CN104655714B - Detection and imaging method and device based on wideband magnetic wave reflex path parameter identification - Google Patents
Detection and imaging method and device based on wideband magnetic wave reflex path parameter identification Download PDFInfo
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Abstract
The present invention discloses a kind of detection based on wideband magnetic wave reflex path parameter identification and imaging method and device.This method is using wideband magnetic wave as carrier, magnetic wave is reflected into undergone path and is considered as reflex path, non-destructive testing and imaging are realized by the inside distribution characteristics of inverting and fusion recognition testee to transmission function and its various change form in conjunction with the electromagnetic parameter feature of unlike material.Device includes being responsible for the generation of detection signal, magnetic wave transmitting and the reflection received detection front end of magnetic wave, it is responsible for control parameter setting, receives signal processing, the signal processing rear end of the inverting of magnetic wave reflex path, fusion and imaging display, the two is connected with wire/wireless, it is handled using software and improves detection accuracy, be convenient for device miniaturization.The present invention is not necessarily to couplant, high-intensity magnetic field, radioactive source in implementing, no radio-frequency radiation, has many advantages, such as contactless, high-precision, at low cost, detects in underground piping detection, road and bridge, the fields such as industrial or agricultural and medicine have wide application prospects.
Description
Technical field
The present invention relates to the fields such as information technology, non-destructive testing, and in particular to one kind can be applied to underground water oil-gas pipeline
Detection, highway bridge detection, industry manufacture detection, the defect target identification of biology and human testing etc., imaging based on wideband
The detection of magnetic wave reflex path parameter identification and imaging method and device.
Background technique
Detection refers to using various physical chemistry effects, selects suitable mode and device, attribute, knot to each type objects
The progress such as structure, defect accurately it is qualitative and analysis, can be used for improving production quality, product design, processing and manufacturing, finished product detection with
And the reliability and safety analysis of military service equipment, it may also be used for clinical diagnosis plays weight in social construction and economic development
It acts on.Detection technique is mainly two major classes: non-destructive testing and damaging detection.Wherein damaging detection has wound to testee
Evil, modern technologies develop to non-destructive testing.
Non-destructive testing, which refers to, not to be damaged or is not influencing not injured by measured object service performance by measured object interior tissue
Under the premise of, using the exception or defect of material internal structure there are the variation of caused heat, sound, light, electricity, magnetic etc., by
The method that the relevant technologies and equipment are detected and tested to the structure of object, property, shape, position, distribution and its variation.It is existing
There are many some lossless detection methods, and can reach imaging effect in practical applications mainly has following 4 kinds: X-ray check technology surpasses
Sonic detection technology, Microwave Detecting Technology and magnetic resonance detection technology.Summarize above 4 kinds of technologies and equipment, be primarily present with
Lower problem:
1) X-ray check is used as information carrier using X-ray signal (frequency range: 30 PHz to 30EHz), needs higher
There are radioactivity for cost and X-ray, harmful to human body, environment, and volume is big, involves great expense, thus are not suitable for a wide range of use.
2) ultrasound examination is used as information carrier by ultrasonic signal (frequency range: 20KHz or more), has sensitivity
Height, it is harmless, at low cost the advantages that, but need to be close to object table and couplant, be not suitable for the detection of complex structure.
3) Radar Technology is used as information carrier using microwave signal (frequency range: 300MHz-300GHz), utilizes electromagnetic wave
Far Field Scattering, reflection realize imaging, have many advantages, such as that imaging precision height, human body are harmless, contactless, but encounter metallics
The internal structure that is electromagnetically shielded and can not spy upon testee can be generated.Radar Technology is using pulsed electromagnetic wave as inspection simultaneously
Signal is surveyed, timing accuracy is high, detection time is short, instantaneous power is high, and hardware dynamic range is big, and works in radio-frequency range, therefore
Hardware cost is high, expensive.4) testee is placed in powerful bias magnetic field by magnetic resonance detection, with electromagnetic wave (frequency
Range 400MHz-800MHz) irradiation, it is rotatably arranged direction with change hydrogen atom, is allowed to resonate, then analyzes the electricity that it is discharged
Magnetic wave has many advantages, such as imaging precision height to obtain the three-dimensional imaging of interior of articles, to human body radiation damage free, but it is not applicable
There is the case where ferromagnetic material (such as: metal) inside testee, simultaneously because radio frequency thermal effect, generation very noisy etc. make
It is not suitable for detecting for a long time, and volume is big, expensive, and needs special work-yard and environment.
However according to electromagnetic theory, the essence of electromagnetic wave be mutually convert in space and periodically variable electric field and
Magnetic field is the general name of electric wave and magnetic wave.According to Maxwell equation, the variation of the charge or electric field of movement can generate magnetic field i.e. magnetic
Wave, and detected material will affect the distribution and intensity in magnetic field due to material, the difference of spatial distribution, can be used for non-destructive testing and at
As application.In view of this, the present invention propose a kind of detection based on wideband magnetic wave reflex path parameter identification and imaging method and
Device, relative to existing non-destructive testing and imaging system, using wideband magnetic wave as information carrier, using hot-wire coil as magnetic wave
Transmitting unit can realize low frequency signal (such as: small-bore transmitting 20KHz-25KHz)；Therefore the present invention is with contactless, smart
The advantages that high, harmless to humans, environment loss is small, bore probe is small, small in size, low-power consumption, simple and at low cost hardware is spent, is applicable in
In applications such as Distributed Detection, on-line checking, mobile detection, long-range detections, in the detection of underground water oil-gas pipeline, highway
The fields such as bridge machinery, industry manufacture detection, biology and human testing have wide practical use.
Summary of the invention
Present invention aims to overcome that many deficiencies of existing nondestructive detection system, information theory, Computational electromagnetics are had
It combines to machine, proposes a kind of detection based on wideband magnetic wave reflex path parameter identification and imaging method and device, specifically
Principle is as follows:
According to the Ampere theorem of Maxwell equation, the electric field of variation generates magnetic field, and magnetic field generates magnetic flux in certain curved surface,
Magnetic flux, that is, magnetic induction intensity of unit area.Wherein, the relationship in the magnetic induction intensity of magnetic material and magnetic field can be bent with magnetic hysteresis
Line indicates that the curve is linear change in partial region.Magnetic induction intensity is with the spatial parameter of measured object, material simultaneously
Magnetic parameter, electrical parameter etc. are closely related.Theorem is incuded by faraday again, changing magnetic field can induced electric field, generate induced electricity
Kinetic potential, size are directly proportional to change rate of the magnetic flux to the time.Therefore, according to the magnetic signal of the electric current of transmitting coil and reflection
Receiving coil, magneto sensor (such as: Hall element, magnetoresistive element, magnetostriction element, magnetodiode, magnetic sensitive transistor
Deng) generate induced electromotive force, induced current, the information such as induced impedance and the characteristic of testee can be estimated.Whole system
It is the Transmission system for being wirelessly transferred carrier that one, which is considered as, with magnetic wave, and the path of transmission can be regarded as a reflex path magnetic
Channel.If suitably controlling the electric current and its physique of transmitting coil, field bit can be made in the linear of B-H loop
Part, whole system work in linear region, are equivalent to the FIR filter of high-order, the magnetic can be indicated with linear transfer function
The characteristic of channel.Therefore by analyzing the transmission function and its various change form of the magnetic channel, its various parameters is recognized, is obtained
The information such as material, the spatial distribution of testee, and can be aobvious with two dimension or three-dimensional according to the situation of change of some or multiple parameters
It is shown as picture.
According to the inversion principle of principles above and combination reflex path magnetic channel transfer functions, the present invention proposes that one kind is based on
The detection of wideband magnetic wave reflex path parameter identification and imaging method and device.Magnetic conductivity, dielectric constant of different materials etc. are
It is different, there is anisotropy, therefore the magnetic resistance that different materials are presented in same magnetic field is different.Therefore, in same magnetic field
In, it, will be by the magnetic of magnetic wave reflex path using receiving coil or various magneto sensors as the receiver of magnetic wave reflection signal
Wave signal is converted into electric signal, according to transmitting signal and reflection signal can be finally inversed by the probe (containing transmitting coil, receiving coil and
Various magneto sensors) where fillet space reflex path magnetic channel transfer characteristic.Pass through transmitting-receiving array or moving sweep
Etc. modes, three-dimensional fusion, available face transmitting are realized to the transmission function of fillet space inversion locating for Transmit-Receive Unit
Function or body transmission function, and aerial image is carried out according to the characteristic of channel of magnetic wave reflex path, imaging results reflect tested
Shape, material, structure, spatial distribution and its motion conditions of object etc..
In order to reach the goals above, the detection and imaging of the present invention based on wideband magnetic wave reflex path parameter identification
Device includes detection front end, signal processing rear end two parts, and respective structure is as follows:
The detection front end of the detection and imaging device based on wideband magnetic wave reflex path parameter identification is described device
Sensor, specifically by communication module, detection signal generating module, array probe, reflection signal pre-processing module, moving sweep
Module, controller, memory and power supply composition, the function and structure of modules are as described below:
The communication module of above-mentioned detection front end is for realizing the communication for detecting front end and signal processing rear end, by signal processing
Control information that rear end generates etc. receives, and is transferred to the detection signal generating module of detection front end；Array probe is received
Magnetic wave reflection signal through reflection signal pre-processing module processing is transferred to signal processing rear end.Include signal transmitting and receiving unit, number
According to transmission interface unit.It can be used wired or wirelessly carry out data transmission.
The control parameter information that the detection signal generating module of above-mentioned detection front end will be obtained from communication module generates function
The controllable multi-channel wideband orthogonal electrical signal of the parameters such as rate, centre frequency, phase, bandwidth includes digital-to-analogue to motivate array probe
Converting unit, phase control unit, power amplification unit, filter unit, feeding network unit.
The wideband orthogonal electrical signal that the array probe of above-mentioned detection front end will test signal generating module generation is converted into magnetic
Signal emits to testee and receives magnetic wave reflection signal.It is made of multiple wire coils and magneto sensor, wherein metal wire
(hub of a spool can place different materials to circle according to application demand, such as air, magnetic material, and according to the practical feelings of test object
Condition selects winding method) it is arranged in array composition, various magneto sensor (Hall element, magnetoresistive element, magnetic in a manner
Cause telescopic element, magnetodiode, magnetic sensitive transistor etc.) it is placed between coil, each coil, which can according to need, to be set as
Transmitting receives both of which, detects at least one coil every time and is set as emission mode, is responsible for transmitting detection magnetostatic wave signal,
Magneto sensor and the coil for being set as reception pattern are responsible for receiving magnetic wave reflection signal.
The reflection signal pre-processing module of above-mentioned detection front end reflects various types of magnetic waves that array probe receives
Signal denoised, removes the pretreatments such as mutual inductance and self inductance effect between coil and between coil and magneto sensor, is then led to
It crosses communication module and is sent to signal processing rear end, include filter unit, low noise amplifying unit and AD conversion unit.
The motion-control module of above-mentioned detection front end is responsible for controlling and perceiving the movement of array probe, list containing motion motor
Member, GPS positioning unit.
The controller of above-mentioned detection front end is responsible for the work of the control detection each functional module in front end.
The memory of above-mentioned detection front end is used to cache the data of the detection each functional module in front end.
The power supply of above-mentioned detection front end is responsible for the power supply to detection front end modules, device.
The signal processing rear end of the detection and imaging device based on wideband magnetic wave reflex path parameter identification can be
One computer or network cloud processing terminal are the data processing terminals of described device, are specifically led to by communication module, magnetoreflection
Road characteristic inverting module, reflex path Fusion Module, imaging display module, human-computer interaction module, processor, memory and power supply
Composition, the function and structure of modules are as described below:
The communication module of above-mentioned signal processing rear end will be examined for realizing signal processing rear end and the communication for detecting front end
The magnetic wave reflection signal for surveying front-end detection is transferred to magnetoreflection characteristics of channel inverting module.It is passed comprising signal transmitting and receiving unit, data
Defeated interface unit.It can be used wired or wirelessly carry out data transmission.
The magnetoreflection characteristics of channel inverting module of above-mentioned signal processing rear end is a computer software module, is acted on
Identification and inverting are carried out in the analytic solution and its parameter attribute of the magnetoreflection access to single fillet space, and by result
Pass to reflex path Fusion Module.
The reflex path Fusion Module of above-mentioned signal processing rear end is a computer software module, and its role is to by battle array
The magnetoreflection access for arranging each fillet space of probe carries out multidimensional fusion, obtains the inner parameter characteristic of testee, and will
Fusion results are transferred to imaging display module.
The imaging display module of above-mentioned signal processing rear end is to the two dimension of array probe and its moving sweep, three-dimensional magnetoreflection
The characteristics of channel are imaged and are shown, show software unit, display unit comprising computer generated image.
The human-computer interaction module of above-mentioned signal processing rear end provides interface and the peripheral hardware of human-computer interaction.
The processor of above-mentioned signal processing rear end is responsible for handling the data of each functional module in signal processing rear end.
Data of the memory of above-mentioned signal processing rear end for the buffered signal processing each functional module in rear end.
The power supply of above-mentioned signal processing rear end is responsible for the power supply to signal processing rear end modules, device.
Another object of the present invention is to propose a kind of detection and imaging based on wideband magnetic wave reflex path parameter identification
Method, specific implementation step include:
Step 1: device control parameters setting.Testing staff passes through the human-computer interaction peripheral hardware of device signal processing rear end, if
Set the control parameter of device.The control parameter of setting includes: transmission signal parameters；Communication module parameter；The coil of array probe
State parameter (such as: transmitting receives), and it is set as the transmission signal parameters of the coil of emission state；Receive parameter setting；Magnetic letter
Road transmission characteristic inverting module parameter；Channel Fusion Module parameter；Display module parameter is imaged.
Step 2: appliance arrangement state detects automatically.Step state detected includes: detection front end and signal processing
The communication module connection status of rear end, the connection status of detection front end inside modules, each mould in signal processing rear end inside
The connection status of block.
Step 3: the gain calibration before detection.Wherein gain calibration mode includes two kinds: manual gain and automatic gain；Hand
Dynamic gain calibration mode is by testing staff according to the various gain parameters of the featured configurations such as the structure of measured object and property；Automatic gain
Calibrating mode is then after obtaining certain sample in measured object, and the spies such as measured object structure and property are estimated in signal processing rear end automatically
The various gain parameters of property；Wherein gain parameter includes various magnetic parameters, electrical parameter etc. of the magnetic wave in various dielectric materials,
The gain size of various time points, bandpass filtering frequency bandwidth, contrast size.
Step 4: device detects initial calibration.The transmission signal parameters information according to set by step 1, signal processing rear end
Control parameter information is generated, and generates multi-channel wideband via the detection signal generating module that communication module is transferred to detection front end
Orthogonal electrical signal, each transmitting coil of array probe by electric signal excitation, to no detectable substance spatial emission magnetostatic wave signal.Battle array
The magneto-dependent sensor of each receiving coil and coil peripherals that arrange probe receives magnetic wave and reflects signal, while magnetic wave is reflected signal
It is transferred to reflection signal pre-processing module.Signal pre-processing module is reflected to sense the magnetosensitive of each receiving coil and coil peripherals
The magnetic wave reflection signal and its parameter attribute that device receives store, and are recorded as the initial calibration data of device.This step
Effect when being to be recorded in no measured object, array probe is by between wire coil and between wire coil and magneto sensor
The parameter information of the reflection signal of magnetic wave caused by mutual inductance and self inductance effect etc..
Step 5: transmitting magnetostatic wave signal.After it experienced step 4, array probe is directed at object to be detected, while root
According to the coil state parameter of transmission signal parameters information, array probe set by step 1, the coil hair that setting state is transmitting
The parameter of signal is penetrated, signal processing rear end generates control parameter information, and the detection of detection front end is transferred to via communication module
Signal generating module generates multi-channel wideband orthogonal electrical signal, each transmitting coil of array probe by electric signal excitation, to
Testee emits magnetostatic wave signal.
Step 6: receiving magnetic wave and reflect signal.The reception parameter information according to set by step 1, each of array probe connect
The magneto sensor of take-up circle and coil peripherals receives magnetic wave and reflects signal, and is transferred to reflection signal pre-processing module, and with step
The rapid 4 device initial calibration datas recorded are handled together, to remove array probe in no measured object, by between wire coil
And magnetic wave caused by the mutual inductance between wire coil and magneto sensor and self inductance effect etc. reflects signal, obtains measured object institute
The amendment reflection signal of each receiving coil and magneto-dependent sensor that generate is transferred to signal processing rear end by communication module
Magnetoreflection characteristics of channel inverting module.
Step 7: magnetoreflection access inverting.According to the information for the transmitting detection signal that step 1 configures, step 6 is received to be repaired
The information of positive reflection signal, magnetoreflection characteristics of channel inverting module are finally inversed by the transmission function and its various transformation of magnetoreflection access
Form (such as: time domain transformation, frequency-domain transform).Again according to described above, from electric field Induced magnetic field, testee is passed through in magnetic field,
Changing magnetic field induced electric field, spatial distribution, internal structure, material properties of testee etc. can have in transmission function
Reflected, it, can inverting according to the characteristic of the magnetic parameter (such as: magnetic conductivity) of material, electrical parameter (such as: dielectric constant, conductivity)
Out on the space fillet reflex path testee characteristic.Then each receiving coil and its neighbouring magnetic susceptibility unit is more
A fillet magnetoreflection characteristics of channel inversion result is transferred to reflex path Fusion Module and is handled.
Step 8: the fusion of magnetoreflection access.By the multiple fillet magnetoreflection characteristics of channel and its spatial information of step 7 inverting,
It is merged in reflex path Fusion Module, obtains the space body transfer function of the detection object on array probe position,
And transmit the result to imaging display module.
Step 9: display and imaging.The magnetism of the space body transfer function binding object different materials obtained from above step
Parameter, electrical parameter characteristic map to reflex path characteristic function and its various variations, and mapping results are in man-machine interactive platform
It shows, and judges some angle internal feature of testee.
Step 10: the imaging of array probe moving sweep.Signal processing rear end controls the fortune of array probe by communication module
Dynamic or perception array probe motion conditions repeat step 5 to step 9, obtain array probe each azimuth scan image simultaneously
It is merged, obtains the three-dimensional imaging result of object, and obtain its multi-faceted internal feature information.
In addition, above-mentioned detection and imaging method based on wideband magnetic wave reflex path parameter identification, can before step 1,
Sample data acquisition is carried out to detection object sample；Detection data is stored in the memory of signal processing rear end, as detection
The reference frame of the judgement of object property and internal flaw identification in the process, to improve the speed of detection.The sample data of acquisition is answered
Master sample data including various materials, the data of basic configuration object master sample, the mark under various space distribution situations
The data etc. of the various defect classifications of the data and sample interior of quasi- sample, and form material, shape, spatial distribution, defect class
It Deng not feature databases.
In addition, above-mentioned detection and imaging method based on wideband magnetic wave reflex path parameter identification, is not influencing measured object
Under the premise of use, magnetic conductance object (such as: iron powder) can be added inside measured object before detection to increase magnetic wave reflected intensity.
A kind of detection based on wideband magnetic wave reflex path parameter identification and imaging method and device proposed by the invention,
It is empty using the transmission function and its various change inverting of information system using wideband magnetic wave as information carrier in conjunction with Theory of Electromagnetic Field
Between testee various characteristic parameters and imaging, have the advantage that
(1) present invention passes through the parameter identification to the transmission function of magnetoreflection access locating for measured object using magnetic wave as carrier
As a result three-dimensional imaging is carried out, and then the features such as the material of measured object, spatial distribution are identified, realizes non-destructive testing.
(2) using magnetic wave as detection information carrier non-contact detection may be implemented, relative to ultrasound detection in the present invention
Technology does not need couplant, is applicable to the detection of high temperature, complex structure；Magnetostatic wave signal is fast in space attenuation simultaneously, phase
For detection techniques such as X-ray, nuclear magnetic resonance, have the advantages that space loss is small, and harmless to humans.
(3) present invention uses broadband signal that can increase information content according to Shannon information theory for transmitting signal, relative to existing
Some is the Detection Techniques for emitting signal with pulse signal, can greatly improve detection accuracy and imaging definition.
(4) present invention is using hot-wire coil as the transmitting unit of magnetostatic wave signal, relative to radar, situation that can be small in bore
Lower transmitting low frequency signal, device have the characteristics that small in size, at low cost.
(5) present invention can be using supersonic range magnetic signal as carrier signal, relative to magnetic resonance detection technology, hair
The power and frequency for penetrating signal are greatly decreased, no radio frequency thermal effect and noiseless, harmless to organism, are suitble to online for a long time
Detection.
(6) split type structure can be used in the present invention, detects front end and signal processing rear end and passes through wired or be wirelessly connected,
Signal processing rear end can be realized by high-performance computer or network processes terminal.It, can relative to existing image-forming detecting system
The volume of fore device is reduced, realizes portable inspectiont, and can guarantee and even improve detection accuracy.It is applicable to be distributed on a large scale
The applications such as formula detection, on-line checking, mobile detection, long-range detection.
(7) signal processing rear end of the invention has feature database abundant, it can be achieved that automatic identification, therefore to testing staff
Requirement reduce, it is simple to operate, and can after detection process be complete examining report, improve the efficiency of detection.
Detailed description of the invention
Fig. 1 is system block diagram of the invention；
Fig. 2 is the detection schematic diagram of the invention based on wideband magnetic wave reflex path parameter identification；
Fig. 3 is B-H loop and its linear region；
Fig. 4 is the floor map of array probe of the invention；
Fig. 5 is the diagrammatic cross-section of the transmitting coil of array probe of the invention；
Fig. 6 is work flow diagram of the invention.
Specific embodiment
Explanation that present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention
It is without being limited thereto.
Embodiment
The present invention organically combines information theory and Computational electromagnetics, is carried using wideband magnetostatic wave signal as information
Body, with the transmission function and its various change of information system, in conjunction with the magnetism and electrical parameter feature of Maxwell equation and material,
By the parameter identification to magnetoreflection access, non-destructive testing and three-dimensional imaging to testee are realized.The present invention has non-connect
Touch, precision is high, harmless to humans, environment loss is small, bore probe is small, small in size, low-power consumption, hardware are simple and at low cost etc. excellent
Point has extensively in fields such as the detection of underground water oil-gas pipeline, highway bridge detection, industry manufacture detection, biology and human testings
Application prospect.
By taking the detection of underground water oil-gas pipeline as an example, existing detection method includes: endoscope check method, X-ray check and thunder
Up to detection method.Wherein, camera is arranged in endoscope check method needs in pipeline, passes through wired or wireless transmission optical imagery
It is identified, detection speed is slow, and has certain damage to pipeline.X-ray check and detections of radar belong to noninvasive imaging detection method,
But X-ray check method needs radioactive source, is harmful to the human body, and is not suitable for a wide range of use, and it is slow to detect speed.Detections of radar can be realized
Lossless non-contact detecting, but the internal structure that metallics can generate electromagnetic shielding and can not spy upon testee is encountered, and adopt
Use pulsed electromagnetic wave as detection signal, timing accuracy is high, detection time is short, instantaneous power is high, and hardware dynamic range is big, and
Work is in radio frequency band, therefore hardware cost is high, expensive.It is needed to change not when furthermore detecting different depth underground piping
Same antenna is not suitable for universal use.In conclusion there are various problems for existing underground water oil-gas pipeline detection method, it is anxious
It needs to solve.
A kind of detection based on wideband magnetic wave reflex path parameter identification and imaging method and device of the invention
It can effectively solve the problems, such as this.The present invention, as detection signal, can be realized pair using wideband magnetostatic wave signal under the conditions of non-contacting
The non-destructive testing of underground unlike material pipeline, comprising: the nonmetallic materials such as PVC and metal material.It hereafter will be with ground down blow
For the jam detection of pipeline, illustrate a specific embodiment of the invention, is the blocking position for detecting underground blow-off line.
As shown in Figure 1, being a kind of detection and imaging based on wideband magnetic wave reflex path parameter identification of the present invention
The system block diagram of device.The device is mainly made of detection front end and signal processing rear end two large divisions, can be led between each other
It crosses wireless or wired is connected.
The major function of embodiment detection front end is the orthogonal magnetostatic wave signal of transmitting-receiving wideband, and frequency range exists: 20KHz-
Wherein specific signal launching centre frequency can comprehensively consider selection according to the depth and resolution requirement of detection to 25KHz(), phase
When in the sensor of whole device, mainly by communication module, detection signal generating module, array probe, reflection Signal Pretreatment
Module, moving sweep module, controller, memory and electric power generating composition.Wherein, communication module is responsible for signal processing rear end and inspection
The transmission surveyed between front end and control information, receive signal；Signal generating module is detected, the control generated according to signal processing rear end
Parameter information generates multi-channel wideband orthogonal electrical signal；Array probe, for underground piping, pipeline, defect and the inspection of blocking
Position is measured, the excitation for the electric signal that wherein transmitting coil is generated by detection signal generating module emits magnetostatic wave signal, receives line
Circle and magneto sensor receive magnetic wave and reflect signal；Signal pre-processing module is reflected, the calibration of signal is penetrated for docking transmitting-receiving, is located in advance
Reason etc.；Moving sweep module is responsible for controlling or perceiving the movement of array probe；Controller is responsible for controlling the work of each functional module
Make；Memory is used to cache the data of each functional module；Power supply is responsible for the power supply to modules, device.
The major function of the embodiment signal processing rear end is to carry out magnetoreflection to the magnetoreflection signal of detection front end receiver
Access parameter identification, inverting, fusion and imaging reality, can be a computer or network processes cloud terminal, by communication mould
Block, magnetoreflection characteristics of channel inverting module, reflex path Fusion Module, imaging display module, human-computer interaction module, processor,
Memory and power supply composition.Wherein, communication module is responsible for being communicated with detection front end, sends control information and receiving array is visited
Received reflection signal；Magnetoreflection characteristics of channel inverting module is responsible for the analytic solution of the magnetic channel in single fillet space
Carry out parameter identification and inverting；The multiple fillet space magnetoreflection accesses of reflex path Fusion Module complex fusion；Imaging display mould
Block carries out catoptric imaging to Three-Dimensional Magnetic reflex path characteristic and shows；Human-computer interaction module is inputted and is examined for external control information
The output processing for surveying result, realizes human-computer interaction；Processor is responsible for handling the data of each functional module；Memory is for caching
The data of each functional module；Power supply is responsible for the power supply to modules, device.
The data handling procedure of the embodiment is as follows: signal processing rear end passes through communication module, the battle array of control detection front end
Column probe transmitting-receiving magnetostatic wave signal, the received reflection magnetostatic wave signal of array probe first pass through reflection signal pre-processing module and are located in advance
Reason, then signal processing rear end is sent back by communication module, magnetic wave reflects the magnetoreflection access that signal passes through signal processing rear end
The processing of characteristic inverting module, reflex path Fusion Model and image-forming module, imaging are shown in display equipment.In addition at signal
There is human-computer interaction module in reason rear end, and the setting of the control parameter information of detection may be implemented, control the setting and output of information
As a result output setting etc..
In addition, the reflection signal processing mode of device includes two kinds: off-line data collecting and in real time processing.Wherein offline number
According to acquisition in the case where communication environment is severe, front end is detected according to preset parameter, controls the transmitting-receiving of magnetostatic wave signal, and
Transmitting signal will be received to be stored in the memory of detection front end, until sent out when communication condition improves by communication module
It is mapped to signal processing back-end processing；Detection when processing is for real-time detection underground blow-off line in real time receives the place of reflection signal
Reason is shown with imaging.
The present invention is based on the detection of wideband magnetic wave reflex path parameter identification signal is as shown in Figure 2.The array of the present embodiment
For probe placement in the upper surface of underground blow-off line to be detected, array probe contains the transmitting coil of array arrangement, array arrangement
Receiving coil and the magneto sensor that is distributed in around coil.Emission current Is (t) flows through transmitting coil excitation-emission magnetic wave letter
Number, magnetic wave is received after the reflection of underground blow-off line by different receiving coils and magneto sensor, generates induced electromotive force, induction
The information such as electric current Ir (t), induced impedance.In addition permanent magnet is placed at transmitting coil back, and magnetic field is pushed outward, to increase detection
Depth.
According to the Ampere theorem of Maxwell equation, the electric field of variation generates magnetic field, and magnetic field generates magnetic flux in certain curved surface,
Magnetic flux, that is, magnetic induction intensity of unit area.Wherein, the magnetic induction intensity of magnetic material and the relationship of magnetic field strength are non-thread
Property, commonly using B-H loop in terms of technical application is described magnetic history, specific visible Fig. 3, two in partial region
Person has linear relationship.Magnetic induction intensity is with close phases such as the spatial parameter of measured object, the magnetic parameter of material, electrical parameters simultaneously
It closes.Theorem is incuded by faraday again, changing magnetic field can induced electric field, generation induced electromotive force, size and magnetic flux clock synchronization
Between change rate it is directly proportional.Therefore, according to the electric current of transmitting coil and reflection magnetic signal receiving coil, magneto sensor etc. sense
The information such as raw induced electromotive force, induced current, induced impedance can estimate the characteristic of testee.Whole system can be with
Regarding one as with magnetic wave is the Transmission system for being wirelessly transferred carrier, and the path of transmission can be regarded as a reflex path magnetic letter
Road.If suitably controlling the electric current and its physique of transmitting coil, field bit can be made in the linear portion of B-H loop
Point, whole system works in linear region, is equivalent to the FIR filter of high-order, can indicate that the magnetic is believed with linear transfer function
The characteristic in road.Therefore by analyzing the transmission function and its various change form of the reflex path magnetic channel, its each seed ginseng is recognized
Number, obtains the information such as material, the spatial distribution of testee, and can according to the situation of change of some or multiple parameters with two dimension or
Three-dimensional Display imaging.According to the inversion principle of principles above and combination reflex path magnetic channel transfer functions, the present invention proposes one
Detection and imaging method of the kind based on wideband magnetic wave reflex path parameter identification.Magnetic conductivity, dielectric constant of different materials etc. are
It is different, there is anisotropy, therefore the magnetic resistance that different materials are presented in same magnetic field is different.Therefore, in same magnetic field
In, probe will be converted into electric signal by the magnetic signal of magnetic wave reflex path by receiving coil and various magneto sensors, according to
Transmitting signal and reception signal can be finally inversed by the reflex path magnetic channel transfer characteristic in the fillet space where the probe, this biography
Delivery function is with time, space etc. for parameter.By modes such as linear transducer array or moving sweeps, to the fillet space of single probe
The transmission function of inverting realizes three-dimensional fusion, an available face transmission function or body transmission function, and according to reflex path
The characteristic of channel carry out aerial image, imaging results reflect shape, material, structure, spatial distribution and its movement of measured object
Situation etc..
As shown in figure 4, being the floor map of array probe of the present invention.Array probe is by multiple wire coils and magnetic
Quick element composition, wherein wire coil is arranged in array composition, various magneto sensor (Hall elements, magnetic resistance in a manner
Element, magnetostriction element, magnetodiode, magnetic sensitive transistor etc.) it is placed between coil.Each coil can according to need
It is set as transmitting, receives both of which.At least one coil is detected every time and is set as emission mode, is responsible for transmitting detection magnetic wave
Signal.Magneto sensor and the coil for being set as reception pattern are responsible for receiving magnetic wave reflection signal.
Meanwhile the test object of the implementation case is buried target, in order to increase effective detection depth of magnetic wave as far as possible
And spiral structure can be used in detection accuracy, transmitting coil described in Fig. 4, sectional view is as shown in Figure 5.Transmitting coil is sky
Wire-core coil, winding method are successively decreased spiral structure using the number of turns.The structure has magnetic focusing effect, so that magnetic field is as poly- as possible
Coke is on a point, to improve the precision of detection.The less side of the number of turns of coil is the front of coil, for emitting magnetic
Wave.The more side of coil turn be the back side, place permanent magnet, its role is to magnetic field DC component is provided and by magnetic field it is past
Outer push, and the alternating current offer magnetic field AC compounent that coil is logical.Since permanent magnet is passive, therefore can be in system total power
Effective detection depth of array probe is improved on the basis of not increased.
The present invention realizes a kind of detection based on wideband magnetic wave reflex path parameter identification and imaging method, work simultaneously
Flow chart such as Fig. 6, comprising the following steps:
Step 1: the setting of detection device control parameter.In detection process, testing staff passes through device signal processing rear end
Interpersonal interactive peripheral hardware, is arranged the control parameter of device.The control parameter for needing to be arranged includes:
(1) emission parameter is arranged, comprising: array probe transmitting coil Unit selection, transmitting driving method selection, transmitting
Signal waveform, signal strength, launching centre frequency, transmitted bandwidth, the initial phase of launch angle and transmitting signal.
(2) parameter setting is received, comprising: array probe receiving coil Unit selection receives signal bandwidth, receives frequency
Deviant, receiving angle, sample frequency, sampled point number, receiving window size, receiving time size, magnetic wave are being tested in advance
Pre-set velocity in object medium.
(3) selection with location parameter, the parameter setting of communication module, comprising: the connection type and network of communication are communicated
Address, the location parameter of array probe and the setting of moving sweep mode.
(4) testing result display parameters are arranged, comprising: display pattern (including three-dimensional stereo model, two dimensional image or one
Dimension wave form is shown), reference axis displaing coordinate and range, image display contrast, contrast size；If detection process is adopted
It is 3-D scanning mode, there is provision of the location parameter of every survey line of detection, including the interval between survey line, starting point
Position, scanning shift, transverse and longitudinal direction survey line selection etc..
Step 2: appliance arrangement state-detection.Step state detected includes: detection front end and signal processing rear end
Connection status detects the connection status of front end modules, the connection status of each device in signal processing rear end, the power supply of device
Capacity status.Wherein only in the case where above-mentioned apparatus equipment state is normal operation, the behaviour of next step can be carried out
Make；If any equipment failure error condition, then error message is prompted in man-machine interactive platform, and terminate current detection workflow
Journey.
Step 3: the gain calibration before detection.The gain calibration mode that wherein can choose includes following two: being increased manually
Benefit and automatic gain；If manual gain calibrating mode is selected, by testing staff according to spies such as the structures of measured object and property
Property the various gain parameters of setting；If selecting automatic gain calibration mode, after obtaining certain sample in measured object, signal
Automatically the various gain parameters of the characteristics such as measured object structure and property are estimated in processing rear end；Wherein gain parameter includes magnetic wave each
Various magnetic parameters, electrical parameter in kind dielectric material etc., the gain size of various time points, bandpass filtering frequency bandwidth are right
Than degree size.
Step 4: device detects initial calibration.The transmission signal parameters information according to set by step 1, signal processing rear end
Control parameter information is generated, and generates multi-channel wideband via the detection signal generating module that communication module is transferred to detection front end
Orthogonal electrical signal, each transmitting coil of array probe by electric signal excitation, to no detectable substance spatial emission magnetostatic wave signal.Battle array
The magneto-dependent sensor of each receiving coil and coil peripherals that arrange probe receives magnetic wave and reflects signal, while magnetic wave is reflected signal
It is transferred to reflection signal pre-processing module.Signal pre-processing module is reflected to sense the magnetosensitive of each receiving coil and coil peripherals
The magnetic wave reflection signal and its parameter attribute that device receives store, and are recorded as the initial calibration data of device.This step
Effect when being to be recorded in no measured object, array probe is by between wire coil and between wire coil and magneto sensor
The parameter information of the reflection signal of magnetic wave caused by mutual inductance and self inductance effect etc..Then whether judgment means need power cut-off,
END instruction is such as received, then terminates current detection workflow；Otherwise continue the operation of next step.
Step 5: transmitting magnetostatic wave signal.After it experienced step 4, array probe is directed at object to be detected, while root
According to the coil state parameter of transmission signal parameters information, array probe set by step 1, the coil hair that setting state is transmitting
The parameter of signal is penetrated, signal processing rear end generates control parameter information, and the detection of detection front end is transferred to via communication module
Signal generating module generates multi-channel wideband orthogonal electrical signal, and each transmitting coil of array probe is motivated by electric signal, to quilt
Survey object emission magnetostatic wave signal.
Step 6: receiving magnetic wave and reflect signal.The reception parameter information according to set by step 1, each of array probe connect
The magneto sensor of take-up circle and coil peripherals receives magnetic wave and reflects signal, and is transferred to reflection signal pre-processing module, and with step
The rapid 4 device initial calibration datas recorded are handled together, to remove array probe in no measured object, by between wire coil
And the magnetic wave of the generation of the mutual inductance between wire coil and magneto sensor and self inductance effect etc. reflects signal, obtains measured object institute
The amendment reflection signal of each receiving coil and magneto-dependent sensor that generate is transferred to signal processing rear end by communication module
Magnetoreflection characteristics of channel inverting module.
Step 7: magnetoreflection access inverting.According to the information for the transmitting detection signal that step 1 configures, step 6 is received to be repaired
The information of positive reflection signal, magnetoreflection characteristics of channel inverting module are finally inversed by the transmission function and its various transformation of magnetoreflection access
Form (such as: time domain transformation, frequency-domain transform).Again according to described above, from electric field Induced magnetic field, testee is passed through in magnetic field,
Changing magnetic field induced electric field, spatial distribution, internal structure, material properties of testee etc. can have in transmission function
Reflected, it, can inverting according to the characteristic of the magnetic parameter (such as: magnetic conductivity) of material, electrical parameter (such as: dielectric constant, conductivity)
Out on the space fillet reflex path testee characteristic.Then judge each receiving coil and its neighbouring magnetosensitive unit
Whether the inverting of multiple fillet magnetoreflection accesses is completed, if not yet completed, continues to repeat step 5 to step 7；If inverting
It completes, then will carry out next step operation.
Step 8: the fusion of magnetoreflection access.By step 7 recognize and multiple fillet magnetoreflection access parameter attributes of inverting and
Its spatial information is merged by reflex path Fusion Module, obtains the sky of the detection object on array probe position
Mesosome transfer function, and transmit the result to imaging display module.
Step 9: display and imaging.The space body transfer function obtained from above step, according to its amplitude, phase, delay
Etc. information, the magnetic parameter of binding object different materials, electrical parameter characteristic map to transfer function and its various variations,
Mapping results are shown in man-machine interactive platform, and judge some angle internal feature of testee.Then according to display
The result of imaging judges whether array probe needs moving sweep to change the angle of detection to know other of testee
The characteristic information of angle then carries out next step operation if necessary to moving sweep, if you do not need to moving sweep, then terminate to work as
Preceding detection workflow.
Step 10: the imaging of array probe moving sweep.Signal processing rear end controls or perceives array by communication module and visits
The movement of head, repeats step 5 to step 9, obtains array probe in the image of each azimuth scan and merged, obtain object
Multiplanar imaging result, and obtain its multi-faceted internal feature information.
In addition, above-mentioned detection and imaging method based on wideband magnetic wave reflex path parameter identification, can before step 1,
Sample data acquisition is carried out to detection object sample；Detection data is stored in the memory of signal processing rear end, as detection
The reference frame of the judgement of object property and internal flaw identification in the process, to improve the speed of detection.The sample data of acquisition is answered
Master sample data including various materials, the data of basic configuration object master sample, the mark under various space distribution situations
The data etc. of the various defect classifications of the data and sample interior of quasi- sample, and form material, shape, spatial distribution, defect class
It Deng not feature databases.
For the present embodiment, due to causing the object of underground bowl sewage draining pipeline blockage that there is diversity, according to the method described above at
Internal imaging as blow-off line can be achieved, but the target identification of some blocking positions may be not obvious enough.Therefore, before detection
The magnetic conductance powder of iron powder etc can be added to enhance magnetic wave reflected intensity in sewage pipe.Due to the original of blowdown in-pipe flow
Cause, the position iron powder not blocked do not have more precipitating, are distributed relatively uniform；And in blocking position, due to sluggish flow
Iron powder can largely precipitate, and can see apparent reflecting region when display is imaged, can quickly locate the position of blocking
Degree and ingredient, the spatial distribution of tamper etc. set, and can clearly show internal blocking.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included in protection scope of the present invention.
Claims (6)
1. detection and imaging device based on wideband magnetic wave reflex path parameter identification, it is characterised in that believe by carrier of magnetic wave
Breath, reflects path experienced for magnetic wave and regards a reflex path magnetic channel as, find out magnetic wave reflex path using receiving and transmitting signal
Transmission function and its various variations, magnetism, electrical parameter feature in conjunction with different materials be finally inversed by the material of testee
Matter, spatial characteristics, and the magnetic wave reflex path transmission function of different spatial is merged, quickly, efficiently, accurately
Realize the three dimensional lossless detection and imaging of object in ground；
Including detecting front end, signal processing rear end, the two passes through wireless or wired connection；Wherein, detection is responsible in detection front end
The generation of signal, the transmitting of magnetostatic wave signal and magnetic wave reflect the reception of signal；It is responsible for the control of whole device in signal processing rear end
The inverting, fusion and imaging display of magnetoreflection access are realized in the generation of parameter information, the processing for receiving signal；
The detection front end of above-mentioned detection and imaging device based on wideband magnetic wave reflex path parameter identification is the biography of described device
Sensor, specifically by communication module, detection signal generating module, array probe, reflection signal pre-processing module, moving sweep mould
Block, controller, memory and power supply composition；Wherein communication module for realizing detection front end and signal processing rear end communication,
The control parameter information that signal processing rear end generates is transferred to the detection signal generating module of detection front end, array probe is connect
Receive through reflection signal pre-processing module processing reflection magnetic signals give signal processing rear end, comprising signal transmitting and receiving unit,
Data transmission interface unit, is carried out data transmission by the way of wired or wireless；Detecting signal generating module will be from communication mould
The control parameter information that block obtains generates the controllable orthogonal telecommunications of multi-channel wideband of power, centre frequency, phase, bandwidth parameter
It include D/A conversion unit, phase control unit, power amplification unit, filter unit, feeding network number to motivate array probe
Unit；The wideband orthogonal electrical signal that array probe will test signal generating module generation is converted into magnetic signal and emits to testee
And magnetic wave reflection signal is received, it is made of multiple wire coils and magneto sensor, wherein wire coil is arranged in array composition, line
Circle center places different materials according to application demand, includes at least one of air, magnetic material, and according to test object
Actual conditions select winding method；Various magneto sensors are Hall element or magnetoresistive element or magnetostriction element or magnetosensitive two
One of pole pipe or magnetic sensitive transistor are placed between coil, and each coil is set as needed to emit, receive two kinds of moulds
Formula, every time detection during, at least one coil is set as emission mode, be responsible for transmitting detection magnetostatic wave signal, magneto sensor and
The coil for being set as reception pattern is responsible for receiving transmitting magnetostatic wave signal；Reflection signal pre-processing module receives array probe
Various types of magnetic waves reflection signals carry out denoisings, go mutual inductance between coil unless each and between coil and magneto sensor with
Self inductance effect pretreatment, signal processing rear end is then sent to by communication module, include filter unit, low noise amplifying unit,
AD conversion unit；Motion-control module is responsible for controlling and perceiving the movement of array probe, unit containing motion motor, GPS positioning
Unit；Controller is responsible for controlling the work of each functional module；Memory is used to cache the data of each functional module；Power supply is negative
Blame the power supply to modules, device；
The computer of signal processing rear end one of above-mentioned detection and imaging device based on wideband magnetic wave reflex path parameter identification
Or network cloud processing terminal, it is the data processing terminal of described device, specifically by communication module, magnetoreflection characteristics of channel inverting
Module, reflex path Fusion Module, imaging display module, human-computer interaction module, processor, memory and power supply composition；Wherein,
Communication module reflects signal with the magnetic wave for detecting the communication of front end, and will test front-end detection for realizing signal processing rear end and passes
It is defeated to arrive magnetoreflection characteristics of channel inverting module, it include signal transmitting and receiving unit, data transmission interface unit, using wired or wireless
Mode carries out data transmission；Magnetoreflection characteristics of channel inverting module is a computer software module, and its role is to single
The analytic solution and its parameter attribute of the magnetoreflection access in fillet space carry out identification and inverting, and pass the result to anti-
Penetrate access Fusion Module；Reflex path Fusion Module is a computer software module, and its role is to by each of array probe
The magnetoreflection access in a fillet space carries out multidimensional fusion, obtains the inner parameter characteristic of testee, and fusion results are passed
It is defeated to arrive imaging display module；Two dimension, Three-Dimensional Magnetic reflex path characteristic of the display module to array probe and its moving sweep is imaged
It is imaged and is shown, show software unit, display unit comprising computer generated image；Human-computer interaction module provides human-computer interaction
Interface and peripheral hardware；Processor is responsible for handling the data of each functional module；Memory is used to cache the data of each functional module；
Power supply is responsible for the power supply to modules, device.
2. the detection and imaging device according to claim 1 based on wideband magnetic wave reflex path parameter identification, feature
It is to detect the sensor that front end is described device, signal processing rear end is responsible for the control parameter setting of whole device, receives letter
Number processing and imaging show；Detection front end is separated with signal processing rear end, is connected by the way of wirelessly or non-wirelessly, can be
The software processing capability of lifting device on the basis of miniaturization, portability, improves detection accuracy.
3. the detection and imaging device according to claim 1 based on wideband magnetic wave reflex path parameter identification, feature
The array probe for being the detection front end is the transmitting and receiving device for detecting signal, by multiple special according to application needs
The coil and magneto sensor of coiling rearrange；The coil is set as transmitting, receives two states；Increasing the effective of magnetic wave
The application of depth and detection accuracy is detected, transmitting coil uses such as flowering structure: for air core coil, winding method uses coil
The number of turns is successively decreased spiral structure, is generated magnetic focusing effect, is made focusing on a point for magnetic field, to improve the precision of detection；
The less side of the number of turns of coil is the front of coil, for emitting magnetic wave；The more side of coil turn is the back side, is put
Permanent magnet is set, its role is to provide magnetic field DC component and push in magnetic field outward, and the alternating current offer magnetic that coil is logical
Field AC compounent, the structure improve effective detection depth of array probe on the basis of system total power is not increased.
4. detection and imaging method based on wideband magnetic wave reflex path parameter identification, it is characterised in that the magnetic wave reflex path
The target detection principle of parameter identification is: the array probe for detecting front end is responsible for the transmitting of wideband quadrature detection magnetostatic wave signal and is connect
Receive, magnetic wave regards a magnetic channel as from reflection receivable path experienced is emitted to, according to Maxwell equation, characteristic with
The material of testee, spatial distributed parameters are related；The transmission function of reflex path is obtained by receiving and transmitting signal, is finally inversed by fillet
The material and spatial distribution characteristic of the testee in space；Different spatial is obtained by array or moving sweep mode
The parameter attribute of magnetoreflection access is merged the two dimension for obtaining object, three-dimensional space distribution situation, realizes interior of articles material
Expect recognition detection and imaging.
5. the detection and imaging method according to claim 4 based on wideband magnetic wave reflex path parameter identification, feature
It is under the premise of not influencing measured object use, it is anti-to increase magnetic wave that magnetic conductance object is added inside measured object before detection
Penetrate intensity.
6. the detection and imaging method according to claim 5 based on wideband magnetic wave reflex path parameter identification, feature
It is to include the following steps:
Step 1: device control parameters setting: testing staff passes through the human-computer interaction peripheral hardware of device signal processing rear end, setting dress
The control parameter set；The control parameter of setting includes: transmission signal parameters；Communication module parameter；The coil state of array probe
Parameter, including emission state and reception state, and it is set as the transmission signal parameters of the coil of emission state；Receive parameter；Magnetic
Channel transfer characteristic inverting module parameter；Channel Fusion Module parameter；Display module parameter is imaged；
Step 2: appliance arrangement state detects automatically: step state detected includes: detection front end and signal processing rear end
Communication module connection status, the connection status of modules, modules inside signal processing rear end inside detection front end
Connection status；
Step 3: the gain calibration before detection: wherein gain calibration mode includes two kinds: manual gain and automatic gain；Increase manually
Various gain parameters are arranged according to the structure and properties of measured object by testing staff in beneficial calibrating mode；Automatic gain calibration side
Formula is then after obtaining certain sample in measured object, and the various of measured object structure and properties are estimated in signal processing rear end automatically
Gain parameter；Wherein gain parameter includes various magnetic parameters, electrical parameter of the magnetic wave in various dielectric materials, various time points
Gain size, bandpass filtering frequency bandwidth, contrast size；
Step 4: device detects initial calibration: the transmission signal parameters information according to set by step 1, and signal processing rear end generates
Control parameter information, and it is orthogonal via the detection signal generating module generation multi-channel wideband that communication module is transferred to detection front end
Electric signal, each transmitting coil of array probe by electric signal excitation, to no detection object spatial emission magnetostatic wave signal；Array
Each receiving coil of probe and the magneto-dependent sensor of coil peripherals receive magnetic wave and reflect signal, while magnetic wave reflection signal being passed
It is defeated to arrive reflection signal pre-processing module；Signal pre-processing module is reflected by each receiving coil and the magneto-dependent sensor of coil peripherals
The magnetic wave reflection signal and its parameter attribute received stores, and is recorded as the initial calibration data of device；This step
When effect is to be recorded in no measured object, array probe is by mutual between wire coil and between wire coil and magneto sensor
The parameter information of sense and the reflection signal of magnetic wave caused by self inductance effect；
Step 5: transmitting magnetostatic wave signal: after it experienced step 4, array probe being directed at object to be detected, while according to step
The coil state parameter of transmission signal parameters information, array probe set by rapid 1, the coil transmissions letter that setting state is transmitting
Number parameter, signal processing rear end generate control parameter information, and via communication module be transferred to detection front end detection signal
Module occurs and generates multi-channel wideband orthogonal electrical signal, each transmitting coil of array probe by electric signal excitation, to tested
Object emission magnetostatic wave signal；
Step 6: receiving magnetic wave and reflect signal: the reception parameter information according to set by step 1, each reception line of array probe
The magneto sensor of circle and coil peripherals receives magnetic wave and reflects signal, and is transferred to reflection signal pre-processing module, and with step 4 institute
The device initial calibration data of record is handled together, to remove array probe in no measured object, by between wire coil and
Magnetic wave caused by mutual inductance and self inductance effect between wire coil and magneto sensor reflects signal, obtains caused by measured object
Signal is reflected in the amendment of each receiving coil and magneto-dependent sensor, and by communication module, the magnetic for being transferred to signal processing rear end is anti-
Penetrate characteristics of channel inverting module；
Step 7: magnetoreflection access inverting: according to the information for the transmitting detection signal that step 1 configures, the received amendment of step 6 is anti-
The information of signal is penetrated, magnetoreflection characteristics of channel inverting module is finally inversed by the transmission function and its various transformation shapes of magnetoreflection access
Formula；Again according to described above, from electric field Induced magnetic field, testee, changing magnetic field induced electric field, testee are passed through in magnetic field
Spatial distribution, internal structure, material properties reflected in transmission function, according to the magnetic parameter of material, electrical parameter
Characteristic, be finally inversed by the characteristic of testee on the space fillet reflex path；Then each receiving coil and its neighbouring magnetic
Multiple fillet magnetoreflection characteristics of channel inversion results of sensing unit are transferred to reflex path Fusion Module and are handled；
Step 8: magnetoreflection access fusion: by the multiple fillet magnetoreflection characteristics of channel and its spatial information of step 7 inverting, anti-
It penetrates access Fusion Module to be merged, obtains the space body transfer function of the detection object on array probe position, and will
As a result it is transferred to imaging display module；
Step 9: display and imaging: the magnetic ginseng of the space body transfer function binding object different materials obtained from above step
Number, electrical parameter characteristic map to reflex path characteristic function and its various variations, and mapping results are aobvious in man-machine interactive platform
It shows and, and judge the internal feature of the different angle of testee；
Step 10: array probe moving sweep imaging, signal processing rear end by communication module control array probe movement or
The motion conditions for perceiving array probe, repeat step 5 to step 9, obtain array probe in the image of each azimuth scan and progress
Fusion, obtains the three-dimensional imaging result of object, and obtain its multi-faceted internal feature information；
In addition, above-mentioned detection and imaging method based on wideband magnetic wave reflex path parameter identification, before step 1, to detection
Object sample carries out sample data acquisition；Detection data is stored in the memory of signal processing rear end, as in detection process
The reference frame of the judgement of object property and internal flaw identification, to improve the speed of detection；The sample data of acquisition should include each
The master sample data of kind of material, the data of basic configuration object master sample, the master sample under various space distribution situations
Data and the various defect classifications of sample interior data, and form material, shape, spatial distribution, defect category feature library.
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| CN105167771B (en) * | 2015-09-23 | 2018-03-27 | 广州丰谱信息技术有限公司 | Bone tissue non-invasive detection methods and device based on dynamic magnetic pumping ionic spectrum |
| CN105527338A (en) * | 2015-10-26 | 2016-04-27 | 华南理工大学 | Metal wire rope on-line monitoring method and device |
| CN106918314B (en) * | 2015-12-27 | 2019-08-13 | 神讯电脑(昆山)有限公司 | The detection system and its detection method of object features information |
| TWI585435B (en) | 2016-07-22 | 2017-06-01 | 緯創資通股份有限公司 | Human body positioning method, human body positioning system, and positioning server |
| CN107290653B (en) * | 2017-05-13 | 2023-04-21 | 华南理工大学 | Detection device and method for identifying PCB based on broadband magnetic induction channel characteristics |
| CN108956647A (en) * | 2017-05-27 | 2018-12-07 | 富士通株式会社 | Article detection method and device |
| CN107995712A (en) * | 2017-12-08 | 2018-05-04 | 北京弗圣威尔科技有限公司 | Wireless power heating unit and heating means and placement thing and its preparation method |
| CN109882741A (en) * | 2019-03-15 | 2019-06-14 | 湘潭大学 | A kind of blockage of sewer detection method |
| CN111351845A (en) * | 2020-03-18 | 2020-06-30 | 南京理工大学 | Intelligent detection device based on pulse eddy current |
| CN111578785A (en) * | 2020-04-30 | 2020-08-25 | 南京理工大学 | Multi-mode detection device and method based on composite magnetoelectric sensor |
| CN112763543B (en) * | 2020-12-29 | 2021-08-03 | 电子科技大学 | Object defect detection method and system based on active electric field |
| CN113514832A (en) * | 2021-07-28 | 2021-10-19 | 吉林大学 | Metal flaw detection device and method based on millimeter wave radar SAR imaging |
| CN113686772A (en) * | 2021-09-13 | 2021-11-23 | 国机传感科技有限公司 | Comprehensive external detection device for buried steel long oil and gas pipeline |
| CN114166930B (en) * | 2021-12-07 | 2024-03-01 | 威海华菱光电股份有限公司 | Wirecord fabric detection and calibration device and detection and calibration method |
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