SU888030A1

SU888030A1 - Ultrasonic flaw detection device

Info

Publication number: SU888030A1
Application number: SU802887059A
Authority: SU
Inventors: Юрий Леонидович Анисимов; Виталий Иванович Бойко
Original assignee: Днепродзержинский Ордена Трудового Красного Знамени Индустриальный Институт Им.М.И.Арсеничева
Priority date: 1980-02-27
Filing date: 1980-02-27
Publication date: 1981-12-07

Description

Изобретение относится к контрольно-измерительной технике и может быть использовано при ультразвуковой дефектоскопии ферромагнитных изделий.The invention relates to a control and measuring technique and can be used for ultrasonic inspection of ferromagnetic products.

Известно устройство для ультразвуковой дефектоскопии, содержащее индукцион- ⁵ный преобразователь и дефектоскоп, электрически связанные между собой [1].A device for ultrasonic flaw detection is known, which contains an induction ⁵ transducer and a flaw detector that are electrically connected to each other [1].

Недостатком данного устройства является низкая точность измерений, обусловленная слабой помехозащищенностью.The disadvantage of this device is the low measurement accuracy due to poor noise immunity.

Целью изобретения является повышение точности измерения и помехоустойчивости.The aim of the invention is to improve the accuracy of measurement and noise immunity.

Эта цель достигается тем, что устройство для ультразвуковой дефектоскопии снабжено блоком задержки, вход которого связан с выходом дефектоскопа, ультразвуко- 15 вым преобразователем, связанным с дефектоскопом, связанным с индукционным преобразователем блоком обработки сигнала помехи, релейным элементом, вход которого связан с выходом блока обработки сигнала помехи и нормально открытым клю- ²⁰чом, один вход которого связан с выходом блока задержки, а второй вход — с выходом релейного элемента.This goal is achieved by the fact that the device for ultrasonic flaw detection is equipped with a delay unit, the input of which is connected to the output of the flaw detector, an ultrasonic transducer connected to the flaw detector, connected to the induction transducer by an interference signal processing unit, a relay element, the input of which is connected to the output of the processing unit signal interference and normally open chom License keys ^20, one input of which is connected with the output of the delay unit and the second input - to the output relay element.

На чертеже приведена блок-схема устройства для ультразвуковой дефектоскопии.The drawing shows a block diagram of a device for ultrasonic inspection.

Оно содержит ультразвуковой преобразователь 1, связанный с ним дефектоскоп 2, блок 3 задержки, вход которого связан с выходом дефектоскопа 2, нормально открытый ключ 4, один вход которого связан с выходом блока 3 задержки, блок 5 обработки сигнала помехи, связанный с ним индукционный преобразователь 6, и релейный элемент 7, вход которого связан с выходом блока 5 обработки сигнала помехи, а выход со вторым входом нормально открытого ключа 4.It contains an ultrasonic transducer 1, an associated flaw detector 2, a delay unit 3, the input of which is connected to the output of the flaw detector 2, a normally open key 4, one input of which is connected to the output of the delay unit 3, an interference signal processing unit 5, and an induction transducer associated with it 6, and a relay element 7, the input of which is connected to the output of the interference signal processing unit 5, and the output with the second input of the normally open key 4.

Устройство работает следующим образом.The device operates as follows.

Ультразвуковой преобразователь 1 располагают на изделии 8 с обеспечением акустического контакта с ним и возбуждают в изделии 8 ультразвуковые колебания. Ультразвуковой преобразователь 1 принимает отраженные ультразвуковые сигналы, несущие информацию о качестве изделия 8. В дальнейшем эти сигналы поступают на последовательно соединенные дефектоскоп 2, блок 3 задержки и нормально открытый ключ 4.The ultrasonic transducer 1 is placed on the product 8 with the provision of acoustic contact with it and excite ultrasonic vibrations in the product 8. Ultrasonic transducer 1 receives reflected ultrasonic signals that carry information about the quality of the product 8. In the future, these signals are fed to the flaw detector 2, delay unit 3 and a normally open key 4 connected in series.

Нормально открытый ключ 4 управляется сигналом индукционного преобразователя 6 после его усиления в детектировании и в блоке 5 обработки сигнала помехи.The normally open switch 4 is controlled by the signal of the induction converter 6 after it is amplified in the detection and in the interference signal processing unit 5.

Релейный элемент 7 имеет характеристику релейного элемента с задержкой на _fотпускание, т. е. сигнал на выходе этого элемента появляется с началом действий механической ударной нагрузки и оканчивается после затухания помехи спустя время, несколько большее времени задержки блока 3.The relay element 7 has the characteristic of a relay element with a delay of _f releasing, i.e., the signal at the output of this element appears with the onset of mechanical shock loading and ends after the interference attenuation after a time slightly longer than the delay time of block 3.

Использование ЭДС индукционного преобразователя 6 для отстройки от влияния упругих деформаций и ударов при поточной дефектоскопии ферромагнитных изделий упрощает устройство контроля и схему обработки информации.The use of the EMF of the induction converter 6 for detuning from the influence of elastic deformations and shocks during in-line flaw detection of ferromagnetic products simplifies the control device and the information processing circuit.

Claims

(54) DEVICE FOR ULTRASONIC DEFECTIC SCIENCE The invention relates to measuring and control technology and can be used for ultrasonic inspection of ferromagnetic products. A device for ultrasonic flaw detection, which contains an induction transducer and a flaw detector, is electrically interconnected. A disadvantage of this device is the low measurement accuracy due to the low noise immunity. The aim of the invention is to improve measurement accuracy and noise immunity. This goal is achieved by providing a device for ultrasonic flaw detection with a delay unit, the input of which is connected to the output of the defectoscope, an ultrasonic transducer connected to the defectoscope, connected to an induction converter by an interference signal processing unit, a relay element whose input is connected to the output an interference signal processing unit and a normally open key, one input of which is connected to the output of the delay unit, and the second input to the output of the relay element. The drawing shows a block diagram of a device for ultrasonic flaw detection. It contains an ultrasonic transducer 1, an associated flaw detector 2, a delay unit 3, the input of which is connected to the output of flaw detector 2, a normally open key 4, one input of which is connected to the output of the delay unit 3, an interference signal processing unit 5 connected there is an induction converter 6 therewith, and a relay element 7, the input of which is connected with the output of the interference signal processing unit 5, and the output with the second input of the normally open key 4. The device works as follows. The ultrasonic transducer 1 is placed on the product 8 with ensuring acoustic contact with it and excites in the product 8 ultrasonic vibrations. Ultrasonic transducer 1 receives reflected ultrasonic signals that carry information about the quality of the product 8. Further, these signals are sent to the series-connected defectoscope 2, delay unit 3 and normally open key 4. Normally open key 4 is controlled by the signal of the induction transducer 6 after its amplification in detection and in block 5 signal processing interference. Relay element 7 has the characteristic of a relay element with a release delay, i.e. a signal at the output of this element appears with the start of action of a mechanical shock load and ends after the interference decays after a time slightly longer than the delay time of block 3. Using an emf of an induction converter 6 for detuning from the influence of elastic deformations and shocks during flow testing of ferromagnetic products, the control device and the information processing circuit simplify. Apparatus of the invention for ultrasonic flaw detection, comprising an induction transducer and a flaw detector, electrically coupled to each other, characterized in that, in order to improve measurement accuracy and noise immunity, it is provided with a delay unit, the input of which is connected to the flaw detector output a flaw detector associated with an induction transducer by an interference signal processing unit, a relay element whose input is connected to the output of the interference signal processing unit and A normally public key, one input of which is connected with the output of the delay unit, and the second input with the output of the relay element. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2643763, cl. G 01 N 27/86, 1978 (prototype).