Method of driving a processor of an electronic box mounted on a wheel of a vehicle
View Patent ↗Disclosed is a method for driving a processor of an electronic box mounted on a vehicle wheel, transmitting operating parameters of the wheel for implementation of a specific application by a central unit. This includes defining, for each specific application, the physical quantities liable to affect the relevance of the operating parameters, and ranges of measured values corresponding to conditions for obtaining relevant values of the operating parameters. Also included is a procedure for acquiring and transmitting the operating parameters consisting of a succession of transmission windows, during each of which the physical quantities selected for the application are measured, it is checked whether the conditions for obtaining relevant values of the operating parameters are met. If so, at least one value of each parameter is acquired and transmitted, while assigning to this value a datum attesting to the relevance of the latter, and then the transmission window is closed.
1. A method for driving a processor ( 9 ) of an electronic box ( 5 ) mounted on a wheel ( 2 ), equipped with a tire ( 4 ), of a vehicle ( 1 ), and incorporating means ( 10 - 12 ) for measuring physical quantities, such as mechanical quantities, temperature, pressure, of said tire, and kinematic quantities representative of the dynamics of the vehicle ( 1 ), for the purpose of acquiring and transmitting, to a central unit ( 13 ), operating parameters of said wheel that are intended for the implementation of a specific application by said central unit, said driving method comprising:
defining, for each specific application, each physical quantity liable to affect the relevance of the operating parameters, and for said physical quantities, ranges of measured values corresponding to conditions for obtaining relevant values of said operating parameters,
defining a temporal window Ft, termed transmission window, tailored to permit, during a maximum time frame Ta, the obtaining of relevant values of the operating parameters,
and implementing a procedure for acquiring and transmitting the operating parameters consisting, until transmission of a predetermined number of operating parameters that is dependent on the application, of a succession of transmission windows Ft:
during each of which the physical quantities selected for the application are measured, and it is checked whether the conditions for obtaining relevant values of the operating parameters are met, and:
a. if so, at least one value of each operating parameter is acquired and transmitted, while assigning to this value a datum Qmax attesting to the relevance of the latter, and then the transmission window Ft is closed,
b. if not, and until expiry of the time frame Ta, the step of measuring and checking the selected physical quantities is repeated,
and at the end of each of which, in the absence of obtaining satisfactory conditions after expiry of the time frame Ta, at least one value of each operating parameter is acquired and transmitted, while assigning to this value a datum Qmin attesting to the lack of relevance of the latter, and then the transmission window Ft is closed.
2. The driving method as claimed in claim 1 , wherein the openings of two successive transmission windows Ft are controlled so as to be spaced apart by a predetermined time period Ts of duration greater than the time frame Ta.
3. The driving method as claimed in claim 2 , wherein, when an operating parameter value assigned a datum Qmin attesting to its lack of relevance is transmitted, data representative of the conditions for obtaining this operating parameter value are furthermore transmitted.
4. The driving method as claimed in claim 2 , wherein the physical quantities liable to affect the relevance of the operating parameters comprise quantities representative of the longitudinal dynamics and of the lateral dynamics of the wheel ( 2 ).
5. The driving method as claimed in claim 2 , wherein the physical quantities liable to affect the relevance of the operating parameters comprise a quantity representative of the signal-to-noise ratio of the signals delivered by the measuring means.
6. The driving method as claimed in claim 2 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired and transmitted.
7. The driving method as claimed in claim 2 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired, and a datum representative of the population of said values is calculated and transmitted.
8. The driving method as claimed in claim 1 , wherein, when an operating parameter value assigned a datum Qmin attesting to its lack of relevance is transmitted, data representative of the conditions for obtaining this operating parameter value are furthermore transmitted.
9. The driving method as claimed in claim 8 , wherein the physical quantities liable to affect the relevance of the operating parameters comprise quantities representative of the longitudinal dynamics and of the lateral dynamics of the wheel ( 2 ).
10. The driving method as claimed in claim 8 , wherein the physical quantities liable to affect the relevance of the operating parameters comprise a quantity representative of the signal-to-noise ratio of the signals delivered by the measuring means.
11. The driving method as claimed in claim 8 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired and transmitted.
12. The driving method as claimed in claim 8 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired, and a datum representative of the population of said values is calculated and transmitted.
13. The driving method as claimed in claim 1 , wherein the physical quantities liable to affect the relevance of the operating parameters comprise quantities representative of the longitudinal dynamics and of the lateral dynamics of the wheel ( 2 ).
14. The driving method as claimed in claim 13 , wherein the physical quantities liable to affect the relevance of the operating parameters comprise a quantity representative of the signal-to-noise ratio of the signals delivered by the measuring means.
15. The driving method as claimed in claim 13 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired and transmitted.
16. The driving method as claimed in claim 13 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired, and a datum representative of the population of said values is calculated and transmitted.
17. The driving method as claimed in claim 1 , wherein the physical quantities liable to affect the relevance of the operating parameters comprise a quantity representative of the signal-to-noise ratio of the signals delivered by the measuring means.
18. The driving method as claimed in claim 17 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired and transmitted.
19. The driving method as claimed in claim 1 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired and transmitted.
20. The driving method as claimed in claim 1 , wherein, during each transmission window Ft, a sequence of values of each operating parameter is acquired, and a datum representative of the population of said values is calculated and transmitted.