CN101017155A - Ultrasonic phased array inspection imaging system of tubular joint weld - Google Patents
Ultrasonic phased array inspection imaging system of tubular joint weld Download PDFInfo
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- CN101017155A CN101017155A CN 200610009690 CN200610009690A CN101017155A CN 101017155 A CN101017155 A CN 101017155A CN 200610009690 CN200610009690 CN 200610009690 CN 200610009690 A CN200610009690 A CN 200610009690A CN 101017155 A CN101017155 A CN 101017155A
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Abstract
This invention relates to one tube point weld supersonic phase control array test of image system, which comprises computer, supersonic control array circuit system, scanning device, phase control detector and test image software system. The system has control supersonic wave emission receive, control sound beam bias focus, control scanner movement type and collection of deficiency information and position information and recreation of deficiency image.
Description
(1) technical field
What the present invention relates to is a kind of Ultrasonic Detection imaging device.Specifically a kind of ultrasonic phase array that is used for the tubular joint weld nondestructive examination detects imaging system.
(2) background technology
Offshore platform structure is in briny environment, bears the influence of fatigue loads such as wave, storm tide and ocean current for a long time, the impact with earthquake or tsunami of rising and falling of ship collision, helicopter.These factor actings in conjunction will cause offshore platform structure to produce phenomenons such as fatigure failure, brittle fracture, corrosion thinning and quiet dynamic load unstability, and wherein tubular joint weld is the position of easy generation of defective.Because tubular joint weld complex forms, the shape of its section of weld joint changes along with the difference of the position on its intersection, the wall thickness of primary branch is bigger in addition, is difficult to carry out with film radiography, and the main both at home and abroad at present list probe ultrasound wave manual testing method that adopts is tested.Therefore many factors depend on flaw detection personnel's experience and technology, from repeatability and reliability existing problems.And in the manual ultrasonic inspection of offshore platform structure tubular joint weld, there be undetectable " dead band "." dead band " size is relevant with the refraction angle of probe, and the refraction angle increases, and " dead band " 1 district diminishes the change of 2 districts greatly.Therefore adopt different refraction angles probe can reduce " dead band " area, but common single probe is not accomplished the transformation of angle; And the conventional ultrasound detection system can only provide the A sweep waveform of flaw indication, and intuitively the display defect image is unfavorable for defective is carried out quantitative test.
And ultrasonic phased array technology itself just can be controlled the deflection and the focusing of acoustic beam by electronic method, adopt a ultrasonic phase array probe promptly can launch the acoustic beam of multiple different angles, dispose mechanical scanning equipment, significantly reduced the scanning travel time, simplified scan pattern, and the energy real time imagery is highly suitable for the demand that the complicated pipe node form of offshore platform structure detects.Because can dynamically change the time delay of phased array elements, mainly be the two big characteristics of utilizing it so use the ultrasonic phased array technology flaw detection: acoustic beam deflection and dynamic aggregating.Owing to realized the control of ultrasonic wave acoustic beam angle, focal length, focal spot size, to compare with the conventional ultrasound detection technique, the ultrasonic phase array detection technique has following advantage: realized the detection of labyrinth and position, blind area defective; Can realize high-velocity scanning; The configuration mechanical clamp can carry out high speed, comprehensive, multi-angle detection to test specimen; Has certain superiority at aspects such as definition, signal to noise ratio (S/N ratio), defective recall rates.From the nineties ultrasonic phased array technology be widely used in industrial circle Non-Destructive Testings such as nuclear industry, aerospace industry, petrochemical complex and civil engineering work.
(3) summary of the invention
The object of the present invention is to provide a kind of high efficiency, can reduce tubular joint weld and detect the area that " dead band " exists, the reliability height of accuracy of detection, reappearance and testing result can strengthen the real-time of detection and the ultrasonic phased array inspection imaging system of tubular joint weld of intuitive.
The object of the present invention is achieved like this: it comprises computing machine, ultrasonic phase array circuit, scanning equipment, phased array probe and detection imaging software; Computing machine links to each other with the ultrasonic phase array circuit by the usb data bus, the ultrasonic phase array circuit links to each other with the ultrasonic phase array probe by concentric cable, the ultrasonic phase array circuit links to each other with the control box of scanning equipment by connector, the ultrasonic phase array probe is installed on the probe clip of scanner, detects imaging software and installs on computers.
The present invention can also comprise some features like this:
1, computing machine, detection imaging software and ultrasonic phase array circuit construction system control section according to the detection demand, detect imaging software and carry out the parameter setting, provide instruction by computing machine, and the ultrasonic phase array circuit provides control signal.
2, scanning equipment is made up of scanner and electric control system, scanning equipment and ultrasonic phase array probe construction system scanning part, guidance panel and controller are formed a part, be installed in the control box of scanner, the scanner basic machine that carries the ultrasonic phase array probe partly is installed on the arm of tested pipe node.
3, the ultrasound phase-control probe is frequency of operation 5MHz, and the linear array of 64 array elements is made up of transducer, housing, cable and annex thereof.
4, the ultrasonic phase array circuit is made up of a mainboard, a master control borad and eight ultrasonic triggering/dash receivers, 10 slots are arranged on the mainboard, master control borad and eight ultrasonic triggering/dash receivers patch respectively on mainboard, the ultrasonic phase array probe uses concentric cable by connector and mainboard, links to each other with eight ultrasonic triggering/dash receivers respectively.
5, scanner is made up of walking dolly, flexible probe holder, flexible rail and swing head for along the moving of track, perpendicular to the moving and the four-degree-of-freedom robot of two oscillating motions of track.
6, the scanner electric-control system is formed and is comprised direct current generator and coaxial rotary encoder and two parts of electric control box that are installed on the scanner basic machine.
7, detecting imaging software is the software systems of customer end/server mode, comprise debugging module, project management, control module, visual demonstration, defect analysis and hardware driving, debugging module selects interface and rippled interface to form by scheme interface, parameter interface, waveform.
Software systems can be called test item and watch data, can generate new detection scheme and test item and check, can provide four kinds of display modes of defect image, and can carry out defect analysis, generate defect report automatically.
Detect imaging software and set up pipe node detection algorithm model, at the parameter interface, input state parameter, detected parameters, voussoir parameter, acoustic beam parameter, probe parameter and scanning such as are provided with at item of information, just can access detection scheme, launch acoustic beam, control time delay, array element combination, gain, sound path and the gate width of each array element.
Compare with the conventional ultrasound detecting instrument, ultrasonic phased array inspection imaging system of tubular joint weld has the following advantages:
1) uses scanner to carry the ultrasonic phase array probe and detect tubular joint weld, can increase work efficiency greatly, saved detection time and expense in large quantities.
2) adopt a ultrasonic phase array probe to launch the acoustic beam of multiple different angles, realized the deflection and the dynamic focusing of acoustic beam, satisfied the demand of complicated tubular joint weld Ultrasonic Detection, reduced the area that tubular joint weld detection " dead band " exists.
3) compare with the conventional ultrasound detecting instrument, the reliability of the accuracy of detection, reappearance and testing result is improved, and the real-time and the intuitive of detection have obtained enhancing.
4) can provide visual scan image directly perceived, it is qualitative to be beneficial to defect analysis.
5) traditional detection technique is very high to testing staff's competency profiling, and the testing staff need possess frogman and the dual qualification of detection person under water, yet China this class talent extremely lacks.It is insensitive and do not need calibration to the operation of probe that the offshore platform structure ultrasonic phase array detects imaging system, and testing staff's requirement is reduced greatly, only needs diving personnel to non-Non-Destructive Testing specialty suitably train and get final product.
Following table has been listed the ultrasonic phased array inspection imaging system of tubular joint weld performance index
| Port number | 64 |
| Frequency of operation | 5MHz |
| Emission voltage | 50V |
| Operating voltage | 220V |
| Full gain | 60-80dB |
| Dynamic range | 60dB |
| Delay precision | 1ns |
| The pulse delay scope | 0us～65us |
| Receive reference time delay | 0us～16000us |
| The A/D sample frequency | 62.5MHz |
| Signal amplifies bandwidth | 650kHz～20MHz |
| The maximum impulse repetition frequency | 2KHz |
| Suitable working range | -20℃～50℃ |
| Be suitable for and detect wall thickness | 16mm～26mm |
Wherein the phased array Circuits System postpones precision 1ns, has reached international most advanced level; Ultrasonic phase array probe performance has reached international like product level.
(4) description of drawings
Fig. 1 ultrasonic phased array inspection imaging system of tubular joint weld structural drawing;
Fig. 2 ultrasonic phased array inspection imaging system of tubular joint weld is implemented figure.
(5) specific embodiments
For example the present invention is done more detailed description below in conjunction with accompanying drawing:
In conjunction with Fig. 1, ultrasonic phased array inspection imaging system of tubular joint weld comprises computing machine 1, ultrasonic phase array Circuits System 2, ultrasonic phase array probe 3 and scanning equipment 4.Computing machine 1 links to each other with ultrasonic phase array Circuits System 2 by the usb data bus, ultrasonic phase array Circuits System 2 links to each other with ultrasonic phase array probe 3 by concentric cable, ultrasonic phase array Circuits System 2 links to each other with the control box 5 of scanning equipment 4 by connector, ultrasonic phase array probe 3 is installed on the scanner 4, detects imaging software and is installed on the computing machine 1.
Detect imaging software and set up pipe node detection algorithm model, at the parameter interface, input state parameter, detected parameters, voussoir parameter, acoustic beam parameter, probe parameter and scanning such as are provided with at item of information, just can access detection scheme, launch acoustic beam, control time delay, array element combination, gain, sound path and the gate width of each array element.
Ultrasound phase-control probe 3 is frequency of operation 5MHz, and the linear array of 64 array elements is made up of transducer, housing, cable and annex thereof, and waterproof, withstand voltage uses water as couplant.Array element be can select according to pipe node detection algorithm control requirement, array element dead time, receive delay time changed, emission allows and receive and allow.
Ultrasonic phase array Circuits System 2 is made up of a mainboard, a master control borad and eight ultrasonic triggering/dash receivers.
Mainboard is made up of 10 slots, and wherein 9 slots are used for patching 8 triggering/expelling plates and master control board, and first slot of the right is used for patching the ultrasonic phase array probe.
Master control borad is mainly finished the preparation program of each ultrasonic triggering/dash receiver of preparation detection algorithm; Produce the synchronizing signal of each ultrasonic triggering/dash receiver; The control of realization scanner comprises the speed of travel, and direction of travel and walking enable control, can realize the multiple speed of travel.
8 ultrasonic triggering/dash receivers have identical circuit function, and every ultrasonic triggering/dash receiver can be realized the triggering of 8 road signals and the collection of echoed signal.Ultrasonic triggering/dash receiver is mainly finished the triggering of ultrasonic array element and the conditioning and the collecting work of ultrasound echo signal.In this system, adopt unique array element to trigger scheme, make under the same conditions, ultrasound intensity can be improved about 35%.
In ultrasonic phase array Circuits System 2, the waveform of each array element echoed signal adopts hard-soft delay technology, reduces the system hardware complexity, improves the dirigibility of signal Processing.Utilize hard-soft delay technology, this system realizes the signal receive delay precision of stepping 1ns.The independent ultrasonic pulse that can realize adjacent 32 array elements triggers and the reception of independent ultrasonic signal.
Scanning equipment 4 is made up of scanner 6 and electric control system.
The scanner electric-control system is realized the position control of tubular joint weld Ultrasonic Detection process ultrasonic probe, and its system forms and mainly comprises direct current generator and coaxial rotary encoder and 5 two parts of electric control box that are installed on the scanner basic machine.
Detecting imaging software is the software systems of a customer end/server mode, these software systems can be called test item and watch data, can generate new detection scheme and test item checks, can provide four kinds of display modes of defect image, and can carry out defect analysis, generate defect report automatically.These software systems comprise debugging module, project management, control module, visual demonstration, defect analysis and hardware driving, debugging module selects interface and rippled interface to form by scheme interface, parameter interface, waveform, the major function of debugging module is all schemes in the management detection algorithm debug process, calls in order to control module.The major function of project management module is that the test item in the past that calls in the database is checked data or generated new test item so that carry out the scheme detection at the control interface.The major function of control module is to call the detection scheme that the debugging interface generates, according to existing test item needs, and input detected parameters, the detection scanning of beginning new projects.The major function of image display is the scanning result of display control interface detection record.The defect analysis module functions is that the defect size in C scanning and the D scan image is measured, and judges whether it is qualified.
In conjunction with Fig. 2, computing machine 1, detection imaging software and ultrasonic phase array Circuits System 2 form the systems control division branches.According to the detection demand, detect imaging software and carry out the parameter setting, provide instruction by computing machine 1, ultrasonic phase array Circuits System 2 provides control signal.Control box 5, scanner 6 and ultrasonic phase array probe 3 form system's scanning part, and scanner 6 reception walking instructions are carried ultrasonic phase array probe 3 and carry out scanning on the arm 7 of tested pipe node.
Before tubular joint weld detects, at first the scanner track is installed on the correct position of pipe node model arm 7 outer walls, adjust orbital direction and make it parallel, and track is adsorbed on the Zhi Guanbi, make it firm with the double magnet base of constant spacing with the arm circumferential plane; Then crawl trolley is installed from track one side, adjusting the crawl trolley attitude can normally walk it, and then load onto stop means at the track two ends, guarantee the walking of crawl trolley safety, do not run out of track, with chain track is locked at last, can not avoid damaging scanner owing to unexpected obscission takes place the effect of scanner weight to guarantee track.The basic machine structure that begins to install scanner after the track locking, expansion bracket at first is installed on crawl trolley, then will swing head and be installed in the expansion bracket front end, and probe clip is fixed on the swing head, make probe clip clamp phased array probe, adjust the horizontal range of phased array probe and tubular joint weld by voussoir, the axial clearance and the probe elevation angle, make it reach the requirement of tubular joint weld detection algorithm, then according to a detection position adjustment swing deflection angle, make probe perpendicular to tubular joint weld, can begin the defective flaw detection by the operation detection imaging software after the probe positions adjustment finishes.
Testing staff's operation detection imaging software is set up new projects in project management module then, and project information such as engineering name, owner, detection company, node serial number, node shape, node angle are drawn together in input.Call the detection scheme that the debugging interface generates in control module then, according to newly-built test item needs, input is laid track, is detected detected parameters such as number of times, scanning mode, motor drive direction, scanning length and frame thickness, the detection of beginning new projects.The testing staff function software sends the scanning instruction, computing machine 1 is about to detection scheme and disposes to phased array Circuits System 2, phased array Circuits System 2 produces ultrasonic signal according to detection scheme, the deflection and the focusing of control acoustic beam, send the walking instruction for simultaneously scanner 6, and the reception ultrasound echo signal, give computing machine with the data biography by the usb data bus and deposit database in.Scanning finishes the back and clicks image display, can access the result that this project detects, defect image is with A, B, four kinds of scan image display modes of C, D, click somewhere in C scanning or the D scan image, just can access the B scan image of corresponding scanning position and at all A sweep curves of this position.Click the defect analysis module then,, can measure the size of defective in C scanning and the D scan image, and judge according to examination criteria whether it is qualified, and system generates defect report automatically then, and can preserve printing according to the tubular joint weld examination criteria.
Claims (8)
1, a kind of ultrasonic phased array inspection imaging system of tubular joint weld, it comprises computing machine, ultrasonic phase array circuit, scanning equipment, phased array probe and detection imaging software; It is characterized in that: computing machine links to each other with the ultrasonic phase array circuit by the usb data bus, the ultrasonic phase array circuit links to each other with the ultrasonic phase array probe by concentric cable, the ultrasonic phase array circuit links to each other with the control box of scanning equipment by connector, the ultrasonic phase array probe is installed on the probe clip of scanner, detects imaging software and installs on computers.
2, ultrasonic phased array inspection imaging system of tubular joint weld according to claim 1, it is characterized in that: computing machine, detection imaging software and ultrasonic phase array circuit construction system control section, according to the detection demand, detect imaging software and carry out the parameter setting, provide instruction by computing machine, the ultrasonic phase array circuit provides control signal.
3, ultrasonic phased array inspection imaging system of tubular joint weld according to claim 1, it is characterized in that: scanning equipment is made up of scanner and electric control system, scanning equipment and ultrasonic phase array probe construction system scanning part, guidance panel and controller are formed a part, be installed in the control box of scanner, the scanner basic machine that carries the ultrasonic phase array probe partly is installed on the arm of tested pipe node.
4, ultrasonic phased array inspection imaging system of tubular joint weld according to claim 1 is characterized in that: the ultrasound phase-control probe is frequency of operation 5MHz, and the linear array of 64 array elements is made up of transducer, housing, cable and annex thereof.
5, ultrasonic phased array inspection imaging system of tubular joint weld according to claim 1, it is characterized in that: the ultrasonic phase array circuit is made up of a mainboard, a master control borad and eight ultrasonic triggering/dash receivers, 10 slots are arranged on the mainboard, master control borad and eight ultrasonic triggering/dash receivers patch respectively on mainboard, the ultrasonic phase array probe uses concentric cable by connector and mainboard, links to each other with eight ultrasonic triggering/dash receivers respectively.
6, ultrasonic phased array inspection imaging system of tubular joint weld according to claim 1, it is characterized in that: scanner is made up of walking dolly, flexible probe holder, flexible rail and swing head for along the moving of track, perpendicular to the moving and the four-degree-of-freedom robot of two oscillating motions of track.
7, ultrasonic phased array inspection imaging system of tubular joint weld according to claim 3 is characterized in that: the scanner electric-control system is formed and is comprised direct current generator and coaxial rotary encoder and two parts of electric control box that are installed on the scanner basic machine.
8, ultrasonic phased array inspection imaging system of tubular joint weld according to claim 1, it is characterized in that: detecting imaging software is the software systems of customer end/server mode, comprise debugging module, project management, control module, visual demonstration, defect analysis and hardware driving, debugging module selects interface and rippled interface to form by scheme interface, parameter interface, waveform.
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