RU48087U1 - Biometric intercom - Google Patents

Abstract

Usage: to create electronic systems to prevent unauthorized access to places of common residence (intercoms) based on biometric identification of visitors. SUBSTANCE: biometric intercom contains an electrically connected reader, a controller with a microprocessor integrated in it, an actuator and a control object. The biometric intercom also contains a call unit connected via a call-commutation unit to a controller connected to the light indication unit and the sound notification system. The intercom reader is optoelectronic, the controller is supplemented with a video image processing unit and a dedicated digital channel connected to a relay-type actuator, which is a digital microcontroller. To configure the intercom, register new users and other operations, the biometric intercom can contain a data input device, which is a personal computer.

Description

The proposed utility model relates to techniques for protecting various objects from the penetration of unwanted unauthorized persons and can be used to create electronic systems to prevent unauthorized access to common areas (intercoms) based on biometric identification of visitors.

Identification using biometric technologies is currently one of the most promising, rapidly developing areas, among which methods and tools using fingerprints occupy one of the leading places. Biometric technologies are increasingly becoming leaders in the security industry, in the fight against crime and terrorism.

As analogues of modern intercoms, we consider some well-known schemes of electric locks.

A known electronic key (see USSR author's certificate No. 1082923, MKI E 05 B 47/00, publ. 30.03.84) containing a control unit, address counter, comparison unit, memory unit, counter, readout unit, connector, element "And ", Register, read decoder, block of elements" AND ", decoding block, reception register. The disadvantages of the known electronic key are: the complexity of the circuit due to the large number of discrete elements; the insecurity of the external circuits of the key from the effects of discharges of static electricity, due to the lack of circuit protection devices; low reliability of the electronic key due to the presence of mechanical switches.

A known electronic key (see RF patent No. 2245977, IPC 7 E 05 B 49/00, publ. 2005.02.10) containing a connector, a circuit protection unit, an interface unit, a control unit connected to a memory unit. Its circuit is simpler and more reliable; it provides protection of the external circuits of the key from the influence of discharges of static electricity.

A device for controlling an electronic lock (see RF patent No. 2209909, IPC 7 E 05 B 47/00, publ. 2003.08.10) is intended to protect various objects from unauthorized access. The device contains two shift registers, a multiplexer, a counter, a control unit, a code comparison unit, a memory unit, two input buses and two output buses. However, the known control device, as well as the analogues described above, has a significant drawback, which consists in the use of a large number of analog elements.

Known analogues of local control systems and access control to common areas (intercoms), built on digital elements:

- a multi-site audio doorphone with a code keyboard “Policy 42”, Russia, Saratov (see. Magazine “Catalog of Security Systems” No. 1 (11) - 2004, p. 158);

- Intercom company Metacom, Russia, Moscow (see ibid., p. 154).

On-door speakerphones are designed for installation in the entrances of residential buildings and are designed to connect up to 256 subscribers.

The intercoms described above are organized according to a scheme using an identifier (card or electronic key), a reader, or mechanical access devices (keys). On-door speakerphones also contain a negotiation system and a switching system for dialing subscribers. The main disadvantage of the above intercoms is the presence of an electronic key that can be lost, copied, transferred and

etc. The disadvantages include the combination of the actuator with the control system.

The closest in technical essence to the proposed utility model is the TsIFRAL SSD-2094M microprocessor-based multi-door intercom manufactured by Tsifral LTD, Russia (see the SKUD. Anti-terrorism - 2005 catalog, p. 59). The on-door speakerphone is intended for use in the entrances of apartment buildings, in offices and industrial buildings, to provide calls and communication between visitors and subscribers. The intercom consists of an electrically interconnected reader for digital contact keys Touch Memory, a switching unit with a microprocessor and a controller integrated in it, combined with a controller of an actuating device controlling a control object, that is, a lock, and also a call unit. In addition, the structure of the “DIGITAL SSD-2094M” intercom includes: a light indication unit and a sound notification system.

The intercom selected as a prototype has a number of advantages: compact dimensions, modern design, backlighting of the keyboard buttons, as well as the ability to install a video camera and the ability to open a door using a common code and individual subscriber codes. However, despite these advantages, the disadvantage of the known intercom is the presence of an electronic key (card), which can be copied, lost or damaged mechanically. The disadvantages of the intercom should also include the combination of the actuator with the controller (control system). A consequence of the above disadvantages is the low reliability of the system. In addition, a significant disadvantage of the prototype is that in case of loss of a digital contact key, it must be manufactured anew, which leads to material costs.

The objective of the utility model is to increase the reliability of protection of places of common residence by using individual biometric parameters determined by scanning a fingerprint, while expanding the circle of persons with authorized access at no additional cost.

To solve the tasks, a biometric intercom is proposed, which, like the one closest to it, selected as a prototype, contains an electrically connected reader, a controller with a microprocessor built into it, an actuator, and a control object. The biometric intercom also contains a call unit connected via a call-commutation unit to a controller connected to the light indication unit and the sound notification system. A feature of the proposed biometric intercom, which distinguishes it from the well-known intercom prototype, is that the reader is optoelectronic, the controller is supplemented by a video processing unit and a dedicated digital channel connected to an actuator of relay type, which is a digital microcontroller. To configure the intercom, register new users and other operations, the biometric intercom can contain a data input device, which is a personal computer.

The tasks set during the creation of a utility model, was made possible thanks to the following.

In contrast to the prototype, which uses the Touch Memory electronic key and a reader compatible with it, in the claimed utility model, the information obtained after processing the information from a fingerprint scanner is used as an electronic key. It is proposed to use an optoelectronic sensor as a reader in the claimed intercom, with which individual biometric parameters are determined

user obtained by scanning his fingerprint. According to these data, using the newly introduced microprocessor-based video processing unit, fingerprint information is converted into a unique code that allows you to identify the user. Thus, fingerprint information obtained by scanning a fingerprint ensures the fulfillment of the main task set - improving the reliability of device protection. At the same time, another problem is being solved - expanding the circle of persons with authorized access. In addition, there is no need for the cost of producing an identifier - an electronic key, the cost of which is about two dollars.

An essential feature included in the utility model is the connection of the controller to the actuator via a dedicated digital channel. Such control reduces the potential for electronic impact on the control object (lock), further increasing the reliability of the protection of the object. The introduction of a data entry device into the intercom system provides for setting up the intercom system, registering new users and other operations.

Thus, the combination of the above features allows us to solve the tasks.

The proposed utility model is illustrated in the drawing, which shows a functional diagram of a specific example of a biometric intercom. The following notation is introduced on the functional diagram:

1 - optoelectronic reader;

2 - controller;

3 - microprocessor;

4 - video processing unit;

5 - dedicated digital channel;

6 - actuator relay type;

7 - control object (lock);

8 - light indication unit;

9 - sound notification system;

10 - call block;

11 - intercom;

12 - switch;

13 is a data input device.

The optoelectronic reader 1 is used in the proposed utility model for converting the light flux containing biometric information (fingerprint) into digital data (DATA), which are transmitted through the XI connector to the video processing unit 4 of controller 2. The optoelectronic reader 1 is also electrically powered ( POWER, GND) and its state management (CONTROL). The video processing unit 4 is intended for preliminary filtering, processing, analysis and correction of a raster image received from an optoelectronic reader 1, as well as for converting fingerprint information into a unique code corresponding to a fingerprint. During the operation of the doorphone, this code performs user identification operations. Controller 2 carries out the function of controlling an actuator 6 of a relay type through connector X8 via a dedicated digital channel 5. Through connectors X5 and X6, controller 2 controls the system status indicators: light indication unit 8 and sound notification system 9. The OPEN signal coming from the switch 12 of the intercom unit through the X8 connector is designed to unlock access to the room by an external command (for example, from

apartments). Via USB (X9) via external input device

13 data, the intercom is configured, adding, deleting the user and other operations. The actuator 6 of the relay type is intended for direct control of access devices - control objects 7, on which the intercom is installed. Using connector X11, actuator 6 either closes or opens the power supply circuit of the control object (lock) 7 (LOCK_PWR_IN, LOCK_PWR_OUT, LOCK_GND), depending on the encoded command of controller 2 RELE_CTRL, which comes with + 12V power supply to connector X10 of the actuator 6 relay type. The control object (lock) 7 produces

Directly unlocking or locking the door to the secure room. Depending on the type of lock, the supply or shutdown of the electric power LOCK_PWR_OUT of a certain power brings the control object (lock) 7 to the required state. The light indication unit 8 simultaneously with the sound notification system 9 serve for visual and sound display of the status of the intercom, its operation mode. The signals RED, GREEN, GND of connector X2 and SOUND, GND of connector X3 are used by controller 2 to transmit the necessary information to the specified units 8 and 9 of the intercom. The intercom-intercom unit of the intercom consists of a intercom 11, through which voice communication between the intercom subscribers is made, and a switch 12, which allows you to open access and make a call to any subscriber.

In the claimed utility model as an optoelectronic reader 1 is used, for example, an optoelectronic sensor manufactured by NITGEN, South Korea, Seoul. Controller 2 is based on ATmega8L-8MI (MLF32) microcircuits manufactured by ATMEL (USA), as well as other industrial microcircuits, for example, ADM101EARM (mSOIC), 74HC125D (SO-14).

Relay type actuator 6 is a digital microcontroller assembled on the basis of the ATmega8-16MI (MLF32) industrially manufactured microcircuit manufactured by ATMEL (USA) and other industrially produced electronic components. For example, relays LS (Russia) can be used as relays, and electromagnetic locks ML-395A (Taiwan), ML-194 (Russia), electromechanical ZVD2 lock or their analogs can be used as locks.

Biometric intercom works as follows. The person with the right of access applies a finger to the window of the optoelectronic biometric reader 1. The fingerprint is read. The fingerprint information received by the reader 1 is transmitted to the microprocessor-based video image processing unit 4, in which it is converted into a unique code corresponding to the fingerprint, compared with the information stored in the memory unit of the microprocessor-based video image processing unit 4, and if the controller 2 matches, through connector X8, dedicated digital channel 5 gives the command actuator 6 relay type. At the same time, a green indicator lights up in the light indication unit 8, at the same time a short beep is heard. At the same time, the actuator 6 supplies the opening signal to the control object (lock) 7, which directly unlocks or locks the doors to the secure room. In case of unsuccessful identification, the signal to unlock the control object (lock) 7 is not generated, while the red indicator lights up and a long beep sounds. To configure the intercom, register new users and some other operations, the biometric intercom contains a data input device 13, which is a personal computer.

Thus, in the inventive utility model through the use of individual biometric parameters determined by scanning a fingerprint and a new, different from the prototype, circuit diagram of the intercom, it became possible to increase the reliability of protection of protected objects without additional costs and also significantly expand the range of persons with authorized access.

Claims (2)

1. Biometric intercom system containing an electrically connected reader, a controller with a microprocessor integrated in it, an actuator, a control object, as well as a call unit connected via an intercom and switching unit to a controller connected to a light indication unit and an audible warning system, characterized in that the reader is made optoelectronic, the controller is supplemented by a video processing unit and a dedicated digital channel connected to a relay-type actuator, representing a digital microcontroller. 2. The biometric intercom according to claim 1, characterized in that it comprises a data input device.