Vehicular system and handset of vehicular system

• US 20100207753A1
• Filed: 02/11/2010
• Published: 08/19/2010
• Est. Priority Date: 02/16/2009
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Sugiura, Masahiro
• Granted Patent: US 8,421,612 B2
• Time in Patent Office: Days
• US Class Current: 340/447
• 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 23/0433 Radio signals
• CPC Class Codes: B60C 23/0479 Communicating with external units being not part of the vehicle, e.g. tools for diagnostic, mobile phones, electronic keys or service stations

Abstract

An in-vehicle apparatus allows the user to check and adjust tire pressure whenever he/she thinks of doing it, by transmitting, from a portable unit that is carried by the user, a start request signal through UHF band electric wave to forcefully operate sensor units for detecting the tire pressure in each of the tires of the automobile, by collecting the tire pressure information to a control unit of the in-vehicle apparatus, and by displaying the tire pressure on a display unit of the portable unit when the tire pressure information is transmitted from a Bluetooth unit of the in-vehicle apparatus to a Bluetooth unit of the portable unit.

Claims

1. A vehicular system comprising:

a pressure detector for detecting a tire pressure of a vehicle; and

a handset that is carried by a user, wherein

the handset includes;

a transmission unit for wirelessly transmitting a forced-operation signal to forcefully operate the pressure detector; and

a receiver unit for wirelessly receiving tire pressure information detected by the pressure detector.

2. The vehicular system of claim 1 further comprising:

a display unit in the handset for displaying the tire pressure information received by the receiver unit.

3. The vehicular system of claim 1 further comprising:

a communication terminal that is carried by the user, wherein

the communication terminal includes;

a terminal transmitter for wirelessly transmitting the forced-operation signal for forcefully operate the pressure detector to the handset, whereby controlling the transmission unit to transmit the force-operation signal;

a first terminal receiver for wirelessly acquiring the tire pressure information from the handset; and

a terminal display for displaying the tire pressure information received by the first terminal receiver.

4. The vehicular system of claim 1 further comprising:

a communication terminal that is carried by the user, wherein

the communication terminal includes;

a terminal transmitter for wirelessly transmitting the forced-operation signal for forcefully operate the pressure detector to the handset, whereby controlling the transmission unit to transmit the force-operation signal;

a second terminal receiver for wirelessly acquiring the tire pressure information from the pressure detector; and

a terminal display for displaying the tire pressure information received by the second terminal receiver.

6. The vehicular system of claim 1, wherein

the pressure detector includes:

a tire sensor disposed in each tire for detecting air pressure in each tire;

a wireless communication unit for transmitting the tire pressure information detected by the tire sensor in each tire;

a collection unit for collecting the tire pressure information by receiving the tire pressure information transmitted by the wireless communication unit;

a detector transmitter for transmitting the tire pressure information collected by the collection unit; and

a detection signal transmitter for transmitting to each of the tire sensor a detection instruction signal for pressure detection when the forced-operation signal is transmitted from the transmission unit of the handset,

the tire pressure information is collected by the collection unit from each tire in response to the detection instruction signal transmitted from the detection signal transmitter, and

the collected tire pressure information is transmitted from the detector transmitter.

7. The vehicular system of claim 6, wherein

the receiver unit receives the tire pressure information from the detector transmitter for acquiring the tire pressure information from the pressure detector in each tire.

8. The vehicular system of claim 6, wherein

the second terminal receiver receives the tire pressure information from the detector transmitter for acquiring the tire pressure information from the pressure detector in each tire.

9. The vehicular system of claim 6, wherein

the forced-operation signal from the transmission unit of the handset is transmitted in UHF band radio wave, and

the tire pressure information from the detector transmitter of the pressure detector is transmitted according to a communication protocol in the Bluetooth communication standard.

10. The vehicular system of claim 6, wherein

the detection signal transmitter transmits the detection instruction signal one by one to the tire sensor in each tire in order, and

the collection unit collects the tire pressure information one by one from the tire sensor in each tire in response to the detection instruction signal transmitted from the detection signal transmitter.

11. The vehicular system of claim 10 further comprising:

a first determination unit for determining whether any tire sensor transmits a pressure change exceeding a threshold based on the tire pressure information collected by the collection unit, wherein,

when at least one of the tire sensor is determined by the first determination unit to transmit the pressure change exceeding the threshold, the detection instruction signal is transmitted only to the tire sensor that is determined to transmit the pressure change exceeding the threshold, in order to collect the tire pressure information from the tire sensor.

12. The vehicular system of claim 11 further comprising:

a second determination unit for determining whether the tire sensor determined to have exceeding-the-threshold pressure change by the first determination unit has a stable tire pressure for a predetermined period

13. The vehicular system of claim 1 further comprising:

the pressure detector includes;

a tire sensor disposed in each tire for detecting air pressure in each tire;

a wireless communication unit for transmitting the tire pressure information detected by the tire sensor in each tire;

a detection signal transmitter for transmitting to each of the tire sensor a detection instruction signal for pressure detection when the forced-operation signal is transmitted from the transmission unit of the handset.

14. The vehicular system of claim 13, wherein

the receiver unit receives the tire pressure information from the wireless communication unit for acquiring the tire pressure information from the pressure detector in each tire.

15. The vehicular system of claim 13, wherein

the forced-operation signal from the transmission unit of the handset is transmitted in UHF band radio wave, and

the tire pressure information from the wireless communication unit of the pressure detector is transmitted in UHF band radio wave in a different frequency used by the transmission unit.

16. The vehicular system of claim 15, wherein

the receiver unit of the handset is capable of receiving multiple frequencies of UHF band radio wave in a switchable manner, so that the receiver unit receives both of a response signal transmitted in response to the forced-operation signal from the transmission unit of the handset in one UHF band frequency and the tire pressure information transmitted from the wireless communication unit of the pressure detector in another UHF band frequency.

17. The vehicular system of claim 1, wherein

the handset is equipped with an electric key function of the vehicle.

5. The vehicular system of claim, wherein

the communication terminal is a cellular phone.

18. A handset of a vehicular system which is carried by a user comprising:

a transmission unit for wirelessly transmitting a forced-operation signal to forcefully operate a pressure detector disposed in a vehicle;

a receiver unit for wirelessly receiving tire pressure information detected by the pressure detector; and

a display unit in the handset for displaying the tire pressure information received by the receiver unit.

19. A handset of a vehicular system which is carried by a user comprising:

a handset transmission unit for wirelessly transmitting a forced-operation signal to forcefully operate a pressure detector disposed in a vehicle;

a handset receiver unit for wirelessly receiving tire pressure information detected by the pressure detector; and

a mediation unit for wirelessly transmitting the tire pressure information received by the receiver unit to a communication terminal having a terminal display for displaying the tire pressure information received by the handset receiver unit.