SU1291697A1 - Electronic permutation lock - Google Patents

Abstract

The invention relates to a technique for protecting various objects from unauthorized access and improves the security of a lock. The invention eliminates the possibility of access by one person in the mode of using two dialing blocks (participation of two persons who know their different access codes is necessary) and reduces the probability of access by a person who knows the access code but does not have the skill to work with this dialing block. e. a person accidentally recognizing the access code. At the beginning of the code set on blocks 4 and 9, the generator of time intervals 14 is triggered, which determines the time interval through which the analysis of the correctness of the dialed codes is carried out. With the correct set of both codes for a given time interval, the outputs of the triggers 8 and 13 include signals in the TC. The state of the flip-flops 8 and 13 is processed by a signal from the time interval generator 14 using the decoder 15. the operation of the mechanism 1 and the display unit 7 and the resetting blocks 16, 5, 11, 10, 8 and the trigger 13. If the code is not correct or not timely (within a time longer than the interval defined by the generator 14) the trigger is corresponding to This set block does not work. Then, according to the signal of the generator 14, the decipheror 15 generates a signal at its second output. On this signal, the triggers 8 and 13 are reset, and block 16 controls the blocking. The blocking is enabled for the time interval defined by block 16 after three cases of incorrect or untimely dialing of the code. The lock is turned off by block 16 automatically. 1 hp f-ly, 2 ill. S O) N3; Oi co

Description

The invention relates to a technique for protecting various objects from unauthorized access, in particular to combination locks.

The purpose of the invention is to increase secrecy.

FIG. 1 shows a functional diagram of an electronic code lock; in fig. 2 - functional block diagram. The electronic lock has an actuator 1, a time delay block 2, a code reception block 3, a code dialing block 4, a false code determination block 5, an OR element, a display block 7, a trigger 8, an additional block of code dialing 9, an additional block 10 receiving code, additional block 11 for determining a false code, additional element OR 12, additional trigger 13, time slot generator 14, decoder 15, control block 16.

The control unit has a switching element 17, a counter 18, a trigger 19, a relay 20, an OR circuit 21.

Electronic code lock works as follows.

In the initial state, the number K in the counter 18 of block 16 is recorded (the number of incorrect code sets, after which the next time you dial the wrong key, the lock is locked). The time interval generator is configured to output a signal to the decoder 15 after the in time has elapsed from the moment a signal from one of the set blocks arrives at the time interval generator. In blocks 3 and 5, the values of the tolerance codes for blocks 4 and 9 of the set are set with jumpers. In the mode of using both blocks of the set, blocks 4 and 9 should be structurally placed so that the possibility of simultaneous dialing of codes by one person is excluded. The set of codes on blocks 4 and 9 of the set must be started simultaneously (the interval is no more than 1-2 s). The counter 18 of block 16 records the number K, equal to the permissible number of attempts of unauthorized access.

When the code is typed on blocks 9 and 4, the signals corresponding to the symbols are sent to blocks 3 (10) and 5 (AND) and generator 14. The signal at the output of block 3 appears only if the correct code is entered. In this case, this signal switches the trigger 8, which outputs a signal to the input of the decoder 15, and the signal from the output of the block 10 (in the case of a correct set on the block 9) switches the trigger 13, the signal of which is fed to the input of the decoder 15. The time interval generator after the time ia from the moment of the start of the code generation produces a signal that is fed to the input of the decoder 15. In the case of the correct dialing of the code on both blocks

4 and 9, at a predetermined time interval, the signal from the first output of the decoder 15 is supplied to the Extra mechanism 1 (the lock is opened) and to the time delay unit 2. In this case, the signal from the output of block 2 enters the input of block 7 of the display (illuminated of the transponder "Enter"), and after a predetermined time interval (determined by block 2) by signals from the output of block 2, the actuator 1 turns off (simultaneously the transponder goes off) Enter the display block ), and the signals from the third output set the blocks 3, 5, 8, 13, 11 and 10 to the initial state. In case the code is dialed incorrectly in the dialing block, the corresponding false code definition block and the signal from its output enters through the element and 12 and the input control unit 16. In the control unit (Fig. 2), the signal enters the counter 18, reducing its content by one, and through the switching element 17 and the OR element 21 arrives at the input of the time delay unit 2. At the same time, unit 2 is activated and on the display unit 7, the transponder “Error. After a certain time

5, block 2 reduces the signal from block 7, and the “Error goes out. If a wrong set is retried or the set on one of blocks 4 or 9 of the set does not end in a limited time interval, block 16 is activated

0 in the same way (signal from the second output of the decoder). As soon as the counter value becomes equal to zero, the switching element 17 operates, connecting the trigger input 19 to the input of the block 16. At the next wrong dialing or exceeding the allowable dialing time, the signal from the block 16 input goes to the trigger 19, which triggers and switches on the relay 20. relay outputs appear at a time interval equal to the blocking duration. According to these signals, the counter 18 and the trigger 19 are reset, and the device operates in the manner described.

Increased secrecy is achieved by the fact that, in the proposed device, the access resolution signal is generated only when both people enter the correct password within a specified period of time.

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Claims (2)

1. An electronic code lock containing an actuator, the first input of which is connected to the first output of the time delay block, the code receiving block, the first input connected to the output of the code set block, the false code definition block, the OR element, the first input of which is connected to the output of the block time delay display unit, the input of which. connected to the output of the time delay block, a trigger, characterized in that, in order to increase secrecy, it contains an additional code dialing block, an additional code reception block, an additional false code definition block, an additional OR element, an additional trigger, a time interval generator, a decoder, a control unit, wherein the second input of the actuator is connected to the first output of the decoder and the first input of the time delay unit, to the second input of which through the control unit an additional output is connected element OR, the first input of the false code definition block connected to the output, the second input of the additional false code definition block connected to the output, the third input of the decoder connected to the second output and the second input of the OR element whose output is connected to the first trigger inputs and the additional the trigger, to the second inputs of which are connected respectively the outputs of the code receiving unit and the additional code receiving unit, the outputs of the trigger and the additional trigger are connected respectively to the third and in the fourth / L g V / / G9 Compiled by A. Zakharchenko Editor O. BugirTehred I. VeresKorrektor I. Muska Order 214/34 Circulation 403 Subscription VNIIPI USSR State Committee on the case of inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Design. four 0 five five to the inputs of the decoder, and the output of the generator of time intervals, the first input of which is additionally connected to the output of the dial-up block, is connected to the pin of its input, and the first input of the block is determined. no false code, the second input of the time interval generator is connected to the output of the additional code dialing unit and the first inputs of the additional false code determination unit and the additional code receiving unit, the second inputs of the code receiving flea and the false code determination unit, and the second inputs of the additional false detection unit code and an additional block of code reception connected to the second output of the block time delay. 2. A lock according to claim 1, characterized in that the control unit comprises a switching element and a counter connected in parallel with the first inputs, a trigger, a relay, an OR circuit connected in series, the counter output connected to the second input of the switching element whose output is connected to trigger input, the second input of which is connected to the first relay output, connected to the second counter input, and the second output is switched, its element is connected to the second input of the OR circuit. / 18 20 FIG. g