SU938139A1

SU938139A1 - Automatic flaw indicator for ultrasonic flaw detector

Info

Publication number: SU938139A1
Application number: SU803211308A
Authority: SU
Inventors: Антон Павлович Коваль; Владимир Геннадиевич Успенский; Станислав Владимирович Веремеенко
Priority date: 1980-12-02
Filing date: 1980-12-02
Publication date: 1982-06-23

Description

Изобретение относитс к неразрушаю щим испытани м ультразвуковым методом и может быть использовано дл ко троп изделий.The invention relates to non-destructive ultrasound testing and can be used for coral products.

Известен автоматический сигнализатор дефектов, содержащей сиюсршизатор, схему И, два селекте м, два триггера и исполнительный механизм tl The automatic defect signaling device is known, which contains a tacroller, an And scheme, two select m, two triggers and an actuator tl

Недостатком известного уст{й йства вл етс низка недостоверность ксжтрол .A disadvantage of the well-known text is the low unreliability of xytrol.

Наиболее близким DO технической cyvjiностй и достигаемому результату вл етс автоматический сигнализатор дефек ц тов к ультразвуковому дефектоскопу, содержащий последовательно соединенные селектор, первый пиковый детектор и второй пиковый детектор, а также формирователь зоны контрол 23 .The closest DO to technical cyvdiability and the achieved result is an automatic defect detector for an ultrasonic flaw detector, containing a series-connected selector, a first peak detector and a second peak detector, and also a driver of the control zone 23.

Недостатком известного сигнализатора вл етс низка помехозащищенность 20 контрол , так как возможно попадание помех в зону стробировани .A disadvantage of the known signaling device is the low noise immunity of the control 20, since it is possible for interference to enter the gating zone.

Цель изобретени - повышение помехозащтценвости контрол .The purpose of the invention is to increase the noise immunity of the control.

Поставленна цель достигаетс тем, что автоматический сигнализатор дефектов снабжен блоком помехозащиты, включенным между селектором и формирователем зоны ксвирол , трем схемами сов-. паден«й, первые входы которых подключены к выходам формировател кав.трол , второй вход первой схемы совпадений соединен с выходом селектора, а выход - с вторым входом- второго пикового детектора, второй вход второй схемы совпадений подключен к выходу второго пикового детектора, и счетчиком, первый вход которого соединен с выходом третьей схемы совпадений,- второй вход - с выходом блока помехозащиты, а выход с вторым входом формировател зс ы контрол .The goal is achieved by the fact that the automatic defect detector is equipped with a noise protection unit, connected between the selector and the xvirol driver, with three schemes together. the first inputs of which are connected to the outputs of the driver cav, the second input of the first coincidence circuit is connected to the output of the selector, and the output is connected to the second input of the second peak detector, the second input of the second coincidence circuit is connected to the output of the second peak detector, and a counter , the first input of which is connected to the output of the third coincidence circuit, - the second input - to the output of the noise protection unit, and the output to the second input of the driver.

На фиг. 1 представлена блок-схема предлагаемого сигнализатора /дефектов; на фиг. 2 - временные диаграммы работе устройства;FIG. 1 shows the block diagram of the proposed alarm / defects; in fig. 2 - time diagrams of the device;

Claims

The automatic defect detector contains a series-connected selector 1, a first peak detector 2, and a second peak detector 3, a shaper 4 of the control zone, a 5 ntv protection unit connected between the selector 1 and a shaper 4 of the control zone (the first coincidence circuit 6, the first input of which is connected to the output of the imaging unit 4 of the control zone, the second asod to the output of the selector 1, and the output to the second input of the second peak detector 3j the second coincidence circuit 7 connected between the second detector 3 and the imaging unit 4 of the control zone, the third Hem 8 matches connected between shaper 4 control zones and counter 9. The second input of counter 9 is connected to the output of block 5 noise protection, and the output is connected to the second input of shaper 4 control zones, to the output of the second circuit 7 coincidence The register 1O is connected, Automatic signaling device defect The ultrasonic flaw detector works as follows: The selector 1 receives an impulse from the output of the flaw detector amplifier (not shown. Not shown. The selector selects the impulse of the defect and feeds it to the first peak detector 2 and the interference suppression block 5). Yes, the first peak detector 2 impulse 11, proportional to the impulse from the defect, is fed to the input of the second peak detector 3. If there is a sequence of n impulses from the defect (where n is the number of impulses for which interference protection occurs) at the output of interference suppression unit 5 pulse 12 and start the shaper 4 control zones, the pulse 13 of which is fed to the second input of the circuit 8 matches, and pulse 14 to the second inputs of the circuits b and 7 matches. At the same time, the pulse 12 of the noise protection unit 5 sets the pulse counter 9 to the initial state. A pulse 16 appears at the inputs of circuit 7 of matching pulses 14 and 15, which is proportional to the pulse from the ceftect, which is fed to the recorder U, the sync pulse from the synchronizer output (not shown) when there is a pulse 13 on the second the input of the coincidence circuit 8 is fed to the input of the pulse counter 9 and through time, where K = 0 ° is the counting factor, T is the period of synchronization pulses, equal to the time of this section of the product. A pulse 17 is applied at the output of 9 pulses, which causes a reset of the imaging unit 4 of the control zone, and the pulses 13 and 14 with their back edges stop the synchronization pulses to the input of the counter 9 of pulses and pulse 16 to the recorder Y. Thus, the output circuit 7 matches in the course of time there is a pulse 16, proportional to the largest amplitude value of the pulse 15 of the cegector 3, which in turn is proportional to the largest amplitude value in the sequence of n defect pulses, hertn is the number of pulses, with interim protection. When a short-term disturbance with a duration less than n T arrives at the control zone, a pulse 18 appears at the output of the coincidence circuit 6, which. resets the accumulated interference information in the second peak detector 3. The proposed device allows the detection of defects with high noise immunity. The expected annual economic effect from the use of the installation is about 10,000 rubles. Claims An automatic defect detector for an ultrasonic flaw detector containing a series-connected selector, a first peak detector and a second peak detector, as well as a control zone driver, characterized in that, in order to increase the noise immunity, it is provided with a noise protection unit connected between the selector. and a driver of the control zone, three coincidence circuits, the first inputs of which are connected to the outputs of the control zone former, the second input of the first coincidence circuit is connected to the output of select1 {ea, and the output to the second input of the second peak detector, and the second input of the second peak matches are connected to the output of the second peak detector, and a counter, the first input of which is connected to the output of the third coincidence circuit, the second input to the output of the noise protection unit, and the output to the second input of the shaper of the xytrol zone. Sources of information taken into account in the examination 1. The author's certificate. USSR № 534686, cl. G 01 N 29 / O4, 1975.

2. Authors certificate of the USSR M 486270. cl. G O1N 29/04, 1974.

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