EP1371045A1 - Device for data transmission between vehicle sensors and a processor in a controller - Google Patents
Device for data transmission between vehicle sensors and a processor in a controllerInfo
- Publication number
- EP1371045A1 EP1371045A1 EP02704577A EP02704577A EP1371045A1 EP 1371045 A1 EP1371045 A1 EP 1371045A1 EP 02704577 A EP02704577 A EP 02704577A EP 02704577 A EP02704577 A EP 02704577A EP 1371045 A1 EP1371045 A1 EP 1371045A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- data
- sensor
- interface module
- processor
- telegram
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000012432 intermediate storage Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
Definitions
- the invention is based on a device for
- Data telegrams can be received by several vehicle sensors and takes the data from the first data telegrams, reformatted them and then sends them on in second data telegrams to the processor within the control unit synchronously.
- the device according to the invention is therefore extremely flexible and expandable.
- Vehicle sensors and a processor of a control unit possible.
- the data field of the second L5 data telegram is possibly filled with zeros if the sensor contained less data in the respective data telegram than the data field has space.
- the same data telegram format can therefore advantageously always be used for the processor. This leads to simplified data processing.
- a memory of the interface module is present, which is used for the intermediate storage of sensor data, so that
- a processor can retrieve old or new sensor data. This is particularly advantageous if a sensor fails and the previous sensor data are still available for further processing. This case can occur in particular in the event of a crash, in which in the vehicle
- peripherally arranged vehicle sensors can be damaged by an impact.
- the interface module receives the data telegrams from the 35 vehicle sensors in 13-bit data frames and thereby counts the edges of the data telegrams in order to recognize the data telegrams.
- the vehicle sensors are advantageously supplied with electrical energy by the interface module, the data transmission then being used by a current modulation on the direct current serving for energy supply.
- the current modulation is less sensitive to EMC problems.
- Manchester coding is also used so that only two different current levels are used.
- FIG. 1 shows a block diagram of the device according to the invention
- FIG. 2 shows a flow diagram of a method according to the invention
- FIG. 3 shows a data telegram frame of a sensor
- FIG. 4 shows the assignment of the data to an SPI data field
- FIG. 5 shows an SPI data frame
- FIG. 6 shows an SPI line
- an interface module which receives the individual data telegrams from the vehicle sensors and reformats the data into SPI (Serial Peripheral Interface) data telegrams, in order then to receive them in such SPI data telegrams to transfer the processor.
- SPI Serial Peripheral Interface
- Interface module advantageously connected to a memory that temporarily stores sensor data and an age bit enables the processor to select whether the current sensor data or the previous sensor data are transmitted to it.
- the SPI data telegrams are therefore not only transmitted from the interface module to the processor, but also vice versa.
- a master Data transmission between a master, a processor, and several slaves, these are the individual components in a control device such as the interface component according to the invention or an ignition circuit control, which are used for monitoring and
- the SPI transmission is a bidirectional and synchronous transmission.
- FIG. 6 shows an SPI line which itself has five individual lines. Since it is a synchronous transmission, there is a clock line with Clk
- the MOSI (master-out-slave-in) line is available for data transmission from the master to a slave
- MISO (master-in-slave-out) line is available for data transmission from a slave to the master
- an enable line here marked with EN, is used.
- the SPI line starts from the master and then branches to the individual slaves, but the SPI line is always the five individual ones
- FIG. 1 shows a block diagram of the device according to the invention.
- a sensor 1 for example an acceleration sensor, is a peripheral sensor via a data output to a first data input Interface module 3 connected.
- a sensor 2, here a pressure sensor, is connected to the interface module 3 via a second input of the interface module 3.
- the interface module 3 has a memory 5 4. Via a first data input / output
- Interface module 3 connected to a processor 5.
- An SPI line 6 is used here.
- the SPI line 6 also branches from the processor 5 to an ignition circuit control 51.
- Ignition circuit control 51 and the memory 4 are elements of a control unit 7.
- the control unit 7 is used here for the control of restraint systems. However, other areas of application are also conceivable.
- the interface module 3 has means for data transmission and means for signal processing in order to be able to perform the reformatting task. There is a synchronization, a sequence control and the
- the interface module 3 has a current source in order to supply the vehicle sensors 1 and 2 with electrical energy.
- connection to sensors 1 and 2 can also be implemented via a bus, wherein in addition to sensors 1 and 2, further sensors can also be connected to interface module 3.
- the sensors 1 and 2 transmit their sensor data asynchronously in data telegrams to the interface module 3, which takes the useful data from these data telegrams 50 and reformats them into SPI data telegrams, which are then transmitted to the processor 5 via the SPI line 6.
- Sensors 1 and 2 begin their asynchronous data transmission as soon as they are supplied with energy.
- the energy supply takes place here via the lines from the interface module 3 sensors 1 and 2 instead.
- a direct current is used here, on which the sensors then modulate their data.
- Manchester coding is used, in which switching between two current levels takes place. Apart from the energy supply, there is therefore only one unidirectional data transmission from sensors 1 and 2 to interface module 3.
- the interface module 3 takes an L0 intermediate storage of the received sensor data
- FIG. 2 shows the flow of the device according to the invention as a flow chart.
- Method step 8 the sensors 1 and 2 asynchronously send their sensor data to the interface module 3 in the first data telegrams after they have been supplied with electrical energy via the line via which the data telegrams are sent. Accordingly, there is a Powerline data transmission.
- the interface module 3 recognizes the individual data telegrams by counting the edges of the pulses. It is possible here that the interface module 3 is informed by a further 50 signals which sensors send data telegrams.
- the interface module 3 stores the sensor data in the memory 4, wherein it stores the current sensor value and the sensor value for each sensor 1 and 2 saves the previous sensor value.
- method step 14 it is checked whether the latest sensor data or the previous sensor data from the memory 4 in SPI frames are to be transmitted synchronously to the processor 5 via the SPI line 6. This is recognized by whether or not processor 5 has set an age bit via an SPI data telegram via the MOSI line. If this is the case, then interface module 3 fetches the latest data from memory 4 in method step 16. If this is not the case, then in method step 15 the
- Interface module 3 the previous sensor data from memory 4.
- Interface module 3 transmits the sensor data into the data fields of SPI frames and, if necessary, fills spaces in the SPI data field with zeros.
- the zeros are recognized by processor 5 as empty information.
- the transmission of the selected sensor data takes place in an SPI data telegram.
- the processor 5 processes the sensor data thus transmitted, for example whether the restraint systems are to be activated or not.
- the processor 5 here calculates the triggering algorithm for the connected restraint systems. If the sensor data indicate a crash, the restraint systems are actuated in accordance with the crash severity, which can also be derived from the sensor data.
- FIG. 3 shows a data frame that is transmitted from sensor 1 or sensor 2 to interface module 3.
- the data frame consists of 13 bits and is divided in the following way: First, two start bits marked with S1 and S2 are provided, on the 10 data bits follow that include the acceleration data. The data bits are numbered DO to D9. The data frame is terminated by a parity bit
- a bit duration is provided here, for example, with 8 microseconds, while the time t tran is specified with 88 microseconds and the total time of the data telegram t pas is specified with 28 microseconds.
- Manchester coding is carried out, with each bit duration being divided into two equally long intervals.
- a logical 1 is represented by the fact that the current is high in the first half and low in the second half.
- a logical 0, on the other hand, is transmitted in that the current is first low and then high. This scheme guarantees that each bit duration is one
- FIG. 4 shows how the seven data bits of a data telegram from a sensor, here sensor 2, are transmitted into the 10 data bits of the SPI data field. Since the SPI data field has two bits more than the 8 data of the
- Sensor data telegram the first two bits are set with zeros. It must be ensured that the data telegrams from the sensors each have fewer or at most as many data bits as the SPI data telegrams have.
- Such a data telegram of an SPI data frame is shown in FIG. It starts with a start bit SI followed by a synchronization bit 15, which is set with a 1.
- Bits 14 and 13 form the channel address, while bit 12 is the age bit.
- the age bit is set to 0 and means that the sensor is the latest Requests sensor value from the interface module 3.
- Bits 11 and 10 are further formatting data, which are then followed by the 10 data bits that have the actual sensor data.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Air Bags (AREA)
- Dc Digital Transmission (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10111265A DE10111265B4 (en) | 2001-03-09 | 2001-03-09 | Device for data transmission between vehicle sensors and a processor of a control device |
DE10111265 | 2001-03-09 | ||
PCT/DE2002/000069 WO2002073568A1 (en) | 2001-03-09 | 2002-01-11 | Device for data transmission between vehicle sensors and a processor in a controller |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1371045A1 true EP1371045A1 (en) | 2003-12-17 |
EP1371045B1 EP1371045B1 (en) | 2013-09-25 |
Family
ID=7676794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02704577.2A Expired - Lifetime EP1371045B1 (en) | 2001-03-09 | 2002-01-11 | Device for data transmission between vehicle sensors and a processor in a controller |
Country Status (5)
Country | Link |
---|---|
US (1) | US6665593B2 (en) |
EP (1) | EP1371045B1 (en) |
JP (1) | JP4065783B2 (en) |
DE (1) | DE10111265B4 (en) |
WO (1) | WO2002073568A1 (en) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7191269B2 (en) * | 2003-07-30 | 2007-03-13 | Delphi Technologies, Inc. | Method for multiple sensors to communicate on a uni-directional bus |
DE10358974A1 (en) * | 2003-12-16 | 2005-07-28 | Infineon Technologies Ag | SPI module e.g. for use in occupant protection systems of motor vehicles, has serial command input and serial data output |
DE102004044467A1 (en) * | 2004-09-15 | 2006-03-30 | Robert Bosch Gmbh | Method for processing sensor data |
DE102004044466A1 (en) * | 2004-09-15 | 2006-03-30 | Robert Bosch Gmbh | Method for processing sensor data |
DE102005031344A1 (en) * | 2005-07-05 | 2007-01-11 | Robert Bosch Gmbh | control unit |
DE102005036050B4 (en) | 2005-08-01 | 2019-03-07 | Robert Bosch Gmbh | Control device for controlling personal protective equipment |
US7533106B2 (en) * | 2005-09-09 | 2009-05-12 | Quickfilter Technologies, Inc. | Data structures and circuit for multi-channel data transfers using a serial peripheral interface |
WO2007047359A2 (en) * | 2005-10-14 | 2007-04-26 | Carrier Web Llc | System and method for real-time management of mobile resources |
DE102006018975A1 (en) * | 2006-01-19 | 2007-08-02 | Conti Temic Microelectronic Gmbh | Control method for operating a controllable vehicle device like a vehicle's passenger protection system uses sensors to detect a vehicle's operating data |
US7348915B2 (en) * | 2006-07-19 | 2008-03-25 | Quickfilter Technologies, Inc. | Programmable digital filter system |
DE102006037731A1 (en) * | 2006-08-11 | 2008-02-14 | Röder, Roland | Monitoring system e.g. for motor vehicle, has central PC module which receives information from several sensors arranged on vehicle and which is connected to storage device |
DE102007024737A1 (en) * | 2007-05-25 | 2008-11-27 | Robert Bosch Gmbh | Data transfer method between master and slave devices |
US8360904B2 (en) | 2007-08-17 | 2013-01-29 | Adidas International Marketing Bv | Sports electronic training system with sport ball, and applications thereof |
US8221290B2 (en) | 2007-08-17 | 2012-07-17 | Adidas International Marketing B.V. | Sports electronic training system with electronic gaming features, and applications thereof |
US8702430B2 (en) | 2007-08-17 | 2014-04-22 | Adidas International Marketing B.V. | Sports electronic training system, and applications thereof |
DE102008044776B4 (en) | 2008-08-28 | 2022-01-05 | Bayerische Motoren Werke Aktiengesellschaft | Electric instrument cluster in a motor vehicle |
DE102010061734B4 (en) * | 2010-11-22 | 2020-03-12 | Continental Automotive Gmbh | Data communication interface for data communication between a bus system and a microcontroller |
TW201222274A (en) * | 2010-11-30 | 2012-06-01 | Inventec Corp | Computer chassis system |
DE102012203968A1 (en) * | 2012-03-14 | 2013-09-19 | Robert Bosch Gmbh | Multi-channel sensor unit and associated operating method |
DE102014207762A1 (en) * | 2014-04-24 | 2015-10-29 | Continental Teves Ag & Co. Ohg | Universal PSI5 interface for asynchronous and synchronous data transmission |
GB2546063B (en) * | 2015-11-16 | 2021-11-17 | Bytec Healthcare Ltd | Programmable power module for mobile cart |
DE102018132024A1 (en) | 2018-12-13 | 2020-06-18 | Valeo Schalter Und Sensoren Gmbh | Network communication system with bidirectional current modulation for data transmission |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE250698C (en) * | ||||
US4023753A (en) * | 1974-11-22 | 1977-05-17 | International Standard Electric Corporation | Vehicle control system |
CA2086449C (en) | 1992-01-06 | 2000-03-07 | Steven W. Rogers | Computer interface board for electronic automotive vehicle service |
DE19757195A1 (en) | 1997-12-22 | 1999-06-24 | Philips Patentverwaltung | Method for transmitting an asynchronous data stream over a synchronous data bus, and circuit arrangement for carrying out the method |
-
2001
- 2001-03-09 DE DE10111265A patent/DE10111265B4/en not_active Expired - Fee Related
-
2002
- 2002-01-11 US US10/276,152 patent/US6665593B2/en not_active Expired - Lifetime
- 2002-01-11 WO PCT/DE2002/000069 patent/WO2002073568A1/en active Application Filing
- 2002-01-11 EP EP02704577.2A patent/EP1371045B1/en not_active Expired - Lifetime
- 2002-01-11 JP JP2002572143A patent/JP4065783B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO02073568A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2004519058A (en) | 2004-06-24 |
US20030171853A1 (en) | 2003-09-11 |
US6665593B2 (en) | 2003-12-16 |
DE10111265A1 (en) | 2002-09-12 |
DE10111265B4 (en) | 2005-12-01 |
JP4065783B2 (en) | 2008-03-26 |
WO2002073568A1 (en) | 2002-09-19 |
EP1371045B1 (en) | 2013-09-25 |
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