Antitheft system integrated with functions of security, informat

Details Antitheft system integrated with functions of security, informat Antitheft system integrated with functions of security, informat

1995-02-13

1998-09-08

Mullen, Thomas

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

340428, 340430, 307 102, 180287, 379 44, 379 51, 379 59, 342357, 342457, B60R 2510

Patent

active

058050558

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention is related to the technical field concerning automatic supervision and security devices, that can be attached to transport means in general and to motor vehicles in particular.
More precisely, the present invention is concerned with a motor vehicle antitheft system integrated with functions of security, localization and navigation of the same motor vehicle.


BACKGROUND ART

Nowadays, there are many types of antitheft systems for motor vehicles, but generally they can be subdivided in two categories: the antitheft systems acting in a limited range and the antitheft systems acting in a wider range.
The first group includes antitheft systems which signal automatically tampering or anomalous use of the motor vehicle in a limited environment surrounding the same motor vehicle.
In other words, these antitheft systems, attached to motor vehicles, signal either acoustically or visually fraudulent use of motor vehicles by persons considered "unauthorized", because they have not deactivated the same antitheft system.
The main disadvantage of this type of antitheft systems results just from their peculiar characteristic, i.e. their limited range of action, of dozens or hundreds meters, either for signalling the tampering into the vehicle or the activation or deactivation of the same antitheft system.
Another disadvantage of this type of antitheft systems is that, in order to function, they must be first activated by an "authorized" person.
The other group of antitheft system comprises the antitheft system for motor vehicle that signal "unauthorised" tampering of the motor vehicle up to a distance of some kilometers from the same motor vehicle.
Such antitheft system are provided with a transmitter-receiver unit on radio frequency that can produce and transmit an alarm signal that can be received and recognized by an operative station, on the same radio frequency and designed to distant monitoring of possible thefts of the load stored in the motor vehicle or its part, or theft of the same motor vehicle.
Such alarm signal is transmitted by the antitheft system set up on the vehicle only if preestablished conditions for recognizing the theft occur.
The most common conditions that activate the antitheft system for motor vehicle are first of all subjected to the previous voluntary activation by the motor vehicle driver's by means of a special key either mechanical or electronic (remote control key, magnetic card, and the like).
Most often the antitheft system is activated when one of the motor vehicle doors is opened or when the same motor vehicle is started.
The biggest disadvantage of this type of antitheft system derives from its limited some kilometer dozens action range, therefore the motor vehicle can be monitored only in the city area or anyway, in a limited zone of national territory.
Further disadvantage of this type of antitheft system results from the necessity to prepare a stationary check room that is able to talk to the mobile unit of the antitheft system installed on the motor vehicle.
The management cost of such a stationary check room is high what, added to the initial cost and the management cost of this type of antitheft system, makes it extremely expensive.
Another disadvantage of "zone" covering antitheft systems of this type derives from the fact that they can be easily dodged, since the "authorized" person could be forced by an ill-intentioned person to deactivate the antitheft system by inserting the proper mechanical or electronic key.
Still further inconvenience of both the above presented types of antitheft system lies in activation and deactivation of the antitheft system.
In fact, such an action must be always performed by a person authorized to use the motor vehicle who, moreover, must be always very near the same or, at most, some kilometers from the motor vehicle, for limited range antitheft systems and those wider range antitheft systems, respectively.


DISCLOSURE OF THE INVENTION

The main scope of the present invention is to provide an antitheft sy

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