoren oder Unterbrechungen in den von dem Drehgeber zu einem ein Drehgebersignal weiterverarbeitenden Mittel führenden Leitungen für die analogen Sensorsignale. Ein besonderer Vorteil der zueinander invers verlaufenden Kennlinien im Gegensatz zu anderen bekannten Möglichkeiten des Aufbaus eines redundanten Drehgebers ist, dass die Auflösung des Sensorsignals, das an den Anschlüssen zum Abgreifen eines analogen Sensorsignals zur Verfügung gestellt wird, für beide Sensoren gleich groß ist. Der so ausgestaltete Drehgeber hat jedoch den Nachteil, dass die Fehlererkennung im Falle eines Kurzschlusses zwischen den Sensorsignalen beziehungsweise den Leitungen oder Anschlüssen für die beiden Sensorsignale versagt. In diesem Fall wird auf beiden Sensorleitungen unabhängig von der Winkelstellung dessen Betrag zu erfassen ist, stets ein Sensorsignal von 50% des maximalen Signalpegels des Sensorsignals zur Verfügung gestellt wird. Das die Sensorsignale verarbeitende Mittel, das zur Fehlererkennung prüft, ob die Summe der beiden Sensorsignale stets 100% des maximalen Signalpegels eines Sensorsignals ergeben, wird in diesem Fall stets einen fehlerfreien Zustand erkennen, obwohl tatsächlich der Kurzschluss zwischen den beiden Sensorsignalen vorliegt. Wegen dieser bisher mangelhaften Fehlerkontrolle im Falle des Kurzschlusses zwischen den Sensorsignalleitungen beziehungsweise Anschlüssen sind diese Drehgeber für Fahrpedale oder andere sicherheitskritische Bereiche nicht geeignet. Die Drehgeber konnten bisher nur beispielsweise für Drosselklappen verwendet werden, die zum einen nicht sicherheitskritisch sind und zum anderen gegebenenfalls durch zusätzliche Plausibilitätsprüfungen auf fehlerfreie Funktion überprüft werden können.Out The state of the art are rotary encoders developed by Robert Bosch AG of the aforementioned type known. These encoders point as sensors two potentiometers, the mechanically coupled wiper taps have, and those with reversed polarity reversal with electricity be supplied. Due to the reversed polarity, the characteristic curves run the two potentiometers d. H. the ohmic resistance of the Potentiometer depending the wiper position inverse to each other. While that one potentiometer has a rising straight line as a characteristic has the other potentiometer one with the same amount Slope falling straight line as a characteristic. At a resistance of 50% of the maximum resistance crosses the two characteristics. The advantage of such a rotary encoder with two sensors with inverse running characteristics is on the one hand the redundancy, on the other hand the possible Error detection of defects of the sensors or interruptions in from the encoder to a rotary encoder signal processing Funds leading Lines for the analog sensor signals. A special advantage of each other inverse characteristic curves in contrast to other known options The structure of a redundant encoder is that the resolution of the Sensor signal at the terminals is provided for picking up an analog sensor signal, for both Sensors are the same size. However, the encoder designed in this way has the disadvantage that the Error detection in case of a short circuit between the sensor signals or the lines or connections for the two sensor signals failed. In this case, on both sensor lines regardless of the angular position whose amount is to be detected, always a sensor signal provided by 50% of the maximum signal level of the sensor signal becomes. The sensor signals processing means for error detection check if the sum of the two sensor signals always 100% of the maximum signal level a sensor signal, in this case always a faultless Recognize state, though actually there is a short circuit between the two sensor signals. Because of this hitherto faulty error control in the case of short circuit between the sensor signal lines or connections these encoders for Accelerators or other safety-critical areas not suitable. So far, the encoders could only be used, for example, for throttle valves are used, which are not safety-critical and one on the other hand, if necessary, by additional plausibility checks error-free function to be checked can.
Vor dem Hintergrund der Nachteile des Standes der Technik liegt der Erfindung die Aufgabe zugrunde, einen Geber der eingangs genannten Art so weiterzuentwickeln, dass auch eine Fehlererkennung im Falle eines Kurzschlusses zwischen den Signalleitungen beziehungsweise Sensorsignalanschlüssen möglich ist.In front the background of the disadvantages of the prior art is the Invention the task is based, a donor of the aforementioned Art to develop so that even a fault detection in the case a short circuit between the signal lines respectively Sensor signal connections is possible.
VORTEILE DER ERFINDUNGADVANTAGES OF INVENTION
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass der Geber zumindest ein Regelmittel aufweist, das den Sensoren zugeordnet ist, wobei das zumindest eine Regelmittel geeignet und eingerichtet ist, im Fall eines Kurzschlusses zwischen den Anschlüssen zum Abgreifen der Sensorsignale die Anschlüsse zum Abgreifen der Sensorsignale entweder mit dem jeweils größeren Sensorsignal oder aber mit dem jeweils kleineren Sensorsignal zu beaufschlagen. Im Falle eines Kurzschlusses zwischen den Anschlüssen zum Abgreifen der Sensorsignale liegt an beiden Anschlüssen zum Abgreifen der Sensorsignale das gleiche Potential oder mit anderen Worten das gleiche Sensorsignal an. Das zumindest eine Regelmittel gewährleistet nun, dass das im Kurzschluss an beiden Anschlüssen zum Abgreifen der Sensorsignale anliegende Sensorsignal entweder von dem einen Sensor oder von dem anderen Sensor im fehlerfreien Fall des Gebers zur Verfügung gestellten Sensorsignals entspricht. Es handelt sich dabei entweder um das jeweils größere Sensorsignal oder aber um das jeweils kleinere Sensorsignal je nach dem, wie das zumindest eine Regelmittel eingerichtet ist.These Task is inventively characterized solved, that the encoder has at least one control means, the sensors is assigned, wherein the at least one control means suitable and is established in the event of a short circuit between the terminals to Tapping the sensor signals the terminals for tapping the sensor signals either with the respective larger sensor signal or but to apply the respective smaller sensor signal. in the Case of a short circuit between the terminals for tapping the sensor signals is located at both connections to pick up the sensor signals the same potential or with others Words the same sensor signal. The at least one rule means guaranteed now that in the short circuit at both terminals for tapping the sensor signals applied sensor signal either from the one sensor or from the other sensor provided in error-free case of the encoder Sensor signal corresponds. It is either that each larger sensor signal or but the smaller the sensor signal depending on how that at least a control means is set up.
Vorzugsweise weist der Geber zwei Regelmittel auf, die jeweils einem der Sensoren zugeordnet sind. Im Falle des Kurzschlusses verhält sich das Regelmittel des Sensors dominant, dessen Sensorsignal am Ausgang abgegriffen werden soll. Es handelt sich dabei entweder um den Sensor mit dem größeren Sensorsignal oder um den Sensor mit dem kleineren Sensorsignal an der jeweiligen Stellung des bewegbaren beziehungsweise schwenkbaren Teils. Das Regelmittel des Sensors, dessen Sensorsignal an den Anschlüssen nicht abgreifbar ist, wird als sich rezessiv verhaltendes Regelmittel bezeichnet.Preferably the transmitter has two control means, each one of the sensors assigned. In case of a short circuit, the control means of the Sensor dominant, whose sensor signal is tapped at the output should. It is either the sensor with the larger sensor signal or to the sensor with the smaller sensor signal at the respective Position of the movable or pivotable part. The Control means of the sensor whose sensor signal at the terminals not can be tapped, is considered a recessive behavioral regulator designated.
Die Regelmittel können in einer Ausführungsform des Gebers Teil der Sensoren sein oder zumindest teilweise in die Sensoren integriert sein.The control means may be part of the sensors in one embodiment of the transmitter or be at least partially integrated into the sensors.
Die Regelmittel können jeweils entweder einen High-Side-Treiber oder einen Low-Side-Treiber umfassen die beispielsweise aus einer Kombination eines Transistors und einem dem Transistor zugeordneten Pull-Up- beziehungsweise Pull-Down-Widerstand gebildet sein. An der Basis der Transistoren liegt vorzugsweise ein dem von einem Erfassungsmittel des Sensors erzeugtes Signal an, welches den Transistor zum Erzeugen des Sensorsignals ansteuert. Der Kollektor ist vorzugsweise mit dem übrigen Regelmittel verbunden, wodurch eine Rückkopplung des von dem Transistor erzeugten Sensorsignals zu dem übrigen Regelmittel möglich ist.The Control means can each comprise either a high-side driver or a low-side driver for example, a combination of a transistor and a the transistor associated pull-up or pull-down resistor be formed. At the base of the transistors is preferably a signal generated by a detection means of the sensor on, which drives the transistor for generating the sensor signal. The collector is preferably connected to the rest of the control means, whereby a feedback of the sensor signal generated by the transistor to the rest of the control means possible is.
Der erfindungsgemäße Geber kann mit einer Vorrichtung zum Verarbeiten der Sensorsignale zu einer erfindungsgemäßen Anordnung kombiniert sein. Bei der Vorrichtung zum Verarbeiten der Sensorsignale kann es sich zum Beispiel um ein Steuergerät handeln.Of the Inventive donors can with a device for processing the sensor signals to a inventive arrangement be combined. In the device for processing the sensor signals For example, it may be a controller.
In einer solchen Anordnung kann der Geber und die Vorrichtung über zumindest zwei Übertragungskanäle zum Übertragen der Sensorsignale der beiden Sensoren miteinander verbunden sein. Die Vorrichtung ist vorzugsweise eingerichtet und geeignet, die Sensorsignale in der Vorrichtung über je einen Pull-Down-Widerstand beziehungsweise Pull-Up-Widerstand zu einem ersten Referenzpotential abfallen zu lassen.In Such an arrangement, the encoder and the device via at least two transmission channels for transmission the sensor signals of the two sensors to be interconnected. The device is preferably arranged and suitable, the Sensor signals in the device via a respective pull-down resistor or pull-up resistor to drop to a first reference potential.
Die Vorrichtung kann ferner geeignet und eingerichtet sein, die Summe der Sensorsignale mit einer Spannung zwischen dem ersten Referenzpotential und einem zweiten Referenzpotential oder mit einem maximalen möglichen Signalpegel der Sensorsignale zu vergleichen.The Device may also be suitable and arranged, the sum the sensor signals with a voltage between the first reference potential and a second reference potential or with a maximum possible Compare signal level of the sensor signals.
ZEICHNUNGDRAWING
Ein Ausführungsbeispiel für eine erfindungsgemäße Anordnung aus einem erfindungsgemäßen Drehgeber und einem Steuergerät zum Verarbeiten von dem Drehgeber zur Verfügung gestellten Sensorsignalen ist anhand der einzigen Figur näher beschrieben.One embodiment for one inventive arrangement from a rotary encoder according to the invention and a controller for processing sensor signals provided by the rotary encoder is closer by the single figure described.
BESCHREIBUNG DES AUSFÜHRUNGSBEISPIELSDESCRIPTION OF THE EMBODIMENT
Der
in der Figur dargestellte Drehgeber
Die
Kennlinie des anderen Erfassungsmittels
Der
Kennlinienverlauf des Erfassungsmittels
Das
von den Erfassungsmitteln
An
den Emitter dieser Transistoren
Der
Kollektor der Transistoren
Der
Anschluss
Das
Steuergerät
Die
Regelmittel
Das
rezessive Regelmittel
Zur
Fehlerüberwachung
und insbesondere zur Erkennung eines Kurzschlusses zwischen den beiden
Sensorsignalen weist das Steuergerät ein Fehlererkennungsmittel
Claims (8)
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DE102005047013.0A DE102005047013B4 (en) | 2005-09-30 | 2005-09-30 | giver |
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DE102005047013.0A DE102005047013B4 (en) | 2005-09-30 | 2005-09-30 | giver |
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DE102005047013A1 true DE102005047013A1 (en) | 2007-04-05 |
DE102005047013B4 DE102005047013B4 (en) | 2018-10-11 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4004085A1 (en) * | 1990-02-10 | 1991-08-14 | Bosch Gmbh Robert | METHOD AND DEVICE FOR ELECTRONIC CONTROL AND / OR REGULATION OF AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE |
DE19642174A1 (en) * | 1996-10-12 | 1998-04-16 | Hella Kg Hueck & Co | Circuit arrangement for detecting the position of a movable element in a motor vehicle |
DE10036935A1 (en) * | 2000-07-28 | 2002-02-07 | Siemens Ag | Sensor monitoring system for vehicles detects excessive gradient in output sums |
DE10345311A1 (en) * | 2003-09-30 | 2005-04-14 | Robert Bosch Gmbh | Method for operating an internal combustion engine |
-
2005
- 2005-09-30 DE DE102005047013.0A patent/DE102005047013B4/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4004085A1 (en) * | 1990-02-10 | 1991-08-14 | Bosch Gmbh Robert | METHOD AND DEVICE FOR ELECTRONIC CONTROL AND / OR REGULATION OF AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE |
DE19642174A1 (en) * | 1996-10-12 | 1998-04-16 | Hella Kg Hueck & Co | Circuit arrangement for detecting the position of a movable element in a motor vehicle |
DE10036935A1 (en) * | 2000-07-28 | 2002-02-07 | Siemens Ag | Sensor monitoring system for vehicles detects excessive gradient in output sums |
DE10345311A1 (en) * | 2003-09-30 | 2005-04-14 | Robert Bosch Gmbh | Method for operating an internal combustion engine |
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