EP1317696A1 - Device for activating an electronic control unit - Google Patents
Device for activating an electronic control unitInfo
- Publication number
- EP1317696A1 EP1317696A1 EP01971669A EP01971669A EP1317696A1 EP 1317696 A1 EP1317696 A1 EP 1317696A1 EP 01971669 A EP01971669 A EP 01971669A EP 01971669 A EP01971669 A EP 01971669A EP 1317696 A1 EP1317696 A1 EP 1317696A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- analog
- analog coding
- coding means
- deactivation
- control
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
- H03M11/22—Static coding
- H03M11/24—Static coding using analogue means, e.g. by coding the states of multiple switches into a single multi-level analogue signal or by indicating the type of a device using the voltage level at a specific tap of a resistive divider
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
- G05B19/0425—Safety, monitoring
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21006—Detect position switches, connect resistances, analog value gives position
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25117—Resistors, value, combination defines a digital value
Definitions
- the invention relates to a device for activating a control device according to the preamble of the independent claim.
- several operating elements are read in analogously to save lines in a motor vehicle.
- different voltages are generated at an analog input by connecting the respective control elements with different resistors in series with a resistor used in the control unit.
- the resistor in the control unit forms a voltage divider together with the resistor activated via the respective control element.
- the current state of the switching means and the associated operating elements can be detected on the basis of the voltage thus established.
- the wake-up process of a control device which is in idle mode can be initiated in order to start it up.
- an actuation process of the control element could be recognized via a comparator or with the aid of an analog-digital converter and a downstream microcontroller. In the latter case, the microcontroller would either have to remain switched on permanently for voltage evaluation or be woken up regularly. This is associated with high additional effort.
- an actuation is recognized in connection with a comparator, the problem arises that voltage fluctuations, 5 component tolerances, climatic influences or aging and contamination shift the read level so far that a clear detection of a signal change does not affect the whole Lifetime can be ensured.
- contamination of the control element which manifests itself, for example, in a parasitic parallel resistance to the actual switching means, leads to problems with reliable actuation detection.
- the device according to the invention for activating a control device has at least one control element that can be actuated by a user. At least one analog coding means is assigned to this control element in order to actuate the operating element.
- deactivation means are provided for generating an activation signal for a control device, which deactivate the analog coding means and instead effect digital, preferably binary coding of the control element. Thanks to the clear,
- An actuation of the control element can also be reliably recognized in the digital evaluation if different voltage levels or aging processes would significantly influence an analog-coded signal.
- a comparator can be used for evaluation
- the output signal influenced by the control element compared with a fixed limit.
- the quiescent current requirement can be reduced by dispensing with a microcontroller for signal evaluation.
- an electrical resistor is provided as an analog coding means, for the deactivation of which a switching means or a diode are connected in parallel. If the control unit is in normal operation, the control elements are coded analogously. At rest
- L5 not all analog coding means are deactivated it could be provided, for example, to short-circuit only the high-resistance resistors. This ensures that when the control element is actuated, a sufficiently high voltage level for further evaluation for a possible one
- a polarity reversal means is provided for the purpose of deactivating the analog coding means, which in the idle state of the control unit switches the diode in
- FIG. 1 shows a device according to the prior art
- FIG. 2 shows a first
- FIG. 1 A device according to the prior art is described in FIG.
- the four control elements 31 to 34 shown as examples are coded analogously with resistors 21 to 24 connected in series for this purpose.
- connection is on the one hand via a resistor 12 to a
- control device 20 can be operated in a normal mode and in an idle mode.
- the idle mode is characterized, for example, by a restricted operating mode which therefore requires little or no electricity.
- the control elements 31 to 34 can be contaminated lead to a parasitic parallel resistor 16, which occurs, for example, on all operating elements 31 to 34.
- switching means 41 to 44 are provided as deactivation means for the analog coding 21 to 24.
- the first switching means 41 is connected in parallel to the first resistor 21
- the second switching means 42 is connected in parallel to the second resistor 22 and so on. Otherwise the arrangement corresponds to that of FIG. 1.
- diodes 51 to 54 are provided as deactivation means.
- the first diode 51 is in parallel with the first resistor 21, the second diode 52 with the second resistor 22 and so on
- An output signal 11 arrives at an analog input of the control device 20, which is not shown in detail.
- the exemplary embodiment according to FIG. 4 differs from that of FIG. 3 only in that the polarity reversal means 60 reverse the polarity of the diodes 51 to 54 in such a way that they are now operated in the forward direction. They thus serve as deactivation means for the analog coding 21 to
- the current now flows not through the resistors 21 to 24, but via the diodes 51 to 54.
- This operating mode is provided for the idle mode of the control device 20.
- the output signal 11 now reaches a comparator 62 which, depending on the comparison with a reference voltage 64 a binary output signal for the microcontroller 19 is generated to activate it.
- FIG. 1 an analog resistance coding for a number of control elements 31 to 34 is shown.
- the operating elements 31 to 34 are wired in parallel with the respective resistors 21 to 24 connected in series.
- the resistance values of the resistors 21 to 24 are chosen differently.
- a voltage level which is characteristic of this control element 31 to 34 is achieved via the voltage divider, formed from the resistor 12 and the respectively activated resistors 21 to 24.
- This characteristic voltage level is analog to the analog value - / Digital converter 18 available.
- the microcontroller 19 can recognize, for example by comparison with characteristic voltage levels, which or which of the operating elements 31 to 34 has been actuated. Corresponding functional sequences are initiated depending on the actuation. This described functionality takes place during normal operation of the control unit 20.
- aging processes can cause parasitic
- Parallel resistors 16 occur. Since the microcontroller 19 ensures a high degree of flexibility, aging processes and thus shifting voltage levels can be learned for normal operation. When the control device 20 is in idle mode, however, the microcontroller 19 should be deactivated in order to reduce the quiescent current requirement. Other, safe evaluation methods are then required to identify an actuation of an operating element 31 to 34, in order to activate the control unit 20 when an operating element 31 to 34 is actuated, that is, from the idle mode to the normal mode. bring painting operation. This is described in connection with FIGS. 2 to 4.
- the 5 switching means 41 to 44 are provided as deactivation means, which are connected in parallel to the respective resistor 21 to 24. During normal operation of the control unit 20, they are opened, so that the functionality of analog coding of the operating elements 31 to 34 already discussed in connection with FIG. 1 is achieved
- L5 log coding means the voltage change increases when actuating an operating element 31 to 34 to a greater extent than would be the case if the analog coding means 21 to 24 were still activated.
- the output signal 11 can be compared, for example, by the comparator 62 with a reference voltage 64.
- the reference voltage 64 is selected such that when one of the operating elements 31 to 34 is actuated, it is surely exceeded.
- control element 31 to 34 changes its state when any control element 31 to 34 is actuated, as a result of which the microcontroller 19 and thus the control device 20 are awakened.
- a door handle contact of a motor vehicle could be provided as control element 31 to 34. So with the door
- diodes 51 to 54 are provided as deactivation means. These essentially meet the same requirements as that
- the diodes 51 to 54 are polarized in the blocking direction, so that the analog coding desired in normal operation of the control unit 20 is available. However, if the control unit 20 is in the idle mode, the diodes 51 to 54 are in the on state.
- L5 polarized. They thus bridge resistors 21 to 24 to deactivate them. This is achieved by the polarity reversal means 60. These could, for example, have appropriate switching means in order to ensure the desired polarity reversal. One out of four is suitable for this
- 0 switching means existing bridge circuit.
- the polarity reversal means 60 could be integrated in the control unit 20.
- the microcontroller 19 can control the deactivation or activation of the analog coding depending on a loading
- the "ignition on / off” signal is also suitable for this purpose. If the vehicle is switched off using the "ignition off” signal, this signal can be used to trigger the deactivation of the analog coding. No later than
- each of the resistors 21 to 24 must be short-circuited. However, it is particularly advantageous if the resistors 21 to 24 have a relatively high resistance, in contrast to the dirt resistors / capacitive parallel resistors 16.
- the evaluation can preferably be carried out by a comparator 62.
- the possibility of using an analog / digital converter 18 with a downstream microcontroller 19 is also conceivable. Even then, the evaluation reliability increases.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10044087 | 2000-09-07 | ||
DE10044087A DE10044087A1 (en) | 2000-09-07 | 2000-09-07 | Device for activating a control device |
PCT/DE2001/003302 WO2002021223A1 (en) | 2000-09-07 | 2001-08-29 | Device for activating an electronic control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1317696A1 true EP1317696A1 (en) | 2003-06-11 |
Family
ID=7655298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01971669A Withdrawn EP1317696A1 (en) | 2000-09-07 | 2001-08-29 | Device for activating an electronic control unit |
Country Status (5)
Country | Link |
---|---|
US (1) | US7109892B2 (en) |
EP (1) | EP1317696A1 (en) |
AU (1) | AU2001291623A1 (en) |
DE (1) | DE10044087A1 (en) |
WO (1) | WO2002021223A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10341947A1 (en) * | 2003-07-03 | 2005-01-20 | Valeo Schalter Und Sensoren Gmbh | Switch field, especially for a vehicle, comprises a number of switch modules linked by a bus system to a control unit via which the switches are controlled |
DE10361342A1 (en) * | 2003-12-18 | 2005-07-14 | Valeo Schalter Und Sensoren Gmbh | switch module |
DE112006003857T5 (en) * | 2006-04-21 | 2009-04-09 | Razer (Asia-Pacific) Pte. Ltd. | Anti-ghost generation keyboard |
US8471733B2 (en) * | 2006-06-20 | 2013-06-25 | Qualcomm Incorporated | Two-wire connection to a key matrix in a mobile device |
DE102007010591B4 (en) * | 2007-03-05 | 2011-06-22 | Texas Instruments Deutschland GmbH, 85356 | Switch state detector |
EP2290819A1 (en) * | 2009-08-19 | 2011-03-02 | ST-Ericsson (France) SAS | Node management of an electronic circuit component |
DE102014211107A1 (en) * | 2014-06-11 | 2015-12-17 | Robert Bosch Gmbh | Configurable integrated circuit, controller and method of configuration |
DE102014019161A1 (en) * | 2014-12-19 | 2016-06-23 | Audi Ag | Method for identifying an operating device of a vehicle and operating device for a vehicle |
US10502786B2 (en) * | 2016-11-18 | 2019-12-10 | GM Global Technology Operations LLC | Vehicle including multiple analog switch monitoring system with simultaneous switch-state detection |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4016483A (en) * | 1974-06-27 | 1977-04-05 | Rudin Marvin B | Microminiature integrated circuit impedance device including weighted elements and contactless switching means for fixing the impedance at a preselected value |
GB2114341B (en) * | 1982-01-30 | 1985-04-11 | Ferranti Ltd | Monitoring system |
GB2117150B (en) * | 1982-02-26 | 1986-03-19 | Morrison John M | Intruder alarm system |
JPS58213330A (en) * | 1982-06-07 | 1983-12-12 | Victor Co Of Japan Ltd | Key input discriminating device |
EP0264884B2 (en) * | 1986-10-20 | 1996-12-18 | Matsushita Electric Industrial Co., Ltd. | Key input device |
US4918634A (en) * | 1987-02-23 | 1990-04-17 | Minolta Camera Kabushiki Kaisha | Key input apparatus |
US4817010A (en) * | 1987-03-02 | 1989-03-28 | Mars Incorporated | Vending machine control with improved vendor selector switch detection and decoding apparatus |
US4884070A (en) * | 1988-04-04 | 1989-11-28 | California Institute Of Technology | Method and apparatus for multiplexing switch signals |
DE3907432C2 (en) * | 1989-03-08 | 1995-03-09 | Miele & Cie | Control arrangement with a microcomputer for household appliances |
FR2653279B1 (en) * | 1989-10-13 | 1994-06-17 | Jaeger | INFORMATION ENCODING DEVICE, PARTICULARLY FOR MOTOR VEHICLE SWITCHES. |
US5146172A (en) * | 1990-08-15 | 1992-09-08 | Sundstrand Corp. | Engine identification system |
KR930008505Y1 (en) * | 1991-05-04 | 1993-12-22 | 주식회사 금성사 | Key input circuit of micro computer |
US5424731A (en) * | 1991-06-24 | 1995-06-13 | The United States Of America As Represented By The United States Department Of Energy | Remote two-wire data entry method and device |
IT1255407B (en) * | 1992-07-03 | 1995-10-31 | Bticino Spa | CONFIGURATOR DEVICE FOR ELECTRONIC MICROCONTROLLER UNITS |
US5699857A (en) * | 1993-11-22 | 1997-12-23 | Chrysler Corporation | Vehicle climate control multiplex system |
US5939998A (en) * | 1995-12-15 | 1999-08-17 | Ut Automotive Dearborn, Inc. | System and method for reducing quiescent current in a microcontroller |
US6178388B1 (en) * | 1998-11-13 | 2001-01-23 | Qualcomm Incorporated | Method and apparatus for calibrating a resistive ladder switching matrix |
US6970752B1 (en) * | 2000-05-17 | 2005-11-29 | Hewlett-Packard Development Company, L.P. | Method and apparatus for detecting switch closures |
US6639523B2 (en) * | 2001-01-17 | 2003-10-28 | Nokia Corporation | Resistive keyboard with status keys |
-
2000
- 2000-09-07 DE DE10044087A patent/DE10044087A1/en not_active Ceased
-
2001
- 2001-08-29 AU AU2001291623A patent/AU2001291623A1/en not_active Abandoned
- 2001-08-29 WO PCT/DE2001/003302 patent/WO2002021223A1/en active Application Filing
- 2001-08-29 EP EP01971669A patent/EP1317696A1/en not_active Withdrawn
- 2001-08-29 US US10/129,684 patent/US7109892B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0221223A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002021223A1 (en) | 2002-03-14 |
US7109892B2 (en) | 2006-09-19 |
AU2001291623A1 (en) | 2002-03-22 |
US20030015920A1 (en) | 2003-01-23 |
DE10044087A1 (en) | 2002-04-04 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20030407 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
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RBV | Designated contracting states (corrected) |
Designated state(s): DE ES FR GB |
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17Q | First examination report despatched |
Effective date: 20090324 |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: G05B 19/042 20060101ALI20110913BHEP Ipc: H03M 11/24 20060101AFI20110913BHEP |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20120301 |