Data processing: measuring – calibrating – or testing – Measurement system – Pressure
Patent
1996-09-16
1999-07-13
Shah, Kamini
Data processing: measuring, calibrating, or testing
Measurement system
Pressure
340447, 731465, B60C 2302
Patent
active
059240555
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a vehicle tire air pressure monitor for monitoring the air pressure of a tire of a vehicle.
BACKGROUND ART
Conventionally, setting the air pressure of a tire of a vehicle to a proper state is one of the items which must be observed for safety traveling of the vehicle. For example, when the air pressure of a tire lowers, the blowout rate increases and a burst occurs in high-speed traveling of a vehicle and this may cause a serious accident.
Therefore, a driver must usually check the air pressure of a tire. To check the air pressure of a tire, the air pressure has been measured for each tire by pressing a pressure measuring instrument against a valve provided on the rim of a wheel.
However, it takes a lot of time to measure the air pressure of each tire as described above and moreover, measuring the air pressure is very difficult for female drivers who have suddenly been increased in recent years. Therefore, there is a problem that the number of accidents caused by an abnormal air pressure of a tire increases because a driver tends to neglect checking the air pressure of a tire though the driver must usually check the air pressure.
The present invention is made to solve the above problem and its object is to provide a monitor for the air pressure of a tire of a vehicle having a plurality of wheels such as four or six wheels, making it possible to easily check the air pressure of a tire.
DISCLOSURE OF THE INVENTION
According to claim 1 of the present invention, the air pressure of a tire is detected by air pressure detection means provided at the wheel side and the detection result is transmitted together with an ID code by radio waves of the same frequency from a plurality of detection sections provided correspondingly to each wheel. The radio waves are received by detection result reception means of a monitoring section and the detection result by the air pressure detection means is obtained for each tire in accordance with the ID code. Therefore, because radio waves with frequencies different for each tire are not used, the structure of equipment is simplified and the air pressure of a tire can very easily be measured. Thus, a female driver can also easily measure the air pressure. Thereby, a driver can usually check the air pressure of a tire and the number of accidents caused by an abnormal air pressure of a tire can be decreased. Moreover, because only the air pressure detection means is provided at the wheel side and the detection result transmission means and the like are provided at the chassis side, it is possible to relatively easily set these means. Furthermore, because detection results are transferred by radio waves, troublesome wiring is unnecessary for setting.
Furthermore, when a plurality of tires are used, because a detection result of the air pressure of a tire is transmitted together with an ID code different for each tire, it is possible to recognize the detection result for each tire even if detection results of these tires are transmitted at random by the detection result transmission means. Furthermore, because the detection result transmission means is provided not at the wheel side but at the chassis side, it is only necessary to set the air pressure detection means in a wheel when changing wheels but it is unnecessary to change ID codes or change locations of a transmission section.
According to claim 2, the air pressure of a tire is detected by air pressure detection means provided at the wheel side, the detection result is held for a predetermined time by storage means of a plurality of detection sections provided correspondingly to each wheel and thereafter, transmitted from each detection section by radio waves of the same frequency together with an ID code. The radio waves are received by detection result reception means of a monitoring section and the detection result by the air pressure detection means is obtained for each tire in accordance with the ID code. Therefore, because radio waves of frequencies different for e
REFERENCES:
patent: 5463374 (1995-10-01), Mendez et al.
patent: 5602524 (1997-02-01), Mock et al.
patent: 5604482 (1997-02-01), Majeed et al.
Shah Kamini
The Yokohama Rubber Co. Ltd.
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