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EMAT (Electro Magnetic Acoustic Transducer) control device, method and apparatus

A technology of electromagnetic ultrasound and control equipment, which is applied in the direction of measuring devices, ultrasonic/sonic/infrasonic generation, material analysis using sound/ultrasonic/infrasonic, etc. It can solve the problems of automatic adjustment of excitation signals, low detection reliability and efficiency problems, to achieve the effect of no coupling agent, improve detection accuracy, and improve detection efficiency

Pending Publication Date: 2019-01-18
CHINA SPECIAL EQUIP INSPECTION & RES INST +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] Embodiments of the present invention provide an electromagnetic ultrasonic sensor control device, method, and device to at least solve the technical problem in the related art that the excitation signal cannot be automatically adjusted, resulting in low detection reliability and efficiency

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  • EMAT (Electro Magnetic Acoustic Transducer) control device, method and apparatus
  • EMAT (Electro Magnetic Acoustic Transducer) control device, method and apparatus
  • EMAT (Electro Magnetic Acoustic Transducer) control device, method and apparatus

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Embodiment Construction

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0030] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses an EMAT (Electro Magnetic Acoustic Transducer) control device, method and apparatus. The device comprises an exciting unit, an EMAT main frequency monitoring unit, and a control processor, wherein the exciting unit is used for producing an excitation signal for exciting an EMAT; the EMAT main frequency monitoring unit is used for monitoring whether a working main frequencyof the EMAT is deviated or not when the EMAT executes detection on a detected object; and the control processor is used for adjusting, under a condition in which the EMAT main frequency monitoring unit monitors that the working main frequency of the EMAT is deviated, the excitation signal of the exciting unit, and controlling the EMAT to execute the detection on the detected object. According to the EMAT control device, method and apparatus provided by the invention, the technical problems of low detection reliability and efficiency due to the fact that the excitation signal cannot be automatically adjusted in the related art are solved.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to an electromagnetic ultrasonic sensor control device, method and device. Background technique [0002] In the actual detection process, the electromagnetic ultrasonic sensor (Electro Magnetic Acoustic Transducer, referred to as EMAT) is easily affected by factors such as the material to be tested, surface conditions, lift-off, and temperature, resulting in changes in the equivalent inductance, resistance and other parameters of the electromagnetic ultrasonic sensor EMAT , so that the static impedance matching network fails, which in turn causes the sensor's natural resonant frequency to drift. However, the inherent frequency drift will lead to a decrease in the output power of the sensor, which will significantly reduce the transduction efficiency of the electromagnetic ultrasonic sensor EMAT. At present, when the electromagnetic ultrasonic sensor EMAT is used for detection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/34
CPCG01N29/348G01N2291/0289
Inventor 张宗健郑阳周进节谭继东
Owner CHINA SPECIAL EQUIP INSPECTION & RES INST
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