SU543868A1 - Electromagnetic transducer - Google Patents
Electromagnetic transducerInfo
- Publication number
- SU543868A1 SU543868A1 SU2199992A SU2199992A SU543868A1 SU 543868 A1 SU543868 A1 SU 543868A1 SU 2199992 A SU2199992 A SU 2199992A SU 2199992 A SU2199992 A SU 2199992A SU 543868 A1 SU543868 A1 SU 543868A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- coil
- electromagnetic transducer
- electromagnet
- magnetic
- converter
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Description
Изобретение относитс к неразрушающему контролю материалов и изделий и может быть использовано в ультразвуковой дефектоскопии , толщинометрии и дл других ультразвуковых измерений. Известен электромагнитоакустический преобразователь, содержащий импульсный электромагнит и высокочастотную катушку индуктивности Qfj , Наиболее близок к изобретению по тех- нической сущности и достигаемому результа ту электромагнитоакустический преобразователь , содержащий посто нный элш тр дагнит и высокочастотную катушку индуктивности, расположенную под полюсрм бго магнитопро . Недостатком этих преобразователей вл етс низкий уровень смещений возбуждаемых акустических колебаний и малое значение электрических сигналов при приеме упругих волн, что св зано с трудност ми полу чени высоких значений магнитной индукции вследствие насыщени ферромагнитного сердечника магнита. Цель изобретени - повышение эффективности; йреобразовател в режиме излучени путем увеличени амплитуды излучаемых акустических колебаний и повышение чувствительности в режиме приема усилени электрических импульсов на выходе преобразовател , соответствующих акустическим колебани м контролируемого издели . Дл этого предлагаемый преобразователь снабжен дополнительной катушкой импульсного намагничивани , расположенной между полюсом магнитопровода и высокочастотной катушкой индуктивности, включенной таким образом , что ее магнитное доле суммируетс с магнитным полем посто нного электромагнита. Катушка импульсного намагничивани быть выполнена в виде йлоского витка. На чертеже изображен предложенный преобразователь , Он содержит посто нный электромагнит с катушками 1,2 и магнитопроеодом 3, катушку 4 импульсного намагничивани и высокочастотную катушку 5 индуктивности. Катушка 4 расположена между полнхзомThe invention relates to non-destructive testing of materials and products and can be used in ultrasonic flaw detection, thickness gauging and for other ultrasonic measurements. The electromagnet-acoustic converter is known, which contains a pulsed electromagnet and a high-frequency inductance Qfj. The invention is closest to the invention in its technical essence and the achieved result: an electromagnet-acoustic converter that contains a constant elstomagnet and a high-frequency inductance coil located under the pole of the magnetic capacitance magnet. The disadvantage of these transducers is the low level of displacement of the excited acoustic oscillations and the small value of the electrical signals when receiving elastic waves, which is due to the difficulties of obtaining high values of magnetic induction due to saturation of the ferromagnetic magnet core. The purpose of the invention is to increase efficiency; The converter is in the radiation mode by increasing the amplitude of the emitted acoustic oscillations and increasing the sensitivity in the reception mode of amplifying electrical pulses at the output of the converter corresponding to the acoustic oscillations of the controlled product. For this, the proposed transducer is equipped with an additional pulsed magnetizing coil located between the pole of the magnetic circuit and the high-frequency inductance coil, connected in such a way that its magnetic fraction is summed with the magnetic field of the permanent electromagnet. Pulse magnetizing coil to be performed in the form of a ylok coil. The drawing shows the proposed transducer. It contains a permanent electromagnet with coils 1.2 and magnetic conductor 3, coil 4 of pulsed magnetization, and high-frequency coil 5 of inductance. Coil 4 is located between polhhzom
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2199992A SU543868A1 (en) | 1975-11-03 | 1975-11-03 | Electromagnetic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2199992A SU543868A1 (en) | 1975-11-03 | 1975-11-03 | Electromagnetic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU543868A1 true SU543868A1 (en) | 1977-01-25 |
Family
ID=20640658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU2199992A SU543868A1 (en) | 1975-11-03 | 1975-11-03 | Electromagnetic transducer |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU543868A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4450725A (en) * | 1981-06-10 | 1984-05-29 | Hitachi, Ltd. | Electromagnetic-acoustic measuring apparatus |
-
1975
- 1975-11-03 SU SU2199992A patent/SU543868A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4450725A (en) * | 1981-06-10 | 1984-05-29 | Hitachi, Ltd. | Electromagnetic-acoustic measuring apparatus |
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