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1. (WO2018109443) CAPTEUR DE VÉHICULE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS:

1. A sensor unit for use in a vehicle sensor system comprising a controller and at least one further sensor unit, the sensor unit comprising:

a motion sensor configured to determine a first speed of the sensor unit; and a transmitter configured to transmit first identification data to the controller if the first speed of the sensor unit exceeds a first threshold,

wherein the motion sensor is further configured to determine a second speed of the sensor unit a period of time after determination of the first speed of the sensor unit, and wherein the transmitter is configured to transmit to the controller second identification data if the second speed of the sensor unit exceeds a second threshold.

2. A sensor unit according to claim 1 , wherein the motion sensor is configured to determine the second speed of the sensor unit if the transmitter has transmitted the first identification data.

3. A sensor unit according to claim 1 or claim 2, wherein the transmitter is configured to transmit each of the first and second identification data a plurality of times within first and second transmission periods respectively.

4. A sensor unit according to any preceding claim, further comprising a sleep controller configured to place the sensor unit in a low power mode if the first speed of the sensor unit does not exceed the first threshold within a first checking period and/or the second speed of the sensor unit does not exceed the second threshold within a second checking period.

5. A sensor unit according to claim 4, wherein the motion sensor is configured to determine the first and second speeds of the sensor unit a plurality of times within the first and second checking periods respectively, and further configured to stop determining the first and second speeds of the sensor unit after expiry of the corresponding checking period.

6. A sensor unit according to any preceding claim, wherein the motion sensor is configured to sense a change in rotational position of the sensor unit and to determine the first speed of the sensor unit if the sensed change in rotational position is above a threshold.

7. A sensor unit according to any preceding claim, wherein the first threshold and the second threshold have the same value.

8. A method for operation of a sensor unit for use in a vehicle sensor system comprising a controller and at least one further sensor unit, the method comprising: determining, by a motion sensor, a first speed of the sensor unit; and transmitting, by a transmitter, first identification data to the controller if the first speed of the sensor unit exceeds a first threshold;

determining, by the motion sensor, a second speed of the sensor unit a period of time after determination of the first speed of the sensor unit; and

transmitting, by the transmitter second identification data to the controller if the second speed of the sensor unit exceeds a second threshold.

9. A method according to claim 8, wherein the motion sensor determines the second speed of the sensor unit if the transmitter has transmitted the first identification data.

10. A method according to claim 8 or claim 9, wherein the transmitter transmits each of the first and second identification data a plurality of times within first and second transmission periods respectively.

1 1. A method according to any of claims 9 to 11 , further comprising a sleep controller placing the sensor unit in a low power mode if the first speed of the sensor unit does not exceed the first threshold within a first checking period and/or the second speed of the sensor unit does not exceed the second threshold within a second checking period.

12. A method according to claim 11 , wherein the motion sensor determines the first and second speeds of the sensor unit a plurality of times within the first and second checking periods respectively, and stops determining the first and second speeds of the sensor unit after expiry of the corresponding checking period.

13. A method according to any of claims 8 to 12, wherein the motion sensor senses a change in rotational position of the sensor unit and determines the first speed of the sensor unit if the sensed change in rotational position is above a threshold.

14. A method according to any preceding claim, wherein the first threshold and the second threshold have the same value.

15. A computer program comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the method according to any of claims 8 to 14.

16. A carrier containing the computer program according to claim 15, wherein the carrier is one of an electronic signal, optical signal, radio signal, or non-transitory computer readable storage medium.

17. A controller for use in a vehicle sensor system for assigning a plurality of sensor units to a vehicle, the controller comprising:

a receiver configured to receive first identification data from at least one of the plurality of sensor units, and further configured to receive second identification data from the at least one of the plurality of sensor units a period of time later; and

a sensor unit assigner configured to assign to the controller the at least one of the plurality of sensor units if the first identification data and the second identification data are received.

18. A controller according to claim 17, further comprising a memory configured to store data relating to a plurality of previously assigned sensor units,

and wherein the sensor unit assigner is configured to retrieve data from the memory to determine whether the at least one of the plurality of assigned sensors has previously been assigned to the controller and to store data relating to the at least one assigned sensors in the memory if it has not been previously assigned to the controller.

19. A controller according to claim 18, wherein the memory is configured to store data relating to a maximum number of the most recent sensor units assigned to the controller.

20. A controller according to claim 18 or 19, wherein the sensor unit assigner is configured to retrieve the data relating to the previously assigned sensor units from the memory at the beginning of a journey of the vehicle and to assign to the controller previously assigned sensor units corresponding to the retrieved data.

21. A controller according to any of claims 17 to 20, wherein the sensor unit assigner is configured to assign the at least one of the plurality of sensor units to the controller if the second identification data is received within a listening period beginning with receipt of the first identification data.

22. A method for operating a controller for use in a vehicle sensor system for assigning a plurality of sensor units to a vehicle, the method comprising:

receiving, by a receiver, first identification data from at least one of the plurality of sensor units;

receiving, by the receiver, second identification data from the at least one of the plurality of sensor units a period of time later; and

assigning, by a sensor unit assigner, to the controller the at least one of the plurality of sensor units if the first identification data and the second identification data are received.

23. A method according to claim 22, further comprising retrieving, by the sensor unit assigner, data relating to a plurality of previously assigned sensor units from a memory;

determining, by the sensor unit assigner, whether the at least one of the plurality of assigned sensors has previously been assigned to the controller; and

storing, by the sensor unit assigner, data relating to the at least one assigned sensor in the memory if it has not been previously assigned to the controller.

24. A method according to claim 23, wherein the memory stores data relating to a maximum number of the most recent sensor units assigned to the controller.

25. A method according to claim 23 or 24, further comprising the sensor unit assigner retrieving the data relating to the previously assigned sensor units from the memory at the beginning of a journey of the vehicle and assigning to the controller previously assigned sensor units corresponding to the retrieved data.

26. A method according to any of claims 22 to 25, further comprising the sensor unit assigner assigning the at least one of the plurality of sensor units to the controller if the second identification data is received within a listening period beginning with receipt of the first identification data.

27. A computer program comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the method according to any of claims 22 to 26.

28. A carrier containing the computer program according to claim 27, wherein the carrier is one of an electronic signal, optical signal, radio signal, or non-transitory computer readable storage medium.

29. A vehicle sensor system comprising:

a plurality of sensor units according to any of claims 1 to 7; and

a controller according to any of claims 17 to 21.

30. A vehicle comprising the vehicle sensor system of claim 29.