SU920782A1

SU920782A1 - Graphic information reader

Info

Publication number: SU920782A1
Application number: SU792709742A
Authority: SU
Inventors: Борис Яковлевич Жевелев; Владимир Иванович Тихоненко; Лев Борисович Рубинштейн
Original assignee: Центральное конструкторское бюро с опытным производством АН БССР
Priority date: 1979-01-09
Filing date: 1979-01-09
Publication date: 1982-04-15

Description

(5) УСТРОЙСТВО ДЛЯ СЧИТЫВАНИЯ ГРАФИЧЕСКОЙ (5) DEVICE FOR READING GRAPHIC

II

Изобретение относитс к автоматике и вычислительной технике, в частности , к устройствам дл считывани графической информации.The invention relates to automation and computing, in particular, to devices for reading graphic information.

Известно устройство дл считывани графической информации, которое содержит планшет с координатными шинами , подключенными к соответствующим коммутаторам, блок управлени , аналого-цифровой преобразователь (АЦП), съемник координат с датчиками положени , блок обработки аналоговых сигналов 1 „A device for reading graphic information is known, which contains a tablet with coordinate buses connected to the corresponding switches, a control unit, an analog-to-digital converter (ADC), a coordinate remover with position sensors, an analog signal processing unit 1

11едостатком этого устройства состоит в его конструктивной сложности .The downside of this device is its structural complexity.

Наиболее близким к изобретению вл етс устройство, содержащее планшет с координатными шинами, соединенными с блоками распределени тока, блок управлени , подключенный к источникам тока, блок обработки, соединенный со схемником координат и с ИНФОРМАЦИИClosest to the invention is a device comprising a plate with coordinate tires connected to current distribution units, a control unit connected to current sources, a processing unit connected to the coordinate circuit, and to INFORMATION

аналого-цифровым преобразователем, элемент И и ИЛИ 2.analog-to-digital converter, the element of AND and OR 2.

Недостатком устройства вл етс конструктивна сложность.The disadvantage of the device is constructive complexity.

Цель изобретени - упоощение устройства .The purpose of the invention is to enhance the device.

Поставленна цель достигаетс тем, что в известном устройстве, содеожащем планшет, выполненный в виде системы двух взаимно ортогональных The goal is achieved by the fact that, in a known device, a tablet made in the form of a system of two mutually orthogonal

Claims

To coordinate buses, one ends of which are connected to a zero potential bus, current distribution units, an analog signal processing unit, whose input is connected to a coordinate puller, and the output is connected to an analog-to-digital converter, and a control unit connected to a current source and analog-to-digital converter, current distribution units vOm are filled in the form of parallel-connected resistors, one ends of which are combined and connected to the corresponding current source, while others are connected to the ends of the respective terminals ordinatnyh tires. The drawing shows the block diagram of the device. The device includes a tablet 1 with coordinate buses 2, blocks 3 current distribution made in the form of resistors 4, sources 5 current, block 6 controls, puller 7 coordinates, block 8 processing analog signals and analog-to-digital converter (ADC) 9. The device works as follows . When the Start button is pressed (not shown in the same line) from block 6, one of the current sources 5 is given a control signal, according to which the current source 5 generates a pulse arriving at the resistors i of the corresponding block 3. The resistors C of blocks 3 are selected so that the amplitude-spatial characteristic of the electro-magnetic system formed, for example, a linear dependence of the voltage amplitude given in the 7-coordinate puller, on the position corresponding to the rotational coordinate lines 2. At the reading point, the 7-coordinate transducer m electromagnetic field into an electric signal in the presence of several scraper 7 Katushev inductance signals from their outputs to claim tread unit 8. wherein the respective algorithm is processed. The amplitude of the electrical signal at the output of block 8 is proportional to the removal of the puller 7 coordinates from the beginning of the reading field of tablet 1. This signal / t goes to the ADC 9 and the output of which generates a readable coordinate code issued to the block 6. At the end of the formations of one coordinate, the same way is determined friend coordinate. The implementation of current distribution units in the form of parallel-connected resistors makes it possible to significantly simplify the device in comparison with the known one. Claim device for read graphic information. containing a tablet made as a system of two mutually orthogonal coordinate buses, one ends of which are connected to a zero potential bus, current distribution units, an analog signal processing unit whose input is connected to a coordinate remover, and an output connected to an analog-to-digital converter, and a control unit connected to a current source and an analog-to-digital converter, which differs from the fact that, in order to simplify the device, the current distribution blocks are made in the form of parallel-connected resistors, and the ends of which are combined and connected to the appropriate current source, while others are connected to the ends of the corresponding coordinate tires “Sources of information taken into account during the examination of 1” USSR author's certificate for application tf 2382864 / 18-2, cl. G 06 K 11/00, 1976.

2. Japan patent W 1 4-136 7, cl. 97 (7) -BO, publ. 1979 (prototype).