Electromagnetic ultrasonic sensor
The invention provides an electromagnetic ultrasonic sensor which comprises a shell, a permanent magnet assembly and a first hollow coil, the permanent magnet assembly and the first hollow coil are arranged in the shell, the permanent magnet assembly comprises a first permanent magnet and a second p...
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| Hauptverfasser: | , , , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention provides an electromagnetic ultrasonic sensor which comprises a shell, a permanent magnet assembly and a first hollow coil, the permanent magnet assembly and the first hollow coil are arranged in the shell, the permanent magnet assembly comprises a first permanent magnet and a second permanent magnet, the second permanent magnet and the first permanent magnet are coaxially arranged, and the first permanent magnet is sleeved with the second permanent magnet; the magnetic field directions of the first permanent magnet and the second permanent magnet are opposite; the first hollow coil is arranged below the first permanent magnet, the first hollow coil and the permanent magnet assembly are coaxially arranged, and the outer diameter of the first hollow coil is smaller than or equal to the outer diameter of the first permanent magnet; the permanent magnet assembly and the first hollow coil are sleeved with the shell, the shell is provided with an insertion port, and the insertion port is electrically |
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