CN104655714A - Detecting and imaging method and detecting and imaging device based on broadband magnetic wave reflection path parameter identification - Google Patents
Detecting and imaging method and detecting and imaging device based on broadband magnetic wave reflection path parameter identification Download PDFInfo
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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
The present invention relates to the field such as infotech, Non-Destructive Testing, be specifically related to a kind ofly to can be applicable to that underground water oil and gas pipes detects, highway bridge detects, industry manufacture is detected, the defect target identification of biological and human detection etc., the detection based on wideband magnetic wave reflex path parameter identification of imaging and formation method and device.
Background technology
Detection refers to and utilizes various physical chemistry effect, select applicable mode and device, qualitative and analysis is accurately carried out to the attribute, structure, defect etc. of each type objects, can be used for improving production quality, product design, processing and manufacturing, the reliability of finished product detection and military service equipment and safety analysis, also can be used for clinical diagnosis, play a significant role in social construction and economic development.Detection technique is mainly two large classes: Non-Destructive Testing and damage detection.Wherein damage detection and namely have injury to testee, modern technologies are developing to Non-Destructive Testing.
Non-Destructive Testing refers to and is not damaging or do not affecting by measured object usability; do not injure by under the prerequisite of measured object interior tissue; the change of the heat utilizing the exception of material internal structure or defect to exist to cause, sound, optical, electrical, magnetic etc., by the method that correlation technique and equipment detect the structure of object, character, shape, position, distribution and change thereof and test.Existing lossless detection method is a lot, and what can reach imaging effect in actual applications mainly contains following 4 kinds: X-ray check technology, ultrasonic detection technology, Microwave Detecting Technology and magnetic resonance detection technology.Sum up above 4 kinds of technology and equipment, mainly there is following problem:
1) X-ray check adopts X ray signal (frequency range: 30 PHz to 30EHz) as information carrier, needs higher cost and X ray exists radioactivity, to human body, bad environmental, and volume greatly, involve great expense, be thus not suitable for using on a large scale.
2) ultrasound examination is by ultrasonic signal (frequency range: more than 20KHz) as information carrier, has highly sensitive, harmless, low cost and other advantages, but needs to be close to object table and couplant, be not suitable for the detection of complex structure.
3) Radar Technology adopts microwave signal (frequency range: 300MHz-300GHz) as information carrier, utilize electromagnetic Far Field Scattering, reflection be embodied as picture, have that imaging precision is high, body harmless, the advantage such as contactless, but run into metallics and can produce electromagnetic screen and the internal structure that testee cannot be spied upon.Radar Technology adopts pulsed electromagnetic wave as detection signal simultaneously, and timing accuracy is high, detection time is short, instantaneous power is high, and hardware dynamic scope is large, and works in radio-frequency range, and therefore hardware cost is high, expensive.4) testee is placed in powerful bias magnetic field by magnetic resonance detection, irradiate with electromagnetic wave (frequency range 400MHz-800MHz), to change the rotary rowed column direction of hydrogen atom, make it resonance, then the electromagnetic wave of its release is analyzed thus the three-dimensional imaging of acquisition interior of articles, there is imaging precision high, to advantages such as human body radiation damage frees, but be not suitable for the situation that there is ferromagnetic material (as: metal) testee inside, simultaneously due to radio frequency thermal effect, producing very noisy etc. makes it be not suitable for long-time detection, and volume is large, expensive, and need special work-yard and environment.
But according to electromagnetic theory, electromagnetic essence mutually transforms in space and periodically variable Electric and magnetic fields, is the general name of electric wave and magnetic wave.According to Maxwell equation, the electric charge of motion or the change of electric field can produce magnetic field and magnetic wave, and detected material can affect distribution and the intensity in magnetic field due to the difference of material, space distribution, can be used for Non-Destructive Testing and imaging applications.In view of this, the present invention proposes a kind of detection based on wideband magnetic wave reflex path parameter identification and formation method and device, relative to existing Non-Destructive Testing and imaging system, with wideband magnetic wave for information carrier, adopt hot-wire coil can realize the small-bore transmitting of low frequency signal (such as: 20KHz-25KHz) as magnetic wave transmitter unit; Therefore the present invention have contactless, precision is high, harmless to people, environment loss is little, bore probe is little, volume is little, low-power consumption, hardware are simple and low cost and other advantages, be applicable to the application scenario such as Distributed Detection, on-line checkingi, movable type detection, remote detection, manufacture the fields such as detection, biology and human detection have wide practical use in the detection of underground water oil and gas pipes, highway bridge detection, industry.
Summary of the invention
The object of the invention is the many deficiencies overcoming existing nondestructive detection system, information theory, Computational electromagnetics is organically combined, and propose a kind of detection based on wideband magnetic wave reflex path parameter identification and formation method and device, concrete principle is as follows:
According to the Ampere theorem of Maxwell equation, the electric field of change produces magnetic field, and magnetic field produces magnetic flux at certain curved surface, the magnetic flux of unit area and magnetic induction density.Wherein, the magnetic induction density of magnetic material and the available B-H loop of the relation in magnetic field represent, this curve is linear change in subregion.Magnetic induction density follows the magnetic parameter, electrical quantity etc. of the spatial parameter of measured object, material closely related simultaneously.Respond to theorem by faraday again, the magnetic field of change can induced electric field, and produce induction electromotive force, its size is directly proportional to the rate of change of magnetic flux to the time.Therefore, produce the information such as induction electromotive force, induction current, induced impedance according to the electric current of transmitting coil and the magnetic signal of reflection can estimate the characteristic of testee at receiving coil, magneto sensor (as: Hall element, magnetoresistive element, magnetostriction element, magnetodiode, magnetic sensitive transistor etc.).Whole system can regard the transmission system that take magnetic wave as wireless transmission carrier as, and the path of transmission can be regarded as a reflex path magnetic channel.If suitably control electric current and the physique thereof of transmitting coil, magnetic field can be made to be positioned at the linear segment of B-H loop, and whole system is operated in the range of linearity, is equivalent to the FIR filter of high-order, can represent the characteristic of this magnetic channel with linear transfer function.Therefore by analyzing the transport function of this magnetic channel and various version thereof, its various parameter of identification, the information such as material, space distribution of testee is obtained, and can according to the situation of change of certain or multiple parameter with two dimension or 3-D display imaging.
According to above principle and in conjunction with the inversion principle of reflex path magnetic channel transfer functions, the present invention proposes a kind of detection based on wideband magnetic wave reflex path parameter identification and formation method and device.The magnetic permeability, specific inductive capacity etc. of different materials are not identical, have anisotropy, therefore the magnetic resistance that different materials presents in same magnetic field is different.Therefore, in same magnetic field, utilize receiving coil or various magneto sensor as the receiver of magnetic wave reflected signal, convert the magnetostatic wave signal through magnetic wave reflex path to electric signal, according to the reflex path magnetic channel transfer characteristic that can be finally inversed by the fillet space at this probe (containing transmitting coil, receiving coil and various magneto sensor) place with reflected signal that transmits.By mode such as transmitting-receiving array or moving sweep etc., three-dimensional fusion is realized to the transport function of the fillet space inversion residing for Transmit-Receive Unit, a face transport function or body transport function can be obtained, and carry out aerial image according to the characteristic of channel of magnetic wave reflex path, imaging results reflects the shape of measured object, material, structure, space distribution and motion conditions etc. thereof.
In order to reach above object, the detection based on wideband magnetic wave reflex path parameter identification of the present invention and imaging device comprise and detect front end, signal transacting rear end two parts, and its respective structure is as follows:
Described is the sensor of described device based on the detection of wideband magnetic wave reflex path parameter identification and the detection front end of imaging device, specifically be made up of communication module, detection signal generation module, array probe, reflected signal pretreatment module, moving sweep module, controller, storer and power supply, the function and structure of modules is as described below:
The communication module of above-mentioned detection front end for realizing detecting communicating of front end and signal transacting rear end, the receptions such as the control information produce signal transacting rear end, and is transferred to the detection signal generation module detecting front end; The magnetic wave reflected signal through the process of reflected signal pretreatment module that array probe receives is transferred to signal transacting rear end.Comprise signal transmitting and receiving unit, data transmission interface unit.Wired or wireless mode can be adopted to carry out data transmission.
The controling parameters information that the detection signal generation module of above-mentioned detection front end will obtain from communication module, the controlled multi-channel wideband orthogonal electrical signal of the parameters such as generating power, centre frequency, phase place, bandwidth, to encourage array probe, comprises D/A conversion unit, phase control unit, power amplification unit, filter unit, feeding network unit.
The wideband orthogonal electrical signal that detection signal generation module produces is converted to magnetic signal and launches to testee and receive magnetic wave reflected signal by the array probe of above-mentioned detection front end.Be made up of multiple wire coil and magneto sensor, wherein (hub of a spool can place different materials according to application demand to wire coil, as air, magnetic material, and select winding method according to detected object actual conditions) be arranged in array composition according to certain mode, various magneto sensor (Hall element, magnetoresistive element, magnetostriction element, magnetodiode, magnetic sensitive transistor etc.) be placed between coil, each coil can be set to launch as required, receive two kinds of patterns, each detection has at least a coil to be set to emission mode, be responsible for launching and detect magnetostatic wave signal, magneto sensor and the coil being set to receiving mode are responsible for receiving magnetic wave reflected signal.
Pop one's head in various types of magnetic wave reflected signals of receiving of the reflected signal pretreatment module pair array of above-mentioned detection front end carry out denoising, remove the pre-service such as mutual inductance between coil and between coil and magneto sensor and self inductance effect, then be sent to signal transacting rear end by communication module, comprise filter unit, LNA big unit and AD conversion unit.
The motion-control module of above-mentioned detection front end is responsible for the motion of control and perception array probe, containing motion motor unit, GPS positioning unit.
The work controlling to detect each functional module of front end is responsible for by the controller of above-mentioned detection front end.
The storer of above-mentioned detection front end is used for the data that buffer memory detects each functional module of front end.
The power supply of above-mentioned detection front end is responsible for the power supply to detecting front end modules, device.
Described can be a computing machine or network cloud processing terminal based on the detection of wideband magnetic wave reflex path parameter identification and the signal transacting rear end of imaging device, it is the data processing terminal of described device, specifically be made up of communication module, magnetoreflection characteristics of channel inverting module, reflex path Fusion Module, imaging display module, human-computer interaction module, processor, storer and power supply, the function and structure of modules is as described below:
The magnetic wave reflected signal detecting front-end detection for realizing signal transacting rear end and detecting communicating of front end, and is transferred to magnetoreflection characteristics of channel inverting module by the communication module of above-mentioned signal transacting rear end.Comprise signal transmitting and receiving unit, data transmission interface unit.Wired or wireless mode can be adopted to carry out data transmission.
The magnetoreflection characteristics of channel inverting module of above-mentioned signal transacting rear end is a computer software module, its role is to carry out identification and inverting to the analytic solution of the magnetoreflection path in single fillet space and parameter attribute thereof, and result is passed to reflex path Fusion Module.
The reflex path Fusion Module of above-mentioned signal transacting rear end is a computer software module, the magnetoreflection path in each fillet space of array probe is its role is to carry out multidimensional fusion, obtain the inner parameter characteristic of testee, and fusion results is transferred to imaging display module.
The imaging display module pair array probe of above-mentioned signal transacting rear end and the two dimension of moving sweep thereof, Three-Dimensional Magnetic reflex path characteristic are carried out imaging and show, and comprise computer generated image software for display unit, display unit.
The human-computer interaction module of above-mentioned signal transacting rear end provides interface and the peripheral hardware of man-machine interaction.
The data of each functional module of processing signals process rear end are responsible for by the processor of above-mentioned signal transacting rear end.
The storer of above-mentioned signal transacting rear end is used for the data of each functional module of buffered signal process rear end.
The power supply of above-mentioned signal transacting rear end is responsible for the power supply to signal transacting rear end modules, device.
Another object of the present invention is to propose a kind of detection based on wideband magnetic wave reflex path parameter identification and formation method, specific implementation step comprises:
Step 1: device control parameters is arranged.Testing staff passes through the man-machine interaction peripheral hardware of device signal transacting rear end, the controling parameters of setting device.The controling parameters arranged comprises: transmission signal parameters; Communication module parameter; The coil state parameter (as: launch, receive) of array probe, and be set to the transmission signal parameters of the coil of emission state; Receiving parameter is arranged; Magnetic channel transfer characteristic inverting module parameter; Channel Fusion Module parameter; Imaging display module parameter.
Step 2: appliance arrangement state detects automatically.The state that this step detects comprises: the communication module connection status detecting front end and signal transacting rear end, detects the connection status of the inner modules in front end, the connection status of the inner modules in signal transacting rear end.
Step 3: the gain calibration before detection.Wherein gain calibration mode comprises two kinds: manual gain and automatic gain; Manual gain calibrating mode by testing staff according to various gain parameters of featured configuration such as the structure of measured object and character; Automatic gain calibration mode is then after measured object obtains certain sample, and signal transacting rear end estimates the various gain parameters of the characteristics such as measured object structure and character automatically; Wherein gain parameter comprises the various magnetic parameters, electrical quantity etc. of magnetic wave in various dielectric material, the gain size of each time point, bandpass filtering frequency bandwidth, contrast size.
Step 4: device detects initial calibration.Transmission signal parameters information set by step 1, signal transacting rear end generates controling parameters information, and the detection signal generation CMOS macro cell multi-channel wideband orthogonal electrical signal detecting front end is transferred to via communication module, each transmitting coil of array probe, by the excitation of electric signal, launches magnetostatic wave signal to without detecting object space.Each receiving coil of array probe and the magneto-dependent sensor of coil peripherals receive magnetic wave reflected signal, magnetic wave reflected signal are transferred to reflected signal pretreatment module simultaneously.The magnetic wave reflected signal that the magneto-dependent sensor of each receiving coil and coil peripherals receives by reflected signal pretreatment module and parameter attribute thereof store, and are recorded as the initial calibration data of device.When the effect of this step is to be recorded in without measured object, the parameter information of the magnetic wave reflected signal that array probe is produced by the mutual inductance between wire coil and between wire coil and magneto sensor and self inductance effect etc.
Step 5: launch magnetostatic wave signal.After experienced by step 4, array probe is aimed at object to be detected, transmission signal parameters information simultaneously set by step 1, the coil state parameter of array probe, the state of setting are the parameter of the coil transmissions signal launched, signal transacting rear end generates controling parameters information, and the detection signal generation CMOS macro cell multi-channel wideband orthogonal electrical signal detecting front end is transferred to via communication module, each transmitting coil of array probe, by the excitation of electric signal, launches magnetostatic wave signal to testee.
Step 6: receive magnetic wave reflected signal.Receiving parameter information set by step 1, each receiving coil of array probe and the magneto sensor of coil peripherals receive magnetic wave reflected signal, and be transferred to reflected signal pretreatment module, and process together with the device initial calibration data recorded with step 4, to remove array probe when without measured object, the magnetic wave reflected signal produced by the mutual inductance between wire coil and between wire coil and magneto sensor and self inductance effect etc., the correction reflected signal of each receiving coil that acquisition measured object produces and magneto-dependent sensor, pass through communication module, be transferred to the magnetoreflection characteristics of channel inverting module of signal transacting rear end.
Step 7: magnetoreflection path inverting.According to the information of the transmitting detection signal that step 1 configures, the information of the correction reflected signal that step 6 receives, magnetoreflection characteristics of channel inverting module is finally inversed by transport function and the various variation (as: time domain conversion, frequency domain conversion etc.) thereof of magnetoreflection path.Again according to mentioned above, from electric field Induced magnetic field, magnetic field is through testee, the magnetic field induced electric field of change, the space distribution, inner structure, material properties etc. of testee all can reflect to some extent in transport function, according to the magnetic parameter (as: magnetic permeability) of material, the characteristic of electrical quantity (as: specific inductive capacity, conductivity), the characteristic of testee on this space fillet reflex path can be finally inversed by.Then multiple fillet magnetoreflection characteristics of channel inversion results of each receiving coil and neighbouring magnetic susceptibility unit thereof are transferred to reflex path Fusion Module and process.
Step 8: magnetoreflection path merges.By multiple fillet magnetoreflection characteristics of channel of step 7 inverting and spatial information thereof, merge at reflex path Fusion Module, obtain the space body transition function of the inspected object on array probe position, and result is transferred to imaging display module.
Step 9: display and imaging.From magnetic parameter, the electrical quantity characteristic of the space body transition function binding object different materials that above step obtains, to reflex path fundamental function and the mapping of various variation thereof, mapping results shows at man-machine interactive platform, and judges certain angle internal feature of testee.
Step 10: array probe moving sweep imaging.Signal transacting rear end controls the motion of array probe or the motion conditions of perception array probe by communication module, repeat step 5 to step 9, obtaining array probe at the image of each azimuth scan merges, and obtains the three-dimensional imaging result of object, and obtains its multi-faceted internal feature information.
In addition, the above-mentioned detection based on wideband magnetic wave reflex path parameter identification and formation method, before step 1, can carry out sample data collection to inspected object sample; Detecting data is stored in the storer of signal transacting rear end, as the reference frame of the judgement of object character and inherent vice identification in testing process, to improve the speed of detection.The sample data gathered should comprise the master sample data of various material, the data of basic configuration object master sample, the data etc. of the data of the master sample under various space distribution situation and the various defect classification of sample interior, and form the feature databases such as material, shape, space distribution, defect classification.
In addition, the above-mentioned detection based on wideband magnetic wave reflex path parameter identification and formation method, under the prerequisite not affecting measured object use, can add magnetic conductance object (as: iron powder) before detection to increase magnetic wave reflection strength in measured object inside.
A kind of detection based on wideband magnetic wave reflex path parameter identification proposed by the invention and formation method and device, in conjunction with Theory of Electromagnetic Field, with wideband magnetic wave for information carrier, adopt various characteristic parameter and the imaging of the transport function of infosystem and the testee in various change inverting space thereof, have the following advantages:
(1) the present invention take magnetic wave as carrier, carries out three-dimensional imaging by the parameter identification result of the transport function of magnetoreflection path residing for measured object, and then identifies the feature such as material, space distribution of measured object, realizes Non-Destructive Testing.
(2) the present invention adopts magnetic wave as Detection Information carrier, can realize non-contact detection, relative to ultrasonic detecting technology, not need couplant, be applicable to the detection of high temperature, complex structure; Magnetostatic wave signal is fast in spatial attenuation simultaneously, relative to the detection technique such as X-ray, nuclear magnetic resonance, has the advantage that space loss is little, and harmless to people.
(3) the present invention adopts broadband signal for transmitting, and according to Shannon information theory, can increase quantity of information, relative to existing be the Detection Techniques transmitted with pulse signal, can significantly improve accuracy of detection and imaging definition.
(4) the present invention is using hot-wire coil as the transmitter unit of magnetostatic wave signal, and relative to radar, can launch low frequency signal when bore is little, device has the advantages that volume is little, cost is low.
(5) the present invention can adopt supersonic range magnetic signal as carrier signal, and relative to magnetic resonance detection technology, the power transmitted and frequency significantly reduce, without radio frequency thermal effect and noiseless, harmless to biosome, is applicable to long-time on-line checkingi.
(6) the present invention can adopt split-type structural, and detection front end and signal transacting rear end are by wired or wireless connections, and signal transacting rear end realizes by high-performance computer or network processes terminal.Relative to existing image-forming detecting system, the volume of fore device can be reduced, realize portable inspectiont, and can ensure even to improve accuracy of detection.Be applicable to the application scenario such as Distributed Detection, on-line checkingi, portable detection, remote detection on a large scale.
(7) signal transacting rear end of the present invention has abundant feature database, can realize automatic identification, therefore reduces the requirement of testing staff, simple to operation, and after testing process terminates, namely can complete examining report, and improves the efficiency detected.
Accompanying drawing explanation
Fig. 1 is system chart of the present invention;
Fig. 2 is the detection schematic diagram based on wideband magnetic wave reflex path parameter identification of the present invention;
Fig. 3 is B-H loop and the range of linearity thereof;
Fig. 4 is the floor map of array probe of the present invention;
Fig. 5 is the diagrammatic cross-section of the transmitting coil of array probe of the present invention;
Fig. 6 is workflow diagram of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail illustrates, but embodiments of the present invention are not limited thereto.
Embodiment
Information theory and Computational electromagnetics organically combine by the present invention, using wideband magnetostatic wave signal as information carrier, with transport function and the various change thereof of infosystem, in conjunction with magnetic and the electrical quantity feature of Maxwell equation and material, by the parameter identification to magnetoreflection path, realize the Non-Destructive Testing to testee and three-dimensional imaging.The present invention have contactless, precision is high, harmless to people, environment loss is little, bore probe is little, volume is little, low-power consumption, hardware are simple and low cost and other advantages, detect at underground water oil and gas pipes, highway bridge detect, industry manufacture is detected, the field such as biological and human detection has wide practical use.
Be detected as example with underground water oil and gas pipes, existing detection method comprises: endoscope check method, X-ray check and detections of radar method.Wherein, endoscope check method needs to arrange camera in pipeline, is identified by wired or wireless transmission optical imagery, and detection speed is slow, and has certain infringement to pipeline.X-ray check and detections of radar belong to noninvasive imaging detection method, but X-ray check method needs radioactive source, harmful, be not suitable for using on a large scale, and detection speed are slow.Detections of radar can realize harmless non-contact detecting, but run into metallics and can produce electromagnetic screen and the internal structure that testee cannot be spied upon, and adopt pulsed electromagnetic wave as detection signal, timing accuracy is high, detection time is short, instantaneous power is high, hardware dynamic scope is large, and be operated in radio frequency band, therefore hardware cost is high, expensive.In addition need change different antennas time during detection different depth underground pipeline, be not suitable for universal use.In sum, there is various problem in existing underground water oil and gas pipes detection method, is badly in need of solving.
Described a kind of detection based on wideband magnetic wave reflex path parameter identification of the present invention and formation method and device can effective head it offs.The present invention adopts wideband magnetostatic wave signal as detection signal, can realize, to the Non-Destructive Testing of underground unlike material pipeline, comprising: the nonmetallic materials such as PVC and metal material under non-contacting condition.Hereafter by for the jam detection of underground blow-off line, the specific embodiment of the present invention being described, is namely the blocking position detecting underground blow-off line.
As shown in Figure 1, be of the present invention a kind of based on the detection of wideband magnetic wave reflex path parameter identification and the system chart of imaging device.This device, each other can by wireless or to be wiredly connected primarily of detection front end and signal transacting rear end two large divisions composition.
The major function that this embodiment detects front end is the orthogonal magnetostatic wave signal of transmitting-receiving wideband, frequency range exists: the wherein concrete signal transmission center frequency values of 20KHz-25KHz(can consider selection according to the degree of depth detected and resolution requirement), be equivalent to the sensor of whole device, primarily of communication module, detection signal generation module, array probe, reflected signal pretreatment module, moving sweep module, controller, storer and electric power generating composition.Wherein, communication module, is responsible for the transmission of control information between signal transacting rear end and detection front end, Received signal strength; Detection signal generation module, the controling parameters information produced according to signal transacting rear end, generates multi-channel wideband orthogonal electrical signal; Array probe, for the detection and location to underground pipeline, pipeline, defect and blocking, wherein transmitting coil is subject to the excitation of the electric signal that detection signal generation module produces, and launches magnetostatic wave signal, and receiving coil and magneto sensor receive magnetic wave reflected signal; Reflected signal pretreatment module, for docking the calibration, pre-service etc. of receiving and transmitting; The motion of the control of moving sweep module in charge or perception array probe; The work controlling each functional module is responsible for by controller; Storer is used for the data of each functional module of buffer memory; Power supply is responsible for the power supply to modules, device.
The major function of this embodiment signal transacting rear end carries out magnetoreflection path parameter identification, inverting, fusion and imaging reality to the magnetoreflection signal detecting front end receiver, can be a computing machine or network processes cloud terminal, be made up of communication module, magnetoreflection characteristics of channel inverting module, reflex path Fusion Module, imaging display module, human-computer interaction module, processor, storer and power supply.Wherein, communication module is responsible for communicating with detection front end, and send control information the reflected signal received with receiving array probe; The analytic solution of the magnetic channel in the single fillet space of magnetoreflection characteristics of channel inverting module in charge carries out parameter identification and inverting; Reflex path Fusion Module complex fusion multiple fillet space magnetoreflection path; Imaging display module carries out catoptric imaging to Three-Dimensional Magnetic reflex path characteristic and shows; Human-computer interaction module is used for external control information input and the output processing of testing result, realizes man-machine interaction; The data processing each functional module are responsible for by processor; Storer is used for the data of each functional module of buffer memory; Power supply is responsible for the power supply to modules, device.
The data handling procedure of this embodiment is as follows: communication module is passed through in signal transacting rear end, control the array probe transmitting-receiving magnetostatic wave signal detecting front end, the reflection magnetostatic wave signal that array probe receives first carries out pre-service through reflected signal pretreatment module, signal transacting rear end is sent it back again by communication module, the process of the magnetoreflection characteristics of channel inverting module of magnetic wave reflected signal through signal transacting rear end, reflex path Fusion Model and image-forming module, imaging is shown on display device.There is human-computer interaction module signal transacting rear end in addition, and the setting of controling parameters information that can realize detecting, the output of the setting of control information and Output rusults are arranged.
In addition, the reflected signal processing mode of device comprises two kinds: off-line data collecting with process in real time.Wherein off-line data collecting is used for when communication environment is severe, detect front end according to the parameter preset, control the transmitting-receiving of magnetostatic wave signal, and by receive transmit be stored in detect front end storer in, until time communication condition improves, be transmitted into signal transacting back-end processing by communication module; The real-time process detection be used for when detecting in real time underground blow-off line receives the process of reflected signal and imaging shows.
The present invention is based on the detection signal of wideband magnetic wave reflex path parameter identification as shown in Figure 2.The array probe of the present embodiment is placed on above underground blow-off line to be detected, the magneto sensor that array probe contains the transmitting coil of arrayed, the receiving coil of arrayed and is distributed in around coil.Transmitter current Is (t) flows through transmitting coil excitation-emission magnetostatic wave signal, magnetic wave is received by different receiving coil and magneto sensor after the reflection of underground blow-off line, produces the information such as induction electromotive force, induction current Ir (t), induced impedance.Permanent magnet is placed at transmitting coil back in addition, is outwards pushed in magnetic field, to increase the detection degree of depth.
According to the Ampere theorem of Maxwell equation, the electric field of change produces magnetic field, and magnetic field produces magnetic flux at certain curved surface, the magnetic flux of unit area and magnetic induction density.Wherein, the magnetic induction density of magnetic material and the relation of magnetic field intensity are nonlinear, commonly use B-H loop be described magnetic history in technology application aspect, and concrete visible Fig. 3, in subregion, the two has linear relationship.Magnetic induction density follows the magnetic parameter, electrical quantity etc. of the spatial parameter of measured object, material closely related simultaneously.Respond to theorem by faraday again, the magnetic field of change can induced electric field, and produce induction electromotive force, its size is directly proportional to the rate of change of magnetic flux to the time.Therefore, can estimate the characteristic of testee in the information such as the induction electromotive force of inducting, induction current, induced impedance of receiving coil, magneto sensor etc. with reflection magnetic signal according to the electric current of transmitting coil.Whole system can regard the transmission system that take magnetic wave as wireless transmission carrier as, and the path of transmission can be regarded as a reflex path magnetic channel.If suitably control electric current and the physique thereof of transmitting coil, magnetic field can be made to be positioned at the linear segment of B-H loop, and whole system is operated in the range of linearity, is equivalent to the FIR filter of high-order, can represent the characteristic of this magnetic channel with linear transfer function.Therefore by analyzing the transport function of this reflex path magnetic channel and various version thereof, its various parameter of identification, the information such as material, space distribution of testee is obtained, and can according to the situation of change of certain or multiple parameter with two dimension or 3-D display imaging.According to above principle and in conjunction with the inversion principle of reflex path magnetic channel transfer functions, the present invention proposes a kind of detection based on wideband magnetic wave reflex path parameter identification and formation method.The magnetic permeability, specific inductive capacity etc. of different materials are not identical, have anisotropy, therefore the magnetic resistance that different materials presents in same magnetic field is different.Therefore, in same magnetic field, probe converts the magnetic signal through magnetic wave reflex path to electric signal by receiving coil and various magneto sensor, according to transmit and Received signal strength can be finally inversed by the reflex path magnetic channel transfer characteristic in the fillet space at this probe place, this transport function with time, space etc. for parameter.By the mode such as linear transducer array or moving sweep, three-dimensional fusion is realized to the transport function of the fillet space inversion of single probe, a face transport function or body transport function can be obtained, and carry out aerial image according to the characteristic of channel of reflex path, imaging results reflects the shape of measured object, material, structure, space distribution and motion conditions etc. thereof.
As shown in Figure 4, be the floor map of array probe of the present invention.Array probe is made up of multiple wire coil and magneto sensor, wherein wire coil is arranged in array composition according to certain mode, and various magneto sensor (Hall element, magnetoresistive element, magnetostriction element, magnetodiode, magnetic sensitive transistor etc.) is placed between coil.Each coil can be set to launch, receive two kinds of patterns as required.Each detection has at least a coil to be set to emission mode, is responsible for launching and detects magnetostatic wave signal.Magneto sensor and the coil being set to receiving mode are responsible for receiving magnetic wave reflected signal.
Meanwhile, the detected object of the implementation case is buried target, and in order to increase effective detection degree of depth and the accuracy of detection of magnetic wave as far as possible, the transmitting coil described in Fig. 4 can adopt spiral structure, and its sectional view as shown in Figure 5.Transmitting coil is air core coil, and winding method adopts the number of turn to successively decrease spiral structure.This structure has magnetic focusing effect, makes magnetic field focus on a point as far as possible, to improve the precision of detection.The side that the number of turn of coil is less is the front of coil, for launching magnetic wave.The more side of coil turn is the back side, places permanent magnet, its role is to provide magnetic field DC component and pushed outward in magnetic field, and the logical exchange current of coil provides magnetic field AC compounent.Because permanent magnet is passive, therefore the basis that can not increase at system total power is improved effective detection degree of depth of array probe.
The present invention realizes a kind of detection based on wideband magnetic wave reflex path parameter identification and formation method simultaneously, and its workflow diagram, as Fig. 6, comprises the following steps:
Step 1: pick-up unit controling parameters is arranged.In testing process, testing staff passes through the interpersonal mutual peripheral hardware of device signal transacting rear end, the controling parameters of setting device.The controling parameters arranged is needed to comprise:
(1) emission parameter is arranged, and comprising: array probe transmitting coil Unit selection, and launch type of drive and select, transmit waveform, signal intensity, transmission center frequency values, transmitted bandwidth, emission angle and the initial phase transmitted.
(2) receiving parameter is arranged, and comprising: array probe receiving coil Unit selection, Received signal strength bandwidth, receive frequency off-set value, receiving angle, sample frequency, sampled point number, receiving window size, receive advance time size, the pre-set velocity of magnetic wave in testee medium.
(3) selection of communication and location parameter, the optimum configurations of communication module, comprising: the connected mode of communication and the network address, the location parameter of array probe and the setting of moving sweep mode.
(4) testing result display parameter are arranged, and comprising: display mode (comprising the display of three-dimensional stereo model, two dimensional image or one dimension wave form), coordinate axis displaing coordinate and scope, image display contrast, contrast size; If what testing process adopted is 3-D scanning mode, the location parameter of every bar survey line of detection also to be set, comprises the interval between survey line, initial point position, scanning shift, transverse and longitudinal direction survey line selection etc.
Step 2: appliance arrangement state-detection.The state that this step detects comprises: detect front end and signal transacting rear end connection status, detects the connection status of front end modules, the connection status of each device of signal transacting rear end, the power supply capacity state of device.Wherein only when said apparatus equipment state is normal operation, next step operation can be carried out; To break down error condition if any equipment, then in man-machine interactive platform prompting error message, and terminate current detection workflow.
Step 3: the gain calibration before detection.The gain calibration mode wherein can selected comprises following two kinds: manual gain and automatic gain; If select manual gain calibrating mode, then by testing staff according to various gain parameters of featured configuration such as the structure of measured object and character; If select automatic gain calibration mode, then by after obtaining certain sample at measured object, signal transacting rear end estimates the various gain parameters of the characteristics such as measured object structure and character automatically; Wherein gain parameter comprises the various magnetic parameters, electrical quantity etc. of magnetic wave in various dielectric material, the gain size of each time point, bandpass filtering frequency bandwidth, contrast size.
Step 4: device detects initial calibration.Transmission signal parameters information set by step 1, signal transacting rear end generates controling parameters information, and the detection signal generation CMOS macro cell multi-channel wideband orthogonal electrical signal detecting front end is transferred to via communication module, each transmitting coil of array probe, by the excitation of electric signal, launches magnetostatic wave signal to without detecting object space.Each receiving coil of array probe and the magneto-dependent sensor of coil peripherals receive magnetic wave reflected signal, magnetic wave reflected signal are transferred to reflected signal pretreatment module simultaneously.The magnetic wave reflected signal that the magneto-dependent sensor of each receiving coil and coil peripherals receives by reflected signal pretreatment module and parameter attribute thereof store, and are recorded as the initial calibration data of device.When the effect of this step is to be recorded in without measured object, the parameter information of the magnetic wave reflected signal that array probe is produced by the mutual inductance between wire coil and between wire coil and magneto sensor and self inductance effect etc.Then judgment means is the need of power cut-off, as received END instruction, then terminates current detection workflow; Otherwise proceed next step operation.
Step 5: launch magnetostatic wave signal.After experienced by step 4, array probe is aimed at object to be detected, transmission signal parameters information simultaneously set by step 1, the coil state parameter of array probe, the state of setting are the parameter of the coil transmissions signal launched, signal transacting rear end generates controling parameters information, and the detection signal generation CMOS macro cell multi-channel wideband orthogonal electrical signal detecting front end is transferred to via communication module, each transmitting coil of array probe encourages by electric signal, launches magnetostatic wave signal to testee.
Step 6: receive magnetic wave reflected signal.Receiving parameter information set by step 1, each receiving coil of array probe and the magneto sensor of coil peripherals receive magnetic wave reflected signal, and be transferred to reflected signal pretreatment module, and process together with the device initial calibration data recorded with step 4, to remove array probe when without measured object, by the magnetic wave reflected signal of the generation of the mutual inductance between wire coil and between wire coil and magneto sensor and self inductance effect etc., the correction reflected signal of each receiving coil that acquisition measured object produces and magneto-dependent sensor, pass through communication module, be transferred to the magnetoreflection characteristics of channel inverting module of signal transacting rear end.
Step 7: magnetoreflection path inverting.According to the information of the transmitting detection signal that step 1 configures, the information of the correction reflected signal that step 6 receives, magnetoreflection characteristics of channel inverting module is finally inversed by transport function and the various variation (as: time domain conversion, frequency domain conversion etc.) thereof of magnetoreflection path.Again according to mentioned above, from electric field Induced magnetic field, magnetic field is through testee, the magnetic field induced electric field of change, the space distribution, inner structure, material properties etc. of testee all can reflect to some extent in transport function, according to the magnetic parameter (as: magnetic permeability) of material, the characteristic of electrical quantity (as: specific inductive capacity, conductivity), the characteristic of testee on this space fillet reflex path can be finally inversed by.Then judge whether the inverting of multiple fillet magnetoreflection paths of each receiving coil and neighbouring magnetosensitive unit thereof all completes, if not yet completed, continue to repeat step 5 to step 7; If inverting completes, then will carry out next step operation.
Step 8: magnetoreflection path merges.By multiple fillet magnetoreflection path parameter attribute of step 7 identification and inverting and spatial information thereof, merged by reflex path Fusion Module, obtain the space body transition function of the inspected object on array probe position, and result is transferred to imaging display module.
Step 9: display and imaging.From the space body transition function that above step obtains, according to information such as its amplitude, phase place, time delays, the magnetic parameter of binding object different materials, electrical quantity characteristic, to transition function and the mapping of various variation thereof, mapping results shows at man-machine interactive platform, and judges certain angle internal feature of testee.Then judge array probe the need of moving sweep to change the angle that detects thus to know the characteristic information of other angles of testee according to the result being shown as picture, if need moving sweep, then carry out next step operation, if do not need moving sweep, then terminate current detection workflow.
Step 10: array probe moving sweep imaging.Signal transacting rear end is controlled by communication module or the motion of perception array probe, repeat step 5 to step 9, obtains array probe at the image of each azimuth scan to merge, and obtains the multiplanar imaging result of object, and obtains its multi-faceted internal feature information.
In addition, the above-mentioned detection based on wideband magnetic wave reflex path parameter identification and formation method, before step 1, can carry out sample data collection to inspected object sample; Detecting data is stored in the storer of signal transacting rear end, as the reference frame of the judgement of object character and inherent vice identification in testing process, to improve the speed of detection.The sample data gathered should comprise the master sample data of various material, the data of basic configuration object master sample, the data etc. of the data of the master sample under various space distribution situation and the various defect classification of sample interior, and form the feature databases such as material, shape, space distribution, defect classification.
For the present embodiment, owing to causing the object of underground bowl sewage draining pipeline blockage to have diversity, imaging can realize the internal imaging of blow-off line according to the method described above, but the target identification of some blocking position may be obvious not.Therefore, the magnetic conductance powder of iron powder and so on can be added to strengthen magnetic wave reflection strength at blow-off pipe before detection.Due to blowdown in-pipe flow, do not have the position iron powder blocked not have more precipitation, distribute more even; And at blocking position, because sluggish flow iron powder can precipitate in a large number, obvious reflector space can be seen when imaging shows, the position of blocking can be located rapidly, and clearly can show the inner degree of blocking and the composition, space distribution etc. of tamper.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included in protection scope of the present invention.
Claims (7)
1. based on the detection of wideband magnetic wave reflex path parameter identification and formation method and device, it is characterized in that taking magnetic wave as carrier information, magnetic wave is reflected the path experienced and regard a reflex path magnetic channel as, receiving and transmitting signal is utilized to obtain the transport function of magnetic wave reflex path and various variation thereof, in conjunction with the magnetic of different materials, electrical parameter attribute such as grade, be finally inversed by the material of this fillet spatially testee, the characteristics such as space distribution, and the magnetic wave reflex path transport function of different spatial is merged, can be quick, efficiently, the three dimensional lossless accurately realizing object detects and imaging.
2., based on detection and the imaging device of wideband magnetic wave reflex path parameter identification, it is characterized in that comprising and detect front end, signal transacting rear end, both are by wireless or wired connection; Wherein, the reception that the generation of detection signal, the transmitting of magnetostatic wave signal and magnetic wave reflected signal are responsible in front end is detected; The generation of controling parameters information, the process of Received signal strength of whole device are responsible in signal transacting rear end, realize the inverting of magnetoreflection path, fusion and imaging display;
Above-mentioned is the sensor of described device based on the detection of wideband magnetic wave reflex path parameter identification and the detection front end of imaging device, is specifically made up of communication module, detection signal generation module, array probe, reflected signal pretreatment module, moving sweep module, controller, storer and power supply, wherein communication module detects communicating of front end and signal transacting rear end for realizing, the controling parameters information etc. that signal transacting rear end produces is transferred to the detection signal generation module detecting front end, the reflection magnetic signals through the process of reflected signal pretreatment module received by array probe is to signal transacting rear end, comprise signal transmitting and receiving unit, data transmission interface unit, wired or wireless mode can be adopted to carry out data transmission, the controling parameters information that detection signal generation module will obtain from communication module, the controlled multi-channel wideband orthogonal electrical signal of the parameters such as generating power, centre frequency, phase place, bandwidth, to encourage array probe, comprises D/A conversion unit, phase control unit, power amplification unit, filter unit, feeding network unit, the wideband orthogonal electrical signal that detection signal generation module produces is converted to magnetic signal and launches to testee and receive magnetic wave reflected signal by array probe, be made up of multiple wire coil and magneto sensor, wherein (hub of a spool can place different materials according to application demand to wire coil, as air, magnetic material, and select winding method according to detected object actual conditions) be arranged in array composition according to certain mode, various magneto sensor (Hall element, magnetoresistive element, magnetostriction element, magnetodiode, magnetic sensitive transistor etc.) be placed between coil, each coil can be set to launch as required, receive two kinds of patterns, between each detection period, a coil is had at least to be set to emission mode, be responsible for launching and detect magnetostatic wave signal, magneto sensor and the coil being set to receiving mode are responsible for receiving and are launched magnetostatic wave signal, reflected signal pretreatment module pair array various types of magnetic wave reflected signals received of popping one's head in carry out denoising, remove the pre-service such as mutual inductance and self inductance effect between each coil and between coil and magneto sensor, then be sent to signal transacting rear end by communication module, comprise filter unit, LNA big unit, AD conversion unit, motion-control module is responsible for the motion of control and perception array probe, containing motion motor unit, GPS positioning unit, the work controlling each functional module is responsible for by controller, storer is used for the data of each functional module of buffer memory, power supply is responsible for the power supply to modules, device,
Above-mentioned can be a computing machine or network cloud processing terminal based on the detection of wideband magnetic wave reflex path parameter identification and the signal transacting rear end of imaging device, be the data processing terminal of described device, be specifically made up of communication module, magnetoreflection characteristics of channel inverting module, reflex path Fusion Module, imaging display module, human-computer interaction module, processor, storer and power supply; Wherein, communication module is for realizing signal transacting rear end and detecting communicating of front end, and the magnetic wave reflected signal detecting front-end detection is transferred to magnetoreflection characteristics of channel inverting module, comprise signal transmitting and receiving unit, data transmission interface unit, wired or wireless mode can be adopted to carry out data transmission; Magnetoreflection characteristics of channel inverting module is a computer software module, its role is to carry out identification and inverting to the analytic solution of the magnetoreflection path in single fillet space and parameter attribute thereof, and result is passed to reflex path Fusion Module; Reflex path Fusion Module is a computer software module, its role is to the magnetoreflection path in each fillet space of array probe to carry out multidimensional fusion, obtains the inner parameter characteristic of testee, and fusion results is transferred to imaging display module; Two dimension, the Three-Dimensional Magnetic reflex path characteristic of imaging display module pair array probe and moving sweep thereof are carried out imaging and show, and comprise computer generated image software for display unit, display unit; Human-computer interaction module provides interface and the peripheral hardware of man-machine interaction; The data processing each functional module are responsible for by processor; Storer is used for the data of each functional module of buffer memory; Power supply is responsible for the power supply to modules, device.
3. the detection based on wideband magnetic wave reflex path parameter identification according to claim 2 and imaging device, it is characterized in that detecting the sensor that front end is described device, signal transacting rear end is responsible for the controling parameters setting of whole device, the process of Received signal strength and imaging and is shown; Detect front end to be separated with signal transacting rear end, adopt wireless or wired mode to be connected, can on the basis of miniaturization, portability the software processing capability of lifting gear, improve accuracy of detection.
4. the detection based on wideband magnetic wave reflex path parameter identification according to claims 2 and imaging device, it is characterized in that the array probe of described detection front end is the transmitting and receiving device of detection signal, arranged according to certain mode by multiple, need coil according to certain mode special coiling and magneto sensor composition according to application; Described coil can be set to launch, receive two states; In the application scenario of the effective detection degree of depth and accuracy of detection that increase magnetic wave as far as possible, as buried target detection etc., transmitting coil can adopt following structure: coil is air core coil, winding method adopts the number of turn to successively decrease spiral structure, produce magnetic focusing effect, what make magnetic field focuses on a point, to improve the precision of detection as far as possible; The side that the number of turn of coil is less is the front of coil, for launching magnetic wave; The more side of coil turn is the back side, place permanent magnet, its role is to magnetic field DC component is provided and magnetic field is pushed outward, and the exchange current that coil leads to provides magnetic field AC compounent, the basis that this structure can not increase at system total power is improved effective detection degree of depth of array probe.
5. based on detection and the formation method of wideband magnetic wave reflex path parameter identification, it is characterized in that the target detection principle of described magnetic wave reflex path parameter identification is: the array probe detecting front end is responsible for wideband quadrature detection magnetostatic wave signal launching and receiving, magnetic wave can regard a magnetic channel as from being transmitted into the path that reflection receivable experiences, according to Maxwell equation, the relating to parameters such as material, space distribution of its characteristic and testee; The transport function of reflex path can be obtained by receiving and transmitting signal, be finally inversed by the feature such as material and space distribution of the testee in this fillet space; Obtained the parameter attribute of the magnetoreflection path of different spatial by the mode such as array or moving sweep, its fusion can be obtained the two dimension of object, three-dimensional space distribution situation, realize interior of articles material identification and detect and imaging.
6. the detection based on wideband magnetic wave reflex path parameter identification according to claim 5 and formation method, it is characterized in that, under the prerequisite not affecting measured object use, magnetic conductance object (as: iron powder) to be added before detection in measured object inside to increase magnetic wave reflection strength.
7. the detection based on wideband magnetic wave reflex path parameter identification according to claim 5 and formation method, is characterized in that comprising the steps:
Step 1: device control parameters is arranged.Testing staff passes through the man-machine interaction peripheral hardware of device signal transacting rear end, the controling parameters of setting device.The controling parameters arranged comprises: transmission signal parameters; Communication module parameter; The coil state parameter (as: launch, receive) of array probe, and be set to the transmission signal parameters of the coil of emission state; Receiving parameter; Magnetic channel transfer characteristic inverting module parameter; Channel Fusion Module parameter; Imaging display module parameter;
Step 2: appliance arrangement state detects automatically.The state that this step detects comprises: the communication module connection status detecting front end and signal transacting rear end, detects the connection status of the inner modules in front end, the connection status of the inner modules in signal transacting rear end;
Step 3: the gain calibration before detection.Wherein gain calibration mode comprises two kinds: manual gain and automatic gain; Manual gain calibrating mode by testing staff according to various gain parameters of featured configuration such as the structure of measured object and character; Automatic gain calibration mode is then after measured object obtains certain sample, and signal transacting rear end estimates the various gain parameters of the characteristics such as measured object structure and character automatically; Wherein gain parameter comprises the various magnetic parameters, electrical quantity etc. of magnetic wave in various dielectric material, the gain size of each time point, bandpass filtering frequency bandwidth, contrast size;
Step 4: device detects initial calibration.Transmission signal parameters information set by step 1, signal transacting rear end generates controling parameters information, and the detection signal generation CMOS macro cell multi-channel wideband orthogonal electrical signal detecting front end is transferred to via communication module, each transmitting coil of array probe by the excitation of electric signal, to without inspected object spatial emission magnetostatic wave signal.Each receiving coil of array probe and the magneto-dependent sensor of coil peripherals receive magnetic wave reflected signal, magnetic wave reflected signal are transferred to reflected signal pretreatment module simultaneously.The magnetic wave reflected signal that the magneto-dependent sensor of each receiving coil and coil peripherals receives by reflected signal pretreatment module and parameter attribute thereof store, and are recorded as the initial calibration data of device.When the effect of this step is to be recorded in without measured object, the parameter information of the magnetic wave reflected signal that array probe is produced by the mutual inductance between wire coil and between wire coil and magneto sensor and self inductance effect etc.;
Step 5: launch magnetostatic wave signal.After experienced by step 4, array probe is aimed at object to be detected, transmission signal parameters information simultaneously set by step 1, the coil state parameter of array probe, the state of setting are the parameter of the coil transmissions signal launched, signal transacting rear end generates controling parameters information, and the detection signal generation CMOS macro cell multi-channel wideband orthogonal electrical signal detecting front end is transferred to via communication module, each transmitting coil of array probe, by the excitation of electric signal, launches magnetostatic wave signal to testee;
Step 6: receive magnetic wave reflected signal.Receiving parameter information set by step 1, each receiving coil of array probe and the magneto sensor of coil peripherals receive magnetic wave reflected signal, and be transferred to reflected signal pretreatment module, and process together with the device initial calibration data recorded with step 4, to remove array probe when without measured object, the magnetic wave reflected signal produced by the mutual inductance between wire coil and between wire coil and magneto sensor and self inductance effect etc., the correction reflected signal of each receiving coil that acquisition measured object produces and magneto-dependent sensor, pass through communication module, be transferred to the magnetoreflection characteristics of channel inverting module of signal transacting rear end,
Step 7: magnetoreflection path inverting.According to the information of the transmitting detection signal that step 1 configures, the information of the correction reflected signal that step 6 receives, magnetoreflection characteristics of channel inverting module is finally inversed by transport function and the various variation (as: time domain conversion, frequency domain conversion etc.) thereof of magnetoreflection path.Again according to mentioned above, from electric field Induced magnetic field, magnetic field is through testee, the magnetic field induced electric field of change, the space distribution, inner structure, material properties etc. of testee all can reflect to some extent in transport function, according to the magnetic parameter (as: magnetic permeability) of material, the characteristic of electrical quantity (as: specific inductive capacity, conductivity), the characteristic of testee on this space fillet reflex path can be finally inversed by.Then multiple fillet magnetoreflection characteristics of channel inversion results of each receiving coil and neighbouring magnetic susceptibility unit thereof are transferred to reflex path Fusion Module and process;
Step 8: magnetoreflection path merges.By multiple fillet magnetoreflection characteristics of channel of step 7 inverting and spatial information thereof, merge at reflex path Fusion Module, obtain the space body transition function of the inspected object on array probe position, and result is transferred to imaging display module;
Step 9: display and imaging.From magnetic parameter, the electrical quantity characteristic of the space body transition function binding object different materials that above step obtains, to reflex path fundamental function and the mapping of various variation thereof, mapping results shows at man-machine interactive platform, and judges certain angle internal feature of testee;
Step 10: array probe moving sweep imaging.Signal transacting rear end controls the motion of array probe or the motion conditions of perception array probe by communication module, repeat step 5 to step 9, obtaining array probe at the image of each azimuth scan merges, and obtains the three-dimensional imaging result of object, and obtains its multi-faceted internal feature information;
In addition, the above-mentioned detection based on wideband magnetic wave reflex path parameter identification and formation method, before step 1, can carry out sample data collection to inspected object sample; Detecting data is stored in the storer of signal transacting rear end, as the reference frame of the judgement of object character and inherent vice identification in testing process, to improve the speed of detection.The sample data gathered should comprise the master sample data of various material, the data of basic configuration object master sample, the data etc. of the data of the master sample under various space distribution situation and the various defect classification of sample interior, and form the feature databases such as material, shape, space distribution, defect classification.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105167771A (en) * | 2015-09-23 | 2015-12-23 | 广州彩磁信息技术有限公司 | Non-invasive bone tissue detection method and device based on dynamic magnetic excitation ion spectrum |
| CN105527338A (en) * | 2015-10-26 | 2016-04-27 | 华南理工大学 | Metal wire rope on-line monitoring method and device |
| 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 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004114221A1 (en) * | 2003-06-24 | 2004-12-29 | Philips Intellectual Property & Standards Gmbh | Device to generate a three-dimensional image of a moved object |
| CN101690672A (en) * | 2009-09-26 | 2010-04-07 | 哈尔滨工业大学（威海） | Array probe-based real-time photoacoustic imaging device |
| CN102262129A (en) * | 2010-04-16 | 2011-11-30 | 奥林巴斯Ndt公司 | Rotating array probe system for non-destructive testing |
| CN202149887U (en) * | 2011-07-29 | 2012-02-22 | 华南理工大学 | Flammable liquid detection device based on ultra wideband |
| CN202216721U (en) * | 2011-09-23 | 2012-05-09 | 华南理工大学 | Object internal information nondestructive testing system based on ultra wide band |
| CN103364779A (en) * | 2012-03-28 | 2013-10-23 | 中国科学院声学研究所 | Fixed forwarding strength-based target echo wave strength measurement method and fixed forwarding strength-based target echo wave strength measurement system |
-
2014
- 2014-12-05 CN CN201410740866.6A patent/CN104655714B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004114221A1 (en) * | 2003-06-24 | 2004-12-29 | Philips Intellectual Property & Standards Gmbh | Device to generate a three-dimensional image of a moved object |
| CN101690672A (en) * | 2009-09-26 | 2010-04-07 | 哈尔滨工业大学（威海） | Array probe-based real-time photoacoustic imaging device |
| CN102262129A (en) * | 2010-04-16 | 2011-11-30 | 奥林巴斯Ndt公司 | Rotating array probe system for non-destructive testing |
| CN202149887U (en) * | 2011-07-29 | 2012-02-22 | 华南理工大学 | Flammable liquid detection device based on ultra wideband |
| CN202216721U (en) * | 2011-09-23 | 2012-05-09 | 华南理工大学 | Object internal information nondestructive testing system based on ultra wide band |
| CN103364779A (en) * | 2012-03-28 | 2013-10-23 | 中国科学院声学研究所 | Fixed forwarding strength-based target echo wave strength measurement method and fixed forwarding strength-based target echo wave strength measurement system |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105167771A (en) * | 2015-09-23 | 2015-12-23 | 广州彩磁信息技术有限公司 | Non-invasive bone tissue detection method and device based on dynamic magnetic excitation ion spectrum |
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