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RU2227911C1 - Method for multichannel ultrasonic testing of rails - Google Patents

Method for multichannel ultrasonic testing of rails Download PDF

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Publication number
RU2227911C1
RU2227911C1 RU2002134325/28A RU2002134325A RU2227911C1 RU 2227911 C1 RU2227911 C1 RU 2227911C1 RU 2002134325/28 A RU2002134325/28 A RU 2002134325/28A RU 2002134325 A RU2002134325 A RU 2002134325A RU 2227911 C1 RU2227911 C1 RU 2227911C1
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RU
Russia
Prior art keywords
ultrasonic
rail
signals
echo
signal
Prior art date
Application number
RU2002134325/28A
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Russian (ru)
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RU2002134325A (en
Inventor
А.А. Марков
Д.А. Шпагин
М.Н. Шилов
А.Ю. Веревкин
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ОАО "Радиоавионика"
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Application filed by ОАО "Радиоавионика" filed Critical ОАО "Радиоавионика"
Priority to RU2002134325/28A priority Critical patent/RU2227911C1/en
Application granted granted Critical
Publication of RU2227911C1 publication Critical patent/RU2227911C1/en
Publication of RU2002134325A publication Critical patent/RU2002134325A/en

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

Abstract

FIELD: non-destruction quality control of materials and articles, possibly ultrasonic flaw detection of railway road rails and other elongated products. SUBSTANCE: method comprises steps of selecting reception time window of ultrasonic transducers more than distribution time period of ultrasonic signal from its irradiation point until boundary of rail; evaluating and storing maximum amplitudes of echo-signals; using as time moment of achieving such values time moment of echo-signal reception; displaying results of sounding portion of rail by means of all ultrasonic transducers in the form of B type sweep while taking into account maximum amplitudes of echo-signals and ultrasonic tranducers receiving said signals; using time relation of maximum amplitudes of echo-signals along selected portion of rail and for selected ultrasonic transducer in order to provide accurate identification of non-uniformities of rail. EFFECT: enhanced quality and accuracy of flaw detection due to possibility for detecting by means of reflected ultrasonic signals flaws invisible at direct sounding, highly accurate determination of flaw coordinates, easy-to-use interface with operator, detailed identification of non-uniformities of rail. 8 dwg

Description

Текст описания в факсимильном виде (см. графическую часть).Description text in facsimile form (see graphic part).

Claims (1)

Способ многоканального ультразвукового контроля рельсов, заключающийся в том, что на рельс устанавливают ультразвуковые преобразователи с разными направлениями излучения-приема, совместно перемещают их вдоль рельса, определяют и запоминают текущее положение преобразователей относительно рельса, периодически прозвучивают рельс одновременно всеми ультразвуковыми преобразователями, для чего каждым ультразвуковым преобразователем излучают импульсный ультразвуковой сигнал, обнаруживают эхо-сигналы, для чего ультразвуковыми преобразователями непрерывно во временном окне приема принимают ультразвуковые сигналы и сравнивают их амплитуду с индивидуальным для каждого ультразвукового преобразователя порогом обнаружения, сигналы, превысившие порог обнаружения, считаются эхо-сигналами, измеряют временные интервалы от момента излучения импульсного ультразвукового сигнала до момента приема каждого эхо-сигнала, по измеренным временным интервалам, а также известным углу излучения ультразвукового преобразователя и скорости распространения ультразвуковых сигналов в направлении излучения вычисляют координаты отражателей ультразвуковых сигналов в рельсе относительно текущего положения ультразвукового преобразователя, по результатам прозвучивания текущего участка рельса всеми ультразвуковыми преобразователями формируют, запоминают и отображают схему расположения отражателей на двухмерном изображении сечения текущего участка рельса, которую используют для общей идентификации неоднородностей в рельсе, отличающийся тем, что временное окно приема каждого ультразвукового преобразователя выбирают большим, чем время распространения ультразвукового сигнала от точки излучения до границы рельса в направлении излучения и обратно, при прозвучивании рельса непрерывно сравнивают каждый обнаруженный эхо-сигнал с совокупностью различных уровней, максимальный из уровней, достигнутых эхо-сигналом, считают амплитудой эхо-сигнала, а момент его достижения - моментом приема эхо-сигнала, по результатам прозвучивания текущего участка рельса всеми ультразвуковыми преобразователями запоминают и отображают на схеме расположения отражателей информацию об амплитудах эхо-сигналов и получивших их ультразвуковых преобразователях, для детальной идентификации неоднородностей в рельсе используют временную зависимость амплитуд эхо-сигналов по выбранному участку рельса и ультразвуковому преобразователю.The method of multichannel ultrasonic monitoring of rails, which consists in installing ultrasonic transducers with different directions of radiation-reception on the rail, moving them along the rail together, determining and storing the current position of the transducers relative to the rail, periodically sounding the rail simultaneously with all ultrasonic transducers, for which each ultrasonic a transducer emits a pulsed ultrasonic signal, echo signals are detected, for which ultrasonic conversion the applicants continuously receive ultrasonic signals in the reception time window and compare their amplitude with the detection threshold individual for each ultrasonic transducer, signals that exceed the detection threshold are considered echo signals, measure time intervals from the moment of emission of the pulsed ultrasonic signal to the moment of reception of each echo signal, according to the measured time intervals, as well as the known angle of radiation of the ultrasonic transducer and the propagation velocity of ultrasonic signals in n in the direction of radiation, the coordinates of the reflectors of the ultrasonic signals in the rail relative to the current position of the ultrasonic transducer are calculated, according to the results of sounding the current section of the rail with all ultrasonic transducers, a reflector arrangement is formed on a two-dimensional image of a section of the current section of the rail, which is used for the general identification of inhomogeneities in the rail, which differs the fact that the time window for receiving each ultrasonic transducer is selected longer than the propagation time of the ultrasonic signal from the radiation point to the rail boundary in the radiation direction and vice versa, when the rail is sounded, each detected echo signal is continuously compared with a set of different levels, the maximum of the levels achieved by the echo signal is considered the amplitude of the echo signal, and the moment of its achievement - by the moment of receiving the echo signal, according to the results of sounding the current section of the rail with all ultrasonic transducers, they are stored and displayed on the arrangement of reflectors and formation on the amplitudes of the echo signals received and their ultrasonic transducers for detailed identification of inhomogeneities in the rail is used the time dependence of the amplitudes of the echo signals on the selected portion of the rail and the ultrasonic transducer.
RU2002134325/28A 2002-12-19 2002-12-19 Method for multichannel ultrasonic testing of rails RU2227911C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2002134325/28A RU2227911C1 (en) 2002-12-19 2002-12-19 Method for multichannel ultrasonic testing of rails

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2002134325/28A RU2227911C1 (en) 2002-12-19 2002-12-19 Method for multichannel ultrasonic testing of rails

Publications (2)

Publication Number Publication Date
RU2227911C1 true RU2227911C1 (en) 2004-04-27
RU2002134325A RU2002134325A (en) 2004-07-20

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RU2002134325/28A RU2227911C1 (en) 2002-12-19 2002-12-19 Method for multichannel ultrasonic testing of rails

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2582298C1 (en) * 2015-03-13 2016-04-20 Открытое Акционерное Общество "Российские Железные Дороги" Device for displaying rail flaw detector
RU2692947C2 (en) * 2017-08-11 2019-06-28 Общество с ограниченной ответственностью "Нординкрафт Санкт-Петербург" Installation for automatic ultrasonic monitoring of rails
RU2791145C1 (en) * 2022-12-02 2023-03-03 Акционерное общество "РАДИОАВИОНИКА" Method for ultrasonic testing of the bolted rail joints zone

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2582298C1 (en) * 2015-03-13 2016-04-20 Открытое Акционерное Общество "Российские Железные Дороги" Device for displaying rail flaw detector
RU2692947C2 (en) * 2017-08-11 2019-06-28 Общество с ограниченной ответственностью "Нординкрафт Санкт-Петербург" Installation for automatic ultrasonic monitoring of rails
RU2791145C1 (en) * 2022-12-02 2023-03-03 Акционерное общество "РАДИОАВИОНИКА" Method for ultrasonic testing of the bolted rail joints zone
RU2809185C1 (en) * 2023-05-16 2023-12-07 Акционерное общество "РАДИОАВИОНИКА" Method for multi-channel ultrasonic rail testing
RU2818035C1 (en) * 2023-10-09 2024-04-23 Акционерное общество "РАДИОАВИОНИКА" Method for ultrasonic inspection of local sections of railway rails

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20071220

NF4A Reinstatement of patent

Effective date: 20090127

MM4A The patent is invalid due to non-payment of fees

Effective date: 20101220

NF4A Reinstatement of patent

Effective date: 20120720

MM4A The patent is invalid due to non-payment of fees

Effective date: 20131220

NF4A Reinstatement of patent

Effective date: 20160110