JPS55122148A - Electromagnetic ultrasonic wave converter - Google Patents
Electromagnetic ultrasonic wave converterInfo
- Publication number
- JPS55122148A JPS55122148A JP2999879A JP2999879A JPS55122148A JP S55122148 A JPS55122148 A JP S55122148A JP 2999879 A JP2999879 A JP 2999879A JP 2999879 A JP2999879 A JP 2999879A JP S55122148 A JPS55122148 A JP S55122148A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- coils
- electromagnet
- ultrasonic wave
- wave converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE: To obtain a light, miniaturized, low-price electromagnetic ultrasonic wave converter by connecting an erase coil to a receiving coil in an opposite phase so as to offset the influence thereupon of the electromagnetic energy of a transmitting coil, whereby the excitation current for an electromagnet is reduced remarkably.
CONSTITUTION: An electromagnetic ultrasonic wave converter 1 consisting of an electromagnet 7, a transmitting coil 8, a receiving coil 9, an insulating plate 10 and an erase coil 11 is formed. In this structure the erase coil 11 is connected to the receiving coil 9 such that the coils 11, 9 have 180° phase difference. The coils 11, 9 are connected to an eddy current detection circuit 5 so that the coils 11, 9 offset the influence thereupon of the electromagnetic energy receiving from the coil 8. Accordingly, the offsetting of reflected ultrasonic signals can be minimized in spite of the difference between the coils 9, 11 in the distance from a material subjected to flaw detection and in the signal sensitivity due the difference in the mentioned distance. This structure permits minimizing the excitation current for the electromagnet and reducing a dead zone of a detected wave form. Therefore, the number of areas whose flaws are beyond detection is largely reduced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2999879A JPS55122148A (en) | 1979-03-16 | 1979-03-16 | Electromagnetic ultrasonic wave converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2999879A JPS55122148A (en) | 1979-03-16 | 1979-03-16 | Electromagnetic ultrasonic wave converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55122148A true JPS55122148A (en) | 1980-09-19 |
Family
ID=12291588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2999879A Pending JPS55122148A (en) | 1979-03-16 | 1979-03-16 | Electromagnetic ultrasonic wave converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55122148A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016191573A (en) * | 2015-03-31 | 2016-11-10 | Ｊｆｅスチール株式会社 | Ultrasonic flaw detection device, ultrasonic flaw detection method, and method of manufacturing steel |
-
1979
- 1979-03-16 JP JP2999879A patent/JPS55122148A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016191573A (en) * | 2015-03-31 | 2016-11-10 | Ｊｆｅスチール株式会社 | Ultrasonic flaw detection device, ultrasonic flaw detection method, and method of manufacturing steel |
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