Electromagnetic ultrasonic detection system based on electromechanical hybrid frequency-modulation energy-gathered irradiation and method

Abstract

The invention provides an electromagnetic ultrasonic detection system based on electromechanical hybrid frequency-modulation energy-gathered irradiation. The system employs a plurality of associate coil pairs of an electromechanical hybrid apparatus to generate an alternative electromagnetic field, the mechanical motion of the apparatus enables a static magnetic field to be converted into an alternative magnetic field, and a regularly-leaked transmitting terminal magnetic field leads to energy gathering at a detection object and forms a wideband frequency-modulation supersonic wave source. The ultrasonic wave oscillates on the surface of the detection object and generates an electromagnetic field after being reflected in the detection object. An magnetic-induction reception array, which is arranged at a position where the intensity of the alternative electromagnetic field generated by the multiple associate coil pairs and the static magnetic field are both weak, is utilized for inducing variation of the induced electromagnetic field, thereby receiving ultrasonic reflection wave signal. The magnetic field generated by permanent magnet does not have the conversion loss from electric energy to magnetic energy, the conversion energy efficiency is high, the magnetic field energy is gathered, the emission efficiency is improved, reception noise is reduced, detection precision is high, and the system and the method are relatively applicable to detection during operation, fixed-point heating auxiliary treatment, noninvasive lossless detection on iron ion in blood, and the like.

Description

technical field [0001] The invention relates to electromagnetic ultrasonic detection technology, in particular to a device and method for generating an energy-gathering alternating electromagnetic field and an alternating magnetic field by using an electromechanical hybrid device, causing eddy currents on the surface of a detection object, and generating an ultrasonic wave source for detection. Background technique [0002] Ultrasonic detection is mainly to use the transmitted ultrasonic wave to receive the reflected wave after being reflected by the detection object, and analyze the transmitted wave and reflected wave to invert the distribution function of some acoustic parameters of the detection target, so as to determine the material, thickness, position and size of the internal defect of the detection target. etc. for evaluation. The application of ultrasonic detection mainly includes the detection of various materials in industry and the detection and diagnosis of huma...

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Problems solved by technology

[0007] Aiming at the current electromagnetic ultrasonic detection alternating magnetic field generation method is mainly based on alternating current, the frequency band of the ultrasonic signal generated is not wide, the conversion loss of electric energy to...

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