SU864103A1

SU864103A1 - Magnetic-tape testing device

Info

Publication number: SU864103A1
Application number: SU792755320A
Authority: SU
Inventors: Николай Михайлович Егорычев; Мухамед Хамидуллович Хусанов
Original assignee: Всесоюзный научно-исследовательский институт по строительству магистральных трубопроводов
Priority date: 1979-04-17
Filing date: 1979-04-17
Publication date: 1981-09-15

Description

Поставленна цель достигаетс тем что узел поперечно-построчного считывани выполнен в виде по меньшей мере двух рычагов и закрепленных на их концах магниточувствительных преобразователей , один рычаг выполнен откидным и Предназначен дл преобразовани , считывающего диаграмму намагниченности магнитной ленты, второ рычаг установлен с возможностью ма тникового качани в плоскости магнитной ленты, узел записи на электрохимическую бумагу выполнен в виде по меньшей мере трех рьочагов, установленных с возможностью йа тникового качани в плоскости электрохимической бумаги, и записывающих электродов , закрепленных на их концах г при этом второй рычаг узла считывани и два прилежащих к нему рычага узла записи соединены посредством шарнирных осей траверсой, а третий электрод предназначен дл записи диаграммы намагниченности магнитной ленты .The goal is achieved by the fact that the node of the cross-line reading is made in the form of at least two levers and magnetically sensitive transducers fixed at their ends, one lever is made folding and is designed to convert reading the magnetization diagram of the magnetic tape, the second lever is installed with the possibility of swinging the plane of the magnetic tape, the electrochemical paper recording unit is made in the form of at least three ryochag set in the plane of electrochemical paper and recording electrodes fixed at their ends g while second arm assembly read and its adjacent two records arm assembly connected by pivot axes traverse and the third electrode is used for recording chart tape magnetization.

На фиг. 1 показана функциональна схема предлагаемого устройстваj на фиг. 2 - его кинематическа схема.FIG. 1 shows a functional diagram of the proposed device j in FIG. 2 - its kinematic scheme.

Устройство содержит узел поперечно-построчного считывани магнитограммы с магнитной ленты 1, выполненный в виде по меньшей мере двух рычагов 2 и 3,,и закрепленных на их концах магниточувствительных преобразователей 4 и 5. Рычаг 3 выполнен откидным и предназначен дл преобразовател 4, например микроферрозонда, считывающего диаграм1-1у намагниченности магнитной ленты 1. Узел записи на электрохимическую бумагу 6 выполнен в виде трех рычагов 7,8 и 9 и записывающих электродов 10, 11 и 12, закрепленных на их концах. Рычаги 2,7, 8 и 9 установлены с возможностью ма тникового качани в плоскости магнитной ленты 1 и электрической бумаги 6 соответственно. Узел синхронизации считывани и записи выполнен из двух пар 13 и 14 соосных роликов с приводом 15, при этом рычаг 2 узла считывани и два прилежащих к нему рычага 7 и 8 узла записи соединены посредством шарнирных осей (позиции не указаны) траверсой 16,The device contains a transverse-line reading unit of a magnetogram from magnetic tape 1, made in the form of at least two levers 2 and 3, and magnetically sensitive transducers 4 and 5 fixed at their ends. The lever 3 is made folding and is intended for a transducer 4, for example a micro ferro probe, reading diagram1-1u of magnetization of magnetic tape 1. The recording unit on electrochemical paper 6 is made in the form of three levers 7.8 and 9 and recording electrodes 10, 11 and 12 fixed on their ends. Levers 2.7, 8, and 9 are installed with the possibility of an oscillation swing in the plane of magnetic tape 1 and electric paper 6, respectively. The read and write synchronization unit is made of two pairs 13 and 14 of coaxial rollers with a drive 15, while the lever 2 of the read unit and two adjacent levers 7 and 8 of the recording unit are connected by means of hinge axes (positions not indicated) using a cross beam 16,

Электрод 12, размещенный на рычаге 9, ш еющем привод 17 ма тникового качани , например измерительный механизм самописца, предназначен дл записи диаграммы 18 намагниченности магнитной ленты 1, дл непрерывного контрол за оптимальный режимом магнитной записи контролируемо1 о издели .Electrode 12 placed on lever 9, stitching the swing oscillator 17, for example, the measuring mechanism of the recorder, is designed to record the magnetization chart 18 of the magnetic tape 1, for continuous monitoring of the optimum magnetic recording mode controlled by the product.

Электронный анализатор выполнен в виде последовательно соединенных полосового фильсра 19 и детектора 20 соединенного со входом усилител 21 выход которого соединен с записываю (щим электродом 10 и блоком 22 сравнени , второй вход которого соединен с генератором 23 тактовых импульсов, а выход блока 22 сравнени соединен со входом формировател 24 парных пр моугольных импульсов, выход которого через оконечный усилитель 25 подсоединен к записывающему электроду 11. Преобразователь 4 подключен ко входу полосового фильтра 26, выхо которого соединен с детектором 27, подключенным ко входу усилител 28 посто нного тока. К выходу усилител 28 подключен привод 17 измерительный механизм самописца , с которым св зан рычаг 9, несущий записывающий электрод 12. Природ 29 ма тникового качани .рычагов 7, 8 и 2, выполненный , например, в виде измерительного механизма самописца, подсоединен к генератору 30 пилообразного напр жени .The electronic analyzer is made in the form of serially connected bandpass filter 19 and detector 20 connected to the input of the amplifier 21, the output of which is connected to the recording electrode (the common electrode 10 and the comparison unit 22, the second input of which is connected to the clock generator 23, and the output of the comparison unit 22 is connected to the input shaper 24 pair of rectangular pulses, the output of which through the terminal amplifier 25 is connected to the recording electrode 11. The converter 4 is connected to the input of the band-pass filter 26, the output of which is connected to a detector 27 connected to the input of the amplifier 28; a drive 17 is connected to the output of the amplifier 28 by a measuring mechanism of the recorder, to which the lever 9 carrying the recording electrode 12 is connected. Levers 7, 8 and 2, made for example, in the form of a recorder measuring mechanism, connected to a sawtooth voltage generator 30.

Устройство работает следующим образом .The device works as follows.

Концы магнитной ленты 1 и бумаги 6 заправл ют в лентопрот жный Mgxaнизм между парами 13 и 14 роликов соответственно и включают приводы 15 и 29. При этом рычаги 7, 8 и 2, несущие на своих концах магниточувствительный преобразователь 5 и записыващие электроды 10 и 11 (соответственно ) , начинают синхронно качатьс поперек прот гиваемых с одинаковой скоростью магнитной ленты и электрохимической бумаги 6, осуществл соответственно поперечно-построчное воспроизведение магнитограммы и многоплановую (многодорожечную) регистрацию сигналов воспроизведени . В цел х экономии электрохимической бумаги и удобства анализа регистрограммы кольцевого сварного шва трубопровода 0 1420 мм, у которого периметр составл ет около 4,5 м, скорость прот жки бумаги может быть уменьшена в определенном масштабе (например 1:2, 1:4 и т.п.).The ends of magnetic tape 1 and paper 6 are filled into tape MgShanism between pairs 13 and 14 of the rollers, respectively, and include drives 15 and 29. At the same time, levers 7, 8 and 2, carrying at their ends a magnetically sensitive transducer 5 and recording electrodes 10 and 11 ( respectively), they begin to synchronously swing across the magnetic tape and electrochemical paper 6 pulled at the same speed, carrying out, respectively, the transverse-line reproduction of the magnetogram and the multidimensional (multi-track) recording of the playback signals Eden. In order to save electrochemical paper and the convenience of analyzing the register pattern of the annular weld of the 1420 mm pipeline, whose perimeter is about 4.5 m, the speed of paper drawing can be reduced at a certain scale (for example, 1: 2, 1: 4 and t .P.).

Claims

With the start of the reproduction of the magnetogram, the signals from the magnetically sensitive transducer 5 pass through a band-pass filter 19 tuned to the second microcurrent excitation current (for example, 465 kHz piezo-ceramic filter from the receiving device), the detector 20 and the linear amplifier 21 are fed to the recording electrode 10 designed for registration on one of the tracks 31 of the paper tape of a television image of magnetic fingerprints of the weld in plan. Simultaneously, the playback signals from the amplifier output go to one of the inputs of the comparator unit 22, to the second input of which a sawtooth or step voltage is supplied from the generator 23 clock pulses. As a result of the addition of two voltages (of different polarity), when each line of the magnetogram is read, a comparison cell is triggered (for example, a trigger) at a certain level of the Signal and in the shaper 24 pairs of short rectangular pulses are produced (by the front and rear rectangular Cell Pulse comparisons), the intervals between which are determined by the duration (width) of the reproduced signal at a given level compared with. After the amplifier 25, these paired pulses are fed to the recording electrode 11, which is intended to record a signal in an analog form of ito points on a separate paper track 32. The signal from the magnetosensitive transducer 4, passing through a band-pass filter 26 (for example, similar to filter 19) j detector 27 and linear amplifier 28 of direct current, is supplied to the drive 17 (for example, the measuring mechanism from a multichannel recorder). In this case, the lever 9 connected to the actuator with the recording electrode 12 is deflected at a certain angle depending on the amplitude of the signal coming from the converter 4 and registers the 18 ns1 magnetization diagram of the weld 1 on the corresponding paper b of the paper b. The amplitude of this register is preliminarily calibrated against a standard. Thus, the proposed device improves the reliability and objectivity of the control with a relatively high reliability of its elements. Apparatus of the Invention Magnetic Diffraction Detection Device, comprising a transverse-line magnetogram reading unit from a magnetic tape and an electrochemical paper recording unit with recording electrodes, interconnected through a synchronization unit and an electronic analyzer, in order to increase the operational reliability of the device and quality control, the transverse-line sensing unit is made in the form of at least two levers and magnetically sensitive components mounted on their ends For example, one lever is made folding and is designed for a transducer that reads the magnetization diagram of the magnetic tape, the second lever is mounted with the possibility of a swing in the plane of the magnetic tape, the recording unit on the electrochemical paper is made in the form of at least three levers the electrochemical paper plane and the recording electrodes attached to their ends, the second lever of the readout assembly and two levers of the recording assembly adjacent to it are connected by means of cross-arms with the hinge axes, and the third electrode is designed for recording the magnetization chart of the magnetic tape. Sources of information taken into account in the examination 1. The author's certificate of the USSR 519627, cl. G 01 N 27/82, 1974.

2. Authors certificate of the USSR 688876, cl. G 01 N 27/82, 1977 1NPPP1Sh1 "|" tzhi1MP11111Shn I lMZhF

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