SU1111186A1 - Device for counting seeds - Google Patents

Abstract

1. A DEVICE FOR SEEDS ACCOUNT, containing a body inside which a bunker, a tray, an electromagnet and a photo sensor are fixed, which is so that, in order to enhance the functionality and increase the accuracy of the device, the agitator with the gearbox is rigidly connected to the body, electric motor, first and second electric motors with eccentrics and scales with photo sensors, rotary lever fixedly mounted on the housing with a funnel, movably mounted roundabout with the driving finger on the body stand, additional trays, a disk with holes for glasses, a Maltese mechanism, a gearbox with a cam and position sensors, a mixer gearbox is kinematically connected to the shaft of the first electric motor with an eccentric, which is rigidly connected to the bunker hinged to the body, the first, second and third additional trays are fixed shifted one above the other, the outlet of the mixer with the gearbox is connected to the upper opening of the hopper, the lower opening of which is located above the third additional tray and above one end of the tray, which is rigidly connected with the first, second and third additional trays and installed under them, the funnel of the rotary lever is kinematically connected to the electromagnet core and installed in the zone of the other end of the tray, under which the fourth additional electrode is installed (L tray, eccentric of the second electrodrive is rigidly connected to all the trays, the shaft of the electric motor is kinematically connected with a cam gearbox, which is fixed under the axis of the carousel, the drive pin of which is located in the zone of engagement with the crosspiece of the Maltese mechanism, the crank of which About kinematically connected with a cam gearbox, the carousel is rigidly connected to the disk, the CX hole of which is located between the exit hole of the movable funnel of the swivel lever and the measuring platform of the balance, the photodotchik is mounted between the output end of the first additional tray to the disc hole, the first and second sensors the positions are set respectively in the zone of movement of the crank mechanism of the Maltese mechanism and in the zone of movement of the disk with holes, the outputs of the first and second photosensors of the balance, the output of the photosensor

Description

and the outputs of the first and second position sensors are connected respectively to the first to the fifth inputs of the control unit, the first to the fourth outputs of which are connected to the control inputs of the electromagnet, respectively, the first and second eccentric electric motors and the electric motor.

2. A device according to Claim 1, characterized in that the bunker is provided with inclined bottoms, the lower edge of which is made in the form of a gr.

3. The device according to Claim 1, is based on the fact that the scales are discharged from a quadrant weight meter and photosensors mounted on the screen of a quadrant weight meter, the scale of which is provided with a dark spot.

4. The device of Claim 1, so that the control unit contains keys, triggers, pulse drivers, indicators, a switch, decryptors, a time relay, a comparator, a start button, a counter, and a differential amplifier whose inputs are respectively the first and the second inputs of the control unit, the outputs of the differential amplifier are connected to the inputs of the first indicator and the first and second pulse shapers, the outputs of the latter are connected to the first inputs of the first and second switches, the outputs of which are connected respectively Venn

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with the first inputs of the switch and the first trigger, the output of which is the first output of the control unit, the third input of which is the input of the comparator, the output of which through the third pulse shaper is connected to the input of the counter, the outputs of which through the first and second decoders are connected respectively to the input of the second indicator and to the second input of the switch, the output of which is connected to the first input of the second trigger, the first output of which is connected to the second input of the first trigger and through a time relay to the second inputs the first and second keys, the fourth and fifth inputs of the control unit are the inputs of the fourth and fifth pulse shapers, the outputs of which are connected to the first inputs of the third and fourth triggers, respectively, the output of the last connected to the first input of the third key, the output of which is connected to the second input the second trigger, the second output of which is connected to the second input of the third trigger, the first output of which is connected to the second input of the third key, the trigger button; Connected to the second input of the fourth trigger and to the third input of the second flip-flop, the third output of which is the second and third outputs of the control unit, the fourth output of which. Ow the second output of the third trigger.

The invention relates to the field of automation, to devices for seeding seed weights, for example, lowered cotton seeds, weighing and sampling using seed counting to a specified amount for further use in various quality tests cewiH. x .4

There is a known weighing weigher for multiple weighing, in which

the weighing of the bulk product is carried out on two scales: the top, in which 80-85% of the mass is weighed, and the bottom, consisting of a vibrating channel, for the final product weighing before the final weighing til.

Weight weighers with two weighing devices have low productivity, are not reliable enough in operation and do not provide high precision weighing, and for weighing seeds with a hairy surface and ensuring their over-,

3

Spaces in the same row are unsuitable for counting, since they are equipped with complex lever and valve systems with electromechanical control and wide overpasses.

The closest to the technical essence of the invention is a device for counting seeds, comprising a housing in which a silo with a tray and a turner, a separation mechanism, a photosensor, connection 8: 1 1st, is installed. to the pulse counter, spring hammers connected to the icopnyeoM and located above the drc, and the electromagnet C21.

The disadvantages of the prior art are as follows. The rigid connection of the bunker with the vibrating conveyor on the presence of rotating cixis wire agitators does not prevent a reliable separation of onv eHHiMx seeds H cotton, as a result of them they Get stuck in the bunker or on the vibrotrays the seeds are connected by hair, which is uneven; sufficiently accurate weighing is provided. In addition, this device cannot be used in weighing mode. I. The purpose of the invention is to improve the accuracy of weighing and counting by reliably separating the seeds from the fuzzy surface and feeding them in one row to the weighing and counting position.

The goal is achieved in that a device for dd counting seeds, containing a housing, inside which a bunker, a tray, an electromagnet and a photosensor are fixed, is introduced with a gearbox, electric motor, first and second eccentric electric motors, and scales with photosensors that are rigidly connected to the body. mounted on the housing swivel arm with a funnel, movably mounted on the housing stand carousel with a driving finger, additional trays, a disk with holes for glasses, the Maltese Mechanism, a gearbox with a cam and position sensors, The mixer mixer is kinematically connected to the shaft of the first electric motor, with an eccentric, which is rigidly connected to the bunker, hinged on the housing, first, second and third additional trays strengthened

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shifted one above the other, the outlet of the agitator with gearbox is connected to the upper opening of the hopper, the lower opening of which 5 is located above the third additional tray and above one end of the tray, which is rigidly connected to the additional trays and installed below them, the swivel arm funnel kinematically associated with the electromagnet core and installed in the zone of the other end of the tray, under which the fourth additional tray is installed, the eccentric of the second electric motor

S | is rigidly connected to all trays, the shaft {kinematically electric motor is connected to a cam gearbox, which is fastened under the axis of the carousel, the drive pin of which is located in the zone of engagement with the cross of the Maltese mechanism, the crank of which is kinematically connected to the cam gearbox, camous carousel hardwired with the disk

5 the opening of which is located between the exit hole of the movable funnel of the rotary lever and the measuring platform of the balance, the photo sensor is installed between the exit

0 end of the first additional

tray and disc hole, the first and second position sensors are installed respectively in the area of movement of the crank mechanism of the Maltese

- in the area of the disk opening with holes, the outputs of the first and second photosensors of the balance, the output of the photosensor and the outputs of the first and second position sensors are connected respectively

Q from the first to the fifth inputs of the control unit, the first to the fourth outputs of which are connected to the control inputs of the electromagnet, respectively, the first and second electric motors with an eccentric and an electric motor.

The bunker is equipped with inclined bottoms, the bottom edge of which is made in the form of a comb.

JJ Scales are made of a quadrant weight meter and photo sensors mounted on the screen of a quadrant weight meter, the scale of which is provided with a dark spot.

The control unit contains keys, triggers, pulse drivers, indicators, a switch, decryptors, a time relay, a comparator, a start button, a counter and a differential amplifier whose inputs are the first and second inputs of the control unit, the outputs of the differential amplifier are connected to the inputs of the first the indicator and the first and second pulse generators, the outputs of the latter are connected to the first inputs of the first and second keys, the outputs of which are connected respectively to the first inputs of the switch and n The first trigger, the output of which is the first output of the control unit, the third input of which is the input of the compressor, the output of which through the third pulse shaper is connected to the input of the counter, the outputs of which through the first and second decoders are connected respectively to the input of the second indicator and the second input of the switch whose output is connected to the first input of the second trigger, the first output of which is connected to the second input of the first trigger and through a time relay to the second inputs of the first and second keys, the fourth and The fifth inputs of the control unit are the inputs of the fourth and fifth pulse formers, the outputs of which are connected to the first inputs of the third and fourth triggers, respectively, the output of the latter connected to the first input of the third key whose output is connected to the second input of the second trigger, the second output of which is connected to the second input of the third trigger, the first output of which is connected to the second input of the third key, the output of the start button is connected to the second input of the fourth trigger and the third input of the second trigger, mp Tille whose output is a second and third inputs of the control unit, chetvertm output of which is the second output of the third flip-flop. - In FIG. 1 shows a functional diagram of the device, in FIG. 2 schematically, in an enlarged scale, a pivoting lever with a funnel and a dotted line of its extreme positions; on 4ig.Z - on a larger scale, top view along arrow A on a swivel lever with a funnel, inclined chute, work glasses and a collection of 86 seeds unaccounted for, in figure 4 - view along arrow B on the bottom of the bunker, in figure 5 - view along arrow B on trays; 6 is a functional block diagram of the control unit; FIG. 7 is a diagram of the beam path in a standard quadrant weight meter; in fig. 8 - arrow view. ke G - installation diagram of photo sensors. The device consists of a mixer 1, a hopper 2, a vibrating conveyor 3, a pivot arm 4 with a funnel, a carousel 5, a scale 6 with two photosensors 7 and 8 of gross weight and exact weight, a photo sensor 9, a frame of the housing 10, a drive 11 for rotating and lifting the carousel block 12 controls The mixer 1 serves for constant mixing of the average sample of seeds and consists of a rotating drum, a mixer 13 with a gearbox, a drive tray 14 consisting of a gearbox 15. A drive of the mixer 1 ensures the rotation of the drum and the mixer 13 in opposite directions. The hopper 2 serves to separate the seeds with a pubescent and hairy surface and feed them simultaneously to the upper and lower trays of the vibrating conveyor 3, separated from each other. The hopper 2 consists of a bin 16 of the hopper suspended from the frame 10 on the horizontal axis 17, bottom 18 with jagged notches in the form of a comb 19 at the lower ends (like combs, fig 4) inclined along the course of the seed movement with the formation of a zigzag channel . The oscillatory movement of the hopper 16 is driven from a first electric motor 15 with an eccentric 20, an electric motor sitting on a shaft through a connecting rod. The trays are driven by a second motor 21 with an eccentric. The vibrotransporter 3 serves to feed divided seeds to the weighing position and one row to the counting position and consists of trays tightly interconnected — a chic lower tray 22 for intensive feeding of seeds, first, second and third additional trays 23 for feeding In one case, in the weighing mode and in the counting mode. Additional trays 23 are installed in the Ida cascade. In section, the pitches 23 are made in the form of a straight groove, the height of which has been chosen

on such that, when the seeds are moved through the tray, only seeds remain in it in one row, and the rest are dropped into tray 22.

The vibrating conveyor 3 is fixed pas elastic suspensions 24 attached to the fixed plate 25 of the housing. A sloping tray 26 is rigidly attached to tray 22 at its entrance to remove seeds from tray 22 through the swivel arm funnel. 4 з (fig.З) during dosypka from the top tray at weighing and during the work in the mode of the account of seeds. Under the collection 27 is installed the fourth additional tray 26 (see Fig. H). The vibrotransporter 3 is driven from an electric motor 21 with an eccentric 28 and a connecting rod 29. At the exit of the tray 22, a guide funnel of the swivel lever 4 is installed, which serves to direct the flow of seeds from the tray 22 to the weighing bowl 30, or to the collector 26 (Fig. 3 )

The guide funnel of the lever 4 consists of a direct funnel 31, a body of the lever 32 pivotally suspended from the plate 25, interacting with an electromagnet 33, a spring 34 and anchors 35. The stops 35 fix the two extreme positions of the funnel. The carousel 5 serves to move the working cups 30 to the POSITION of weighing or counting, their installation and removal from the weighing pan 6 and consists of a disk 36 with holes for the cups 30. The disk 36 is mounted on a vertical axis 37 with the possibility of rotation around it, raising and lowering along with it on a fixed rack 38. On the disk 36, there is a movable stop 39, which interacts with the second position sensor 40, fixedly mounted on the frame of the housing 10. The stop 39 serves for setting, the program - the characteristics of the glasses to be filled with a hinge or a choice cr The rotation and elevation of the carousel 5 is driven from the electric motor 41 via a V-belt transmission, a gearbox 42 with a cam, a vertical output shaft 43, and a crank 44 of the Maltese mechanism, which interacts with the first position sensor 45. The carousel disc 36 is provided with a finger 46 for a detachable connection with a crosspiece 47 maltese mechanism

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I 44. Working glasses 3.0 are equipped with shoulders, the diameter of which is greater than the diameter of the slots in the disk 36. At the lower end of the output shaft of the gearbox

5 42, a cam 48 is mounted, which communicates the vertical lift of the axis 37 and the disk 36 sitting on it. The axis 37 is engaged with the mechanism 49 of the foot lifting of the disk for

0 manual and adjusting it cranking.

Scales with photo sensors 7 and 8 are designed for accurate automatic weighing of the sample and are, for example, laboratory standard scales of the type VLKT-500 M with an optical scale. In scales on the screen

50 (FIG. 7) with an illuminator

51 and mirrors 52, 53, on a larger scale, is projected on a mobile scale with dark divisions, the scale of scales 54. On the scale 54, an additional dark spot is applied to the light background, which is also projected onto the screen 50 in the form of a dark spot 55

5 (Fig.8). At the time of its movement 55, it successively acts on the photosensors 7 and 8 of the scale. The position of the photo sensor 7 corresponds to the gross weight, which is several

0 grams is less than the exact weight, and the position of the photo sensor 8 corresponds to the exact weight.

The control unit 12 (FIG. 6) is designed to receive signals from photo sensors 7 and 8 of the scale, photo sensor 9, position sensors 40 and 45, and generate signals that control electric motors 15, 21, 41 and electromagnet 33, and consists of differential 40 A potential amplifier 56, which serves to amplify the signals from photosensors 7 and 8 and amplify the noise immunity of the circuit against fluctuations of the light flux of the scale illuminator, the first indicator 57 for monitoring

balance the differential amplifier 56 in the absence of signals from photo sensors, the first and second drivers 58 and 59 pulses, which are used to convert smoothly changing signals. They are sharply changing, which is necessary for their further processing, time relays 60 and the first and second keys 61 and 62 employees

55 to temporarily block the passage of signals from photosensors 7 and 8 during the swing of the balance immediately after installing the glass on them, lane 9. Trigger 63, which stores the command to turn on, electromagnet 33, output amplifier 64, comparator 65, serves to amplify the signal from the sensor and protect it from interference of the third pulse generator 66 of the counter 67, which serves to count the pulses from the first decoder 68 sensor, which serves to convert the signals received from counter 67 in binary code in decimal code, the second indicator 69 for visual observation of the number of seeds counted, the second decoder 70, which serves to send the command signal after the counter by counter 67 of a predetermined number of seeds, switch 71, used to select the operation mode (weighing or counting) of the jigger, start button 72, to turn on the selector, fourth and fifth pulse shapers 73 and 74 pulses, to limit the duration of the signals from the sensors 40 and 45, the second trigger 75, which serves to memorize the command to turn on the electric motors 15, 21 and the time relay 60 and to turn off (via the third trigger 76) the electric motor 41, trigger 76, which serves to memorize the command to turn on the electric motor 41 and turn off. (via trigger 75) electric motors 15, 21 and time relays 60, fourth trigger 77 and third key 78, which prohibit the passage of a signal from trigger 76 to trigger 75 at the end of the cycle (the transmitter stops) output amplifiers 79 and 80

The photo sensor 9 is installed at the output of the first additional tray 23, consists of an illuminator and a photodetector, which records the span

seed through the photo beam, giving the signal to the control unit 12.

The device operates in two modes - weighing mode (allocation of weights) and counting mode (sampling).

In weighing mode, the device operates as follows.

In the initial position, the cam 48 is in the position when the empty glass 30 to be weighed is released from the disc of the carousel 36 and is mounted on the weighing pan 6. In the drum of the mixer 1

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load the average sample of seed n. In the slot of the disk 36, the required number of working glasses 30 is installed, having the marking of the corresponding weight of hinge plates. Stop 39 is installed in the socket opposite the last cup to be weighed. In the initial position at. when turned on, the rotary funnel of the portal gate 4 is set so that it directs the seeds through the tray 26 into the collection 27. When the button 72 is pressed (fig.6), the trigger 77 is turned on, allowing

5 of the entire automatic cycle, the passage of the signals through the key 78, the trigger 75 is turned on, which through the output amplifier 79 turns on the electric motors 15 and 21, simultaneously the trigger

0 75 turns on the trigger 63, which turns on the electromagnet 33 through the output amplifier, while the trigger 75 turns on the time relay 60, which starts counting the time. With

5 THIS In mixer 1, intensive mixing of the seeds is carried out due to the fact that the drum and the mixer 13 rotate in opposite directions, through adjustable slots in the bottom of the drum, seeds with a given flow rate flow through the tray. At the same time, the oscillatory movement of the bunker 2 is brought about and the seeds on the bottoms 18 are intensively thrown up, as a result of which they are disengaged. At the gathering of the bottoms, on the comb 19, in which the rectangular holes are made less than two diameters of the seeds, the seeds fall through one of the upper

The Q bottoms are on the bottom and then on the trays 22 and 23 of the vibrating conveyor 3. When seeds are moved along additional trays 23, the seeds are arranged in one row.

Due to the switched on electromagnet 33, the funnel 31 is rotated to a position where the seeds moving along the lower chute 22 are sent to the work cup 30 ..

- From the additional trays, 23 seeds are constantly fed into the work cup. After a certain period of time (when the free oscillation of the scale pan ceases, the

5 due to the installation of the stack. Ia on the bowl) time relay 60 permits the passage of signals about the mass through the keys 61 and 62. When the mass reaches

11 1

Roughly, which is 2-4 g less than the final mass (Exactly), a dark spot 55 acts on the photo sensor 7. The signal from the photo sensor 7, amplified by a differential amplifier 56 and formed by the driver 58, through the key 61 disables the trigger 63, which through the output amplifier 65 turns off the electromagnet 33 funnels. The spring 34 turns the funnel of the rotary lever 4 to the extreme position in which the seeds from the lower tray 22 are directed to the tray 26, and from there to the collection 27 unaccounted seeds. From the trays 23, the seeds continue to move in one row into the weighed cup 30. When the specified seed mass (Accurately) is reached, a dark spot 55 acts on the photosensor 8. The signal from the photosensor 8, amplified by a differential amplifier 56, formed by raster No. 59, through key 62, work switch 71 turns off the trigger 75. The trigger 75 through the output amplifier 79 turns off the electric motors 15 and 21, reset the time relay 60 and turns on the trigger 7b, which turns on the electric motor 41 via the output amplifier 80. Mixture drives the bodies 1, the bunkers 2, the vibrating conveyor 3 are turned off and the transportation of the seeds is stopped, and the cam 48 starts to rotate again. When it is rotated, the disk 36 is lifted, which raises the cup 30 from the pan when moving. At the end of lifting the disc 36 with glasses 30, the crank 44 of the Maltese mechanism rotates the disc 36 by one position, moving the next glass

..in the weighing position. When 1 crank 44 is turned one turn round, the cuff 48 lowers the disc 36 with the base, including the next cup. The crank presses the sensor 45. The signal from the sensor 45 spheres world optically shaper 74, turns off the trigger 76, which through the output amplifier 80. Turns off the electric motor 41, and through the key 78 turns on the trigger 75 The trigger 75 through the amplifier 79 turns on the electric motors 15, 21 and relay 60 of time.

The weighing cycle is further repeated in the same sequencer 1118612

in automatic mode until the stop 39 before setting to the next weighing position presses sensor 40. The signal 5 from sensor 40, formed in duration by driver 73, disables trigger 77, which closes key 78.

Another click on the sensor 45

0 at the weighing position will only cause the trigger 76 to turn off, and therefore, the electric motor 41, but the signal from the trigger 76 to activate the trigger 75 will not work, because

5, the key 78 is closed, consequently, mixing and feeding of seeds does not resume. The janitor stops, in the rest position, until the next pressing of the button 72.

0 Weighing on scales 6 is carried out to a constant weight, regardless of the weight of the sample. Different weights are obtained due to the fact that the masses of empty glasses

5 are different from each other in terms of the difference in mass of the specified weights. For example, the weights of two glasses, in which 10 g and 100 g weights are allocated, differ from each other.

0 Another for 90 g. Therefore, each glass is provided with a marking indicating the mass of the sample placed in this glass.

In the counting mode, the device operates as follows.

When turning on the switch 71 to the Counting position, the illuminator 51 of the balance 6 is turned off, the power of the output amplifier 64 and the circuit from the key

62 to trigger .75. At the same time

the light sensor of the photosensor 9 is switched on, the circuit from the decoder 70 to the trigger

75 and the power indicator 69.

I. . . .

The operation of the dividers in the counting mode 5 is similar to the work in the weighing mode with the following differences. Since the electromagnet 33 is disconnected all the time, the seeds enter the cup in one row only from the additional trays 23 and from the lower tray 22 they are constantly withdrawn. nickname 26. The command for triggering the trigger 75 (mixing and sending seeds) comes after the counting by the counter 5 67 before the specified number of seeds (for example, 100) through the decoder 70 and the switch 71. Thanks to the decoder 68 and

13

Indicator 69 has the ability to visually monitor the number of seeds counted.

The use of a vibrotransporter from two rigidly connected and one below the other chutes with an oscillating drive, intermediate oscillating around the horizontal axis of the bunker, equipped with a cascade of inclined bottoms with combs on the side, allows you to increase productivity, metering accuracy and simplify the design of the feeder due to the absence of lever-weight systems with a valve mechanism and creates the possibility of use for weighing commercially available laboratory scales with high accuracy zveshivani.

The device allows logical processing of incoming information and control over it.

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these effects, which increases the performance, accuracy and reliability of the weight dosing and seed counting.

Removing signals on the mass of the sample using photo sensors of the coarse and accurate weights directly from the screen of the scales using a projection on the screen of a dark spot applied directly on the scale of the quadrant scales allows to increase the accuracy of dosing by weight.

The use of a rotary guide funnel with an inclined tray rigidly attached to the vibrotransporter and a seed collection allows you to expand the functionality of the device, since it can work both in the weighing mode (allocation of hinges) and in the seed counting mode.

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Claims (4)

1. DEVICE FOR SEEDS ACCOUNT, comprising a housing inside which a hopper, a tray, an electromagnet and a photosensor are fixed, which requires that, in order to expand the functionality and improve the accuracy of the device; it incorporates a mixer with a gearbox rigidly connected to the body, an electric motor, first and second electric motors with eccentrics, and scales with photo sensors, a rotary lever with a funnel, movably fixed on the body, a carousel with a driving finger, additional trays, a disk with holes under glasses, Maltese .mechanism, gearbox with cam and position sensors, stirrer gearbox kinematically connected to the shaft of the first electric motor with an eccentric, which is rigidly connected to the hopper, articulated replicated on the housing, the first, second and third additional trays are reinforced with a shift above each other, the outlet of the mixer with the reducer is connected to the upper hole of the hopper, the lower hole of which is located above the third additional tray and above one end of the tray, which is rigidly connected with the first, second and the third additional trays and installed under them, the funnel of the rotary · lever is kinematically connected with the armature of the electromagnet and is installed in the area of the other end of the tray, under which the fourth additional the second tray, the eccentric of the second motor is rigidly connected to all the trays, the motor shaft is kinematically connected to the gearbox with a cam, which is mounted under the axis of the carousel, the drive pin of which is located in the engagement zone with the cross of the Maltese mechanism, the crank of which is kinematically connected to the gearbox with the cam, the carousel is rigidly connected to the disk, the hole of which is located between the outlet of the movable funnel of the pivot arm and the measuring platform of the balance, a photosensor is installed between the outlet The first additional tray and the hole of the disk, the first and second position sensors are installed respectively in the zone of movement of the crank of the Maltese mechanism and in the zone of movement of the disk with holes, the outputs of the first and second photosensor weights, the output of the photosensor -SU .... 1111186 and the outputs of the first and second position sensors are connected respectively from the first to fifth inputs of the control unit, the first to fourth outputs of which are connected to the control inputs of the electromagnet, the first and second electric motors with an eccentric, and the electric motor, respectively. 2. The device according to claim 1, characterized in that the hopper is equipped with inclined bottoms, the lower edge of which is made in the form of gr.benki. 3. The device according to claim 1, characterized in that the balance is made of a quadrant weight meter and photosensors mounted on the screen of a quadrant weight meter, the scale of which is equipped with a dark spot. 4. The device according to claim 1, wherein the 'control unit contains keys, triggers, pulse shapers, indicators, a switch, decoders, timers, a comparator, a start button * counter and a differential amplifier, the inputs of which are respectively, the first and second inputs of the control unit, the outputs of the differential amplifier are connected to the inputs of the first indicator and the first and. of the second pulse shaper, the outputs of the latter are connected to the first inputs of the first and second keys, the outputs of which are connected respectively to the first inputs of the switch and the first trigger, the output of which is the first output of the control unit, the third input of which is the input of the comparator, the output of which is connected through the third pulse shaper to the counter input, the outputs of which through the first and second decoders are connected respectively to the input of the second indicator and to the second input of the switch, the output of which it is single with the first input of the second trigger, the first output of which is connected to the second input of the first trigger and through the time relay to the second inputs of the first and second keys, the fourth and fifth inputs of the control unit are the inputs of the fourth and fifth pulse shapers, the outputs of which are connected to the first inputs of the third and the fourth trigger, the output of the latter is connected to the first input of the third key, the output of which is connected to the second input of the second trigger, the second output of which is connected to the second input of the third iggera, a first output connected to the second input of the third switch, the trigger button output is connected to the second input of the fourth flip-flop and to the third input of the second flip-flop, the third output of which is the second and third outputs of control unit, fourth output # which is the second output of the third flip-flop.