RU121614U1 - DEVICE FOR READING AND EMULATING ELECTRONIC KEY CODES - Google Patents

Abstract

A device for reading and emulating electronic key codes, including a microprocessor module containing a microcontroller, an indicator, a button-type control panel and a galvanic power source, as well as a contact device connected to a microprocessor module, characterized in that it contains a contact pocket made visually identical to the contact device containing a miniature radio transmitting device with a transmitting antenna, as well as fastening means and a contact group for connection to a contact device, the microprocessor module contains a miniature radio signal receiver with a receiving antenna, configured to receive a signal from a contact pocket radio transmitter.

Description

The utility model relates to the field of radio engineering and electronics and can be used for remote reading of electronic key codes in order to control attempts of unauthorized access to rooms and various devices equipped with access restriction systems with electronic keys such as Touch Memory of various manufacturers, as well as in force majeure situations, such like fire, natural disaster, terrorist act, as a duplicate of the many electronic keys used in the evacuation of material prices or, if necessary, urgent operational access to premises controlled by access restriction systems corresponding to these keys.

An intercom key emulator is known from the prior art, consisting of a microprocessor module containing a microcontroller, and a contact device and galvanic power cells connected to it. During programming, the code of an electronic key of the type DALLAS Touch Memory from the microcontroller is entered on the contact area of this key. When connecting the emulator to the contact door of the intercom, the emulator organizes the exchange with the latter according to the protocol and the transfer of the electronic key code recorded in the memory of the microcontroller at the programming stage. Thus, the emulator serves as a duplicate of the original electronic key, the code from the contact pad of which was recorded in the memory of the microcontroller (Dolin S. Key from all doors // Hacker, 2006, No. 9, p.20-22.).

The disadvantage of the described emulator is the inability to work with electronic keys of other manufacturers, the inability to quickly read the key code through direct contact with it, the inability to store the codes of several keys, although the characteristics of the microcontroller allow this, and finally, the complete absence of indication of both the emulated key code and emulator operation modes.

Also known is a digital emulator of electronic keys for intercoms "Digital", consisting of a microprocessor module containing a microcontroller, an indicator, a button-type control panel and a galvanic power source, and a contact device connected to it. Moreover, as a microprocessor module with a power source and an indication, a cell phone or a portable communicator can be used. Through a contact device, an electronic key manufactured by Tsifral can be connected to a reader-emulator, after which its code is read in software and hardware in the memory of the microprocessor module, displayed on the indicator, and can be saved for further emulation. When connecting the contact device of the reader-emulator to the contact box of the intercom, the reader-emulator transmits, according to the prescribed protocol, one of the electronic key codes stored in the memory of the microprocessor module, the number of which is selected on the indicator by the control buttons. Thus, the reader-emulator performs the function of a duplicate of several copies of the original electronic keys, the codes of which were directly read earlier into the memory of the microprocessor module. (Semenov A.A. Durim intercom, or "The key to all doors-2" // Hacker, 2007, No. 8, p. 26-29.)

The disadvantages of the described reader-emulator include the inability to work with electronic keys of other manufacturers, the inability to read the codes of emulated keys remotely.

The closest in technical essence to the claimed utility model is a universal key for the intercom, adopted as a prototype. The universal key consists of a microprocessor module containing a microcontroller, an indicator, control buttons and a galvanic power source, and a contact device connected to it. When connecting an electronic key to a universal key contact device, the latter determines the type of connected key in hardware and software and reads the key code into memory, giving its number to the indicator. When connecting the contact device of the reader-emulator to the contact box of the intercom, the reader-emulator transmits, according to the prescribed protocol, one of the electronic key codes stored in the microprocessor module memory, the number of which is selected on the indicator by the control buttons. Thus, the reader-emulator serves as a duplicate of several copies of the original electronic keys, the codes of which were directly read previously into the memory of the microprocessor module (Universal key for intercom // http://samodelkyn.ucoz.ru/index/ universalnyj kljuch dija domofona / 0 -132).

The disadvantage of the prototype, as well as the above close analogues, is the inability to read the codes of emulated keys remotely.

The objective of the utility model is to create a device that can remotely read electronic key codes without direct physical access to the keys themselves in order to control attempts of unauthorized access to rooms and various devices equipped with access restriction systems based on systems with electronic keys such as Touch Memory from various manufacturers.

The technical result is to expand the functionality.

The specified technical result is achieved in that the device for reading and emulating electronic key codes, including a microprocessor module containing a microcontroller, an indicator, a button-type control panel and a galvanic power source, as well as a contact device connected to the microprocessor module, according to the solution, contains a contact hole, made visually identical to the contact device, containing a miniature radio transmitting device with a transmitting antenna, as well as mounting means and ontaktnuyu group for connection to the contact device, microprocessor module includes a miniature radio receiver with a receiving antenna configured to receive a signal from a radio transmission apparatus contact the pockets.

An additional contact pocket is made visually identical to the contact pockets of access restriction systems, similar to those installed in doorphones of the “Digital”, “Visit”, “Metakom” type, etc. Moreover, in the additional contact pocket there is a miniature radio transmitter with a transmitting antenna and a contact group for connecting an access restriction system to the pocket, as well as a fastening means. The microprocessor module also introduces a miniature radio signal receiver with a receiving antenna, capable of receiving and demodulating an encoded radio range signal from an additional contact pocket with a radio transmitting device. Thus, remote communication via the radio channel of the device for reading and emulating electronic keys and an additional contact pocket, mounted on top of the pocket of the access restriction system, is carried out, and the signal at the output of the radio receiver introduced into the microprocessor module is decoded by the microcontroller programmatically and can be stored in the device’s memory for the purpose subsequent emulation of the key code through the existing contact device.

The claimed technical solution differs from the prototype in the presence of new units: an additional contact pocket with a miniature radio transmitting device and a transmitting antenna, a contact group and mounting means, a miniature radio signal receiver with a receiving antenna, their connections with each other and with other elements of the device for reading and emulating electronic key codes . These differences allow us to conclude that the proposed solution meets the criterion of "novelty."

The invention is illustrated by drawings and photographs, which are illustrative materials for the claimed technical solution:

figure 1 presents the structural diagram of a device for reading and emulating codes of electronic keys;

figure 2 shows the appearance of a typical electronic key;

figure 3 shows the appearance of the standard contact pocket of the access restriction system;

figure 4 shows a schematic diagram of the interface part of single-wire access control systems;

figure 5 presents the structural diagram of the connection of the inventive device for reading and emulating codes of electronic keys with access control system in the reading mode of the electronic key code;

figure 6 shows the appearance of the additional contact pocket of the device for reading and emulating codes of electronic keys;

Fig.7 shows a structural diagram of the connection of the inventive device for reading and emulating codes of electronic keys with an access restriction system in the emulation mode of an electronic key code;

on Fig shows the appearance of the contact device.

The drawing (figure 1) shows a structural diagram of a device for reading and emulating electronic key codes, which includes a microprocessor module 1, which contains a microcontroller 2, a miniature radio signal receiver 3 with a receiving antenna 4, indicator 5, a button-type control panel 6 , galvanic power source 7. The contact device 8 is electrically connected to the microprocessor module 1, and an additional contact hole 9, comprising a radio transmitting device 10 with a transmitting antenna 11 and a contact group 12, communicates with a miniature radio signal receiver 3 of the microprocessor module 1 through a receiving antenna 4 via radio channel 13.

At the same time, the miniature radio signal receiver 3 in the microprocessor module 1 is connected with its output to one of the ports of the microcontroller 2, to which an indicator 5, a button-type control panel 6 are connected via input / output ports. The galvanic power supply 7 is connected to the microcontroller 2 and the miniature radio signal receiver 3 by supplying them with direct current.

To understand the principle of operation of the inventive device, we will provide a brief description of the process of operation of the original access restriction system in contact with a typical Touch Memory electronic key.

A key of this type, the appearance of which is shown in FIG. 2, is a microelectronic device without internal power supply that is made by the methods of integrated technology, which contains in its read-only memory (ROM) a unique serial number recorded by one method or another at the manufacturer and not subject to change.

To read the code of such a key, a single-wire bus is used, through which the key is also powered during data exchange. Data exchange is carried out according to a special protocol that uses a single-wire bus for two-way data exchange, and the communication protocols of different manufacturers are not compatible.

Information is read from the key memory by touching the reader with a contact pocket (Fig. 3). The reading process includes initializing the device and identifying information from the ROM. The exchange rate is sufficient to ensure data transfer at the moment of contacting the contact device. In the exchange procedure, the electronic key is usually a slave device, and the master (master) is a microprocessor built into the reader unit.

Figure 4 shows a schematic diagram of the interface part of single-wire access control systems, consisting of a master device and the key itself, connected to it through a contact hole.

When the key touches the contact hole, the charge occurs, which is built into the capacitor key C through the diode VD and the resistor R with a value of 5K from the power source of the reader V _dd . The voltage at the capacitor C is the supply for the electronic circuitry of the switch, and during the exchange of information with the master, the capacitor C is periodically recharged at a positive potential at the input. After supplying power, the data exchange process is initialized according to the provided protocol, and the key is transmitted with the key stored in its memory code, upon successful completion of which the master device takes some executive action (opening the door lock, allowing access to the computer, etc.) if the code transmitted by the key matches one of the codes stored in the memory of the master device.

The inventive device for reading and emulating electronic key codes in the light of the foregoing works as follows.

The presented drawing (Fig. 5) additionally shows the master device of the access restriction system 14 with a standard contact lock 15 and an electronic key 16. The drawing illustrates the remote reading of the user key code 16 of the claimed device. For this, an additional contact pocket 9, which includes a radio transmitter 10 with a transmitting antenna 11 with its contact group 12, is connected to the standard contact pocket 15 of the master device of the access restriction system 14, located on top of the standard contact pocket 15 and hiding it visually. The appearance of the additional contact pocket 9 is shown in FIG. 6, from which it can be seen that the installation of the additional contact pocket 9 on the master device of the access restriction system 14 is practically invisible to the user of the system. The radio transmitting device 10, which is part of the additional contact hole 9, through the contact group 12 receives power from the master device of the access restriction system 14, while the additional contact hole 9 completely duplicates the functions of the regular contact hole 15 hidden by it. When the user connects to the additional contact hole 9 of the electronic key 16, the key code is supplied to the contacts of the standard contact pocket 15 through the contact group 12 and the master device of the access restriction system 14 carries out the exchange process for data according to the designated protocol, and receiving an electronic key code 16 stored in its storage device. When this occurs, the radio signal modulation of the additional contact hole 9 of the radio transmitting device 10 with an electric signal containing information about the electronic key code 16. The radio signal modulated by the electric signal containing information about the electronic key code 16 through the transmitting antenna 11, radio channel 13 and the receiving antenna 4 is fed to the input of a miniature radio signal receiver 3, which is part of the microprocessor module 1. In this case, the metal ring-shaped housing of the additional circuit pit hole 9 (Fig.6) acts as a transmitting antenna 11 of the frame type. The radio signal receiver 3 performs demodulation of the radio signal, extracting from the radio signal an electric signal containing information about the code of the electronic key 16, after which this signal is fed to the input of the microcontroller 2. The microcontroller 2 decodes the code of the electronic key 16 from the received electric signal and displays its value on the indicator 5 then, at the command of the button type 6 control panel, the code can be stored in the memory of microcontroller 2, or the command can be received from the button type 6 control panel code saving code. A galvanic power source 7, connected to the microcontroller 2 and a miniature radio signal receiver 3, provides them with direct current.

Thus, the claimed device implements the ability to remotely read the codes of electronic keys without direct physical access to the keys themselves.

If it is necessary to emulate an electronic key code 16 for access to the access restriction system, the claimed device is connected to the master device of the access restriction system 14 through the contacts of the standard contact pocket 15 and its own contact device 8 connected to the microcontroller 2 of the microprocessor module 1, as shown in Fig. 7 . The external view of the contact device 8 mounted on the housing of the microprocessor module 1 is illustrated in FIG.

The necessary code is selected from the memory of the microcontroller by 2 commands of the button type 6 control panel connected to it and displayed on indicator 5, after which a command to emulate the key code is received from the button type control panel 6. Having received this command from the button type 6 control panel, the microcontroller 2, through its own contact device 8 and the contacts of the standard contact pocket 15 of the master device of the access restriction system 14, initiates the data exchange process according to the designated protocol and the transmission of the key code stored in its memory. Upon successful completion of the code transfer procedure, the master device takes executive action (opening the door lock, allowing access to the computer, etc.) if the code transmitted by microcontroller 2 matches one of the codes stored in the memory of the master device.

Thus, the claimed device duplicates the code of the electronic key 16 for the access restriction system in the absence of the electronic key itself.

Thus, due to the presence of newly introduced blocks, the proposed device for reading and emulating electronic key codes in comparison with the prototype allows not only emulating electronic key codes, but also reading their codes remotely without direct physical access to the keys themselves, which can be used both to control attempts of unauthorized access to rooms and various devices equipped with access restriction systems with such electronic keys, and when necessity urgent surgical access in the case of force majeure at the premises controlled access systems corresponding to these keys.

Claims (1)

A device for reading and emulating electronic key codes, including a microprocessor module containing a microcontroller, an indicator, a button-type control panel and a galvanic power source, as well as a contact device connected to a microprocessor module, characterized in that it contains a contact hole made visually identical to the contact device containing a miniature radio transmitting device with a transmitting antenna, as well as mounting means and a contact group for connecting to the contact In construction, the microprocessor module comprises a miniature radio signal receiver with a receiving antenna, configured to receive a signal from a contact pocket radio transmitting device.