SU926689A1

SU926689A1 - Device for reading data

Info

Publication number: SU926689A1
Application number: SU802886917A
Authority: SU
Inventors: Борис Александрович Гордеев; Валерий Александрович Штурмин
Original assignee: Предприятие П/Я Р-6863
Priority date: 1980-02-26
Filing date: 1980-02-26
Publication date: 1982-05-07

Description

(5) УСТРОЙСТВО ДЛЯ СЧИТЫВАНИЯ ИНФОРМАЦИИ(5) DEVICE FOR READING INFORMATION

II

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

Известно устройство дл считывани информации, содержащее излучатель , оптически св занный с фотодиодом , анод которого соединен с резис тором, подключенным к шине нулевого потенциала, и с одним из входов триггера , другой вход которого соединен с генератором стробирующих импульсов , источник посто нного напр жени , ключ первый вход которого , св зан с генератором стробирующих импульсов j выход подключен к катоду фотодиода , а второй вход ключа и излучатель соединены с источником посто нного напр жени 1 .A device for reading information is known, comprising an emitter optically coupled to a photodiode, the anode of which is connected to a resistor connected to the zero potential bus, and to one of the trigger inputs, the other input to which is connected to a gating pulse generator, the key is the first input of which is connected to the gate pulse generator j, the output is connected to the cathode of the photodiode, and the second input of the key and the radiator are connected to the source of constant voltage 1.

Наиболее близким к предлагаемому вл етс устройство, содержащее ис-. точник излучени , оптически св занный с фотоприемным элементом, подключенным к нагрузочному элементу иClosest to the present invention is a device containing is -. a radiation point optically coupled to a photodetector element connected to the load element and

к ключу, входы.которого соединены с источником питани и с генератором импульсов 1.2 .to the key, the inputs of which are connected to the power source and to the pulse generator 1.2.

Недостаток известных устройств состоит в их. высокой надежности.A disadvantage of the known devices is theirs. high reliability.

Цель изобретени - повышение надежности устройства.The purpose of the invention is to increase the reliability of the device.

Поставленна цель достигаетс тем, что в устройство ,. содержащее источник излучени , оптически св зан10 ный с фотоприемным элементом, подключенным к нагрузочному элементу и к первому ключу, входы которого соединены с источником питани и с генератором импульсов, вход которого в15 л етс входом устройства, введены второй ключ, соединенный с источником питани и излучени , и элемент И, входы которого подключены к нагрузочному элементу и к генератож ру импульсов, а выход- вл етс выходом устройства.The goal is achieved by the fact that in the device,. containing a radiation source optically connected to a photodetector element connected to the load element and to the first key, the inputs of which are connected to a power source and a pulse generator, whose input is 15 the input of the device, a second key connected to the power source and radiation , and the element And, the inputs of which are connected to the load element and to the generator of pulses, and the output is the output of the device.

Claims

The drawing shows the block diagram of the device. The device includes a photodetector element 1, made in the form of a photodiode, a radiation source 2, such as an LED, a power source 3, a first -k and a second 5 keys, a pulse generator 6, a load element 7 and an element 8. The device works as follows. The pulse generator 6 produces a strobe impulse only when it receives a signal from a synchro-perforated punched tape (not shown). The duration of the pulses is determined by the time it takes to light a single hole on the sync track. The incoming input key 5 stro impuls opens it and turns on the LED 2. If the photodiode 1 is illuminated in this case, then the resistance is reduced due to the presence of a permitting pulse at the output of the photodiode 1 which will flow. The signal arriving from the load element 7 at the first input of the AND 8 element turns it on, because simultaneously the second pulse of the 3to element enters the strobe pulse from the generator 6 and the signal corresponding to the logical unit is output from the AND output element. By dimming the photodiode 1, corresponding to the absence of a punched tape hole, the first input element And 8 does not have a signal from the load element 7 and, although the second input of the And 8 element has a pulse from generator 6, there is a logical zero signal at its output. The operation of the LED is not carried out in a constant mode, but synchronously, depending on the speed of passage of the hole on the sync track of the punched tape, thereby significantly reducing the power consumption of the power source and increasing the reliability of the device. An introduction to the device of the second call and the AND element allows significantly increasing its reliability. An apparatus for reading information comprising a radiation source optically coupled to a photodetector element connected to a load element and to a first key, the inputs of which are connected to a power source and a pulse generator, the input of which is an input to the device, characterized in that in order to increase the reliability of the device, it contains a second key connected to the power and radiation sources, and an element, whose inputs are connected to a load element and to a pulse generator, and d is the output device. Sources of information taken into account in the examination 1. USSR author's certificate number 667975, CL, P 06 K 7/14, 1978.

2. Japanese Patent No, cl. 97/7 / B 23, published. 1978 (prototype).