Transmitter and receiver for tire condition monitoring apparatus

• US 7,116,217 B2
• Filed: 07/16/2004
• Issued: 10/03/2006
• Est. Priority Date: 07/24/2003
• Status: Expired due to Fees

• Current Assignee: Pacific Industrial Company Limited
• Original Assignee: Pacific Industrial Company Limited
• Inventors: Okubo, Youichi
• Primary Examiner(s): Pope, Daryl C
• Application Number:
  US10/893,732
• Publication Number:
  US 20050030169A1
• Time in Patent Office: 809 Days
• Field of Search: 340442-448, 73146-1468
• US Class Current: 340/445
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0494 Valve stem attachments positioned inside the tyre chamber

Abstract

In an internal memory of a reception controller such as, for example, a ROM, a correction table is stored for correcting air pressure data. The reception controller receives a signal representing vehicle speed from a speedometer of the vehicle. The reception controller obtains a correction value from the correction table on the basis of the vehicle speed signal to add and deduct the correction value obtained and the air pressure data received. For this reason, the reception controller can obtain corrected air pressure data.

Claims

1. A tire condition monitoring apparatus for use in a tire of a vehicle, the tire condition monitoring apparatus comprising:

a transmitter provided in the tire of the vehicle and having a sensor for measuring a condition of the tire, wherein the transmitter wirelessly transmits data representing the condition of the tire measured by the sensor, wherein the sensor is provided such that the direction of normal to a measurement surface in the sensor is orthogonal to the direction of centrifugal force generated when the tire rotates.

2. The tire condition monitoring apparatus according to claim 1, further comprising a receiver for receiving and processing data wirelessly transmitted from the transmitter.

3. A tire condition monitoring apparatus for use with a tire of a vehicle, the tire condition monitoring apparatus comprising:

a transmitter for wirelessly transmitting data representing a condition of the tire of the vehicle;

a reception antenna provided in the vehicle for receiving the data from the transmitter;

a receiver for processing the data received by the reception antenna; and

reception correcting means for receiving a signal representing speed of the vehicle and correcting the received data on the basis of the signal representing the vehicle speed.

4. The tire condition monitoring apparatus according to claim 3, further comprising measuring means provided in the tire of the vehicle for measuring the condition of the tire.