Tire condition monitoring system, transmitter, and receiver

Patent metadata

Field	Value
Publication number	US-11092516-B2
Application number	US-201816605851-A
Country	US
Kind code	B2
Filing date	Oct 1, 2018
Priority date	Oct 1, 2018
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A tire condition monitoring system includes transmitters that are respectively attached to wheel assemblies of a vehicle. Each transmitter includes a power source, a data generating section, a storage section that stores a correspondence relationship in which ranges obtained by dividing possible values of the detection value of a traveling state detecting section are respectively assigned to a plurality of specific angles set for the rotation angles of the wheel assemblies, and a transmission control section capable of performing specific angle transmission in which the transmission control section transmits the transmission data from the transmitting section when detecting that the rotation angle of the wheel assembly is any of the specific angles. When performing the specific angle transmission, the transmission control section transmits the transmission data when detecting that the rotation angle is the specific angle that corresponds to the detection value of the traveling state detecting section.

First claim

The invention claimed is:

1. A tire condition monitoring system comprising:
transmitters respectively attached to a plurality of wheel assemblies of a vehicle; and
a receiver mounted on the vehicle, wherein
the vehicle includes rotation angle detecting sections that detect rotation angles of the respective wheel assemblies,
each of the transmitters includes
a power source of the transmitter,
a condition detecting section that is configured to detect a condition of a tire,
a traveling state detecting section that is configured such that a detection value varies in accordance with a traveling state of the vehicle, wherein the traveling state detection section is an acceleration sensor configured to detect an acceleration generated by rotation of a corresponding one of the plurality of wheel assemblies, wherein a detection value of the acceleration sensor varies in accordance with a vehicle speed, and a specific angle can be determined based on the detection value of the acceleration sensor,
a data generating section that is configured to generate transmission data that includes tire condition data indicating the condition of the tire detected by the condition detecting section and does not include data indicating the detection value of the traveling state detecting section,
a transmitting section that is configured to modulate the transmission data, which is generated by the data generating section, and transmit the modulated data,
a storage section that stores a correspondence relationship in which ranges obtained by dividing possible values of the detection value of the traveling state detecting section are respectively assigned to a plurality of specific angles set for rotation angles of the wheel assemblies, and
a transmission control section capable of performing specific angle transmission in which the transmission control section transmits the transmission data from the transmitting section when detecting that the rotation angle of the wheel assembly is any of the specific angles,

the transmission control section is configured to, when performing the specific angle transmission, transmit the transmission data when detecting that the rotation angle of the wheel assembly is the specific angle that corresponds to the detection value of the traveling state detecting section,
the receiver includes
a reception control section,
a receiving section that is configured to be capable of receiving the transmission data from the transmitters and output the transmission data from the transmitter to the reception control section,
an identifying section that, upon reception of the transmission data transmitted at the specific angle, identifies one of the wheel assemblies to which the transmitter is attached based on an angle detection value obtained from the rotation angle detecting section,
a reception storage section that stores the correspondence relationship, and
an obtaining section that obtains the detection value from a vehicle-side traveling state detecting section that is different from a member constituting the transmitter, and

the identifying section is configured to
acquire the specific angle at which the transmission data has been transmitted from the correspondence relationship and the detection value that is obtained by the obtaining section upon reception of the transmission data by the receiving section, and
identify one of the wheel assemblies to which the transmitter is attached based on the specific angle,

wherein the speed of the vehicle can be detected by both the transmission control section and the reception control section.

2. A transmitter that is attached to each of a plurality of wheel assemblies, wherein
a vehicle includes rotation angle detecting sections that detect rotation angles of the respective wheel assemblies,
the transmitter includes
a power source of the transmitter,
a condition detecting section that is configured to detect a condition of a tire,
a traveling state detecting section that is configured such that a detection value varies in accordance with a traveling state of the vehicle, wherein the traveling state detecting section is an acceleration sensor, and wherein a detection value of the acceleration sensor varies in accordance with a vehicle speed, and a specific angle can be determined based on the detection value of the acceleration sensor,
a data generating section that is configured to generate transmission data that includes tire condition data indicating the condition of the tire detected by the condition detecting section and does not include data indicating the detection value of the traveling state detecting section,
a transmitting section that is configured to modulate the transmission data, which is generated by the data generating section, and transmit the modulated data,
a storage section that stores a correspondence relationship in which ranges obtained by dividing possible values of the detection value of the traveling state detecting section are respectively assigned to a plurality of specific angles set for rotation angles of the wheel assemblies, and
a transmission control section capable of performing specific angle transmission in which the transmission control section transmits, to a receiver, the transmission data from the transmitting section when detecting that the rotation angle of the wheel assembly is any of the specific angles, the receiver including a reception control section, a reception storage section that stores the correspondence relationship, an obtaining section that obtains the detection value from a vehicle-side traveling state detecting section that is different from a member constituting the transmitter, and an identifying section that, upon reception of the transmission data, identifies a position of the wheel assembly to which the transmitter is attached based on an angle detection value obtained from the rotation angle detecting section, and
the transmission control section is configured to, when performing the specific angle transmission, transmit the transmission data when detecting that the rotation angle of the wheel assembly is the specific angle that corresponds to the detection value of the traveling state detecting section,
wherein the speed of the vehicle can be detected by both the transmission control section and the reception control section.

3. A receiver mounted on a vehicle that includes rotation angle detecting sections that detect rotation angles of respective wheel assemblies, the receiver comprising:
a reception control section that is configured to be capable of receiving transmission data from a transmitter capable of transmitting the transmission data when detecting that a rotation angle of the wheel assembly is a specific angle, wherein the transmitter includes a transmission control section, wherein the specific angle is based on an assigned range of detection values provided by a traveling state detecting section within the transmitter, and wherein the traveling state detecting section is an acceleration sensor, and wherein a detection value of the acceleration sensor varies in accordance with a vehicle speed, and a specific angle can be determined based on the detection value of the acceleration sensor;
an identifying section that, upon reception of the transmission data transmitted at the specific angle, identifies one of the wheel assemblies to which the transmitter is attached based on an angle detection value obtained from the rotation angle detecting section,
a reception storage section that stores a correspondence relationship in which ranges obtained by dividing possible values of a detection value that changes in accordance with a rotation speed of the wheel assembly are respectively assigned to a plurality of specific angles set for rotation angles of the wheel assemblies, and
an obtaining section that

Assignees

• Taiheiyo Kogyo Kk

Inventors

• Tsujita Yasuhisa

Classifications

• G08C17/00

  Arrangements for transmitting signals characterised by the use of a wireless electrical link · CPC title

• B60C23/0422

  characterised by the type of signal transmission means · CPC title

• G01M17/02 Primary

  Tyres · CPC title

• B60C23/0416 Primary

  allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right · CPC title

• B60C23/0459

  self triggered by motion sensor · CPC title