SU437010A1 - Ultrasonic way to control the quality of layered materials and products - Google Patents

Ultrasonic way to control the quality of layered materials and products

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Publication number
SU437010A1
SU437010A1 SU1644246A SU1644246A SU437010A1 SU 437010 A1 SU437010 A1 SU 437010A1 SU 1644246 A SU1644246 A SU 1644246A SU 1644246 A SU1644246 A SU 1644246A SU 437010 A1 SU437010 A1 SU 437010A1
Authority
SU
USSR - Soviet Union
Prior art keywords
quality
products
control
layered materials
ultrasonic
Prior art date
Application number
SU1644246A
Other languages
Russian (ru)
Inventor
Юлий Викторович Ланге
Виктор Васильевич Мурашов
Original Assignee
Предприятие П/Я Р-6209
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Предприятие П/Я Р-6209 filed Critical Предприятие П/Я Р-6209
Priority to SU1644246A priority Critical patent/SU437010A1/en
Application granted granted Critical
Publication of SU437010A1 publication Critical patent/SU437010A1/en

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  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Description

1one

Изобретение относитс  к ультразвуковой дефектоскопии.This invention relates to ultrasonic flaw detection.

Известен способ контрол  качества слоистых материалов и изделий, заключающийс  в возбуждении в изделии с одной из его сторон ультразвуковых колебаний посредством преобразовател , имеющего сухой точечный акустический контакт с поверхностью издели , и приеме с другой стороны издели  прошедщих через него колебаний аналогичным преобразователем.A known method of controlling the quality of laminated materials and products consists in exciting ultrasound vibrations in a product on one of its sides by means of a transducer having dry acoustical point contact with the surface of the product and receiving oscillations passing through it on the other side with a similar converter.

Предложенный способ от известного отличаетс  тем, что излучение производ т импульсно , измер ют врем  распространени  прин того импульса ультразвуковых колебаний и по его увеличению суд т о наличии дефекта в контролируемой зоне. Такой способ повыщает точность контрол .The proposed method differs from the known one in that the radiation is pulsed, the propagation time of the received ultrasonic oscillation pulse is measured and, according to its increase, a defect is detected in the controlled area. This method improves control accuracy.

Излучающий и приемный преобразователи ультразвуковых колебаний располагаютс  соосно по разные стороны контролируемого издели . В бездефектной зоне энерги  ультразвуковых колебаний передаетс  от излучающего преобразовател  к приемному в виде продольной волны, а в дефектной зоне в виде антисимметричной волны нулевого пор дка. Признаком дефекта  вл етс  изменение времени прохождени  импульса от излучающего преобразовател  к приемному. Врем  прохождени  волны при наличии дефекта больще , чем врем  распространени  продольной волны, так как волна проходит, огиба  дефект , больщее рассто ние и с меньшей скоростью , чем продольна  волна.Radiating and receiving transducers of ultrasonic vibrations are located coaxially on opposite sides of the monitored product. In the defect-free zone, the energy of the ultrasonic vibrations is transmitted from the radiating transducer to the receiver in the form of a longitudinal wave, and in the defect zone in the form of an antisymmetric zero-order wave. A symptom of a defect is a change in the transit time of the pulse from the radiating converter to the receiving one. The time of passage of a wave in the presence of a defect is longer than the time of propagation of a longitudinal wave, since the wave passes, deflecting the defect, a greater distance and slower speed than the longitudinal wave.

Применение импульсного излучени  позвол ет производить отсчет времени прохождени  импульса по его переднему фронту. Упруга  волна, определ юща  передний фронт прин того сигнала, проходит от излучател The use of pulsed radiation makes it possible to count the time of passage of a pulse along its leading edge. An elastic wave, determining the leading front of the received signal, passes from the radiator

до приемника кратчайщим путем. Помехи интерференционного характера, св занные с отражением от краев и переходных сечений издели , не оказывают вли ние на передний фронт прин того сигнала. При импульсномto the receiver in the shortest way. Interference interference due to reflection from edges and transition sections of the product does not affect the leading edge of the received signal. With pulsed

излучении к началу очередного импульса упругие волны, возбужденные в изделии предшествующими импульсами, успевают практически полностью затухнуть.By the beginning of the next pulse, the elastic waves excited in the product by the preceding pulses have time to almost completely fade out.

2020

Предмет изобретени Subject invention

Ультразвуковой способ контрол  качества слоистых материалов и изделий, заключающийс  в возбуждении в изделии с одной изThe ultrasonic method of controlling the quality of laminated materials and products, consisting in the excitation of the product with one of

его сторон ультразвуковых колебаний посредством преобразовател , имеющего сухой точечный акустический контакт с поверхностью издели , и приеме с другой стороны издели  прощедщих через него колебанийits sides of ultrasonic vibrations by means of a transducer, having a dry point acoustic contact with the surface of the product, and receiving from the other side of the product oscillations that pave you through it

аналогичным преобразователем, отличаю3 Щийс  тем, что, с целью повышени  точности контрол , излучение производ т импульсно , измер ют врем  распространени  прин 4 того импульса ультразвуковых колебаний и по его увеличению суд т о наличии дефекта в контролируемой зоне.A similar transducer, distinguished by the fact that, in order to increase the control accuracy, the radiation is pulsed, the propagation time of the received 4 pulses of ultrasonic vibrations is measured and its increase is judged on the presence of a defect in the controlled area.

SU1644246A 1971-04-19 1971-04-19 Ultrasonic way to control the quality of layered materials and products SU437010A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1644246A SU437010A1 (en) 1971-04-19 1971-04-19 Ultrasonic way to control the quality of layered materials and products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1644246A SU437010A1 (en) 1971-04-19 1971-04-19 Ultrasonic way to control the quality of layered materials and products

Publications (1)

Publication Number Publication Date
SU437010A1 true SU437010A1 (en) 1974-07-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU1644246A SU437010A1 (en) 1971-04-19 1971-04-19 Ultrasonic way to control the quality of layered materials and products

Country Status (1)

Country Link
SU (1) SU437010A1 (en)

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