Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L12/40—Bus networks
  • H04L12/403—Bus networks with centralised control, e.g. polling
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L12/40—Bus networks
  • H04L12/4013—Management of data rate on the bus
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L67/00—Network arrangements or protocols for supporting network services or applications
  • H04L67/01—Protocols
  • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L12/40—Bus networks
  • H04L2012/40267—Bus for use in transportation systems
  • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle

Definitions

• the invention relates to a method for operating a sensor arrangement in a motor vehicle based on a DSI protocol, the sensor arrangement being a
• PDCM mode data transmission follows a fixed scheme specified by the master.
• a fixed time slot is assigned to each slave, that is to say a time period, relative to a synchronization signal sent by the master, in which data is to be transmitted from the respective slave to the master.
• ASIL C required failure probability less than 10 7 / hour
• ASIL B Driver's request not accelerated, e.g. only ASIL B, while ASIL D generally applies to systems for fully autonomous driving.
• the system comprises a plurality of ultrasonic sensors and at least one digital sensor interface.
• Control unit to be transmitted to the ultrasonic sensor in a voltage-modulated manner.
• this data bus and a LIN data bus for data transmission can be combined to take advantage of the two bus systems.
• EP 2 263 102 B1 describes an ultrasound-based one
• the Driver assistance system with several sensors.
• the sensors are each assigned an individual identification code, which is transmitted by an interface
• Specify sensor arrangement in a motor vehicle in which communication between the master and the slaves is regularly possible with a high user data rate while ensuring a predetermined ASIL level.
• the sensor arrangement has a central unit as master and a plurality of sensor units as slaves controlled by the master,
• the central unit and the sensor units are connected to a bus line and
• a second message from the central unit to a second sensor without waiting for a response message from the first sensor to be received by the central unit. If it is said in the present case that it is a method based on a DSI protocol, this means that the method uses the DSI protocol, but not that the method must fully comply with the DSI3 standard. Rather, the process can go beyond or expand the standard.
• a configurable mode for the DSI3 standard is provided, with which messages can be sent to the various sensors very effectively, namely in a short time. This mode can be set for certain situations and then switch back to a conventional mode.
• the sending of the second message is started immediately after the sending of the first message has been completed.
• the second message is sent regardless of the receipt of such a reply message immediately after the first message is sent.
• the first sensor detects the reception of the first
• an embodiment is advantageous in which the transmission of the further message is started immediately after the transmission of the message previously sent is completed. It is also preferred that the sensor, to which a message has been sent directly beforehand, does not send a response message to the message received by it. According to a preferred development of the invention, this method is continued for further sensors. The method is therefore preferably designed such that the method step of sending a further message from the central unit to a further sensor without the central unit receiving a
• the messages sent from the central unit to the sensors can be any information sent from the central unit to the sensors.
• the invention also relates to a non-volatile, computer-readable
• Storage medium with instructions stored thereon which, when executed on a processor, bring about a method as described above.
• the invention also relates to a sensor arrangement which can be operated by means of a
• Sensor arrangement as sensor units on ultrasonic sensor units for transmitting and / or receiving ultrasonic signals.
• the master e.g. by a
• Fig. 1 schematically a vehicle with a sensor arrangement according to a preferred embodiment of the invention with a central unit as a master and three sensor units as slaves in a "daisy chain" configuration and
• the central unit 3 represents a master in the sense of the above-mentioned DSI3 specification, which is connected via the bus line 4 to the three sensor units S1, S2, S3 functioning as slaves in the sense of the DSI3 specification, so that overall a bus in the sense of DSI3 specification is available. Furthermore, it concerns the
• Sensor units S1, S2, S3 to ultrasonic sensor units for transmitting and / or receiving ultrasonic signals, which ultrasonic sensor units one
• Sending messages differs significantly from the CRM mode as described above. For this, reference is made to FIGS. 2a and b.
• FIG. 2a shows the communication between the central unit 3 and the sensor units S1, S2, S3 according to a conventional CRM mode.
• the chronological sequence of how the central unit 3 sends CRM messages CRM1, CRM2 and CRM3 to the sensor units S1, S2, S3 is shown, with a break between each of the CRM messages CRM1, CRM2, CRM3.
• responses R1, R2, R3 are sent back to the central unit by a respective sensor unit S1, S2, S3.
• These answers R1, R2, R3 can e.g. Confirmations that one of the
• S3 are actually only ever intended for a single sensor S1, S2, S3.
• Sensor arrangement 2 can be achieved. Because no response messages have to be generated by the sensors S1, S2, S3, the power consumption is also reduced, so that overall an efficient possibility is created, in cases, in who can dispense with a response from sensors S1, S2, S3 to ensure that these sensors S1, S2, S3 are addressed quickly.

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Quality & Reliability (AREA)
• Health & Medical Sciences (AREA)
• Computing Systems (AREA)
• General Health & Medical Sciences (AREA)
• Medical Informatics (AREA)
• Small-Scale Networks (AREA)
• Arrangements For Transmission Of Measured Signals (AREA)
• Selective Calling Equipment (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=66752060

Family Applications (1)

Country Status (7)

Family Cites Families (29)

• 2018
  • 2018-06-14 DE DE102018114225.0A patent/DE102018114225A1/de active Pending
• 2019
  • 2019-05-27 JP JP2020569115A patent/JP7112527B2/ja active Active
  • 2019-05-27 CN CN201980047272.8A patent/CN112514331B/zh active Active
  • 2019-05-27 US US16/973,865 patent/US11424954B2/en active Active
  • 2019-05-27 EP EP19728348.4A patent/EP3808038A1/de active Pending
  • 2019-05-27 KR KR1020217001098A patent/KR102549091B1/ko active IP Right Grant
  • 2019-05-27 WO PCT/EP2019/063563 patent/WO2019238395A1/de active Application Filing

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