SU968729A2

SU968729A2 - Multichannel flaw detector

Info

Publication number: SU968729A2
Application number: SU802995010A
Authority: SU
Inventors: Александр Петрович Алексеев; Андрей Андреевич Кривопущенко
Original assignee: Куйбышевский электротехнический институт связи
Priority date: 1980-10-17
Filing date: 1980-10-17
Publication date: 1982-10-23

Description

(З) МНОГОКАНАЛЬНЫЙ ДЕФЕКТОСКОП(3) MULTICHANNEL DEFECTOSCOPE

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Изобретение относитс к неразрушающему контролю и может быть использовано дл дефектоскопии электропровод щих объектов.The invention relates to non-destructive testing and can be used for the inspection of electrically conductive objects.

По основному авт. св. № 83035 известен многоканальный дефектоскоп, содержащий VI автогенераторов и yi вихретоковых преобразователей, включенных в колебательные контуры автогенераторов , последовательно соединенные между собой тактовый генератор, блок задержки и блок обработки сигнал г , распределитель, со.единенный своим входом с тактовым генератором,И локов управлени , включенных между распределителем и управл ющим входом соответствующего автогенератора, формировател , входы которых соединены с выходами автогенераторов, и схему ИЛИ, включенную между выходами формирователей и блоком обработки информации ЛAccording to the main author. St. No. 83035 is known for a multichannel flaw detector containing VI autogenerators and yi eddy current transducers included in oscillatory circuits of autogenerators connected in series with a clock generator, a delay unit and a signal processing unit g, a distributor connected to its input with a clock generator, connected between the distributor and the control input of the corresponding autogenerator, the driver, the inputs of which are connected to the outputs of the autogenerators, and the OR circuit connected between you shaper moves and information processing block

Недостаток известного дефектоскопа заключаетс в недостаточной надежности контрол , что св зано с возможностью работы дефектоскопа с неисправными вихретоковыми преобразовател ми и сложностью вы влени последних.A disadvantage of the known flaw detector is the lack of reliable monitoring, which is associated with the ability of the flaw detector to operate with faulty eddy current transducers and the difficulty of detecting the latter.

Цель изобретени - повышение надежности контрол .The purpose of the invention is to increase the reliability of the control.

Эта цель достигаетс тем, что многоканальный дефектоскоп снабжен амплитудным детектором, соединенным своим входом с выходом схемы ИЛИ, п элементами задержки, п схемами И, соединенными своими первыми входами с выходом амплитудного детектора и своими вторыми входами через соответствуJ5 ющие элементы задержки - с соответствующими выходами распределител ,.и блоком регистрации неисправностей, выполненными в виде последовательно соединенных п триггеров, подключенных 20 своими входами к выходам соответствующих схем И, и индикаторов.This goal is achieved by the fact that a multichannel flaw detector is equipped with an amplitude detector connected by its input to an output of an OR circuit, n delay elements, n circuits AND connected by its first inputs to an output of an amplitude detector and its second inputs through corresponding delays , .and a unit for registering faults, made in the form of serially connected n flip-flops, connected by 20 own inputs to the outputs of the corresponding I circuits and indicators.

Claims

The drawing shows a structural diagram of the flaw detector. The multichannel flaw detector consists of P eddy current transducers 1, included in the oscillatory circuits of the respective n autogenerators 2, connected by their control inputs through the corresponding control units 3 with the corresponding outputs of the distributor, connected to the clock generator 5, sequentially connected circuits 6 OR, connected via the drivers 7 with their inputs to the outputs of the corresponding autogenerators 2, and the signal processing unit 8 connected via the delay unit 9 with clock Operator 5, p delay elements 10, p circuits 11 AND connected by their first inputs to the output of an amplitude detector 12 connected by their input to the output of circuit 6 OR, and connected by their second inputs through delay elements 10 to the corresponding outputs of the distributor k, a fault recorder consisting of n serially connected flip-flops 13, connected by their inputs to the outputs of the corresponding circuits 11 and indicators I. The multichannel flaw detector works as follows. The distributor controlled by the clock th generator, 5) alternately supplies enable signals to the control section 3, including the respective oscillators

2. The frequency of the autogenerators 2 depends on the properties of the material interacting with the corresponding eddy current transducers 1. Formers 7 convert the signals of the autogenerators 2 and through the circuit 6 OR feed them to the inputs of the signal processing unit 8 and the amplitude detector 12. The signal processing unit 8 permissive pulses, arriving through the delay block 9 from the clock generator 5. register signals corresponding to the properties of the object being monitored. If any of the eddy current transducers 1 fails at the output of the corresponding circuit 11, the logical zero signal appears, overlaps the corresponding trigger 13 and triggers the corresponding indicator 1, according to which the failed eddy current transducer 1 is determined. At the same time, the time delay for analyzing signals using delay elements 10 eliminates the effect of transients. The proposed flaw detector improves the reliability of the control, as it allows the rapid detection of faulty eddy current transducers and thereby reduces the likelihood of underframing. Claims of the invention Multichannel flaw detector according to the author. St. No. 83035, characterized in that, in order to increase the reliability of the monitoring, it is equipped with an amplitude detector connected by its input to the output of the OR circuit, n delay elements, n circuits And, connected by its first inputs to the output of the amplitude detector and its second inputs through the corresponding delay elements - with the corresponding outputs of the distributor, and the block of registration of faults, made in the form of serially connected n flip-flops, connected by their inputs to the outputs of the corresponding circuits And, and the indicator ov Sources of information taken into account in the examination 1. USSR author's certificate (R 83035, cl. G 01 N 27/90, 1979 (prototype).,,