Tire monitoring system

• US 20050231346A1
• Filed: 11/14/2002
• Published: 10/20/2005
• Est. Priority Date: 11/16/2001
• Status: Abandoned Application

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Ichinose, Hidemi, Kono, Yasuhiro
• Application Number:
  US10/495,706
• Publication Number:
  US 20050231346A1
• Time in Patent Office: Days
• US Class Current: 340/447
• CPC Class Codes: B60C 23/041 Means for supplying power to the signal- transmitting means on the wheel
• CPC Class Codes: H04B 5/48 Transceivers
• CPC Class Codes: H04B 5/73 for taking measurements, e.g. using sensing coils

Abstract

According to the present invention, there is provided a tire monitoring system in which electric power is fed from a car body to a tire sensor unit in a non-contact manner. The tire sensor unit 10 (10a-10d) is mounted on a corresponding tire 2 (2a-2d) of a car, and electric power is radio-transmitted from a corresponding non-contact type power supply portion 40 (40a-40d) provided in the car body to the tire sensor unit 10 by electromagnetic induction or by microwaves. The tire sensor unit 10 is provided with a non-contact type power receiving portion which generates direct-current power by energy transmitted from the non-contact type power supply portion 40 so as to supply electric power necessary for activating the tire sensor unit 10. The tire sensor unit 10 senses air pressure or the like, and radio-transmits the information to the receiving device 20.

Claims

1. A tire monitoring system comprising:

a tire sensor unit which is mounted on each tire of a car to radio-transmit information on tire pressure and tire temperature;

a receiving device which is provided in the car body to receive the information on the tire pressure and the tire temperature transmitted from the tire sensor unit, and

a display device to display the tire condition based on the information received at the receiving device, and

further comprising;

a non-contact type power supply portion which is provided in the car body to radio-transmit energy; and

a non-contact type power receiving portion which is provided in the tire sensor unit to generate direct-current power by the energy transmitted from the non-contact type power supply portion,

wherein electric power necessary for activating the tire sensor unit is supplied from the non-contact type power receiving portion, and

wherein the display device is provided with a tire abnormality judging section, a warning lamp, and a warning buzzer, and the tire abnormality judging section judges the tire to be abnormal when the tire pressure and the tire internal temperature vary from a predetermined value and outputs to the warning lamp and the warning buzzer.

2. The tire sensor unit according to claim 1, wherein the radio-transmission of energy from the non-contact type power supply portion to the non-contact type power receiving portion is conducted by electromagnetic induction.

3. The tire sensor unit according to claim 1, wherein the radio-transmission of energy from the non-contact type power supply portion to the non-contact type power receiving portion is conducted by microwaves.