SU788049A1

SU788049A1 - Impedance method of testing materials and articles

Info

Publication number: SU788049A1
Application number: SU792716068A
Authority: SU
Inventors: Тимофей Иванович Шеломенцев; Владимир Алексеевич Константинов; Николай Николаевич Гурьев; Николай Измаилович Листопад
Original assignee: Предприятие П/Я А-3327
Priority date: 1979-01-22
Filing date: 1979-01-22
Publication date: 1980-12-15

Description

1one

Изобретение относитс к электроизмерительной технике и может быть использовано при создании устройств дл контрол качества многослойных материалов и изделий.The invention relates to electrical measuring technology and can be used to create devices for quality control of multilayer materials and products.

Известен импедансный способ контрол материалов и изделий, основанный ла возбуждении в отдельных точках объекта контрол механических колебаний и измерении амплитуды и фазы этих колебаний 1.The impedance method of controlling materials and products is known, which is based on the excitation of mechanical vibrations at certain points of the object and the measurement of the amplitude and phase of these vibrations 1.

Недостатки способа - низка достоверность контрол и мала производительность .The disadvantages of the method are low reliability of the control and low productivity.

Наиболее близким по технической сущности к предложенному вл етс способ, вк.пючающий возбуждение в контролируемом объекте механических колебаний, измерение амплитуды и фазы колебаний поверхности контролируемого объекта и сравнение их с амплитудой и фазой колебаний в опорной точке 2.The closest in technical essence to the proposed is a method that includes excitation in a controlled object of mechanical vibrations, measurement of the amplitude and phase of the oscillations of the surface of the controlled object and comparing them with the amplitude and phase of the oscillations at the reference point 2.

Недостаток способа - низка - достоверность контрол .The disadvantage of the method is low - the reliability of the control.

Целью изобретени вл етс повышение достоверности контрол .The aim of the invention is to increase the reliability of the control.

Цель достигаетс тем, что в импедансном способе контрол материалов и изделий, включающем возбуждениеThe goal is achieved by the fact that in the impedance method of controlling materials and products, including the excitation

в контролируемом объекте механических колебаний, измерение амплитуды и фазы колебаний поверхности контролируемого объекта и сравнение их с амплитудой и фазой колебаний в опорной точке, контролируемый объект облучают потоком сверхвысокочастртной электромагнитной энергии, принимают отраженньлй высокочастотный сигнал, вЬвдел ютin a controlled object of mechanical oscillations, measuring the amplitude and phase of oscillations of the surface of a controlled object and comparing them with the amplitude and phase of oscillations at the reference point, the object being monitored is irradiated with a stream of ultrahigh-frequency electromagnetic energy, receiving a reflected high-frequency signal,

10 составл ющую сверхвысокочастотного сигнала, промодулированную колебани ми поверхности контролируемого объекта , измер ют спектрально-временные характеристики этой составл ющей, по10, the component of the microwave signal, modulated by the oscillations of the surface of the object being monitored, is measured by the spectral and temporal characteristics of this component,

15 которым определ ют амплитуду и фазу колебаний контролируемого объекта.15 which determine the amplitude and phase of oscillations of the object being monitored.

Способ осуществл етс следующим образом,The method is carried out as follows.

20 Йсли поверхность облучать СВЧ-сигналом , то колебани iповерхности влекут за собой модул цию отраженного радиолокационногй сигнала. При этом в точку приема приходит фазомоду25 лированный юигнал, несущий в себе информацию об имплитуде и. фазе колёбаний каждой точки поверхности исследуемого объекта.If the surface is irradiated with a microwave signal, then the oscillations of the surface entail the modulation of the reflected radar signal. In this case, the phase modulated signal arrives at the receiving point, carrying information about the impeditude and. the phase of the vibrations of each point of the surface of the object under study.

Claims

The drawing shows a block diagram of the device. It contains a pathogen 1 of mechanical oscillations, a meter 2 of amplitudes and phases of mechanical oscillations including a generator 3 in excess of high-frequency oscillations, a receiver 4 of a microwave signal, a unit 5 for processing a reflected radar signal, an indicator 6 and a controlled object 7.. The device works as follows. The exciter i of mechanical oscillations excites in the studied volume 7 mechanical oscillations. Generator 3 of microwave oscillations generates a signal that irradiates the studied oscillation. the existing object. The emitted signal is modulated by the oscillations of the surface of the object under study, and is reflected and measured by the microwave electromagnetic energy receiver 4. From the receiver, the signal then goes to the device for processing the reflected signal, where the selection of the modulating component occurs and comparing it with some fluctuations, taken as the reference. Then, the signal arrives at indicator 6, and the amplitude change during amplitude or phase during phase variation of the object's surface oscillations relative to some reference oscillations is recorded. The quality of the investigated object is estimated by the maximum indicator reading. To improve the performance of the control, the microwave energy beam scans according to a certain law along all points of the surface of the object being monitored. The invention impedance method of controlling materials and products, including the excitation of mechanical oscillations in the object being controlled, measuring the amplitude and phase of the oscillations of the surface of the object being monitored and comparing them with the amplitude and phase of the oscillations at the reference point, characterized in that irradiated with a stream of microwave electromagnetic energy, receive a reflected microwave signal, extract the component of the microwave signal a, modulated by the vibrations of the surface of the monitored object, measure the spectral and temporal characteristics of this component, which determine the amplitude and phase of the oscillations of the surface of the monitored object. Sources of information taken into account in the examination 1. Yu. V. Lange. Control of adhesive and paired joints in multilayer structures by acoustic impedance method. M., ONTI, 1971.

2.Brul and Kreer, Nerum. Dani. Catalog, M, 1976, in / about Mashpriborintorg, Model 8000 (prototype).