SU1583575A1 - Electronic lock - Google Patents

Abstract

The invention relates to electric locks and is intended for security systems for objects of various purposes, such as office premises, safes. The aim of the invention is to increase the secrecy of the device. The goal is achieved by the fact that the lock has a generator 7, an additional emitter 8 and an additional photoelectric element 9. The key code is read only if there is a key in the lock and at certain times determined by the generator. 1 il.

Description

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

The aim of the invention is to increase secrecy.

The drawing shows the functional & electronic lock circuit.

The electronic lock contains emitter 1, first 2 and second 3 photoelectric elements, first 4 and second 5 coincidence circuits, actuator b, generator 7, second emitter 8, third photoelectric element 9 and third scheme / 10 coincidence.

Electronic lock operates as follows.

From the moment the power supply is turned on to the optoelectronic lock circuit, the generator 7 produces voltage pulses, the follow-up period and the duty cycle of which are determined by the human response. The pulses arrive at the first input of the matching circuit 10 and to the emitter 8j. The emitter 8 generates a light pulse, which is perceived by the photovoltaic cell 9. From the output of the photovoltaic cell 9, a voltage pulse is output to the second input of the matching circuit 10. The voltage pulses to the first l second inputs of the coincidence circuit 10 arrive simultaneously, and the emitter 1 is de-energized, | When a key is inserted, the light pulses from the emitter 8 to the photoelectric element 9n \ e penetrate, and the coincidence circuit 10 when a voltage pulse arrives from the generator 7 turns on the emitter 1.; The photovoltaic cells 2 under the influence of light pulses penetrating through the holes in the key produce voltage pulses that are fed to the inputs of the matching circuit 4. If | at all inputs of the circuit 4 of coincidence there are voltage pulses, then the signal Log.1 appears at its output.

If at least one of the inputs of the circuit 4 has no coincidence of the voltage pulse (in

While the remaining pulses of the voltage on the remaining inputs of the circuit 4 are), then the output of the signal is a Log. ABOUT.

In the key at the location of the photoelectric elements of the 3 holes there is no, so the voltage pulses at the first inputs of the circuit 5 do not match. If there is a coincidence of the sequence of voltage pulses at the second input of the circuit 5 and the absence of voltage pulses at the first input, a sequence of voltage pulses is generated, which is fed to the input of the actuator. The lock works. In the absence of a voltage pulse train at the second input of the matching circuit 5, or in the presence of a voltage pulse train, a log signal appears at the first input at the output of the matching circuit 5. Oh and the actuator doesn't work.

Claims (1)

Invention Formula An electronic lock comprising an emitter optically coupled to the first and second photovoltaic cells, the terminals of the first photovoltaic cells connected to the inputs of the first coincidence circuit, the output of the second photovoltaic cell connected to the first input of the second coincidence circuit, the second input of which is connected to the output of the first coincidence circuit, and the output is to an actuator, characterized in that, in order to increase secrecy, the lock comprises a generator, a second radiator, a third photoelectric element, and By the coincidence circuit, the first output of the generator is connected to the second radiator, which is optically coupled to the third photovoltaic cell, the second output of the generator is connected to the first input of the third coincidence circuit, the second input of which is connected to the third photovoltaic cell, and the output of the third coincidence circuit is connected to the first radiator.