SU702311A2

SU702311A2 - Digital meter for measuring the length of periodic pulses

Info

Publication number: SU702311A2
Application number: SU782612809A
Authority: SU
Inventors: Юрий Федорович Пермяков; Борис Михайлович Рачков
Original assignee: Предприятие П/Я А-1001
Priority date: 1978-05-10
Filing date: 1978-05-10
Publication date: 1979-12-05

Description

1one

: Изобретение относитс к радиоиз мерительной технике, может быть использовано при построении цифровых измерителей длительности периодических импульсов. .: The invention relates to radio measurement technology, can be used in the construction of digital meters of the duration of periodic pulses. .

Известно устройство, содержащее триггер, фильтр, ключ, генератор линейно нарастающего напр жени , фазовый модул тор, формирующий каскад, блок антисовпадений и счетчик 1.A device comprising a trigger, a filter, a key, a linearly rising voltage generator, a phase modulator, a shaping stage, an anti-coincidence unit, and a counter 1 is known.

Недостаток известного устройства низка точность измерени .A disadvantage of the known device is low measurement accuracy.

Цель изобретени - повышение точности измерени импульсов.The purpose of the invention is to improve the accuracy of pulse measurement.

Эта цель достигаетс тем, что а устройство, содержащее фильтр и блок антисовпадений, последовательно соединенные триггер, генератор линейно нарастающего напр жени , фазовый модул тор , формирующий каскад, ключ и счетчик, ВХОД которого подключен к первому ВХОДУ блока антисовпадений, второй ВХОД которого соединен с выходом формирующего каскада, выход блока антисовпадений поключен ко второму ВХОДУ генератора линейно нарастающего напр жени и к первому входу триггера, второй вход которого подключен ко второму ВХОДУ ключа и ко ВХОДУ фильтра, выход которого сое;динен со вторым входом фазового модул тора , введены первый дополнительный и второй дополнительный триггеры, последовательно соединенные инвертор, первый элемент совпадени , третий дополнительный триггер и второй элемент совпад(эни , второй вход которого подключен к входу счетчика, а выход соединен до входом второго до0 полнительного триггера. При этом . ВХОД инвертора соединен со вторым. ВХОДОМ триггера и с первым входом первого дополнительного триггера, второй ВХОД которого подключен к вы5 ходу формирующего каскада; выход пер ,вого дополнительного.триггера соединен со вторым ВХОДОМ первого элемента совпадени , а второй вход третьего дополнительного триггера подклю0This goal is achieved by the fact that a device containing a filter and an anti-coincidence unit, connected in series by a trigger, a linearly increasing voltage generator, a phase modulator forming a cascade, a key and a counter, whose INPUT is connected to the first INPUT of the anti-coincidence unit, the second INPUT of which is connected to the output of the forming cascade, the output of the anti-coincidence unit is connected to the second INPUT of the linearly increasing voltage generator and to the first input of the trigger, the second input of which is connected to the second INPUT of the key and to the INPUT of the filter tra, whose output is soy; dinne with the second input of the phase modulator, the first additional and second additional triggers are introduced, the inverter connected in series, the first match element, the third additional trigger and the second element coincide (Eni, whose second input is connected to the counter input, and the output connected to the input of the second additional trigger. At the same time, the INPUT of the inverter is connected to the second. INPUT of the trigger and to the first input of the first additional trigger, the second INPUT of which is connected to the output of the forming cascade; the output of the first additional trigger. It is connected to the second INPUT of the first element of the match, and the second input of the third additional trigger is connected

,чен к ВЫХОДУ блока антисовпадений., chen to the OUT of block antisubmarine

На чертеже изображена структурна электрическа схема устройства.The drawing shows a structural electrical circuit of the device.

Устройство содержит триггер 1, The device contains a trigger 1,

5 фильтр 2, ключ 3, генератор 4 линейно нарастающего напр жени , фазовый модул тор 5, формирующий каскад 6. блок 7 антисовпадений, счетчик 8,инвертор 9, элемент 10, 11 совпадений, 5 filter 2, key 3, generator 4 of linearly increasing voltage, phase modulator 5, forming cascade 6. anti-coincidence unit 7, counter 8, inverter 9, coincidence element 10, 11,

Claims

0 additional triggers 12-14. The device works as follows. Periodic pulses are applied to the inputs of the trigger 1, filter 2, key 3, inverter 9 and trigger 12. Under the action of the leading edge of the first pulse 1 and. 12 is set to state 1. Trigger 1 13pusts ramp voltage generator 4. Filter 2 selects the first harmonics of the pulses, and the α-phase modulator 5, through the forming cascade b, supplies the key 3 with quantum pulses, which gates the measured pulse and are stored on the counter 8, the first quantizing pulse sets trigger 12 to the state O, For the time between the front the front of the first pulse and the first quantizing pulse, element 10 was opened by trigger 12, but closed by inverting the measured pulse. If during the time between the leading edge and the quantum impulses there was a failure im. pulse, through inverter 9 it is memorized with trigger 13, which opens element 11, and with a signal from the key 3 the state of trigger 13 through open element 11 is rewritten into trigger 14, the leading edge of the second pulse sets the trigger again and opens element 10 already time, i.e. from the leading front to the second quantizing pulse, etc. If during the time between the leading edge and any quantizing impulse there was a dip or one impulse was finished and another one started, it fixes on trigger 14. The last impulse impulse is generated after the trailing edge of the measured impulse and, after passing through block 7, sets triggers 1, 13 in O. and resets the generator 4, Between the leading edges} of the last pulse and the last quitting pulse — there was a failure, because the falling front came before the quantizing pulse, and this was remembered at trigger 13, but there will be no false information, as the trigger 13 is not rewritten into the trigger 14 due to the absence of a pulse from the key 3. The pulse from block 7 is used to remove the information of the meter 8 and the trigger 14, as well as to reset them before the next measurement. Using this device allows you to fix dips of the pulse, both single and multiple during the time between the leading edge of the pulse and the quantizing pulse, and the duration of the fixed dips is determined by the trigger response time. The invention digital pulse duration meter for auth. St. No. 321764 ,. characterized in that, in order to improve measurement accuracy, the first additional and second additional triggers, the inverter connected in series, the first match element, the third additional trigger and the second match element, the second input of which is connected to the counter input and the output connected to the input of the second additional trigger, while the input of the inverter is connected, is not connected with the second input of the trigger, and the first input of the first additional trigger, the second input of which is connected to the output of the forming circuit kada, the output of the first additional trigger is connected to the second input of the first coincidence element, and the second input of the third additional trigger is connected to the output of the anti-lock block. Sources of information taken into account in the examination of l.iABTopcKoe USSR certificate No. 321764-, G 01 R 23/00, 23.03.70.