SU628507A1

SU628507A1 - Graphic information readout arrangement

Info

Publication number: SU628507A1
Application number: SU762352723A
Authority: SU
Inventors: Юрий Иванович Тормышев; Валерьян Семенович Давейнис
Original assignee: Институт Технической Кибернетики Ан Белорусской Сср
Priority date: 1976-04-26
Filing date: 1976-04-26
Publication date: 1978-10-15

Description

Изобретение относитс к области автоматики и вычислительной техники.The invention relates to the field of automation and computing.

Известно устройство дл считывани графической информации, содержащее планшет с координатными шинами, коммутаторы и вентили опроса координат X и У, считывающий элемент с усилителем и формирователем , вентили считывани , входы которого св заны с выходами счетчика координат, генератор импульсов, св занный со схемами управлени выбором координатных шин X и У, счетчиком отсчета координат и вентил ми считывани .A device for reading graphic information is known, comprising a tablet with coordinate buses, switches and interrogation valves X and Y, a reading element with an amplifier and a former, read valves whose inputs are connected to the outputs of a coordinate counter, a pulse generator associated with the selection control circuits coordinate buses X and Y, a reference counter of coordinates and reading valves.

Недостаток этого устройства состоит в низком быстродействии. .The disadvantage of this device is low speed. .

Наиболее близким к данному изобретению вл етс устройство, содержащее планшет, вьтолненный в виде системы двух взаимно-ортогональных координатнь1х шин, соединенных с первым коммутатором , вход которого подключен к реверсивному счетчику и через первый элемент И и второй коммутатор к последовательно соединенным усилителю и съемнику координат , генератор импульсов, подключенный The closest to this invention is a device comprising a tablet, implemented as a system of two mutually orthogonal coordinate buses connected to the first switch, whose input is connected to a reversible counter and through the first And element and the second switch to the serially connected amplifier and coordinate remover, pulse generator connected

к реверсивному счетчику, триггер управлени , одновибратор и второй элемент Иto reversible counter, control trigger, one-shot and second element AND

M.M.

Недостаток такого устройства заключаетс в конструктивной сложности.The disadvantage of such a device is its structural complexity.

Цель изобретени состоит в упрощении устройства.The purpose of the invention is to simplify the device.

Зто достигаетс тем, что в предлагаемом устройстве триггер управлени соединен с реверсивным счетчиком, со вторым коммутатором, одновибратором и со вторым элементом И, входы которого подключены к одновибратору и ко второму коммутатору.This is achieved by the fact that in the proposed device the control trigger is connected to a reversible counter, to the second switch, one-shot and to the second element I, the inputs of which are connected to the one-shot and to the second switch.

На чертеже представлена блок-схема предлагаемого устройства.The drawing shows a block diagram of the proposed device.

Устройство включает первый коммутатор 1, планшет 2, реверсивный счетчик 3, первый элемент И 4, генератор импулсе 5, второй элемент И 6, второй коммутатор 7, съемник координат 8, усилитель 9, триггер управлени 1О и одновибратор 1.1.The device includes the first switch 1, tablet 2, reversible counter 3, the first element AND 4, the generator impulse 5, the second element AND 6, the second switch 7, the coordinate remover 8, the amplifier 9, the control trigger 1O and the one-shot 1.1.

Claims

The device works as follows. The pulses from the generator 5 are fed to the counting input of the reversible counter 3, the outputs of which are decrypted by the switch (bus selector) 1 connected to the system of two mutually perpendicular coordinate buses of the tablet 2 When the coordinate remover is excited 8 by the coordinate bus above which it is located, the coordinate code is retrieved from counter 3 through the first element 4, the control input of which receives a signal from the coordinate remover through amplifier 9; the same signal switches the second switch 7 to the commutation coordinate busbar to search for the next coordinate Control trigger 10 with single-oscillator 11 and second element And 6 analyzes the timing sequences of the axes of the second coupling machine (coordinates) 7, and controls the reversible counter 3, select the optimal direction of switching tires. When the X coordinate is read, for example, control trigger 10 is shifted, which causes a change in the counting direction of the reversible counter 3 and the launch of a one-shot 11 that generates a reference signal with a duration of Avnoi time to 5mytatsiya half of the tire on one of the axes. If the signal is read next. coordinates, for example -Y, comes at the end of the reference signal, then it passes through element 6, throws control trigger 10, changes the counting direction, resets one 11 Vibrator immediately after a small delay starts it again. If the signal about the next shift falls within the time interval of the generated reference signal, then the described procedure of changing the direction of switching (reverse) is repeated. 074 If the time interval of the read pulse increases to the extent that it becomes longer than the reference interval, then the signal does not pass through the AND 6 element and the reverse does not change (rebirth from the 1O flip-flop). In this case, the bus switching order is performed, when the time intervals of the read pulse will again be placed in the time interval of the reference pulse generated each time the one-shot is started. The introduction of new constructive connections allowed to simplify the design of the device. An apparatus for reading graphic information comprising a tablet made as a system of two mutually orthogonal coordinate buses connected to a first switch, the input of which is connected to a reversible counter and through a first And element and a second switch to a serially connected amplifier and coordinate remover, a pulse generator, connected to a reversible counter, a control trigger, a one-shot and a second AND element, which is described in that, in order to simplify the device, there is a trigger in it ION coupled to the down counter, a second switch, One-Shot timer and a second AND gate having inputs to poklyucheny monostable multivibrator and to the second switch. Sources of information taken into account in the examination; 1. USSR author's certificate number 466522, cl. Q About K 11 / OO, 1971.

2. US patent number 3818133, cl. 178-18, 1974.