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Electromagnetic ultrasonic surface wave transducer and design method thereof

A technology of electromagnetic ultrasonic and design method, which is applied in the generation of ultrasonic/sonic/infrasonic waves and the analysis of solids using sonic/ultrasonic/infrasonic waves, etc. The effect of improving the efficiency and the amplitude of the surface wave signal

Active Publication Date: 2014-10-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem of low energy conversion efficiency of existing electromagnetic ultrasonic surface wave transducers, and now provides an electromagnetic ultrasonic surface wave transducer and its design method

Method used

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  • Electromagnetic ultrasonic surface wave transducer and design method thereof
  • Electromagnetic ultrasonic surface wave transducer and design method thereof
  • Electromagnetic ultrasonic surface wave transducer and design method thereof

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specific Embodiment approach 1

[0033] Specific implementation mode one: refer to figure 1 Specifically explain this embodiment, an electromagnetic ultrasonic surface wave transducer described in this embodiment, which includes: a magnet 1, a meander coil 2 and a copper foil 3;

[0034] The meander coil 2 includes: a wire 2-1 and a skeleton 2-2, and the number of turns of the meander coil 2 is n, wherein n=5,6,7;

[0035] The skeleton 2-2 is a left-right symmetrical structure, and 2n wire slots are arranged along one side of the skeleton 2-2, and each wire slot is provided with a wire 2-1 zigzag arranged in the shape of a square wave, so as to Two adjacent wire grooves are one level, and the number of wires in the n wire grooves gradually decreases from the two ends of the meandering coil 2 to the center of the skeleton 2-2;

[0036] The lengths of the permanent magnet 1, the meandering coil 2 and the copper foil 3 are all equal, the widths of the meandering coil 2 and the copper foil 3 are equal, and the w...

specific Embodiment approach 2

[0042] Embodiment 2: This embodiment is a further description of the electromagnetic ultrasonic surface wave transducer described in Embodiment 1. In this embodiment, the wire 2-1 is an enameled wire wire.

specific Embodiment approach 3

[0043] Embodiment 3: This embodiment is a further description of the electromagnetic ultrasonic surface wave transducer described in Embodiment 1. In this embodiment, the thickness of the copper foil 3 is 0.1 mm.

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Abstract

The invention discloses an electromagnetic ultrasonic surface wave transducer and a design method thereof, and belongs to the technical field of electromagnetic ultrasonic. The invention aims at solving the problem of low efficiency of the existing electromagnetic ultrasonic surface wave transducer. According to the electromagnetic ultrasonic surface wave transducer, the size of a magnet and the structure of a coil are changed, and a zone with higher magnetic induction intensity and more horizontal components in a magnetic field is fully utilized, so that the working efficiency of the transducer is improved, and the amplitude of signals exciting surface waves is improved. Due to the complete design thought, the parameters of the magnet in the transducer do not need to be determined by multiple trials; and the efficiency of the transducer and the amplitude of the surface wave signals are further improved through the new structure of the zigzag coil. The invention can be widely applied to an electromagnetic ultrasonic device for detecting with the ultrasonic surface wave.

Description

technical field [0001] The invention belongs to the field of electromagnetic ultrasonic technology, and in particular relates to an electromagnetic ultrasonic transducer. Background technique [0002] Electromagnetic ultrasonic technology is a technology that uses electromagnetic ultrasonic transducers to excite ultrasonic waves in plates for non-destructive testing. Electromagnetic ultrasonic technology has simple conditions of use and an environmentally friendly process, so it has become a research hotspot in the nondestructive testing technology of aluminum alloy plates. The performance of the transducer in electromagnetic ultrasonic technology directly determines the effect of nondestructive testing. In the past, electromagnetic ultrasonic surface wave transducers often used magnets with a width larger than the coil width and coils with uniform distribution of turns of wire, and there was no complete design method for the magnets and coils, resulting in low conversion e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/34G01N29/07
Inventor 康磊金昱苏日亮张超潘峰蒋川流柳新王淑娟翟国富
Owner HARBIN INST OF TECH
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