Pressure Sensor Mounting Method, Tire and Wheel Having Pressure Sensor, and Tire Pressure Detection Device

• US 20100147063A1
• Filed: 01/24/2007
• Published: 06/17/2010
• Est. Priority Date: 01/30/2006
• Status: Active Grant

• Current Assignee: Semiconductor Components Industries LLC (ON Semiconductor Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Suzuki, Hirohisa, Hasegawa, Kazuo, Akama, Eiji
• Granted Patent: US 8,176,776 B2
• Time in Patent Office: Days
• US Class Current: 73/146.500
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver

Abstract

The accuracy of a measurement value obtained by a tire pressure detection device is lowered by a centrifugal force and an inertial force during travel. A pressure sensor (30) displaces a diaphragm (20) in its vertical direction (32) according to the pressure. The pressure sensor (30) is arranged in a tire (2) with the vertical direction (32) directed to a direction parallel to a rotation axis (34) instead of the tire circumferential direction or radial direction. The pressure sensor (30) is mounted onto a substrate with the vertical direction (32) of its diaphragm (20) directed in parallel to the substrate surface and the substrate is bonded to a tread portion of the tire (2) and a wheel rim portion while adjusting the vertical direction (32) of the diaphragm (20) with the direction of the rotation axis (34).

Claims

1. A pressure sensor mounting method for mounting a pressure sensor having a displacement portion to be displaced according to air pressure, inside a tire of a vehicle, wherein

a displacement direction of the displacement portion is set parallel to a rotational axis of the tire.

2. A tire having a pressure sensor mounted thereon having a displacement portion to be displaced according to air pressure, wherein

a displacement direction of the displacement portion is set parallel to a rotational axis of the tire.

3. A wheel having a pressure sensor mounted thereon having a displacement portion to be displaced according to air pressure, wherein

a displacement direction of the displacement portion is set parallel to a rotational axis of the wheel.

4. A tire pressure detection device, mounted inside a tire of a vehicle, for detecting air pressure inside the tire, comprising:

a pressure sensor for measuring the air pressure, using a displacement portion to be displaced according to the air pressure; and

a circuit board having a response circuit mounted on a board surface thereof, the response circuit for sending, through interaction with a supply electromagnetic field applied from outside, data measured by the pressure sensor to the outside,

wherein

the pressure sensor is mounted on the circuit board such that a displacement direction of the displacement portion is set parallel to the board surface.

5. The tire pressure detection device according to claim 4, wherein

the circuit board is attached on a tread portion of the tire or a rim portion of a wheel on which the tire is mounted, such that the displacement direction of the displacement portion is set parallel to a rotational axis of the tire.