CN103412053A - Wave-velocity-free acoustic emission source locating method based on acoustic emission sensor arrays and wave beam formation - Google Patents

Wave-velocity-free acoustic emission source locating method based on acoustic emission sensor arrays and wave beam formation Download PDF

Info

Publication number
CN103412053A
CN103412053A CN2013103086315A CN201310308631A CN103412053A CN 103412053 A CN103412053 A CN 103412053A CN 2013103086315 A CN2013103086315 A CN 2013103086315A CN 201310308631 A CN201310308631 A CN 201310308631A CN 103412053 A CN103412053 A CN 103412053A
Authority
CN
China
Prior art keywords
acoustic emission
sensor array
wave
voice sending
emission source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2013103086315A
Other languages
Chinese (zh)
Other versions
CN103412053B (en
Inventor
何田
肖登红
刘献栋
单颖春
于海生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beihang University
Original Assignee
Beihang University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beihang University filed Critical Beihang University
Priority to CN201310308631.5A priority Critical patent/CN103412053B/en
Publication of CN103412053A publication Critical patent/CN103412053A/en
Application granted granted Critical
Publication of CN103412053B publication Critical patent/CN103412053B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The invention discloses a wave-velocity-free acoustic emission source locating method based on acoustic emission sensor arrays and wave beam formation. The method comprises (1) a step of arranging an acoustic emission sensor array in a plate-type structure to be monitored both along the length direction and along the width direction, and establishing a coordinate system by using the direction of the acoustic emission sensor array in the length direction as the X axis, using the direction of the acoustic emission sensor array in the width direction as the Y axis, and using the intersection of the two directions of the acoustic emission sensor arrays as the origin; (2) a step of connecting acoustic emission sensors in an acoustic emission signal detection system to an acoustic emission signal collecting device through front-end amplifiers; (3) a step of turning on a power source and the acoustic emission signal collecting device, and then performing pencil-lead-broken experiments, observing whether each channel waveform is normally displayed, and performing data collection if the channel waveforms are normally displayed; (4) a step of individually subjecting acoustic emission signals which are collected by the acoustic emission sensor array in the length direction and the acoustic emission sensor array in the width direction to wave beam formation; and (5) a step of using the X coordinates determined by the acoustic emission sensor array in the length direction as the horizontal coordinates, and using the Y coordinates determined by the acoustic emission sensor array in the width direction as the vertical coordinates.

Description

A kind of acoustic emission source locating method without velocity of wave based on alliteration emission sensor array and wave beam formation
Technical field
The invention provides a kind of acoustic emission source locating method without velocity of wave based on alliteration emission sensor array and wave beam formation, it relates to a kind of engineering structure lossless detection method, relate in particular to a kind of acoustic emission source locating method that does not need velocity of wave, belong to the acoustic emission technical field of nondestructive testing.
Technical background
All kinds of equipments are widely used loading plate or class tabular (as housing) structure, as fuselage, wing and the hatch door of aircraft, fuselage and the housing of screw blade, naval vessel and submarine, the storage tank of katergol etc. of rotary wing aircraft.If damage occurs this class formation, will produce harmful effect to the equipment overall performance, even cause catastrophic equipment damage and personnel casualty accidents.The responsive type of impairment that in engineering, various lossless detection methods commonly used all have its unique application and can detect, detect the restriction that is subjected to granularity of magnet powder as magnetic, can only detect the surface crack with certain opening width; Eddy current method can only detect surface and nearly surface damage, insensitive to immerged crack; The detected object of X ray is the damage of volume type normally, and the size of sensitivity of film direction detected pieces can not be too large; The ultrasonic echo method both can detect surface crack also can detect immerged crack, but need to scan structure, and detection efficiency is lower, and reliability is not high when detecting closed crackle.When being applied to the platy structure damage check, said method all has certain limitation.These methods are local lossless detection method, to large scale structure, need to know in advance the Position Approximate of damage, or scanning is carried out in each part of structure, in most cases need some function stop running of equipping, this maintenance to equipment is very uneconomic.After shortcoming that can only off-line is used, testing process is long causes these methods can not meet accident, find out rapidly configuration state, the requirement of decision-making foundation is provided in time as maintenance support.Therefore, in the urgent need to developing new Non-Destructive Testing theory and method, the plate-shape metal structure failure detects and the demand of early warning to adapt to.
Acoustic emission (Acoustic Emission, be called for short AE) refers to that the material part sends the phenomenon of Elastic wave because of the quick release of energy.Acoustic emission signal comes from damage itself, therefore it carries the information of inside configuration lesion development, utilize certain means (as element) that the elastic wave that acoustic emission source produces is converted to electric signal, by these electric signal are analyzed just and can be obtained the information relevant with acoustic emission source, as position, type and the order of severity etc., the damage check of implementation structure.In general, microscopic damage in structure, occurs but before not yet forming macroscopic failure, acoustic emission phenomenon is just apparent in view, therefore, this method has very high detection sensitivity.With other lossless detection methods, compare, acoustic emission testing technology has potential advantage at aspects such as dynamic damage monitoring and location: signal derives from detected object itself, is suitable as a kind of dynamic assessment method detected object is carried out to dynamic evaluation and real-time diagnosis; The acoustic emission detection method is better to the practicality of detected object, it to checked object near less demanding, insensitive to the geometric configuration of object simultaneously; The broad covered area detected, in the single test process, only need to arrange the sensor of sufficient amount, and acoustic emission examination just can the whole state of surveying and estimating active defect in total.
The source location technology is one of key problem of acoustic emission research, and its accurate positioning degree (matching degree that namely reflects sound Sources Detection position and actual position) is the key technical indexes of source location technology.At present, based on difference time of arrival location acoustic emission source, be the Main Means of acoustic current emission location, also obtained under study for action good locating effect.But the positioning precision of time-of-arrival loaction can be subject to the factor impacts such as noise, frequency dispersion effect, energy attenuation in communication process, to having relatively high expectations of time of arrival, and in two dimension or three-dimensional big-and-middle-sized structure, adopt time-of-arrival loaction generally need to, by the sparse layout of sensor, may bring inconvenience to implementing.Beam-forming schemes is based on a kind of array signal processing method of Microphone array measurement, is widely used in fields such as communication, sonar, Noise Sources Identification, radar and seismic prospectings.Beam-forming schemes has larger advantage with respect to time-of-arrival loaction aspect the target source location such as communication, noise, and for example the sensor arrangement convenience, be subjected to the impact of channel damping capacity little, can be simultaneously to many auditory localizations etc.
The beam-forming schemes principle as shown in Figure 1, employing is measured the space sound field by the array that one group of microphone distributed on the fixed position, space forms, by the signal that the microphone on each fixed position records, process, to obtain detailed sound source information.
When array focused on the point sound source at limited distance place, incident acoustic wave was spherical wave, as shown in Figure 1.
Array output:
b ( r → , t ) = 1 M Σ m = 1 M w m x m ( t - Δ m ( r → ) ) - - - ( 1 )
Wherein M is the number of sensor, w mThe weighting coefficient of m sensor passage, x m(t) be m the signal that sensor records.
Figure BDA00003546721300022
For working as, focus on During loca, m sensor is with respect to the time delay of reference point.For target source, signal before addition,
Figure BDA00003546721300024
Can make signal adjust to same wavefront, and signal can not adjusted to same wavefront while focusing on other.
Geometric relationship can obtain in Fig. 1
Δ m ( r → ) = | r → | - | r → - r → m | c - - - ( 2 )
Figure BDA00003546721300026
For reference point arrives the focus point displacement,
Figure BDA00003546721300027
The displacement of reference point to m microphone,
Figure BDA00003546721300028
Be reference point arrive focus point the distance with m microphone to the focus point range difference, c is acoustic wave propagation velocity.
Beam-forming schemes supposes that in position fixing process in structure, acoustic emission wave is propagated with a constant speed, yet due to the impact that is subject to the aspects such as frequency dispersion, multi-modal, reflection, decay, velocity of wave can change, thereby directly affects the acoustic emission source positioning precision.And beam-forming schemes is subjected to the impact of velocity variations less at the sensor array column direction, and positioning precision is higher, positioning precision is poor in the sensor vertical direction.Given this, the present invention proposes a kind of acoustic emission source locating method without velocity of wave based on alliteration emission sensor array and wave beam formation, with respect to the single linear array of tradition, two arrays all have higher positioning precision on array direction and orthogonal array direction, and be easy to arrange sensor placement, and allow to adopt lower sampling rate, thereby more convenient, reliable and economical and practical.
Summary of the invention
1, purpose of the present invention
Time-of-arrival loaction is the main method of acoustic current emissive source location, can locate comparatively accurately the sound source in zone to be measured, but decayed, the impact of the characteristic such as frequency dispersion, time-of-arrival loaction sharply descends to the auditory localization precision that departs from central area, and time-of-arrival loaction to be subject to the impact of velocity error larger.In order to address this problem, the present invention proposes a kind of acoustic emission source locating method without velocity of wave based on alliteration emission sensor array and wave beam formation.Alliteration emission sensor array is adopted in this method design, utilizes wave beam to form this signal processing method, under the prerequisite without velocity of wave, realizes the accurate location to the structural damage acoustic emission source.
2, technical scheme
In order to solve above-mentioned technical matters, a kind of acoustic emission source locating method without velocity of wave based on alliteration emission sensor array and wave beam formation of the present invention, particular flow sheet as shown in Figure 1, comprises the following steps:
Step 1: in platy structure to be monitored, respectively arrange a voice sending sensor array along length and Width, described voice sending sensor array comprises 4～8 calibrate AE sensors.Can arrange arbitrarily coordinate system, but the application's recommendation is usingd length direction voice sending sensor array direction as X-axis, usings Width voice sending sensor array as Y-axis, the two intersection point is initial point, sets up coordinate system.Spacing in two voice sending sensor arrays between neighboring sensors all is greater than half wavelength at least;
Step 2: the calibrate AE sensor in the acoustic emission signal detection system is connected with the acoustic emission signal Acquisition Instrument by front-end amplifier;
Step 3: switch on power, open the acoustic emission signal Acquisition Instrument, whether the plumbous experiment of then breaking on platy structure to be measured, observe each passage waveform and normally show; If normally carry out data acquisition;
Step 4: the acoustic emission signal respectively length direction voice sending sensor array and Width voice sending sensor array collected is carried out wave beam formation;
Step 5: the X coordinate of the sound emission source signal that length direction voice sending sensor array is definite is as the acoustic emission source horizontal coordinate of orienting, and the Y coordinate of the sound emission source signal that Width voice sending sensor array is definite is as the acoustic emission source vertical coordinate of orienting.
Wherein, at " platy structure " described in step 1, refer to that thickness is significantly less than the geometry of length and width; " calibrate AE sensor " is piezoelectric resonant sensors.The signal testing array that the voice sending sensor array is comprised of several calibrate AE sensors, its arrangement mode are straight line;
Wherein, in step 2 described " acoustic emission signal detection system ", formed by front-end amplifier, acoustic emission signal Acquisition Instrument, computing machine.Described front-end amplifier function be to the calibrate AE sensor array test to acoustic emission signal carry out power amplification; The acoustic emission test instrument that described acoustic emission signal Acquisition Instrument is conventional use.
Wherein, in " the disconnected plumbous experiment " described in step 3, be that the employing diameter is the 2H graphite pencil core of 0.3mm or 0.5mm, with platy structure surface to be monitored, be 30 ° of left and right angles, inclination fractures;
Wherein, at " the length direction voice sending sensor array " described in step 4, be one group of sensor along the length direction linear distribution of platy structure to be monitored; " Width voice sending sensor array " is one group of sensor along the Width linear distribution of platy structure to be monitored; " wave beam formation " is a kind of acoustic emission source locating method of routine;
Wherein, at " the length direction voice sending sensor array " described in step 5, be one group of sensor along the length direction linear distribution of platy structure to be monitored; " Width voice sending sensor array " is one group of sensor along the Width linear distribution of platy structure to be monitored.
Ultimate principle of the present invention is: adopt beam-forming schemes to position acoustic emission source, its principle as shown in Figure 1.Beam-forming schemes for the acoustic emission source location has directive property feature clearly, insensitive to velocity variations along array direction, has very high positioning precision, and speed dependence is extremely strong in the array vertical direction, and positioning precision is very poor.For this reason, we are based on this characteristic, first at tested tabular body structure surface, respectively arrange an even straight line voice sending sensor array along the horizontal and vertical direction, and using horizontal linear voice sending sensor array direction as X-axis, using vertical direction straight line voice sending sensor array as Y-axis, the two intersection point is initial point, sets up coordinate system.By this two row linear array, can pick up the acoustic emission signal that the acoustic emission source in investigative range discharges.Then by two array tests to signal be respectively used to wave beam and form.The even straight line voice sending sensor array that along continuous straight runs is arranged can be oriented the directions X coordinate of acoustic emission source in the sensor array coordinate system accurately; By the even straight line voice sending sensor array of vertically arranging, can orient accurately the Y-direction coordinate of acoustic emission source in the sensor array coordinate system simultaneously.By the two combination, be the accurate coordinate of acoustic emission source in the sensor array coordinate system.The inventive method has overcome the dependence of traditional beam-forming schemes to speed, directly adopt the signal by the test of horizontal and vertical direction to carry out respectively wave beam formation, its position fixing process, without velocity of wave, is conducive to promote the promotion and application of acoustic emission testing technology in construction damage positioning.
3, the invention has the advantages that:
(1) implementation method of the present invention is simple, just can realize the acoustic emission source location without the acoustic emission signal due in equivalent damage characteristic parameter of processing or calculating in signal;
(2) the inventive method is due to without velocity of wave, and positioning precision is very high and stable;
(3) the inventive method has overcome single straight line sensing array beams and has formed the dependence to speed, all insensitive to velocity variations in array horizontal and vertical direction, has very high positioning precision;
(4) the inventive method can realize Real-Time Monitoring and the location to acoustic emission source in platy structure;
(5) the inventive method can realize the large regional acoustic emission source of platy structure location.
The accompanying drawing explanation
Below reading, to the detailed description of exemplary embodiment of the present invention, consider by reference to the accompanying drawings simultaneously, the above embodiment of the present invention and other embodiment, purpose, characteristic, advantage, technical and industrial meaning will better be understood, wherein:
Fig. 1 is wave beam formation figure
Fig. 2 is the process flow diagram of the method for the invention
Fig. 3 is disconnected plumbous experiment schematic diagram
Fig. 4 is the acoustic emission signal time domain waveform figure that in Fig. 3, in horizontal acoustic emission sensor array, a sensor collects
Fig. 5 is the acoustic emission signal time domain waveform figure that in Fig. 3, in vertical voice sending sensor array, a sensor collects
Sequence number in figure, symbol description are as follows:
1-simulated sound source position, 2-horizontal direction straight line sensor array, 3-vertical direction straight line sensor array, 4-steel plate, 5-front-end amplifier, 6-acoustic emission signal Acquisition Instrument, 7-computing machine
Embodiment
In the following description, will describe the present invention in detail according to exemplary embodiment.
As shown in Figure 3, wherein structure to be monitored be each to uniform steel plate, be of a size of 500mm * 500mm * 5mm, adopt the generation of mode simulated sound emission disconnected plumbous on steel plate.
This example comprises the following steps:
As shown in Figure 2, be the process flow diagram of the method for the invention.Below each concrete implementation step all according to this figure, implement.
Step 1: as shown in Figure 3, along continuous straight runs is arranged horizontal direction straight line sensor array 2 in steel plate to be monitored 4, vertically arranges vertical direction voice sending sensor array 3.Described voice sending sensor array comprises that 4～8 sound send out sensor.Using horizontal linear voice sending sensor array direction as X-axis, using vertical direction straight line voice sending sensor array as Y-axis, the two intersection point is initial point, sets up coordinate system.Spacing in two voice sending sensor arrays between neighboring sensors all is greater than half wavelength at least.Each acoustic emission source coordinate is in Table lattice 1
Form 1 each acoustic emission dummy source coordinate
Figure BDA00003546721300051
Step 2: the calibrate AE sensor in the acoustic emission signal detection system is connected with acoustic emission signal Acquisition Instrument 6 by front-end amplifier 5;
Step 3: switch on power, open computing machine 7, the acquisition software correlation parameter is set, the plumbous experiment of then breaking on steel plate to be monitored 4.Disconnected plumbous position is positioned at simulated sound source position 1 shown in Figure 3.Horizontal acoustic is transferred to acoustic emission signal Acquisition Instrument 6 after launching sensor array 2 and the acoustic emission signal that vertical voice sending sensor array 3 collects being carried out power amplification via front-end amplifier 5; Whether each passage waveform of observing acoustic emission signal Acquisition Instrument 6 normally shows; If normally carry out data acquisition; Fig. 4 and Fig. 5 are respectively the acoustic emission signal time domain waveform figure that in acoustic emission signal time domain waveform figure that in horizontal acoustic emission sensor array, a sensor collects and vertical voice sending sensor array, a sensor collects;
Step 4: respectively the acoustic emission signal that horizontal direction straight line sensor array 1 and vertical direction voice sending sensor array 2 collect is carried out to wave beam formation according to beam-forming schemes shown in Figure 1;
Step 5: the X coordinate of the sound emission source signal that horizontal direction straight line sensor array 1 is definite is as the acoustic emission source horizontal coordinate of orienting, using the Y coordinate of vertical direction voice sending sensor array 2 as the acoustic emission source vertical coordinate of orienting, each acoustic emission source positioning result as shown in Table 2;
Wherein, at " platy structure " described in step 1, refer to that thickness is significantly less than the geometry of length and width; " calibrate AE sensor " is piezoelectric resonant sensors.The signal testing array that the voice sending sensor array is comprised of several calibrate AE sensors, its arrangement mode are straight line;
Wherein, in " the acoustic emission signal detection system " described in step 2, formed by front-end amplifier, acoustic emission signal Acquisition Instrument, computing machine.Described front-end amplifier function be to the calibrate AE sensor array test to acoustic emission signal carry out power amplification; The acoustic emission test instrument that described acoustic emission signal Acquisition Instrument is conventional use.
Wherein, in " the disconnected plumbous experiment " described in step 3, be that the employing diameter is the 2H graphite pencil core of 0.3mm or 0.5mm, with platy structure surface to be monitored, be 30 ° of left and right angles, inclination fractures;
Wherein, at " the length direction voice sending sensor array " described in step 4, be one group of sensor along the length direction linear distribution of platy structure to be monitored; " Width voice sending sensor array " is one group of sensor along the Width linear distribution of platy structure to be monitored; " wave beam formation " is a kind of acoustic emission source locating method of the art routine;
Wherein, at " the length direction voice sending sensor array " described in step 5, be one group of sensor along the length direction linear distribution of platy structure to be monitored; " Width voice sending sensor array " is one group of sensor along the Width linear distribution of platy structure to be monitored.
Form 2 each acoustic emission source positioning results
Figure BDA00003546721300061
Figure BDA00003546721300071

Claims (8)

1. acoustic emission source locating method without velocity of wave formed based on alliteration emission sensor array and wave beam, it is characterized in that: it comprises the following steps:
Step 1: in platy structure to be monitored, respectively arrange a voice sending sensor array along length and Width, described voice sending sensor array comprises 4～8 calibrate AE sensors; Using length direction voice sending sensor array direction as X-axis, using Width voice sending sensor array as Y-axis, the two intersection point is initial point, sets up coordinate system; Spacing in two voice sending sensor arrays between neighboring sensors all is greater than half wavelength at least;
Step 2: the calibrate AE sensor in the acoustic emission signal detection system is connected with the acoustic emission signal Acquisition Instrument by front-end amplifier;
Step 3: switch on power, open the acoustic emission signal Acquisition Instrument, whether the plumbous experiment of then breaking on platy structure to be measured, observe each passage waveform and normally show; If normally carry out data acquisition;
Step 4: the acoustic emission signal respectively length direction voice sending sensor array and Width voice sending sensor array collected is carried out wave beam formation;
Step 5: the X coordinate of the sound emission source signal that length direction voice sending sensor array is definite is as the acoustic emission source horizontal coordinate of orienting, and the Y coordinate of the sound emission source signal that Width voice sending sensor array is definite is as the acoustic emission source vertical coordinate of orienting.
2. a kind of acoustic emission source locating method without velocity of wave based on alliteration emission sensor array and wave beam formation according to claim 1, is characterized in that: refer to that at " platy structure " described in step 1, three thickness is significantly less than the geometry of length and width.
3. a kind of acoustic emission source locating method without velocity of wave based on alliteration emission sensor array and wave beam formation according to claim 1, is characterized in that: be piezoelectric resonant sensors at " calibrate AE sensor " described in step 1; The signal testing array that described " voice sending sensor array " is comprised of a plurality of calibrate AE sensors, its arrangement mode is straight line.
4. a kind of acoustic emission source locating method without velocity of wave based on alliteration emission sensor array and wave beam formation according to claim 1, is characterized in that: be comprised of front-end amplifier, acoustic emission signal Acquisition Instrument, computing machine in " the acoustic emission signal detection system " described in step 2; This front-end amplifier function be to the calibrate AE sensor array test to acoustic emission signal carry out power amplification; The acoustic emission test instrument that this acoustic emission signal Acquisition Instrument is conventional use.
5. a kind of acoustic emission source locating method without velocity of wave formed based on alliteration emission sensor array and wave beam according to claim 1, it is characterized in that: in " the disconnected plumbous experiment " described in step 3, that the employing diameter is the 2H graphite pencil core of 0.3mm, with platy structure surface to be monitored, be 30 ° of left and right angles, inclination fractures.
6. a kind of acoustic emission source locating method without velocity of wave formed based on alliteration emission sensor array and wave beam according to claim 1, it is characterized in that: in " the disconnected plumbous experiment " described in step 3, that the employing diameter is the 2H graphite pencil core of 0.5mm, with platy structure surface to be monitored, be 30 ° of left and right angles, inclination fractures.
7. a kind of acoustic emission source locating method without velocity of wave formed based on alliteration emission sensor array and wave beam according to claim 1, it is characterized in that: at " the length direction voice sending sensor array " described in step 4, be one group of sensor along the length direction linear distribution of platy structure to be monitored; " Width voice sending sensor array " is one group of sensor along the Width linear distribution of platy structure to be monitored; " wave beam formation " is a kind of acoustic emission source locating method.
8. a kind of acoustic emission source locating method without velocity of wave formed based on alliteration emission sensor array and wave beam according to claim 1, it is characterized in that: at " the length direction voice sending sensor array " described in step 5, be one group of sensor along the length direction linear distribution of platy structure to be monitored; " Width voice sending sensor array " is one group of sensor along the Width linear distribution of platy structure to be monitored.
CN201310308631.5A 2013-07-22 2013-07-22 A kind of acoustic emission source locating method without the need to velocity of wave of launching sensor array and Wave beam forming based on alliteration Expired - Fee Related CN103412053B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310308631.5A CN103412053B (en) 2013-07-22 2013-07-22 A kind of acoustic emission source locating method without the need to velocity of wave of launching sensor array and Wave beam forming based on alliteration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310308631.5A CN103412053B (en) 2013-07-22 2013-07-22 A kind of acoustic emission source locating method without the need to velocity of wave of launching sensor array and Wave beam forming based on alliteration

Publications (2)

Publication Number Publication Date
CN103412053A true CN103412053A (en) 2013-11-27
CN103412053B CN103412053B (en) 2015-11-18

Family

ID=49605079

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310308631.5A Expired - Fee Related CN103412053B (en) 2013-07-22 2013-07-22 A kind of acoustic emission source locating method without the need to velocity of wave of launching sensor array and Wave beam forming based on alliteration

Country Status (1)

Country Link
CN (1) CN103412053B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105911139A (en) * 2016-04-11 2016-08-31 南通筑升土木工程科技有限责任公司 Apparatus for nondestructive detection of underline structure of high speed railway
CN106500925A (en) * 2016-10-25 2017-03-15 云南电网有限责任公司电力科学研究院 A kind of detecting system of GIS device gas leakage, device and method
CN106706760A (en) * 2016-12-20 2017-05-24 北京工业大学 Acoustic emission source positioning method of composite material plate of omnidirectional dual circular array
CN106842127A (en) * 2017-01-12 2017-06-13 天津大学 A kind of double-arm nonopiate sensor array based on Beamforming Method
CN110508659A (en) * 2019-08-28 2019-11-29 四川大学 A kind of skin drawing on-line detection device of defects
CN112946085A (en) * 2021-01-29 2021-06-11 中国人民解放军陆军勤务学院 Ultrasonic positioning method for plate-shaped structure damage sound source

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985024A (en) * 1975-02-28 1976-10-12 Grumman Corporation Acoustic emission process and system for improved flaw source location
US6009045A (en) * 1998-08-13 1999-12-28 The United States Of America As Represented By The Secretary Of The Navy Advanced vertical array beamformer
CN1720007A (en) * 2002-10-09 2006-01-11 松下电器产业株式会社 Ultrasonic diagnosing device
CN101295017A (en) * 2008-06-13 2008-10-29 清华大学 Method for acquiring moving sound field video based on well-regulated sound array and binocular vision
CN101806882A (en) * 2010-03-11 2010-08-18 沈阳化工学院 Locating method of emitting source
CN101907707A (en) * 2010-07-02 2010-12-08 哈尔滨工程大学 Combined acoustic array for multi-beam synthetic aperture sonar
CN102645484A (en) * 2012-05-09 2012-08-22 天津工业大学 Electromagnetic acoustic emission nondestructive testing device for metal materials
CN102661998A (en) * 2012-05-30 2012-09-12 天津工业大学 Electromagnetic acoustic emission nondestructive detection method of metal thin board and device thereof
CN102928818A (en) * 2012-10-18 2013-02-13 东南大学 Method for positioning rubbing sound emission source based on near field beam forming

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985024A (en) * 1975-02-28 1976-10-12 Grumman Corporation Acoustic emission process and system for improved flaw source location
US6009045A (en) * 1998-08-13 1999-12-28 The United States Of America As Represented By The Secretary Of The Navy Advanced vertical array beamformer
CN1720007A (en) * 2002-10-09 2006-01-11 松下电器产业株式会社 Ultrasonic diagnosing device
CN101295017A (en) * 2008-06-13 2008-10-29 清华大学 Method for acquiring moving sound field video based on well-regulated sound array and binocular vision
CN101806882A (en) * 2010-03-11 2010-08-18 沈阳化工学院 Locating method of emitting source
CN101907707A (en) * 2010-07-02 2010-12-08 哈尔滨工程大学 Combined acoustic array for multi-beam synthetic aperture sonar
CN102645484A (en) * 2012-05-09 2012-08-22 天津工业大学 Electromagnetic acoustic emission nondestructive testing device for metal materials
CN102661998A (en) * 2012-05-30 2012-09-12 天津工业大学 Electromagnetic acoustic emission nondestructive detection method of metal thin board and device thereof
CN102928818A (en) * 2012-10-18 2013-02-13 东南大学 Method for positioning rubbing sound emission source based on near field beam forming

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
GREGORY C.MCLASKEY ET AL.: "Beamforming array techniques for acoustic emission monitoring of large concrete structures", 《JOURNAL OF SOUNDAND VIBRATION》 *
TIAN HE ET AL.: "Near-field beamforming analysis for acoustic emission source localization", 《ULTRASONICS》 *
何田 等: "基于近场波束形成法的声发射源定位研究", 《振动工程学报》 *
孙国豪 等: "圆形波导杆中两种情况下声信号的传播特性", 《华东理工大学学报(自然科学版)》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105911139A (en) * 2016-04-11 2016-08-31 南通筑升土木工程科技有限责任公司 Apparatus for nondestructive detection of underline structure of high speed railway
CN106500925A (en) * 2016-10-25 2017-03-15 云南电网有限责任公司电力科学研究院 A kind of detecting system of GIS device gas leakage, device and method
CN106706760A (en) * 2016-12-20 2017-05-24 北京工业大学 Acoustic emission source positioning method of composite material plate of omnidirectional dual circular array
CN106842127A (en) * 2017-01-12 2017-06-13 天津大学 A kind of double-arm nonopiate sensor array based on Beamforming Method
CN110508659A (en) * 2019-08-28 2019-11-29 四川大学 A kind of skin drawing on-line detection device of defects
CN112946085A (en) * 2021-01-29 2021-06-11 中国人民解放军陆军勤务学院 Ultrasonic positioning method for plate-shaped structure damage sound source
CN112946085B (en) * 2021-01-29 2024-06-21 中国人民解放军陆军勤务学院 Ultrasonic positioning method for plate-like structure damaged sound source

Also Published As

Publication number Publication date
CN103412053B (en) 2015-11-18

Similar Documents

Publication Publication Date Title
CN103412053B (en) A kind of acoustic emission source locating method without the need to velocity of wave of launching sensor array and Wave beam forming based on alliteration
CN111239256B (en) Acoustic emission source positioning method suitable for three-dimensional structure
CN107688051B (en) A kind of measurement method of the subsurface defect width based on Laser thermo-elastic generated surface acoustic waves
CN108459083B (en) A kind of detection system and its detection method for concrete dam
CN101943680B (en) Array ultrasonic flaw detection method and system with temperature compensation
CN105866252B (en) A method of for middle-size and small-size rectangular shape babinet acoustic emission source positioning
CN102636303A (en) Method for measuring residual stress of thin plating layer based on surface ultrasonic waves
CN110346453B (en) Method for rapidly detecting reflection echoes of small defect arrays in concrete structure
KR20190078608A (en) Arrays of acoustic transducers for physical analysis of batteries
Hassan et al. State-of-the-art review on the acoustic emission source localization techniques
CN105954356B (en) A kind of metal block closure crack detection localization method based on limited amplitude method
CN108519583A (en) Acoustic emission source locating method suitable for anisotropy two dimensional panel
CN106198739A (en) A kind of TOFD near surface blind region defect location detection method based on shape transformation
CN106706760A (en) Acoustic emission source positioning method of composite material plate of omnidirectional dual circular array
CN105424804A (en) Ultrasonic detecting method for defect of remanufactured composite part
CN101539540B (en) Ultrasonic guided wave testing method of corrosion of partially implanted pole body of steel pipe pole
CN104833323A (en) Method for measuring the width of laser lapping welding seam by using reflected echo of S0 mode lamb wave
CN104792865A (en) Recognizing and positioning method of small defects of pipelines through ultrasonic guided waves based on fractal dimensions
CN104374532A (en) Spacecraft ontrack leakage orientation method
CN102998369A (en) Quantitative monitoring method of dimensional damage
CN104730146A (en) Ultrasonic array composite imaging method for quantitative evaluation of plate structure cracks
CN103424475B (en) Based on the tested surface contour extraction method of phased array ultrasonic detection
CN105044215A (en) Non-destructive material sound velocity field measurement method
CN104777227A (en) Internal concrete defect detection method based on principles of three views
CA2908682A1 (en) Conical ultrasonic probe

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151118

Termination date: 20170722

CF01 Termination of patent right due to non-payment of annual fee