WO1999012171A2 - Method for positioning a pointer of an indicator device - Google Patents
Method for positioning a pointer of an indicator device Download PDFInfo
- Publication number
- WO1999012171A2 WO1999012171A2 PCT/DE1998/002464 DE9802464W WO9912171A2 WO 1999012171 A2 WO1999012171 A2 WO 1999012171A2 DE 9802464 W DE9802464 W DE 9802464W WO 9912171 A2 WO9912171 A2 WO 9912171A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pointer
- display device
- starting position
- switched
- stepper motor
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R7/00—Instruments capable of converting two or more currents or voltages into a single mechanical displacement
- G01R7/04—Instruments capable of converting two or more currents or voltages into a single mechanical displacement for forming a quotient
- G01R7/06—Instruments capable of converting two or more currents or voltages into a single mechanical displacement for forming a quotient moving-iron type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
- B60K35/215—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays characterised by the combination of multiple visual outputs, e.g. combined instruments with analogue meters and additional displays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/07—Indicating devices, e.g. for remote indication
- G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
- B60K35/22—Display screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/28—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
Definitions
- the invention relates to a method for positioning a pointer of a display device, in particular a combination instrument in motor vehicles.
- instrument clusters in motor vehicles which have, among other things, analog display means.
- a pointer is positioned over a scaling by means of a stepping motor, so that a measured value can be read.
- a control unit of the instrument cluster receives a measurement signal from vehicle electronics, which is converted by the control unit into control signals for the stepper motor.
- the pointer gets its display position according to the position of the stepper motor.
- Control unit of the instrument cluster the position of the stepper motor and thus the pointer unknown. It therefore requires an initialization of the stepper motor so that the pointer can be moved to a defined starting position. It is known to apply a control signal to the stepper motor when the supply voltage is switched on, which causes the stepper motor to return to the starting position. Since the supply voltage to the instrument cluster is generally only interrupted after the ignition is switched off when a motor vehicle is switched off, the stepper motor is generally replaced by the measurement signals supplied by the motor vehicle electronics, which provide the value zero when the ignition and thus the drive machine are switched off. For example for speed and speed, the pointer has already moved to its starting position (zero position) via the stepper motor. Thus, the initialization run when the supply voltage of the instrument cluster is switched on places an unnecessary load on the stepper motor, which leads to increased wear.
- the method according to the invention with the features mentioned in claim 1 offers the advantage that wear on the stepper motor can be minimized. Because an actual position of the pointer (of the stepping motor) is queried when the supply voltage for the display device is switched on, and the pointer is only moved into the start position if the actual position deviates from a starting position of the pointer, an initialization run is merely only necessary in the event that the actual position of the pointer deviates from the start position. Thus, all normal cases in which the pointer is in the start position anyway after the supply voltage of the display device has been switched off are taken into account, and in these cases no initialization run is carried out. Thus, in addition to the connection of the wear of the stepper motor, an initialization time of the display device is significantly reduced. In addition, a disruptive influence of the initialization run on the control circuit of the display device is prevented.
- the reaching of the starting position of the pointer is stored in a non-volatile memory (EEPROM) and this non-volatile memory is queried when the supply voltage is switched on.
- EEPROM non-volatile memory
- a bit set when the pointer of the start position is reached can thus provide the information that an initialization run is not necessary.
- the structure of a display device 10 is shown schematically in the figure.
- the display device 10 can, for example, be part of a combination instrument of a motor vehicle, the combination instrument of course having several of the display devices 10 and additionally further digital display devices and / or symbol fields.
- the display device 10 is an analog pointer instrument, wherein a pointer 12 is arranged on a drive axis 14 of a stepping motor 16 in a rotationally fixed manner.
- the stepper motor 16 can be controlled by means of a control circuit 18, which comprises a microprocessor 20 and a storage means 22.
- the stepper motor 16 and the control circuit 18 are shown in dashed lines here, since they are usually located on the back of a carrier plate 24, the carrier plate 24 having a scale 26 for reading a display position of the pointer 12.
- the pointer 12 is shown once in a starting position 28 and once in an actual position 30.
- a control signal is applied to the stepping motor 16 by means of the control circuit 18, so that the drive axis 14 of the stepping motor 16 changes its position accordingly.
- the pointer 28 is brought into a specific display position, so that a measurement value can be read by a viewer via the scale 26.
- the measured value itself is supplied by sensors of the motor vehicle (not shown), the corresponding control signals for the stepping motor 16 being provided via the microprocessor 20 of the control circuit 18.
- the storage means 22 which is, for example, a non-volatile memory (EEPROM), to be stored when the pointer 12 is not in its starting position 28 but in any actual position 30.
- EEPROM non-volatile memory
- an initialization of the stepping motor 16 is only necessary in the case when the pointer 12 is not in the starting position 28. Since the supply voltage for the display device 10 is usually only interrupted when the motor vehicle is parked after the ignition is switched off, the pointers 12 already reach their starting position 28 before the supply voltage is interrupted. Thus, when the supply voltage of the display device 10 is switched on, the pointer 12 will normally be in its starting position 28. Only in operating cases in which the supply voltage of the display device 10 is interrupted and the pointer 12 is in any actual position 30 which corresponds to a measurement signal supplied by a sensor of a motor vehicle electronics, for example a driving speed or a speed and so on, is the following An initialization run of the stepping motor 16 is necessary to switch the supply voltage back on.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Instrument Panels (AREA)
- Indicating Measured Values (AREA)
Abstract
The invention relates to a method for positioning a pointer of an indicator device, especially of a combined instrument in an automobile. Said pointer can be positioned on a scale by means of an electronically controlled stepper motor (16). According to the invention, an actual position (30) of the pointer (12) is scanned when the voltage supply for the display device (10) is switched on and the pointer (30) is only moved into the starting position (28) by means of the stepper motor (16) performing an initialisation run if said actual position (30) is different from said starting position (28).
Description
Verfahren zum Positionieren eines Zeigers einer AnzeigeeinrichtungMethod for positioning a pointer of a display device
Die Erfindung betrifft ein Verfahren zum Positionieren eines Zeigers einer Anzeigeeinrichtung, insbesondere eines Kombiinstrumentes in Kraftfahrzeugen.The invention relates to a method for positioning a pointer of a display device, in particular a combination instrument in motor vehicles.
Stand der TechnikState of the art
Es ist bekannt, in Kraftfahrzeugen Kombiinstrumente einzusetzen, die unter anderem analoge Anzeigemittel aufweisen. Hierbei wird ein Zeiger mittels eines Schrittmotors über einer Skalierung positioniert, so daß ein Meßwert ablesbar ist. Eine AnSteuereinheit des Kombiinstrumentes erhält hierbei von einer Fahrzeugelektronik ein Meßsignal geliefert, das von der AnSteuereinheit in Steuersignale für den Schritt- motor umgesetzt wird. Entsprechend der Position des Schrittmotors erhält der Zeiger seine Anzeigeposition.It is known to use instrument clusters in motor vehicles which have, among other things, analog display means. Here, a pointer is positioned over a scaling by means of a stepping motor, so that a measured value can be read. A control unit of the instrument cluster receives a measurement signal from vehicle electronics, which is converted by the control unit into control signals for the stepper motor. The pointer gets its display position according to the position of the stepper motor.
Beim Einschalten des Kombiinstrumentes, das heißt bei Verbinden mit einer Versorgungsspannung, ist derWhen the instrument cluster is switched on, i.e. when connecting to a supply voltage, the is
AnSteuereinheit des Kombiinstrumentes die Position des Schrittmotors und somit des Zeigers unbekannt. Es
bedarf daher einer Initialisierung des Schrittmotors, damit der Zeiger in eine definierte Startposition gefahren werden kann. Bekannt ist, den Schrittmotor bei Einschalten der Versorgungsspannung mit einem Steuersignal zu beaufschlagen, das ein Zurückfahren des Schrittmotors in die Startposition bewirkt. Da in der Regel beim Abstellen eines Kraftfahrzeuges die VersorgungsSpannung des Kombiinstrumentes erst unterbrochen wird, nachdem die Zündung ausgeschaltet ist, wird der Schrittmotor in der Regel durch die von der Kraftfahrzeugelektronik gelieferten Meßsignale, die bei Abschalten der Zündung und damit der Antriebsmaschine den Wert Null liefern, beispielsweise für Geschwindigkeit und Drehzahl, der Zeiger über den Schrittmotor bereits in seine Startposition (Nullstellung) gefahren. Somit stellt der Initialisierungslauf beim Einschalten der VersorgungsSpannung des Kombiinstrumentes eine unnötige Belastung des Schrittmotors dar, der zu einem erhöhten Verschleiß führt.Control unit of the instrument cluster, the position of the stepper motor and thus the pointer unknown. It therefore requires an initialization of the stepper motor so that the pointer can be moved to a defined starting position. It is known to apply a control signal to the stepper motor when the supply voltage is switched on, which causes the stepper motor to return to the starting position. Since the supply voltage to the instrument cluster is generally only interrupted after the ignition is switched off when a motor vehicle is switched off, the stepper motor is generally replaced by the measurement signals supplied by the motor vehicle electronics, which provide the value zero when the ignition and thus the drive machine are switched off. For example for speed and speed, the pointer has already moved to its starting position (zero position) via the stepper motor. Thus, the initialization run when the supply voltage of the instrument cluster is switched on places an unnecessary load on the stepper motor, which leads to increased wear.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Verfahren mit den im Anspruch 1 genannten Merkmalen bietet demgegenüber den Vorteil, daß ein Verschleiß des Schrittmotors minimiert werden kann. Dadurch, daß beim Einschalten der Versorgungs- Spannung für die Anzeigeeinrichtung eine Istposition des Zeigers (des Schrittmotors) abgefragt wird, und nur bei Abweichung der Istposition von einer Startposition des Zeigers der Zeiger in die Startposition gefahren wird, ist ein Initialisierungslauf lediglich
nur noch für den Fall notwendig, daß die Istposition des Zeigers von der Startposition abweicht . Somit werden alle Regelfälle, bei denen sich der Zeiger nach Abschalten der Verεorgungsspannung der Anzeige- einrichtung sowieso in der Startposition befindet, berücksichtigt, und in diesen Fällen kein Initialisierungslauf durchgeführt. Somit wird neben der Verbindung des Verschleißes des Schrittmotors eine Initialisierungszeit der Anzeigeeinrichtung wesentlich verkürzt. Darüber hinaus wird ein störender Einfluß des Initialisierungslaufes auf die Ansteuerschaltung der Anzeigeeinrichtung verhindert.The method according to the invention with the features mentioned in claim 1 offers the advantage that wear on the stepper motor can be minimized. Because an actual position of the pointer (of the stepping motor) is queried when the supply voltage for the display device is switched on, and the pointer is only moved into the start position if the actual position deviates from a starting position of the pointer, an initialization run is merely only necessary in the event that the actual position of the pointer deviates from the start position. Thus, all normal cases in which the pointer is in the start position anyway after the supply voltage of the display device has been switched off are taken into account, and in these cases no initialization run is carried out. Thus, in addition to the connection of the wear of the stepper motor, an initialization time of the display device is significantly reduced. In addition, a disruptive influence of the initialization run on the control circuit of the display device is prevented.
In bevorzugter Ausgestaltung der Erfindung ist vorge- sehen, daß das Erreichen der Startposition des Zeigers in einem nichtflüchtigen Speicher (EEPROM) abgelegt wird, und dieser nichtflüchtige Speicher beim Einschalten der Versorgungsspannung abgefragt wird. Somit kann ein bei Erreichen des Zeigers der Startpo- sition gesetztes Bit die Information liefern, daß ein Initialisierungslauf nicht notwendig ist. Diese Lösung ist einfach und sicher und ohne großen Aufwand zu realisieren und bietet die genannten Vorteile.In a preferred embodiment of the invention it is provided that the reaching of the starting position of the pointer is stored in a non-volatile memory (EEPROM) and this non-volatile memory is queried when the supply voltage is switched on. A bit set when the pointer of the start position is reached can thus provide the information that an initialization run is not necessary. This solution is simple and safe to implement without great effort and offers the advantages mentioned.
Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den übrigen, in den Unteransprüchen genannten Merkmalen.Further advantageous embodiments of the invention result from the other features mentioned in the subclaims.
Zeichnungdrawing
Die Erfindung wird nachfolgend in einem Ausführungs- beispiel anhand der zugehörigen Zeichnung, die eine
schematische Ansicht eines Zeigerinstrumentes zeigt, näher erläutert .The invention is described below in an exemplary embodiment with reference to the accompanying drawing, the one shows schematic view of a pointer instrument, explained in more detail.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In der Figur wird schematisch der Aufbau einer Anzeigeeinrichtung 10 gezeigt. Die Anzeigeeinrichtung 10 kann beispielsweise Bestandteil eines Kombiinstrumentes eines Kraftfahrzeuges sein, wobei das Kombiinstrument selbstverständlich mehrere der Anzeigeeinrichtungen 10 und zusätzlich weitere digitale Anzeigeeinrichtungen und/oder Symbolfelder aufweisen kann.The structure of a display device 10 is shown schematically in the figure. The display device 10 can, for example, be part of a combination instrument of a motor vehicle, the combination instrument of course having several of the display devices 10 and additionally further digital display devices and / or symbol fields.
Die Anzeigeeinrichtung 10 ist ein analoges Zeigerinstrument, wobei ein Zeiger 12 auf einer Antriebsachse 14 eines Schrittmotors 16 drehfest angeordnet ist. Der Schrittmotor 16 ist mittels einer Steuerschaltung 18, die ein Mikroprozessor 20 und ein Speichermittel 22 umfaßt, ansteuerbar. Der Schrittmotor 16 und die Steuerschaltung 18 sind hier gestrichelt dargestellt, da sie sich in der Regel auf der Rückseite einer Trägerplatte 24 befinden, wobei die Trägerplatte 24 eine Skalierung 26 zum Ablesen einer Anzeigeposition des Zeigers 12 aufweist.The display device 10 is an analog pointer instrument, wherein a pointer 12 is arranged on a drive axis 14 of a stepping motor 16 in a rotationally fixed manner. The stepper motor 16 can be controlled by means of a control circuit 18, which comprises a microprocessor 20 and a storage means 22. The stepper motor 16 and the control circuit 18 are shown in dashed lines here, since they are usually located on the back of a carrier plate 24, the carrier plate 24 having a scale 26 for reading a display position of the pointer 12.
In der in Figur 1 gezeigten Darstellung ist der Zeiger 12 einmal in einer Startposition 28 und einmal in einer Istposition 30 dargestellt.In the illustration shown in FIG. 1, the pointer 12 is shown once in a starting position 28 and once in an actual position 30.
Die Funktion der Anzeigeeinrichtung 10 ist allgemein bekannt, so daß sich eine detaillierte Beschreibung
erübrigt. Mittels der Ansteuerschaltung 18 wird der Schrittmotor 16 mit einem Steuersignal beaufschlagt, so daß die Antriebsachse 14 des Schrittmotors 16 seine Position entsprechend verändert. Hierdurch wird der Zeiger 28 in eine bestimmte Anzeigeposition gebracht, so daß für einen Betrachter über die Skalierung 26 ein Meßwert ablesbar ist. Der Meßwert selber wird von nicht dargestellten Sensoren des Kraftfahrzeuges geliefert, wobei über den Mikroprozessor 20 der Ansteuerschaltung 18 die entsprechenden Steuersignale für den Schrittmotor 16 bereitgestellt werden.The function of the display device 10 is generally known, so that there is a detailed description superfluous. A control signal is applied to the stepping motor 16 by means of the control circuit 18, so that the drive axis 14 of the stepping motor 16 changes its position accordingly. As a result, the pointer 28 is brought into a specific display position, so that a measurement value can be read by a viewer via the scale 26. The measured value itself is supplied by sensors of the motor vehicle (not shown), the corresponding control signals for the stepping motor 16 being provided via the microprocessor 20 of the control circuit 18.
Um eine exakte Anzeige mittels der Anzeigeeinrichtung 10 zu gewährleisten, muß sichergestellt sein, daß der Zeiger 12 im Ausgangszustand sich in seiner Startposition 28 befindet. Hierzu ist vorgesehen, daß in dem Speichermittel 22, das beispielsweise ein nichtflüchtiger Speicher (EEPROM) ist, gespeichert wird, wenn sich der Zeiger 12 nicht in seiner Startposition 28, sondern in einer beliebigen Istposition 30 befindet. Mit Verlassen der Startposition 28 - während des Anzeigebetriebes - wird ein Bit gleich 1 gesetzt. Gelangt der Zeiger 12 wieder in seine Startposition 28, wird dieses Bit gleich 0 gesetzt.In order to ensure an exact display by means of the display device 10, it must be ensured that the pointer 12 is in its starting position 28 in the initial state. For this purpose, provision is made for the storage means 22, which is, for example, a non-volatile memory (EEPROM), to be stored when the pointer 12 is not in its starting position 28 but in any actual position 30. When leaving the start position 28 - during the display operation - a bit is set to 1. When pointer 12 returns to its starting position 28, this bit is set to 0.
Bei einer Anzeigeeinrichtung 10 mit mehreren Zeigern 12 kann vorgesehen sein, daß jedem der Zeiger 12 ein eigener nichtflüchtiger Speicher zugeordnet ist, oder der Zustand Bit = 1 des Speichers 22 wird gesetzt, wenn wenigstens einer von mehreren Zeigern 12 sich nicht in seiner Startposition 28 befindet.
Bei Einschalten einer VersorgungsSpannung der Anzeigeeinrichtung 10 wird über den Mikroprozessor 20 der Speicher 22 abgefragt. Ist der Zustand Bit = 0 gegeben, ist klar, daß sich der beziehungsweise die Zei- ger 12 in ihrer Startposition 28 befinden, und ein Initialisierungslauf nicht notwendig ist. Ist hingegen der Zustand Bit = 1 gegeben, wird über den Mikroprozessor 20 ein Initialisierungslauf des Schrittmotors 16 ausgelöst, so daß der Zeiger 12 in seine Startposition 28 gefahren wird.In the case of a display device 10 with a plurality of pointers 12, it can be provided that each of the pointers 12 is assigned its own non-volatile memory, or the state Bit = 1 of the memory 22 is set if at least one of a plurality of pointers 12 is not in its starting position 28 . When a supply voltage of the display device 10 is switched on, the memory 22 is queried via the microprocessor 20. If the state Bit = 0 is given, it is clear that the pointer (s) 12 are in their starting position 28 and that an initialization run is not necessary. If, on the other hand, the state Bit = 1 is given, an initialization run of the stepping motor 16 is triggered via the microprocessor 20, so that the pointer 12 is moved into its starting position 28.
Hierdurch wird erreicht, daß eine Initialisierung des Schrittmotors 16 nur noch für den Fall notwendig ist, wenn sich der Zeiger 12 nicht in der Startposition 28 befindet. Da üblicherweise beim Abstellen eines Kraftfahrzeuges die Versorgungsspannung für die Anzeigeeinrichtung 10 erst unterbrochen wird, nachdem die Zündung ausgeschaltet ist, gelangen die Zeiger 12 bereits in ihre Startposition 28, bevor die Versor- gungsspannung unterbrochen ist. Somit wird in der Regel beim Einschalten der VersorgungsSpannung der Anzeigeeinrichtung 10 der Zeiger 12 regelmäßig sich in seiner Startposition 28 befinden. Nur bei Betriebsfällen, in denen die VersorgungsSpannung der Anzeigeeinrichtung 10 unterbrochen wird, und der Zeiger 12 sich in einer beliebigen Istposition 30 befindet, die einem von einem Sensor einer Kraftfahrzeugelektronik gelieferten Meßsignal entspricht, beispielsweise einer Fahrgeschwindigkeit oder einer Drehzahl und so weiter, ist beim nachfolgenden Wiedereinschalten der VersorgungsSpannung ein Initialisierungslauf des Schrittmotors 16 notwendig.
It is hereby achieved that an initialization of the stepping motor 16 is only necessary in the case when the pointer 12 is not in the starting position 28. Since the supply voltage for the display device 10 is usually only interrupted when the motor vehicle is parked after the ignition is switched off, the pointers 12 already reach their starting position 28 before the supply voltage is interrupted. Thus, when the supply voltage of the display device 10 is switched on, the pointer 12 will normally be in its starting position 28. Only in operating cases in which the supply voltage of the display device 10 is interrupted and the pointer 12 is in any actual position 30 which corresponds to a measurement signal supplied by a sensor of a motor vehicle electronics, for example a driving speed or a speed and so on, is the following An initialization run of the stepping motor 16 is necessary to switch the supply voltage back on.
Claims
1. Verfahren zum Positionieren eines Zeigers einer Anzeigeeinrichtung, insbesondere eines Kombiinstrumentes in Kraftfahrzeugen, wobei der Zeiger mittels eines elektrisch ansteuerbaren Schrittmotors über einer Skalierung positionierbar ist, dadurch gekennzeichnet, daß beim Einschalten der Versorgungsspannung für die Anzeigeeinrichtung (10) eine Istposition (30) des Zeigers (12) abgefragt wird, und nur bei Abweichung der Istposition (30) von einer Startposition (28) der Zeiger (12) über einen Initialisierungslauf des Schrittmotors (16) in die Startposition (28) gefahren wird.1. A method for positioning a pointer of a display device, in particular a combination instrument in motor vehicles, the pointer being positionable over a scaling by means of an electrically controllable stepping motor, characterized in that an actual position (30) of the display device (10) when the supply voltage is switched on Pointer (12) is queried, and only when the actual position (30) deviates from a start position (28) the pointer (12) is moved into the start position (28) via an initialization run of the stepping motor (16).
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Erreichen der Startposition (28) des Zeigers in einem nichtflüchtigen Speicher (22) abgelegt wird, und bei Initialisierung der Anzeigeeinrichtung (10) zunächst der Speicher (22) abgefragt wird.2. The method according to claim 1, characterized in that the reaching of the starting position (28) of the pointer is stored in a non-volatile memory (22), and when the display device (10) is initialized, the memory (22) is first queried.
3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß als nichtflüchtiger Speicher ein EEPROM verwendet wird.3. The method according to any one of the preceding claims, characterized in that an EEPROM is used as the non-volatile memory.
4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß bei Verlassen der Start-
posititon (28) durch den Zeiger (12) ein Bit = 1 im Speicher (22) gesetzt wird.4. The method according to any one of the preceding claims, characterized in that when leaving the start position (28) is set by the pointer (12) a bit = 1 in the memory (22).
5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß bei Erreichen der Start- posititon (28) durch den Zeiger (12) ein Bit = 0 im Speicher (22) gesetzt wird.5. The method according to any one of the preceding claims, characterized in that when the start position (28) is reached by the pointer (12) a bit = 0 is set in the memory (22).
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß bei einer Anzeigeeinrichtung (10) mit mehreren Zeigern (12) ein Bit = 1 gesetzt wird, wenn wenigstens einer der Zeiger seine Startposition (28) verläßt.
6. The method according to any one of the preceding claims, characterized in that in a display device (10) with a plurality of pointers (12) a bit = 1 is set when at least one of the pointers leaves its starting position (28).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737725.4 | 1997-08-29 | ||
| DE19737725A DE19737725A1 (en) | 1997-08-29 | 1997-08-29 | Method for positioning a pointer of a display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1999012171A2 true WO1999012171A2 (en) | 1999-03-11 |
| WO1999012171A3 WO1999012171A3 (en) | 1999-05-06 |
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ID=7840586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1998/002464 WO1999012171A2 (en) | 1997-08-29 | 1998-08-24 | Method for positioning a pointer of an indicator device |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19737725A1 (en) |
| WO (1) | WO1999012171A2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2001237121B2 (en) * | 2000-02-29 | 2005-01-27 | Australian Arrow Pty Ltd | Instrument reference system |
| AUPQ592700A0 (en) * | 2000-02-29 | 2000-03-23 | Australian Arrow Pty Ltd | Instrument reference system |
| JP3625272B2 (en) * | 2000-09-29 | 2005-03-02 | 矢崎総業株式会社 | Stepper motor initial setting device and initial setting method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4310060A1 (en) * | 1992-03-28 | 1993-09-30 | Noris Tachometerwerk | Electrical analogue display instrument with reset device - contains electronic restoring arrangement with energy store for stepper motor operation when operating voltage fails |
| DE19600687A1 (en) * | 1995-01-11 | 1996-07-18 | Yazaki Corp | Needle indicator device for e.g. vehicle speed indicator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0896533A (en) * | 1994-09-28 | 1996-04-12 | Sony Corp | Disk device |
| JPH09145412A (en) * | 1995-11-24 | 1997-06-06 | Nippon Seiki Co Ltd | Step motor type measuring instrument |
-
1997
- 1997-08-29 DE DE19737725A patent/DE19737725A1/en not_active Ceased
-
1998
- 1998-08-24 WO PCT/DE1998/002464 patent/WO1999012171A2/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4310060A1 (en) * | 1992-03-28 | 1993-09-30 | Noris Tachometerwerk | Electrical analogue display instrument with reset device - contains electronic restoring arrangement with energy store for stepper motor operation when operating voltage fails |
| DE19600687A1 (en) * | 1995-01-11 | 1996-07-18 | Yazaki Corp | Needle indicator device for e.g. vehicle speed indicator |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 096, no. 008, 30. August 1996 & JP 08 096533 A (SONY CORP), 12. April 1996 * |
| PATENT ABSTRACTS OF JAPAN vol. 097, no. 010, 31. Oktober 1997 & JP 09 145412 A (NIPPON SEIKI CO LTD), 6. Juni 1997 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999012171A3 (en) | 1999-05-06 |
| DE19737725A1 (en) | 1999-03-04 |
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