SU1430975A1 - Device for reading information off a punched token - Google Patents

Abstract

The invention relates to automation and can be used, for example, at security checkpoints. The aim of the invention is to increase the reliability of reading. A device for reading information from a perfozheton contains informational 1, synchronizing 2, control 3, 4 photoelectric converters, drivers 5, 6 pulses, element NOT 7, counter 8, decoder 9, triggers 10, 12, element 11, the output register 13, element 2I-2I-OR 14. The device is provided with blocking the transfer to the external device of false information if the token is incorrectly moved. 2 Il. from 8

Description

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The invention relates to automation and can be used, for example, at security checkpoints.

The purpose of the invention is to increase the reliability of reading.

FIG. 1 shows a functional diagram of the proposed device; in fig. 2 (a and b) - perforating and the location of photoelectric converters.

The device contains informational 1 and synchronizing 2, photoelectric converters, the first 3 and second 4 control photoelectric converters, the first 5 and second 6 pulse shapers, the element is NOT 7, the counter 8, the decimator 9, the first trigger 10, the element 11, the second trigger 12, the output register 13 and the element 2I-2I-OR 14.

The device works as follows.

Prior to lowering perforating all photoelectric converters are lit. When lowering the perfozheton first, the illumination of the transducer 3 is interrupted, and the synchronization 2 and informational 1 transducers read information from the corresponding tracks of the perfozheton, starting from the first line, and generate sync and information signals at their outputs. The counter 8 and the triggers 10 and 12 are transferred to the initial zero state by the signal "Reset supplied to the inputs of the first group of element 2I-2I-OR 14 from an external device.

The signal from the darkened converter 3 enables the operation of the counter 8 and triggers 10 and 12. According to the signals from the converter 2, the driver 5 generates pulses for recording information from the converters 1 into the output register 13. The pulses from the output of the driver 5 are counted by the counter 8 and fed to the input of the AI element.

For each write pulse, the previous information is shifted and written current, with the result that all information read from the perfozheton is written to the output register and output to the device output in parallel form.

When reading the last line, the second control converter 4 is darkened. On its signal, the pulse shaper 5 generates pulses that are fed to the input of the element 11. At the same time, if there were no failures in the device, then a number equal to the number of lines on perfogeton, at the output of the decoder, the signal turns on the signal, the trigger 10 switches to one state, and according to the impulse from the driver 5, the trigger 12 switches to one state, thus blocking the operation of the converter 4 and devices, and at the output of the device, a read resolution information signal is output from the output register.

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If the perfozheton is not completely lowered, then the trigger 12 will not start, since no signal is generated at the output of the imaging unit 6. At the same time, when the perfozheton is removed, the device will be reset by a signal from the first control photoelectric converter 3.

Thus, in the device, blocking the transmission to an external device of false information is ensured when the perfozheton is improperly moved.

Claims (1)

Invention Formula A device for reading information from perfozheton, containing information photoelectric converters, synchronizing and two control photoelectric converters, an output register whose outputs are information outputs of the device, and the inputs are connected to the outputs of information photoelectric converters, a counter, the counting input of which is connected to the input element NOT And the element, the first input of which is connected to the output of the element NOT, characterized in that, in order to increase the reliability of the reading and information, it contains two pulse makers, element 2I-2I-OR, two triggers and a decoder, the inputs of which are connected to the corresponding outputs of the counter, and the output - to the installation input to the first state of the first trigger, the reset inputs of the first and second triggers are connected to the inverse output of element 2I-2I-OR, the direct and inverse outputs of the first trigger are connected respectively to the second input of the element AND and to the inverse of the input of the first pulse shaper, the direct input of which is connected to the output of the synchronizing photoelectric electrical converter, and the output with the input of the element NOT and with the counting input of the counter, the reset input of the counter to the zero state is connected to the direct output of the element 2И-2И-OR, the output of the element is NOT connected to the control input of the output register, the input of the second imager connected to the output of the first control photovoltaic converter, and the output to the third input of the AND element, the inputs of the first group of element 2I-2I-OR are the input "Device Reset, the first input of the second group of inputs of the element 2I-2I-OR is connected to the output of the second control photoelectric converter, the direct output of the second trigger is the device ready output, and the inverse output is connected to the write lock input of the output register and to the second input of the second group of inputs of element 2I-2I-OR, the installation input in the single state of the second trigger is connected with the release of the element I.