METHOD OF IDENTIFYING POSITIONS OF WHEEL MODULES

• US 20100274441A1
• Filed: 11/30/2007
• Published: 10/28/2010
• Est. Priority Date: 11/30/2007
• Status: Abandoned Application

• Current Assignee: Volvo Lastvagnar AB (Volvo AB)
• Original Assignee: Volvo Lastvagnar AB (Volvo AB)
• Inventors: Carresjo, Erik
• Application Number:
  US12/744,731
• Publication Number:
  US 20100274441A1
• Time in Patent Office: Days
• US Class Current: 701/33
• CPC Class Codes: B60C 23/0416 allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
• CPC Class Codes: B60C 23/0479 Communicating with external units being not part of the vehicle, e.g. tools for diagnostic, mobile phones, electronic keys or service stations
• CPC Class Codes: B60C 23/0483 Wireless routers between wheel mounted transmitters and chassis mounted receivers
• CPC Class Codes: B60C 23/0488 Movement sensor, e.g. for sensing angular speed, acceleration or centripetal force
• CPC Class Codes: G01M 1/28 with special adaptations for determining imbalance of the body in situ, e.g. of vehicle wheels
• CPC Class Codes: G01M 17/013 Wheels

Abstract

There is provided a method of identifying locations of one or more modules of an apparatus implemented in a vehicle for monitoring operation of at least one wheel of the vehicle, the one or more modules operatively mounted to revolve with the at least one wheel, the one or more modules being operatively coupled in communication with a processing arrangement of the vehicle, the one or more modules being operable to sense at least one physical parameter of the wheel and to generate at least one corresponding sensor signal for the processing arrangement, the processing arrangement being operable to process the at least one sensor signal to compute information indicative of operation of the at least one wheel. The method includes steps of:

• (a) driving the vehicle for a period of time whilst recording a number of rotations executed for each of at least one wheel of the vehicle by employing a rotation sensing arrangement associated with the at least one wheel;
• (b) during the period of time, sensing at the one or more modules components of acceleration at the at least one wheel and communicating signals including signal components representative of the components of acceleration to the processing arrangement and deriving therefrom a measure of a number of rotations the at least one wheel has undergone in the period of time; and
• (c) for each of the one or more modules, matching the number of rotations recorded in step (b) with the measure of the number of rotation undergone by the at least one wheel as determined in step (b) and thereby associating identification codes of the one or more modules with corresponding at least one wheel of the vehicle.

Claims

1. A method of identifying locations of one or more modules (400) of an apparatus (1) implemented in a vehicle (900) for monitoring operation of at least one wheel (10) of the vehicle (900), said one or more modules (400) operatively mounted to revolve with said at least one wheel (10), said one or more modules (400) being operatively coupled in communication with a processing arrangement (710, ECU 950) of said vehicle (900), said one or more modules (400) being operable to sense at least one physical parameter of said wheel (10) and to generate at least one corresponding sensor signal for said processing arrangement (950), said processing arrangement (710, ECU 950) being operable to process said at least one sensor signal to compute information indicative of operation of said at least one wheel (10),

characterized in that

said method includes steps of:

(a) driving said vehicle (900) for a period of time whilst recording a number of rotations executed for each of at least one wheel (10) of said vehicle (900) by employing a rotation sensing arrangement (118) associated with said at least one wheel (10);

(b) during said period of time, sensing at said one or more modules (400) components of acceleration (A_x, A_y) at said at least one wheel (10) and communicating signals including signal components representative of said components of acceleration (A_x, A_y) to said processing arrangement (710, 950) and deriving therefrom a measure of a number of rotations said at least one wheel (10) has undergone in said period of time; and

(c) for each of said one or more modules (400), matching said number of rotations recorded in step (b) with said measure of said number of rotation undergone by said at least one wheel (10) as determined in step (b) and thereby associating identification codes (ID) of said one or more modules (400) with corresponding at least one wheel (10) of said vehicle (900).

2. A method of identifying locations of one or more modules (400) of an apparatus (680, 690, 2200) as claimed in claim 1 implemented in a vehicle (900) including a steering sensing arrangement for sensing a direction in which said vehicle (900) is being steered, said method including steps of:

(a) communicating with one or more modules (400) of said apparatus (680, 690, 2200) for receiving their identification codes (ID) at a processing arrangement (950) of said apparatus (680, 690, 2200), said one or more modules (400) being mounted on at least one wheel (10) of said vehicle (900);

(b) driving said vehicle (900) around a curved trajectory as sensed by said steering sensing arrangement and recording an angle of steering of said vehicle (900) together with a temporal record of pressures measured by said one or more modules (400) together with their corresponding identification codes (ID), said pressure pertaining to one or more tyres (30) of said at least one wheel (10); and

(c) applying an analysis to said steering angle and said temporal record in respect of time to identify where said one or more modules (400) are located on said at least one wheel (10) of said vehicle (900), said analysis utilizing a characteristic that tyres (30) on an outside of said curved trajectory will experience greater pressure increases than tyres (30) on an inside of said curved trajectory, and that tyres (30) towards a front region of said vehicle (900) experience an increase in pressure before tyres (30) towards a rear region of said vehicle (900) for a forward direction of travel of vehicle (900).

3. A method as claimed in claim 9, wherein after step (a), there is included an additional step of identifying those one or more modules (400) mounted to a wall (230) or onto an inside rim of a tyre (30) of said at least one wheel (10) by identifying periodic pulses (500) in acceleration signal components (A_y, A_z) derived from said one or more modules (400) corresponding to rotation of said at least one wheel (10).

4. A method as claimed in any one of claims 1 to 3, wherein said one or more modules (400) include at least one of:

(a) a pressure sensor (760) operable to sense a pressure (P) existing within a tyre (30) of said at least one wheel (10), said one or more modules (400) being operable to communicate a signal indicative of said pressure (P) to said processing arrangement (710, ECU 950) for use in computing said information indicative of operation of said at least one wheel (10);

(b) a strain gauge sensor (780) for measuring flexure of said tyre (30) of said at least one wheel (10), said module (400) being operable to communicate a signal indicative of said flexure to said processing arrangement (710, ECU 950) for use in computing said information indicative of operation of said at least one wheel (10);

(c) an accelerometer (770) for measuring acceleration (A_x, A_y, A_z) in at least one axis at a mounting location (L1, L2, L3, L4) of said one or more modules (400) on said at least one wheel (10), said one or more modules (400) being operable to communicate a signal indicative of said acceleration (A_x, A_y, A_z) to said processing arrangement (710, ECU 950) for use in computing said information indicative of operation of said at least one wheel (10); and

(d) a magnetic sensor (775) for measuring a magnetic field applied to said one or more modules (400), said one or more modules (400) being operable to communicate a signal indicative of said applied magnetic field to said processing arrangement (710, ECU 950) for use in controlling operation of said apparatus (600, 680, 690, 2200).

5. A method as claimed in any one of the preceding claims, wherein said one or more modules (400) are mounted at one or more locations (L1, L2, L3, L4) on said at least one wheel (10), said one or more locations including:

(a) on a hub (20) of said at least one wheel (10) substantially at an axis (B-B) of rotation of said at least one wheel (10);

(b) on a hub (20) of said at least one wheel (10) at a radial distance from said axis of rotation (B-B) of said at least one wheel (10);

(c) within a tyre (30) of said at least one wheel (10) for sensing a pressure (P) within said tyre (30), said at least one module (400) being mounted to a peripheral surface (90) of a hub (20) of said at least one wheel (10);

(d) within a tyre (30) of said wheel (10) for sensing a pressure (P) within said tyre (30), said one or more modules (400) being mounted to an inside side-wall surface (230) of said tyre (30) for measuring flexural characteristics of said side-wall (230); and

(e) on an inside surface of a peripheral rim of said at least one wheel (10) for measuring acceleration thereat.

6. A method as claimed in any one of the preceding claims, wherein said one or more modules (400) include at least one wireless interface (730) for communicating between said one or more modules (400) and said processing arrangement (ECU 950), said one or more modules (400) forming a wireless network.

7. A method as claimed in any one of the preceding claims, wherein said one or more modules (400) are each provided with a corresponding identification code (ID) for communicating to said processing arrangement (ECU 950) so that said processing arrangement (ECU 950) is able to recognize from which module (400) corresponding signal data has been sent.

8. A method as claimed in any one of the preceding claims, wherein said one or more modules (400) are radially distributed around said at least one wheel (10) for sensing operation of said at least one wheel (10) at a plurality of angular locations therearound.

9. A method as claimed in any one of the preceding claims including a step of presenting information to a driver of said vehicle (900) on a display (915) coupled in communication with said processing arrangement (ECU 950), said information indicating at least one of:

(a) an operating status of said one or more modules (400);

(b) a condition of said at least one wheel (10);

(c) one or more faults or potential faults associated with said at least one wheel (10);

(d) information regarding one or more actions to be taken by a driver (910) of said vehicle (900) in an event of one or more faults or potential faults associated with said at least one wheel (10) being identified; and

(e) an indication of whether or not at said at least one wheel (10) of said vehicle (900) has been modified.

10. A method as claimed in any one of the preceding claims, wherein said processing arrangement (ECU 950) is provided with a predetermined list of types of wheel (10) susceptible to being employed with said vehicle (900) and associated expected characteristics, and said one or more modules (400) are operable to communicate information to said processing arrangement (ECU 950) regarding an identification of a type of wheel (10) onto which the one or more modules (400) are mounted, and said processing arrangement (ECU 950) is operable to compare measured signals provided from said one or more modules (400) with signals that would be expected from said one or more modules (400) as simulated from said predetermined list, and wherein a disparity between said measured signals and said simulated signals is indicative of one or more faults or potential faults.

11. A method as claimed in any one of the preceding claims, wherein said one or more modules (400) include one or more processors (710) therein, and computation effort executed in operation for identifying one or more faults or potential faults in said at least one wheel (10) is shared between said one or more processors (710) and said processing arrangement (ECU 950).

12. A method as claimed in any one of the preceding claims, wherein said processing arrangement (ECU 950) is operable to send a message requesting said one or modules (400) to respond back to said processing arrangement (ECU 950) for declaring their identification codes (ID) to said processing arrangement (ECU 950) for enabling said processing arrangement to identify its configuration of one or more modules (400), and for identifying any changes in said configuration of one or more modules (400) occurring.

13. A method as claimed in claim 12, wherein said one or more modules (400) are operable to also respond with data indicative of expected characteristics of said at least one wheel (10) to which said one of more modules (400) are mounted.

14. A method as claimed as claimed in any one of the preceding claims, wherein said processing arrangement (ECU 950) is operable to compare rotation measurements from said sensor arrangement (118) for sensing said angular orientation (θ

) of said at least one wheel (10) against signals supplied from said one or more corresponding modules (400) for checking functional operation of said sensor arrangement (118) and/or said one or more modules (400).

15. A method as claimed in claim 14, wherein said sensor arrangement (118) is an ABS wheel angular orientation sensor associated with brakes of said vehicle (900).

16. A wheel-monitoring apparatus (1) operable to execute a method as claimed in any one of the preceding claims.

17. A module (400) operable to function in a vehicle (900) for implementing a method as claimed in any one of claims 1 to 16.

18. A vehicle (900) including a wheel-monitoring apparatus (1) as claimed in claim 16 operable to monitor operation of at least one wheel (10) of said vehicle (900) pursuant to a method as claimed in any one of claims 1 to 15.

19. A wheel (10) including one or more modules (400) mounted thereonto, said one or more modules (400) operable to function with a wheel-monitoring apparatus (1) as claimed in claim 16 operable to monitor operation of at least one wheel (10) of said vehicle (900) pursuant to a method as claimed in any one of claims 1 to 16.

20. A tyre (30) including a module (400) as claimed in claim 17.

21. A tyre (30) as claimed in claim 20, wherein said module (400) is mounted to a side wall (230) of said tyre (30).

22. A system including one or more vehicles (900), wherein each vehicle (900) includes a wheel-monitoring apparatus (1) operable to execute a method as claimed in any one of claims 1 to 16, said system comprising:

(a) a control centre (1000) for coordinating repair or maintenance of said one or more vehicles (900);

(b) one or more service facilities (1010) operable to perform repair or replacement on said one or more vehicles (900);

wherein said system is operable to;

(c) enable each wheel-monitoring apparatus (1) to monitor operation of its one or more associated wheels (10) and detect when a problem or potential problem arises therewith;

(d) enable each wheel-monitoring apparatus (1) to communicate said problem or potential problem to said control centre (1000), for said control centre (1000) to identify one or more service facilities (1010) capable of addressing said problem or potential problem; and

(e) enable said control centre (1000) to communicate instructions to said one or more vehicles (900) whose wheel-monitoring apparatus (1) has detected a problem or potential problem to said identified one or more service facilities (1010) for said problem or potential problem to be addressed.

23. A system as claimed in claim 22, wherein said system in (e) is operable to inform said identified one or more service facilities (1010) in advance of arrival of said one or more vehicles (900) for maintenance or repair, so that said identified one or more service facilities (1010) are provided with an opportunity to make preparation for arrival of said one or more vehicle (900) for maintenance or repair.

24. A system as claimed in claim 22 or 23, wherein said control centre (1000) is operable to organise said maintenance or repair at said identified one or more service facilities (1010) automatically without one or more drivers (910) of said one or more vehicles (900) needing to intervene.

25. A system as claimed in claim 22, 23 or 246, wherein said one or more vehicles (900) include global position sensing apparatus (1020) thereon coupled in communication with said wheel-monitoring apparatus (1) for enabling said one or more vehicles (900) to communicate their position to said control centre (1000), so that said control centre (1000) is operable to identify one or more service facilities (1010) most suitably geographically disposed to service said one or more vehicles (900).

26. A method of operating a system including one or more vehicles (900), wherein each vehicle (900) includes a wheel-monitoring apparatus (1) operable to implement a method as claimed in any one of claims 1 to 15, said system comprising:

(a) a control centre (1000) for coordinating repair or maintenance of said one or more vehicles (900);

(b) one or more service facilities (1010) operable to perform repair or replacement on said one or more vehicles (900);

wherein said method includes steps of;

(c) enabling each wheel-monitoring apparatus (1) to monitor operation of its one or more associated wheels (10) and to detect when a problem or potential problem arises therewith;

(d) enabling each wheel-monitoring apparatus (1) to communicate said problem or potential problem to said control centre (1000), for said control centre (1000) to identify one or more service facilities (1010) capable of addressing said problem or potential problem; and

(e) enabling said control centre (1000) to communicate instructions to said one or more vehicles (900) whose wheel-monitoring apparatus (1) has detected a problem or potential problem to said identified one or more service facilities (1010) for said problem or potential problem to be addressed.

27. A software product recorded on a data carrier, said product being executable on computing hardware for executing a method as claimed in any one of claims 1 to 15.