SU437049A1 - Automatic control of production process parameters - Google Patents

Description

one

The invention relates to automatic control and is intended for use in precision automatic control systems of various technological parameters.

Automatic process parameter controllers are known that contain a sensor whose output is connected to a measuring transducer via a programmable suppressor unit and a setter made in the form of stepper motors connected with sliders of series-connected potentiometers, an adjusting and an execution unit connected to the output of the measuring transducer through a unit programmable secondary setter, made in the form of a stepper motor, connected to the engine of a potentiometer, and a software control unit including a program setting circuit, an output pulse driver and a motor switchboard, by means of which one output of the program setting circuit is connected to the middle points of the windings of the stepping motors of the programmable suppressor and setting unit and the programmable secondary setting unit.

To simplify and increase the reliability of the device, its software control unit contains a control circuit for stepper motors, the input of which is connected to another output of the program setting circuit through the output pulse driver, and the output to the ends of the parallel-connected windings of the stepping motors of the programmable suppressor and setter and programmable secondary modules setting device.

The drawing shows a functional diagram of the described device. It contains a sensor 1, a programmable suppressor unit and a setpoint device 2, a measuring transducer 3, a software control unit 4, a control and execution unit 5, a programmable secondary unit 6 unit, suppressor potentiometers

and setting device 7 and 8, stepper motors of suppressor and setting device 9 and 10, stepper motor of secondary setting device 11, potentiometer of secondary setting device 12, program setting circuit 13, output pulse driver 14, motor switch 15, control circuit of step motors 16, output trigger 17 , keys 18, trigger circuit 19, triggers 20 and 21 and windings of stepper motors 22.

The automatic controller works as follows. Sensor 1, mounted on the object, senses and measures a signal proportional to the adjustable parameter, which is fed to the input of the measuring device.

devices 3. Consistently with the signal

Sensor 1 is fed to the input and signals are proportional to the level of suppression and parameter setting, taken from the sliders 7 and 8 of the suppression potentiometer and the setting of the emf suppressor unit. 2. The potentiometer motors 7 and 8, respectively, are connected and moved manually or automatically according to the program from the motors 9 and 10, while the current passes through the middle points of the control windings 22 in accordance with the commands coming from the program setting circuit. Software control can be performed on one (either) or both potentiometers 7 and 8, depending on the requirements of operation. With automatic (software) or remote manual control, command information is supplied from the software control unit 4. In the case of programming the subrange, the setpoint at the input of the measuring unit is in accordance with the level, speed and sign of the parameter being changed, the exposure time, the direction of tilt and the section number, in order switching sections and subbands of the signal in the form of pulses from the output triggers 14 of the channel for forming the output pulses through the control circuit 16 (consisting of a trigger circuit 19 and flip-flops 20, 21) are continuously applied to the ends of all the windings of a stepper motor. The signals when programming the suppress subbands are given in the same way. The signals for connecting the suppressing or setting subbands and turning on the electric motors into the working state (operation) are removed from the output trigger 17 and the switches 18 of the channel of the switch 15 and fed to the middle point of the windings 22 of the engine 9 or 10 channels to suppress or set the entire control and excitement circuit. engine. Depending on the number of pulses following for a particular engine, it processes the movement of the shaft and the potentiometer's engine at a certain angle with speed depending on the frequency of the pulses, thereby changing the magnitude of the suppression signal or the reference signal at the input of the measuring device 3. Vi6, / 20, less often / 4, etc., from the scale of suppression. If it is necessary to program a task at the output of the measuring unit 3, i.e., programming the task in even narrower limits, for example / iss, i / 256 and

etc. (depends on the type and gauges of the sensor and the limits of the input of the measuring unit, i.e., depending on the value of the parameter suppression ratio), to the output terminals

software control unit 4 instead of one of the channels suppressor emf. 2, a programmable secondary setter 6 is connected. Then the role of a programmable suppressor can be played either by the suppression channel

“Roughly, or the channel of the task” exactly at the input of the measuring unit. A non-programmable input channel can be controlled manually, or not put on a permanent unchanged value or turned off altogether (in

In this case, a modification of a single-channel programmable suppressor or master can be used. The programming process is similar to the previous cases.

Subject invention

Automatic control of production process parameters, containing a sensor,

the output of which is connected to the measuring transducer through a programmable suppressor unit and a setting device, made in the form of two stepper motors, connected to the sliders of serially connected potentiometers, an adjusting and actuating unit, connected to the output of the measuring transducer through a programmable secondary unit, made in the form of a stepping motor, a potentiometer connected to the engine and a software control unit, including the program setting circuit, the output driver and motor commutator pulse, whereby one output specifying circuit

the program is connected to the middle points of the windings of the pitch motors of the programmable suppressor and master and programmable secondary setters, characterized in that, in order to simplify and increase the reliability of operation, the software control unit contains a control circuit for stepper motors, the input of which through the output pulse driver is connected to another the output of the program's task scheme,

and the output - with the ends of parallel windings of the pitch motors of the blocks of the programmable suppressor and master and programmable secondary master.

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