Electromagnetic ultrasonic detection probe

An electromagnetic ultrasonic and detection probe technology, which is used in measurement devices, materials analysis using sonic/ultrasonic/infrasonic waves, instruments, etc. It can solve the problems of large probe volume and complex echo analysis, and achieve the effect of high receiving sensitivity

Inactive Publication Date: 2013-01-16
NANTONG TIANHUA HERUI TECH VENTURES
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In recent years, electromagnetic ultrasonic probes with SH guided waves have also appeared in China. For example, Chinese patent CN102023186A designed an electromagnetic ultrasonic probe that can excite SH waves for pipeline inspection. The transmitting and receiving probes are separated and more magnets are used. The volume of the probe is Relatively large, and the echo analysis is more complicated

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Embodiment 1

[0023] Such as figure 1 , 2 As shown, the transceiving switchable SH guided wave electromagnetic ultrasonic probe consists of eight permanent magnets 1, three racetrack-shaped planar coils 3 with the same geometric dimensions, a non-magnetic material sheet 2, a carbon steel sheet 5 on the top of the permanent magnet 1, and a probe protection layer , housing, capacitors C1, C2 and switches S1, S2, S3, S4, S5, 6 represents the workpiece to be detected.

[0024] Among them, the permanent magnet 1 is a NdFeB permanent magnet, and the magnetic poles of the eight permanent magnets 1 are alternately arranged and attached to the carbon steel sheet 5 on the top, and the magnets are separated by non-magnetic material sheets 2 (plastic sheets or paper sheets). A racetrack-shaped planar coil 3 is pasted on the lower end of the permanent magnet 1, and three racetrack-shaped planar coils 3 are connected with the switches S1, S2, S3, S4, S5 and capacitors C1 and C2. Figure 4 Form connecti...

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PUM

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Abstract

The invention discloses an electromagnetic ultrasonic detection probe, which consists of one or more than one pair of permanent magnets, a non-magnetic material spacer, two or more runway-shaped planar coils, a carbon steel sheet, a probe protection layer, a shell, a capacitor and a changeover switch. The electromagnetic ultrasonic detection probe is characterized in that the runway-shaped planar coils are runway-shaped coils which are formed by winding enameled wires or made of printed circuit boards (PCB). The electromagnetic ultrasonic detection probe has the advantages that switching of the transmission/receiving operation of the same electromagnetic ultrasonic probe is realized by using excitation signals on the coils; when the probe serves as a transmitting probe, all runway-shaped coils are connected in parallel to supply high excitation energy; and when the probe serves as a receiving probe, all runway-shaped coils are connected in series to realize high receiving sensitivity. The electromagnetic ultrasonic probe can excite and receive shear horizontal (SH) wave in a metal pipeline or a flat plate, and the pipeline and the flat plate can be subjected to flaw detection by using only one probe.

Description

technical field [0001] The invention relates to electromagnetic ultrasonic detection technology, in particular to an electromagnetic ultrasonic probe mainly based on the Lorentz force type, which can excite SH guided waves in a flat plate and circumferential SH waves in a pipe wall. Background technique [0002] Ultrasonic guided wave testing technology is an emerging non-destructive testing technology. It does not need to scan point by point, and can detect a flat plate or a section of pipe at a time, which has the advantage of high detection efficiency. If the electromagnetic ultrasound and guided wave technology are integrated to give full play to their respective advantages, then non-contact rapid detection can be realized, which has broad application prospects in the industrial field. In recent years, electromagnetic ultrasonic probes with SH guided waves have also appeared in China. For example, Chinese patent CN102023186A designed an electromagnetic ultrasonic probe t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/24
Inventor 季历程
Owner NANTONG TIANHUA HERUI TECH VENTURES
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