SU1109772A1 - Device for reading information - Google Patents

Abstract

1. A DEVICE FOR READING INFORMATION, containing a block of information receivers, a key block, a driver, a first sensor of clock pulses, a tape drive mechanism, outputs of a block of information receivers connected to information inputs of a key block, a driver output connected. With the control input of the key block, the outputs of the key block are the outputs of the device, characterized in that, in order to increase the readability, it contains a second clock sensor and a trigger, the output of which is connected to the driver input, and the inputs are connected respectively to the outputs of the first and second sync pulse sensors. 2. A device according to claim 1, characterized in that the first and second sensors of the sync pulses are kinematically connected with the tape mechanism through a matching element {with respect to speed, made in the form of a re (L ductor).

Description

The invention relates to automation and can be used in devices for reading information from tape and card information carriers. 5

Known apparatus for reading information from perfonositeley containing block information receiver unit key generator, the sync detector., Lentoprdtyazhny mechanism unit outputs data receivers are connected to the data inputs of the key unit, an output driver coupled to a control input of a key block, the block outputs License ^{keys, s} whose are the outputs of the device til and 12].

A disadvantage of the known devices is the insufficiently high reliability of reading information, due to ² θ due to the low accuracy of the synchronization pulses.

The purpose of the invention is to increase the reliability of reading. ²⁵

This goal is achieved by the fact that a device containing a block of information receivers, a block of keys, a driver, a first pulse generator, a tape drive, ³ θ outputs of a block of information receivers are connected to information inputs of a block of keys, the output of the driver is connected to the control input of the block of keys, outputs the key block are 35 outputs of the device, contains a second clock sensor and a trigger, the output of which is connected to the input of the driver, and the inputs are connected respectively to the outputs of the first and second tchikov clock.

Moreover, the first and second sensors of the sync pulses are kinematically connected with the tape drive mechanism through a speed matching element 45 made in the form of a gearbox. _i

The drawing shows a functional diagram of the device.

The device comprises a unit 1 of information receivers, a punched tape 2, a tape drive 3, a first 4 and a second 5 clock sensors, a trigger 6, a driver 7, a key block 8, a gear 9.

Block 1 information receivers op-. it is connected through a punched tape 2 with a light source (not shown) mechanism 3, mechanically through a gearbox connected with sensors 4 and 5 of the clock pulses, the outputs of the sensors 4 and 5 of the clock pulses are connected to the inputs of the trigger 6, the output of which through the shaper 7 is connected to the control input of the key block 8 , · The information inputs of the key block 8 are connected to the outputs of the block of information receivers, the outputs of the key block 8 are the outputs of the device.

A device for reading information works as follows.

When drawing a punched tape for each category of code combination from the output of block 1 to the information input of block 8, signals about the presence (absence) of information on each track of the punched tape are received. When the mechanism 3 is triggered, the sensors 4 and 5 are triggered alternately. When the sensor 4 is triggered, trigger 6 is switched to the logical 0 state, and from the output of the driver 7, the gate 8 receives a gating pulse to read the corresponding line of the punched tape. When the sensor 5 is triggered, trigger 6 is set ’to the logical state“ 1 ”, and from the output of the driver 7, the gate 8 receives a gating pulse to read the next line of punched tape.

The technical and economic effect of the use of the invention is to increase the reliability of readings by eliminating false readings in the presence of the phenomenon of bounce and instability of the edges of the clock pulses.

Compiled by N. Milyaev Editor N. Bobkova Tehred M. Gergel · Corrector S. Shekmar Order 6086/35 Circulation 699. · Subscription

Claims (2)

. 1. A DEVICE FOR READING INFORMATION, comprising a block of information receivers, a block of keys, a driver, a first clock sensor, a tape drive, the outputs of the block of information receivers are connected to the information inputs of the key block, the output of the driver is connected. with the control input of the key block, the outputs of the key block are the outputs of the device, characterized in that, in order to increase the reliability of reading, it contains a second clock sensor and a trigger, the output of which is connected to the input of the driver, and the inputs are connected respectively to the outputs of the first and second sensors clock pulses. 2. The device according to π. 1, characterized in that the first and second sensors of the clock pulses are kinematically connected with the tape drive through the speed matching element, made in the form of a gearbox.