Vehicle stationary/moving determination apparatus

• US 20080082220A1
• Filed: 09/28/2007
• Published: 04/03/2008
• Est. Priority Date: 09/29/2006
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Taguchi, Akihiro, Saito, Hideki, Watabe, Nobuya
• Granted Patent: US 7,826,936 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• 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: B60G 2204/115 Wheel hub bearing sensors
• CPC Class Codes: B60G 2400/208 of wheel rotation
• CPC Class Codes: B60G 2400/91 Frequency
• CPC Class Codes: B60W 2420/54 Audio sensitive means, e.g. ultrasound
• CPC Class Codes: B60W 2422/70 on the wheel or the tire
• CPC Class Codes: B60W 30/18 Propelling the vehicle
• CPC Class Codes: B60W 30/18054 at stand still, e.g. engine in idling state hill holding B60W30/18118
• CPC Class Codes: B60W 30/18063 Creeping
• CPC Class Codes: B60W 40/10 related to vehicle motion

Abstract

The vehicle stationary/moving determination apparatus includes an antenna mounted on a vehicle body of a vehicle; and a determination device determining whether or not the vehicle is moving or stationary on the basis of a reception intensity of a radio signal transmitted from a radio transmitter device mounted on the vehicle at a portion other than the vehicle body and received by the antenna.

Claims

1. A vehicle stationary/moving determination apparatus comprising:

an antenna mounted on a vehicle body of a vehicle; and

a determination device determining whether or not said vehicle is moving or stationary on the basis of a reception intensity of a radio signal transmitted from a radio transmitter device mounted on said vehicle at a portion other than said vehicle body and received by said antenna.

2. The vehicle stationary/moving determination apparatus according to claim 1 wherein said radio transmitter device is mounted on a wheel of said vehicle.

3. The vehicle stationary/moving determination apparatus according to claim 2 wherein said determination device determines a vehicle speed of said vehicle on the basis of a varying aspect of said reception intensity.

4. The vehicle stationary/moving determination apparatus according to claim 3 wherein said determination device stores therein intensity/angle corresponding relationship data representing a relationship between said reception intensity and an angle position of said wheel, and is configured to determine said vehicle speed corresponding to a rotation angle width of said wheel during a predetermined reference period by collating an aspect of temporal variation of said reception intensity during said reference period with said intensity/angle corresponding relationship data.