SU1003012A1

SU1003012A1 - Time interval meter

Info

Publication number: SU1003012A1
Application number: SU813351204A
Authority: SU
Inventors: Татьяна Алексеевна Мадяр; Станислав Гаврилович Баковецкий
Original assignee: Предприятие П/Я М-5783
Priority date: 1981-11-04
Filing date: 1981-11-04
Publication date: 1983-03-07

Description

(54) ИЗМЕРИТЕЛЬ ВРЕМЕННЫХ ИНТЕРВАЛОВ(54) TIMER INTERVAL METER

Изобретение относитс к радиоизмерительной технике, может быть использовано в приборах дл измерени временных интервалов, а также в системах телеметрии.The invention relates to a radio measuring technique, can be used in instruments for measuring time intervals, as well as in telemetry systems.

Известен измеритель длительности временных интервалов с циркул цией импульса в замкнутом контуре с посто нным периодом обращени , содержащий элемент ИЛИ, первый и второй элементы задержки, элемент И и счетчик С 1Т. A known measure of the duration of time intervals with the circulation of a pulse in a closed loop with a constant circulation period, contains the OR element, the first and second delay elements, the AND element and the C 1T counter.

Недостатками этого устройства вл ютс большое врем измерени и большой объем устройства.The disadvantages of this device are the large measurement time and the large volume of the device.

Наиболее близким по технической сущности к изобретению вл етс преобразователь временного интервала в код, содержащий элемент ИЛИ, две последовательно соединенные линии задержки, элемент И и счет;чик t2 1,The closest in technical essence to the invention is a time interval converter into a code containing an OR element, two serially connected delay lines, an AND element and an account; a t2 tick,

Недостатками этого устройства вл ютс низкое быстродействие и большей объем оборудовани , обусловленный наличием линии задержки и большим временем задержки,The disadvantages of this device are low speed and a large amount of equipment, due to the presence of a delay line and a long delay time,

Целью изобретени вл етс повышение быстродействи .The aim of the invention is to increase speed.

Поставленна цель достигаетс тем, что в измеритель временных интервалов , содержащий элемент ИЛИ, выход которого соединен с входом первого элемента задержки, второй элемент задержки, вход которого подключен к первому входу элемента И, счетчик, введены дополнительно первый и второй инверторы и второй элемент И, причем инверсные выходы пер-вого и второго элементов И соединены The goal is achieved by the fact that in the time interval meter containing the OR element, the output of which is connected to the input of the first delay element, the second delay element whose input is connected to the first input of the AND element, the counter, is additionally introduced the first and second inverters and the second And element, moreover, the inverse outputs of the first and second elements And are connected

10 с соответствующими входами элемента ИЛИ, выход элемента ИЛИ подключен к входу счетчика, выход первого элемента задержки через первый инвертор подключен к первому входу 10 with the corresponding inputs of the element OR, the output of the element OR is connected to the input of the counter, the output of the first delay element through the first inverter is connected to the first input

15 второго элемента И, второй вход которого соединен с входом устройства и входом второго элемента задержки, выход которого через второй инвертор 2Q подключен к второму входу первого элемента И,15 of the second element And, the second input of which is connected to the input of the device and the input of the second delay element, the output of which through the second inverter 2Q is connected to the second input of the first element And,

На фиг. 1 представлена структурна электрическа схема измерител нафиг. 2 --временные диаграммы, по сн ющие его работу.FIG. Figure 1 shows the structural electrical circuit of the meter. 2 - time diagrams for his work.

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Измеритель содержит элемент ИЛИ 1, первый и втоЕЮй элементы 2 и 3 задержки , первый элемент И 4, счетчик 5, первый и второй инверторы б и 7 The meter contains the element OR 1, the first and second elements 2 and 3 of the delay, the first element And 4, the counter 5, the first and second inverters b and 7

Claims

30 and the second element AND 8. The delay time of the first delay element, which determines the accuracy and cycle of the pulse, is chosen to be somewhat longer than the delay time of the second delay element, determined by the resolution of the chips on which the meter can be performed. The device works as follows. The measured time interval t (Fig. 2a) is fed to the input of the delay element 3 and to the inputs of the And 4 and, 8 elements. A delayed time interval of quantization 1dz2 D / 2 in the delay element 3, for example, is inverted in inverter 7 and fed to the second input of the first element And 14 (Fig. As a result, a zero level pulse appears at the inverse output of the first element 4) whose duration is equal to the delay time of the second delay element (Fig. 2c). This pulse, passed through the OR element 1 (Fig. 2d), is fed to the input of counter 5 and to the input of the delay element 2, which is delayed by one in and inverter 6 post the input element And 8 (Fig. 2d) At the inverse output of the second element And 8 at this moment a zero level pulse appears (Fig. 2e), which also passes through the element OR 1 and goes again to counter 5 and to the input of the first element 2. Delay. The pulse circulation continues until the measured pulse 1 is terminated (Fig. 2a) at the first input of the second element AND 8. Finally, the counter 5 records the number of pulses, f S - Z A From where the duration of the time interval is equal. Thus, the interval measurement time is equal to its duration, and the delay time is determined only by the quantization discrete value. So, this device has advantages in terms of volume and time of measurement. These two advantages exclude the restriction on the use of the device for measuring time intervals of longer duration. The device also retains the accuracy of the measurement of the time interval. The invention The time interval meter containing an OR element, the output of which is connected to the input of the first delay element, a counter, a second delay element, the input of which is connected to the first input of the AND element, which is characterized in that, in order to improve speed, the first and the second inverter and the second element and, the inverse outputs of the first and second elements AND are connected to the corresponding inputs of the element OR, the output of the element OR is connected to the input of the counter, the output of the first delay element through the first the inverter is connected to the first input of the second element I, the second input of which is connected to the input of the device and the input of the second delay element, the output of which through the second inverter is connected to the second input of the first element I. 708293, cl. C, 04 F 10/04, 1977.

2. USSR author's certificate number 699486, cl. G 04 F 10/04, 1978.

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