SU1392157A1 - System for automatic control of thread heating temperature - Google Patents

Abstract

This invention relates to automatic devices for multichannel control and temperature control. The aim of the invention is to improve the accuracy of regulation. The system contains, in each control channel, a temperature sensor 1 installed in the tubular heater 3 of the moving thread, connected to the corresponding bridge circuit of the measuring unit 4.

Description

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rhenium, and the electric heating element 2, associated with the output of the corresponding heating regulator 7. The control signals from the program control and control unit 5 are fed to the input of the shift register 6, the outputs of which alternately form single signals that are fed further to the input of the corresponding logic element AND 8, if there is a gate signal at the control input, the corresponding analog key 9. As a result, from the corresponding output of the unit 4 measurements, associated with the information input of the open analog key 9, to the input of the additional analog key 10 is fed and formational signal to the analog input key signal 10 supplied from the common output measurement unit 4, and a control input - The inhibitory stro- signal. The output signal from the additional analog switch 10, corresponding to the temperature value in the controlled channel, is fed to the input of the buffer operating amplifier 1 and after amplification and conversion by the analog-digital converter. 12 is fed to the input of the program control unit 5, where it is processed and the deviation of the temperature value from the predetermined control signal is generated. The output signal of the program control and control unit 5 goes further to the shift register 6, from the outputs of which the control signals are fed to the inputs of the corresponding heating controllers 7. 1 il.

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The invention relates to automatic devices for multichannel control and temperature control and can be used in the production of chemical fiber and other industries with identical technological processes.

The purpose of the invention is to increase the accuracy of regulation.

The drawing shows a block diagram of the proposed system.

The system contains a temperature sensor 1 and an electrical heating element 2 installed in each control channel, placed in a tubular heater 3 of a moving chemical thread, a measurement unit 4 with bridge measuring circuits by the number of channels, a program control and control unit 5, a shift register 6, controllers 7 heating, logic elements AND 8, analog switches 9, additional analog switch 10, buffer operational amplifier 11 and analog-digital converter 12. In each control channel temperature sensor 1 The key to the respective bridge measuring circuit measuring unit 4, and the electric heating element 2 is bonded with you swing the respective heating regulator 7. The output of the software monitoring and control unit 5 is connected to the input of the shift register 6, the outputs of which are connected to the corresponding inputs of the heating controllers 7 and logic elements AND B. The information inputs of the analog switches 9 are connected to the corresponding information outputs of the measurement unit 4 connected to the signal outputs of the corresponding bridge measuring circuit, the control inputs are connected to the corresponding outputs of logic gates And 8, and the outputs of the analog switches 9 are combined and connected to the first input of the additional Analog key 10, the second input of which is connected to the common output of the 4 measurement unit associated with the common pins of the bridge measurement circuits. The input of the control unit 5 is connected via an analog-digital converter 12 to the output of the buffer operational amplifier 11, the inputs of which are connected to the corresponding outputs of the additional analog switch 10. The output of the strobe of the program control and control unit 5 is connected to the control inputs of logic gates And 8 and additional analog key 10.

A microprocessor device can be used as the software control and monitoring unit 5.

The system works as follows.

The control signals from the outputs of the program control and control unit 5 are fed to the inputs of the shift register 6, as a result of which the output signals are alternately formed at its outputs corresponding to the logical "1" value, which are fed to the input of the corresponding logic element 8. At the same time, in accordance with A certain combination of control signals from the output of the gating unit 5 of the program control unit controls the control input of the logic element AND 8 to receive a strobe signal. As a result, that logical element AND 8 is triggered, to both inputs

: 1., and

The signals of the program control and control unit 5 are then fed to the shift register 6, from the outputs of which are fed to the inputs of the corresponding heating controllers 7.

which signals are given its logical output signal opens the corresponding analog key 9. Since the outputs of the block 4 of measurements are connected with the information inputs of the corresponding analog switches 9, then when one of them triggers from its output combined with the outputs of the others, the information signal It is fed to the input of an additional analog switch 10, to the analog input of which a signal is simultaneously supplied from about 10 chemical fibers, containing in each output of the 4 measurement unit, and at the control channel, the temp sensor control input - signalratury gate connected to the bridge measuring circuit measuring unit and an electric heating element connected to

Claims (1)

Invention Formula The system of automatic control of the heating temperature of the filaments in production from the output of gating block 5 programs a lot of controls:; management As a result, the analog switch 10 opens and at its outputs a signal is generated corresponding to the value of the temperature in the controlled channel, which is fed to the inputs of the buffer operational amplifier 11 and after amplification 15 a heating controller, as well as a buffer operational amplifier, connected by means of an analog-digital converter to the input of a software control and control unit, characterized in that, in order to increase the control accuracy, it is converted into an analog digital code 20 "and equipped with a shift register and according to the number of a digital converter 12. channels of regulation by logic elements And and analog keys, as well as an additional analog key, with the shift register inputs connected to the corresponding outputs of the program block monitoring and control, and the outputs are connected to the inputs of the corresponding heating controllers and logic elements AND, the information inputs of the analog switches are connected to the corresponding information outputs of the measurement unit, the control inputs connected to the outputs of the corresponding logic elements AND, and the outputs are combined and connected to the first input of an additional analog switch, the second input of which is connected to the use of an additional analog switch 10 in the system, which combines information signals common conclusions of block 4 measurements, as well as shift register 6, logical elements I 8 and analog switches 9, which play the role of switches and have identical parameters, as well as providing high-precision matching of the internal resistance of the signal source and attenuation by the buffer operational amplifier 11 of the common-mode component of the signal, allows you to reduce the effects of interference and interference on the measurement results. From the output of the analog-to-digital converter 12, a digital code is entered into the software control and control unit 5, where it is processed — the calculation of the average temperature in each channel, the deviation from the set value 25 thirty 35 The output of the measuring unit, the outputs are connected to the corresponding inputs of the buffer operating amplifier, and the control inputs of the logic elements And and the additional analog key are combined and connected to the strobe output, the deviation is beyond the reference from the 40 program control unit and the alarm is generated. Output control The signals of the program control and control unit 5 are then fed to the shift register 6, from the outputs of which are fed to the inputs of the corresponding heating controllers 7. 10 of chemical fiber, containing in each control channel a temp sensor of chemical fiber, containing in each control channel a temp sensor Formula of the invention The system of automatic control of the heating temperature of the filaments in production a heating controller, as well as a buffer operational amplifier, connected by means of an analog-digital converter to the input of a software control and control unit, characterized in that, in order to increase the control accuracy, the control register has a shift register and the number of control channels The output of the measuring unit, the outputs are connected to the corresponding inputs of the buffer operational amplifier, and the control inputs of the logic elements And and the additional analog switch are combined and connected to the output of the strobe