WO2004025236A2 - Assembly of a detection module and a control device - Google Patents
Assembly of a detection module and a control device Download PDFInfo
- Publication number
- WO2004025236A2 WO2004025236A2 PCT/EP2003/009538 EP0309538W WO2004025236A2 WO 2004025236 A2 WO2004025236 A2 WO 2004025236A2 EP 0309538 W EP0309538 W EP 0309538W WO 2004025236 A2 WO2004025236 A2 WO 2004025236A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measured value
- arrangement according
- converter
- analog
- signals
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title abstract 2
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000000969 carrier Substances 0.000 claims description 3
- 238000007781 pre-processing Methods 0.000 claims description 2
- 238000000053 physical method Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 108091006146 Channels Proteins 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/06—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/88—Pressure measurement in brake systems
Definitions
- the invention relates to an arrangement according to the preamble of claim 1 and its use according to claim 16.
- Integrated transducers to process bridge voltages in pressure sensors.
- Corresponding integrated measurement transducers are, for example, electronic components which contain customer-specific integrated circuits (ASIC) for processing the bridge voltages.
- ASIC customer-specific integrated circuits
- a transducer is provided for each pressure sensor element, which serves, among other things, to amplify the measuring bridge voltages of the pressure sensors and to convert them into analog signals which are used to transmit the electronic to an evaluation of the pressure and / or temperature information Unit (e.g. a brake control unit, ECU) are transmitted.
- ECU brake control unit
- the invention therefore relates to an arrangement according to claim 1.
- the arrangement according to the invention is distinguished, inter alia, by redundant measured value processing and data processing secured against errors.
- the arrangement is particularly suitable for safety-critical regulations in electronic motor vehicle braking systems, such as ABS, ESP, ASR, EHB etc., in which important parameters for the control processes of the brake system are derived from the pressure signals obtained.
- the integrated measurement transducer used in the arrangement according to the invention is provided for converting several analog sensor signals. Voltage signals from measuring bridges are particularly suitable as sensor signals. The sensor signals are converted into digital signals and can be transmitted to an external control unit. However, it is equally possible to convert the generated digital signals on the output side into analog signals.
- the measured value wall ler has circuit parts with which, in a manner known per se, relatively large deviations of the input-side analog signals of the measured value converter can be compensated for in order to eliminate tolerance-related sensor differences in the analog part.
- the compensation data used for this can be stored in one or more memory elements that can be erased multiple times, the memory elements required for this being arranged in the transducer outside, for example in the form of one or more separate modules, or preferably integrated in the circuit arrangement.
- the integration within the transducer is advantageous in that it results in cost advantages in mass production.
- a first compensation of the voltages picked up by the measuring bridges or of the supplied electrical supply signals is preferably carried out in the analog part within the measured value converter. In this way, influences of manufacturing differences of the pressure sensor elements on the measurement signal can be largely eliminated.
- the compensation takes place in particular in the analog part by means of compensation data which are stored in several registers.
- the data stored in the registers can be determined and stored in a memory immediately after the manufacture of the sensor module described below, which accommodates the sensor (s) in a structural unit, so that the data can be used for the later finishing in the motor vehicle and during the Operation of the motor vehicle are available.
- compensation data of the first type further “calibration data” or compensation data of the second type are also determined for the measured value converter in order to improve the further increase in the accuracy of the pressure sensor measured values.
- the calibration data can also be determined during the manufacture of the sensor module, but the sensor signal is cleared of any deviations. with the calibration data by the microcomputer of the control unit.
- the invention further relates to the use of the arrangement according to the invention in electronic brake systems for motor vehicles.
- Fig. 2 shows another example of an arrangement according to the invention and Fig. 3 shows the structure of an integrated transducer for use in the arrangement according to the invention.
- Measured value converter 2 can comprise a plurality of signal processing channels for processing the signals of a plurality of measuring bridges.
- the transducer comprises several channels, it can be provided according to a further preferred embodiment that the transducer has at least one, in particular two, analog multiplexers on the input side, which bundles the outputs of several sensors and feeds the inputs of channels 1 and 1 ' , In this way, the manufacturing costs of the arrangement can be reduced, however at the cost of the running time.
- the measured value converter 2 is connected via a serial peripheral interface 14 to a motor vehicle brake control device 8 designed as a separate structural unit.
- Brake control device 8 comprises a micro-computing unit 13 and a power component 3. Components 13 and 3 can also be integrated in a common component his.
- Control unit 8 controls the bus access of the circuit arrangement as bus master of the serial peripheral interface. 22 denotes the internal data bus of the control unit, which controls the main functions. Appropriate software algorithms are processed by microprocessor unit 13 to control the bus.
- the calibration data required for the pressure sensor system are stored in an external memory module 4 (EEPROM). Memory 4 and transducer 2 share a common data bus.
- EEPROM electrically erasable programmable read-only memory
- the bus is decoupled from the bus of the measured value converter by buffer 5.
- the physical connection of the control unit to the unit of the pressure sensors takes place via a plug connection which has electrical contacts 6. These contacts are preferably springs which are pressed onto opposite contact surfaces in order to produce a conductive connection.
- the pressure sensor module 7 is connected to the control unit housing 8 of the brake system.
- the sensor signals are transmitted digitally by the transducer 2 to the control unit 8 via corresponding signal lines 17 ... 20 and contacts 6.
- the data protocol or the selected modulation for the digital transmission of the sensor signals can be designed in a manner known per se. It is preferably an SPI protocol known per se.
- test information (checksums, parity, CRC, etc.) is formed when the compensation data or, in particular, the calibration data is stored.
- This test information is preferably stored in the memory together with the data. However, it is just as good lent the data to be stored several times to avoid memory errors or a multiple storage of data is combined with a corresponding test data method.
- column test data are preferably generated for each memory block (segment), in particular according to the known CRC method.
- line check data can also be created, for example parity bits or parity words.
- a half-bridge or a signal input is very particularly preferably assigned to each memory segment of the memory 4. If a data segment is faulty due to a memory error due to comparison with the block check information, the remaining segments remain valid. As a result, the sensory information remains available in the system for all connected sensors not affected by the error.
- Memory element 4 is selected by a selection signal (chip select).
- the selection can be made by a signal generated by the transducer via a bus command. After the storage element has been selected by the selection signal, the transducer no longer reacts to external bus access (eg to signals from the control unit). This state can be reset by changing the state of the selection signal.
- the arrangement can be designed such that the measured value converter cannot access the memory element (read / write). Access via the bus can then only take place via the control unit software.
- Another special feature of the arrangement according to the invention is that it is designed in such a way that the microcomputer 13 of the control unit always has the measured value converter under control.
- the measured value converter can include various operating modes or setting options, which enable a system test by the software of the control unit.
- the control unit's software controls all access to the bus.
- a test mode can be provided in the measured value converter, which enables a test of the measured value converter.
- the integrated measured value converter is preferably checked by the control device to avoid malfunctions by using a wide variety of test methods.
- the following variants for error checking are in particular provided individually or in any combination with one another:
- For checking the memory 10 test data are compared with the memory content of the memory 4.
- the registers 9 with the compensation data are read out in the single-channel operating mode and compared with the data in memory 10 or the data in memory 4. Register settings are specifically changed in order to check the influence of the change on the signal path.
- One, two, but also several transducers can be operated together in one brake system.
- the channels for a sensor signal are expediently divided between the two transducers 2, 2 'in such a way that high availability is guaranteed in all cases.
- the pressure sensors of the front axle can be placed on converter 2 and the pressure sensors of the rear axle can be placed on converter 2 '.
- all pressure data of an axis are still available to the system.
- the calibration data for both transducers are preferably stored in a common memory module 4. Each transducer then has its own means for controlling memory 4 via signal 15.
- Measured value converter 2 is connected via data lines (not shown) to compensation data memory 10, which is designed in particular as a RAM memory and whose data can be read or written via bus 14.
- the data in memory 10 are read by control unit 8 from external memory 4 and written to memory 10.
- Registers 9 for compensation data are also provided. With the values stored in the registers, the measured values of the two signal paths can be largely, but not completely, corrected analogously from tolerance-related deviations.
- the registers 9 are loaded from the memory 10 by the status machine 12.
- Through analog / digital Converter 11 converts the analog signals of channels 1 and 1 'into a digital signal.
- a / D converter 11 can be configured according to the desired function mode.
- the converted digital signals are output on bus 14, which is connected to A / D converter 11.
- the status machine 12 loads calibration data from the internal memory 10 into the registers 9.
- the channels can be selected by the software of the control device using appropriate configuration registers.
- Analog / digital converter 12 switches back and forth between the signal channels used and converts the pending analog signals into digital signals one after the other.
- the corresponding result registers are read out synchronously by the control unit 8.
- a predetermined channel sequence is maintained when processing the channels.
- a single-channel mode is provided.
- the single-channel mode of the analog / digital converter 12 only one channel is constantly converted by the analog / digital converter 12.
- the compensation data for the analog channel in the corresponding registers are only updated in internal memory 10.
- the software of the control device can then read out the settings of the registers for checking a correct condition.
- the registers can be changed via the serial peripheral interface 14 (FIG. 1) so that the influence on the analog channel can be checked. In this way, for example, modulation limits of the analog path can be measured.
- Control unit 8 can request a multi-channel or single-channel mode from the measured value converter at any time via bus 14 or can also interrupt ongoing measured value conversions.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Measuring Fluid Pressure (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10393178.3A DE10393178B4 (en) | 2002-08-29 | 2003-08-28 | Arrangement of a sensor module and a control unit |
EP03794959A EP1537396A2 (en) | 2002-08-29 | 2003-08-28 | Assembly of a detection module and a control device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10240546.8 | 2002-08-29 | ||
DE10240546 | 2002-08-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004025236A2 true WO2004025236A2 (en) | 2004-03-25 |
WO2004025236A3 WO2004025236A3 (en) | 2004-04-29 |
Family
ID=31983892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/009538 WO2004025236A2 (en) | 2002-08-29 | 2003-08-28 | Assembly of a detection module and a control device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1537396A2 (en) |
DE (1) | DE10393178B4 (en) |
WO (1) | WO2004025236A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004056106A1 (en) * | 2004-11-19 | 2006-05-24 | Continental Teves Ag & Co. Ohg | Pressure sensor e.g. wheatstone bridge circuit, positioning method for brake system of automobile, involves storing setting data of integrated circuit of positioning device and serial number of sensor in integrated circuit of control device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3943488A (en) * | 1974-07-16 | 1976-03-09 | Fischer & Porter Co. | Multiplex telemetering system |
US4493210A (en) * | 1981-07-02 | 1985-01-15 | Robert Bosch Gmbh | Anti-block control system test |
WO2000030909A1 (en) * | 1998-11-25 | 2000-06-02 | Kelsey-Hayes Company | Structure for mounting a cluster of pressure sensors upon an electro-hydraulic brake system control unit |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5070732A (en) * | 1987-09-17 | 1991-12-10 | Square D Company | Modular sensor device |
JPH1143038A (en) * | 1997-07-29 | 1999-02-16 | Aisin Seiki Co Ltd | Antilock brake control device |
-
2003
- 2003-08-28 DE DE10393178.3A patent/DE10393178B4/en not_active Expired - Lifetime
- 2003-08-28 WO PCT/EP2003/009538 patent/WO2004025236A2/en not_active Application Discontinuation
- 2003-08-28 EP EP03794959A patent/EP1537396A2/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3943488A (en) * | 1974-07-16 | 1976-03-09 | Fischer & Porter Co. | Multiplex telemetering system |
US4493210A (en) * | 1981-07-02 | 1985-01-15 | Robert Bosch Gmbh | Anti-block control system test |
WO2000030909A1 (en) * | 1998-11-25 | 2000-06-02 | Kelsey-Hayes Company | Structure for mounting a cluster of pressure sensors upon an electro-hydraulic brake system control unit |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 05, 31. Mai 1999 (1999-05-31) & JP 11 043038 A (AISIN SEIKI CO LTD), 16. Februar 1999 (1999-02-16) * |
See also references of EP1537396A2 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004056106A1 (en) * | 2004-11-19 | 2006-05-24 | Continental Teves Ag & Co. Ohg | Pressure sensor e.g. wheatstone bridge circuit, positioning method for brake system of automobile, involves storing setting data of integrated circuit of positioning device and serial number of sensor in integrated circuit of control device |
Also Published As
Publication number | Publication date |
---|---|
DE10393178B4 (en) | 2018-09-13 |
EP1537396A2 (en) | 2005-06-08 |
WO2004025236A3 (en) | 2004-04-29 |
DE10393178A5 (en) | 2010-09-09 |
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