System for determining abnomalities of tpms and method of determination

Patent metadata

Field	Value
Publication number	US-2021316576-A1
Application number	US-202117225846-A
Country	US
Kind code	A1
Filing date	Apr 8, 2021
Priority date	Apr 10, 2020
Publication date	Oct 14, 2021
Grant date	—

Abstract

A system for determining abnormalities of a TPMS that includes a pressure sensor that senses a pressure inside a tire and transmits sensed pressure data as a radio signal, a reception unit that receives the radio signal from the pressure sensor and measures strength of the received radio signal, and a determination unit that determines an abnormality of the TPMS based on the radio signal received, and the strength of the radio signal measured, by the reception unit.

First claim

What is claimed is:

1 . A system for determining abnormalities of a tire pressure monitoring system (TPMS), the system comprising:
a pressure sensor that senses a pressure inside a tire and transmits sensed pressure data as a radio signal; a reception unit that receives the radio signal from the pressure sensor and measures strength of the received radio signal; and a determination unit that determines an abnormality of the TPMS based on the radio signal received, and the strength of the radio signal measured, by the reception unit.

2 . The system for determining abnormalities of TPMS according to claim 1 , wherein
the reception unit measures strengths of a plurality of additional radio signals for a predetermined second time period at an interval of a predetermined first time period, and the system further comprises a volatile memory that stores the strengths of the plurality of additional radio signals measured by the reception unit.

3 . The system for determining abnormalities of TPMS according to claim 2 , wherein
the determination unit determines that the abnormality is caused by a radio noise when an average value of the strengths stored in the volatile memory is greater than a predetermined reference value while no data of the pressure sensor is received by the reception unit for a predetermined second time period.

4 . The system for determining abnormalities of TPMS according to claim 2 , wherein
the determination unit determines that the pressure sensor is abnormal when an average value of the strengths stored in the volatile memory is less than a predetermined reference value while no data of the pressure sensor is received by the reception unit for a predetermined second time period.

5 . The system for determining abnormalities of TPMS according to claim 1 further includes a control unit that controls the pressure sensor to change a data transmission means based on the TPMS abnormality as determined by the determination unit.

6 . The system for determining abnormalities of TPMS according to claim 5 , wherein
the control unit changes a communication means of the pressure sensor from a radio signal to Bluetooth so as to transmit the pressure data of the pressure sensor to a Bluetooth module of a vehicle.

7 . The system for determining abnormalities of TPMS according to claim 5 , wherein
the control unit changes a communication means of the pressure sensor from a radio signal to Bluetooth so as to transmit the pressure data of the pressure sensor to a mobile terminal of a passenger.

8 . The system for determining abnormalities of TPMS according to claim 2 further includes a nonvolatile memory that stores the strengths of the plurality of additional radio signals stored in the volatile memory when the determination unit determines that the abnormality is caused by a radio noise, wherein
the determination unit determines that the abnormality is caused by a radio noise based on the strengths of the plurality of additional radio signals measured by the reception unit at the interval of the predetermined first time period and the strengths of the plurality of additional radio signals stored in the nonvolatile memory.

9 . The system for determining abnormalities of TPMS according to claim 8 , wherein
the determination unit compares the strength of the radio signal stored in the volatile memory with the strength of the radio signal stored in the nonvolatile memory and determines that the abnormality is caused by the radio noise when the strength of the radio signal stored in the nonvolatile memory is greater.

10 . A method of determining abnormalities of a tire pressure monitoring system (TPMS), the method comprising:
a signal transmission step of converting data of a pressure sensor that measures a pressure of a tire into a radio signal and transmitting the radio signal; a reception step of receiving the radio signal of the pressure sensor transmitted in the signal transmission step and measuring a strength of the radio signal; and a determination step of determining an abnormality of the TPMS based on the radio signal received, and the strength of the radio signal measured, in the reception step.

11 . The method of determining abnormalities of TPMS according to claim 10 further includes a first storage step of storing strengths of a plurality of additional radio signals at an interval of a predetermined first time period in a volatile memory after the reception step.

12 . The method of determining abnormalities of TPMS according to claim 11 , wherein
the determination step proceeds to a first determination step of determining that an abnormality is caused by a radio noise when an average value of the strengths stored in the first storage step is greater than a predetermined reference value.

13 . The method of determining abnormalities of TPMS according to claim 12 further includes a second storage step of storing in a nonvolatile memory the strength of the plurality of additional radio signals stored in the volatile memory after the first determination step, wherein
it is subsequently determined in the determination step that the abnormality is caused by a radio noise, based on the strengths of the plurality of additional radio signals stored in the first storage step and the second storage step.

14 . The method of determining abnormalities of TPMS according to claim 13 further includes a sensor control step of changing a transmission means of the pressure sensor after the second storage step.

15 . The method of determining abnormalities of TPMS according to claim 11 , wherein
the determination step proceeds to a second determination step of determining that the pressure sensor is abnormal when an average value of the strength of a plurality of radio signals stored in the first storage step is less than a predetermined strength of a radio signal.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Park Bok Man

Classifications

• G01L27/007

  Malfunction diagnosis, i.e. diagnosing a sensor defect · CPC title

• B60W2050/0019

  Control system elements or transfer functions · CPC title

• B60W2050/021

  Means for detecting failure or malfunction · CPC title

• B60Y2400/306

  Pressure sensors · CPC title

• B60W50/0205 Primary

  Diagnosing or detecting failures; Failure detection models · CPC title