SU983636A1

SU983636A1 - Device for converting time interval to code

Info

Publication number: SU983636A1
Application number: SU802948098A
Authority: SU
Inventors: Валентин Семенович Удалов; Игорь Ромуальдович Ивашкевич
Original assignee: Предприятие П/Я А-1178
Priority date: 1980-07-01
Filing date: 1980-07-01
Publication date: 1982-12-23

Description

Изобретение относитс к аналогодискретным преобразовател м, а именно к преобразовател м временного интервала в код, и может &1ть использовано при построении измерителей величины задержки центра т жести импульсных сих налов в автоматической аппаратуре контрол радиотехнического оборудовани , в радионавигационной аппаратуре и т.п.The invention relates to analog discrete converters, namely, converters of a time interval into a code, and can & 1t be used in constructing measures of the magnitude of the delay of the center of gravity of pulsed signals in automatic control equipment of radio equipment, in radio navigation equipment, and the like.

Известно устройство дл определени ВЕ еменного положени центра т - , жести иъшульсного сигнгша, которое содержит генератор, делитель частоты на два, два триггера, четыре вентил , элементы НЕ, ИЛИ и счетчик 1.A device is known for determining the BE position of the center of t, the tin of an impulse signal, which contains a generator, a frequency divider for two, two triggers, four valves, elements NOT, OR, and counter 1.

Недостатками этого устройства вл ютс низкое быстродействие, так как дл измерени необходима последовательность .периодически повтор ющихс сигналов, необходимость жесткой зависимости периода повторени измер емыхИмпульсов и частоты генератора , а также сложность схелм.The disadvantages of this device are low speed, since the measurement requires a sequence of periodic signals, the need for a hard relationship between the repetition period of measured Impulses and the frequency of the generator, as well as the complexity of the circuits.

Наиболее близким по технической сущности к изобретению вл етс цифровой измеритель центра пр моугольных видеоимпульсов, который содержит генератор, выход которого соеди нен с входом одного вентил непосредственно , с входом другог.о - через делитель частоты на два, выходы вентилей соединены с входами элеме,нта ИЛИ, выход которого соединен с входом счетчика, другой счетчик соединен с входами двух триггеров, выходы котоЕ лх соединены с управл ющими входами вентилей 2.The closest to the technical essence of the invention is a digital meter of the center of rectangular video pulses, which contains a generator, the output of which is connected to the input of one valve directly, to the input of another. Through a frequency divider to two, the outputs of the valves are connected to the inputs eleme, nta OR, the output of which is connected to the input of the counter, another counter is connected to the inputs of two triggers, the outputs of which are connected to the control inputs of the valves 2.

Недостатками известного устройст10 ва вл ютс сложность, а также то, что устройство вырабатывает на выходе импульс, временное положение которого соответствует положению во времени центра измер емого видеоим15 пульса, но не дает количественного результата (отсчета) этого положени .The disadvantages of the known device are the difficulty, as well as the fact that the device generates a pulse at its output, the temporal position of which corresponds to the position in time of the center of the measured video15 pulse, but does not give a quantitative result (reference) of this position.

Целью изобретени вл етс упрощение схемы устройства и расширение его функциональных возможностей за The aim of the invention is to simplify the scheme of the device and expand its functionality beyond

20 счет возможности получени на выходе устройства цифрового кода, соответствующего временному положению центра т жести измер емого импульса.20, the possibility of obtaining at the output of a digital code device corresponding to the temporal position of the center of gravity of the measured pulse.

Поставленна цель достигаетс тем, The goal is achieved by

25 что в устройство, содержащее генератор ,, первый выход которого соединен с входом делител частоты на два, триггер, вход установки в ноль которого соединен с шиной измер емых 25 that the device containing the generator, the first output of which is connected to the input of a frequency divider by two, is a trigger, the input of which is set to zero is connected to the bus of the measured

Claims

30 pulses, the first and second valves, the outputs of which are connected to the inputs of the OR element, the output of which is connected to the counter input, the second output of the generator is connected to the control input of the first valve, the input of which is connected to the forward output of the trigger, the frequency divider output by two connected to the input of the second valve, the control input of which is connected to the installation input to zero of the trigger, the installation output to the unit of which is connected to the start-impulse bus. A schematic of the device is shown in FIG. one; in fig. 2 - diagrams for the operation of the device. The device contains a generator 1, the output of which is connected to the input of the splitter 2 frequency by two and the input of the first valve 3, trigger 4, the input of the unit to which is connected to the bus 5 start-impulses, and the output of the unit to zero with bus 6, the second valve 7, the input of which is connected to the output of the splitter 2 frequencies into two, and the control input to the bus 6, the element OR 8, the inputs of which are connected to the outputs of the valves 3 and 7, and the counter 9, the input of which is connected to the output of the element OR 8.. The principle of operation of the device is as follows. A start-impulse (Fig. 2o) is fed to the bus 5 of the device, with respect to which the time interval is read. This pulse translates trigger 4 into a single state and its output voltage is fed to the control input of valve 3, through which pulses with a period of Tr from the output of generator 1 are fed to the input of counter 9 through the OR element 8. Before the arrival of the leading edge of the measured pulse, the counter accumulates N pulses (Fig. 2c) Nr-C./r, (I) where t is the interval between the leading fronts of the start and measured ISH1ULCES. After the arrival of the measured pulse (Fig. 25) on the bus 6, the trigger 4 is switched to the zero state, the valve 3 is closed, the valve 7 is opened and through it from the 2-time divider at two times the counter 9 receives a pulse 1 with a repetition period. .2 until the end of the measured pulse. As a result, N2 pulses go to counter 9 (Fig.) N2, (2) where, 2 is the duration of the measured pulse. Thus, in the counter 9, the code is fixed. The delay of the start-pulse and the center of gravity of the measured pulse can be recorded (from expressions 1 and 2). Thus, the code recorded in counter 9 expresses the delay between the start-pulse and the center of gravity of the measured pulse of the least significant bit TO. The advantage of the proposed device is that it is suitable for measuring the time interval between single repetitive pulses, allows you to measure the pin of the center of gravity of the measured pulse without distinguishing the position of the center of gravity in time, which allows to avoid intermediate transformations and simplify. Apparatus of the Invention A device for converting a time interval into a code comprising a generator, the first output of which is connected to the input of a frequency divider into two, a trigger, the input of which is set to zero is connected to the bus of measured pulses, the first and second valves, the outputs of which are connected to the inputs of the OR element The output of which is connected to the input of the counter, characterized in that, in order to simplify the circuit and expand the functionality, the second output of the generator is connected to the control input of the first valve, whose input The direct union of the trigger output, the output frequency by two divider is connected to the input of the second gate, a control input coupled to the input for setting to zero the trigger, a set input unit which is connected to the bus start pulses. Sources of information taken into account in the examination 1. The author's certificate of the USSR 180657, cl. G 04 F 10/04, 1966.

2. Authors certificate of the USSR 553588, cl. G 04 F 10/04, 1975.

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9