Method for detecting the detachment of a sensor device mounted in a wheel of a vehicle

• US 9,773,359 B2
• Filed: 12/04/2015
• Issued: 09/26/2017
• Est. Priority Date: 12/08/2014
• Status: Active Grant

• Current Assignee: Continental Automotive France (Continental AG), Continental Automotive GmbH (Continental AG)
• Original Assignee: Continental Automotive France (Continental AG), Continental Automotive GmbH (Continental AG)
• Inventors: Cimponeriu, Andrei, Fudelea, Olivier
• Primary Examiner(s): Marc, McDieunel
• Application Number:
  US14/959,688
• Publication Number:
  US 20160163134A1
• Time in Patent Office: 662 Days
• Field of Search: 701 297
• CPC Class Codes: B60C 23/0481 System diagnostic, e.g. monitoring battery voltage, detecting hardware detachments or identifying wireless transmission failures
• CPC Class Codes: B60C 23/0488 Movement sensor, e.g. for sensing angular speed, acceleration or centripetal force
• CPC Class Codes: G01P 3/00 Measuring linear or angular speed; Measuring differences of linear or angular speeds G01P5/00 - G01P11/00 take precedence; direction and speed indication G01P13/045; counting mechanisms G06M
• CPC Class Codes: G07C 5/02 Registering or indicating driving, working, idle, or waiting time only apparatus forming part of taximeters G07B13/00
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005

Abstract

A method for detecting the detachment of a sensor device mounted in a wheel of a motor vehicle at an assembly distance from the center of the wheel. The method includes steps for acquiring (E1) the angular-speed value of the wheel, measuring (E2) the acceleration value of the sensor device, calculating (E3) the distance separating the sensor device from the center of the wheel using the angular-speed value and the acceleration value, and determining (E4) the detachment of the sensor device if the calculated distance is different from the assembly distance of the sensor device in the wheel.

Claims

1. A method for detecting the detachment of a sensor device (9A, 9B, 9C, 9D) mounted on a wheel (3A, 3B, 3C, 3D) of a motor vehicle (1) at an assembly distance (D1, D1′

) from the center (C) of said wheel (3A, 3B, 3C, 3D), said method comprising the following steps;

acquiring (E1) an angular-speed value (ω

1, ω

2, ω

3, ω

4) of the wheel (3A, 3B, 3C, 3D),

measuring (E2) by a unit (17A, 17B, 17C, 17D) an acceleration value (a1, a2, a3, a4) of said sensor device (9A, 9B, 9C, 9D),

calculating (E3) by a unit (5A) a distance (D) separating the sensor device from the center (C) of the wheel (3A, 3B, 3C, 3D) using said angular-speed value (ω

1, ω

2, ω

3, ω

4) and said acceleration value (a1, a2, a3, a4),

determining (E4) by a unit (5B) the detachment of the sensor device (9A, 9B, 9C, 9D) when the calculated distance (D) is different from the assembly distance (D1, D1′

) of the sensor device (9A, 9B, 9C, 9D) in the wheel (3A, 3B, 3C, 3D),

wherein the acquisition step includes an estimation of the angular-speed value (ω

1, ω

2, ω

3, ω

4) of the wheel (3A, 3B, 3C, 3D) carried out using the speed of the vehicle (1), the steering angle (δ

) of same and the radius of curvature (ρ

) of same.

2. The method as claimed in claim 1, wherein the radius of curvature (ρ

) of the vehicle (1) is determined using a geolocation unit of said vehicle (1).

3. A device for detecting the detachment of a sensor device (9A, 9B, 9C, 9D) mounted on a wheel (3A, 3B, 3C, 3D) of a motor vehicle (1) at an assembly distance (D1, D1′

) from the center (C) of said wheel (3A, 3B, 3C, 3D), said detection device comprising;

a unit (7A, 7B, 7C, 7D) for acquiring the angular-speed value (ω

1, ω

2, ω

3, ω

4) of the wheel (3A, 3B, 3C, 3D),

a unit (17A, 17B, 17C, 17D) for measuring the acceleration value (a1, a2, a3, a4) of said sensor device (9A, 9B, 9C, 9D),

a unit (5A) for calculating the distance (D) separating the sensor device (9A, 9B, 9C, 9D) from the center (C) of the wheel (3A, 3B, 3C, 3D) using an angular-speed value (ω

1, ω

2, ω

3, ω

4) and an acceleration value (a1, a2, a3, a4),

unit (5B) for determining the detachment of the sensor device (9A, 9B, 9C, 9D) when the calculated distance (D) is different from the assembly distance (D1, D1′

) of the sensor device (9A, 9B, 9C, 9D) in the wheel.

4. The device as claimed in claim 3, wherein the unit for acquiring the angular-speed value (ω

1, ω

2, ω

3, ω

4) of said wheel (3A, 3B, 3C, 3D) includes one sensor (7A, 7B, 7C, 7D) of angular speed (ω

1, ω

2, ω

3, ω

4) per wheel (3A, 3B, 3C, 3D).

5. A vehicle (1) including a device for detecting the detachment of a sensor device (9A, 9B, 9C, 9D) as claimed in claim 3.

6. A vehicle (1) including a device for detecting the detachment of a sensor device (9A, 9B, 9C, 9D) as claimed in claim 4.