RU2475860C1 - Noncontact high-security electronic code unlocking device - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: device has a low-power radio frequency transmitter with high-frequency signal code pulse modulation in form of an electronic key which consists of an encryptor, a modulator, a driving generator, an antenna and a modulation control button; a receiving device which consists of an antenna in form of a spiral, a receiver, a decoder and an integrating circuit for controlled series-connected trinistors; an input device as part of a hermetic contact and a solenoid, placed together with the antenna of the receiving device on a chassis made from nonmagnetic material; a self-charging battery; the antenna of the electronic key is in form of a brass tube which ends with a magnetic rod of the same diameter as the tube inside which the hermetic contact is fitted; the outer diameter of the antenna of the electronic key and the inner diameter of the input hole in the chassis of the input device are of comparable size; the input device is enclosed in a metal shield.

EFFECT: more secure and reliable unlocking of any secure technical objects having an actuating locking mechanism in their composition.

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Description

The device relates to electronic protective equipment and can be used in the design of security systems of high security.

There are various automobile security anti-theft systems of domestic and foreign production, electronic and mechanical, characterized by various schemes and how to connect them to the elements of a car (Andrianov V.I., Sokolov A.V. Automobile security systems. Reference manual. - St. Petersburg: Arlit, 2000), as well as security systems of domestic manufacturers PANTERA, TOMAHAWK, SOBR, STARLINE, SCHERKHAN, BLACK BUG, DRAGAN and others, as well as security systems, in particular, Magic Systems (St. Petersburg) - car control systems CAR-Online and Car Mobile, with which is to be mounted on a car alarm, GSM-pager and ensuring determine the current location of the vehicle using a computer connected to the Internet, or cell phone equipped with support for Java-based applications, and Bluetooth standard. In addition, for example, the Car Mobile system provides the ability to remotely transmit commands for car alarms using a computer connected to the Internet or a cell phone, in particular for starting or blocking the engine, as well as installing a camera in the car. This system can be used both for remote control of car alarms, and for monitoring a vehicle.

All these systems, including the remote control of a wearable keyfob, operating on infrared radiation, require direct line of sight. Later models of trinkets use the work of security systems on the radio frequency. They are structurally more complex, but do not require direct visibility of the protected object.

Trinkets are also used in security systems of residential buildings, warehouses, garages. Such key rings can have a keyboard on which the user must enter a PIN code to gain access to the object.

Also known is a non-contact relay code lock with a five-digit code (I.N. Sidorov. "Electronic code locks", St. Petersburg, "Polygon", 2000), installed on the doors of protected objects, containing a code device, an electrical part (block power supply, actuator actuating relays) and actuator.

However, all the considered security systems have low reliability due to the presence of the following disadvantages:

1. Easy access to the control part of the code lock located on the outside of the guarded object (on a key fob, cell phone), and the ability to intercept the signal by extraneous technical means at the time of its submission to the guarded object.

2. The constant presence of the security system in the on mode.

In addition, such security systems have a significantly high cost of assembly and installation in the consumer segment “price - reliability”.

The objective of the invention is the creation of a contactless electronic code unlocking device of increased secrecy and reliability of unlocking (disconnection, undocking) of any protected technical objects that include an executive locking mechanism.

The objective is achieved in that the device contains a low-frequency radio transmitter with pulse code modulation of a high-frequency signal in the form of an electronic key, consisting of a series-connected encoder, modulator, master oscillator, antenna and modulation control buttons, and also contains a receiver device consisting of series-connected antennas in the form of a spiral, receiver, decoder and integrating chain of controlled series-connected trinistors, an input device, consisting of a rcon and a solenoid, placed together with the antenna of the receiving device, on a frame made of non-magnetic material, and a battery with automatic recharging, and the antenna of the electronic key is made in the form of a brass tube ending with a magnetic rod of the same diameter as the tube into the cavity of which the reed switch is embedded, the outer diameter of the antenna of the electronic key and the inner diameter of the inlet in the frame of the input device are comparable, and the input device is enclosed in a metal screen.

Figure 1 presents a block diagram of a contactless code electronic unlocking device of high security; figure 2 - "passive mode" of the device (structural layout of the elements of the device before bringing it into "active mode"); figure 3 - "standby" of the device (structural layout of the elements of the device, ready to work in "active mode").

The directions of the main functional processes in the device are indicated by arrows. Functional elements of the device are indicated:

1 - encoder,

2 - modulator

3 - master oscillator,

4 - antenna electronic key

5 - magnetic rod

6 - reed switch,

7 - power source,

8 - receiver

9 - decoder,

10 is an integrating chain of controlled series-connected trinistors,

11 - antenna in the form of a spiral,

12 - reed switch

13 - solenoid,

14 - battery with automatic recharging,

15 - executive locking mechanism,

16 - brass tube

17 - frame

18 - inlet of the frame,

19 - control button,

20 - electronic key housing,

21 is the screen.

The device contains (see Fig. 1, 2) an electronic key that includes a series-connected encoder 1, a modulator 2, a master oscillator 3, an antenna 4, a magnetic rod 5, a reed switch 6, a power source 7; a receiving device including a series-connected receiver 8, a decoder 9, an integrating chain of controlled series-connected trinistors 10 and an antenna 11; an input device, which includes a reed switch 12 and a solenoid 13; battery with automatic recharging 14; an actuating locking mechanism 15. In this case, the antenna 4 (see FIG. 2) is made in the form of a brass tube 16 ending with a magnetic rod 5, in the cavity of which a reed switch 6 is integrated. The antenna in the form of a spiral 11, as well as a reed switch 12 and a solenoid 13 are structurally placed on the frame 17 of the input device.

All the main regular units of the proposed device are made in a standard configuration using modern domestic radio and electronic products.

The device operates as follows.

To unlock (disconnect, undock) any technical objects, i.e. to bring the device into "active mode" (see figure 2 and 3), you must insert the antenna 4 into the inlet 18 of the input device; the reed switch 6 will be installed at the same level with the solenoid 13, and the magnetic rod 5 will be at the same level with the reed switch 12. Under the influence of the magnetic field of the magnetic rod 5, the contacts of the reed switch 12 will be closed, which will turn on the power source 14 and supply voltage to the receiver 8 , a decoder 9, integrating a chain of trinistors 10 and a solenoid 13, which will turn on the reed switch 6 with its magnetic field, which in turn will turn on the power source 7 and supply voltage to the encoder 1, modulator 2 and the master oscillator 4. The device will accept “Standby mode” and will be ready to work in “active mode”.

After dialing the encoded radio signal on the encoder 1 using the buttons 19 located on the housing 20 of the electronic key, the converted high-frequency component after the modulator 2 and the master oscillator 3 will go to the transmitting antenna 4.

The signal received by receiver 8 will go to a decoder 9, and then to an integrating chain of trinistors 10, whose operation is designed for a sequential and strictly defined order of pressing buttons (authorized set of encoded radio signal - PIN code) for actuating the actuating lock mechanism 15; however, the number of possible encoding combinations when attempting unauthorized dialing is several thousand.

The insignificant length of the antenna 4, its location during the interaction of the electronic key with the input device in close proximity to the antenna 11, as well as the use in the design of the input device as shielding elements: the frame 17 of the input device made of non-magnetic material, a metal screen 21, worn on the input device, provide the screening of the high-frequency radio signal and prevent its radiation outside the input device of the protected object, which excludes it is detected and fixing by extraneous technical means.

A high degree of secrecy and reliability of the device compared to the systems considered above is achieved due to the following factors:

1. The device has an individual layout and installation scheme for different objects, while the input device can be installed both within the protected object and outside it in an arbitrary place.

2. The radio signal of the transmitter is noise-immune to all types of electronic influences, it is protected from external scanning and suppression, does not extend beyond the boundaries of the protected object due to the fact that it has low power and is structurally shielded.

3. Unlocking of the object can be carried out only by combining the antenna of the electronic key with the inlet of the input device and the authorized set of the encoded radio signal (PIN code) with the modulation control buttons. Even in “standby mode”, i.e. when the power is supplied, but until the PIN code is entered with the modulation control buttons, the system will not work.

4. Before unlocking the object, ie Before the electronic key antenna interacts with the input device, the entire system is de-energized.

5. There is no typical algorithm for the operation of the device, due to the fact that the decoder of the receiving device is connected to an integrating chain of controlled trinistors, the operation of which is designed for a sequential and strictly defined order of pressing buttons for actuating the actuator.

6. The system is operational in the most inaccessible places, such as tunnels, underground parking, reinforced concrete shelters, etc. All of the above factors protect the system from various kinds of unauthorized, malicious and other interventions, as well as in cases of force majeure.

Comparison of the claimed non-contact code electronic unlocking device of increased secrecy with the above technical solutions in this field shows that it meets the criterion of "novelty."

A model of a contactless code electronic unlocking device of increased secrecy was manufactured and tested. Tests gave a positive result.

Claims (1)

A non-contact code electronic unlocking device of increased secrecy, characterized in that it contains a low-frequency RF transmitter with a pulse code modulation of a high-frequency signal in the form of an electronic key, consisting of an encoder, modulator, master oscillator, antenna and modulation control buttons connected in series, and also contains a receiving device consisting of series-connected antennas in the form of a spiral, receiver, decoder and integrating chain controlled connected trinistors, an input device consisting of a reed switch and a solenoid placed together with the antenna of the receiving device on a frame made of non-magnetic material, and a battery with automatic recharging, the antenna of the electronic key being made in the form of a brass tube ending with a magnetic rod of the same diameter as the tube , in the cavity of which a reed switch is integrated, while the outer diameter of the antenna of the electronic key and the inner diameter of the inlet in the frame of the input device are comparable, and the input device The property is enclosed in a metal screen.

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