SU1290256A1 - Maximum selector - Google Patents

Abstract

This invention relates to automatic control and can be used to control several parameters with a single controller. The purpose of the invention is to increase the reliability and quality of regulation. This is achieved by having a maximum selector, each of whose N channels contains inverting and non-inverting amplifiers connected to the inputs, two AND elements, two RS-flip-flops, two keys, the outputs of the first and second AND elements being connected respectively to the S-inputs of the first and of the second RS-flip-flops, non-inverting outputs of which are connected to the corresponding keys of the actuator, and a common for all channels adder, two additional optrons, two NOT elements, two NOT-OR elements, two differentiating RC circuits pi, where the outputs of the inverting and non-inverting amplifiers are connected to the first inputs of the first and second optocouplers, respectively, whose outputs are connected to the first inputs of the corresponding AND elements, and the other 2N-1 inputs are connected to the NOT elements that invert the output signal of the optocouplers of the remaining N-1 channels, respectively, the second outputs of the optocouplers are connected through a series-connected adder to the point of zero potential, the outputs of the first and second: non-OR elements are connected to R via series-connected RC circuits - to the input of the first and second RS-flip-flops, respectively, and the inverting outputs of the RS-flip-flops are connected to the inputs of the logical elements NOT-OR. 1 il. S (L S k S) About fC

Description

The invention relates to automation and computer technology and can be used to regulate several parameters with a single controller.

The aim of the invention is to improve the reliability and quality of regulation by using the output signals of inverting and non-inverting amplifiers.

The drawing shows a diagram of the allocator.

The circuit includes inverting and non-inverting amplifiers 1; and 2 ;, optocouplers 3; and 4; , items are NOT 5; and 6; , Elements And 7, - and 8, Elements Not-Or 9; and 10 ;, differentiating KS-p.epi 11; and 12 ;, RS-flip-flops 13; and 14-, keys 15; and 16 ;, adder 17, controller input 18.

The device operates as follows x).

Suppose that a positive polarity signal is received at the input of the first channel, greater in magnitude than the signal at the input of the second channel. Then the output signal from the output of the non-inverting amplifier 1I will turn on the receiving part of the optocoupler 3. and turn off the optocouplers of the second channel, since Ug, Ugj (. At the input of the adder 17, the maximum signal is given, which will be fed to the input 18 of the controller. At the same time, the transmitting part of the switched on optocoupler 3 (generates a signal of the logical unit that goes to the first input of the element And 7, and the inverter 5, Through the elements 7 and 8, it sets a logical zero signal on the S-inputs of the RS-flip-flops of the second channel, and from the output of the off optocouplers 3 and 4, the signals of the logical zero, inverted by inverters 5 and 6, go to the other inputs of the And 7 element, the signal of the logical unit from the output of the AND 7 unit sets the trigger 13 into one state and turns on the key of the actuator 15. At the same time, the logical zero signal from the inverting output of the RS flip-flop 13 is fed to the inputs of the elements NOT-OR 10 ,, 9, Yu and through serially connected RC circuits pi 12, llj, 122 sets the other RS flip-flops 14, 13, 14 to the zero state, since the S-input has a logical signal

who has zero, and at the R-input - a pulse of a logical unit, formed by an RC-circuit, and the keys 16 ,, 15, 16 will be turned off.

 A further increase in Ug ,,, will not change the state of the logical unit at the output of the optocoupler 3 | .

Now suppose that the voltage Ugy ,, of age, is compared with the voltage Ug, then the optocouplers 3I and 3 will turn on simultaneously. The inverted 5-signal of the included optocoupler 3 through the element U 7 (arrives at the S input of the RS flip-flop 13, which retains its one state, because the R and S inputs of the RS flip-flop 13 contain signals of logical zero and, therefore The keys of the actuators do not change their state.

If the voltage Ug exceeds the value of the input signal Up, v. the optocoupler 3 will close so

BX, as a quantity

5 0 0

five

0

five

the voltage at the anode of the receiving part LED. The optocoupler 3 will not be sufficient to open it due to the increase in the voltage at the cathode of the led of the optocoupler part connected to the input of the adder 17.

The signal of the logical zero from the output of the optocoupler 3f through the inverter 5 connected in series and the element And 7, on the remaining inputs of which the signals of the logical unit are present, sets the RS flip-flop 13 into one state. The signal from the non-inverting RS-flip-flop input 13, turns on the actuator's IS key, and from the inverting output of the RS-flip-flop 13, the logical zero signal is fed to the elements NE-SH1I 9 ,, lOj, lOj T1 through serially connected RC circuits 11, 12 ,, 12 sets the RS flip-flop 13, and keeps the RS-flip-flop 14, 14 in the zero state, thereby turning off the key 1 5.

When the number of channels is greater than two, the processes are similar. If the input signals And have a negative polarity, then instead of a non-inverting amplifier, one should consider the corresponding inverting amplifier. Otherwise, the processes occur in the same way, without creating conditions for uncertainty in the key management of the actuator and violation of the algorithm of the proposed allocator.

Thus, the proposed maximum selector provides simultaneous and reliable activation of the key of the actuator and the selection on the adder of the absolute value of the maximum signal in a wide range of input signals. In addition, when two or more input signals enter the dead band of the keys, the key that was turned on before that remains on. The remaining keys remain disabled.

In addition, the device makes it possible to improve the quality and reliability of regulation in systems with intermittently closing circuits, which will make it possible to increase the number of objects serviced by one controller in connection with expanding the range of input signals and improving the quality of regulation.

Claims (1)

Invention Formula Maximum selector, each of whose N channels contains inverting and non-inverting amplifiers connected to the inputs, two And elements, two RS-flip-flops, two keys, and the outputs of the first and second elements 0 five 0 five Both are connected respectively to the S-inputs of the first and second RS-flip-flop, non-inverting outputs of which are connected to the corresponding keys of the actuator, and an adder common to all channels, characterized in that, in order to increase the reliability and quality of regulation by using the output signals of the inverting and non-inverting amplifiers, additionally introduced two optocouplers, two elements NOT, two elements NOT-OR, two differential) emitting KC-circuit, and the outputs of the inverting and non-inverting amplifiers are connected to the first input of the first and second opto-switches, respectively, whose outputs are connected to the first inputs of the corresponding AND elements, and the other (2 N-1) inputs of which are connected to the NOT elements, which invert the output signal of the other (N-1) channels, respectively, the second inputs The optocouplers are connected via a series-connected adder to the point of zero potential, and the inverting outputs of each RS flip-flop are connected to the input of each element NOT-OR, except the element NOT-OR connected to the output via a differentiating RC circuit with an R-input th trigger.