SU1161924A1 - Device for controlling batch-weighing scale - Google Patents

Abstract

1. A DEVICE FOR CONTROLLING A WEIGHT PORTIONAL BATTERY containing an angle-time converter, a portion setting unit and an indication unit, characterized in that, in order to improve accuracy, it contains a series-connected start pulse generator, first trigger, first element AND, first element OR, square pulse shaper, second trigger, second AND element, first delay element, third trigger, third AND element, one-shot and second OR element, sequentially connected pulse generator modulation, the second delay element, the fourth And element and the fourth trigger, series-connected cycle pulse generator and the fifth And element, as well as the fifth and sixth And element, whose first input is connected to the first output of the fifth trigger, the second input to the output of the converter is an angle of time interval, to the second input of the second element I and to the first input of the display unit, and the output to the second input of the first trigger, the input of the portion setter is connected to the output of the square pulse former, with the input of the transducer The angle is the time interval with the first input of the fifth trigger, the first output with the second input of the second trigger, and the second output with the second input of the fifth trigger connected with the second output to the third input of the second element, the output of which is connected to the S second input The third element is AND, (L the second input of the third trigger is connected to the output of the trigger pulse generator and to the second input of the fourth trigger, the second output to the second input of the fifth AND element and to the second input of the second OR element, and the first: output to the second xat the input of the fourth element AND, the output of the fifth element AND is connected to the second input of the first element N5 41 OR, the output of which is connected to the second and third inputs of the display unit, the output of the fourth trigger is connected to the second input of the first element AND, the third input is connected to the output pulse modulation generator. 2. A device according to claim 1, characterized in that. angle transducer - the time interval consists of a chute made of a magnetostrictive material, the ends of which are connected through a silencer, the input magitto

Description

A string converter connected to the output of the recording amplifier, while the sump is annular with a center coinciding with the arrow axis, rigidly connected to the corresponding output magnetostrictive converter connected to the read amplifier, and the input of the write amplifier is connected to the input of the converter, and the output of the reading amplifier is zan with the output of the converter.

3. The device according to claim 1, characterized in that the unit control portion consists of a chimney made of a magnetostrictive material, at each end of which is 161924

a muffler is installed, an input magnetostrictive converter connected to the output of the recording amplifier, two output magnetostrictive converters connected respectively to the inputs of the first and second reading amplifiers, the input of the recording amplifier is connected to the input of the setting device, and the outputs of the first and second reading amplifiers are connected respectively to the first and second to the second outputs of the setter.

4. The device according to PP. 1-3, characterized in that the materials of the conduits of the transducer angle - time interval and the unit setpoint portions are selected to be the same.

The invention relates to weighing technology and can be used in automatic control systems for weight batch metering devices that have dials of weight indicators.

The purpose of the invention is to improve the accuracy of the device.

The drawing shows a functional diagram of an apparatus for controlling a weighing batch doser.

The device for controlling the weight batch metering device contains a trigger pulse generator 1 in series, the first trigger 2, the first element FROM, the first element OR 4, the former 5 rectangular pulses, the second trigger 6, the second element AND 7, the first delay element 8, the third trigger 9 , the third element And 10, the one-shot 11 and the second element OR 12, serially connected pulse modulation generator 13, the second delay element 14, the fourth element And 15, the fourth trigger 16, sequentially connected pulse generator 17 s cycles and a fifth AND gate 18, and a fifth flip-flop 19 and the sixth AND gate 20, a first input of which is connected to the first output of the fifth flip-flop.

Angle converter 21 - time interval, display unit 22, portion setting control 23.

Angle - time interval converter consists of a chute 24 made of a magnetostrictive material, the ends of which are connected through a silencer 25, an input magnetostrictive converter 26 connected to the output of recording amplifier 27, while the duct is made ring-shaped with a center that coincides with the axis 28 of the arrow 29. associated with a corresponding output magnetostrictive transducer 30 connected to the read amplifier 31, the input of the recording amplifier being connected to the input of the converter. The unit setter consists of a chute 32 made of a magnetostrictive material, at each end of which a silencer 3 of the input magnetostrictive converter 34 is connected to the output of recording amplifier 35, two output magnetostrictive converters 36 and 37 connected respectively to the inputs of the first 38 and second amplifiers readout. The input of the recording amplifier is connected to the input of the setting device, and the outputs of the first 3 and second reading amplifiers are connected respectively to the first and second inputs of the setting device, while the conductor materials of the angle converter - time interval and the setting unit of portions are selected to be the same. The display unit consists of a generator of 40 counting pulses connected to the first input of the seventh element I 41, whose output is connected to the counting input of the pulse counter. The output of the sixth trigger 43 is connected to the second input of the seventh element I, and the output of the pulse counter is connected to the device 44. The first input of the sixth trigger is connected to the output of the reading body, and the inputs of the zero setting of the sixth trigger and pulse counter are connected to the output of the first element OR, the first input of the sixth trigger is connected to the first input of the display unit, the second input of the sixth trigger is connected to the second input of the display unit, and the second input of the pulse counter with the third input of the display unit. The device works as follows. At the beginning of the first cycle of weighing, the generator 1 start pulse generates a pulse (at the command of the operator), which sets the triggers 2, 9 and 16 to the zero state. After that, the trigger potential from the output of the trigger enters And 3, and its second input receives the inhibitory potential from the output of the trigger 16. From the one of the outputs of the trigger 9 enters the inhibitory potential to the inputs of the elements 15 and 10. From the other output of the trigger 9 enters the allowing potential to the input of the element 18 and the high potential to the input OR OR 12. As a result, at the output of the element OR 12, a control signal appears, under the action of which the loading actuator (not shown in the drawing) is activated, for example, a sector lock, and the weighing bin starts supplying the dosing material. After this, the first pulse from the generator output 17 cycles passes through the open element AND 18, through the element OR 4 and enters the input of the generator 5 square-wave pulses, which is intended to form a direct impulse with a given duration. The pulse from the output of the pulse generator 5 sets the triggers 6 and 19 to zero states, in which the potential from the output of the trigger 6 is prohibiting 1 DIM for the AND 7 element, the potential from one of the outputs of the trigger 19 is resolving for the AND 7 element, and the potential of the other output the trigger 19 is prohibiting the AND 20 element. In addition, the first pulse from the output of the shaper 5 is fed to the input of the recording amplifier 27, and then to the input magnetostrictive converter 26. By the action of this pulse in the direct conversion zone 26 after Due to the direct effect of magnetostriction, a longitudinal mechanical voltage pulse arises, which propagates along the acoustic conductor 24 at the speed of sound from the zero point of the angle of rotation of the arrow 29 of the dial indicator to the inverse transformation zone of the output magnetostrictive converter 30, which is rigidly connected with the arrow 29. Under the action of this mechanical voltage pulse, due to the inverse magnetostriction effect, an electrical signal is generated in the winding of the output converter 30, which amplified and formed into a pulse by the read amplifier 31. This pulse from the output of the readout amplifier 31 is delayed with respect to the first pulse from the output of the pulse shaper 5 by a delay time equal to where Ijg is the length of the sound duct between input 26 and output converter 30; - speed 3BVKa. Thus, the angle of rotation of the pointer 29 of the face pointer in the time interval t, is transformed. Similarly to the described nepRwii impulse-from the output of the formating and 1 pulses passing through the amplifier 35 recording the setting unit 23, it goes to the input magnetostrictive transducer 34, where in the area of its direct conversion a pulse of longitudinal mechanical voltage occurs that propagates along the acoustic conductor 32 with the speed of sound reaches the inverse transform zone of the output magnetostrictive converter 36. Under the action of this mechanical voltage pulse in the winding of the output transducer 36 ie an electrical signal which is amplified and formed into a pulse amplifier 38 read. This pulse sets the trigger 6 to a state in which the signal from its output is permitting for element 7. The time interval between the first pulse from the output of the pulse shaper 5 and the time the resolution potential is established from the output of trigger 6 is the duration of a given dose roughly and preliminarily by selecting the required length of the sound duct between the input 34 and output converters 36, i.e. by moving the transducer 36 along the bus duct 32.

In addition, the longitudinal mechanical voltage pulse, spreading further along the conduit 32, after some time reaches the zone of inverse transformation of the output magnetostrictive converter 37, under the action of which an electrical signal is generated in its winding, which is amplified and formed into a pulse by the read amplifier 39. This pulse sets the trigger 19 to a state in which the signal from one of its outputs is enabling for the element 20, and the potential from the other output is prohibiting for the element 7. The time interval between the first pulse from the output of the pulse shaper 5 and the moment the setting of the resolving potential from the output of the trigger 19 for the element And 20 is the duration of a given dose of exactly tdo, | and pre-set by

moving the transducer 37 along the guide duct 32.

To increase the reliability of the device, it is necessary to

 -DoZ (.. 2

1de is the pulse repetition period from the output of the generator 17 cycle pulses. The pulse from the output of the readout amplifier 31 enters the second inputs of the elements 7 and 20. If the current value of the measured weight is less than a predetermined dose, i.e. if a

Zod Aozy / t oSn,. then the inputs of the elements And 7 and 20 receive the inhibitory potentials from the outputs of the flip-flops 6 and 19 and, therefore, the pulse

from the output of the amplifier 31 through them

will not pass. After that, under the action of the second and subsequent pulses from the output of the pulse generator of cycle 17, the entire described process repeats until, after the influence of the nth pulse from the output of the generator of cycle 17, the current discharge of the dosed mass reaches a predetermined dose roughly, i.e.

(-1, ass AOibi

in this case, the pulse from the output of the read amplifier 31 is fed to the input of the element And 7 at the moment when its second input is already supplied

resolving potential from the output of the trigger 6, At the output of the element And in / l CTC, the pulse that arrives at

the input element is And 10. Since its second input receives the inhibitory potential from the output of the trigger 9, then the output element And 10 there is no pulse. In addition, the pulse from the output of the element And 7 passes through the delay element 8 and switches the trigger 9 to the opposite state, i.e. when the resolving potential is fed to the inputs of the AND 15 and 10 elements from one of its outputs, and the inhibiting potential to the input of the AND 18 element and the low potential to the input of the OR 12 element is supplied from the second output of the trigger 9, and the delay time of the element 8 should be no less the duration of the pulse from the output of the element 7. The control signal from the output of the element OR 12 disappears, as a result of which the executive loading mechanism

KLE1 and the dosing material ceases to flow into the weighing bin.

After the resolving potential is established at the input of the E 15 And 15, the first pulse from the output of the pulse modulation generator 13 passes through the delay element 14, then through the open element 15 and switches the trigger 16 to the state where the potential from its output is allowing the element And 3. In this case, the delay time of the element 14 must be less than the pulse duration from the output of the generator 13. In this case, the first pulse from the output of the generator 13 does not pass through the element 3, After that the dosing is performed in the mode dosypok, i.e., when the actuator loading (sector gate) starts to operate in a pulsed mode. The pulse period from the output of the pulse modulation generator 13 is chosen to be equal to the time required to calm the mechanical system. The second pulse from the output of the pulse modulation generator 13 passes through the open element AND then through the element OR 4, the pulse shaper 5 and sets the triggers 6 and 19 to the state in which the output of the trigger 6 is prohibiting the element 7, one of the outputs of the trigger 19 is prohibiting an element. In addition, a pulse from the output of the pulse shaper 5 is fed to the inputs of the recording amplifiers 27 and 35, and then to the input magnetostrictive converters 26 and 34, After a time (roughly) pulse from the output of the reading amplifier 38 turns on the trigger 6 in the opposite state, and then through time, 3, (exactly) the pulse from the output of the reading amplifier 39 switches the trigger 19 to the opposite state. Thus, in the time interval Jt Aojbi-i loyet 3 inputs of the element And 7, the resolution potentials come from the outputs of the flip-flops 6 and 19, if the current value of the dosed mass is within

Aoei. And the dozig1o pulse from the output of the amplifier 31 goes to

619248

the input element And 7 at the moment, the resolving potentials from the outputs of the flip-flops 6 and 19 are supplied to its remaining inputs. At the output of the element And 7 a pulse appears, which enters the input of the element And 10, to the second input of which the resolving potential comes from the output of the trigger 9 Impulse output and 10

10 starts the one-shot 11 and under the influence of its output pulse at the output of the element OR 12 a pulse of the control signal appears, under the action of which the first filling of the dosed material is performed. The pulse width of the control signal, i.e. the amount of surplus is determined by the duration of the pulse generated by a single vibrator 11. After some time, sufficient to calm the mechanical system, the next pulse appears at the output of the generator 13, and if after

5 of the feed rate, the value of the dosed mass is in the range between the values roughly and accurately, i.e.

loe / zaA AoSyg 1o sscb. The described process of filling is repeated again 0 and t, d. If the next portion of dosypka value of the dosed mass reaches the specified dose exactly, i.e.

-The next pulse from the output, generator 13 passes through

j open element AND 3, element OR 4, pulse shaper 5, setting-. triggers 6 and 19 to the zero state and to the inputs of recording amplifiers 27 and 35. After a time

0 -AIDES A pulse appears in the output of reading amplifier 39, which switches trigger 19 to another state when the potentials from its outputs are prohibiting for

5 elements and 7 and permitting

element And 20. The pulse occurring through time t at the output of the force; the readout body 31, passes only through the open element I 20 and switches trigger 2 to a single state, after which the potential from its one output is prohibiting the element 3. At this, the dosing process ends and

the potential taken from the second output of trigger 2 is the control signal End of dosing.

Claims (4)

1. A device for controlling a weighted batch metering device, comprising an angle converter, a time interval, a portion adjuster and an indication unit, characterized in that, in order to improve accuracy, it contains a trigger pulse generator, a first trigger, a first AND element, a first OR element, square-wave pulse generator, second trigger, second AND element, first delay element, third trigger, third AND element, one-shot and second OR element, serially connected pulse mode generator radiation, the second delay element, the fourth element And and the fourth trigger, series-connected pulse generator of cycles and the fifth element And, as well as the fifth trigger and the sixth element And, the first input of which is connected to the first output of the fifth trigger, the second input to the output of the transducer angle time interval to the second input of the second AND element and to the first input of the display unit, and the output to the second input of the first trigger, the input of the portion generator is connected to the output of the square-wave pulse generator, and the angle a belt interval with the first input of the fifth trigger, the first output with the second input of the second trigger, and the second output with the second input of the fifth trigger connected by the second output to the third input of the second element And, the output of which is connected to the second input of the third element And, the second the input of the third trigger is connected to the output of the trigger pulse generator and to the second input of the fourth trigger, the second output to the second input of the fifth AND element and to the second input of the second OR element, and the first output to the second input of the fourth AND element, the output of the fifth AND element is connected to the second input of the first OR element, the output of which is connected to the second and third inputs of the display unit, the output of the fourth trigger is connected to the second input of the first AND element, the third input of which is connected to the output of the pulse modulation generator. 2. The device according to claim 1, characterized in that the angle-time interval converter consists of a sound duct made of magnetostrictive material, the ends of which are connected through a silencer, an input magnet SU. _O n 1161924> a striction transducer connected to the output of the recording amplifier, the sound conduit being ring-shaped with a center coinciding with the arrow axis rigidly connected to the corresponding magnetostrictive output transducer connected to the read amplifier, the input of the write amplifier being connected to the input of the converter, and the output of the read amplifier with the output of the converter. 3. The device according to π. I, characterized in that the portion controller consists of a sound duct made of magnetostrictive material, at each end of which a silencer is installed, an input magnetostrictive converter connected to the output of the recording amplifier, two output magnetostrictive converters connected respectively to the inputs of the first and second amplifiers · Washing, the input of the recording amplifier is connected to the input of the master, and the outputs of the first and second reading amplifiers are connected respectively to the first and second outputs odes to the master. 4. The device according to paragraphs. 1-3, characterized in that the materials of the sound ducts of the angle-time converter and the portion manager are the same.