SU652162A1 - Information input arrangement - Google Patents

Description

The invention relates to the field of automation, computer technology and is intended to enter information into a computer.

A device for inputting information is known, comprising switching elements and a diode encoder 1.

A disadvantage of this device is the low reliability of the input information due to the lack of means of autonomous control of information.

The closest technical solution to this invention is an information input device containing switching groups. elements, normally closed. the contacts of which are connected in series with the switching contacts and the corresponding normally closed contacts are connected to each other, to the inputs of the encoder and to the code sign forming unit, the switching contacts of the first switching elements of each group are connected to the zero potential bus, normally closed contacts of the last switching elements of each group, except the first , are connected to the corresponding inputs of two elements AND-NOT 2.

The disadvantage of this device is the low accuracy of the input information.

The aim of the invention is to increase the reliability of the input information.

This is achieved by introducing the third AND-NIE element, three indicia elements, OR elements, the corresponding inputs of which are connected to the normally closed contacts of the last switching elements of all groups, the AND element, the first input of which is connected to the output of the code forming unit and the first one. the second, third, fourth and fifth inputs to the corresponding outputs of the OR elements, and the output to the input of the second display element and the device output, the inputs of the third AND-NO element are connected normally closed contacts poslednih.kommutatsionnyzk elements of all the groups, and output - With the third display element.

The block diagram of the device shown in the drawing.

The device contains the first group of switching elements 1-16, the second group of switching elements

3

17-32, the third group of switching elements 33-48, the fourth group of switching elements 49-64, the first element AND-NOT 65, the second element AND-NOT 66, the element AND-NOT 67, the third display element 68, the encoder 69-103 , the unit of formation of the characteristic code 104-109, the first display element 110, the element AND 111, the elements OR 112-117, the second element of the indication 1.18.

The device works as follows.

In the initial state, the outputs of the encoder 69-103, the inputs of the elements OR 112-117, the inputs of the characteristic formation block code 04-109 and the first input of the element 111 are high potential. The first display element 110 is turned off.

When a certain switching element of any of the groups 1-16, 17-32, 33-48, 49-64 is switched on from the outputs of the OR elements 112-117 and the code forming unit of the code 104-109, low potentials are fed to the inputs of the AND 111 element, s the output of which is formed by a signal Sign code, which includes the second element of the display 118 and informs the operator about the input information in the computer. The code from the outputs of the encoder 69-103 and the outputs of the elements AND-NOT 65,66, 67 enters the outputs of the device.

Elements 112-117 provide a blocking of the generation of signals Sign of the code with simultaneous operation of switching elements belonging to different groups.

In the event of a device malfunction, for example, any of the normally closed contacts in the non-switched state, the scientific research institute of the switching element will

open, at the output of the element IS-NE 67 there will be a low potential, which will turn on the display element 68, signaling about the device malfunction. Signal The sign of the code from the output of the element And 111 is absent in this case.

The first display element 110 is turned on in the same way in the case of a closure 652162

nor any normally closed and normally open contacts with each other.

Thus, in the event of a malfunction of the input device, it blocks the input of information into the computer.

Claims (2)

1. Control reading device KSU-2, Technical conditions PT3.049.040.TU. Revisions 1-66. 2. USSR author's certificate number 378831, cl. G 06 F 3/02, 1971.