SU1098000A1 - Number-pulse device for solving problems of automatic weighing and metering - Google Patents

Abstract

A NUMBER-PULSE DEVICE FOR SOLVING AUTOMATIC DOSING TASKS, containing the first AND element whose output is connected to a counter input of the counter, the bit inputs of which are connected to the outputs of the corresponding AND elements of the first group, the first inputs of which are a group of information inputs of the device, the second And element, The first reversible counter, the discharge bits of which are a group of information outputs of the device, the first input of the first element I being the first clock input of the device, distinguishing In order to simplify the device, it contains a pulse shaper, a second group of elements AND, a second reversible counter, third, fourth and fifth elements AND, the first and second elements NOT, the first, second, third and fourth frequency dividers and a decoder zero the output of which is connected to the second input of the first element I, the input of the first element NOT and the first input of the third element I whose output is connected to the first input of the second element I whose output is connected to the input of the first frequency divider, the output of which is connected to the input of the second frequency divider and summing the input of the first reversible counter, the subtraction No. 1 input of which is combined with the input of the third frequency divider and connected to the output of the fourth frequency divider, the input of which is connected to the output of the fourth element The first input of which is connected to the output of the fifth element AND whose first input is combined with the input of the second element NOT, the input of the pulse former and is the second clock input of the device, the second inputs of the second and fourth elements AND are the third clock input of the device CO, the outputs of the first and second elements are NOT connected to the second inputs of the third and fifth elements, respectively, and the outputs of the second and third frequency dividers are connected respectively to the summing and subtracting inputs of the second a down counter, the outputs of the bits of which are connected respectively to the first inputs of AND gates of the second group, kot9ryh outputs respectively connected to the inputs of the bits of the first down counter, the output pulse shaper connected to the second inputs of AND gates of the first and second groups.

Description

The invention relates to computing technology and can be used in instrument engineering in systems and devices when performing mathematical operations, for example, for synthesizing complex mathematical functions in automatic dosing systems for blended materials in the steel industry. A number-pulse solver is known that implements integration according to the formula of rectangles, contains a V-register, a jay (t) increment counter, a line of transfer valves controlled by pulses lH (1), and an R-registrar operating in parallel summation mode . The group of outputs of the V-register is connected to the group of inputs of the transfer valve line, the group of outputs of which is connected to the group of inputs of the P-register. The input of the Y-register receives a stream of increments (t), and the transfer stream 4X (t) is fed to the input of the line of transfer valves. The overflow pulses of the R-register form the output stream of the increments / iZ (t), which, entering the increment counter dZ (t), form the function Z (t) $ v (1) dX (SP "And the disadvantage of the known devices is the limited scope of its application in solving a block of complex problems, including, in addition to the intrusion operation, arithmetic evaluations. This problem arises when regulating technological processes, for example, in automatic dosing of charge materials in ferrous metallurgy to obtain a control signal that provides sets the material consumption value, it is necessary to allocate the mismatch between the given and actual component consumption value and add this mismatch with a value proportional to the integral of it, and it should be possible to change the coefficients with the terms and learn the mismatch sign. can only be combined with other devices, which greatly complicates the automatic metering system and thereby reduces the reliability and increases its value. A pulse-number decider is known for obtaining a digital code proportional to the integral of a complex function, containing two counters, a trigger, two AND elements, an OR element, a group of AND elements, a shift register, the output of the first And element being connected to the input of the first counter, the element output. OR is connected to one of the trigger inputs, a single output of which is connected to the first input of the first element AND, the second input of which is the first input of the device, the output of the second element AND is connected to the input of the second counter, g A group of inputs is connected to the outputs of a group of elements AND whose groups of inputs are groups of device inputs and the groups of outputs of the first counter are groups of device outputs whose outputs of the second and third bits of the shift register are respectively connected to the second input of the second counter and the input of the group of elements AND , the output of the fourth register bit is connected to the second output of the trigger, the single output of which is connected to the second input of the second element AND, one input of the OR element and the second input of the first counter cheny to the third input device, the second input of the OR gate is connected to the output of the second counter, the input of the first discharge register and its timing are input respectively the fourth and fifth inputs of the device f 2. The apparatus operates as follows. The signal arriving at the third input of the device is reset to the first counter, and at the same time this signal arrives at the input of the OR element and sets the trigger to the zero state. The zero level from the trigger output closes the AND elements for the passage of pulse sequences and fj, arriving respectively at the first and second inputs of the device, at the counting inputs of counters. With the arrival of a frequency pulse -,, the period of which sets the integration step to the fourth input of the device at the output of the first. bit shift register appears a single level that is shifted to the right by the frequency

f arriving at the fifth input of the device. The signals from the shift register outputs produce the following sequence of operations: resetting the second counter; writing code N to the second counter; setting the trigger to one state.

The pulse sequences {and pass through the open ones with the unit level from the output of the trigger element AND to the counting inputs of the counters. The first counter operates in the pulse addition mode, the second counter in the pulse subtraction mode. The transfer signal of the second counter. Through the OR element sets the trigger to the zero state, thus closing the elements for passing the pulse sequences f and f. Thus, the output code after performing the operation cycles of the device will be

-ZN,

lli

6MH

2

eleven

A disadvantage of this device is its limited scope, for example, in solving problems associated with the development of control actions in control systems, i. In this case, this device though may be an integral part of the control system, as an integrator function with a tunable constant time (the ratio,. „can be taken as a constant time), however, to build, for example, a proportional-integral controller, this device must be supplemented by a device audio, an adder, a multiplier, and in addition, provide for an integration taking into account the mismatch between the target mark and the actual value of the controlled variable. For a dosing system for batch materials, for example, in sintering production, it is necessary to introduce a correction in physicochemical composition (for coke, correction in moisture and ash content is necessary). A correction in the physicochemical composition can be introduced by dividing the specified value of the consumption of certain components of the component by the relative content of these components in the component (for coke this component is carbon, for ore components iron, etc.), thus, in the indicated In addition, it is necessary to additionally have a dividing device, which complicates the device.

The aim of the invention is to simplify the device.

The goal is achieved by the fact that the device containing the first AND element, the output of which is connected to the counter input of the counter, whose bit inputs are connected to the outputs of the corresponding AND elements of the first group, the first inputs of which are the group of information inputs of the device, the second And element, the first A reversible counter, the bit outputs of which are a group of information outputs of the device, the first input of the first element I being the first clock input of the device contains a pulse formatter, v I have a group of elements And, the second reversible counter, the third, fourth and fifth elements And, the first and second elements are NOT, the first, second, third and fourth frequency dividers and a decoder zero, whose code is connected to the second input of the first element And, the input of the first element NOT the first input of the third element AND,. the output of which is connected to the first input of the second element I, whose output is connected to the input of the first frequency divider, the output of which is connected to the input of the second frequency divider and the summing input of the first

0 is about a reversible counter, the subtractive input of which is combined with the input of the third frequency divider and connected to the output of the fourth frequency divider, whose input is connected to the output of the fourth And element, the first input of which is connected to the output of the fifth And element, the first input of which is combined with the second input the NOT element, the input of the pulse generator and is the second clock input of the device, the second inputs of the second and fourth elements of AND are combined and are the third clock input of the device, the outputs of the first and second elements They are NOT connected to the second inputs of the third, o, and fifth elements, respectively, the outputs of the second and third frequency dividers are connected respectively to the summing and subtracting inputs of the second reversible counter, the outputs of which bits are connected respectively to the first inputs of the elements of the second group, the KOTopbix outputs are connected respectively to the inputs of the bits of the first reversible counter, the output of the pulse shaper is connected to the second inputs of the AND elements of the first and second groups. FIG. 1 shows a functional diagram of the device; in fig. 2 is a functional diagram and a table of states of the pulse duration subtraction unit. The device contains a unit for subtracting pulse durations 1, elements AND 2-4, pulse shaper 5, frequency dividers (pulse sequences) 6 and 7, reversible counter 8, groups of elements AND 9, reversible counter 10, decoder zero 11, counter 12, group of elements And 13, frequency dividers 1D and 1, elements NOT 16 and 17, elements And 18 and 19. The device works as follows. A pulse-modulated pulse signal with a pulse repetition rate f- and a pulse duration fj is fed to the input of the pulse former 5, which forms a short pulse along the leading edge, opening groups of elements 9 and 13 to write the output code of the pulse counter 10 to the pulse counter 8 and code Ng in the pulse counter 12. The code from the output of the counter 12 is fed to the input of the zero state decoder 11, the logical level at the output of which corresponds to a logical one for any input code other than zero, and logical zero for zero code input. The frequency f is applied to one input of the And 2 element. , the second input is connected to the output of the decoder 11. Thus, the frequency from the output of the AND 2 element goes to the counting input of the counter 12, which operates in the countdown mode until the code at the output of this counter becomes zero. The pulse frequency at the output of the decoder 1t is equal to {., The leading edge of the pulses coincides with the leading edge of the pulse-width modulated pulse signal, and the duration is determined in the following way. The input width-modulated pulse signal and the signal from the output of the decoder 11 are fed to the input of the pulse duration subtraction unit 1. The basis of the pulse duration subtraction unit operation is the fact that if the beginning of two pulse signals coincides in time, the difference between the durations of these signals is equal to the duration Neither 1, O, or O 1, depending on which of the signals has a longer duration. Thus, the combination scheme shown in FIG. 2, subtracts the durations of the pulses, and depending on the sign of the difference, the signal appears at one or the other output. From the outputs of the pulse duration subtraction unit, the signals arrive at the inputs of the And 3 and 4 elements, the other inputs of which receive the frequency f. At the output of the elements AND the number of pulses in one period of the input width-modulated pulse signal, is determined as follows:, L () 1, - h if. where n is the number of pulses at the output of the IZ element; Uj - the number of pulses at the output of the element And 4. From the outputs of the elements And 3 and 4 signals through frequency dividers 6 and 7, 14 and 15 are fed to the inputs of the reversible counter 10 and through the frequency dividers 6 and 7 to the input 7 of the reversing counter 8. Counter 10 operates continuously. The code at the output of this counter is defined as follows. MilVirr5: f (i; -, (iij о К, к ,, „,, |. Where Ng is the code at the output of counter 10 to the beginning of the first cycle; i, j are the numbers of cycles; k.Kj are the division factors of frequency dividers 6.7 and 14.15, respectively. Writing a code from counter 10 into counter 8 occurs at the beginning of each cycle. The code at the output of counter 8 after the end of the jth number is f. 4,. () N, ((, tj ( j | OR I jr -Miil-r (;) FS N ...) J ui 1 with I (G (i 1 the technical advantage of this device in relation to the known is the ability to synthesize a rather complicated function, corresponding, for example, to control acting in proportion to in It is possible to enter information about the physicochemical composition of the components into the setting effect, which is necessary when dosing bulk materials, for example, in ferrous metallurgy (information about the relative carbon content of coke or iron in the ore components should be introduced into frequency form). In this case, the ratio and k is equal to the coefficient of proportionality, giving the effect, fjCj) is proportional to the relative content,. for example, carbon in coke, CaCr is proportional to the actual value of the component consumption. K is a constant integration time. This device can also be used in non-ferrous metallurgy, in the cement industry, food industry, etc., where continuous dosing of bulk materials with correction for physicochemical properties is used. The use of the proposed device simplifies the implementation of the law of regulation and the introduction of correction and impact, and thereby increases reliability and reduces the cost of implementation.

Claims (1)

NUMEROUS-PULSE DEVICE FOR SOLVING AUTOMATIC DOSING PROBLEMS, containing the first AND element, the output of which is connected to the counting input of the counter, the discharge inputs of which are connected to the outputs of the corresponding elements of the first group, the first inputs of which are _the group of information inputs of the device, the second element AND , the first reversible counter, the outputs of which are the group of information outputs of the device, the first input of the first element AND being the first clock input of the device, characterized by I mean that, in order to simplify the device, it contains a pulse shaper, a second group of AND elements, a second reversible counter, a third, fourth and fifth AND element, the first and second elements NOT, the first, second, third and fourth frequency dividers and a zero decoder whose output is connected to the second input of the first AND element, the input of the first element NOT and the first input of the third AND element, the output of which is connected to the first input of the second AND element, the output of which is connected to the input of the first frequency divider, the output of which is connected to the input of the second frequency divider and the summing input of the first reverse counter, the subtracting input of which is combined with the input of the third frequency divider and connected to the output of the fourth frequency divider, the input of which is connected to the output of the fourth element And, the first input of which is connected to the output of the fifth element And the first input is combined with the input of the second element NOT, the input of the pulse shaper and is the second clock input of the device, the second inputs of the second and fourth elements AND are combined and are the third by the device’s direct input, the outputs of the first and second elements are NOT connected to the second inputs of the third and fifth AND elements respectively, the outputs of the second and third frequency dividers are connected respectively to the summing and subtracting inputs of the second reversible counter, the discharge outputs of which are connected respectively to the first inputs of the elements AND of the second group the outputs of which are connected respectively to the inputs of the discharges of the first reversible counter, the output of the pulse shaper is connected to the second inputs of the elements And the first and second groups.