SU511551A1

SU511551A1 - Digital phase meter

Info

Publication number: SU511551A1
Application number: SU1995824A
Authority: SU
Inventors: Самуил Семенович Кузнецкий; Аврум Меерович Фиштейн; Михаил Борисович Товбис
Original assignee: Институт физики им. Л.В.Киренского СО АН СССР
Priority date: 1974-02-13
Filing date: 1974-02-13
Publication date: 1976-04-25

Description

1one

Изобретение относитс к фазоизмери- тельной технике и может быть исцользован дл измерени сдвига фаз между двум си нусондальными сигналами с помощью подсчета числа импульсов задающего генера- тора, 1ц опсрционального сдвигу фаз за посто нное измерительное врем .The invention relates to a phase-measuring technique and can be used to measure a phase shift between two sinusondal signals by counting the number of pulses of the driving oscillator, 1c of the opshrantial phase shift over a constant measurement time.

Известный цифровой фазометр содержит два канала, каждый из которых состоит из последовательно соединенных формироват&лей и триггеров - делителей, выходы которых подсоединены к общему дл обоих каналов управл емому триггеру, а также по- следовательно соединенные дополнительный формирователь и делитель на два на входе одного из каналов устройства, подключенные к установочным входам триггеров-делителей , два электронных ключа, один из которых соединен с управл емьг 5 триггером а другой - с генератором квантующих им-. пульсов и врем задающей схемой.The known digital phase meter contains two channels, each of which consists of series-connected form & le and trigger - dividers, the outputs of which are connected to a common controlled trigger for both channels, as well as successively connected additional driver and divider at two at the input of one of Channels are devices connected to the setup inputs of trigger-dividers, two electronic keys, one of which is connected to control 5 of the trigger and the other to a quantizing generator. pulses and time master circuit.

В известном фазометре при переходе из режима измерени больших углов к измерению малых углов вблизи мертвой зоны измен етс масштаб преобразовани фазо- In the known phase meter, when moving from the measurement mode of large angles to the measurement of small angles near the dead zone, the scale of the phase transformation changes

вого интервала в код. Это усложн ет работу с фазометром, увеличивает врем , не- обхо,аимое на одно измерение, и затрудн ет автоматизацию процесса измерени .interval in the code. This complicates the work with the phase meter, increases the time needed for one measurement, and makes it difficult to automate the measurement process.

Цель изобретени - обеспечить измере нне фазовых сдвигов в диапазоне О-360 без изменени масштаба преобразовани фазового интервала в код при переходе из режима измерени больших углов к изм рению малых углов вблизи мертвой зоны .The purpose of the invention is to provide measurement of phase shifts in the range O-360 without changing the scale of converting the phase interval to the code during the transition from measuring large angles to measuring small angles near the dead zone.

Это достигаетс тем, что фазометр снабжен дополнительным управл емым триг« гером, дополнительным электронным ключом сумматором, коммутатором и четьфьм схемами совпадени , попарно-параллельно подключенными к выходам формирователей в каналах устройства, причем выходы каж дои пары схем совпадени соединены со входами триггеров-делителей и управл вмых триггеров, вторые входы схем совпадени в каждом канале объединены между собой и со входом триггера-делител , выход дополнительного управл емого триггераThis is achieved by the fact that the phase meter is equipped with an additional controlled trigger, an additional electronic key with an adder, a switch and four matching circuits connected in parallel and parallel to the driver outputs in the device channels, with the outputs of each pair of matching circuits connected to the trigger trigger dividers and control triggers, the second inputs of the coincidence circuits in each channel are interconnected with each other and with the input of the trigger-divider, the output of the additional controlled trigger

Claims

connected to the first input of an additional electronic key, the second input of which is connected to the generator of quantizing pulses, and the output to one of the inputs i yMMHTopa, on the input of which the output of the first electric key is fed, the output of the adder via the second electron; the key is connected to the counter and the time: the master circuit. The drawing shows a block diagram of a digital phase meter. It consists of drivers 1 and 2. Additional driver 3, a divider into two 7 matching schemes, dividers triggers 9 and 1 O, an additional trigger 11, a controlled trigger 12, two electronic keys 13 and 14, an additional electronic key 15, the adder 16, the generator of quantizing pulses 17, the time of the reference circuit 18, the counter. The device works as follows. The formers 1 and 2 generate gentle impulses corresponding to zero-to-plus transitions of input signals. These. impulses through coincidence circuits 5-8 are sent to controlled triggers 11 and 12, which form impulses with a duration, pro-; portioned phase shift between input - signals. The pulses of the phase intervals are applied to the electron 13 and 15, where they are filled with counting pulses, the sequences of counting pulses being shifted by 180 °. The pulses of the pulses are summed up in the accumulator 16 and fed to the counter 19 via the electronic key 14, which is open for a time. measurements of the voltage with the timing of the driver circuit 18. The coincidence circuits 5-8 are controlled-: are the trigger dividers 9 and 1O operating in the controlled trigger mode, which can be set to j the same or opposite ends; neither For this purpose, an additional feed 3 serves to generate pulses corresponding to the transitions of one of the input signals, zero signals from a plus to 1ShUS. And a divider by two 4, from which code the pulses are fed to the installation of trigger-dividers 9 and 10. When pulses are applied to similar shoulders (switch in position I) triggers are set to the same state (large angle measurement mode). At the same time, they: the pulses from the formers 1 and 2. pass on controlled triggers in this order through the matching schemes 5 and 7, then through 6 and 8. When the triggers 9 and 10 are installed in opposite states (switch to position II), the coincidence circuits are opened in the following order: 5 and 8, then 7 and 6, and the start-up pulses go to controlled triggers with an additional 360. Thus, the indications f and the phase shift between the indicator and the measurement are related by the relation: signals (switch in position I) If f -360 ° (switch in position i SII P). The phase shift in the mode of tl is easily determined as ID (B - gsp YuM, which makes it possible to shorten the time by one measurement compared to the prototype. The measurement process in this case is also easily automated. For this, it is necessary at the moment of filling the counter to the number corresponding to 360, reset the counter to zero.Invention A digital phase meter comprising two channels: each of which consists of sequentially connected drivers and trigger dividers, the outputs of which are connected to a common one Alov controlled trigger, as well as an additional shaper and a divider by two at the input of one of the device channels connected in series to the trigger splitter inputs, two electronic keys, one of which is connected to the controlled trigger and the other with a generator of quantizing pulses and a time by the driving circuit, that is, in order to measure phase shifts in the range of 0-360 ° without changing the scale of the conversion phase. When the transition from the measurement mode of large angles to the measurement of small angles near the dead zone, the code is equipped with an additional 1m controlled trigger, an additional electronic key, the sum of a torus, a switch and four coincidence circuits connected in pairs in parallel to the formers of the formers, moreover, the outputs of each pair of coincidence circuits are connected to the inputs of the trigger-dividers and controlled triggers, the second inputs of the coincidence circuits in each channel are interconnected with each other and in one trigger Yield additional controllable trigger connected to the first input of the additional electronic key, the second input of which the floor