Detecting and imaging method and detecting and imaging device based on broadband magnetic wave reflection path parameter identification

Abstract

The invention discloses a detecting and imaging method and a detecting and imaging device based on broadband magnetic wave reflection path parameter identification. According to the method, broadband magnetic wave is taken as a carrier, a path through which magnetic wave reflection passes is used as a reflection channel, and electromagnetic parameter characteristics of different materials is utilized, so that the internal distribution characteristics of a detected object can be identified through inversion and fusion on transfer functions and various variable forms and lossless detection and imaging can be realized. The device comprises a detection front end for detecting generation of signals, microwave transmission and reflection magnetic wave receiving, and a signal processing back end for controlling the setting of parameters, processing of receiving signals, inversion and fusion of a magnetic wave reflection path and imaging display, wherein the detection front end and the signal processing back end are connected in a wire / wireless manner, and by using software processing, the detection accuracy is improved, and the miniaturization of the equipment is conveniently realized. According to the embodiment of the invention, coupling agents, strong magnetic fields, radioactive sources and radio frequency radiation are not needed; the method and the device have the advantages of non-contact form, high accuracy, low cost and the like, and have wide application prospect in the fields of underground pipeline detection, road and bridge detection, industry and agriculture, medicines and the like.

Description

technical field [0001] The present invention relates to the fields of information technology, non-destructive testing, etc., and specifically relates to a parameter identification based on broadband magnetic wave reflection path that can be applied to defect target identification and imaging in groundwater oil and gas pipeline detection, highway bridge detection, industrial manufacturing detection, biological and human detection, etc. Detection and imaging methods and devices. Background technique [0002] Detection refers to the use of various physical and chemical effects to select suitable methods and devices to accurately characterize and analyze the properties, structures and defects of various objects, which can be used to improve product quality, product design, processing and manufacturing, finished product testing and The reliability and safety analysis of service equipment can also be used for clinical diagnosis and play an important role in social construction and...

AI Technical Summary

Problems solved by technology

[0004] 1) X-ray detection uses X-ray signals (frequency range: 30 PHz to 30EHz) as the information carrier, which requires high cost and X-rays are radioactive, which is harmful to the human body and the environment, and is large in size and expensive, so it is not suitable for large-scale scope of use

[0005] 2) Ultrasonic detection uses ultrasonic signals (frequency range: above 20KHz) as the information carrier, which has the advantages of high sensitivity, harmlessness to the human body, and low cost, but it needs to be close to the surface of the object and the coupling agent, which is not suitable for the detection of complex shaped objects

[0006] 3) Radar technology uses microwave signals (frequency range: 300MHz-300GHz) as the information carrier, and uses far-field scattering and reflection of electromagnetic waves to realize imaging. It will produce electromagnetic shielding and cannot spy on the internal structure of the measured object

At the same time, radar technology uses pulsed electromagnetic waves as the detection signal, which has high timing accuracy, short detection time, high instantaneous power, large hardware dynamic range, and works in the radio frequency band, so the hardware cost is high and the price is expensive.

4) NMR detection puts the measured object in a strong bias magnetic field and irradiates it with electromagnetic waves (frequency range 400MHz-800MHz) to change the rotation and arrangement direction of hydrogen atoms to make it resonate, and then analyze the electromagnetic waves it releases to obtain the object The internal stereoscopic imaging has the advantages of high imaging accuracy and no radiation damage to the human body, but it is not suitable for the case where there are ferromagnetic substances (such as: metal) inside the measured object, and at the same time, due to the radio frequency heating effect and strong noise, etc. Not suitable for long-term detection, and it is bulky, expensive, and requires a dedicated work site and environment

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