SU531092A1

SU531092A1 - Frequency control device

Info

Publication number: SU531092A1
Application number: SU2156524A
Authority: SU
Inventors: Владислав Григорьевич Демидов
Original assignee: Предприятие П/Я В-2969
Priority date: 1975-07-15
Filing date: 1975-07-15
Publication date: 1976-10-05

Description

Изобретение относитс к измерительной технике и предназначено дл контрол частоты гармонического сигнала и индикации вь1хода частоты за допустимые пределы.The invention relates to a measurement technique and is intended to control the frequency of a harmonic signal and indicate that the frequency pass is out of acceptable limits.

Известно устройство дл регулировани контрол частоты импульсов, содержащее релаксационный генератор, врем задающие цепи которого св заны с устройством управлени , выполненным в виде RO-цепи 1A device for regulating the control of the frequency of pulses is known, which contains a relaxation generator, the timing of which driver circuit is associated with a control device made in the form of a RO circuit 1

Недостаток устройства заключаетс в низком быстродействии.The drawback of the device lies in the low speed.

Известно устройство дл контрол частоты , содержащее разр дный ключ, соединенный со входом устройства, релаксационный генератор, к выходу которого последовательно подключены детектор и линейный элемент 2,A device for controlling frequency is known, which contains a bit switch connected to the input of the device, a relaxation generator, to the output of which a detector and a linear element 2 are connected in series,

Недостаток этого устройства - низкое быстр одействие.The disadvantage of this device is a low fast one.

Дл повышени быстродействи устройство , содержащее разр дный ключ, соединенный со входом устройства, релаксационный генератор,к выходу которого последовательно под1шючены детектор и релейный элемент, снабжено последовательноTo increase speed, a device containing a bit switch connected to the input of the device, a relaxation generator, to the output of which the detector and relay element are sequentially connected, are provided with

соединенными вторым релаксационным генератором и вторым детектором, выход которого подключен ко входу релейного элемента, и двум диодами, катоды которых объединены и подключены к выходу разр дного ключа, а аноды диодов соединены с управл ющими входами первого и второго релаксационных генераторов.connected by a second relaxation generator and a second detector, the output of which is connected to the input of the relay element, and two diodes, the cathodes of which are combined and connected to the output of the discharge switch, and the anodes of the diodes connected to the control inputs of the first and second relaxation generators.

На чертеже приведена электрическа схема предлагаемого устройства.The drawing shows the electrical circuit of the proposed device.

Устройство содержит основной генератор 1 релаксационных колебаний, включающий в себ резистор 2, конденсатор 3, динистор 4 и нагрузочный резистор 5. Выход генератора через детектор 6 подключен ко входу релейного элемента 7, выполненного на дифференциальном усилителе 8, нагрузкой которого вл етс реле 9 с контактами 10,The device contains the main generator of relaxation oscillations 1, which includes a resistor 2, a capacitor 3, a dynistor 4 and a load resistor 5. The generator output is connected via a detector 6 to the input of a relay element 7 made on a differential amplifier 8, the load of which is relay 9 with contacts ten,

Claims

The output of the additional relaxation generator 11 through an additional detector 12 is connected to another input of the relay element. The discharge switch 13, formed by the pulse shaper 14 and 35 by the transistor 15, is connected to the relaxation generators via diodes 16 and 17. The circuit parameters are chosen so that the relaxation generator 1 generates a pulse sequence with frequency P which is the upper limit frequency and relaxation generator 11 - s frequency is the lower limit frequency of the controlled frequency range. At the same time, when the relaxation generators work at the loads of the detectors, they are equal. When the input terminals of the device are connected to the source of the monitored signal, the frequency F - - shaper 14 X produces pulses that periodically open the transistor 15 at a frequency equal to, resulting in both capacitors of the relaxation generators 1 and 11 being periodically discharged. If the frequency of the monitored signal F h / lies above the cut-off frequency F, i.e. the relation T T0 is taken. The voltages on the storage capacitors of the generators 1 and 11 do not reach the switching thresholds of the dynisters, and there are no signals at the outputs of the detectors 6 and 12. As a consequence, the relay coil 9 is de-energized, and the contacts 10 of the linear device 7 are open. If the frequency of the monitored signal turns out to be less than the lower cut-off frequency, i.e. The following relation is met on the load resistors of the generators 1 and 11, pulsed signals appear that, after detection, create constant voltages at the inputs of the differential amplifier 8. In this case, the relay coil 9 will also be de-energized, and the contacts 10 are open. If the frequency of the monitored signal lies within the monitored interval, then the pulse signal at the output of the generator 11 will be absent. The voltage at the output of the detector 12 is also absent. At the same time, a pulse signal is generated at the output of the generator 1. Under the action of the signal from the output of the detector 6, the relay 9 is triggered. The closure of contacts 10 indicates that the frequency of the monitored signal lies within the monitored frequency interval. The time of formation of the control command at the output of the amplifier of the relay element does not exceed two periods of the signal being monitored, which ensures high performance of the device. A formula for monitoring a frequency control device containing a discharge key connected to the device input, a relaxation generator, to the output of which a detector and a relay element are connected in series, characterized in that, in order to improve speed, the second is connected in series a relaxation generator and a second detector, the output of which is connected to the input of the relay element, and with two diodes whose cathodes are combined and connected to the output of the discharge switch, and the anodes of the diodes are connected to the control the main inputs of the first and second relaxation generators. Sources of information taken into account in the examination of the application: 1, German Patent No. 1800О58, DECR 3/30 dated 13 / 1О, 1971 2, Avt., Sv. N9 457967, GO5B 1/01 dated 26.01.1975.