CN104777220B - A kind of termination end tail monitoring method in metal pipe bar continuous automatic inspection - Google Patents
A kind of termination end tail monitoring method in metal pipe bar continuous automatic inspection Download PDFInfo
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- CN104777220B CN104777220B CN201510187114.6A CN201510187114A CN104777220B CN 104777220 B CN104777220 B CN 104777220B CN 201510187114 A CN201510187114 A CN 201510187114A CN 104777220 B CN104777220 B CN 104777220B
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Abstract
The invention discloses the termination end tail monitoring method in a kind of metal pipe bar continuous automatic inspection, using eddy current testing device in eddy detection technology to the sensitivity characteristic principle of crack of metal surface come monitor during metal pipe bar automatic detection one immediately one be continuously close to the termination end tail of mobile metal pipe bar, the termination end tail positional information of metal pipe bar is provided for automatic detection device, the detection work of detecting instrument is controlled according to this information, eliminate interference effect of the termination end tail signal to detection signal, and each termination of tested metal pipe bar of precise control, end tail blind area size.
Description
Art
The present invention relates to a kind of lossless detection method, the end in more particularly to a kind of metal pipe bar continuous automatic inspection
Head end tail monitoring method.
Background technology
When detecting metal pipe bar using automatic the cannot-harm-detection device, general termination end tail check frequency is 10~20mm,
Detection process needs accurate excision check frequency, particularly with short metal pipe bar detection due to blind area account for the ratio of overall length compared with
Greatly, it appears particularly important, in short metal pipe bar automatic detection, because length is shorter, single short metal pipe bar cannot make
Pass through detection sensor with conventional transfer roller, it is necessary to one and then one pass through detection sensor, so, conventional light
Electric switch or proximity switch cannot judge a laminating end face for the and then metal pipe bar of, these metal pipe bars it
Between laminating section can produce serious interference signal, influence detection work.
The content of the invention
Deficiency it is an object of the invention to overcome prior art, there is provided in a kind of metal pipe bar continuous automatic inspection
Termination end tail monitoring method, using eddy current testing device in eddy detection technology to the sensitivity characteristic principle of crack of metal surface come
Monitoring metal pipe bar automatic detection during one immediately one be continuously close to the termination end tail of mobile metal pipe bar, be
Automatic detection device provides the termination end tail positional information of metal pipe bar, and the detection work of detecting instrument is controlled according to this information
Make, eliminate interference effect of the termination end tail signal to detection signal.
The technical solution adopted for the present invention to solve the technical problems is：In a kind of metal pipe bar continuous automatic inspection
Termination end tail monitoring method, using eddy current testing device in eddy detection technology to the sensitivity characteristic principle of crack of metal surface come
Monitoring metal pipe bar automatic detection during one immediately one be continuously close to the termination end tail of mobile metal pipe bar, be
Automatic detection device provides the termination end tail positional information of metal pipe bar, and the detection work of detecting instrument is controlled according to this information
Make, eliminate interference effect of the termination end tail signal to detection signal, methods described there are two methods,
First method is as follows：
One eddy current probe is placed in the entry position of the detection sensor of automatic detection device；Eddy current probe
Connection eddy current testing instrument；In automatic detection device, tested metal pipe bar one immediately one be close to it is continuous to automatic inspection
The detection sensor movement of device is surveyed, when first front end of metal pipe bar reaches the detection sensor of automatic detection device
During the eddy current probe of entry position, eddy current probe collection in entry position sends metal pipe bar termination induced signal to whirlpool
Stream detector, eddy current testing instrument sends trigger signal after receiving termination induced signal to the control system of automatic detection device,
The detection sensor arrival end of the control system of automatic detection device eddy current probe and automatic detection device according to known to
The distance between and metal pipe bar transmission speed, control detecting instrument pause detection one time period of work, when first
The front end of metal pipe bar goes out after have passed through the detection sensor of automatic detection device with the detection sensor of automatic detection device
When mouth end distance reaches the tested metal pipe bar termination blind area size of regulation requirement, detecting instrument restarts detection work, automatically
The detection sensor of detection means starts to detect metal pipe bar, because the termination of now first metal pipe bar has passed through
The detection sensor of automatic detection device, so metal pipe bar termination interference signal will not be produced；When first metal tube
The termination binding face of the end tail of bar and second metal pipe bar reaches the entrance position of the detection sensor of automatic detection device
When putting eddy current probe, eddy current probe collection in entry position sends the tail faying face sensing of two metal pipe bar terminations end
Signal is to eddy current testing instrument, and it is automatic backward that eddy current testing instrument receives two metal pipe bar terminations end tail faying face induced signal
The control system of detection means sends trigger signal, the control system of automatic detection device according to known to eddy current probe and
The transmission speed of the distance between detection sensor arrival end of automatic detection device and metal pipe bar, control detecting instrument is temporary
Stop detecting one time period of work, when the end tail of first metal pipe bar and the termination binding face of second metal pipe bar are worn
Crossed reach regulation with the detection sensor port of export distance of automatic detection device after the detection sensor of automatic detection device will
During the tested metal pipe bar termination blind area size asked, detecting instrument restarts detection work, the detection sensing of automatic detection device
Device starts to detect metal pipe bar, due to now the end tail of first metal pipe bar and second termination patch of metal pipe bar
Conjunction face has already been through the detection sensor of automatic detection device, so first end tail and of metal pipe bar will not be produced
Two termination binding face interference signals of metal pipe bar；The rest may be inferred, is sent whenever entry position eddy current probe is gathered
When two metal pipe bar terminations end tail faying face induced signal is to eddy current testing instrument, the control system control of automatic detection device
Detecting instrument pause detection one time period of work, until two metal pipe bar terminations end, tail faying face have passed through automatic detection
The tested metal of regulation requirement is reached after the detection sensor of device with the detection sensor port of export distance of automatic detection device
During the blind area size of bar termination, detecting instrument restarts detection work, thus completely eliminates an immediately metal of
The termination of bar, the interference signal of end tail, and each termination of tested metal pipe bar of precise control, end tail blind area are big
It is small；
Second method is as follows：
Two eddy current probes are respectively placed in the entry position and outlet position of the detection sensor of automatic detection device
Put, the eddy current probe of entry position is apart from distance, the outlet port of the detection sensor entrance face of automatic detection device
Eddy current probe apart from the detection sensor exit end face of automatic detection device distance with regulation require tested metal
Bar termination Duan Wei blind areas size is identical；Two eddy current probes connect eddy current testing instrument；In automatic detection device, quilt
Immediately the continuous detection sensor to automatic detection device of being close to of is moved inspection metal pipe bar one, when first metal
When the termination of bar reaches the entry position eddy current probe of the detection sensor of automatic detection device, entry position vortex
Detection probe collection sends metal pipe bar termination induced signal to eddy current testing instrument, and eddy current testing instrument receives termination sensing letter
Trigger signal is sent to the control system of automatic detection device after number, the control system control detecting instrument of automatic detection device is temporary
Stop detecting work, when the detection sensor outlet port that first termination of metal pipe bar reaches automatic detection device is vortexed inspection
During probing head, eddy current probe collection in outlet port sends metal pipe bar termination induced signal to eddy current testing instrument, vortex
Detector sends trigger signal after receiving termination induced signal to the control system of automatic detection device, automatic detection device
Control system control detecting instrument restarts detection work, and the detection sensor of automatic detection device starts to detect metal pipe bar,
Because the termination of now first metal pipe bar has already been through the detection sensor of automatic detection device, so will not produce
Metal pipe bar termination interference signal；When first end tail and second termination binding face of metal pipe bar of metal pipe bar
During the entry position eddy current probe of the detection sensor for reaching automatic detection device, the collection of entry position eddy current probe
Two metal pipe bar terminations end tail faying face induced signal is sent to eddy current testing instrument, eddy current testing instrument receives two metals
After the tail faying face induced signal of bar termination end trigger signal, automatic detection dress are sent to the control system of automatic detection device
The control system control detecting instrument pause detection work put, when first the end tail and second metal pipe bar of metal pipe bar
When the termination binding face of material reaches the detection sensor outlet port eddy current probe of automatic detection device, outlet port vortex
Detection probe collection sends two metal pipe bar terminations end tail faying face induced signal to eddy current testing instrument, and eddy current testing instrument connects
After receiving two metal pipe bar terminations end tail faying face induced signal triggering letter is sent to the control system of automatic detection device
Number, the control system control detecting instrument of automatic detection device restarts detection work, and the detection sensor of automatic detection device is opened
Begin detection metal pipe bar, due to end tail and second termination binding face of metal pipe bar of now first metal pipe bar
Have already been through the detection sensor of automatic detection device, thus will not produce first metal pipe bar end tail and second
The termination binding face interference signal of metal pipe bar；The rest may be inferred, whenever eddy current probe collection in entry position sends two
When metal pipe bar termination end tail faying face induced signal is to eddy current testing instrument, the control system control detection of automatic detection device
Instrument pause detection work, whenever eddy current probe collection in outlet port sends two metal pipe bar terminations end tail faying face
During induced signal to eddy current testing instrument, the control system control detecting instrument of automatic detection device restarts detection work, thus
Immediately the termination of the metal pipe bar of, the interference signal of end tail, and each of precise control are detected to completely eliminate one
The termination of metal pipe bar, end tail blind area size.
The beneficial effects of the invention are as follows, there is provided the termination end tail monitoring side in a kind of metal pipe bar continuous automatic inspection
Method, metal pipe bar is monitored using eddy current testing device in eddy detection technology to the sensitivity characteristic principle of crack of metal surface
During automatic detection one immediately one be continuously close to the termination end tail of mobile metal pipe bar, be that automatic detection device is carried
For the termination end tail positional information of metal pipe bar, the detection work of detecting instrument is controlled according to this information, eliminate termination end
Tail signal is to the interference effect of detection signal, and each termination of tested metal pipe bar of precise control, end tail blind area size.
The present invention is described in further detail with reference to embodiments, but a kind of metal pipe bar of the invention is continuous certainly
Termination end tail monitoring method in dynamic detection is not limited to embodiment.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the monitoring method schematic diagram of one eddy current probe of use of first embodiment of the invention.
Fig. 2 is the monitoring method schematic diagram of two eddy current probes of use of second embodiment of the invention.
In figure, EP1. eddy current probes, EP2. eddy current probes, E. EDDY CURRENTs, the control of C. automatic detection devices
System processed, the detection sensor of P. automatic detection devices, M. is detected metal pipe bar.
Specific embodiment
Fig. 1 is shown first embodiment, is the termination end tail monitoring side in a kind of metal pipe bar continuous automatic inspection
The first method of method, an eddy current probe EP1 is placed in the entry position of the detection sensor P of automatic detection device；
Eddy current probe EP1 connection eddy current testing instruments E；In automatic detection device, metal pipe bar M roots immediately one tight is detected
The continuous detection sensor P to automatic detection device of patch is moved, when first metal pipe bar M front end reaches automatic detection device
Detection sensor P entry positions eddy current probe EP1 when, entry position eddy current probe EP1 collections send metal tube
To eddy current testing instrument E, eddy current testing instrument E is received after the induced signal of termination to automatic detection device bar M termination induced signals
Control system C send trigger signal, the control system C of automatic detection device according to known to eddy current probe EP1 and oneself
The transmission speed of the distance between detection sensor P arrival ends of motion detection device and metal pipe bar M, control detecting instrument is temporary
Stop detecting one time period of work, when the front end of first metal pipe bar M have passed through the detection sensor P of automatic detection device
The tested metal pipe bar termination blind area for reaching regulation requirement with the detection sensor P port of export distances of automatic detection device afterwards is big
Hour, detecting instrument restarts detection work, and the detection sensor P of automatic detection device starts to detect metal pipe bar M, due to this
When first metal pipe bar M termination have already been through the detection sensor P of automatic detection device, so metal will not be produced
Bar M terminations interference signal；When first end tail and second termination binding face of metal pipe bar M of metal pipe bar M
During the entry position eddy current probe EP1 of the detection sensor P for reaching automatic detection device, entry position eddy current probe
EP1 collections send two metal pipe bar M terminations end tail faying face induced signal to eddy current testing instrument E, and eddy current testing instrument E is received
After to two metal pipe bar M terminations end tail faying face induced signal triggering letter is sent to the control system C of automatic detection device
Number, the detection sensor of control system C eddy current probe EP1 and automatic detection device according to known to of automatic detection device
The transmission speed of the distance between P arrival ends and metal pipe bar M, control detecting instrument pause detection one time period of work,
When the end tail of first metal pipe bar M and the termination binding face of second metal pipe bar M have passed through automatic detection device
The tested metal pipe bar of regulation requirement is reached after detection sensor P with the detection sensor P port of export distances of automatic detection device
During the blind area size of material termination, detecting instrument restarts detection work, and the detection sensor P of automatic detection device starts to detect metal tube
Bar, because now the end tail of first metal pipe bar M and the termination binding face of second metal pipe bar M have already been through
The detection sensor P of automatic detection device, so first the end tail and second metal pipe bar of metal pipe bar M will not be produced
The termination binding face interference signal of material M；The rest may be inferred, whenever entry position eddy current probe EP1 collections send two metals
When bar M terminations end tail faying face induced signal is to eddy current testing instrument E, the control system C control detections of automatic detection device
Instrument pause detection one time period of work, until two metal pipe bar M terminations end tail faying face have passed through automatic detection dress
The tested metal of regulation requirement is reached after the detection sensor P for putting with the detection sensor P port of export distances of automatic detection device
During the blind area size of bar termination, detecting instrument restarts detection work, thus completely eliminates an immediately metal of
The termination of bar, the interference signal of end tail, and each termination of tested metal pipe bar of precise control, end tail blind area are big
It is small.
Fig. 2 is shown second embodiment, is the termination end tail monitoring side in a kind of metal pipe bar continuous automatic inspection
The second method of method, the detection sensor that two eddy current probes EP1, EP2 are respectively placed in automatic detection device enters
Mouthful position and outlet port, the detection sensor P arrival ends of the eddy current probe EP1 of entry position apart from automatic detection device
The distance of the distance in face, the eddy current probe EP2 of outlet port apart from the detection sensor P exit end faces of automatic detection device
It is identical with the tested metal pipe bar termination Duan Wei blind areas size that regulation is required；Two eddy current probes EP1, EP2 connect whirlpool
Stream detector E；In automatic detection device, tested metal pipe bar M mono- immediately one be close to continuous filled to automatic detection
The detection sensor P movements put, when first termination of metal pipe bar M reaches the detection sensor P's of automatic detection device
During the eddy current probe EP1 of entry position, entry position eddy current probe EP1 collections send the sensing of metal pipe bar M terminations
To eddy current testing instrument E, eddy current testing instrument E sends out signal after receiving termination induced signal to the control system C of automatic detection device
Send trigger signal, the control system C control detecting instrument pause detection work of automatic detection device, when first metal pipe bar
When the termination of M reaches the detection sensor P outlet ports eddy current probe EP2 of automatic detection device, outlet port vortex inspection
Probing head EP2 collections send metal pipe bar M termination induced signals to eddy current testing instrument E, and eddy current testing instrument E receives termination sense
After induction signal trigger signal, the control system C control detections of automatic detection device are sent to the control system C of automatic detection device
Instrument restarts detection work, and the detection sensor P of automatic detection device starts to detect metal pipe bar M, due to now first
The termination of metal pipe bar M has already been through the detection sensor P of automatic detection device, so metal pipe bar M will not be produced
Termination interference signal；When the termination binding face arrival of first the end tail and second metal pipe bar M of metal pipe bar M is automatic
During the entry position eddy current probe EP1 of the detection sensor P of detection means, entry position eddy current probe EP1 collections
Two metal pipe bar M terminations end tail faying face induced signal is sent to eddy current testing instrument E, eddy current testing instrument E receives two
Trigger signal is sent to the control system C of automatic detection device after the tail faying face induced signal of metal pipe bar M terminations end, automatically
The control system C control detecting instrument pause detection work of detection means, as the end tail of first metal pipe bar M and second
The termination binding face of metal pipe bar M reaches the detection sensor P outlet ports eddy current probes EP2 of automatic detection device
When, outlet port eddy current probe EP2 collections send two metal pipe bar M terminations end tail faying face induced signal to vortex
Detector E, eddy current testing instrument E are filled after receiving two metal pipe bar M terminations end tail faying face induced signal to automatic detection
The control system C for putting sends trigger signal, and the control system C control detecting instruments of automatic detection device restart detection work, from
The detection sensor P of motion detection device starts to detect metal pipe bar, due to the now end tail of first metal pipe bar M and the
The termination binding face of two metal pipe bar M has already been through the detection sensor P of automatic detection device, so will not be produced
Piece end tail and the second termination binding face interference signal of metal pipe bar M of metal pipe bar M；The rest may be inferred, whenever entering
The eddy current probe EP1 collections of mouth position send two metal pipe bar M terminations end tail faying face induced signal to EDDY CURRENT
During instrument E, the control system C control detecting instrument pause detection work of automatic detection device, whenever outlet port EDDY CURRENT is visited
When head EP2 collections send two metal pipe bar M terminations end tail faying face induced signal to eddy current testing instrument E, automatic detection dress
The control system C control detecting instruments put restart detection work, thus completely eliminate an immediately metal pipe bar of
The termination of material, the interference signal of end tail, and each termination of tested metal pipe bar of precise control, end tail blind area size.
Above-described embodiment is only used for further illustrating the termination in a kind of metal pipe bar continuous automatic inspection of the invention
End tail monitoring method, but invention is not limited to embodiment, it is every above example is made according to technical spirit of the invention
Any simple modification, equivalent variations and modification, each fall within the protection domain of technical solution of the present invention.
Claims (1)
1. the termination end tail monitoring method in a kind of metal pipe bar continuous automatic inspection, it is characterised in that：Using EDDY CURRENT
During eddy current testing device monitors metal pipe bar automatic detection to the sensitivity characteristic principle of crack of metal surface in technology
One immediately one be continuously close to the termination end tail of mobile metal pipe bar, for automatic detection device provides metal pipe bar
Termination end tail positional information, the detection work of detecting instrument is controlled according to this information, eliminates termination end tail signal and detection is believed
Number interference effect, methods described has two methods,
First method is as follows：
One eddy current probe is placed in the entry position of the detection sensor of automatic detection device；Eddy current probe is connected
Eddy current testing instrument；In automatic detection device, tested metal pipe bar one immediately one be close to continuous filled to automatic detection
The detection sensor movement put, when first front end of metal pipe bar reaches the entrance of the detection sensor of automatic detection device
During the eddy current probe of position, eddy current probe collection in entry position sends metal pipe bar termination induced signal to being vortexed inspection
Instrument is surveyed, eddy current testing instrument sends trigger signal after receiving termination induced signal to the control system of automatic detection device, automatically
The control system of detection means is according to known between eddy current probe and the detection sensor arrival end of automatic detection device
Distance and metal pipe bar transmission speed, control detecting instrument pause detection one time period of work, when first metal
The front end of bar have passed through the detection sensor port of export with automatic detection device after the detection sensor of automatic detection device
When distance reaches the tested metal pipe bar termination blind area size of regulation requirement, detecting instrument restarts detection work, automatic detection
The detection sensor of device starts to detect metal pipe bar, due to the termination of now first metal pipe bar have already been through from
The detection sensor of motion detection device, so metal pipe bar termination interference signal will not be produced；When first metal pipe bar
End tail and second metal pipe bar termination binding face reach automatic detection device detection sensor entry position whirlpool
During stream detection probe, eddy current probe collection in entry position sends two metal pipe bar terminations end tail faying face induced signal
To eddy current testing instrument, eddy current testing instrument is received after the tail faying face induced signal of two metal pipe bar terminations end to automatic detection
The control system of device sends trigger signal, the control system of automatic detection device according to known to eddy current probe with it is automatic
The transmission speed of the distance between detection sensor arrival end of detection means and metal pipe bar, control detecting instrument pause inspection
One time period of work is surveyed, when the end tail of first metal pipe bar and the termination binding face of second metal pipe bar have passed through
Regulation requirement is reached after the detection sensor of automatic detection device with the detection sensor port of export distance of automatic detection device
During tested metal pipe bar termination blind area size, detecting instrument restarts detection work, and the detection sensor of automatic detection device is opened
Begin detection metal pipe bar, due to end tail and second termination binding face of metal pipe bar of now first metal pipe bar
Have already been through the detection sensor of automatic detection device, thus will not produce first metal pipe bar end tail and second
The termination binding face interference signal of metal pipe bar；The rest may be inferred, whenever eddy current probe collection in entry position sends two
When metal pipe bar termination end tail faying face induced signal is to eddy current testing instrument, the control system control detection of automatic detection device
Instrument pause detection one time period of work, until two metal pipe bar terminations end, tail faying face have passed through automatic detection device
Detection sensor after with the detection sensor port of export distance of automatic detection device reach regulation requirement tested metal pipe bar
During the blind area size of material termination, detecting instrument restarts detection work, thus completely eliminates an immediately metal pipe bar of
The termination of material, the interference signal of end tail, and each termination of tested metal pipe bar of precise control, end tail blind area size；
Second method is as follows：
Two eddy current probes are respectively placed in the entry position and outlet port of the detection sensor of automatic detection device, are entered
Distance, the vortex of outlet port of the eddy current probe of mouth position apart from the detection sensor entrance face of automatic detection device
The tested metal pipe bar that detection probe is required apart from the distance of the detection sensor exit end face of automatic detection device with regulation
Termination Duan Wei blind areas size is identical；Two eddy current probes connect eddy current testing instrument；In automatic detection device, metal is detected
Immediately the continuous detection sensor to automatic detection device of being close to of is moved bar one, when first metal pipe bar
Termination reach automatic detection device detection sensor entry position eddy current probe when, entry position EDDY CURRENT visit
Head collection sends metal pipe bar termination induced signal to eddy current testing instrument, and it is backward that eddy current testing instrument receives termination induced signal
The control system of automatic detection device sends trigger signal, the control system control detecting instrument pause detection of automatic detection device
Work, when first termination of metal pipe bar reaches the detection sensor outlet port eddy current probe of automatic detection device
When, eddy current probe collection in outlet port sends metal pipe bar termination induced signal to eddy current testing instrument, eddy current testing instrument
After receiving termination induced signal trigger signal, the control system of automatic detection device are sent to the control system of automatic detection device
System control detecting instrument restarts detection work, and the detection sensor of automatic detection device starts to detect metal pipe bar, due to this
When first metal pipe bar termination have already been through the detection sensor of automatic detection device, so metal tube will not be produced
Bar termination interference signal；When hold tail and the termination binding face of second metal pipe bar of first metal pipe bar are reached certainly
During the entry position eddy current probe of the detection sensor of motion detection device, eddy current probe collection in entry position sends two
To eddy current testing instrument, eddy current testing instrument receives two metal pipe bars to root metal pipe bar termination end tail faying face induced signal
After the tail faying face induced signal of termination end trigger signal, the control of automatic detection device are sent to the control system of automatic detection device
System control detecting instrument pause detection work processed, when first end tail and second end of metal pipe bar of metal pipe bar
When head binding face reaches the detection sensor outlet port eddy current probe of automatic detection device, outlet port EDDY CURRENT is visited
Head collection sends two metal pipe bar terminations end tail faying face induced signal to eddy current testing instrument, and eddy current testing instrument receives two
Trigger signal is sent to the control system of automatic detection device after the tail faying face induced signal of root metal pipe bar termination end, automatically
The control system control detecting instrument of detection means restarts detection work, and the detection sensor of automatic detection device starts detection gold
Category bar, because now the end tail of first metal pipe bar and the termination binding face of second metal pipe bar have passed through
The detection sensor of automatic detection device, so first the end tail and second metal pipe bar of metal pipe bar will not be produced
The termination binding face interference signal of material；The rest may be inferred, whenever eddy current probe collection in entry position sends two metal pipe bars
When material termination end tail faying face induced signal is to eddy current testing instrument, the control system control detecting instrument pause of automatic detection device
Detection work, whenever eddy current probe collection in outlet port sends two metal pipe bar terminations end tail faying face induced signal
During to eddy current testing instrument, the control system control detecting instrument of automatic detection device restarts detection work, is thus completely eliminated
Piece immediately termination of the metal pipe bar of, the interference signal of end tail, and a precise control each tested metal pipe bar
The termination of material, end tail blind area size.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510187114.6A CN104777220B (en) | 2015-04-21 | 2015-04-21 | A kind of termination end tail monitoring method in metal pipe bar continuous automatic inspection |
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| CN201510187114.6A CN104777220B (en) | 2015-04-21 | 2015-04-21 | A kind of termination end tail monitoring method in metal pipe bar continuous automatic inspection |
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| CN104777220B true CN104777220B (en) | 2017-06-30 |
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| US10712314B2 (en) * | 2017-09-12 | 2020-07-14 | Tenaris Connections B.V. | Pipe inspection |
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| WO1982002953A1 (en) * | 1981-02-17 | 1982-09-02 | Metals Co Newport | Induction heater for non-destructive thermal test |
| CN102371290A (en) * | 2010-08-06 | 2012-03-14 | 上海龙阳精密复合铜管有限公司 | Online flaw detection process of pipeline forming and machining process |
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| CN102435670A (en) * | 2011-11-30 | 2012-05-02 | 上海易尔电磁技术有限公司 | Method and device for controlling undetectable region at end of metal tube bar |
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