SU729524A1

SU729524A1 - Arrangement for measuring-linear distortion coefficient

Info

Publication number: SU729524A1
Application number: SU782688501A
Authority: SU
Inventors: Марк Яковлевич Минц; Виктор Николаевич Чинков; Валерий Евгеньевич Петров
Original assignee: Харьковское Высшее Военное Командное Училище Им. Маршала Советского Союза Крылова Н.И.
Priority date: 1978-11-27
Filing date: 1978-11-27
Publication date: 1980-04-25

Description

Изобретение относитс к области электрои радиоизмерений.This invention relates to the field of electronic radio measurements.

Известно устройство ид измерени коэффициента нелинейных искажений, основанное на Подавлении основной гармоники в исследуемом сигнале 1. В этом устройстве с помощью заграждающего фильтра в исследуемом сигнале подавл ют напр жение основной гармоники и измер ют действующее значение исследуемого сигнала и высщих гармоник.A device is known that measures the nonlinear distortion coefficient based on the suppression of the main harmonic in the signal under study 1. In this device, the voltage of the main signal and the highest harmonics are measured using a stop-band filter in the signal under study.

В даннсЗм устройстве невысока точность, недостаточный нижний предел измерени и ограниченный частотный диапазон обусловлены использованием фильтров дл подавлени первой гармоники.In this device, the accuracy is low, the insufficient lower limit of measurement and the limited frequency range are due to the use of filters to suppress the first harmonic.

Наиболее близким к изобретению вл етс устройство, которое содержит последовательно соединенные анализатор гармоник дл измерени необходимого числа гармонических составл ющих , по которым вычисл ют коэффициент гармоник, блок делени и вычислитель корн квадратного Это устройство имеет сложную конструкцию, обусловленную необходимостью возведени ;Closest to the invention is a device that contains a serially connected harmonic analyzer for measuring the required number of harmonics, from which the harmonic coefficient is calculated, the dividing unit and the square root calculator. This device has a complex structure due to the necessity of erection;

в квадрат действурощих значений исследуемого сигнала и первой гармо1шки. Эти операции привод т к дoпoлнитeJ7ьнl.lм погрешност м измерени коэффищ1ента нелинейных искажений .in the square of the actual values of the signal under study and the first harmonic. These operations lead to the addition of J7nl.lm measurement error of the nonlinear distortion factor.

Цель изобретени состоит в повышении точности измерений, при малых коэффициентах измерений достигаетс это тем, «гго в устройство дл измерени коэффициента нели10 нейных искажений, содержащее последовательно соединенные измеритель первой гармоники, блок делени и вычислитель корн квадратного дополнительно введены измеритель действующего значени , вход которого соединен The purpose of the invention is to improve the accuracy of measurements, with small measurement coefficients achieved by this, the device for measuring nonlinear distortion coefficient, containing the first harmonic meter connected in series, the dividing unit and the square root calculator, are additionally introduced with the effective value meter, whose input is connected

ts с входом измерител первой гармоники, и блок разности, подключенный своими входами к выходам измерителей первой гармоники и действующего значени , а выходом - к второму блока делени ,ts with the input of the first harmonic meter, and the difference unit, connected by its inputs to the outputs of the first harmonic meters and the effective value, and the output to the second dividing unit,

2020

На чертеже приведена блок-схема устройства .The drawing shows a block diagram of the device.

Claims

The device includes a first harmonic meter 1, a current meter 2, a difference 3 GnoKf, a division block 4 and a square root calculator 5. The input of the device is the inputs of the first harmonic measurement body 1 and the actual value measuring device 2, the outputs of which are connected to two inputs of the difference unit 3. The first harmonic outputs 1 and the difference unit 3 are connected to two inputs of the division unit 4 whose output is connected to the input calculator 5 square root. The output of the latter is the output of the device. The principle of operation of the device is as follows. The signal under study is fed to the inputs from the first harmonic measurer 1 and the measuring instrument 2 of the effective value. The first harmonic meter measures the effective value of the first harmonic of the signal under investigation, and the effective value meter determines the actual value of the signal under study. At the output Y of the block of difference 3, a value is generated which is fed to one input of the division block 4. The other input of this block receives the effective value of the first harmonic V, fc of the output of the meter 1 of the first harmonic 44 NICKY. The quotient from the output of the division unit 4 is supplied to the calculator 5 square root, at the output of which a measurement result is formed. Apparatus of the Invention A device for measuring the nonlinear distortion coefficient comprising a first harmonic meter connected in series, a dividing unit and a square root calculator, which is characterized by the fact that, in order to improve the measurement accuracy, with a small distortion coefficient, an effective value meter has been added to it, the input of which is connected to the input of the first harmonic meter, and the difference unit, the inputs of which are connected to the outputs of the first harmonic meters and the rms value, and the output to watts to the input of the division block. Sources of information taken into account during the examination 1. Kushnir F. V., Savenko V. G. Electroradio measurement. L., Energie, 1975.