SU1177680A1 - Digital device for controlling weighing portioning - Google Patents

Abstract

DIGITAL WEIGHT DOSING CONTROL DEVICE containing a moisture meter, weight sensors, a unit for setting the mass of a dose of material, a loading control unit, three pulse counters, two memory registers, a clock generator, RS trigger, seven elements AND, element OR, first switch and power source, characterized in that, in order to improve the accuracy of dosing due to monitoring the reliability of information received from the moisture meter, a third memory register, a synchronization unit, a frequency comparator, a digital comparator are entered into it op, basic humidity setting unit, six pulse counters, two counting triggers, multivibrator standby, two blocking nodes, four delay elements, digital display unit, second and third switches, the output of the synchronization unit being connected to the first input of the frequency comparator and the first input of the first element And, the second input of which and the second input of the second element And connected to the output of the frequency comparator, the second and third inputs of which are connected respectively to the first and third outputs of the generator clock pulses, the second output of which is connected to the third input of the second element I, the first input of which and the third input of the first element I are connected to the output of the first switch, the fourth output of the clock pulse generator is connected to the counting input of the first pulse counter whose output is connected to the input Record of the second the memory register and, through the first delay element, to the inputs of the first and second pulse counters and to the input of the generator of the clock pulse, the fifth output of which is connected to the input of the block is synchronized to the counting inputs of the third, 00 fourth, fifth, and sixth pulse counters and the second input of the third element, And the output of the first element, And connected to the summing, and the output of the second element, And to the subtractive inputs of the second pulse counter, the outputs of which through the second memory register They are connected to the inputs of the seventh counter, and the installation inputs are connected to the unit for setting the mass of the dose of material, the counting input of the seventh pulse counter and the second input of the fourth element I are connected to the output of the third pulse counter y

Description

the input of which and the first input of the fifth element And are connected to the output of the second switch connected to the input of the first switch, the third input of the fourth element And and the second input of the fifth element And connected to the output of the digital comparator, the group of inputs of which is connected to the output group of the moisture meter and to the group inputs of the fourth pulse counter, the output of which is connected to the counting input of the eighth pulse counter and the first input of the OR element, the output of which is connected to the third input of the fifth And element, the output connected to Recording of the fourth pulse counter, output of the fourth element AND connected to the input Recording of the third pulse counter, whose input group is connected to the output group of the base humidity setting unit, output of the seventh pulse counter is connected to the input Recording of the third memory register and through the second delay element to the inputs Record of the seventh and eighth pulse counters and the second input of the OR element, the output group of the eighth pulse counter is connected to the input group of the third memory register, the output group of which is The unit to the group of inputs of the sixth pulse counter, the group of outputs of which is connected to the group of inputs of the first memory register connected by the group of outputs to the group of inputs of the eighth pulse counter, the output of the fifth pulse counter is connected to the first input of the P5 flip-flop, the second input of the sixth element And and through the third delay element - to the counting input of the first counting trigger and inputs Record the fifth and sixth pulse counters output of the sixth pulse counter connected to the counting input of the second counting trigger, J) - and R-inputs

which is connected to the second output of the weight sensor, the third output of which is connected to the first input of the load control block, the first input of the device is connected to the 5th input of the first counting trigger and the third input of the load control block, the output of the first counting trigger is And, the first the input of which, the second input of the load control unit and the input multivibrator is connected to the output of the second counting trigger, the output of the multivibrator standby is connected to the first input of the seventh element And, out Which is connected to the first input of the first blocking node, the output of which is connected to the input Record of the first memory register, the output of the sixth element I is connected to the second input of the seventh element I and through the fourth delay element to the second input of the RS flip-flop, the output of which is connected to the first to the input of the third element I, the output of the second blocking node connected to the main input, the second input of which and the second input of the first blocking node are connected to a power source, the output of the second blocking node is connected to the counting input of nine pulse counter, the outputs of which are connected to the inputs of the digital display unit, input Reset the ninth pulse counter connected to the output of the third switch, the first input of which is connected to the first input of the first and second switches and connected to one pole of the power source, the second inputs of the first, second and The third switch and the D input of the first counting trigger are connected to the other pole of the power source, the first outputs of the weight sensor are connected to the inputs of the fifth counter, and the second input of the device is connected to the input m block synchronization.

one

The invention relates to the field of weighing equipment and can be used, for example, for the dosing of coke.

The purpose of the invention is to achieve accurate dosing.

The drawing shows a block diagram of the device.  The device contains a moisture meter 1, a weight sensor 2, a unit for setting the mass of the material dose, a unit for setting the base humidity, a loading control unit 5, a generator of 6 clock pulses, a synchronization unit 7, frequency O and digital comparators 9, nine counters 10-18 pulses, three registers 19–21 of memory, R5-trigger ger 22, two countable 1 triggers 23 and 24, seven elements AND 25–31, an IL element. 32, a standby multivibrator 33, two locking nodes 34 and 35, four delay elements 36 - 39, a digital display unit 40, three switches 41 - 43.  Conventionally, the device is divided into three blocks - blocks 44 -46.  The device works as follows.  The moisture meter 1 is mounted on a weighing hopper with a dosed material.  The weight sensor 2 consists of strain gauge transducers, fixed on a weight funnel, and an analog-digital converter (not shown).  In block 3 of the task for the mass of the material, the dose value is set. Jdj. calculated by the baseline humidity W, the value of which is set in block 4 of the reference humidity setting.  In digital comparator 9, a value is set, j.  corresponding to the upper limit of the range of change in the moisture content of the dosed material.  In the pulse counter 10, a value is set corresponding to, for example, the maximum permissible mass value of the material loaded into the weighing funnel.  The outputs of frequency 8 and digital 9 comparators and the output of counting D-Trigger 24 are output to signal the output of frequency f, the carrier, for example, information on the thermal state of the furnace outside the range, WOIKC, of the output of the NW-code corresponding to diapazonNWd g.  , and to signal that the mass of the material in the weight bin H has been reached, the calculated mass value is adjusted. this dose of DCK (signaling not shown).  All pulse counters are binary-decimal for ease of input, output, and visual display of information, although all the calculations remain true for the case of binary pulse counters.  Counters 12, 13, 17, and 18 pulses work on addition, counters 10, 14, 15, and 16 pulses — on subtraction; counter 11 pulses — in simultaneously the addition and subtraction of incoming pulses to the summing and subtracting inputs.  Memory register 19 and pulse counter 18 are powered by an autonomous source of power:; so that in case of a short-term supply voltage shutdown of the dosing system, the value of the flow of the previous cycle and the total material consumption should be kept.  Interlocking nodes 34 and 35 serve to block the signal flow immediately at the moment the power supply system voltage is turned off. Write to the transfer register and signal to the counting input of the pulse counter 18, thereby eliminating the possibility of interference.  After switching on the supply voltage of the dosing system, the blocking units do not remove the blocking.  Signal signals for the time required to exit to the mode of all functional units of the device, which eliminates the possibility of recording false information in the memory register 19 and in the pulse counter 18, where the total consumption of the dosing material is stored.  The proposed digital weight dosing control unit can be divided into three functional units: the dose mass correction unit 44, taking into account the frequency signal that carries information about the thermal mode of the blast furnace; unit 45 for adjusting the mass of the dose, taking into account the moisture content of the feed material and the base humidity, adopted in the calculations of the process and the loading program of the blast furnace; a unit 46 comparing the current value of the mass of the loaded material with the corrected value of the mass of eEy, determining the pouring and generating signals to control the loading of the weighing bin.  The task of the first functional unit 44 is to correct the magnitude of the given mass of the base dose Dg, depending on the magnitude of the frequency signal characterizing the heating network of the furnaces, by + K% of the maximum mass of the loaded material Sd, when the frequency changes from 1MMN A device or a CCM introduces a frequency signal for adjusting the mass of the base dose, taking into account the thermal state of the blast furnace depending on many technological parameters, including the physicochemical composition of ovyh materials Sett constant load wa ore, ash coke and others. , and characterized, for example, by the silicon content in the cast iron.  If, for example, the silicon content in the iron is reduced in comparison with the target value, then the correction signal {should cause an increase in the mass of the dose by K%, if, on the contrary, the silicon content increases, then the mass of the dose should be reduced by K% in accordance with the changed with a variable frequency signal f, the correction frequency signal f can be manually set by the kiln master in the setting unit.  Functional block 44 implements the algorithm (t3 where Bg is the mass value of the base dose; mass value of the base dose corrected by the signal f; "cc is the maximum mass value of the material loaded into the weight bun; f, is the correction frequency signal.  The frequencies f and fj are selected from the following ratios; uf 100 is the minimum value of the correction signal clock frequency, Hz; - lower value of correction values,%; DK - correction range of change,%; l is the range of variation of the magnitude of the frequency correction signal, Hz.  The first functional unit 44 operates as follows.  The correction frequency signal f is fed to the synchronization unit 7, where it is synchronized by the reference frequency f, coming from the clock generator 6, in which also 1A1-0C frequencies equal to the limits of the range of the correction signal are generated.  Frequency comparator 8 is tested for frequency limits.  If the frequency {is within a predetermined range, then the output of frequency comparator 8 generates a signal of logical 1, allowing the frequency f to pass through the AND 25 element to the summing input of the pulse counter 11 and the frequency j from the generator 6 clock pulses through the AND 26 element to the subtracting input same pulse counter.  The frequency fj from the clock pulse generator 6 is fed to the counting input of the pulse counter 10 operating in the subtraction mode.  In order to avoid an error in the calculation, the necessary condition is to synchronize the frequencies p,,, 3 both in terms of the distribution of pulses in the time grid and in phase.  The appearance of the transfer signal at the output of counter 10 determines the beginning of the cycle of the dose mass correction block.  This signal records the D g result obtained in the previous cycle from the pulse counter 11 into the memory register 20 (in the very first cycle, when the dosing system is turned on, the result in memory register 20 will be incorrect).  The signal of the beginning of the cycle passes through the delay element 36 (for a time not exceeding the pulse duration fp) and is fed to the recording inputs of counters 10 and 11, recording the codes s of sensor 3, where the mass of the dose for the base humidity is set, and enters the generator 6 clock pulses to synchronize the frequencies f, f2, according to Laze, so that the indicated frequencies in each cycle of determining D BN begin to arrive at the counting inputs of counters 10 and 11 simultaneously.  Pulse counter 10 is a timer, setting the time for information to be collected into counter 11, this time is 1 –W. The code received in counter 11 at the end of the described cycle i is equal to,). - - ° {In each dosing cycle of the material, t. e.  during one loading of the weight bin, the values, tgt and therefore D do not change, but in order to increase the reliability, the value of Dg-f is determined not once per dosing cycle, but cyclically with a period equal to i.  c If the frequency of the signal f is outside the specified range, then the output of the frequency comparator 8 produces a logical O signal, which prohibits the passage of the frequencies f and f and the summing and subtracting inputs of the counter 11 pulses.  In this case, in the information counter 11, in time t is not dialed, therefore the value of the code D, t, is written to the memory register 20 with the arrival of a signal. e.  correction of dose mass by signal f.  not produced.  In the absence of a specialized device that issues corrections, the frequency signal or if it is faulty, the correction is turned off using the switch 41, the signal from the output of which acts similarly to the logic signal at the output of the frequency comparator 8, or the unit 3 specifying the dose mass, | a correction unit 44, connected to a group of inputs of a pulse counter 16, included in the second functional unit 45.  The task of the second functional unit 45 is the correction of the magnitude of the mass of the dose Dgj (previously corrected in the first functional unit 44 by the signal), taking into account the current moisture content of the material and the base humidity.  Functional unit 45 Realis algorithm -n - fl 1 - 0,01Wg. , ck- - «bn 1 - o, 01W, m DCK corrected dose mass value by signals f. W-. Wj; Wj is the base moisture of the material adopted in calculations of the blast furnace process,%; Wf - the current value of the moisture content of the material,%; overflow (metering errors) of the previous metering cycle.  1 - O. OlWfi The ratio nTvif can be passed in the form t - lOn-i - 1о Top1-n - the number of bits of binary-decimal counters 12 and 13.  The values and the n-t select the outcome of the We and V humidity task (A loWjf W "/, 1oWi NW ,.  , NWj, codes that come from the omer and block 4, assigning basicness and correspondence to Wj and g.  , for example, the humidity of Wj and Wj is accurate to one decimal point e comma, then t 1, ni 3.  j 5.5%, then NW 10, Wg 55.  When the expression takes in the VCD  i, -0.01 Wj NW.  The l-NMtfj / lo 10 is the priority of the block 45 S to the second functional block 45 pa as follows.  NW Code | corresponding to the humidity of the material loaded into the weight bin, from the outputs of moisture meter 1 goes to the inputs of the digital comparator 9, where the logical test is performed for the limit value NWjy, p If the current humidity value does not exceed the specified range, then the output of the digital comparator 9 will be output the signal is logical 1, otherwise the signal of logical O With the counters 12 and 13 of the pulses, the NW codes are converted respectively.  and WW, - at frequencies f and. .  .  The counting inputs of counters 12 and 13 receive the frequency f from the generator of clock pulses.  Each transfer signal of the counters 12 and 13 records the codes according to NW from block 4 of the reference humidity and N from moisture, measure 1, if the signal of the logical 1 is present at the output of the digital comparator 9.  As a result, at the outputs of the counters 12 and 13, pulse sequences are formed with frequencies of respectively 10 -NW, where 10 are the volumes of the binary-decimal counters t2 and 13.   The frequencies f and fg are fed to the counting inputs, respectively, of a pulse counter 16, operating in subtraction mode, and a pulse counter 17, working for addition.  To avoid the occurrence of an error in the calculation, the frequencies fi and fj are synchronized in phase so that these frequencies in each cycle of determining D (. C began to arrive at the counting inputs of the counters 16 and 17 at the same time.  For this, the transfer signal of the counter 16, associated with the frequency f, through the delay element 37 and the elements OR 32 and AND 29 is fed to the input Record counter 13.  At the same time, the transfer signal of the counter 12 (frequency 4) through the element And 28 is fed to the input Record counter 12, t. e.  in counters 12 and 13, the conversion of codes to frequencies begins simultaneously.  The appearance of the transfer signal of the counter 16 is the beginning of the cycle for determining the mass of the corrected dose b (.  .  This signal is used to record the DCK value calculated in the previous cycle, from the pulse counter 17 to the memory register 21 (in the very first cycle when turned on, the dosing system will not display the result in memory register 21).  The signal of the beginning of the cycle passes through the delay element 37 (for a time not exceeding the pulse frequency fp) and is fed to the recording inputs of counters 16 and 17, recording in them, respectively, the code from memory register 20 (calculated in the first function block 44) and the additional code dosing errors of the previous cycle 10-uN, from memory register 19 (obtained in the third function block 46), (L is the number of bits of all binary-decimal counters except 12 and 13.  The pulse counter 16 is a timer, setting the time for information to be collected into the counter 17, this time is the Code received in the counter 17 by the end of the described cycle Chr will be equal to 1-0, ОШг% H -Д 1-0.0- (W t . e.  is defined by the above formula.  Since at the beginning of cycle ii, the 10 -4N code was recorded in the pulse counter 17, during the time ig it first counts up to 10 (dMr) pulses to the full volume (until zeroing), and then the number of pulses Dpn equal to the difference in the number of pulses of frequency j, received at that time at the counting input of counter 17, and the magnitude of the mass of the previous filling of the previous block.  During one load of the weight bin, the DCK value remains constant, since the value of Dg does not change.  , calculated in the first function block 44, the value 4N, obtained in the third function block 46, as well as the moisture value W, - and Wg. .  However, the value of Dp is updated cyclically with period i in memory register 21 to increase the confidence.  If the material moisture value produced by the moisture meter exceeds the specified range, then a digital O signal is generated at the output of the digital comparator 9, which prohibits the passage of recording signals through the elements 28 and 29 to the counters 12 and 13 pulses.  In this case, the A / W and NW-codes are not recorded in counters 12 and 13, and the output frequencies of these counters are determined Since the frequencies and fj are equal,.   L5 „-4„.   The moisture correction W is not performed.  In the absence of a moisture meter or its malfunction, the correction for the current humidity is turned off by the switch 42, the signal from the output of which acts similarly to the logical signal at the output of the digital comparator 9.  The third functional unit 46 is designed to compare the calculated value of the corrected mass of the DCK dose with the current value of the material moisture mass M measured by the weight sensor 2, determine the mass of the overflow mass, the mass of the total material consumption, as well as generate signals controlled by the loading of the weight bin.  The third functional block 46 is working. in the following way.  The counting inputs of the counters 14 and 15 pulses, operating in the subtraction mode, receive a sequence of pulses with a frequency G from the generator 6 clock pulses.  The transfer signal of the pulse counter 14 determines the beginning of the comparison cycle of the N, and D codes.  .  This signal arrives at one of the inputs of the RS flip-flop 22, sets it to the O position and thereby prohibits the passage of the frequency f through the AND element 27 and the blocking node 35 to the counting input of the pulse counter 18.  storing information about the total consumption of material.  When the dosing system is initially turned on, the counter 18 can be reset using the Reset 43 switch.  The same transfer signal, which passed through delay element 38 (for the duration of the frequency pulse o) arriving at the counting input D of the trigger 23, sets it to the state O, closing the E 28 element through one of the inputs to pass the transfer pulses of the counter 14 through it .  From the output of the delay element 38, the pulse CHI- comes in addition to the inputs Recording of counters 14 and 15, recording in them, respectively, the NniC code of the outputs of the weight sensor 2 and the Dj code.  from the outputs of the register 21 of the memory included in the function block 45.  The code comparison cycles are repeated with a period of t3.  As the weight hopper is loaded with the material to be dosed, the value of N grows.  From the output of the weight sensor, the inputs D and R of the trigger 24 receive a logical O signal, supporting it in the state O at the output.  Upon reaching the mass of the material of the installation of the dose advance at the output of the sensor 2.  the weight signal appears logical 1.  Now the pulse at the counting input of the trigger 24 can change its state.  Blocking trigger 24 with a pre-dose signal from the weight sensor output is an additional measure of protection against possible interference.  Since until the weight of the charged coke in the weight bin reaches the dose advance value for the power off signal, neither the dosing error recording signals in the memory register 19 and the total material consumption in the counter 18 cannot pass.  If, due to the effect of interference, the value of B (. The r was calculated incorrectly in one of cycles 2 (for example, more than it should be), the resulting transfer signal of counter 15 cannot change the state of trigger 24 until the mass of material in the bunker has reached the dose advance, but by this time in the following cycles r the value of r (.  will be determined correctly.  Similarly, if the interference is perceived as an action of the Shutter signal, the signal from the output of trigger 24, which enters loading control unit 5 and to one of the inputs of element I 30, blocks the passage of a power supply shutdown signal, recording dosing errors to memory register 19 and total the consumption of the material in the counter 18 pulses until the mass of the material in the weight bin reaches the dose anticipation value, t. e.  . value close to the mass of material that needs to be loaded into the weight bin.  Upon reaching the value of N, the value of Dck at the output of the pulse counter 15, a transfer signal arises simultaneously with the transfer signal at the output of the pulse counter 14.  When the output of the counter 15 pulses did not appear.  The pulse from the output of the counter 15 is fed to the counting input of the trigger 24.  With the first transfer pulse of the counter 15, the trigger 24 is tilted to the state 1.  The remaining pulses of its state do not change.  The logical 1 signal at the output of the trigger 24 determines the instant when the mass of the wet material being loaded reaches the value of the corrected mass of the dose.  It enters the loading control box of the weighing bin 5, where the signal for switching off the electrovibration feeders and the signal allowing the opening of the shutter of the weighing bin are generated.  The loading of the weight bin does not stop immediately, but continues for some time after the Dose signal appears due to the inertia of the vibrating feeder.  An additional mass of the poured coke xlN is fed into the weight bin.  Since in this case the value (H, measured by the weight sensor 2, becomes greater than the calculated value, then in each comparison cycle between the codeoses M and Dctt the transfer signal at the output of counter 15 will appear earlier than at the output of counter 14.  And the N code obtained in the counter 15 by the end of each comparison cycle is the mass of the pour, to a given time in the additional code -4 / H, since the number of pulses f, received at the counting input of this counter, is subtracted from the volume of the counter 13 the time between the occurrence of the transfer signals at the outputs of the counters 14 and 15.  In addition, the signal from the output of the trigger 24 is fed to one of the inputs of the element I 30, opening it through this input, and to the input of the waiting multivibrator 33, which generates a negative polarity pulse of duration i4, closing one of the inputs of the element I 31 at this time.  Time 4 is selected based on the inertia of the vibrating feeder.  This is the time that is required so that from the moment the Dose signal appears, there is a complete cessation of the material supply to the weighing bin.  After the time t, the indicated input of the element I. 31 opens, the prohibition on the passage of signals through this element I. is lifted. The gate of the weight bunker will open only if the enabling signal, Dose, is received from the load control unit 5, and the skip is set to the skip meter and the corresponding program is set.  The signal to open the gate of the weigh bin is input to the proposed device.  This signal, in addition to the block 5 for controlling the load, is fed to the input of the 5D-trigger 23, setting it to the state of logical 1 at the output.  Thus, the AND element 30 is open in two entrances.  After the arrival of the signal, the Gate of the counter 14 transfer pulse passes through the elements 30 and 31 and the blocking block 34 to the input Record of the memory register 19, recording in it an additional code of the maximum mass of the poured material into the weighing bin by the time the shutter opens.  This value will be stored in memory register 19 until the gate signal arrives in the next dosing cycle, since the transfer signal of counter 14, which was written to the register

19 memory, through the delay element 38 enters the counting input of the trigger 23, sets it to the state O

As the weight bunker is unloaded, the mass of material in it decreases, and when it becomes smaller. the precursor masses, from the output of the digital scales, to the inputs D and R of the trigger 24, will receive a logical O signal, which will set it to the initial zero state.

The signal from the output element AND 30, krme described, enters through the delay element 39 to the input of the trigger 22 and sets it to the logical state 1, allowing the passage of frequency pulses through the element 27 and the blocking block 35 to the counting input of the counter 18. The counter 18 dials information for a time equal to the duration of the code-t comparison cycle, i.e. code N, corresponding to the mass of the wet material actually poured into the weighing bin in this dosing cycle. The transfer signal of the counter 14, the trigger 22 is set to the logical state, 0, prohibiting the collection of information into the counter 18 of the total material consumption. In each dosing cycle, the counter 18 is opened once for a time equal to the maximum duration of the comparison cycle of the codes t after the arrival of the shutter signal.

Thus, in the subsequent dosing cycles, the contents of the counter 18 are increased by the amount of the mass of material loaded in these cycles into the weight bin, i.e. the total consumption of material is determined, which is visually displayed by the digital display unit 40.

Shutter signal in case of peak feed, i.e. In the case when the opening of the gate of the weighing bin is made simultaneously with the start of the shut-off of the vibrating feeder, it comes earlier than time. t after the occurrence of the dose signal. AT

In this case, the signal from the output of the standby multivibrator 33 blocks the passage of the signal from the output of the counter 14 to the input Record of the memory register 19. In this cycle of dosing, the new value of the mass of pouring is not determined (it cannot be determined, since after opening the gate of the weight bunker, the material continues to flow into it, and the weight sensor 2 does not detect the true maximum value of the material filled in the weight bin) the dN value determined in the previous dosing cycle. This allows the material to be dosed with the predicted mass of the pour.

When the material is poured out of the weight bin, the weight sensor 2 generates a mass zero signal when the mass reaches a level close to zero. This signal enters the loading control unit 5, at the output of which signals are formed to close the gate of the weighing bin and turn on the vibratory feeder. A new loading hopper begins. Compensation of the mass of material remaining in the weight bin from the previous load, as well as compensation of the load cell signal due to the imbalance of the load cell bridge, for example, from temperature, is performed in the weight sensor 2 at the next shutter closure of the weight bunker before the new load.

In the proposed device, the corrected mass of the dose is D. and the comparison of the codes M | t (And Dp is performed with a sufficiently high accuracy. Possible error is a unit of the least significant bit of the code.

The proposed device also has a sufficiently high response rate, since the magnitude of the adjusted dose mass is determined at the beginning of each load cycle of the weight bencher and subsequently remains constant in this dose cycle.

Claims (1)

DIGITAL WEIGHT DOSING CONTROL DEVICE containing a moisture meter, weight sensors, a unit for specifying the mass of a dose of material, a load control unit, three pulse counters, two memory registers, a clock pulse generator, an RS trigger, seven I elements, an OR element, a first switch and a power source that distinguishes - with the fact that, in order to increase the accuracy of dosing by controlling the accuracy of the information received from the moisture meter, a third memory register, synchronization unit, frequency comparator, digital comparator, to set the base humidity, six pulse counters, two counting flip-flops, a waiting multivibrator, two interlock units, four delay elements, a digital indication unit, the second and third switches, the output of the synchronization unit being connected to the first input of the frequency comparator and the first input of the first AND element, the second input of which and the second input of the second AND element are connected to the output of the frequency comparator, the second and third inputs of which are connected respectively to the first and third outputs of the clock generator, whose output is connected to the third input of the second AND element, whose first input and the third input of the first AND element are connected to the output of the first switch 9, the fourth output of the clock generator is connected to the counting input of the first pulse counter, the output of which is connected to to the input Record the second memory register and through the first delay element to the inputs Record the first and second • pulse counters and to the input of the clock generator, the fifth output of which is connected to the input of the synchronization unit, to the counting inputs the third, fourth, fifth and sixth pulse counters and the second input of the third AND element, the output of the first AND element is connected to the summing device, and the output of the second AND element to the subtracting inputs of the second pulse counter, the outputs of which are connected to the inputs of the seventh counter through the second memory register, and the installation inputs are connected to the unit for setting the mass of the dose of material, the counting input of the seventh pulse counter and the second input of the fourth element And, the first input of which and the first input are fifth, are connected to the output of the third pulse counter about element And are connected to the output of the second switch connected to the input of the first switch, the third input of the fourth element And and the second input of the fifth element And are connected to the output of the digital comparator, the group of inputs of which is connected to the group of outputs of the hygrometer and to the group of inputs of the fourth pulse counter, the output of which connected to the counting input of the eighth pulse counter and the first input of the OR element, the output of which is connected to the third input of the fifth AND element, the output connected to the input Recording the fourth counter and of pulses, the output of the fourth element And is connected to the Record third pulse counter input, the group of inputs of which is connected to the output group of the base humidity setting unit, the output of the seventh pulse counter is connected to the Record third memory register input and, through the second delay element, to the seventh and eighth counter recording inputs pulses and the second input of the OR element, the group of outputs of the eighth pulse counter is connected to the group of inputs of the third memory register, the group of outputs of which is connected to the group of inputs of the sixth counter pulses, the group of outputs of which is connected to the group of inputs of the first memory register connected by the group of outputs to the group of inputs of the eighth pulse counter, the output of the fifth pulse counter is connected to the first input of the RS-flip-flop, the second input of the sixth element And, and through the third delay element, to the counting input the first counting trigger and inputs Recording the fifth and sixth pulse counters, · the output of the sixth pulse counter is connected to the counting input of the second counting trigger,]) - and the R-inputs of which are connected to the second output of the sensor weight, the third output of which is connected to the first input of the load control unit, the first input of the device is connected to the S-input of the first counting trigger and the third input of the load control unit, the output of the first counting trigger is connected to the third input of the sixth element And, the first input of which is the second input the loading control unit and the input of the standby multivibrator are connected to the output of the second counting trigger, the output of the standby multivibrator is connected to the first input of the seventh element Y, the output of which is connected to the first input of the first blocking node, the output of which is connected to the input Record of the first memory register, the output of the sixth element And is connected to the second input of the seventh element And and through the fourth delay element to the second input of the RS-trigger, the output of which is connected to the first input of the third element And, the output of the connected with the first input of the second locking unit, the second input of which and the second input of the first locking unit are connected to a power source, the output of the second locking unit is connected to the counting input of the ninth pulse counter, the outputs of which are are connected to the inputs of the digital display unit, the input Reset of the ninth pulse counter is connected to the output of the third switch, the first input of which is connected to the first input of the first and second switches and connected to one pole of the power supply, the second inputs of the first, second and third switches and the D-input of the first the counting trigger is connected to the other pole of the power source, the first outputs of the weight sensor are connected to the inputs of the fifth counter, and the second input of the device is connected to the input of the synchronization unit.