Tire identification code registration system

• US 9,428,015 B2
• Filed: 09/11/2014
• Issued: 08/30/2016
• Est. Priority Date: 09/19/2013
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Tokai RIKA Denki Seisakusho
• Original Assignee: Kabushiki Kaisha Tokai RIKA Denki Seisakusho
• Inventors: Kitagawa, Kei, Shibata, Yasuhiro, Kumagai, Katsuhide
• Primary Examiner(s): Wang, Jack K
• Application Number:
  US14/483,533
• Publication Number:
  US 20150077238A1
• Time in Patent Office: 719 Days
• Field of Search: 340/447, 340/442, 340/444, 340/807.16, 340/445
• US Class Current: 1/1
• CPC Class Codes: B60C 23/0415 Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels

Abstract

A tire identification code registration system for use with tire pressure detectors and a tire pressure monitoring system (TMPS) receiver. Each tire pressure detector, which includes a unique tire identification code, is coupled to a tire to detect the pressure of the tire and transmit a tire pressure signal. The receiver receives the tire pressure signal and monitors the pressure of the tire. The tire identification code registration system includes a storage manager that stores, in a memory, tire identification codes included in wireless signals received during a predetermined storage period as candidate tire identification codes. A registration unit registers the candidate tire identification codes in the memory as formal tire identification codes after the storage performed by the storage manager when the number of the candidate tire identification codes in the memory is equal to a predetermined storage number.

Claims

1. A tire identification code registration system for use with a plurality of tire pressure detectors and a tire pressure monitoring system receiver, wherein each of the tire pressure detectors includes a unique tire identification code and is configured to be coupled to a tire, each of the tire pressure detectors is configured to detect pressure of a corresponding tire and transmit a wireless signal that includes tire pressure information, and the receiver is configured to receive the wireless signal and monitor the pressure of the corresponding tire based on the received wireless signal,

the tire identification code registration system comprising:

a storage manager configured to store, in a memory, tire identification codes included in wireless signals received during a predetermined storage period as candidate tire identification codes;

a registration processor configured to register the candidate tire identification codes in the memory as formal tire identification codes after the candidate tire identification codes are stored in the memory by the storage manager, when a number of candidate tire identification codes stored in the memory is equal to a predetermined storage number; and

a deletion processor that deletes a candidate identification code from the candidate identification codes stored in the memory, when the number of candidate identification codes stored in the memory is greater than the predetermined storage number, and when the candidate tire identification code is not included in a wireless signal received during a predetermined deletion period.

2. The tire identification code registration system according to claim 1, wherein

the storage manager is configured to store, in the memory, tire identification codes included in wireless signals received during a period in which a detected vehicle speed is greater than a travel determination reference value;

and

the storage manager is configured not to store, in the memory, tire identification codes included in wireless signals received during a period in which the detected vehicle speed is less than or equal to the travel determination reference value.

3. The tire identification code registration system according to claim 1, wherein, when the number of candidate tire identification codes stored in the memory subsequent to the deletion is greater than the predetermined storage number, the deletion processor repeats the deletion.

4. The tire identification code registration system according to claim 1, wherein the storage manager does not store, in the memory, a tire identification code included in a wireless signal received during the predetermined deletion period.

5. The tire identification code registration system according to claim 1, wherein the predetermined deletion period has a duration in which each of the tire pressure detectors transmits the wireless signals, each including the tire identification code a plurality of times.

6. The tire identification code registration system according to claim 5, further comprising:

a transmission controller installed in each of the tire pressure detectors, wherein the transmission controller detects rotation of the corresponding tire and transmits the wireless signals more frequently when the detected tire rotation exceeds a rotation reference value; and

a duration setting processor installed in the receiver, wherein the duration setting processor changes the duration of the predetermined deletion period in accordance with a detected vehicle speed.

7. The tire identification code registration system according to claim 1, wherein the predetermined storage period has a duration in which each of the tire pressure detectors transmits the wireless signals, each including the tire identification code, a plurality of times.

8. The tire identification code registration system according to claim 7, further comprising:

a transmission controller installed in each of the tire pressure detectors, wherein the transmission controller detects rotation of the corresponding tire and transmits the wireless signals more frequently when the detected tire rotation exceeds a rotation reference value; and

a duration setting processor installed in the receiver, wherein the duration setting processor changes the duration of the predetermined storage period in accordance with a detected vehicle speed.

9. The tire identification code registration system according to claim 1, further comprising a registration termination processor installed in the receiver, wherein, when the number of candidate tire identification codes stored in the memory continues to be equal to the predetermined storage number over a predetermined storage period or longer, the registration termination processor switches an operation mode of the receiver from a tire identification code registration mode to a non-registration mode.

10. The tire identification code registration system according to claim 1, further comprising a registration termination processor installed in the receiver, wherein, when the number of the candidate tire identification codes in the memory is less than the predetermined storage number, the registration termination processor switches an operation mode of the receiver from a tire identification code registration mode to a non-registration mode.

11. The tire identification code registration system according to claim 1, wherein

the storage manager includes a presumption condition and is configured to use the presumption condition to presume that a wireless signal received during the predetermined storage period is transmitted from another vehicle, and

in the tire identification codes included in the wireless signals received during the predetermined storage period, the storage manager is configured not to store a tire identification code included in a wireless signal presumed to be transmitted from another vehicle.

12. A controller for a tire pressure monitoring system, the controller comprising:

a volatile memory;

a nonvolatile memory; and

a computer processor coupled to the volatile memory and the nonvolatile memory, the computer processor configured to;

store, in the volatile memory, a tire identification code included in each tire pressure signal received during a predetermined storage period, as a candidate tire identification code,

register, to the nonvolatile memory, the candidate tire identification code as a formal tire identification code, when a number of candidate tire identification codes stored in the volatile memory at an end of the predetermined storage period is equal to a predetermined storage number;

delete a candidate tire identification code that meets a deletion condition from the volatile memory, when if the number of candidate tire identification codes stored in the volatile memory at the end of the predetermined storage period is greater than the predetermined storage number; and

delete a candidate tire identification code from the memory, when the candidate tire identification code is not included in a tire pressure signal received during a predetermined deletion period.

13. A tire pressure monitoring system comprising:

a tire pressure detector including a unique tire identification code, wherein the tire pressure detector is coupled to a tire and configured to detect pressure of the tire and transmit a wireless signal that includes tire pressure information;

a receiver configured to receive the wireless signal and monitor the pressure of the corresponding tire based on the wireless signal; and

the controller according to claim 12, wherein the controller is installed in or coupled to the receiver.

14. A non-transitory computer-readable storage medium storing instructions that cause a computer processor to execute a tire identification code registration method, the instructions comprising:

instructions configured to store, in a volatile memory of a tire identification code registration system, a tire identification code included in each tire pressure signal received during a predetermined storage period as a candidate tire identification code;

instructions configured to register, to a nonvolatile memory of the tire identification code registration system, each candidate tire identification code in the volatile memory as a formal tire identification code, when a number of candidate tire identification codes stored in the volatile memory at an end of the predetermined storage period is equal to a predetermined storage number; and

instructions configured to delete, from the volatile memory, a candidate tire identification code that meets a deletion condition, when the number of candidate tire identification codes stored in the volatile memory at the end of the predetermined storage period is greater than the predetermined storage number; and

instructions configured to delete a candidate tire identification code from the volatile memory, when the candidate tire identification code is not included in a tire pressure signal received during a predetermined deletion period.