Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Patent
1990-01-29
1992-01-14
Ng, Jin F.
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
340438, 340459, B60R 2510
Patent
active
050814435
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device for protecting the systems and the cargo of motor vehicles with automatic monitoring of operating conditions. Information supplied by sensors is electronically processed and used to influence a consequence control unit. The sensors are in the form of spheres which are freely movable in the tires of the motor vehicle and are provided with radio interfaces for reporting the measured values to the motor vehicle or to a central control station.
Functional disturbances in the operation of the engine, brakes and other systems of motor vehicles must be quickly recognized and eliminated. If this does not occur, expensive repairs become necessary or systems become unusable and must be replaced, especially for motor vehicles with relatively large systems.
There have been various proposals for recording or indicating functional disturbances in motor vehicles and various warning devices have been proposed (West German Offenlegungsschrift No. 35 10 321, West German Offenlegungsschrift No. 35 16 802 and European Patent Application No. 0 005 436). While all known devices make it possible to detect faulty conditions in a motor vehicle, they leave it to the driver to take the appropriate steps for elimination of a faulty condition. In many cases, this is not done and eventually causes the engine, brakes, cooling system, etc., to be ruined.
A method and an apparatus for radio measurement of the pressure in a tire is known from the West German Offenlegungsschrift No. 2 610 621. Sensors in the form of spheres are freely movable in the tires of the motor vehicle and are provided with radio interfaces to report the measured values to the motor vehicle or a central control station. Only one measured value (tire pressure) can be obtained and the expense for this is relatively great.
A further problem is the protection and monitoring of the cargo of motor vehicles, particularly trucks. The primary concerns are protection against theft and cargo monitoring with the latter being a consideration especially in transport vehicles for chemicals, series of tanks, etc., where traffic safety is of particular importance.
SUMMARY OF THE INVENTION
It is an object of the invention to effectively monitor and protect essential systems, as well as the cargo, of motor vehicles by determining, in combination, tire pressure, temperature in the tires and movement.
According to the invention, this object is achieved in that the spherical sensors have an outer jacket in which an inner sphere is rotatably mounted via rollers. A pressure-temperature measuring foil is applied to the outer surface of the outer jacket and the inner side of the outer jacket is provided with an electrically conductive layer which is in contact with the pressure-temperature measuring foil. The inner sphere has a counterweight, and a signal processing component with associated coils, as well as associated magnetic bodies which are distributed over the periphery of the outer jacket, is provided for radio transmission of measured values of tire pressure, temperature and self-movement.
In accordance with one embodiment of the invention, the measured values transmitted by radio are used to activate a records control unit, a breaker control unit for starting and emergency cutoff, an indicator control unit and an alarm system control unit.
Another embodiment of the invention resides in that the weight of the cargo in the motor vehicle can be indirectly checked and a consequence control unit indirectly regulated by means of the tire pressure.
The invention has the additional feature that the function of the brakes can be indirectly checked and a consequence control unit indirectly influenced by means of the tire temperature.
Also in accordance with the invention, a security system against vehicle theft can be regulated via movement of the spherical sensor.
The advantages achieved with the invention are particularly a substantial reduction in operating costs through consequential, regulated system protection, an increase
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.mu.P and .mu.C-based control systems cut engine pollution, up mileage, Electronic Design, vol. 26, Jul. 1978.
Hans D. Fournell and Rudiger Muller, "Bordcomputer fur Kraftfahrzeuege", Elektronik vol. 16, pp. 31-36 (1979).
"Automobilelektronik: Fluch Oder Segen?", Krafthand, vol. 3, pp. 82-86 (Feb. 1, 1986).
Kontler Peter K.
Ng Jin F.
Swarthout Brent A.
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