SU919090A1

SU919090A1 - Device for monitoring operation of counter with potential output

Info

Publication number: SU919090A1
Application number: SU792722458A
Authority: SU
Inventors: Юрий Яковлевич Берсон; Михаил Алексеевич Рябов; Евгений Яковлевич Марголин
Original assignee: Предприятие П/Я Г-4152
Priority date: 1979-02-07
Filing date: 1979-02-07
Publication date: 1982-04-07

Description

Изобретение относится к дискретной автоматике и импульсной технике и может быть использовано для обнаружения неисправности двоичных счетчиков.The invention relates to discrete automation and pulse technology and can be used to detect malfunctions of binary counters.

Известно устройство для контроля работы двоичного счетчика, содержащее счетные ячейки 44 логические элементы [ί] .A device for monitoring the operation of a binary counter containing counting cells 44 logic elements [ί].

Недостатком известного устройства является сложность его техничес- ¹⁰кой реализации.A disadvantage of the known device is the complexity of its implementation tehniches- ¹⁰ Coy.

Наиболее близкое к предлагаемому устройство для контроля работы счетчика с потенциальными.выходами.содержащее контролируемый счетчик, два ¹⁵элемента И, два триггера и элемент ИЛИ [2].Closest to the proposed device for monitoring the operation of the counter with potential outputs. Containing a controlled counter, two ¹⁵ AND elements, two triggers and an OR element [2].

Недостатком данного технического решения является низкая достоверность контроля счетчика, обусловленная отсутствием возможности обнаружения неисправности типа останов счетчиЦель изобретения - повышение достоверности контроля счетчика с потенциальными выходами.The disadvantage of this technical solution is the low reliability of the counter control, due to the lack of the possibility of detecting malfunctions such as stopping the counter. The aim of the invention is to increase the reliability of counter control with potential outputs.

Поставленная цель достигается тем, что в устройство для контроля работы счетчика с потенциальными выходами, содержащее контролируемый счетчик, первые выходы которого поразрядно подключены к входам первого элемента И, а вторые выходы контролируемого счетчика поразрядно подключены к входам второго элемента И, Dt-триггер, единичный вход асинхронной установки которого соединен с выходом первого элемента И, шину тактовых импульсов, подключенную к входу контролируемого счетчика, и выходную шину, единичный выход Dt-триггера подключен к одному из входов второго элемента И, тактовый вход Dt-триггера соединен с входом контролируемого счетчика, информационный вход Dt-триггера соединен с шиной нулевого потенциала, а выход второго элемента И подключен к выходной шине.This goal is achieved by the fact that the device for controlling the operation of the counter with potential outputs contains a controlled counter, the first outputs of which are bitwise connected to the inputs of the first element And, and the second outputs of the controlled counter are bitwise connected to the inputs of the second element And, Dt trigger, single input the asynchronous installation of which is connected to the output of the first AND element, a clock bus connected to the input of the monitored counter, and an output bus, a single output of the Dt trigger is connected to one from the inputs of the second element And, the clock input of the Dt trigger is connected to the input of the monitored counter, the information input of the Dt trigger is connected to the zero potential bus, and the output of the second element And is connected to the output bus.

На чертеже представлена функциональная схема устройства для контроля работы счетчика с потенциальными 5 выходами.The drawing shows a functional diagram of a device for monitoring the operation of the counter with a potential 5 outputs.

Устройство для контроля работы счетчика с потенциальными выходами содержит контролируемый счетчик 1, элементы И 2 и 3» Dt-триггер 4, ши- 10 ну 5 тактовых импульсов, шину 6 нуле· вого потенциала, шину 7 начальной установки, выходную шину 8.The device for monitoring the operation of the counter with potential outputs contains a monitored counter 1, elements And 2 and 3 ”Dt-flip-flop 4, bus 10 well 5 clock pulses, bus 6 zero potential, bus 7 initial installation, output bus 8.

Устройство работает следующим образом. 15The device operates as follows. fifteen

Счетные тактовые импульсы поступают на вход счетчика 1 и на тактовый вход Dt-триггера 4, который под их воздействием устанавливается в 20 нулевое состояние, так как его информационный вход соединен с шиной 6 нулевого потенциала.The counted clock pulses are fed to the input of the counter 1 and to the clock input of the Dt-trigger 4, which, under their influence, is set to zero state, since its information input is connected to the bus 6 of zero potential.

При заполнении счетчика 1 единицами на выходе элемента И 2 появ- 25 ляется сигнал установки Dt-триггера 4 в единичное состояние. Этот сигнал действует в течение одного периода входной частоты и удерживает Dt-триггер 4 в единичном состоянии. Dt-триг-₃₀гер 4 возвращается в исходное состояние по ближайшему действующему значению перепада на его тактовом входе, после прекращения сигнала на его единичном входе. Таким образом, единичный₅сигнал на выходе Dt-триггера 4 сохраняется 1,5 или 2 периода входной частоты £ (в зависимости от полярности переключения Dt-триггера 4 по тактовому входу). При исправной работе счетчика 1,и устройства для контроля при поступлении очередного счетного импульса срабатывают все схемы переноса счетчика 1, все разряды устанавСигнал Верно вырабатывается в каждом цикле исправной работы счетчика и устройства для контроля. При неисправностях или сбоях в работе счетчика типа: отсутствие состояния 1 или 0 в любом разряде, отказ или сбой в цепи переноса, останов счетчика, необходимая временная последовательность сигналов на входах Dt-триггера и элемента И 3 не обеспечивается, и сигнал Верно” не вырабатывается.When the counter 1 is filled with units at the output of the And 2 element, a signal appears of setting the Dt trigger 4 to a single state. This signal is valid for one period of the input frequency and holds the Dt trigger 4 in a single state. Dt-trigger- ₃₀ ger 4 returns to its initial state at the nearest effective value of the differential at its clock input, after the termination of the signal at its single input. Thus, a single ₅ signal at the output of the Dt trigger 4 is saved for 1.5 or 2 periods of the input frequency £ (depending on the polarity of switching the Dt trigger 4 on the clock input). With the correct operation of counter 1, and the monitoring device, when the next counting pulse arrives, all transfer circuits of the counter 1 are activated, all the digits are set. The signal is correctly generated in each cycle of the correct operation of the counter and the monitoring device. In case of malfunctions or malfunctions in the operation of the counter of the type: absence of state 1 or 0 in any category, failure or malfunction in the transfer circuit, stop of the counter, the necessary time sequence of signals at the inputs of the Dt-trigger and element And 3 is not provided, and the signal “True” is not generated .

Таким образом, предлагаемое устройство позволяет повысить достоверность контроля счетчиков с потенциальными выходами.Thus, the proposed device can improve the reliability of the control of meters with potential outputs.

Claims

The invention relates to discrete automation and pulse technology and can be used to detect malfunction of binary counters. A device for controlling the operation of a binary counter containing counting cells and logic elements is known. A disadvantage of the known device is the complexity of its technical implementation. Closest to the proposed device for monitoring the operation of the counter with potential outputs, containing a controlled counter, two AND elements, two triggers and an OR element 2. The disadvantage of this technical solution is the low accuracy of the counter control, due to the inability to detect a malfunction of the counter stop type. The purpose of the invention is to increase the reliability of the meter control with potential outputs. This goal is achieved by the fact that the device for controlling the operation of the counter with potential outputs, contains a controlled counter, the first outputs of which are bitwise connected to the inputs of the first element AND, and the second outputs of the controlled counter are bitwise connected to the inputs of the second element AND, 1) 1- the trigger, the asynchronous installation single input of which is connected to the output of the first element I, the clock pulse bus connected to the input of the monitored counter, and the output bus, the single output of the Dt-trigger is connected to one y input of the second AND gate, the clock input of flip-flop Dt-controlled connected to the input counter data input Dt-flop is connected to zero potential bus. 391 and the output of the second element And is connected to the input bus. The drawing shows the functional diagram of the device for controlling the operation of the counter with potential outputs. The device for controlling the operation of the counter with potential outputs contains a monitored counter 1, elements AND 2 and 3 1 L-trigger, bus 5 clock pulses, bus 6 of zero potential, bus 7 of initial installation, output bus 8. The device operates as follows. The counting clock pulses arrive at the input of the counter 1 and the clock input of the 1L-trigger 4, which under their influence is set to the zero state, since its information input is connected to the bus 6 of zero potential. When the counter is filled with 1 units, at the output of the And 2 element, the signal of setting the Dt-flip-flop k to one state appears. This signal is valid for one period of the input frequency and holds the Dt-trigger ger k in one state. The dt-trig ger A returns to the initial state based on the nearest effective value of the differential at its clock input after the termination of the signal at its single input. Thus, a single signal at the output of the Dt-flip-flop k is stored for 1.5 or 2 periods of the input frequency (depending on the polarity of the switching of the Dt-flip-flop C at the clock input). During the correct operation of counter 1, and the monitoring device, when the next counting pulse arrives, all transfer circuits of counter 1 are triggered, all bits are set to zero, and the True signal appears at the output of AND 3. In general, the elements And 2 and 3 provide decryption of two consecutive combinations of the counter 1. The signal is correctly generated in each cycle of the correct operation of the counter and the control device. In case of malfunctions or malfunctions in the operation of the counter type: no 1 or O condition in any discharge, failure or failure in the transfer chain, stopping of the counter, a time sequence of signals at the inputs of the Dt-trigger and element 3 is not provided, and the signal True, it does not work out. Thus, the proposed device allows to increase the reliability of meter control with potential outputs. The invention The device for controlling the operation of the counter with potential outputs contains a controlled counter, the first outputs of which are bit-wise connected to the inputs of the first element AND, and the second outputs of the controlled counter are bit-wise connected to the inputs of the second element AND, Dt-flip-flop, single input of the asynchronous installation which is connected to the output of the first element I, a clock bus connected to the input of the controlled counter, and an output bus, characterized in that, in order to increase the reliability of the control counter, a single output of the pt-flip-flop is connected to one of the outputs of the second element And, the clock input of the Dt-flip-flop is connected to the input of the controlled counter, the information input of the Dt-flip-flop is connected to the zero potential bus, and the output of the second element And is connected to the output bus. Sources of information taken into account in the examination 1. The author's certificate of the USSR N, cl. H 03 K 21/3, 1976.

2. USSR author's certificate number 416883, cl. H 03 K 21/34, 1971 (prototype).

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