Phased array sector scanning reference sensitivity and the method to set up of angle gain compensationTechnical field
The present invention relates to the phased array ultrasonic detection in field of non destructive testing, and in particular to the spirit of phased array sector scanning benchmarkSensitivity and the method to set up of angle gain compensation.
Background technology
Bearing device includes various boilers, pressure vessel and pressure pipeline etc., belongs to important production equipment, with national economyProduction and people's daily life have very close contact.But bearing device often has high temperature, high pressure and poisonous mediumThe features such as, once accident occurs, consequence is extremely serious.To avoid the quality accident being likely to occur, bearing device is being manufactured, madeWith, examine etc. and to widely apply non-destructive testing technology in link.
Phased array ultrasonic detection technology is new direction, the new power of non-destructive testing technology development both at home and abroad at present, is at firstOne of non-destructive testing technology entered.Phased array supersonic technology is the acoustic beam using electronically control phased array supersonic probe come realExisting ultrasonic wave transmitting, the method received.Phased array supersonic probe chip is made up of multiple small chips, and each small chip is also known asArray element.Each array element can be excited by independent, and apply different time delays, and the ultrasonic waveform of all array element transmittings is into oneOverall wavefront, dynamic focusing can be realized, and shape and the direction of transmitting supersonic beam can be efficiently controlled.It is determination defectShape, size and Orientation provide the ability bigger than single or multiple conventional ultrasonic probes systems.Phased array supersonic is examinedSurvey technology has imaging function, and testing result is shown with image format, is divided into A sweep, B-scan, S scannings, E scanner unis P scanningsDeng visual and understandable, the data of storage have dynamic playback function, and can also record scanning position.These functions are conventional superSound detection technology is difficult to.
Phased array ultrasonic detection technology starts to apply in China, such as detects pipe ring in PipelineWeld seam, in Anhui six, peace and Anqing thermal power plant detection thin-walled small diameter tube girth joint, justify to turbine blade root and turbineThe detection of disk, train axle detection, the detection of nuclear power station main pump thermal insulation board etc., have huge application space, embody phaseControl the superiority of battle array ultrasound detection.
Phased array ultrasonic detection technology passes through in actually detected application sweeps frequently with sectoring technology and encoder recordLook into position to be detected, this detection mode advantage is obvious, i.e.,：(1) multiple angular sectors Scanning Detctions, scanning inspection are usedIt is big to survey scope, detection efficiency is high, speed is fast；(2) test position is recorded using encoder in real time；(3) record inspection in real time can be realizedSurvey result；(4) the detection image data of storage can be with dynamic playback.
But phased array supersonic carries out straight line using sectoring and encoder record scanning position parallel to bead directionThe detection mode of motion there is also it is fatal the shortcomings that, this shortcoming influence phased array ultrasonic detection technology application, i.e.,：
(1) there is saturation state in image wave amplitude during the detection data analysis of storage.
Often there is saturation state in image wave amplitude during the detection data analysis of storage.So-called wave amplitude saturation state is exactly wave heightAmplitude more than height all over the screen does not record, but the color of image shown is very deep, by the filter process of analysis software not, givesDefects assessment increases difficulty, can not be evaluated.The amplitude of phased array supersonic equipment height all over the screen is substantially both at home and abroad at present100%th, 220%, 260% and 800% etc., wave amplitude saturated phenomenon just occurs more than above-mentioned value.Image saturation state is examinedSensitivity is influenceed, and amplitude could be lowered by only changing sensitivity, could solve image saturation problem.Phased array supersonic equipmentAfter preserving detection data, change range of sensitivity very little in analysis, some equipment is only -6dB~+6dB, and some equipment is basicDo not allow to change, can not meet the requirement of defect analysis evaluation, can only again detect, increase testing cost, reduce detectionEfficiency.Because substantially by evaluation line, quantitative line and sentence scrap wire (areas of Ji An I, IIth area and IIIth area) when being detected using sectoringAssessment is carried out, wave amplitude is in saturation state and does not judge which area is defect be in, so can not be evaluated to defect.
(2) reference sensitivity and angle gain compensation are problematic when phased array supersonic is detected using sectoring.
The detection of phased array supersonic sectoring at present is essentially all using a reference sensitivity and an angular rangeAngle gain compensated curve be configured, be all that setting is detected simultaneously on a passage using primary wave and secondary wave, and show on an interface.This set easily causes reference sensitivity and angle gain compensates inaccurate, bigger than normal showAs detection sensitivity is higher when causing actually detected, and wave amplitude saturated phenomenon occur in the detection image data for easily causing collection.
Such as the weld seam that detection thickness is T=30mm is detected using phased array supersonic sectoring, using phased array probeParameter：Frequency is 5MHz, (array number n) is that 32 chips, two array element centreline spaces away from (p) are 0.5mm to chip number, and array element is wideDegree (e) is 0.4mm, and the gap (g) between two array elements is 0.1mm.16 (i.e. 9-24) individual chips are excited during detection, in RB-3 test blocksReference sensitivity and angle gain compensated curve are set.
Set and detected simultaneously using primary wave and secondary wave, fan angle range is 38 °~70 °, selection make away fromHole depth from-amplitude curve (i.e. TCG curves and DAC curves) is respectively 10mm, 20mmm, 30mm, 40mm, 50mm, 60mm.PointDistance-amplitude curve Cai Yong not be made at least three holes in this six holes, it is desirable to each angle in sectoring angular rangeWill scanning to these artificial reflectors.When detection is set, the hole of hole deep 10mm and 60mm depths is essential, and benchmark is sensitiveThe wave height of degree is the 80% of height all over the screen, and reference sensitivity is calibrated using hole deep 10mm.(1) refraction angle be 55 ° when, 10mmWhen deep hole reaches height 80% all over the screen, yield value 25dB, 60mm deep hole must also reach the 80% of height all over the screen, yield valueFor 41dB.The hole deep 10mm hole deep with 60mm differs 50mm in depth, the Δ dB values difference 16dB between them, addsBetween compensating for coupling 4dB~6dB, Δ dB value difference 20dB~22dB.(2) when being 70 ° at refraction angle, hole deep 10mm reaches fullDuring screen height 80%, yield value 37dB, 60mm deep hole reaches the 80% of height all over the screen, yield value 57.5dB.They itBetween Δ dB values difference 20.5dB, along with compensating for coupling 4dB~6dB, Δ dB values are differed between 24.5dB~26.5dB.
As can be seen here, Δ dB values difference is very big, is illustrated deep to 60mm using the deep hole calibration reference sensitivities of 10mmHole be problematic, inaccurate, and irrational.Because hole deep 10mm is in secondary wave detection zone, that is, weldingUpper position is stitched, is 40mm, 50mm and 60mm respectively in hole depth corresponding to this region, and uses the deep hole calibration benchmark spirits of 10mmSensitivity is irrational at a glance, it should which it is rational, effective to calibrate reference sensitivity using hole deep 40mm.Using 10mmDeep hole calibration reference sensitivity, again using the sectoring detection of a polarizers of big angle scope (i.e. 38 °~70 °), will also result inThe value of angle gain compensation is also bigger than normal, in turn results in that sensitivity compensation value is also big, and Δ dB value differences are bigger, noise signal is also increasingGreatly, signal to noise ratio reduces, and ultimately causes reference sensitivity and angle gain compensation is forbidden, phenomenon bigger than normal occurs, cause sector to sweepThere is the probability increase of amplitude saturation state in the detection image data for retouching collection.
The basic reason for above-mentioned phenomenon occur is that reference sensitivity and angle gain compensation setting are problematic, and one is selectionFirst hole depth of calibration reference sensitivity is problematic, and another problem is that sectoring angular range is too big.
The content of the invention
In order to overcome current phased array supersonic using reference sensitivity calibration during sectoring detection and angle gain compensationThe deficiency of method to set up, easily cause detection data image wave amplitude and saturation state occur, the phenomenon that defect can not be evaluated.The present invention proposes phased array sector scanning reference sensitivity and the method to set up of angle gain compensation.This method can be solved effectivelyReference sensitivity and the offering question of angle gain compensation, are commented for the analysis of testing result when sectoring is detected using encoderSurely lay the first stone, provided safeguard measure for phased array supersonic technology application.
Scheme is used by the present invention solves technical problem：
Phased array sector scanning reference sensitivity and angle gain compensation method to set up, be by phased array supersonic equipment withPhased array probe connects, and selects the sectoring software in equipment, by weld seam simulation softward by weld seam through-thickness decileInto several subregions, it is determined that sectoring angular range and used a few subwaves that each subregion each uses detect, pass throughThe artificial reflector corresponding with each subregion scope sets the side that reference sensitivity and angle gain compensate in reference blockMethod.
The function that described phased array supersonic equipment has includes：
(1) phased array supersonic equipment must be multi-path-apparatus, and have multinomial scanning function or subregion scanning function；
(2) phased array supersonic equipment has sectoring detection technique；
(3) phased array supersonic equipment has weld seam simulation softward function；
(4) phased array supersonic equipment has and is separately provided on different passages, and different set is included sameOn individual interface, and compensated with different reference sensitivities and angle gain；
(5) phased array supersonic equipment has the function that an exciting wafer number is more than or equal to 16 chips.
The chip number of described phased array supersonic probe have to be larger than equal to 16 chips, in the situation that satisfaction can penetrateUnder, the small probe of active aperture is selected as far as possible.
Described phased array ultrasonic detection reference sensitivity and the setting steps of angle gain compensation include：
The first step：Select phased array supersonic equipment；
Second step：Select phased array supersonic probe；
3rd step：After phased array supersonic equipment is connected with phased array probe, fan-shaped scanning software in equipment is selected；
4th step：Using weld seam simulation softward, weld seam through-thickness is divided into several subregions, it is determined that each subregionThe sectoring angular range each used and used a few subwave detections, it is specific as follows：
(1) thickness of workpiece is less than 5mm two subregions of weld seam decile, is detected using tertiary wave fan angle range in weld seamBottom subregion, weld seam middle and upper part subregion is detected using secondary wave fan angle range and four subwave fan angle ranges；
(2) thickness of workpiece is more than or equal to 5mm, two subregions of weld seam decile less than or equal to 7mm, using tertiary wave segment angleRange detection weld seam middle and lower part subregion is spent, weld seam middle and upper part subregion is detected using secondary wave fan angle range；
(3) thickness of workpiece is more than 7mm, two subregions of weld seam decile less than or equal to 120mm, using primary wave fan angleRange detection weld seam middle and lower part subregion, weld seam middle and upper part subregion is detected using secondary wave fan angle range；For narrow gapDuring the subregion of weld seam detection middle and upper part, the inspection of ripple fan angle range again and again is at least further added by the basis of original sectoringSurvey；
(4) thickness of workpiece is more than 120mm weld seam, using two-sided (i.e. the front and back of workpiece) primary wave sectoringDetection, weld seam through-thickness is divided into several subregions, but the oneself height of each subregion cannot be greater than 100mm, from welderingRoot subregion is stitched to capping subregion (i.e. top subregion, and last subregion), be arranged in order for the first subregion, second pointArea, the 3rd subregion ...；Each subregion is detected using primary wave fan angle range successively, for weld seam middle and upper part subregion(i.e. most latter two subregion) undetectable position of primary wave sectoring, in another side (i.e. back of work) and using sameSetting carry out primary wave sectoring detection.
5th step：Reference sensitivity is set using artificial reflector corresponding with each subregion scope in reference blockAnd angle gain compensation, it is specific as follows：
(1) setting of weld seam reference sensitivity of the thickness of workpiece less than 5mm and angle gain compensation
1) weld seam middle and lower part subregion is set：Determine manually to reflect corresponding to tertiary wave fan angle range in reference blockBody, three artificial reflectors are at least selected to make distance-amplitude curve and angle gain compensated curve, using the people of some depthWork reflector calibrates reference sensitivity, can also use the artificial reflector of some of depth bounds between 8mm~12mm to make angleSpend gain compensating curve；
2) weld seam middle and upper part subregion is set：
1. determining artificial reflector corresponding to secondary wave fan angle range in reference block, three are at least selected manuallyReflector makes distance-amplitude curve and angle gain compensated curve, and benchmark spirit is calibrated using the artificial reflector of some depthSensitivity, the artificial reflector of some of depth bounds between 5mm~8mm can be also used to make angle gain compensated curve；
2. determining artificial reflector corresponding to four subwave fan angle ranges in reference block, three are at least selected manuallyReflector makes distance-amplitude curve and angle gain compensated curve, and benchmark spirit is calibrated using the artificial reflector of some depthSensitivity, the artificial reflector of some of depth bounds between 9mm~13mm can be also used to make angle gain compensated curve.
(2) thickness of workpiece is more than or equal to setting for 5mm, the weld seam reference sensitivity less than or equal to 7mm and angle gain compensationPut
1) weld seam middle and lower part subregion is set：Its method to set up and the 5th step (1) article the 1st) money is identical, but makes angle and increaseBeneficial compensated curve can also use the artificial reflector of some of depth bounds between 11mm~15mm；
2) weld seam middle and upper part subregion is set：Its method to set up and the 5th step (1) article the 2nd) method of money 1. is identical, but makesThe artificial reflector of some of depth bounds between 8mm~11mm can also be used by making angle gain compensated curve；
(3) thickness of workpiece is more than 7mm, the weld seam reference sensitivity less than or equal to 120mm and angle gain compensation setting
1) weld seam middle and lower part subregion is set：Determine manually to reflect corresponding to primary wave fan angle range in reference blockBody, three artificial reflectors are at least selected to make distance-amplitude curve and angle gain compensated curve, using the people of some depthWork reflector calibrates reference sensitivity, and depth can also be respectively adopted according to detection parameters between (8~11) mm, (20~40) mmBetween and first calibration reference sensitivity artificial reflector make corresponding object angle gain compensated curve；
2) weld seam middle and upper part subregion is set：Determine manually to reflect corresponding to secondary wave fan angle range in reference blockBody, three artificial reflectors are at least selected to make distance-amplitude curve and angle gain compensated curve, using the people of some depthWork reflector calibrates reference sensitivity, and depth two people of certain between (15~35) mm can also be respectively adopted according to detection parametersWork reflector and the artificial reflector of first calibration reference sensitivity make the angle gain compensated curve of corresponding object；
3) set for the weld seam detection middle and upper part subregion of narrow gap：On the basis of original secondary wave sectoring at least againIncrease the detection of ripple fan angle range again and again, its preparation method is the determination primary wave fan angle model in reference blockArtificial reflector corresponding to enclosing detection narrow gap weld seam middle and upper part subregion, at least selects three artificial reflectors to make distance-rippleWidth curve and angle gain compensated curve, it can also use someone of the depth bounds between (8~11) mm or (20~50) mmWork reflector makes angle gain compensated curve；
(4) setting of weld seam reference sensitivity of the thickness of workpiece more than 120mm and angle gain compensation
1) the first subregion is set：When determining the first subregion of detection in reference block corresponding to primary wave fan angle rangeArtificial reflector, at least select three artificial reflectors to make distance-amplitude curves and angle gain compensated curve, but use theOne artificial reflector calibration reference sensitivity, can also use first man work reflector to make angle gain compensated curve；
2) method to set up such as the second subregion, the 3rd subregion and the 4th subregion is identical with the first subregion method to set up；
3) weld seam middle and upper part subregion (i.e. most latter two subregion) is set：Its method to set up is 1) and 2) identical with this, butWorkpiece another side (i.e. the back side) is detected.
The benchmark wave height of described phased array ultrasonic detection reference sensitivity is set as the 80%~100% of height all over the screen(being free of 100%).
The positive effect of the present invention is：Simple to operate, practical, novel and unique is radiationless, pollution-free, testing result withImage format shown, is visual and understandable, easy analyzing evaluation defect, and quantitative accuracy is high, is affected by human factors small, and leakage is commented and judged by accidentProbability it is low, detection efficiency is high.
Embodiment
Reference sensitivity and angle gain compensate the tight of method to set up when existing phased array supersonic is detected using sectoringWeight shortcoming, easily cause detection data image wave amplitude and saturation state occur, the phenomenon that defect can not be evaluated.The present invention carriesGo out reference sensitivity and angle gain when a kind of phased array supersonic sectoring simple to operate, practical detects welding point to mendThe method to set up repaid.
Detection method
What reference sensitivity and angle gain compensated during a kind of detection welding point for phased array supersonic sectoring setsMethod is put, is to be connected phased array supersonic equipment with phased array probe, the sectoring software in equipment is selected, by weld seam mouldIntend software and weld seam through-thickness be divided into several subregions, it is determined that sectoring angular range that each subregion each uses andUsed a few subwave detections, set benchmark clever by artificial reflector corresponding with each subregion scope in reference blockSensitivity and the method for angle gain compensation.
Embodiment 1：
Embodiment 1 is to detect the pipe girth joint that specification is Φ 32mm × 3.5mm, is examined using phased array supersonic sectoringReference sensitivity and the method to set up of angle gain compensation during survey, reference block are that (specification of test block is for PGD-1 test blocks：400mm(length) × 25mm (width) × 50mm (height), the radius of curvature of test block is 18mm, the horizontal through hole for having 10 a diameter of 2mm in test block,Horizontal via depth is respectively 3mm, 5mm, 7mm, 9mm, 12mm, 14mm, 16mm, 18mm, 20mm and 22mm)：
The first step：ISONIC-2009 phased array supersonic equipment is selected, it is 8 to excite grade, once excites 16 chips, 16The active aperture of individual chip is 16 × 0.4 (mm)+(16-1) × 0.1mm=7.9mm (following computational methods are identical)；
Second step：The special phased array supersonic probe of small diameter tube is selected, i.e.,：Chip number is 16 chips, frequency 7.5MHz,Adjacent two plates centreline space away from (P) is 0.5mm, wafer width (e) 0.4mm, gap (g) 0.1mm between adjacent chip, crystalline substancePlate curvature radius is 35mm, wedge angle is 39 °, the voussoir velocity of sound is 2337m/s, and voussoir radius of curvature is 16mm；
3rd step：After phased array supersonic equipment is connected with phased array probe, fan-shaped scanning software in equipment is selected；
4th step：Using weld seam simulation softward, groove definition is carried out to detected weld, determines probe distal end away from weld edgeDistance be 11mm, weld seam through-thickness is then divided into middle and upper part and the subregion of middle and lower part two from centre, it is determined that each pointHow area is detected, and is specifically：Using tertiary wave detection weld seam middle and lower part, tertiary wave fan angle range is 63 °~70 °；UsingSecondary wave detection weld seam middle and upper part, secondary wave fan angle range are 68 °~77 °；Using four subwaves detection weld seam middle and upper part, fourSubwave fan angle range is 52 °~64 °；
5th step：Reference sensitivity is set using artificial reflector corresponding with each subregion scope in reference blockAnd angle gain compensation, it is specifically：
(1) weld seam middle and lower part subregion is set
Using the setting of tertiary wave detection weld seam middle and lower part subregion on passage 1：Determined three times in PGD-1 reference blocksArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 5mm, 9mm and 12mm horizontal through hole；Make distance-rippleThe references angle of width curve (i.e. DAC curves) is 66 °, uses depth to calibrate reference sensitivity, benchmark wave height for 9mm horizontal through holeFor the 90% of height all over the screen, reference sensitivity value is 42dB；63 °~70 ° of angle gain is made using horizontal through hole deep 9mm to mendRepay curve；
(note 1：The depth value of the artificial reflector highly corresponding with subregion in reference block, it at least should be greater than being equal to and divideArea's height, that is to say, that subregion scope must be covered, can also exceed covering subregion scope, it is same as below.Note 2：For making TCGThe phased array supersonic equipment of curve, angle gain compensated curve is made using 5mm, 9mm and 12mm horizontal through hole, angle gain is mendedRepay curve in TCG curve procedures are made just and meanwhile make, it is same as below.)
(2) weld seam middle and upper part subregion is set
1) using the setting of secondary wave detection weld seam middle and upper part subregion on passage 2：Two are determined in PGD-1 reference blocksArtificial reflector corresponding to subwave fan angle range, i.e. depth are respectively 5mm, 7mm and 12mm horizontal through hole；Making distance-The references angle of amplitude curve (i.e. DAC curves) is 72 °, uses depth to calibrate reference sensitivity, reference wave for 7mm horizontal through holeThe 90% of a height of height all over the screen, reference sensitivity value are 44.5dB；68 °~77 ° of angle is made using horizontal through hole deep 7mm to increaseBeneficial compensated curve；
2) using the setting of four subwaves detection weld seam middle and upper part subregion on passage 3：Four are determined in PGD-1 reference blocksArtificial reflector corresponding to subwave fan angle range, i.e. depth are respectively 7mm, 9mm, 14mm and 16mm horizontal through hole；MakeThe references angle of distance-amplitude curve (i.e. DAC curves) is 58 °, uses depth to calibrate reference sensitivity for 9mm horizontal through hole,The 90% of a height of height all over the screen of reference wave, reference sensitivity value are 39.5dB；52 °~64 ° are made using horizontal through hole deep 12mmAngle gain compensated curve.
Embodiment 2：
Embodiment 2 is to detect the pipe girth joint that specification is Φ 42mm × 7mm, is detected using phased array supersonic sectoringWhen reference sensitivity and angle gain compensation method to set up, reference block is that (radius of curvature of test block is for PGD-2 test blocks22mm, remaining parameter are identical with PGD-1 test blocks in embodiment 1)：
The first step：ISONIC-2009 phased array supersonic equipment is selected, it is 8 to excite grade, once excites 16 chips, 16The active aperture of individual chip is 7.9mm；
Second step：The special phased array supersonic probe of small diameter tube is selected, i.e.,：Chip number is 16 chips, frequency 7.5MHz,Adjacent two plates centreline space away from (P) is 0.5mm, wafer width (e) 0.4mm, gap (g) 0.1mm between adjacent chip, crystalline substancePlate curvature radius is 35mm, wedge angle is 39 °, the voussoir velocity of sound is 2337m/s, and voussoir radius of curvature is 21mm；
3rd step：After phased array supersonic equipment is connected with phased array probe, fan-shaped scanning software in equipment is selected；
4th step：Using weld seam simulation softward, groove definition is carried out to detected weld, determines probe distal end away from weld edgeDistance be 11mm, weld seam through-thickness is then divided into middle and upper part and the subregion of middle and lower part two from centre, it is determined that each pointHow area is detected, and is specifically：Using tertiary wave detection weld seam middle and lower part, tertiary wave fan angle range is 49 °~56 °；UsingSecondary wave detection weld seam middle and upper part, secondary wave fan angle range are 54 °~71 °；
5th step：Reference sensitivity is set using artificial reflector corresponding with each subregion scope in reference blockAnd angle gain compensation, it is specifically：
(1) weld seam middle and lower part subregion is set
Using the setting of tertiary wave detection weld seam middle and lower part subregion on passage 1：Determined three times in PGD-2 reference blocksArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 9mm, 12mm, 18mm and 22mm horizontal through hole；Make away fromReferences angle from-amplitude curve (i.e. DAC curves) is 52 °, uses the horizontal through hole calibration reference sensitivity that depth is 9mm, baseThe 95% of a height of height all over the screen of quasi wave, reference sensitivity value are 41dB；49 °~56 ° of angle is made using horizontal through hole deep 12mmSpend gain compensating curve；
(2) weld seam middle and upper part subregion is set
Using the setting of secondary wave detection weld seam middle and upper part subregion on passage 2：Determined in PGD-2 reference blocks secondaryArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 9mm, 12mm and 16mm horizontal through hole；Make distance-rippleThe references angle of width curve (i.e. DAC curves) is 62 °, uses depth to calibrate reference sensitivity for 9mm horizontal through hole, quasi wave is a height ofThe 90% of height all over the screen, reference sensitivity value are 40dB；68 °~77 ° of angle gain is made using horizontal through hole deep 9mm to compensateCurve.
Embodiment 3：
Embodiment 3 is to detect the pipe girth joint that specification is Φ 51mm × 12.5mm, using phased array supersonic sectoringReference sensitivity and the method to set up of angle gain compensation during detection, reference block are that (radius of curvature of test block is for PGD-3 test blocks26mm, remaining parameter are identical with PGD-1 test blocks in embodiment 1)：
The first step：ISONIC-2009 phased array supersonic equipment is selected, it is 8 to excite grade, once excites 16 chips, 16The active aperture of individual chip is 7.9mm；
Second step：The special phased array supersonic probe of small diameter tube is selected, i.e.,：Chip number is 16 chips, frequency 7.5MHz,Adjacent two plates centreline space away from (P) is 0.5mm, wafer width (e) 0.4mm, gap (g) 0.1mm between adjacent chip, crystalline substancePlate curvature radius is 35mm, wedge angle is 39 °, the voussoir velocity of sound is 2337m/s, and voussoir radius of curvature is 25.5mm；
3rd step：After phased array supersonic equipment is connected with phased array probe, fan-shaped scanning software in equipment is selected；
4th step：Using weld seam simulation softward, groove definition is carried out to detected weld, determines probe distal end away from weld edgeDistance be 10mm, weld seam through-thickness is then divided into middle and upper part and the subregion of middle and lower part two from centre, it is determined that each pointHow area is detected, and is specifically：Using primary wave detection weld seam middle and lower part, primary wave fan angle range is 58 °~75 °；UsingSecondary wave detection weld seam middle and upper part, secondary wave fan angle range are 38 °~60 °；
5th step：Reference sensitivity is set using artificial reflector corresponding with each subregion scope in reference blockAnd angle gain compensation, it is specifically：
(1) weld seam middle and lower part subregion is set
Using the setting of primary wave detection weld seam middle and lower part subregion on passage 1：Determined once in PGD-3 reference blocksArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 6mm, 9mm, 14mm and 16mm horizontal through hole；Make away fromReferences angle from-amplitude curve (i.e. DAC curves) is 68 °, uses the horizontal through hole calibration reference sensitivity that depth is 9mm, baseThe 90% of a height of height all over the screen of quasi wave, reference sensitivity value are 42dB；58 °~75 ° of angle is made using horizontal through hole deep 9mmGain compensating curve；
(2) weld seam middle and upper part subregion is set
Using the setting of secondary wave detection weld seam middle and upper part subregion on passage 2：Determined in PGD-3 reference blocks secondaryArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 16mm, 18mm, 22mm, 28mm and 30mm horizontal through hole；The references angle for making distance-amplitude curve (i.e. DAC curves) is 48 °, uses depth to calibrate benchmark spirit for 16mm horizontal through holeSensitivity, the 80% of a height of height all over the screen of reference wave, reference sensitivity value is 39.5dB；38 ° are made using horizontal through hole deep 18mm~60 ° of angle gain compensated curve.
Embodiment 4：
Embodiment 4 is to detect the test plate (panel) weld seam that specification is 350mm × 280mm × 22mm, is swept using phased array supersonic sectorReference sensitivity and the method to set up of angle gain compensation when retouching detection, reference block are that (specification of test block is for PRB-2 test blocks：450mm (length) × 25mm (width) × 110mm (height), there is 5 a diameter of 2mm horizontal through hole in test block, between adjacent horizontal through hole is verticalAway from being respectively 10mm, 30mm, 50mm, 70mm and 90mm for 40mm, hole depth)：
The first step：ZETEC phased array supersonic equipment is selected, pulse voltage 75V, once excites 16 chips (i.e. 9~24),The active aperture of 16 chips is 7.9mm；
Second step：104379W36 models phased array supersonic probe is selected, parameter is：Chip number is 32 chips, and frequency is5MHz, adjacent two plates centreline space away from (P) are 0.5mm, wafer width (e) 0.4mm, the gap (g) between adjacent chip0.1mm, wedge angle are 36 °, the voussoir velocity of sound is 2337m/s, using plane voussoir；
3rd step：After phased array supersonic equipment is connected with phased array probe, fan-shaped scanning software in equipment is selected；
4th step：Using weld seam simulation softward, groove definition is carried out to detected weld, determines probe distal end away from weld edgeDistance be 16mm, weld seam through-thickness is then divided into middle and upper part and the subregion of middle and lower part two from centre, it is determined that each pointHow area is detected, and is specifically：Using primary wave detection weld seam middle and lower part, primary wave fan angle range is 55 °~75 °；UsingSecondary wave detection weld seam middle and upper part, secondary wave fan angle range are 40 °~55 °；
5th step：Reference sensitivity is set using artificial reflector corresponding with each subregion scope in reference blockAnd angle gain compensation, it is specifically：
(1) weld seam middle and lower part subregion is set
Using the setting of primary wave detection weld seam middle and lower part subregion on passage 1：Determined once in PRB-2 reference blocksArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 10mm, 20mm and 30mm horizontal through hole；Making distance-The references angle of amplitude curve (i.e. TCG curves) is 65 °, uses depth to calibrate reference sensitivity, benchmark for 10mm horizontal through holeWave height is the 80% of height all over the screen, and reference sensitivity value is 27.5dB；The deep horizontal through hole system of 10mm, 20mm and 30mm is respectively adoptedMake TCG curves and the angle gain compensated curve (note of 55 °~75 ° of making：Angle is made in TCG curve procedures are done while alsoSpend gain compensating curve)；
(2) weld seam middle and upper part subregion is set
Using the setting of secondary wave detection weld seam middle and upper part subregion on passage 2：Determined in PRB-2 reference blocks secondaryArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 30mm, 40mm and 50mm horizontal through hole；Making distance-The references angle of amplitude curve (i.e. TCG curves) is 45 °, uses depth to calibrate reference sensitivity, benchmark for 30mm horizontal through holeWave height is the 80% of height all over the screen, and reference sensitivity value is 35dB；The deep horizontal through hole of 30mm, 40mm and 50mm is respectively adopted to makeTCG curves and the angle gain compensated curve of 40 °~55 ° of making (note：Angle is made in TCG curve procedures are done while alsoGain compensating curve).
Embodiment 5：
Embodiment 5 is to detect the test plate (panel) weld seam that specification is 600mm × 500mm × 120mm, is swept using phased array supersonic sectorReference sensitivity and the method to set up of angle gain compensation when retouching detection, reference block are that (specification of test block is for PRB-3 test blocks：700mm (length) × 30mm (width) × 170mm (height), there is 8 a diameter of 2mm horizontal through hole in test block, between adjacent horizontal through hole is verticalAway from being respectively 10mm, 30mm, 50mm, 70mm, 90mm, 110mm, 130mm and 150mm for 40mm, hole depth)：
The first step：ISONIC-2009 phased array supersonic equipment is selected, it is 8 to excite grade；
Second step：Select phased array supersonic probe, using the phased array probe of two kinds of models, i.e., 105503W36 models and104379W36 models：
(1) 105503W36 models probe parameter：Chip number is 16 chips, frequency 2MHz, adjacent two plates center lineSpacing (P) is 1mm, gap (g) 0.1mm between wafer width (e) 0.9mm, adjacent chip, wedge angle are 36 °, voussoir soundSpeed is 2337m/s.
(2) 104379W36 models probe parameter：Chip number is 32 chips, frequency 5MHz, adjacent two plates center lineSpacing (P) is 0.5mm, gap (g) 0.1mm between wafer width (e) 0.4mm, adjacent chip, wedge angle are 36 °, voussoirThe velocity of sound is 2337m/s, using plane voussoir.
3rd step：After phased array supersonic equipment is connected with phased array probe, fan-shaped scanning software in equipment is selected；
4th step：Using weld seam simulation softward, groove definition is carried out to detected weld, determines probe distal end away from weld edgeDistance be 150mm, weld seam through-thickness is then divided into middle and upper part and the subregion of middle and lower part two from centre, it is determined that each pointHow area is detected, and is specifically：
(1) it is 57 °~72 ° using primary wave detection weld seam middle and lower part, primary wave fan angle range；Examined using secondary waveWeld seam middle and upper part is surveyed, secondary wave fan angle range is 40 °~56 °；It is configured using 105503W36 models probe, once16 chips are excited, the active aperture of 16 chips is 15.9mm.
(2) because the weld seam belongs to narrow gap weld seam, the detection of primary wave sectoring twice should be increased, set carry out respectivelyScanning, i.e.,：Distance of the probe distal end away from weld edge is 5mm, and primary wave fan angle range is 55 °~75 °；Probe distal end away fromThe distance of weld edge is 30mm, and primary wave fan angle range is 46 °~66 °；Set using 104379W36 models probePut, once excite 16 chips, the active aperture of 16 chips is 7.9mm.
5th step：Reference sensitivity is set using artificial reflector corresponding with each subregion scope in reference blockAnd angle gain compensation, it is specifically：
(1) weld seam middle and lower part subregion is set
Using the setting of primary wave detection weld seam middle and lower part subregion on passage 1：Determined once in PRB-3 reference blocksArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 70mm, 90mm and 120mm horizontal through hole；Once excite16 chips, the references angle for making distance-amplitude curve (i.e. DAC curves) is 65 °, uses horizontal through hole school of the depth for 70mmQuasi- reference sensitivity, the 80% of a height of height all over the screen of reference wave, reference sensitivity value is 49.5dB；Using the horizontal through hole that 70mm is deepMake 58 °~72 ° of angle gain compensated curve.
(2) weld seam middle and upper part subregion is set
1) using the setting of secondary wave detection weld seam middle and upper part subregion on passage 2：Two are determined in PRB-3 reference blocksArtificial reflector corresponding to subwave fan angle range, i.e. depth are respectively 160mm, 200mm and 240mm horizontal through hole；Once16 chips are excited, the references angle for making distance-amplitude curve (i.e. DAC curves) is 48 °, uses horizontal stroke of the depth for 160mmThrough hole calibration reference sensitivity, the 80% of a height of height all over the screen of reference wave, reference sensitivity value is 46dB；Deep using 160mmHorizontal through hole makes 38 °~55 ° of angle gain compensated curve.
2) narrow gap weld seam increase primary wave detection twice is set
1. it is separately provided using primary wave detection weld seam middle and upper part subregion：Determined once in PRB-3 reference blocksArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 10mm, 20mm and 30mm horizontal through hole；Once excite 16Individual chip (i.e. 9~24), the references angle for making distance-amplitude curve (i.e. DAC curves) is 65 °, uses depth as 10mm'sHorizontal through hole calibration reference sensitivity, the 80% of a height of height all over the screen of reference wave, reference sensitivity value is 40dB；Deep using 30mmHorizontal through hole makes 55 °~75 ° of angle gain compensated curve.
2. it is separately provided using primary wave detection weld seam middle and upper part subregion：Determined once in PRB-3 reference blocksArtificial reflector corresponding to ripple fan angle range, i.e. depth are respectively 30mm, 40mm and 60mm horizontal through hole；Once excite 16Individual chip (i.e. 9~24), the references angle for making distance-amplitude curve (i.e. DAC curves) is 56 °, uses depth as 30mm'sHorizontal through hole calibration reference sensitivity, the 80% of a height of height all over the screen of reference wave, reference sensitivity value is 37.5dB；It is deep using 30mmHorizontal through hole make 46 °~66 ° of angle gain compensated curve.
Embodiment 6：
Embodiment 6 is to detect the test plate (panel) weld seam that specification is 600mm × 500mm × 300mm, is swept using phased array supersonic sectorReference sensitivity and the method to set up of angle gain compensation when retouching detection, reference block are that (specification of test block is for PRB-7 test blocks：700mm (length) × 30mm (width) × 210mm (height), there is 10 a diameter of 11.1mm horizontal through hole in test block, and adjacent horizontal through hole hangs downStraight spacing is 40mm, hole depth be respectively 10mm, 30mm, 50mm, 70mm, 90mm, 110mm, 130mm, 150mm, 170mm and190mm)：
The first step：ISONIC-2009 phased array supersonic equipment is selected, it is 8 to excite grade, once excites 16 chips, 16The active aperture of individual chip is 15.9mm；
Second step：105503W36 models phased array supersonic probe is selected, parameter is：Chip number is 16 chips, and frequency is2MHz, adjacent two plates centreline space away from (P) are 1mm, wafer width (e) 0.9mm, the gap (g) between adjacent chip0.1mm, wedge angle are 36 °, the voussoir velocity of sound is 2337m/s, using plane voussoir；
3rd step：After phased array supersonic equipment is connected with phased array probe, fan-shaped scanning software in equipment is selected；
4th step：Using weld seam simulation softward, groove definition is carried out to detected weld, determines probe distal end away from weld edgeDistance be 200mm, using two-sided primary wave sectoring detect, then by weld seam through-thickness trisection, i.e., first pointArea is root of weld subregion, the second subregion is middle part subregion, the 3rd subregion is top subregion, it is determined that how each subregion detects,Specifically：The subregion of weld seam first is detected using primary wave, primary wave fan angle range is 35 °~55 °；Detected using primary waveThe subregion of weld seam second, primary wave fan angle range are 53 °~68 °；Test plate (panel) is similarly turned into (i.e. in back of work), adoptedWith same setting detection weld seam top subregion and middle part subregion；
5th step：Reference sensitivity is set using artificial reflector corresponding with each subregion scope in reference blockAnd angle gain compensation, it is specifically：
(1) first subregion (i.e. root of weld subregion) is set
Using the setting of primary wave detection root of weld subregion on passage 1：Primary wave is determined in PRB-7 reference blocksArtificial reflector corresponding to fan angle range, i.e. depth are respectively 190mm, 270mm and 310mm horizontal through hole；Once excite16 chips, the references angle for making distance-amplitude curve (i.e. DAC curves) is 45 °, uses horizontal through hole of the depth for 190mmCalibration reference sensitivity, the 80% of a height of height all over the screen of reference wave, reference sensitivity value is 44dB；Using the horizontal logical of 190mm depthsHole makes 35 °~55 ° of angle gain compensated curve；
(2) second subregions (i.e. subregion in the middle part of weld seam) are set
Using the setting of subregion in the middle part of primary wave detection weld seam on passage 2：Primary wave is determined in PRB-7 reference blocksArtificial reflector corresponding to fan angle range, i.e. depth are respectively 100mm, 140mm and 200mm horizontal through hole；Once excite16 chips, the references angle for making distance-amplitude curve (i.e. DAC curves) is 60 °, uses horizontal through hole of the depth for 100mmCalibration reference sensitivity, the 80% of a height of height all over the screen of reference wave, reference sensitivity value is 42.5dB；Using the horizontal stroke that 100mm is deepThrough hole makes 53 °~68 ° of angle gain compensated curve.
(3) the 3rd subregions (weld seam top subregion) are set
Test plate (panel) is similarly turned into (i.e. in back of work), weld seam top subregion and middle part are detected using same settingSubregion.
The characteristics of detection method：
(1) the inventive method proposes to set phased array sector scanning reference sensitivity and angle gain using zone method firstThe method of compensation, for solve the problems, such as analyze data storage when picture amplitude saturation lay the first stone, reduce to Analysis of test resultsThe False Rate of judge.
(2) specified in more detail goes out according to how different wall divides subregion, and the inventive method in each subregion such as firstWhat sets reference sensitivity and the angle gain compensation of sectoring detection.
(3) the inventive method is applied to that there is the multichannel phased array supersonic of multinomial scanning function or subregion scanning function to setIt is standby；Include with being separately provided on different passages, and by different set on same interface, and there is different basesQuasi- sensitivity and angle gain compensation；
(4) the inventive method is applied to using encoder record scanning position, real-time display scanning data, testing result withImage format is shown, visual and understandable, and quantitative accuracy is high, and the data of storage have dynamic playback function；
(5) the inventive method novel and unique, it is simple to operate it is practical, be easily mastered, be applied widely,
Detection efficiency is high.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present inventionEnclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present inventionThe various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.