SU817504A1

SU817504A1 - Device for determing angular position of crankshaft

Info

Publication number: SU817504A1
Application number: SU792752593A
Authority: SU
Inventors: Борис Иванович Цымбал
Original assignee: Предприятие П/Я А-1877
Priority date: 1979-04-12
Filing date: 1979-04-12
Publication date: 1981-03-30

Description

Изобретение относится к испытаниям машин, в частности к измерению параметров двигателей, а именно к определению углового положения коленчатого вала двигателя внутреннего сго-5 рания (ДВС) в момент начала впрыска топлива.The invention relates to tests of machines, in particular to the measurement of engine parameters, namely, to determine the angular position of the crankshaft of an internal combustion engine (ICE) at the time of fuel injection.

Известно устройство для измерения углового положения вала, содержащее источник счетных импульсов, подклю- Ю ченный через последовательно соединенные Формирователь импульсов, преобразователь частоты в напряжение, управляемый генератор и селектор импульсов к отсчетному устройству, при 15 этом вторые входы генератора и селектора подключены к выходу формирователя импульсов, а второй вход отсчетного устройства - к выходу генератора L1]. 20A device is known for measuring the angular position of a shaft, comprising a source of counting pulses connected via a pulse generator, a frequency to voltage converter, a controlled generator and a pulse selector to a readout device, while the second inputs of the generator and selector are connected to the output of the pulse generator and the second input of the reading device to the output of the generator L1]. 20

Недостатками известного устройства являются большая погрешность измерения и невозможность определения с его помощью углового положения коленчатого вала.в момент начала впрыска 25 топлива из-за отсутствия сигнала, определяющего начало этого впрыска.The disadvantages of the known device are the large measurement error and the inability to determine with its help the angular position of the crankshaft. At the time of the start of fuel injection 25 due to the lack of a signal determining the start of this injection.

Известно также устройство для определения углового положения коленчатого вала, содержащее блок информа- 30 ционных сигналов, связанный через блок усилителей с блоком счетчиков и блоком управления, причем блок информационных сигналов выполнен в виде отметчика угловых меток, датчика меток, отметчика верхней мертвой точки (вмт), датчика вмт и датчика начала процесса, блок усилителей содержит первый, второй и третий усилители, блок счетчиков выполнен в виде первого и второго счетчиков, первой и второй схем совпадения, триггера управления и выходных вентилей, а блок управления выполнен в виде первого и второго триггеров и входного вентиля, так что датчик меток через первый усилитель подключен параллельно к входам схем совпадения, связанным соответственно, с первым и вторым счетчиками, выходы первого из которых через выходные вентили подключены к шинам цифровой вычислительной машины (ЦВМ), датчик вмт через третий усилитель связан последовательно с установочными входами второго и первого триггеров и первого счетчика, датчик начала процесса через второй усилитель и триггер управления связан параллельно с другим входом второй схема совпадения, входами второ3 го счетчика и входными вентилями, соединенными одним входом с шиной ЦВМ и единичным входом первого триггера, а выходом - с единичным входом второго триггера, связанного с другим входом первой схемы совпадения [2], Основном недостатком указанного устройства является небольшая точность измерения углового положения коленчатого вала, особенно в момент начала впрыска топлива при неравномерности углФвой скорости вращения коленчатого вала двигателя в пределах одного оборота, а также невозможность осуществления измерений в пределах каждого оборота двигателя.It is also known a device for determining the angular position of the crankshaft, containing a block of information signals 30, connected through an amplifier block with a block of counters and a control block, and the block of information signals is made in the form of a marker of angle marks, a mark sensor, a marker of top dead center (TDC) , bmt sensor and sensor of the beginning of the process, the amplifier block contains the first, second and third amplifiers, the counter block is made in the form of the first and second counters, the first and second coincidence circuits, the control trigger and you one gates, and the control unit is made in the form of the first and second triggers and an input valve, so that the label sensor through the first amplifier is connected in parallel to the inputs of the matching circuits, respectively connected with the first and second counters, the outputs of the first of which are connected to the buses through the output valves digital computer (digital computer), the bmw sensor through the third amplifier is connected in series with the installation inputs of the second and first triggers and the first counter, the process start sensor through the second amplifier and the trigger trigger The phenomenon is connected in parallel with the other input of the second coincidence circuit, the inputs of the second counter and input gates connected by one input to the digital bus and the single input of the first trigger, and the output - with the single input of the second trigger connected to the other input of the first coincidence circuit [2], The main disadvantage of this device is the small accuracy of measuring the angular position of the crankshaft, especially at the time of starting fuel injection with uneven angles of rotation speed of the crankshaft of the engine within one turnover, as well as the impossibility of taking measurements within each engine revolution.

Цель изобретения - повышение точности определения углового положения вала.The purpose of the invention is to increase the accuracy of determining the angular position of the shaft.

Указанная цель достигается тем, что в блок счетчиков дополнительно включен дешифратор, а в блок управления - третий триггер, причем дешифратор включен на выходах второго счетчика и соединен параллельно с входнйм вентилем и установочным входом триггера управления, а третий триггер выходом подключен к выходным вентилям и шине ЦВМ установочным входом - к выходу первого триггера, а единичным - к выходу второго триггера· зоThis goal is achieved by the fact that a decoder is additionally included in the counter unit, and a third trigger is included in the control unit, the decoder being connected at the outputs of the second counter and connected in parallel with the input valve and the control trigger installation input, and the third trigger is connected to the output valves and the bus by the output Digital input with installation input - to the output of the first trigger, and single - to the output of the second trigger

На чертеже приведена схема устройства дЛя определения углового положения коленчатого вала.The drawing shows a diagram of a device for determining the angular position of the crankshaft.

Устройство содержит размещенный в блоке 1 информационных сигналов источник счетных импульсов, включающий зуб-55 чатый диск 2, жестко связанный с коленчатым валом 3 двигателя, и датчик 4 угловых меток, через усилитель 5 и схемы 6 и 7 совпадения подключенный к счетчику 8 выработки кода углового положения вала и счетчику 9 выработки кода синхронизирующего сигнала блока 10 счетчиков, источник сигнала начала счета, включающий датчик 11 начала подъема клапана форсунки, подключенный через усилитель 12 к единичному входу триггера 13 управления, выход которого подсоединен· ко второму входу схемы 7 совпадения, к установочным входам счетчика 9 и входному вентилю 14 блока 15 управления; источник сигнала окончания счета, включающий командный лепесток 16, жестко связанный с коленчатым валом 3, и датчик 17 верхней мертвой точки, через усилитель 18 подключенный к установочному входу триггера 19 управления, выход которого подключен ко второму- входу схемы 6 совпадения, и счетному входу триггера 20 управления, а единичный вход триггера 19 подключен к входному вентилю 14, триг гер 21 управления, единичным входом подключенный к шине 22 ЦВМ и входному вентилю 14, и. установочным входом соединенный со вторым выходом триггераThe device contains a source of counting pulses located in the information signals block 1, including a tooth-55 shaped disk 2, rigidly connected to the crankshaft 3 of the engine, and an angle mark sensor 4 through an amplifier 5 and matching circuit 6 and 7 connected to the counter 8 for generating an angular code the position of the shaft and the counter 9 of the generation of the synchronization signal code of the counter unit 10, the source of the counting start signal, including the nozzle valve lift start sensor 11 connected through an amplifier 12 to a single input of the control trigger 13, the output of which it is connected · to the second input of the coincidence circuit 7, to the installation inputs of the counter 9 and the input valve 14 of the control unit 15; a signal source for the counting end, including a command lobe 16, rigidly connected to the crankshaft 3, and a top dead center sensor 17, through an amplifier 18 connected to the installation input of the control trigger 19, the output of which is connected to the second input of the matching circuit 6, and the counting input of the trigger 20 control, and a single input of the trigger 19 is connected to the input valve 14, trigger ger 21 controls, a single input connected to the bus 22 of the computer and the input valve 14, and. installation input connected to the second trigger output

19, а выходом подключенный к установочным входам счетчика 8 и триггера19, and the output connected to the installation inputs of the counter 8 and trigger

20, выходные вентили 23, связанные с шинами 24 ЦВМ, счетчиком 8 и триггером. 20, выход последнего подключен к шине 25 ЦВМ; дешифратор 26, входами подключенный к счетчику 9, а выходами - к входному вентилю 14 и установочному входу триггера '13.20, output valves 23 associated with the buses 24 of the digital computer, counter 8 and the trigger. 20, the output of the latter is connected to the bus 25 of the digital computer; the decoder 26, the inputs connected to the counter 9, and the outputs to the input valve 14 and the installation input of the trigger '13.

Устройство работает следующим образом.The device operates as follows.

При вращении зубчатого диска 2, жестко связанного с коленчатым валом 3 двигателя, в датчике 4 угловых меток при прохождении под ним зубцов диска наводятся сигналы угловых меток. С валом 3 двигателя жестко связан командный лепесток 16, установленный таким образом, что при прохождении под датчиком 17 верхней мертвой точки поршень находится в верхней мертвой точке, а в датчике 17 наводится сигнал отметки верхней мертвой точки.When the rotation of the gear disk 2, rigidly connected with the crankshaft 3 of the engine, in the sensor 4 angular marks when passing under it the teeth of the disk signals are angled marks. A command lobe 16 is rigidly connected to the engine shaft 3, which is installed in such a way that when the piston passes under the top dead center sensor 17, it is at the top dead center and the signal of the top dead center mark is induced in the sensor 17.

В исходном состоянии схемы б и 7, входной вентиль 14 и выходные вентили 23 заперты. Импульсы угловых меток с выхода датчика 4 на вход счетчика 8 выработки кода, углового положения вала и на вход счетчика 9 выработки кода синхронизирующего сигнала не проходят. При поступлении с выхода ЦВМ по шине 22 команды на измерение входной вентиль 14 открывается по входу, а триггер 21 управления переводится в единичное состояние и подтверждает установку в исходное состояние счетчика 8 и триггера 20 управления.In the initial state of circuit b and 7, the input gate 14 and the output valves 23 are locked. The pulses of the angle marks from the output of the sensor 4 to the input of the counter 8 generate the code, the angular position of the shaft and to the input of the counter 9 generate the code of the synchronization signal do not pass. When received from the output of the digital computer via the measurement command 22, the input valve 14 opens at the input, and the control trigger 21 is brought into a single state and confirms the initial setting of the counter 8 and the control trigger 20.

При подаче топлива в форсунку топливным насосом в момент подъема клапана форсунки происходит впрыск топлива и одновременно наводится сигнал в датчике 11 начала подъема клапана форсунки. По этому сигналу триггер 13 управления переводится в единичное состояние, в результате чего схема 7 совпадения открывается, с установочных входов счетчика 9 снимается сигнал запрета, входной вентиль 14 открывается по третьему входу и на его выходе появляется сигнал, по которому триггер 19 управления переводится в единичное состояние. При этом триггер 21 управления переводится в исходное состояние, тем самым снимая сигналы запретов с установочных вхо-> дов счетчика 8 и триггера 20, а схема 6 совпадения тоже открывается и 55 импульсы угловых меток с выхода датчика 4 начинают заполнять счетчики 8 и 9.When fuel is injected into the nozzle by the fuel pump at the moment of raising the nozzle valve, fuel is injected and a signal is simultaneously induced in the sensor 11 for starting the nozzle valve lift. According to this signal, the control trigger 13 is brought into a single state, as a result of which the coincidence circuit 7 is opened, the inhibit signal is removed from the installation inputs of the counter 9, the input valve 14 is opened at the third input and a signal appears at its output, by which the control trigger 19 is translated into a single state. In this case, the control trigger 21 is reset, thereby removing the prohibition signals from the installation inputs of counter 8 and trigger 20, and coincidence circuit 6 also opens and 55 impulse angle marks from the output of sensor 4 begin to fill counters 8 and 9.

С переходом счетчика 9 в первое . состояние с выхода дешифратора 26 поступает сигнал запрета на вход вентиля 14.With the transition of counter 9 to the first. the state of the output of the decoder 26 receives a signal of a ban on the input of the valve 14.

При заполнении счетчика 9 импульсами угловых меток до состояния, несколько превышающего состояние счетчика 9 и соответствующего максималь ному углу впрыска топлива, на втором выходе дешифратора 26 появляется сигнал, по которому триггер 13 переводится в исходное состояние, входной вентиль 14 по второму входу отпирается, а по третьему запирается,.When the counter 9 is filled with angle mark pulses to a state slightly higher than the state of the counter 9 and corresponding to the maximum fuel injection angle, a signal appears at the second output of the decoder 26, by which the trigger 13 is restored to its initial state, the input valve 14 is unlocked at the second input, and the third is locked.

С приходом следующего импульса от датчика 11, т. е. с началом следующего впрыска' топлива, цикл работы счетчика 9 повторяется.With the arrival of the next impulse from the sensor 11, i.e., with the beginning of the next injection of fuel, the cycle of the counter 9 is repeated.

С приходом сигнала от датчика 17 верхней мертвой точки триггер 19 переводится в исходное состояние. В результате снимается сигнал запрета с установочно’го входа триггера 21, схема 6 совпадения запирается, поступление импульсов угловых меток на счет- 15 чик 8 прекращается, а триггер 20 по счетному входу переводится в единичное состояние, отпирая тем самым выходные вентили 23 и посылая сигнал готовности по· шине 25 на ЦВМ. В счеТчике 8 20 фиксируется число, соответствующее количеству импульсов угловых меток, поступающих с выхода датчика 4 с момента начала впрыска топлива до момента привода сигнала с выхода датчика 17.With the arrival of the signal from the sensor 17 top dead center trigger 19 is returned to its original state. As a result, the prohibition signal is removed from the installation input of trigger 21, the coincidence circuit 6 is locked, the receipt of angle mark pulses to the counter-15 clock 8 is stopped, and the trigger 20 is converted to a single state at the counting input, thereby unlocking output valves 23 and sending a signal availability on bus 25 on a digital computer. In the counter 8 20 a number is recorded corresponding to the number of pulses of angle marks coming from the output of the sensor 4 from the moment the fuel injection starts until the signal is driven from the output of the sensor 17.

Таким образом, определяется угловое положение' коленчатого вала в момент начала впрыска топлива. Результаты измерения через открытые выход-’ ные вентили 23 посылаются по шинам *0 24 на вход ЦВМ. С приходом по шине 22 очередной команды цикл измерения повторяется.Thus, the angular position of the crankshaft is determined at the moment the fuel injection begins. The measurement results are sent via open output gates 23 via buses * 0 24 to the input of the digital computer. With the arrival of the next command on bus 22, the measurement cycle repeats.

Снабжение устройства дополнительным установленным в блоке управления 35 триггером, подключенным одним входом к счетчику выработки кода углового положения вала и через один из триггеров блока - к выходу ЦВМ, а вторым входом через другой триггер блока к ДО входному вентилю и выходом к выходным вентилям блока счетчиков и входу ЦВМ_Га также дешифратором, размещенным в блоке счетчиков, подключенным к счетчику выработки кода синхронизирующего ,, сигнала, входному вентилю блока управления и триггеру блока счетчиков, выход которого соединен со входами упомянутых счетчика и вентиля, и выполнение источника счетных импуль- __ сов в виде жестко связанного с валом ^эозубчатого диска позволяет повысить точность определения углового положения коленчатого вала двигателя в момент начала впрыска топлива за счет исключения составляющей погрешности 55 определения углового положения вала, зависящей от неравномерности угловой скорости вращения вала в пределах одного оборота. Кроме того, предлагаемое устройство позволяет производить измерение на каждом обороте двигателя, что повышает его быстродействие примерно в два раза по сравнению с известным.Supplying the device with an additional trigger installed in the control unit 35, connected to the input of the digital computer through one of the triggers of the shaft, and through one of the triggers of the block to the computer output, and the second input through the other trigger of the block to the DO input gate and output to the output valves of the meter block and Valid DCM _T and decoder placed in the block of counters, the counter connected to the synchronizing code generating ,, signal input valve control unit and the trigger block counter whose output is connected to a odes of said counter and gate, source and performing counting pulses __ cos a shaft rigidly associated with the toothed disk ^eo improves the accuracy of determining the angular position of the engine crankshaft at the start of fuel injection by eliminating the error component 55 for determining the angular position of the shaft, depending on uneven angular velocity of rotation of the shaft within one revolution. In addition, the proposed device allows measurement at each revolution of the engine, which increases its speed by about two times compared with the known.

Claims

The invention relates to the testing of machines, in particular, to the measurement of the parameters of motors, namely, to the determination of the angular position of the knee of the crankshaft of the engine of its early (two) at the time of the start of fuel injection. A device for measuring the angular position of the shaft, containing a source of counting pulses, is connected via a series-connected pulse shaper, a frequency converter to a voltage, a control oscillator and a pulse selector to a reading device, while the second inputs of the generator and the selector are connected to the output of the pulse shaper, and the second input of the reading device to the output of the generator L11. the disadvantages of the known device are the large measurement error and the impossibility of determining with it the angular position of the crankshaft. at the moment of the start of fuel injection due to the absence of a signal determining the start of this injection. It is also known a device for determining the angular position of the crankshaft, which contains a block of information signals, connected through an amplifier block to a counter block and a control block, the block of information signals made in the form of an angle marker marker, a mark sensor, an upper dead center mark (mWT) sensor vmt and sensor of the beginning of the process, the amplifier unit contains the first, second and third amplifiers, the counter block is made in the form of the first and second counters, the first and second coincidence circuits, the control trigger and you one valve, and the control unit is designed as a ViepBoro and a second trigger and an input valve, so that the tag sensor is connected through the first amplifier in parallel to the inputs of the matching circuits connected respectively to the first and second counters, the outputs of the first of which are connected to the output valves digital computer machine (digital computer) tires, a vmt sensor through the third amplifier is connected in series with the installation inputs of the second and first triggers and the first counter, the sensor of the beginning of the process through the second amplifier and control trigger It is connected in parallel with another input of the second coincidence circuit, inputs of the second counter and input valves connected by one input to the digital computer bus and the single input of the first trigger, and the output to the single input of the second trigger connected to another input of the first coincidence circuit 2 The main disadvantage of this device is the low accuracy of measuring the angular position of the crankshaft, especially at the time of the start of fuel injection, with uneven rotational speed of the crankshaft of the engine within one company, as well as the inability of the measurement vpredelah each engine revolution. The purpose of the invention is to improve the accuracy of determining the angular position of the shaft. This goal is achieved by the addition of a remoter to the meter block, and a third trigger to the control block, the decoder is connected at the outputs of the second counter and connected in parallel with the input valve and the control trigger input, and the third trigger output is connected to the output gate and bus digital computer installation input - to the output of the first trigger, and a single - to the output of the second trigger. In the drawing, e is a diagram of a device for determining the angular position of the crankshaft. The device contains a source of counting pulses placed in block 1 of information signals, including a toothed disk 2 rigidly connected to the engine crankshaft 3, and an angle marker sensor 4, through amplifier 5 and coincidence circuits 6 and 7, connected to the counter the position of the shaft and the counter 9 of the generation of the synchronization signal code of the block of 10 counters, the source of the start of counting signal, including the sensor 11, the start of the nozzle valve raising, connected through the amplifier 12 to the unit input of the control trigger 13, the output to torogo connected to the second input of matching circuit 7, for adjusting the inputs of the counter 9 and the inlet valve 14 or driving unit 15; The source of the counting signal, which includes the command tab 16 is rigidly connected to the crankshaft 3, and the top dead center sensor 17 through an amplifier 18 connected to the installation input of the control trigger 19, the output of which is connected to the second input of the matching circuit 6, and the counting input of the trigger 20 control, and the single input of the trigger 19 is connected to the input valve 14, three ger 21 controls, a single input connected to the bus 22 of the digital computer and the input B (entile 14, and the installation input connected to the second output of the trigger 19, and the output Connected to the installation inputs of the counter 8 and the trigger 20, the output valves 23 associated with tires 24 CVM, counter 8 and trigger 20, the output of the latter is connected to the bus 25 CVM; the decoder 26, the inputs connected to the counter 9, and the outputs to the input valve 14 and the installation input is three years 3. The device operates as follows: When rotating the aubat disk 2, which is rigidly connected to the engine crankshaft 3, in the sensor 4 of the corner marks, the signals of the corner marks are induced when the teeth of the disk pass through it. With the motor shaft 3, the command lobe 16 is rigidly connected, which is installed in such a way that when the top dead center passes under the sensor 17, the piston is at the top dead center, and in the sensor 17, the top dead center point signal is induced. In the initial state of circuits b and 7, the inlet valve 14 and the outlet valves 23 are closed. Pulses of angular tags from the output of the sensor 4 to the input of the counter. 8, the code, the angular position of the shaft and the input of the counter 9 to generate the code of the synchronizing signal do not pass. When the output from the output of the digital computer via the bus 22 to the measurement command, the input valve 14 opens on the input, and the control trigger 21 is set to one and confirms the setting to the initial state. the counter 8 and the trigger 20 control. When fuel is supplied to the nozzle by the fuel pump at the moment of raising the nozzle valve, fuel is injected and at the same time a signal is sent in the sensor 11 to start raising the nozzle valve. By this signal, the control trigger 13 is switched to the single state, as a result of which the coincidence circuit 7 opens, the inhibit signal is removed from the installation inputs of the counter 9, the input valve 14 opens on the third input, and the control trigger 19 appears on its output translates to a single state. In this case, the control trigger 21 is reset, thereby removing the inhibit signals from the installation inputs of the counter 8 and the trigger 20, and the matching circuit 6 also opens and the impulses of the angular marks from the output of sensor 4 begin to fill the counters 8 and 9. With the transition of the counter 9 to the first state from the output of the deistrator 26, a signal is received. The signal is prevented from entering the valve 14. When the counter is filled with 9 pulses of angular marks to a state of several turns of the counter, 9 and the corresponding maximum fuel injection angle When the output of decoder 26 appears, a signal appears by which the trigger 13 is reset, the input valve 14 is unlocked at the second input, and the third is locked -. With the arrival of the next pulse from sensor 11, i.e. with the start of the next fuel injection, the cycle of operation of counter 9 is repeated. With the arrival of the signal from the upper dead center sensor 17, the trigger 19 is reset to the initial state. As a result, the prohibition signal is removed from the set-up input of the trigger 21, the coincidence circuit 6 is blocked, the arrival of the angular mark pulses to the counter 8 is stopped, and the trigger 20 at the counting input is switched to one, unlocking the output valves 23 and sending the ready signal to the bus 25 on a digital computer. 8, a number is recorded corresponding to the number of pulses of the angular marks coming from the output of sensor 4 from the moment of the start of fuel injection to the moment of driving the signal from the output of sensor 17. Thus, the angular position of the crankshaft at the moment of the start of fuel injection is determined. The measurement results through the open output valves 23 are sent over the tires 24 to the input of the digital computer. With the arrival of the next instruction bus 22, the measurement cycle is repeated. Supply of the device with an additional trigger installed in the control unit, connected by one input to the code generation counter of the shaft angle and through one of the block triggers to the digital computer output, and the second input through the other trigger of the block to the input valve and output to the output valves of the counter block and the input A digital computer as well as a decoder located in the meter block, connected to the counter of the generation of the clock signal code, the control unit input valve and the meter block trigger, the output of which is connected to the inputs said counter and valve, and performing a source of counting pulses in the form of a toothed disk rigidly connected to the shaft improves the accuracy of determining the angular position of the engine crankshaft at the moment of the start of fuel injection by eliminating the component of the error determining the angular position of the shaft depending on the unevenness angular speed of rotation of the shaft within one revolution. In addition, the proposed device makes it possible to measure at each revolution of the engine, which increases its speed by about two times compared with the known one. The invention The device for determining the angular position of the crankshaft, which holds the block of information signals connected through the block of amplifiers to the block of counters and the control block,. the block of informational C11 signals is made in the form of an angle marker marker, a tag sensor, a top dead center marker (vmt), a vmt sensor and a process start sensor, the amplifier block contains the first, second and third amplifiers, the counter block is designed as the first and second counters, first and second coincidence circuits, control trigger and output veins. and the control unit is made in the form of the first and second triggers and input video, so that the tag sensor is connected through the first amplifier in parallel to the inputs of the matching circuits connected respectively to the first and second counters, the outputs of the first of which are connected to a digital computer (digital computer), sensor vmt through the third amplifier. connected in series with the installation inputs of the second and first triggers and the first counter, the sensor of the beginning of the process through the second amplifier and the trigger is controlled and connected in parallel with another input of the second coincidence circuit, the inputs of the second counter and the input valve connected with one input with a digital computer and a single input of the first trigger, and the output with a single input of the second trigger connected with another input of the first coincidence circuit, It is distinguished by the fact that, in order to improve accuracy, the meter block is additionally included a decoder, and a third trigger in the control unit, the decoder being connected at the outputs of the second meter and connected in parallel with the input valve and the adjusting input A third control trigger is connected to the output valves and busbars, a setup input to the output of the first trigger, and a single input to the output of the second trigger. Sources of information taken into account in the examination 1. USSR author's certificate No. 590673, cl. G 01 P 3/48, 1978..

2. USSR author's certificate 136098, cl. G 08 C 9/04, 1961.