Protected transmission of independent sensor signals

• US 9,953,521 B2
• Filed: 02/20/2017
• Issued: 04/24/2018
• Est. Priority Date: 08/19/2014
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Hammerschmidt, Dirk
• Primary Examiner(s): Casillashernandez, Omar
• Application Number:
  US15/437,152
• Publication Number:
  US 20170162040A1
• Time in Patent Office: 428 Days
• Field of Search: 34087001-87044
• CPC Class Codes: G08C 15/00 Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
• CPC Class Codes: G08C 2200/00 Transmission systems for measured values, control or similar signals
• CPC Class Codes: G08C 25/00 Arrangements for preventing or correcting errors; Monitoring arrangements
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

The present disclosure relates to a communication system configured to independently introduce channel protection data into a plurality of different channels prior to transmission. In some embodiments, the system has a plurality of sensors configured to independently generate digital sensor signals, each sensor signal corresponding to a sensed quantity. A plurality of channel protection elements are respectively configured to receive one of the digital sensor signals output from an individual one of the sensors and to introduce channel protection data (CPD) into the received digital sensor signal to generate an individual channel protected sensor signal (CPS). A shared communication interface is configured to receive the individual CPS signals from the plurality of channel protection elements and to assemble selected ones of the individual CPS signals into a data frame.

Claims

1. A sensor system, comprising:

a plurality of sensors configured to independently generate digital sensor signals, each sensor signal corresponding to a sensed quantity;

a plurality of channel protection elements, respectively configured to receive one of the digital sensor signals output from an individual one of the sensors and to introduce channel protection data (CPD) into the received digital sensor signal to generate an individual channel protected sensor signal (CPS);

a shared communication interface configured to receive the individual CPS signals from the plurality of channel protection elements and to assemble selected ones of the individual CPS signals into a data frame; and

wherein the plurality of sensors, the plurality of channel protection elements, and the shared communication interface are disposed onto a same integrated chip.

2. The sensor system of claim 1, wherein the shared communication interface is configured to transmit the data frame according to a selected communication protocol.

3. The sensor system of claim 1, wherein the data frame is configured to collectively transmit all the individual CPS signals according to a selected communication protocol.

4. The sensor system of claim 1,

wherein the shared communication interface comprises a protocol generation element configured to receive the individual CPS signals from the plurality of channel protection elements and to define one or more communication protocols by which the individual CPS signals are to be transmitted on a shared physical communication layer;

wherein the protocol generation element and the plurality of channel protection elements are separate and distinct elements; and

wherein the shared physical communication layer comprises a physical driver configured to physically generate a transmit signal having one or more protocol encoded CPS signals, which are encoded according to the one or more communication protocols.

5. The sensor system of claim 1, wherein the shared communication interface is further configured to transmit the data frame over a shared physical communication layer, the shared physical communication layer including at least a line driver.

6. The sensor system of claim 5, wherein the shared physical communication layer comprises a wire extending between the sensor system comprising the plurality of sensors and a receiver unit couplable to the sensor system using the wire.

7. The sensor system of claim 1, further comprising:

an electronic control unit configured to receive the data frame from the shared communication interface;

a message decoding element configured to recover the individual CPS signals from the data frame received by the electronic control unit; and

a message integrity element configured to detect faults in one or more of the individual CPS signals recovered by the message decoding element.

8. The sensor system of claim 7, wherein the message integrity element is configured to detect faults generated during either or both of communication protocol generation and transmission of the individual CPS signals.

9. The sensor system of claim 1, wherein the plurality of channel protection elements respectively comprise:

an ID appending block configured to append an identification code to the received sensor signal, wherein the identification code identifies a sensor out of the plurality of sensors that generated the received sensor signal;

a message counter block configured to append timing information or a message count to the received sensor signal; and

a redundancy block configured to append a redundancy code to the received sensor signal.

10. The sensor system of claim 1, wherein the sensed quantity comprises a steering angle.

11. An electronic control unit (ECU), comprising:

a message decoding element couplable to a sensor system by a shared physical communication layer configured to convey a data frame between the sensor system and the ECU according to one or more communication protocols, wherein the sensor system comprises;

a plurality of sensors configured to independently generate sensor signals, each sensor signal corresponding to a same physical quantity;

a plurality of channel protection elements, respectively configured to receive one of the sensor signals output from an individual one of the plurality of sensors and to introduce channel protection data into the received sensor signal to generate an individual channel protected sensor (CPS) signal; and

a shared communication interface configured to receive the individual CPS signals from the plurality of channel protection elements and to assemble selected ones of the individual CPS signals into the data frame; and

wherein the message decoding element is configured to receive the data frame from the shared physical communication layer and to recover the individual CPS signals from the data frame; and

a message integrity element configured to receive the recovered individual CPS signals from the message decoding element and to detect faults in one or more of the individual CPS signals recovered from the data frame.

12. The electronic control unit of claim 11, wherein the data frame is configured to collectively transmit all the individual CPS signals from the sensor system according to a selected communication protocol.

13. The electronic control unit of claim 11, wherein the shared physical communication layer comprises a physical driver configured to physically generate a transmitted signal having one or more protocol encoded CPS signals, which are encoded according to the one or more communication protocols.

14. The electronic control unit of claim 11, wherein the shared physical communication layer is a separate and distinct structure from the electronic control unit.

15. The electronic control unit of claim 11, wherein the ECU is configured to use the channel protection data from the individual CPS signals to determine if faults have occurred downstream of the plurality of channel protection elements.

16. The electronic control unit of claim 11, wherein the message decoding element is configured recover the individual CPS signals by decoding the one or more communication protocols of the data frame using an inverse operation of the shared communication interface.

17. A method, comprising:

independently generating a plurality of digital sensor signals;

separately introducing channel protection data into the plurality of digital sensor signals to generate a plurality of channel protected sensor (CPS) signals;

providing the plurality of CPS signals to a shared communication interface configured to—

operating the shared communication interface to assemble selected ones of the plurality of CPS signals into a data frame;

transmitting the data frame to a receiver according to one or more communication protocols; and

wherein the plurality of digital sensor signals are generated by a plurality of separate sensors disposed onto a same integrated chip.

18. The method of claim 17, further comprising:

collectively transmitting all of the plurality of CPS signals in the data frame according to a selected communication protocol.