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Security/prevention system with related device
| Details |
Inventors: Stern, Ivan;
Assignee:
Primary Examiner: Hofsass; Jeffery
Assistant Examiner: Pope; Daryl C.
Attorney, Agent or Firm: Abelman, Frayne & Schwab
The base of a security/prevention system is an electronic device which has the capability of joining the performance of two functions, i.e. prevention of road accidents and theft protection of vehicles, using the principle of joint use of frequencies, whereby interference with the device's operation is prevented. The invention allows, on the one hand, such application in road traffic prevention in which an electronic security device installed in a vehicle provides passive or active warning of participants in the traffic as to possible momentary dangers requiring quick reaction of the driver. On the other hand, the invention allows such application in road traffic safety in which an electronic security device protects vehicles against theft; the device comprises three base units, i.e. an electronic security device, which is installed in the vehicle and intended for transmitting messages about theft, a pocket receiver, and a network of receiver devices distributed at all locations of importance to the reception of the transmitted messages. |
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DETAILED DESCRIPTION The device according to the invention allows the transmission of RF signals which identify the actual state of a vehicle (e.
g.
sudden braking or acceleration, sudden stop as a result of crash, and similar), and the reception of signals containing important information on the actual state of other vehicles taking part in the traffic (e.
g.
accident, sudden braking, unexpected barriers).
In this way, the device provides active or passive warning of participants in the traffic about direct hazards, giving the drivers more time for perception or reaction (prevents collisions or chain crashes on unsurveyable road sections or in bad weather conditions, clashes against broken down vehicles or unmarked vehicles .
.
.
).
The device and/or system can also be used for calling attention to vehicles on an urgent ride.
The latter should have their device equipped with additional software allowing manual switching of signalling in case of an urgent ride.
Similarly, the device can be used by road maintenance vehicles or slow vehicles, or by trains, which can use this device for signalling at unprotected level crossings.
Also the sites of works on the road can be equipped with the device for better safety.
A higher version of the device can also be used for automatic switching on and off the lights in tunnels or in bad weather conditions, or at poor visibility, for signalling at incorrect positioning of drivers on motorways.
Tests on the nature of RF signals have shown that the recommendable frequencies are between 400 and 500 MHz, although frequencies in the megahertz range may also be used if necessary.
At these frequencies, covering of "shadows" or propagation around corners is almost ideal.
At low powers around 100 mW, the range of signals necessary for satisfactory operation of the device should be around 200 to 300 m, which is very suitable for application.
A longer range would cause saturation of signals, so that also drivers who are too far away to be in danger would be alerted
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