EP1371045B1 - Dispositif de transmission de donnees entre des capteurs de vitesse de vehicule et un processeur d'un appareil de commande - Google Patents

Dispositif de transmission de donnees entre des capteurs de vitesse de vehicule et un processeur d'un appareil de commande Download PDF

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Publication number
EP1371045B1
EP1371045B1 EP02704577.2A EP02704577A EP1371045B1 EP 1371045 B1 EP1371045 B1 EP 1371045B1 EP 02704577 A EP02704577 A EP 02704577A EP 1371045 B1 EP1371045 B1 EP 1371045B1
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EP
European Patent Office
Prior art keywords
data
sensor
interface module
processor
sensors
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Expired - Lifetime
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EP02704577.2A
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German (de)
English (en)
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EP1371045A1 (fr
Inventor
Jens Otterbach
Peter Taufer
Harald Tschentscher
Davor Lukacic
Bernhard Straub
Michael Ulmer
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems

Definitions

  • the invention relates to a device for data transmission between vehicle sensors and a processor of a control device according to the preamble of the independent claim.
  • a general computer that connects to vehicle sensors via an interface unit.
  • the data from the vehicle sensors are preprocessed by the interface unit and stored in a memory from which the general computer can extract the data.
  • Out EP 924 622 A a converter circuit is known which allows asynchronous data transmission in a synchronous data transmission in a vehicle, wherein the synchronous data transmission is carried out, for example, by a synchronous bus. If not all bits are occupied by user data in a data telegram, they are padded by zeros.
  • the inventive device for data transmission between vehicle sensors and a processor of a control device with the features of the independent claim has the advantage that an interface module is present, the first data telegrams from multiple vehicle sensors can receive and extracts the data from the first data telegrams, reformatted and in second Data telegrams to the processor within the controller synchronously forwarded. This makes it possible for different sensors to receive data at the same time the control unit to be transmitted, with different formats for the individual data messages between the interface module and the sensors can be used.
  • the device according to the invention is therefore extremely flexible and expandable.
  • a memory of the interface module is present, which is used for the buffering of sensor data, so that a processor can retrieve old or new sensor data. This is particularly advantageous if a sensor fails and thus the previous sensor data are still available for further processing. This case can occur in particular in the event of a crash in which vehicle sensors arranged peripherally in the vehicle are damaged by an impact.
  • the data field of the second data telegram is optionally filled with zeros if less data was contained in the respective data telegram from the sensor than the data field has space. This advantageously always the same data telegram format for the processor can be used. This leads to a simplified data processing.
  • the interface module receives the data telegrams from the vehicle sensors in 13-bit data frames and thereby counts out the edges of the data telegrams in order to recognize the data telegrams.
  • the vehicle sensors are advantageously supplied by the interface module with electrical energy, in which case the data transmission is used by a current modulation on the serving for energy supply DC power.
  • the current modulation is less sensitive to EMC problems.
  • a Manchester encoding is used so that only two different levels of current are used.
  • FIG. 1 a block diagram of the device according to the invention
  • FIG. 2 a flow chart of a method according to the invention
  • FIG. 3 a data telegram frame of a sensor
  • FIG. 4 the assignment of the data to an SPI data field
  • FIG. 5 an SPI data frame
  • FIG. 6 an SPI line.
  • an interface module is provided according to the invention, which receives the individual data telegrams from the vehicle sensors and reformats the data in SPI (Serial Peripheral Interface) data telegrams to then in such SPI data telegrams to transfer the processor.
  • SPI Serial Peripheral Interface
  • the interface module is advantageously connected to a memory which temporarily stores sensor data and allows an age bit, that the processor selects whether the current sensor data or the previous sensor data are transmitted to him. The SPI data telegrams are therefore not only transmitted from the interface module to the processor, but vice versa.
  • the SPI (Serial Peripheral Interface) transmission is the data transmission between a master, a processor, and multiple slaves, these are the individual components in a control unit such as the interface module according to the invention or a Zündnikan Griffinung used for monitoring and ignition of the ignition means for the retaining means becomes.
  • 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, a clock line marked Clk is present.
  • the MOSI (master-out-slave-in) line is present, for the data transmission from a slave to the master, however, the MISO (master-in-slave-out) line is present .
  • the CS (Chip Select) line is used.
  • an enable line here marked EN, is used. The SPI line goes out from the master and then branches to the individual slaves, but the SPI line always has the five individual lines.
  • FIG. 1 a block diagram of the device according to the invention is shown.
  • a sensor 1 for example an acceleration sensor, as a peripheral sensor is connected to a first data input via a data output 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 4.
  • the interface module 3 is connected to a processor 5 via a first data input / output.
  • an SPI line 6 is used here.
  • the SPI line 6 branches from the processor 5 also to a Zünd Vietnamesemaschineung 51.
  • the processor 5, the interface module 3, the SPI line 6, the Zündnikan Kunststoffung 51 and the memory 4 are elements of a control unit 7.
  • the control unit 7 is here for Control of restraint systems used. However, other applications are conceivable.
  • the interface module 3 has means for data transmission and means for signal processing in order to perform the task of reformatting. For a synchronization, a flow control and the memory 4 are available. Furthermore, the interface module 3 has a power source to supply the vehicle sensors 1 and 2 with electrical energy.
  • the connection to the sensors 1 and 2 can also be realized via a bus, wherein in addition to the sensors 1 and 2 and other sensors to the interface module 3 can be connected.
  • the sensors 1 and 2 transmit their sensor data asynchronously in data telegrams to the interface module 3, which extracts the user data from these data telegrams and reformatted into SPI data telegrams, which are then transmitted via the SPI line 6 to the processor 5.
  • Sensors 1 and 2 immediately begin their asynchronous data transfer as soon as they are powered up.
  • the power supply is here via the lines of the interface module 3 to the sensors 1 and 2 instead.
  • a direct current is used, on which then modulate the sensors of their data.
  • a Manchester encoding is used in which is switched between two current levels back and forth.
  • the interface module 3 temporarily stores the received sensor data of a data telegram in the memory 4, so that the current sensor data of a sensor and the preceding sensor data are present in the memory 4 in the interface module 3 for the processor 5.
  • the processor 5 can access the sensor data which the sensor had still generated before its failure in the event of a loss of the sensor.
  • FIG. 2 is shown as a flow chart of the flow of the device according to the invention.
  • sensors 1 and 2 asynchronously send their sensor data to interface module 3 in first data telegrams after they have been supplied with electrical energy via the line via which the data telegrams are sent. There is therefore a powerline data transmission.
  • the interface module 3 recognizes the individual data telegrams on the basis of the counting of the edges of the pulses. It is possible here that the interface module 3 is informed by further signals of which sensors send data telegrams.
  • the interface module 3 stores the sensor data in the memory 4, wherein it stores the current sensor value for each sensor 1 and 2 stores previous sensor value.
  • the data is reformatted by the interface module 3, in that the interface module 3 transfers the sensor data into the data fields of SPI frames and optionally fills up empty spaces in the SPI data field with zeros.
  • the zeroes are recognized by the processor 5 as empty information.
  • the transmission takes place in an SPI data telegram.
  • the processing of the sensor data thus transmitted is carried out by the processor 5, for example, whether the restraint systems are to be activated or not.
  • the processor 5 calculates here the triggering algorithm for the connected restraint systems. If the sensor data indicate a crash, then, according to the crash severity, which can likewise be derived from the sensor data, an activation of the restraint systems takes place.
  • FIG. 3 is a data frame is transmitted from the sensor 1 or sensor 2 to the interface module 3, shown.
  • the data frame consists of 13 bits and is subdivided in the following way: first two start bits marked S1 and S2 are provided, to the 10 data bits follow, which include the acceleration data.
  • the data bits are numbered D0 to D9.
  • the conclusion of the data frame is formed by a parity bit for checking the plausibility of the data transmitted in the data telegram.
  • a bit duration is here for example provided with 8 microseconds, while the time t tran is specified as 88 microseconds and the total time of the data telegram t pas is specified as 28 microseconds.
  • a Manchester encoding is performed, with each bit duration divided into two equal 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 is transmitted by firstly the current being low and then high. This scheme guarantees that each bit duration has a transition in its middle, which makes the synchronization for the receiver, ie the interface module 3 simple.
  • the current modulation achieves better immunity to EMC (Electromagnetic Compatibility).
  • FIG. 4 It is shown how the seven data bits of a data telegram of a sensor, here the sensor 2 are transmitted in 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 of the sensors each have fewer or at most as many data bits as the SPI data telegrams have.
  • FIG. 5 such a data telegram of an SPI data frame is shown. It starts with a start bit SI followed by a synchronization bit 15 set with a 1. Bits 14 and 13 form the channel address while bit 12 is the age bit. Here the age bit is set to 0, meaning the sensor is the newest Sensor value from the interface module 3 requests. Bits 11 and 10 are further formatting data, which is then followed by the 10 data bits comprising the actual sensor data.

Claims (6)

  1. Dispositif de transmission de données entre des capteurs de véhicule et un contrôleur (7), la transmission de données s'effectuant de manière asynchrone avec un premier télégramme de données depuis un capteur de véhicule correspondant vers le contrôleur, le contrôleur (7) présentant un composant d'interface (3) qui décode le premier télégramme de données avec les données de capteur en provenance du capteur de véhicule (1, 2) correspondant et le reformatant en un deuxième télégramme de données et le composant d'interface (3) transmettant le deuxième télégramme de données de manière synchrone avec le processeur (5) du contrôleur (7), le composant d'interface (3) présentant une mémoire (4) pour la mémorisation temporaire des données de capteur, caractérisé en ce que le deuxième télégramme de données présente un bit d'âge pour sélectionner les données de capteur du capteur de véhicule (1, 2) correspondant, la mémoire (4) présentant un premier champ de données pour les anciennes données de capteur et un deuxième champ de données pour les nouvelles données de capteur pour chaque capteur de véhicule (1, 2), et le processeur (5) définit le bit d'âge.
  2. Dispositif selon la revendication 1, caractérisé en ce que le composant d'interface (3) représente à chaque fois les données de capteur dans un champ de données du deuxième télégramme de données, le composant d'interface (3) complétant les données manquantes.
  3. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le composant d'interface (3) reçoit le premier télégramme de données de la part du capteur de véhicule correspondant dans une trame de données de 13 bits et en ce que le composant d'interface (3) compte les fronts des télégrammes de données afin de reconnaître les télégrammes de données.
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le composant d'interface (3) alimente les capteurs de véhicule (1, 2) en énergie électrique.
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le premier capteur de véhicule (1, 2) correspondant génère le premier télégramme de données par une modulation de courant.
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le capteur de véhicule (1, 2) correspondant utilise un codage de Manchester pour le premier télégramme de données.
EP02704577.2A 2001-03-09 2002-01-11 Dispositif de transmission de donnees entre des capteurs de vitesse de vehicule et un processeur d'un appareil de commande Expired - Lifetime EP1371045B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10111265A DE10111265B4 (de) 2001-03-09 2001-03-09 Vorrichtung zur Datenübertragung zwischen Fahrzeugsensoren und einem Prozessor eines Steuergeräts
DE10111265 2001-03-09
PCT/DE2002/000069 WO2002073568A1 (fr) 2001-03-09 2002-01-11 Dispositif de transmission de donnees entre des capteurs de vitesse de vehicule et un processeur d'un appareil de commande

Publications (2)

Publication Number Publication Date
EP1371045A1 EP1371045A1 (fr) 2003-12-17
EP1371045B1 true EP1371045B1 (fr) 2013-09-25

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EP02704577.2A Expired - Lifetime EP1371045B1 (fr) 2001-03-09 2002-01-11 Dispositif de transmission de donnees entre des capteurs de vitesse de vehicule et un processeur d'un appareil de commande

Country Status (5)

Country Link
US (1) US6665593B2 (fr)
EP (1) EP1371045B1 (fr)
JP (1) JP4065783B2 (fr)
DE (1) DE10111265B4 (fr)
WO (1) WO2002073568A1 (fr)

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WO2020120071A1 (fr) 2018-12-13 2020-06-18 Valeo Schalter Und Sensoren Gmbh Système de communication de réseau présentant une modulation de courant bidirectionnelle aux fins de la transmission de données

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US7191269B2 (en) * 2003-07-30 2007-03-13 Delphi Technologies, Inc. Method for multiple sensors to communicate on a uni-directional bus
DE10358974A1 (de) * 2003-12-16 2005-07-28 Infineon Technologies Ag SPI-Baustein und Verfahren zum Auslesen von Daten aus einem SPI-Baustein
DE102004044467A1 (de) * 2004-09-15 2006-03-30 Robert Bosch Gmbh Verfahren zum Verarbeiten von Sensordaten
DE102004044466A1 (de) * 2004-09-15 2006-03-30 Robert Bosch Gmbh Verfahren zum Verarbeiten von Sensordaten
DE102005031344A1 (de) * 2005-07-05 2007-01-11 Robert Bosch Gmbh Steuergerät
DE102005036050B4 (de) 2005-08-01 2019-03-07 Robert Bosch Gmbh Steuergerät zur Ansteuerung von Personenschutzmitteln
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 (fr) * 2005-10-14 2007-04-26 Carrier Web Llc Systeme et procede pour la gestion en temps reel de ressources mobiles
DE102006018975A1 (de) * 2006-01-19 2007-08-02 Conti Temic Microelectronic Gmbh Verfahren und Anordnung zum Betrieb einer steuerbaren Fahrzeugeinrichtung
US7348915B2 (en) * 2006-07-19 2008-03-25 Quickfilter Technologies, Inc. Programmable digital filter system
DE102006037731A1 (de) * 2006-08-11 2008-02-14 Röder, Roland Überwachungssystem
DE102007024737A1 (de) * 2007-05-25 2008-11-27 Robert Bosch Gmbh Datenübertragungsverfahren zwischen Master- und Slave-Einrichtungen
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
US8360904B2 (en) 2007-08-17 2013-01-29 Adidas International Marketing Bv Sports electronic training system with sport ball, and applications thereof
DE102008044776B4 (de) 2008-08-28 2022-01-05 Bayerische Motoren Werke Aktiengesellschaft Elektrisches Kombiinstrument in einem Kraftfahrzeug
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Publication number Priority date Publication date Assignee Title
WO2020120071A1 (fr) 2018-12-13 2020-06-18 Valeo Schalter Und Sensoren Gmbh Système de communication de réseau présentant une modulation de courant bidirectionnelle aux fins de la transmission de données
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US11722334B2 (en) 2018-12-13 2023-08-08 Valeo Schalter Und Sensoren Gmbh Network communication system with bidirectional current modulation for transmitting data

Also Published As

Publication number Publication date
EP1371045A1 (fr) 2003-12-17
US20030171853A1 (en) 2003-09-11
JP2004519058A (ja) 2004-06-24
WO2002073568A1 (fr) 2002-09-19
US6665593B2 (en) 2003-12-16
DE10111265A1 (de) 2002-09-12
JP4065783B2 (ja) 2008-03-26
DE10111265B4 (de) 2005-12-01

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