CN109696482A - A kind of phased array supersonic flexible probe detection method of elbow corrosion - Google Patents
A kind of phased array supersonic flexible probe detection method of elbow corrosion Download PDFInfo
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- CN109696482A CN109696482A CN201910093642.3A CN201910093642A CN109696482A CN 109696482 A CN109696482 A CN 109696482A CN 201910093642 A CN201910093642 A CN 201910093642A CN 109696482 A CN109696482 A CN 109696482A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
- G01N29/069—Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
Abstract
The present invention provides a kind of phased array supersonic flexible probe detection method of elbow corrosion, selects suitable scanning tooling according to elbow specification；Phased array probe is selected according to wall thickness relevant parameter；Probe is connect with scanning tooling, is bonded probe all with elbow surface；The rule setting depth of focus and Scanning speed, acquisition unit excitation pulse signal are focused using zero degree vertical linearity, pulse signal is excited probe chip after calculating by phased array element computed phase delay, and probe generates ultrasonic wave；Ultrasonic wave penetrates propagation in elbow workpiece, and after encountering reflection object, sound wave reacts on probe, and acoustical signal is switched to electric signal by data acquisition unit；Phased array element carries out calculating integration to electric signal, and acquisition unit receives the signal after integration and carries out software algorithm imaging；The ultrasonic phased array testing result of each elbow is stored by electronical record, is exported and is able to record persistence using the specific location and size, its intuitive display, detection data of software analysis corrosion.
Description
Technical field
The present invention relates to pipeline, pressure vessel, station elbow Corrosion monitoring technical field more particularly to a kind of elbow
The phased array supersonic flexible probe detection method of corrosion.
Background technique
Pipeline is widely used in multiple industries such as oil gas, chemical industry, electric power, and channel bend is indispensable in pipe-line system
Part.Most channel bends are influenced by high temperature, high pressure and complex external environment at work, and are managed in use
It is washed away always by medium on the inside of road elbow positive camber, so that erosion corrosion is generated, trommel.In addition, under high temperature and pressure, pipe
Road elbow tube wall is easy to produce crackle.Disadvantages described above is easy Rapid Expansion under high pressure, and tube wall at channel bend is caused to crack, into
And cause leakage accident.The situation of channel bend directly affects the operation of entire pipe-line system, it is therefore necessary to research and development pipe
Road elbow detection device detects elbow internal flaw and corrosion.
After long-distance transport pipes, pressure vessel, station long service, since internal fluid (gas or liquid) can be in tubing
Wall erosion, prolonged corrosion will cause workpiece and be thinned, or even penetrate.So needing to carry out corrosion inspection to in-service tubing
It surveys, monitors corrosion of the pipe wall situation.At present for corrosion mainly using ultrasonic thickness measurement, the detection of ray detection, conventional vortex, arteries and veins
Punching vortex inspection, the detection methods such as far-field eddy.Ray detection needs radioactive source, there is pollution during actually detected, and to people
Body is harmful；Conventional vortex detection is easy to be influenced by kelvin effect, and detection is intended to the defect of surface of test piece；Pulsed eddy current testing category
It pinpoints and detects in putting type, when for the detection of complicated channel bend, there are certain blind area, and it is sensitive to local defect
Degree is inadequate.The defective locations of inside and outside wall cannot be distinguished in precursor in far field.Ultrasonic thickness measurement is to predominantly detect means at present.
Ultrasonic thickness-measuring method is primarily present following problems: tubing carries out grid scribing line, and elbow is divided into several regions, uses
Calibrator carries out reconnaissance test, selects characteristic point, inspects by random samples to elbow, cannot achieve elbow detection zone and be completely covered；Using super
Sound calibrator is detected, can only wall-thickness measurement reading, do not know that corrosion condition；Thickness measuring is carried out to elbow, takes reading shape
Formula, data can not store record；By Curvature Effect, crook is unable to measure in elbow, has blind area；Scribing line takes point efficiency low.
Summary of the invention
In order to solve problem above, the present invention provides a kind of phased array supersonic flexible probe detection method of elbow corrosion,
It uses phased array ultrasonic detection, can be bonded probe using flexibility for elbow Curvature varying, detect to elbow 100%, inspection
Measured data is capable of forming multiple display modes, and intuitive display takes into account the inspection of elbow base material while understanding elbow interior wall corrosion condition
It surveys, detection data is able to record persistence.
The technical scheme is that a kind of phased array supersonic flexible probe detection method of elbow corrosion is provided, including
Following steps:
Step 1: suitable scanning tooling is selected according to elbow specification；
Step 2: phased array probe, and commissioning device are selected according to wall thickness relevant parameter；
Step 3: probe is connect with scanning tooling, is bonded probe all with elbow surface；
Step 4: the rule setting depth of focus and Scanning speed are focused using zero degree vertical linearity, acquisition unit excites arteries and veins
Signal is rushed, pulse signal is excited probe chip after calculating by phased array element computed phase delay, and probe generates ultrasonic wave；
Step 5: ultrasonic wave penetrates propagation in elbow workpiece, and after encountering reflection object, sound wave reacts on spy
Acoustical signal is switched to electric signal by head, data acquisition unit；
Step 6: phased array element carries out calculating integration to electric signal, and acquisition unit receives the signal after integration
And carry out software algorithm imaging；
Step 7: the ultrasonic phased array testing result of each elbow is stored by electronical record, is exported and is utilized software point
Analyse the specific location and size of corrosion.
Further, detection caliber and elbow wall thickness are determined, area to be tested is cleared up, according to the focusing of setting
Then determine disposable detection zone, for convenient for detect stroke accuracy, elbow region cross identify, determine scanning starting point,
Scanning direction and scanning distance length.
Further, phased array host is selected, is increased according to the wall thickness of workpiece, phased array devices require disposable excitation brilliant
Piece be not less than 16 chips, number of channels be not less than 64 chips, need to set detection sensitivity according to actually detected, using test block into
Row calibration, confirms distance gain size curve.
Further, phased array probe is selected, according to wall thickness and detects sensitive selection frequency appropriate, detection frequency is
1Mhz-10Mhz is detected using 0 degree of linear longitudinal wave, and disposable exciting wafer is lower than 6 chips.
Further, selection scanning cooperates tooling, and scanning tooling mainly considers the interior of the curvature of caliber, especially elbow
Diameter influences the transmitting and reception of signal, and scanning tooling is recorded using encoder, covers entire detection zone.
Further, coupled modes can be used direct-coupling or indirect water coincidence mode, direct-coupling pop one's head in directly with
Workpiece surface contact, is put into couplant between probe and voussoir, is bonded probe with the perfection of elbow surface using pressure, obtains
Ultrasonic signal；Indirect water coincidence uses water wedge, can reduce the consumption of water, and can handle the bubble in water, while can make to sweep
It looks into device to be attached on the convex surface and concave surface of elbow, and keeps data synchronous with surface echo.
Compared with prior art, the beneficial effects of the present invention are: being corroded using phased-array technique detection elbow, have following
Advantage: flexible probe is bonded completely with surface, can obtain excellent signal；Detection zone covers entire elbow, not will cause leakage
Inspection；More kinds of images of A/B/C/S are capable of forming, intuitive display can directly observe corrosion condition；It is recorded using encoder,
Data record in real time and being capable of persistences；It is fast to detect speed, high-efficient, precision is high, the good good effect of detection effect；It is phased
The case where battle array ultrasound detection elbow corrosion, facilitates user and formulate operating scheme.It, can be much of that by phased array imaging section view
Wall thickness change situation is solved, the service state of elbow is monitored.
Detailed description of the invention
Further the present invention is illustrated below according to figure:
Fig. 1 is the phased array imaging display figure of flexible phased array probe detection elbow corrosion of the invention；
Specific embodiment
Below with reference to figure, the present invention is described in further detail, it should be noted that scheme for explaining only the invention,
It is to be schematically illustrated to the embodiment of the present invention, and should not be understood as limitation of the invention.
As shown in Figure 1, a kind of phased array supersonic flexible probe detection method of elbow corrosion, comprising the following steps:
Step 1: suitable scanning tooling is selected according to elbow specification；
Step 2: phased array probe, and commissioning device are selected according to wall thickness relevant parameter；
Step 3: probe is connect with scanning tooling, is bonded probe all with elbow surface；
Step 4: the rule setting depth of focus and Scanning speed are focused using zero degree vertical linearity, acquisition unit excites arteries and veins
Signal is rushed, pulse signal is excited probe chip after calculating by phased array element computed phase delay, and probe generates ultrasonic wave；
Step 5: ultrasonic wave penetrates propagation in elbow workpiece, and after encountering reflection object, sound wave reacts on spy
Acoustical signal is switched to electric signal by head, data acquisition unit；
Step 6: phased array element carries out calculating integration to electric signal, and acquisition unit receives the signal after integration
And carry out software algorithm imaging；
Step 7: the ultrasonic phased array testing result of each elbow is stored by electronical record, can be exported and be utilized soft
The specific location and size of part analysis corrosion.
Further, detection caliber and elbow wall thickness are determined, area to be tested is cleared up, according to the focusing of setting
It then determines disposable detection zone, for the accuracy convenient for detecting stroke, can cross and identify in elbow region, determine that scanning rises
Point, scanning direction and scanning distance length.
Further, phased array host is selected, is increased according to the wall thickness of workpiece, phased array devices require disposable excitation brilliant
Piece is not less than 16 chips, and number of channels is not less than 64 chips, needs to set detection sensitivity according to actually detected, is tried using correlation
Block is calibrated, and confirms distance gain size curve.
Further, phased array probe is selected, according to wall thickness and detects sensitive selection frequency appropriate, detection frequency is general
It for 1Mhz-10Mhz, is detected using 0 degree of linear longitudinal wave, disposable exciting wafer is lower than 6 chips.
Further, selection scanning cooperates tooling, and scanning tooling mainly considers the interior of the curvature of caliber, especially elbow
Diameter, will affect the transmitting and reception of signal, and scanning tooling can be easy or complicated, it is important to be able to use encoder
It is recorded, covers entire detection zone.
Further, coupled modes can be used direct-coupling or indirect water coincidence mode, direct-coupling pop one's head in directly with
Workpiece surface contact, is put into couplant between probe and voussoir, is bonded probe with the perfection of elbow surface using pressure, obtains
Excellent ultrasonic signal；Indirect water coincidence uses water wedge, can largely reduce the consumption of water, and can easily handle
Bubble in water, while scanner can be made to be attached on the convex surface and concave surface of elbow, in the detection etc. when the surface of degree of roughness
Preferable coupling effect is obtained, and keeps data synchronous with surface echo.
Workpiece surface cleaning is detected, spatter, iron filings, grease and other impurities should be removed in moving area of popping one's head in.It must
It polishes when wanting, convenient for probe movement and obtains excellent ultrasonic signal.Surface roughness value Ra is not more than 6.3um, if
The acquisition that surface has biggish pit to should be noted that ultrasonic signal.Intend picture sound field ruling according to the width for focusing rule probe.Ruling
It should not influence to detect.Zero point scanning starting position is set, is marked.Marking content should include scanning starting point and scanning direction.
Couplant is selected, couplant should be selected to material, and environment, human body is harmless, while having good sound transparency, Yi Qing
The substance washed.If using water wedge, couplant should select water, if circulation pattern can be used in conditions permit.
The selection of detection sensitivity, distance gain size curve can be used flat-bottom hole as reflector, adjust detection sensitivity, this
Method is conducive to the defect of discovery inside workpiece；The adjustment sensitivity of bottom wave can also be used, this mode is used to detect inside workpiece corrosion
Situation.Using test block adjust sensitivity when, test block should using with detection workpiece same material, the material of similar face state, such as
The not identical attenuation characteristic for being considered as material of fruit compensates.The surface state for detecting workpiece and test block should be consistent, if poor
It is not larger, the compensation of the surface Ying Jinhang.
Detection uses electron scanning mode.Using 0 degree of longitudinal wave line focus rule, acoustic beam is perpendicular to workpiece bottom, favorably
In the acquisition of ultrasonic signal.Data record is recorded using encoder, and encoder resolution is less than or equal to 1mm, can be according to reality
The signal of border detection is adjusted.Linear scan and grating scanning can be used in detection mode.Grating scanning is used under normal circumstances,
X/Y twin shaft is encoded using encoder, can be completed the covering to entire elbow, be recorded the detection data of entire elbow.
It should be noted that observation bottom wave when scanning, guarantee that coupling is good.Probe scanning movement speed is not to be exceeded 150mm/s. and sweeps
Looking into speed should be with reference to the acquisition speed using phased array devices.Probe scanning movement speed should be less than phased array devices in principle
Acquire speed.It is substantially reduced or loses in case of bottom wave wave amplitude, it should be noted that observation, analysis are flaw indications or couple not
Caused by good.It should ensure that scanning data are not lost when scanning.Qualified data are stored.
According to the needs of detection A sweep can be used, S scanning, B-scan, C-scan is in scanning number in the display of scanning image
According to image in should there is encoder scanning position to show；
Sensilivily Check, continuous work after a certain period of time, to detection detection sensitivity check.Guarantee detection spirit
Sensitivity accuracy.
Data analysis, will test data and is analyzed, and is shown by imaging, obtains the corrosion condition of elbow.Pass through measurement
The depth and area that corrosion can be calculated monitor elbow and provide technical support.
Embodiment
Step 1: suitable scanning tooling is selected according to elbow specification；Detection caliber and elbow wall thickness are determined, to be detected
Region is cleared up, and determines disposable detection zone according to the focusing rule of setting, for convenient for detect stroke accuracy, curved
Head region scribing line mark, determines scanning starting point, scanning direction and scanning distance length.
Step 2: phased array probe, and commissioning device are selected according to wall thickness relevant parameter；Phased array host is selected, according to
The wall thickness of workpiece increases, and phased array devices require disposable exciting wafer to be not less than 16 chips, and number of channels is not less than 64 chips,
It needs to set detection sensitivity according to actually detected, be calibrated using test block, confirm distance gain size curve.
Step 3: probe is connect with scanning tooling, is bonded probe all with elbow surface；Phased array probe is selected,
According to wall thickness and sensitive selection frequency appropriate is detected, detection frequency is 1Mhz-10Mhz, is examined using 0 degree of linear longitudinal wave
It surveys, disposable exciting wafer is lower than 6 chips.
Step 4: the rule setting depth of focus and Scanning speed are focused using zero degree vertical linearity, acquisition unit excites arteries and veins
Signal is rushed, pulse signal is excited probe chip after calculating by phased array element computed phase delay, and probe generates ultrasonic wave；Choosing
Select scanning cooperation tooling, scanning tooling mainly considers the internal diameter of the curvature of caliber, especially elbow, influence the transmitting of signal with
It receives, scanning tooling is recorded using encoder, covers entire detection zone.Direct-coupling or indirect can be used in coupled modes
Water coincidence mode, direct-coupling are popped one's head in and are directly contacted with workpiece surface, couplant is put between probe and voussoir, utilizes pressure
Power is bonded probe with the perfection of elbow surface, obtains ultrasonic signal；Indirect water coincidence uses water wedge, can reduce the consumption of water
Amount, and the bubble in water can be handled, while scanner can be made to be attached on the convex surface and concave surface of elbow, and return data and surface
Wave is synchronous.
Step 5: ultrasonic wave penetrates propagation in elbow workpiece, and after encountering reflection object, sound wave reacts on spy
Acoustical signal is switched to electric signal by head, data acquisition unit；
Step 6: phased array element carries out calculating integration to electric signal, and acquisition unit receives the signal after integration
And carry out software algorithm imaging；
Step 7: the ultrasonic phased array testing result of each elbow is stored by electronical record, can be exported and be utilized soft
The specific location and size of part analysis corrosion.
The present invention uses phased array ultrasonic detection, probe can be bonded using flexibility for elbow Curvature varying, to elbow
100% detection, detection data are capable of forming multiple display modes, and intuitive display understands simultaneous while elbow interior wall corrosion condition
The detection of elbow base material is cared for, detection data is able to record persistence.
The present invention is corroded using phased-array technique detection elbow, has the advantage that flexible probe is bonded completely with surface,
It can obtain excellent signal；Detection zone covers entire elbow, not will cause missing inspection；More kinds of images of A/B/C/S are capable of forming, are shown
Show intuitively, can directly observe corrosion condition；It is recorded using encoder, data record in real time and being capable of persistence；Inspection
Degree of testing the speed is fast, high-efficient, and precision is high, the good good effect of detection effect；The case where phased array ultrasonic detection elbow corrodes, helps
Operating scheme is formulated in user.By phased array imaging section view, wall thickness change situation can be understood, to the military service shape of elbow
State is monitored.
The technical principle that detailed description of the preferred embodimentsthe present invention has been described is combined above.These descriptions are intended merely to explain the present invention
Principle, and the limitation of the scope of the present invention cannot be construed in any way.For those skilled in the art,
It can still modify to technical solution documented by previous examples, or part of technical characteristic is replaced on an equal basis
It changes, all within the spirits and principles of the present invention, any modification, same replacement, improvement for being made etc. are all contained in of the invention
Protection scope.
Claims (6)
1. a kind of phased array supersonic flexible probe detection method of elbow corrosion, which comprises the following steps:
Step 1: suitable scanning tooling is selected according to elbow specification；
Step 2: phased array probe, and commissioning device are selected according to wall thickness relevant parameter；
Step 3: probe is connect with scanning tooling, is bonded probe all with elbow surface；
Step 4: the rule setting depth of focus and Scanning speed, acquisition unit excitation pulse letter are focused using zero degree vertical linearity
Number, pulse signal is excited probe chip after calculating by phased array element computed phase delay, and probe generates ultrasonic wave；
Step 5: ultrasonic wave penetrates propagation in elbow workpiece, and after encountering reflection object, sound wave reacts on probe, number
Acoustical signal is switched into electric signal according to acquisition unit；
Step 6: phased array element carries out calculating integration to electric signal, and acquisition unit receive to the signal after integration and be gone forward side by side
The imaging of row software algorithm；
Step 7: the ultrasonic phased array testing result of each elbow is stored by electronical record, is exported and is analyzed using software rotten
The specific location and size of erosion.
2. a kind of phased array supersonic flexible probe detection method of elbow corrosion according to claim 1, it is characterised in that: really
Regular inspection test tube diameter and elbow wall thickness, clear up area to be tested, determine disposable detection zone according to the focusing rule of setting
It crosses and identifies in elbow region, determine scanning starting point, scanning direction and scanning distance for the accuracy convenient for detecting stroke in domain
Length.
3. a kind of phased array supersonic flexible probe detection method of elbow corrosion according to claim 1, it is characterised in that: choosing
Phased array host is selected, is increased according to the wall thickness of workpiece, phased array devices require disposable exciting wafer to be not less than 16 chips, channel
Quantity is not less than 64 chips, needs to set detection sensitivity according to actually detected, be calibrated using test block, confirms apart from wave amplitude
Curve.
4. a kind of phased array supersonic flexible probe detection method of elbow corrosion according to claim 1, it is characterised in that: choosing
Phased array probe is selected, according to wall thickness and detects sensitive selection frequency appropriate, detection frequency is 1Mhz-10Mhz, using 0 degree of line
Property longitudinal wave detected, disposable exciting wafer be lower than 6 chips.
5. a kind of phased array supersonic flexible probe detection method of elbow corrosion according to claim 1, it is characterised in that: choosing
Select scanning cooperation tooling, scanning tooling mainly considers the internal diameter of the curvature of caliber, especially elbow, influence the transmitting of signal with
It receives, scanning tooling is recorded using encoder, covers entire detection zone.
6. a kind of phased array supersonic flexible probe detection method of elbow corrosion according to claim 1, it is characterised in that: coupling
Direct-coupling or indirect water coincidence mode can be used in conjunction mode, and direct-coupling is popped one's head in and directly contacted with workpiece surface, popping one's head in
It is put into couplant between voussoir, is bonded probe with the perfection of elbow surface using pressure, obtains ultrasonic signal；Indirect water coincidence
Using water wedge, the consumption of water can be reduced, and the bubble in water can be handled, while scanner can be made to be attached to the convex surface of elbow
On concave surface, and keep data synchronous with surface echo.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111487314A (en) * | 2020-04-15 | 2020-08-04 | 首钢京唐钢铁联合有限责任公司 | Scanning method based on ultrasonic detection |
| CN111812206A (en) * | 2020-06-19 | 2020-10-23 | 中国船舶重工集团公司第七二五研究所 | Multilayer diffusion welding phased array ultrasonic detection method |
| CN113075297A (en) * | 2021-05-06 | 2021-07-06 | 西部超导材料科技股份有限公司 | Titanium alloy phased array linear array ultrasonic detection sound field model construction method |
| CN114263856A (en) * | 2021-12-27 | 2022-04-01 | 中国石油大学(北京) | Corrosion monitoring system and method based on two-dimensional flexible area array piezoelectric ultrasound |
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