SU1667011A1 - Device for automatic control of technological parameters - Google Patents

Abstract

The invention relates to the field of automation, in particular, to devices for adjusting technological parameters. The purpose of the invention is to expand the functionality by providing the formation of additional regulatory signals when the sensor parameter changes abruptly. The device contains a generator of linearly varying voltage, a sensor and a parameter setting device, five AND-NOT elements, five comparators, two power amplifiers, an integrator and two unilateral conductivity elements. When the sensor parameter changes abruptly, the device generates additional control signals of a certain duration, which are fed to the actuator. 3 il.

Description

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The invention relates to automation and can be used to regulate technological parameters, for example, in non-ferrous metallurgy.

The purpose of the invention is to expand the functionality by providing the formation of additional regulatory signals when the sensor parameter changes abruptly.

FIG. 1 shows a block diagram of the device; in fig. 2 is a timing diagram of the output signals of its elements; FIG. 3 is a waveform of the signals at the outputs of the comparators depending on the difference of the signals at their inputs AU UBXHH -Uoxnp

The device contains a generator of linearly varying voltage, a sensor 2 and a parameter setting device 3, the first and second comparators 4 and 5, the first second, third, fourth and fifth elements AND-NOT 6, 7, 8, 9

and 10, the first and second power amplifiers 11 and 12, the actuator 13, the driver 14, containing the third comparator 15, the first and second elements of one-sided conduction 16 and 17, the first and second current supplying resistors 18 and 19, the operational amplifier 20, the capacitor 21, the fourth and fifth comparators 22 and 23. Operational amplifier 20, capacitor 21, current-setting resistors 18 and 19 form an analogue integrator 24. Generator 1 is connected to the inverse inputs of the first 4 and second 5 comparators, the direct inputs of which are connected to the sensor outputs 2 and 3, respectively, and the set point, the output of the first comparator is coupled to the first inputs of the first 6 and second 7 AND-NO elements, and the second - to the second inputs of the first 6 and 8 of the third AND-NO elements, wherein the second and the dogs

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the inputs of the second and third elements of the NAND, respectively, are associated with the output of the first element of the NAND, and the outputs are connected to the second inputs of the fourth 9 and the fifth 10 elements of the NAND, respectively.

The inputs of the first 11 and second 12 power amplifiers are connected to the outputs of the fourth and fifth NAND elements, respectively, and the outputs are connected to the actuator 13, the output of the parameter sensor connected to the inverse inputs of the third 15 and fourth 22 and the direct input of the fifth 23 comparators, the direct input of the third comparator is connected to the output of the operational amplifier 20, the capacitor 21, and the direct and inverse inputs of the fourth and fifth comparators, respectively, the output is connected to the common output of series-connected elements of one side conduction 16 and 17. The free terminals of elements 16 and 17 are connected to current-supplying resistors 18 and 19, which are connected to the capacitor 21 and the inverse input of the operational amplifier whose direct output is grounded, the outputs of the fourth and fifth comparators are connected to the first inputs of the fourth and n addition of elements AND, respectively

The device works as follows.

From the output of generator 1 to the combined inputs of comparators 4 and 5, the linearly varying voltage Ui flows. When the voltage changes from the minimum to the maximum value, depending on the ratio of the signals of the sensor U2 and setpoint W, the comparators 4 and 5 change their state. In this way, the signals 1Ы and Us are formed, which logically add up to the elements AND-HE 6, 7, 8 and through the elements AND-HE 9 and 10 are fed to the inputs of amplifiers 11 and 12, from the outputs of which. arrive at the actuator. The actuator acts on the output signal of the parameter sensor through the process.

Consider the case where the sensor parameter U2 is hopping. Due to the zero offset of the comparators 22 and 23 in the initial state, the outputs of these signals are logical 1. When the U is positive, the signal of logical 1 remains at the output of comparator 23, and the logical signal O at the output of comparator 22 is regulated by the current-supply resistor 19 With a negative U2 jump, the signal of the logical G will remain at the output of the comparator 22, and the signal of the logical signal O, the duration

which is controlled by the current-delivering resistor 18. Thus, at the outputs of the comparators 22 and 23, depending on the jump sign, control signals of a logical O of a certain duration are formed, which are fed through the inputs AND-HEY 9 and 10 respectively to the inputs of the amplifiers 11 and 12, from the outputs of which actuating mechanism.

Thus, the device generates additional control signals with an abrupt change in the sensor parameter, which, with an appropriate choice of coefficients determined by current supply resistors, eliminates the overshoot process.

Claims (1)

Claims An apparatus for adjusting technological parameters, comprising a generator of linearly varying voltage, a sensor and a parameter setting device, the first is the NAND unit, the first and second power amplifiers, and the first and the second comparators connected by inverse inputs with the generator output of a linearly varying voltage, the direct inputs with the outputs of the sensor and the parameter setting device, respectively, the output of the first comparator is connected with the first inputs of the first and second elements AND-NOT, and the output of the second comparator with the second the input of the first and the first input of the third element is NOT the output of the first element, -) I-NOT is connected to the second input of the third and second elements of the IS-NOT, the output of the latter is connected to the first input of the fourth element of the AND-NO, the outputs of the power amplifiers are outputs of the device that are different from the fact that, in order to expand the functionality of the device due to the formation of additional regulatory signals when the sensor parameter changes abruptly, a third, fourth and fifth comparators, an analog integrator and serially connected elements of a one-sided drive are inserted into the device allowances whose free conclusions connected to the inputs of the integrator, and the common output is connected to the output of the third comparator, the output of the parameter setter is connected to the inverse inputs of the third and fourth comparators and the direct input of the fifth comparator, the direct input of the third comparator is connected to the output of the analog integrator, the direct input the fourth comparator and the inverted input of the fifth comparator, the output of the third element AND-NOT is connected to the first input of the fifth element AND-NOT, the outputs of the fourth and fifth comparators are connected to the second inputs of the fourth and n second AND-NO elements, respectively, the output of each of which is coupled to the input of the respective power amplifier. 1 + uU figs