Method for determining tire installation location, tire pressure monitoring device and system

• US 10,457,103 B2
• Filed: 04/05/2018
• Issued: 10/29/2019
• Est. Priority Date: 04/26/2017
• Status: Active Grant

• Current Assignee: Nanjing Silergy Semiconductor (Hong Kong) Technology Ltd.
• Original Assignee: Silergy Semiconductor Technology (Hangzhou) Ltd. (Silergy Corporation)
• Inventors: Liu, Chi-Kang
• Primary Examiner(s): Feild, Joseph H
• Assistant Examiner(s): Mahase, Pameshanand
• Application Number:
  US15/945,870
• Publication Number:
  US 20180312021A1
• Time in Patent Office: 572 Days
• CPC Class Codes: B60C 23/0416 allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
• CPC Class Codes: B60C 23/0486 comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
• CPC Class Codes: B60C 23/0489 for detecting the actual angular position of the monitoring device while the wheel is turning
• CPC Class Codes: G08C 17/04 using magnetically coupled devices
• CPC Class Codes: H04Q 2209/40 using a wireless architecture
• CPC Class Codes: H04Q 2209/88 Providing power supply at the sub-station
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

Determining installation positions of tires can include: measuring, by a magnetic sensor provided in each tire in the same manner, a first magnetic field strength in a first direction and a second magnetic field strength in a second direction, where the first direction is a circumferential or axial direction of the tire and the second direction is a radial direction of the tire; acquiring a first magnetic field strength sampling value of the tire by sampling the first magnetic field strength; acquiring a second magnetic field strength sampling value of the tire by sampling the second magnetic field strength; calculating a difference between the first and second magnetic field strength sampling values; and determining whether the installation position of the tire is on the left or right side of a vehicle according to a change trend of the calculated difference of the tire.

Claims

1. A method of determining installation positions of tires, the method comprising:

a) measuring, by a magnetic sensor provided in each tire in the same manner, a first magnetic field strength in a first direction and a second magnetic field strength in a second direction, wherein said first direction is a circumferential or axial direction of said tire and said second direction is a radial direction of said tire;

b) acquiring, by a controller, a first magnetic field strength sampling value of said tire by sampling said first magnetic field strength received from said magnetic sensor;

c) acquiring, by said controller, a second magnetic field strength sampling value of said tire by sampling said second magnetic field strength received from said magnetic sensor;

d) calculating, by said controller, a difference between said first magnetic field strength sampling value and said second magnetic field strength sampling value of said tire;

e) determining, by said controller, whether said installation position of said tire is on the left side or the right side of a vehicle according to a change trend of said calculated difference of said tire; and

f) providing said installation position of said tire to a communication component, wherein said magnetic sensor, said communication component, and said controller receive a power supply from a power management circuit.

2. The method of claim 1, wherein a sampling rate for acquiring said first magnetic field strength sampling value and said second magnetic field strength sampling value of said tire is less than a tire rotation speed.

3. The method of claim 1, wherein said determining whether said installation position of said tire is on the left side or the right side of said vehicle comprises using a change magnitude of said calculated difference of said tire.

4. The method of claim 1, further comprising determining whether said installation position of said tire is on the front side or the rear side of said vehicle according to a change magnitude of at least one of said first magnetic field strength sampling value and said second magnetic field strength sampling value of said tire.

5. A tire pressure monitoring device for determining installation positions of tires, the tire pressure monitoring device comprising:

a) a magnetic sensor provided in each tire in the same manner, wherein said magnetic sensor is configured to a first magnetic field strength in a first direction and a second magnetic field strength in a second direction, wherein said first direction is a circumferential or axial direction of said tire and said second direction is a radial direction of said tire;

b) a controller configured to acquire a first magnetic field strength sampling value of said tire by sampling said first magnetic field strength, and a second magnetic field strength sampling value of said tire by sampling said second magnetic field strength;

c) said controller being configured to calculate a difference between said first magnetic field strength sampling value and said second magnetic field strength sampling value of said tire; and

d) said controller being configured to determine whether said installation position of said tire is on the left side or the right side of a vehicle according to a change trend of said calculated difference of said tire.

6. The tire pressure monitoring device of claim 5, wherein a sampling rate for acquiring said first magnetic field strength sampling value and said second magnetic field strength sampling value of said tire is less than a tire rotation speed.

7. The tire pressure monitoring device of claim 5, wherein said determination of whether said installation position of said tire is on the left side or the right side of said vehicle comprises using a change magnitude of said calculated difference of said tire.

8. The tire pressure monitoring device of claim 5, wherein said controller is configured to determine whether said installation position of said tire is on the front side or the rear side of said vehicle according to a change magnitude of at least one of said first magnetic field strength sampling value and said second magnetic field strength sampling value of said tire.

9. The tire pressure monitoring device of claim 5, further comprising a communication component coupled to said controller, and being configured to transmit said determined installation positions of said tires.

10. A tire pressure monitoring system, comprising:

a) a plurality of tire pressure monitoring devices provided in each tire in the same manner;

b) a data processing device communicatively coupled to said tire pressure monitoring devices;

c) each of said plurality of tire pressure monitoring devices comprising a magnetic sensor for measuring a first magnetic field strength in a first direction and a second magnetic field strength in a second direction, wherein said first direction is a circumferential or axial direction of said tire and said second direction is a radial direction of said tire;

d) each of said plurality of tire pressure monitoring devices further comprising a controller configured to acquire a first magnetic field strength sampling value and a second magnetic field strength sampling value of each tire, and to transmit to said data processing device; and

e) said data processing device being configured to calculate a difference between said first magnetic field strength sampling value and said second magnetic field strength sampling value of each tire, and determining whether the installation position of said tire is on the left side or the right side of a vehicle according to a change trend in said difference of each tire.

11. The system of claim 10, wherein a sampling rate for acquiring said first magnetic field strength sampling value and said second magnetic field strength sampling value of said tire is less than a tire rotation speed or is not related to said tire rotation speed.

12. The system of claim 10, wherein said data processing device is configured to determine whether said installation position of said tire is on said left side or said right side of said vehicle according to the change magnitude of said difference of said tire.

13. The system of claim 10, wherein said data processing device is configured to determine whether said installation position of said tire is on the front side or the rear side of said vehicle according to said change magnitude of said first magnetic field strength sampling value or said second magnetic field strength sampling of said tire.