SU911494A1 - Analogue signal input device - Google Patents

Description

(5) ANALOG SIGNAL INPUT DEVICE

one

The invention relates to automated process control systems and is intended to input analog information into a control computing system. ;

A device for inputting analogue signals is known, which contains sensors and located near sensors from. a normalization block, a filter block, a middle level signal switch, a switch control extender, a switch control block, analog-digital converters connected via a interface splitter, a quick coupler adapter and a fast data transfer unit with a processor 11, connected to the control computer complex;

The main disadvantage of this system is its complexity.

Closest to the proposed device is a device containing sensors on the transmitting side, channels

CONNECTIONS, on the receiving side, connected in series normalization blocks, filter blocks, middle level signal switches, switch control blocks, switch control extenders, analog-digital converter, processor and main memory 121.

The disadvantage of the system is a large number of communication channels, complexity and low reliability.

The purpose of the invention is to simplify the device by reducing the number of communication channels.

The goal is achieved by

Claims (2)

IS that the switching units of sensors, each of which contains a master pulse generator, a pulse counter, are inserted into a known analog signal input device containing sensors, communication channels, a processor and an analog-digital converter and a 20-second memory block associated with it, the input of which is connected to the generator output 3, the decoder, the inputs of which are connected to the counter outputs, the keys, the control inputs of which are connected to the outputs of the decoder, the inputs are connected to the sensors, and the outputs are combined, the control unit connected connected to the processor, the combined outputs of the keys are connected by the first communication channels to the input of the analog-digital converter, the outputs of the master oscillators are connected by the second communication channels to the start input of the analog-digital converter, the outputs of the control unit are connected to the power input of the third switching units by the third channels connection. The drawing shows a block diagram of the input signal input analog signals. The device comprises switching units 1 on the transmitting side, which include a master pulse generator 2, a pulse counter 3, a decoder 4, keys 5 and sensors 6. On the receiving side, the device contains a processor 7 analog-to-digital converter 8, a RAM block 9, a block 10 controls The receiving and transmitting sides of the device are connected by communication channels 11-13. The device works as follows. The processor 7 at the time specified in the program issues to the control unit 10 a signal for switching on the switching unit 1, while the output key of the control unit 10 is supplied with power to the generator 2 of the switching unit 1. From generator 2 to the input of the counter; 3, pulses start to flow and a sequential interrogation of sensors 6 connected via keys to the input of analog-digital converter 8 is performed. To input of analog-digital converter 8 signals from the sensors arrive in the form of pulses with a duration equal to the pulse period driving oscillator 2. The signals from sensors 6 are accompanied by start-up pulses of an aluminum-to-digital converter, which determine the start of conversion. The trigger pulse is fed to the input of the analog-digital converter 8 from the output of generator 2 via communication line 12. Analog-digital converter 8, 1–4 having completed the conversion of each incoming dummy signal, outputs to the processor 7 a Ready signal, according to which the latter samples the information in the form of a digital binary code and sends it to a specific memory cell of the operating memory block 9. The address of the memory cell is rigidly tied to the number of the output bus of the decoder, and, consequently, to the sensor from which information comes. After the last sensor has been polled, the processor 7 issues to the control unit 10 a signal for switching off the first switching unit and a signal for switching on the second switching unit, etc. The number of sensors connected to one switching unit and the number of switching units connected to one analog-to-digital converter is practically unlimited. The transfer of information from one switching unit to the analog-to-digital converter, regardless of the number of sensors, is carried out via three communication channels. An invention of an analog signal input device comprising sensors, communication channels, a processor, and an analog-to-digital converter and associated memory unit associated therewith, in order to simplify the device by reducing the number of communication channels, switching units are introduced, each of which contains a master pulse generator, a pulse counter whose input is connected to the generator output, a decoder whose inputs are connected to the counter outputs, keys whose control inputs are connected to the output the decoder, the inputs are connected to the sensors, and the outputs are combined, the control unit associated with the processor, the combined outputs of the keys are connected by the first communication channels to the input of the analog-digital converter, the outputs of the master oscillators are connected by the second communication channels to the start input of the analog-digital converter, the outputs of the control unit are connected to the power input of the switching units by third communication channels., Sources of information taken into account in the examination 5 1. Logical layout of systems based on percents M-row-M bOOO ASVT, RTM.NII UVM, Syeverodonets'k, 1572. 2. Layout of analog input systems. Instructions NII UVM, Severodonetsk, h. L-u, IS p. 6572, FIG. 5-1, 5-2, (prototype). f2 // t3 R iCI-J