SU1240859A1 - Electronic coded lock - Google Patents

Description

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

The purpose of the invention is to increase the secrecy of the device by reducing the dependence of the probability of selecting the resolution code on the length of the time interval during which the selection attempts are made.

The drawing shows a functional diagram of the proposed device.

The electronic lock has an executive unit 1, a time delay unit 2, an IZ element, an indication unit 4, a code receiving unit 5, a trigger .6, a time relay 7, a switching element 8, a counter 9, an OR 10 element a code dialing unit 11 , block 12 receiving a false code, additional trigger 13, additional elements And 14 and 15.

The device works as follows.

In the initial state in the counter 9 the number k is written, the first output of the switching element is connected to its second input, the first additional element And 14 is opened at the second input by the signal of the additional trigger 13, the element And 3 is open at the first input by the signal from the trigger 6.

With the correct set of code on the block 11 of the set, the signal from the output of the block 5 receiving the code through an open element And 3 enters the input of the actuator 1 and the input of the block 2 time delay. The actuator triggers, and on block 4 of the indication, a signal from block 2 lights up a banner. Enter. After a certain time has elapsed, block 2 is set off from 5;

Switches on the executive unit 1, and on the display unit 4 of the display the transport goes out.) ant Enter. If the sequence of code characters is incorrectly typed, the signal from block 12 for determining a false code through the open first additional element AND 14 goes to the second input of counter 9 and through the switching element 8 and the element OR 10 to the first input of time delay 2. Counter 9 set10

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state (K-1). Simultaneously with the activation of the block 2, the block 4 of the indication of the banner is turned on (Error). After a certain time has elapsed, block 2 turns off the indication and sets blocks 5 and 12 to their initial state. If the dialing is repeated incorrectly, the device operates in the same way, and counter 9 is set to state (K-2), etc. . As soon as the value of the counter 9 becomes zero, the switching element 8 is activated and connects the output of the first additional element 14. And to the trigger input 6. An incorrect dialing attempt after this triggers the trigger 6. At the same time, the signal from its output enters time relay 7 And element 3 is closed. After a time interval equal to the duration of the blocking, the signal: al from the output of time relay 7 through the element OR 10 is fed to the input of block 2 a time delay. Odio time signal from the output of the relay 7 time enters the inputs of the counter 9 and the additional trigger 13 and the second input of the trigger 6. The counter 9 is set to the original

30 state (number K in the counter), trigger 6 switches, open element AND 3, additional trigger 1 3 switches, opening the second additional element 15. In the case of dialing after this correct code, the device works in the manner described. In the case of an incorrect dialing of the code, the signal from the output of the block - 12 determining the false code through the open second additional element 15 goes to the trigger 6. Switching the trigger 6 places the lock in the locked state.

Thus, the goal set is to increase the lock secrecy by introducing an additional trigger and additional elements, which allows setting the lock mode when the wrong set of code follows the end of the previous lock, in the case of an attempt to select a code using the brute-force method, the number of attempts at matching during the in55 terval time T.

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Claims (1)

ELECTRONIC CODE LOCK, containing an executive unit connected by a first input to the first output of the time delay unit, a second input to the output of the And element, a second output of the time delay unit is connected to the input of the display unit, a code receiving unit, the first output connected to the first input of the And element , the second input connected to the first output of the trigger, the second output of which is connected to the first input of the time relay, and the first input of the trigger is connected to the first output of the switching element, the second input is to the first output of the time relay and the first input of the counter, the second output of the time relay is connected to the first input of the OR element, the first input of the code receiving unit is connected to the first output of the code dialing unit, the second output of which is connected to the input of the false code detection unit, characterized in that, in order to increase privacy, it contains an additional trigger and additional AND elements, the first input of an additional trigger connected to the first output of the time relay and the first input of the counter, the second input of the additional trigger connected to the output of the element AND, the second input the time delay unit and the second input of the executive unit, the first output of the additional trigger is connected to the first input of the first additional element And, the second output is connected to the first input of the second additional element And, the second input of which is connected to the output of the false code determination unit sfi and the second input of the first additional element And, the output connected to the first input of the switching element and the second input of the counter, the output connected to the second input of the switching element, the output of the second additional electronic The AND element is connected to the first inputs of the trigger and the switching element, the output of which is connected to the second input of the OR element, the output of which is connected to the second input of the time delay unit, the third output of which is connected to the second input of the code receiving unit and the second input of the false code determination unit. SI with