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Design method of electromagnetic ultrasonic body wave transducer

A technology of electromagnetic ultrasound and design method, applied in the direction of instrumentation, calculation, electrical digital data processing, etc., can solve the problems of weak excited body wave signal and multiple wave modes of excited body wave signal, and achieve easy analysis, simple modeling process, Simple operation effect

Inactive Publication Date: 2013-06-12
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention proposes a design method for an electromagnetic ultrasonic body wave transducer in order to solve the problems of weak excitation body wave signals and many wave modes in the excitation body wave signals of existing electromagnetic ultrasonic body wave transducers

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  • Design method of electromagnetic ultrasonic body wave transducer
  • Design method of electromagnetic ultrasonic body wave transducer
  • Design method of electromagnetic ultrasonic body wave transducer

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, a new type of electromagnetic ultrasonic body wave transducer modeling and optimization design method described in this embodiment, the realization of the design method requires a complete modeling of the electromagnetic ultrasonic body wave transducer transmitting and receiving process , accurately describe the working process of the electromagnetic ultrasonic body wave transducer, analyze the influence of different transducer parameters on the strength of the received echo signal and the purity of the acoustic wave mode, so as to obtain the transducer parameter combination with the optimal performance parameters, and have a great impact on the electromagnetic ultrasonic body wave transducer The transducer is designed; the model mainly includes a permanent magnet 1, an electromagnetic ultrasonic transducer coil 2, a metal specimen to be tested 3, a thinning layer 4, a defect 5 an...

specific Embodiment approach 2

[0034] Embodiment 2: In this embodiment, in step 5, the frequency of the Tone-Burst signal with a certain frequency is 1-10 MHz. Other steps are the same as in the first embodiment.

Embodiment

[0035] Example: Combined Figure 1 to Figure 5 Describe this embodiment, this embodiment is a specific embodiment of a novel electromagnetic ultrasonic body wave transducer design method described in Specific Implementation Mode 1;

[0036] The metal test piece 3 is a cylindrical aluminum block with a thickness of 45 mm, the permanent magnet 1 is made of NdFeB material, and the distance from the coil 2 of the electromagnetic ultrasonic body wave transducer is 1 mm, the diameter d of the permanent magnet 1 is 25 mm, and the height h is 30mm, the spacing a of the wires in the electromagnetic ultrasonic transducer coil 2 is 1mm, the width w is 0.5mm, the number of turns n is 16, the distance between the electromagnetic ultrasonic body wave transducer coil 2 and the metal test piece 3 is 0.5mm, and the defect 5. The height is 15mm, the width is 2mm, and the distance from the central axis of the model is 2mm. The electromagnetic ultrasonic body wave transducer coil 2 is fed into th...

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Abstract

The invention discloses a design method of an electromagnetic ultrasonic body wave transducer, relating to a design method of an electromagnetic ultrasonic body wave transducer, solving the problems of the weak excited body wave signal of the existing electromagnetic ultrasonic body wave transducer and more wave modes in the excited body wave signal. The design method comprises the main steps of: defining parameters required by modeling; establishing a geometric model of each part; setting material attributes; dividing a physical field solving region; modeling an emitting process; modeling a receiving process; partitioning a net of a finite element and solving the finite element; and finding out key parameters influencing induction voltage signal strength and sound wave mode purity in an electromagnetic ultrasonic body wave transducer coil 2, calculating a transducer parameter when the signal of the electromagnetic ultrasonic body wave transducer is strongest and the sound wave mode is optimal, and designing the electromagnetic ultrasonic body wave transducer. The design method has the characteristics that the simplicity is achieved in operation and the influence of the parameters of the electromagnetic ultrasonic body wave transducer to the induction voltage signal is easily analyzed. The design method can be widely applied to the design of the infinite element of any electromagnetic ultrasonic body wave transducer.

Description

technical field [0001] The invention relates to a design method of an electromagnetic ultrasonic body wave transducer. Background technique [0002] Electromagnetic ultrasonic body wave transducers can effectively excite ultrasonic body waves in metal specimens, and have been widely used in the fields of electromagnetic ultrasonic nondestructive testing and nondestructive evaluation. In order to facilitate the generation and reception of body wave signals, the general working mode of electromagnetic ultrasonic body wave transducers is the integrated transceiver mode, that is, an electromagnetic ultrasonic body wave transducer not only generates body waves but also receives body wave echo signals. The coil forms of electromagnetic ultrasonic body wave transducers mainly include helical coils, racetrack coils and butterfly coils, and different forms of coils need to be equipped with corresponding magnetic fields to effectively excite body waves. Among them, the electromagneti...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 翟国富汪开灿王亚坤蒋韬邱玉王吉宇蒋川流康磊王淑娟
Owner HARBIN INST OF TECH
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