RU1822826C - Antitheft device - Google Patents

Abstract

Usage: electrical equipment of cars. SUMMARY OF THE INVENTION: a threshold speed sensor and an auxiliary chopper with paraphase outputs are introduced into the anti-theft device containing a theft sensor, an And element and standard turn signal lamps. In this case, the And element is triggered only if there are signals from two sensors, i.e. while driving a stolen car. Auxiliary breaker provides alternate lighting of direction indicator lamps, not visible to the hijacker. 2 s.p. 3-ill.

Description

The invention relates to the electrical equipment of automobiles and can be used as an anti-theft tool.

The aim of the invention is to provide an anti-theft device characterized by low immunity.

In FIG. 1 shows a diagram of the main version of the proposed anti-theft device.

The device comprises a theft sensor 1, a threshold speed sensor 2. The outputs of the sensors 1 and 2 are connected to the inputs of the And 3 element, the output of the And 3 element is connected to an additional breaker of the direction indicators 4. The chopper 4 has paraphase outputs 5 and 6, connected to the standard lamps 7-10 of the direction indicators of cars. Lamps 7-10 are also connected to the standard breaker 11 indicators

Figure 2 shows a second variant of the circuit of the described anti-theft device.

It differs from the first in that an electromagnetic relay 12 is inserted into it, the opening contacts 13 and 14 of which are included in the open circuit between the lamps of the front direction indicators 7 and 8 and the standard breaker of the direction indicators 11, and lamp equivalents (resistors) are connected to the closed relay contacts 15 and 16. The lamps of the rear direction indicators 9 and 10 can also be connected to the lamps of the front indicators 7 and 8, and not to the chopper 11.

In Fig. 3 shows a third variant of the circuit of the proposed device.

It differs from the second in that the make contacts 13 and 14 of the contact groups are interconnected and equivalents are excluded.

The device according to the circuit of FIG. 1 works as follows.

In case of theft, theft sensor 1 generates a signal to the And 3 element. After the car develops a certain speed, for example 20-30 km / h, the threshold speed sensor 2 will work, which also gives out

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the signal to the element And 3. At the output of the element And 3, there is a signal that turns on the additional breaker of the turn signal 4. The additional breaker 4 alternately 1-2 Hz turns on the lamps of the right direction indicators 7 and 9 and the left indicators 8 and 10. Alternately the inclusion of right and left signs signals to the police and the traffic police that this car was stolen.

A threshold sensor at speed 2 is necessary so that the hijacker does not detect the presence of an anti-theft device immediately after B enters the vehicle at a stand before driving. The direction indicators are not visible from the passenger compartment, therefore, in the movement, the hijacker does not see the flashing of direction indicators either.

The device according to the scheme of FIG. 1 has a drawback - modern cars have a warning lamp indicating the serviceability of the direction indicator lamps.

When the anti-theft device works, this lamp will not work correctly, which can be noticed by the hijacker.

In the device according to the scheme of figure 2, this disadvantage is eliminated.

When the anti-theft device is activated, the electromagnetic relay 12 is turned on and, with its contacts 13 and 14, disconnects the front indicator lamps 7 and 8 from the turn signal switch 11 of the turn indicators. The rear direction indicators 9 and 10, as well as the side direction indicators, if any, remain connected to the standard to the interrupter 11. For normal operation of the test lamp, equivalent to 15 and 16 are connected to the standard interrupter 11 instead of bulbs 7 and 8. If none of the direction indicator lamps are visible from the saloon, it is possible to turn off all lamps from the standard turn indicator 11 and replacing them with the equivalents of lamps 15 and 16, and in this case, one common equivalent for the right and left sides can be used by connecting the closing contacts 13 and 14 of the contact groups.

In the device of Fig. 3, the rear direction indicator lamp of the other side of the vehicle is used as the load equivalent, but this option cannot be used on those vehicles where the direction indicator lamps are visible from the passenger compartment.

As the hijacking sensor 1, any known anti-theft device, for example an analog or a prototype, can be used. If the hijack sensor is used in conjunction with an audible alarm, it must be supplemented with a trigger that remembers the hijacking after the hijacker has turned off the signal, this trigger can be executed on a CMOS chip or on a polarized relay so that it does not reset when it is turned off.

In the simplest case, a flush switch can be used as a theft detector, which is switched by the driver before exiting the vehicle.

As a threshold speed sensor 2, a coil may be used mounted adjacent to the rotating magnet of the vehicle speedometer. A diode rectifier, a capacitor and a threshold element must be connected to the coil.

As an additional breaker of the turn signal 4, a symmetrical multivibrator can be used, the shoulders of which include windings of electromagnetic relays or power switches on transistors. When powering such a multivibrator, it will alternately turn on these relays or switches.

Thus, in the case of theft of a car equipped with this device, the alternate inclusion of right and left signals of direction indicators will attract the attention of traffic police or police. Turning on the anti-theft device is not detectable for the hijacker, therefore, the hijacker will not take measures to turn it off, which reduces the vulnerability of the device.

The device will be particularly effective as an accessory to the device with an audible alarm. After turning it off, it will be difficult for the hijacker to assume that there is any other anti-theft device, especially since it is not detectable to them.

Claims (3)

1. A device for signaling a car theft, comprising a theft sensor, the output of which is connected to the first input of an And element, a standard turn signal lamp, characterized in that a threshold speed sensor and an auxiliary chopper with paraphase outputs are inserted into it, and the output of the threshold speed sensor is connected to the second input of the element And, the output of the element And to the input of the auxiliary breaker, and the outputs of the latter to the lamps of the corresponding direction indicators. 2. Device pop. 1, characterized in that the relay coil is connected to the output of the And element, while the outputs of the standard breaker are connected through the disconnecting contacts of the relay to the lamps of all or part direction indicators, and through make contacts with resistive lamp equivalents. 3. Device pop. 1. Distinguishing relay coil, with a breaker connecting relay contacts with direction indicator lamps, and so that 5 contacts are connected to the output of the And element - between each other. relay coil, while the outputs of the standard breaker are connected through the disconnecting contacts of the relay with lamps of all or part of the direction indicators, and through the closing  contacts - among themselves. VI-H. U 3 FIG. g -HgrM 1-00 with 0