SU548800A1 - Device for ultrasonic inspection of products - Google Patents
Device for ultrasonic inspection of productsInfo
- Publication number
- SU548800A1 SU548800A1 SU2066301A SU2066301A SU548800A1 SU 548800 A1 SU548800 A1 SU 548800A1 SU 2066301 A SU2066301 A SU 2066301A SU 2066301 A SU2066301 A SU 2066301A SU 548800 A1 SU548800 A1 SU 548800A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- products
- signals
- ultrasonic inspection
- modulation
- transducer
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
ность радиоимпульсов с частотами заполнени fb /2. ... /и. Генератор 3 вырабатывает напр жение внутриимпульсной модул ции частоты с заданием законом модул ции, т. е. обеспечивает расстройку частоты на величину Д/,-. Суммарна последовательность радиоимпульсов, подаваема на преобразователь 2, таким образом , запишетс в видеthe frequency of radio pulses with filling frequencies fb / 2. ... / and. The generator 3 produces the voltage of the intrapulse frequency modulation with the setting of the modulation law, i.e., it provides a frequency detuning of D /, -. The total sequence of radio pulses supplied to transducer 2 is thus written as
/i+A/i; /2+А/2; ... /п+А/п./ i + A / i; / 2 + A / 2; ... / p + a / p.
После излучени зондирующих импульсов преобразователем 2 принимаютс сигналы, отраженные от дефектов, и сигналы помех, св занные с боковыми лепестками. Эти сигналы усиливаютс и стробируютс приемным блоком 4.After the probe pulses have been emitted by transducer 2, signals reflected from defects and noise signals associated with side lobes are received. These signals are amplified and gated by the receiving unit 4.
В фильтре 5 происходит усреднение общего уровн сигналов от боковых лепестков и полное подавление в зоне, где эти сигналы наход тс в противофазе относительно друг друга. Мен глубину внутриимпульсной модул ции, можно измен ть ширину зон полного подавлени бокового излучени , а мен закон внутриимпульспой модул ции, можно измен ть зону подавлени . Так при синусоидальном законе внутриимпульсной модул ции подавление охватывает большинство дальних лепестков диаграммы направленности.In filter 5, the overall level of signals from side lobes is averaged and complete suppression occurs in the zone where these signals are out of phase relative to each other. By varying the depth of the intrapulse modulation, it is possible to change the width of the zone of complete suppression of side radiation, and changing the law of intrapulse modulation, it is possible to change the zone of suppression. So with the sinusoidal law of intrapulse modulation, the suppression covers most of the far lobes of the radiation pattern.
Блок 6 обеспечивает обработку прин тых сигналов в соответствии с требуемой задачей.Unit 6 provides processing of received signals in accordance with the required task.
Например, при определении характера и размеров дефектов, блок 6 производит спектральный анализ сигналов, отраженных от дефектов , и сравнение с эталонными спектрами.For example, when determining the nature and size of defects, unit 6 performs a spectral analysis of signals reflected from defects, and a comparison with reference spectra.
Форм у л а изобретен и Formula is invented and
Устройство дл ультразвукового контрол изделий, содержащее генератор зондирующих импульсно-частотномодулированных колсбаПИЙ , соедипениый с его выходом широкоиолосный преобразователь, широкополосный приемный блок, подключенный к преобразователю,A device for ultrasonic testing of products, comprising a generator of a pulse-frequency modulated pulse, connected with its output wide-band transducer, a broadband receiving unit connected to the transducer,
и блок обработки прин тых сигналов, ОТЛ чающийс тем, что, с целью повышени надежности контрол , оно снабжено дополнительным генератором внутриимлульсной частотной модул ции, подключенным к входу генератора зондирующих импульсов, и сглаживающим фильтром, включенным между прие .мным блоком и блоком обработки сигналов.and a processing unit for receiving signals, RELEVANT to the fact that, in order to increase the control reliability, it is equipped with an additional intra-pulse frequency modulation generator connected to the input of the probe pulse generator and a smoothing filter connected between the receiving unit and the signal processing unit.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2066301A SU548800A1 (en) | 1974-10-21 | 1974-10-21 | Device for ultrasonic inspection of products |
| FR7505775A FR2273436A1 (en) | 1974-02-26 | 1975-02-25 | Wideband ultrasonic measuring transducer - is made of piezoelectric material in form of rotational body with electrodes on two surfaces |
| DE19752508023 DE2508023C3 (en) | 1974-02-26 | 1975-02-25 | Broadband ultrasonic transducer and its application |
| JP50022978A JPS5198080A (en) | 1974-02-26 | 1975-02-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2066301A SU548800A1 (en) | 1974-10-21 | 1974-10-21 | Device for ultrasonic inspection of products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU548800A1 true SU548800A1 (en) | 1977-02-28 |
Family
ID=20598018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU2066301A SU548800A1 (en) | 1974-02-26 | 1974-10-21 | Device for ultrasonic inspection of products |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU548800A1 (en) |
-
1974
- 1974-10-21 SU SU2066301A patent/SU548800A1/en active
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