SU651464A1

SU651464A1 - Radio pulse shaper

Info

Publication number: SU651464A1
Application number: SU772523576A
Authority: SU
Inventors: Николай Михайлович Громогласов; Евгений Иванович Сергеев
Original assignee: Горьковский Филиал Всесоюзного Научно-Исследовательского Института По Нормализации В Машиностроении
Priority date: 1977-09-09
Filing date: 1977-09-09
Publication date: 1979-03-05

Description

Формирователь радиоимпульсов предназначен д.о использовани в радиотехнических устройствах различного назначени , а также в акустических и гидроакустических установках дл исследовани фазовых, частично-фазовых характеристик в твердом теле , в средах с регул рными и случайными неоднородност ми и в дефектоскопии.The radio pulse shaper is designed for use in various types of radio devices, as well as in acoustic and hydroacoustic installations for studying phase, partial phase characteristics in a solid, in media with regular and random inhomogeneities and in defectoscopy.

Известен формирователь радиоимпульсов , предназначенный дл получени радиоимпульсов из синусоидального гармонического сигнала и в виде пр моугольных импульсов, состо щий из генератора стандартных сигналов, генератора пр моугольных импульсов и собственно формировател - 1. Известный формирователь работает в широком интервале частот высокочастотного заполнени и скважности импульсов , но высокочастотные колебани не засинхронизированы частотой следовани импульсов .A radio pulse former designed to receive radio pulses from a sinusoidal harmonic signal and in the form of square pulses, consisting of a generator of standard signals, a square pulse generator, and the driver itself — 1. The known driver has a wide frequency range of high-frequency filling and pulse duty ratio, but high frequency oscillations are not synchronized by the pulse frequency.

Наиболее близким по технической сундности к изобретению вл етс формирователь радиоимпульсов, содержащий генератор стандартных сигналов, один выход которого подключен к первому входу выходного формировател , а другой выход через последовательно включенные усилитель и амплитудный ограничитель соединен со входом пересчетного устройства, и генератор импульсов, выход которого подключен ко второму входу выходного формировател , а вход синхронизации подсоединен к выходу формировател синхроимпульсов 2.The closest in technical knowledge to the invention is a radio pulse shaper, which contains a standard signal generator, one output of which is connected to the first input of the output shaper, and the other output is connected via a series-connected amplifier and amplitude limiter to the input of the scaler, and the pulse generator whose output is connected to the second input of the output driver, and the synchronization input is connected to the output of the clock generator 2.

Недостатком этого формировател вл етс то, что он вырабатывает периодический сигнал в виде радиоимпульса, где начальна фаза высокочастотной составл ю-, щей носит случайный характер относительно действи переднего фронта радиоимпульса .The disadvantage of this former is that it produces a periodic signal in the form of a radio pulse, where the initial phase of the high-frequency component is random in relation to the action of the leading edge of the radio pulse.

Целью изобретени вл етс повыще гиеThe aim of the invention is to increase

стабильности начальной фазы выходного сигнала.stability of the initial phase of the output signal.

Поставленна цель достигаетс тем, что в формирователь радиоимпульсов, содержащий генератор стандартных сигналов, одинThe goal is achieved by the fact that in the shaper of radio pulses containing a standard signal generator, one

Claims

the output of which is connected to the first input of the output driver, and the other output through a series-connected amplifier and amplitude limiter is connected to the input of the counting device, and a pulse generator, the output of which is connected to the second input of the output driver, and the synchronization input is connected to the output of the clock generator, a decoder is input- the switch, the input of which is connected to the output of the counting device, and the reset pulse shaper, the input of which is connected to the output of the decoder-transfer key, and the output is connected to the input of the clock sync pulse. The drawing shows a structural diagram of the proposed shaper radio pulses. The driver contains a generator of 1 standard signals, a generator of 2 pulses, an output driver of 3, an amplifier 4, an amplitude limiter 5, a counting device 6, a decoder-switch 7, a driver of reset pulses 8 and a shaper of 9 clock pulses: The former of radio pulses works as follows. The signal from generator 1 is fed to the input of shaper 3. The duration of the radio pulse generated in shaper 3 is determined by the duration of the video pulse received from generator 2 operating in external trigger mode. From oscillator 1, a sinusoidal signal is simultaneously fed to synchronization amplifier 4, which simultaneously plays the role of a buffer stage to provide an isolation over a reference sinusoidal signal. The amplified signal from the amplifier 4 is fed to a two-way amplitude limiter 5. In the limiter 5, a sinusoidal signal is limited and pulses are generated to ensure the operation of the counting device 6. The frequency of the pulses fed to the device 6 is equal to the frequency-filling frequency. Zaggusk generator 2 is produced through the reset pulse shaper 8 and the shaper 9 clock pulses from the first counting pulse entering the unfilled counter. The imaging unit 9 carries out a predetermined arrangement of the clock pulses relative to the high-frequency oscillator, and allows adjusting the initial phase. Subsequent pulses in synchronization are not involved and are passive count pulses. The time of the passive counting determines the repetition period of the clock pulses, and can be changed with the help of the decryptor switch 7. When the calculator is full, the specified capacity of the passive counting pulse is fed back to the imaging unit 8, which reset the counting device 6 and the imaging device 9 Thus, the scaler 6 is again unfilled and shaper 9 is prepared for | issuing the next clock pulse. Selecting the first pulse for synchronization allows you to maintain the set phase relative to the leading edge with fixed values of the radio pulse parameters (frequency of high frequency filling, duration) and during their scanning. Synchronization of the initial phase of high-frequency filling with the location of the leading edge of radio pulses (radio pulses with a monophasic filling of the high-frequency component) in the radio pulse shaper greatly expands the capabilities of radio engineering and acoustic, measurements when conducting research on the physicochemical properties and diagnostics of structures. Formula of the radio pulse former containing the standard signal generator, one output of which is connected to the first input of the output driver, and the other output is connected through the series-connected amplifier and amplitude limiter to the input of the counting device, and the pulse generator, the output of which is connected to the second input of the output driver, and the synchronization input is connected to the output of the sync pulse generator, characterized in that, in order to increase the stability of the initial phase of the output second signal decoder incorporated therein switch having an input connected to the output scaler and a reset pulse generator having an input connected to the output of the decoder, a switch, and an output connected to the input of sync. Sources of information taken into account during the examination 1. N.Agliulov, N. Kh., Et al. Ultrasonic method for controlling countercurrent melt crystallization, Factory Laboratory, No. 5, 1976, p. 559.

2.Technical report of Gorky State University, № 426, Gorky, 1976..,

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