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

Patent metadata

Field	Value
Publication number	US-9773359-B2
Application number	US-201514959688-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 8, 2014
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

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 (E 1 ) the angular-speed value of the wheel, measuring (E 2 ) the acceleration value of the sensor device, calculating (E 3 ) the distance separating the sensor device from the center of the wheel using the angular-speed value and the acceleration value, and determining (E 4 ) the detachment of the sensor device if the calculated distance is different from the assembly distance of the sensor device in the wheel.

First claim

The invention claimed is:

1. A method for detecting the detachment of a sensor device ( 9 A, 9 B, 9 C, 9 D) mounted on a wheel ( 3 A, 3 B, 3 C, 3 D) of a motor vehicle ( 1 ) at an assembly distance (D 1 , D 1 ′) from the center (C) of said wheel ( 3 A, 3 B, 3 C, 3 D), said method comprising the following steps:
acquiring (E 1 ) an angular-speed value (ω 1 , ω 2 , ω 3 , ω 4 ) of the wheel ( 3 A, 3 B, 3 C, 3 D),
measuring (E 2 ) by a unit ( 17 A, 17 B, 17 C, 17 D) an acceleration value (a 1 , a 2 , a 3 , a 4 ) of said sensor device ( 9 A, 9 B, 9 C, 9 D),
calculating (E 3 ) by a unit ( 5 A) a distance (D) separating the sensor device from the center (C) of the wheel ( 3 A, 3 B, 3 C, 3 D) using said angular-speed value (ω 1 , ω 2 , ω 3 , ω 4 ) and said acceleration value (a 1 , a 2 , a 3 , a 4 ),
determining (E 4 ) by a unit ( 5 B) the detachment of the sensor device ( 9 A, 9 B, 9 C, 9 D) when the calculated distance (D) is different from the assembly distance (D 1 , D 1 ′) of the sensor device ( 9 A, 9 B, 9 C, 9 D) in the wheel ( 3 A, 3 B, 3 C, 3 D),
wherein the acquisition step includes an estimation of the angular-speed value (ω 1 , ω 2 , ω 3 , ω 4 ) of the wheel ( 3 A, 3 B, 3 C, 3 D) 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 ( 9 A, 9 B, 9 C, 9 D) mounted on a wheel ( 3 A, 3 B, 3 C, 3 D) of a motor vehicle ( 1 ) at an assembly distance (D 1 , D 1 ′) from the center (C) of said wheel ( 3 A, 3 B, 3 C, 3 D), said detection device comprising:
a unit ( 7 A, 7 B, 7 C, 7 D) for acquiring the angular-speed value (ω 1 , ω 2 , ω 3 , ω 4 ) of the wheel ( 3 A, 3 B, 3 C, 3 D),
a unit ( 17 A, 17 B, 17 C, 17 D) for measuring the acceleration value (a 1 , a 2 , a 3 , a 4 ) of said sensor device ( 9 A, 9 B, 9 C, 9 D),
a unit ( 5 A) for calculating the distance (D) separating the sensor device ( 9 A, 9 B, 9 C, 9 D) from the center (C) of the wheel ( 3 A, 3 B, 3 C, 3 D) using an angular-speed value (ω 1 , ω 2 , ω 3 , ω 4 ) and an acceleration value (a 1 , a 2 , a 3 , a 4 ),
unit ( 5 B) for determining the detachment of the sensor device ( 9 A, 9 B, 9 C, 9 D) when the calculated distance (D) is different from the assembly distance (D 1 , D 1 ′) of the sensor device ( 9 A, 9 B, 9 C, 9 D) 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 ( 3 A, 3 B, 3 C, 3 D) includes one sensor ( 7 A, 7 B, 7 C, 7 D) of angular speed (ω 1 , ω 2 , ω 3 , ω 4 ) per wheel ( 3 A, 3 B, 3 C, 3 D).

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

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

Assignees

• Continental Automotive France
• Continental Automotive Gmbh

Inventors

• Cimponeriu Andrei
• Fudelea Olivier

Classifications

• B60C23/0481 Primary

  System diagnostic, e.g. monitoring battery voltage, detecting hardware detachments or identifying wireless transmission failures · CPC title

• G07C5/02

  Registering or indicating driving, working, idle, or waiting time only (apparatus forming part of taximeters G07B13/00) · CPC title

• G07C5/0808 Primary

  Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005) · CPC title

• G01P3/00

  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 title

• B60C23/0488

  Movement sensor, e.g. for sensing angular speed, acceleration or centripetal force · CPC title