RU1770962C - Device for identification of magnetic cards - Google Patents

Abstract

The invention relates to automation and can be used in user identification systems. In order to increase the accuracy of the device, the means of input of an additional magnetic card and its decryption are introduced into it, which allows precise delimitation of user access to certain information of the data bank through one input device of identification cards. 3 ill.

Description

The invention relates to the field of automation and can be used in user identification systems.

An object of the invention is to improve the accuracy of a device.

Figure 1 shows the functional diagram of the device; figure 2 is a timing diagram of the operation of the device; Fig. 3 is an example of pulse shaping.

The device contains a magnetic card 1. magnetic card 2, information sensors 2.4 of the first and second groups, first and second position sensors 5, 6, amplifiers 7, 8 of the information signals of the first and second groups, first and second amplifiers 9.10 control signals , the first and second multiplexers 11, 12, the first and second counters 13, 14, the first and second pulse shapers 15, 16, the first and second elements 17, 18, AND, the OR element 19, the third and fourth counters 20 and 21, the decoder 22 , element 23 is NOT. the third and fourth elements And 24 and 25, the fifth counter 26, the memory unit 27. the shift register 28, the first

and second comparison blocks 29 and 30, C / 1 generator

31-C

The device operates as follows.

Magnetic card 1 is the user's personal card and contains the data necessary to identify the user. Magnetic card 2 is a card of information bank 1 and contains data defining Nj boundaries for access to information. The user can use cards 1, 2 both sQ independently or jointly. With non-independent use of only card 1, the user gains access to data, for example, a low level of access. With the independent use of Card 2, a wide range of users gets access to a low-level databank. To solve the problems of a high level of tolerance, it is necessary to use both cards 1 and 2. The combination of which provides the required level of tolerance for a given user, and thus, regulates the access of a specific set of users to a specific set of tasks

After turning on the power, initializing zero and turning on the pulse generator 31, the counter 21 is filled until a signal appears at the second output of the decoder 22, which prohibits further counting, and the counter 21 remains in this state. The counter 26 is similarly filled and remains in the state determined by the signal from the output of its high order bit. At the same time, the signal from the second output of the decoder 22 through the element 23 DOES NOT close the 24 L element and keeps the counters 13, 14, trigger 20. When one of the magnetic cards 1, 2 is input, the corresponding sensors 5,6 positions whose potential signals through amplifiers 8, 10 prepare elements 17, -18 I to be opened for opening. On the edge of the signal of sensors 5 or 6, the corresponding formers 15, 16 generate pulses, which through element 10 OR zero the counters 21, 26. In this case, potential signal from the second output of the decoder 22 Therefore, the reset signals from inputs zero counters 13, 14 itriggera 20. The output signal 23 is not formed member, the opening member 24 I.

After the reset, the counter 21 starts counting the pulses of the generator 31.

The clock pulses of the generator 31 through the element 24 And go to the clock input of the register 28 and the inputs of the elements 17, 18 I. At the specified zero position of the trigger 16, the clock pulses through the element 17 And go to the clock input of the counter 13. The counter 21 counts the decay of clock pulses and together with the decoder 22 determines the number of clock pulses required for polling through the multiplexers 11. 12, all sensors 3, 4 of the magnetic card information 1, 2. The counter 14 counts from the front of the clock pulses and with the help of the multiplexer 12 sequentially polls the outputs of the amplifiers 9 of the information signals of the sensors 4 of the card 2. From the output of the multiplexer 12, these signals are written in a sequential code to the shift register 28. After the polling of the sensors 3, 4, the data of the card 1, 2 are placed in the register 28. After passing the total number of pulses, it is necessary to poll 3,4 sensors at the second output of the decoder 22, a signal is formed again, which is fed to the control input of the counter 21 and prohibits pulse counting, through the element 23 it does NOT close the element 25 AND

The clock pulses of the generator 31 through the element And 25 are fed to the clock input of the counter 26, which provides enumeration of the addresses of the memory unit 27 Control codes from the outputs of the memory unit 27 are fed to the inputs of the comparison units 29, 30, the second inputs of which receive information from register 28 . When specified

of codes, the blocks 29 30 generate permission signals, which, together with the address codes of the counter 25, enter the control unit of the information bank providing information to the user

within the tolerance indicated by these address codes of the counter 26. In the proposed device, the user is identified by magnetic cards with a personal card and a data bank card.

If there is a set of data bank cards with different degrees of access to this or other data banks, the proposed device allows you to quickly change the degree of access by changing data bank cards

the user to information without changing the information content of the cards

Thus, the proposed device allows you to remove the means of inputting information from magnetic cards - keys to

lock - processing means to a considerable distance even when the processing means are close to the data bank, which delimits users' access to certain information Card combinations 1, 2 quickly regulate the access of many users to many tasks and information banks through one proposed device

Claims (1)

The claims A device for identifying magnetic cards, comprising a first group of information sensors, the outputs of which are connected to the inputs of the respective signal amplifiers of the signals of the first group, a first position sensor, the output of which is connected to the input of the first control signal amplifier, a pulse generator, a memory unit, an OR element, the first, second and third elements AND, the first pulse shaper, the first counter and the shift register, characterized in that. that, in order to increase the accuracy of the device, it contains the second, third and fourth counters, trigger, fourth element AND, element NOT, decoder, second pulse generator, first and second comparison fleas, first and second multiplexers, information sensors and amplifiers of information signals of the second group and a second position sensor and second amplifier of control signals connected in series, the output of which is connected to the input of the second pulse former and to the first input of the second element And, the inputs of the amplifier of information signals of the second group are connected respectively to the outputs of the information sensors of the second group and the outputs are with the corresponding inputs of the second multiplexer, the address inputs of the multiplexers are connected respectively with the corresponding outputs the first and second counters, the control inputs of the multiplexers are connected respectively to the direct and inverse outputs of the trigger and to the second inputs of the first and second elements And, and the outputs of the multiplexers are connected to the information input of the register, the output of the generator is connected to the counting input of the third counter and to the first inputs of the third and the fourth AND element, the output of the first control signal amplifier is connected to the input of the first driver and to the second input of the first And element, the output of the OR element is connected to the Reset of the third and fourth rtogo counters, the inputs connected respectively to the inputs of the first and second formers, the third counter outputs are respectively connected to the inputs of a decoder, which first output is connected to inputs of a mounting trigger and the second output with inputs Reset the trigger, the first and second smggchikov, with the second input of the fourth element And, through the element NOT - with the second input of the third element And and with the input For the third counter, the output of the third element And is connected to the third inputs of the first and the second elements And and with the clock input of the register, the outputs of the first and second elements And are connected respectively to the counting inputs of the first and second counters, the counting input of the fourth counter is connected to the output of the fourth element And, the overflow output is connected to Prohibition, and the information outputs are connected respectively to the inputs of the memory block and are the control outputs of the device, the inputs of the first group of the first and second comparison blocks are connected respectively by the outputs of the register, the inputs of the second group are connected with the corresponding outputs of the memory block, and the outputs are outputs respectively Resolution G and Resolution 2 of the device, the outputs of the amplifiers of the information signals of the first group are connected respectively to the inputs of the first multiplexer. ftrt i oaU3 nnnnnnnnnnnnnn a "5 g ILTS19P g, 14 PPPPPPPP ne At . 4// JTUILCLO. CM I ftl it to 1L IT I-1 Bts22 ( fr lttO- TO G-G G-EGT | crfV 5 / lge j n a jg n p n n   {M (