RU1772784C - Device for automatic control of drive - Google Patents

Abstract

The invention relates to instrumentation and can be used in control systems. The purpose of the invention is to simplify the design and expand the functionality by indicating the location of the slider. The goal is achieved due to the fact that a potentiometer 4, a pulse generator 8, an element And 9, a counter 10, a digital-to-analog converter 11, the first 12 m, the second 16. krmpz are introduced into the device; speakers, RS-flip-flop 13, subtraction unit 14, indicator 15 and control pulse generator 17. 4 ill.

Description

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The invention relates to instrumentation and can be used in control systems, for example, devices / directional crystallization.

A drive with a rotary movement is known, comprising a reversible motor coupled through a gearbox with a threaded spindle, on which a slider is mounted by means of a threaded hole to move in a rack with a slot and having a plug at the end opposite the threaded hole that acts on the direction switch rotation of the engine (1).

The closest in technical essence to the claimed is a mechanism for automatically turning off the drive, comprising a control signal generating unit, an electric motor coupled through a gearbox with a spindle-screw with a slider mounted on it, paired with a guide, switches located on the slider and stops, the guide being made in the form of a hollow cylinder, inside which a spindle-screw is placed, ring stops connected to the drive gear of the control drives are mounted on the cylinder with the help of a thread (2 )

The disadvantage of the device is, firstly, its structural complexity and low manufacturability, caused by the need to thread on the surface of a hollow cylinder, in annular stops and on their surface, $ also is the difficulty of manufacturing drive gears, especially pg) and their considerable length: secondly, pan reduction of the roar by 1 on the slider, which is in motion, increases the likelihood of searching for supply wires, which, in general, excludes the reliability of the design. In addition to i о, the device does not allow controlling the location of the slider (about five passed) during the Kowxe construction.

The purpose of i-Oretoni is to simplify the design and expand the functionality by indicating the location of the slider.

This goal is achieved in that the R device dp is automatically controlled by the drive, comprising a control signal generating unit, and an electric motor connected to its output. r products, staozls:; nyyna wa uelekodvigateg spinner -.olo screw connected to the gears mounted on the spindle-: insert the guide to which the slider is connected, a potentiometer is additionally introduced, which is connected via the input / output with a spindle, a spindle screw, a pulse generator, an AND element, a counter, a digital-to-analog converter, a first comparator and an RS-trigger connected in series

a subtraction unit and an indicator, as well as a second comparator and a control pulse shaper connected in series, the output of which is connected to the input of the control forming unit

signals, and the second input - to the output of the first comparator, the second input of which is connected to the middle output of the potentiometer, to the first inputs of the subtraction unit and the second comparator, the second inputs of which are connected respectively to the outputs of the digital-analog converter and the reference voltage source, RS-trigger output connected to the second input of the And element, and the R-input to the input of the counter installation in the initial state and to the Reset bus, the potentiometer is connected to the power source by two terminal leads.

In FIG. 1 shows a design of a device; in FIG. 2 - its functional

scheme; Fig. 3 is a voltage diagram illustrating the operation of the device; in FIG. 4 is an electrical schematic diagram of a control pulse shaper, A device for automatic control of a drive comprises a control singal forming unit 1, an electric motor 2 connected to its output, a gear 3 mounted on the shaft of an electric motor 2, a potentiometer A, a co-axis through a gear 3 connected to the spindle -screw b, slider 6 mounted on screw spindle B, guide 7, with a cogged creep G, serially connected pulse generator 8, element 9 AND, counter 10, digital-to-analog spruce 11, the first comparator 12 and the RS flip-flop 13, are connected in series; le the subtracting unit 14 and the indicator 15, as well as followed by the E. NCO connected the second comparator 16 and the driver 17 of the control pulses, the output of which is connected to the input of block 1, the second input - to the output of comparator 12, the second input is expensively connected to the middle output of the pogoniometer 4, to the first inputs of block 14 and comparator 16, the second :: of which are connected to the outputs of the digital-analog converter 11 and the reference voltage source (shown), RS trigger output 13 p Connected to the second input of element 9, and the R-input to the input of setting counter 10 to the initial state and to the Reset bus, potentiometer 4 is connected to a power supply (not shown) by two terminal leads.

The device also contains a crucible 19 with a molten metal located in the mold 18 (the remaining structural elements of the mold 18 are not shown in FIG. 1) and a dressing 20 fixed at the slider 6 with one end and the crucible 19 inserted into the hole in the bottom.

Claims (1)

 In addition, the driver 17 of the control pulses contains elements 21. 22, 23 OR, element 21 AND, the inputs of which are connected to the outputs of elements 21, 22, 23, and the Bus Hood and Reverse (devices that generate signals on the buses, in Fig. 4 not shown), moreover, the first inputs of the elements 21, 22 are connected respectively to the reverse and exhaust buses and to the inputs of the element 23, and their second inputs are respectively the first and second inputs of the driver 17, the output of the element 24 is the first output of the driver 17, and the tires are Retract and Reverse - respectively its second and third m exits. SUMMARY OF THE INVENTION A device for automatically controlling a drive, comprising a control signal generating unit, an electric motor connected to its output, a gearbox mounted on the motor shaft, a screw connected to the gearboxes, a slider mounted on a spindle-screw, a guide with which the slider is connected, characterized in that, in order to simplify the design and expand the functionality of the an indication of the location of the slider, a potentiometer is additionally introduced, the axis of which through the gearbox is connected to the spindle screw, the pulse generator is connected in series, the element And, a counter, a digital-to-analog converter, a first comparator and an RS flip-flop, series-connected subtraction unit and indicator, as well as series-connected second comparator and control pulse generator, the output of which is connected to the input of the control signal generation unit, and the second input is to the output of the first comparator, the second input of which is connected to the middle the output of the potentiometer, to the first inputs of the subtraction unit and the second comparator, the second inputs of which are connected respectively to the outputs of the digital-to-analog converter and the reference source voltage, the output of the RS-flip-flop is connected to the second input of the And element, and the R-input is connected to the input of setting the counter to its initial state and to the Reset bus, the potentiometer is connected to the power supply by two terminal outputs Figs Ј OP fig.Z FIG 4