SU705481A1 - Device for reading out graphical information - Google Patents

Description

(54) DEVICE FOR READING GRAPHIC INFORMATION

The invention relates to the field of automation and computer technology and can be used in devices converting graphic information into a digital code as an input device. A device for reading graphic information containing a system for optical-mechanical scanning of a light beam, a photomultiplier, a generator of synchronizing and counting pulses connected through control gates, logic elements and triggers to an ordinate counter and further to a code-voltage converter 1 The disadvantage of the device is the complexity due to the large number of functional elements. In addition, the device does not allow working on different codes, which significantly limits its functionality. The closest technical solution to this invention is a device for reading graphic information containing a b-6k optical mechanical scanner, a photomultiplier, a block of controllable keys, a tape drive mechanism with punched tape, on which numbers are fixed in a certain code, corresponding to certain steps of movement punched tape, reference frequency generator, punched tape reading unit, first and second counters, comparison unit. A optomechanical scanning unit with a rigid kinematic link is connected to a tape mechanism, the output of the photomultiplier tube and the reference frequency generator are connected to a block of controllable keys, the output of which is connected to the first counter. The output of the first counter is connected to the comparison unit, the other input of which is connected to punched tape reader. One of the outputs of the comparison circuit is connected to the first counter, the second to the second counter 2. A disadvantage of the known device is its limited functionality, and in particular, the inability to enter information in various codes. The aim of the invention is to expand the functionality of the device. This is achieved by including in the device containing successively connected optomechanical scanning unit, photomultiplier and controllable keys unit, a read zone restriction unit and a displacement transducer, connected by a q-ray optomechanical scanner 5, cJ block of controllable keys, and block the readable zone

connected to a photomultiplier, with § the block of the zone reading limit contains a circuit comparing the NIN codes and a circuit for setting the zone.

The drawing shows the block diagram of the device. ; :;

Arrange with & deer a Christmas tree 1 optical-mechanical rajvertki, njSeoepa- 4V recipient 2 move-code, photomultiplier 3, unit 4 controlled keys, unit 5 is limited,. nor read zone, computer communication unit 6, circuit 7 comparison code, Lchem. 8 task zone,. .

Unit 1 optical mechanical; kinematically connected with the spray,

6b; by diverter 2 the displacement code and optically with photoelectric. multiplier 3, the output of which is connected to block 4 of control e1 "keys, the other input of which is connected to converter 2. displacement-output code - to block b of communication with computer, output- travel of transducer 2 displacement- 30

 connected to the input of block 5 of the analogue-readable zone, and the output of this block is connected to the photomultiplier 3i

The device works as follows 35 times. -; - - -. ..

Unit 1 optical mechanical; a screwdriver provides a planar sweep of the incident and reflected beam, which reflects from the Lentus-Yositö- 0 l of graphical information onto the photomultiplier 3. The transducer 2 displacement - the code provides the conversion of trans-. ; The reading beam from the selection HotO of reference to the line of the graph is in the numerical equivalent represented in the selected code. The selection of the code is provided by changing the Backlog of day 6. The obtained digital equivalent of the graph ordinate is fed to the input of the 4 controlled keys block and to the input of the 5 block of the read zone restriction. The signal at the moment of intersection of the reading curve, the curve curve, the digital equivalent of the graph ordinate from the code disk enters the computer communication unit 6 and is transferred to another input of the 4 controlled keys block. The read zone is limited with the help of the code comparison circuit 7 8 task zone. The code comparison circuit 7 generates a signal to detect the incidence of the photomultiplier in this 1; the scanning of the output beam.

The device allows to significantly expand the functionality of time and information output in different codes, and has high reliability.

Claims (2)

1. A device for reading graphic information containing sequentially connected optical mechanical scanner unit, a photomultiplier tube and a unit of controllable keys, which has the same key. in order to widen the area of application of the device by issuing information in different codes, it contains a block of restriction of the readable zone and a displacement transducer-code connected to the block of optical-mechanical scanning, block of controlled keys connected to a photomultiplier. 2, The device according to claim 1, about tl and -. This is due to the fact that the block of restriction of the readable zone contains. code comparison scheme and zone setting scheme Sources of information that are always considered in the examination 1. ABTOpiCRoe testimony, USSR No. 435476, G OC 11/00 / 197i - ..;. 2.Yevteyeo Yu.N., Yurukhin B.N. Digital systems for processing scanned information. M., Energie, 1975, p. 57, fig. 15 (prototype) SSM or nepfopaftop L 7 eJ 8