CN105823723A - Device and method for detecting corrosion circumferential magnetic flux leakage of inner surface of body of buried storage tank of filling station - Google Patents
Device and method for detecting corrosion circumferential magnetic flux leakage of inner surface of body of buried storage tank of filling station Download PDFInfo
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Abstract
The invention relates to a device and method for detecting corrosion circumferential magnetic flux leakage of the inner surface of a body of a buried storage tank of a filling station .The device can automatically walk in the circumferential direction of the inner surface of the body of the storage tank and conduct magnetic flux leakage detection .The method has the advantage of being wide in application range .According to the technical scheme, the device for detecting corrosion circumferential magnetic flux leakage of the inner surface of the body of the buried storage tank of the filling station comprises a frame and a traction drive assembly .A magnetizing structure assembly and a magnetic-electric signal conversion and positioning assembly are installed on the frame .The method for detecting corrosion circumferential magnetic flux leakage of the inner surface of the body of the buried storage tank of the filling station includes the following steps of 1, a calibration stage, wherein the detection device runs on a calibration plate customized with an artificial standard defect, and finally a detection calibration curve of each magnetic sensor is obtained; 2, a detection stage, wherein the detection device runs in the body of the buried storage tank of the filling station, the body and the calibration plate are in the same thickness and are made of the same material, and corrosion defect equivalents of the detected storage tank are obtained by comparing the detection standard curves of the magnetic sensors.
Description
Technical field
The present invention relates to buried tank detection technique field, gas station, specifically a kind of gas station buried tank tank
Internal surface corrosion circumference leakage magnetic detection device and method, be applicable to the horizontal appearance of some specific curvature
Device and the detection of tank car.
Background technology
How wide gas station's buried tank amount is, generally uses direct-buried mode to arrange, owing to tank material can not be kept away
The defects such as the appearance exempted from is aging, corrosion, easily cause dielectric leakage, add sunken tank disguise and
Particularity, it is easier to cause serious economy and social loss.Danger due to buried tank storage medium
And space limits employing and cannot meet conventional Ultrasound detection, Magnetic testing skill lossless detection method to tested surface
The requirement of grinding process to be carried out, therefore conventional lossless detection method cannot realize carrying out storage tank the most entirely
Face is detected, and causes buried tank to be constantly in the edge zone of detection technique, and China also lacks effectively simultaneously
Sunken tank safety detection monitoring technology and detecting instrument equipment.Therefore, buried tank also exists safety detection
Technology blind area.
Summary of the invention
It is an object of the invention to overcome the deficiency of above-mentioned background technology, it is provided that a kind of gas station buried tank tank body
Inside corrosion circumference leakage magnetic detection device and method, this device should be able to be along the circumference of storage tank tank inner surface
Automatically walk and carry out Magnetic Flux Leakage Inspecting, having the advantages that detection efficiency is high, manpower and materials consumption is few；The method
There is feature applied widely, that testing cost is low.
Present invention provide the technical scheme that
A kind of gas station buried tank tank inner surface corrosion circumference leakage magnetic detection device, it is characterised in that this dress
Put the traction drive assembly including framework and driver framework, described framework is installed with and is existed by magnetic attraction
Tested storage tank tank inner surface and tested storage tank tank inner surface is carried out magnetized magnetization configuration assembly and right
Storage tank tank inner surface carries out the magnetic-electricity detected " signal conversion and positioning component；
Described framework by fixed connecting frame frame and respectively two ends with fixed connecting frame frame fix two be connected
Flank fixed plate forms；
Described traction drive assembly includes driving castor and being driven the driving electricity driving castor by decelerator
Machine；
Described magnetization configuration assembly includes two groups of walking castors and the composition magnetic bridge being fixed in flank fixed plate
The armature of structure, permanent magnet and pole shoe；This magnetization configuration assembly forms the curved surface knot meeting a certain specific curvature
Structure, this specific curvature is identical with the curvature of tested buried tank tank inner surface；
Described magnetic-electricity " signal conversion includes, with positioning component, the biography that is positioned on armature by height adjustment assembly
Sensor array group, for deriving the sensor array group detection transfer connector of data and being used for determining detecting position
The encoder positioning component put；Described encoder positioning component includes being fixed on rank by encoder fixed support
On ferrum and for determining the position encoder of detection position and driving the encoder travelling gear of position encoder
Group.
Before and after described, two groups of walking castors are rotatably positioned two by the support shaft being arranged parallel to respectively
In individual flank fixed plate, described magnetization configuration assembly is arranged between before and after two groups walking castor, wherein armature
Two ends, left and right fixing with two flank fixed plates be the most respectively connected.
Described sensor array group is positioned between two pole shoes by sensor array group installing plate；Described height
Degree adjusting part includes that bottom is fixed on two adjusting screw rods at the sensor array group installing plate back side, two tune
Joint screw rod is coated with altitude mixture control spring the most respectively and top up pass over armature after distinguish one by one with two again
Individual altitude mixture control nut screwing clamping is fixed.
The diameter of the described diameter driving castor and front and back two groups of walking castors is the most identical, and drives castor
Axis and the axis of two support shafts exist together a certain specific curvature, this specific curvature and tested buried horizontal storage
The curvature of tank inwall is identical.
The displacement data of walking castor is passed to encoder by described encoder driving gear set, so that encoder
Rotation Tong Bu with the walking of magnetization configuration assembly.
Described driving castor and walking castor are and are cladded with polyurethane rubber-covered layer with the antimagnetizing preventing castor from skidding
Wheel hub.
A handle is also fixed on described framework.
In described sensor array group use Magnetic Sensor be Hall element, Hall element relative to
Detection faces is horizontally disposed, in order to detect magnetic leakage signal；The separation distance from each other of Hall element is 5mm-7mm,
Multiple Hall elements form the length of sensor array group.
A kind of gas station buried tank tank inner surface corrosion circumference flux-leakage detection method, comprises the following steps:
(1) calibration phase: by detection plant running on the scaling board being custom made with labor standard defect, this mark
Determining plate with three groups of defects, often group is respectively 4 circles of 20%, 40%, 60%, 80% containing the degree of depth/thickness of slab
Shape defect, defect is spaced apart 60mm；The axial direction often organizing defect is spaced apart 0.3d, and circumferential direction is spaced apart
120mm；Magnetic Sensor group is uniformly divided into three groups, left, center, right demarcate respectively, at timing signal, will
That group defect in the middle of the centre position alignment scaling board of array of magnetic sensors group；Can obtain each after demarcation
The characteristic signal values of 20%, 40%, 60%, 80% 4 defect on scaling board corresponding to sensor, according to three
The packet of group sensor, being characterized sensor with that sensor that characteristic signal values in each group is maximum can be true
Fixed three feature sensors；Lack according to obtain from scaling board four of each feature sensor of linear fit
The characteristic signal values fallen into can obtain the detection calibration curve of each feature sensor；By every stack features sensor
Detection calibration curve be assigned to other sensors in this group, finally give each Magnetic Sensor detection demarcate
Curve；
(2) detection-phase: detection plant running is buried in the gas station of material identical with scaling board same thickness
Ground Tank body in, Magnetic Sensor group obtain Magnetic Flux Leakage Inspecting digital signal, to these Digital Signal Processing and point
The magnetic leakage signal of the recognizable corrosion default of analysis；I.e. obtain tested by the detection calibration curve of comparison Magnetic Sensor
The corrosion default equivalent of storage tank.
The step of described Digital Signal Processing is:
(1) signal is carried out first-order difference and processes y1 (n)=x (n)-x (n-1)；
(2) signal is carried out low-pass digital filter and processes y2 (n)=y1 (n) * h1 (n)；
(3) signal is carried out reverse process y3 (n)=y2 (N-1-n)
(4) signal is carried out high-pass digital and processes y4 (n)=y3 (n) * h2 (n)；
(5) signal is carried out reverse process y (n)=y4 (N-1-n)；
Wherein x (n) is the original series of signal, and N is the sequence length of signal, and h1 (n) is low-pass digital filter
Device impact corresponding sequence, h2 (n) is that high-pass digital filter impacts corresponding sequence, and y (n) is output result sequence.
The invention has the beneficial effects as follows: gas station's buried tank tank body leakage field that the present invention provides scans magnetic automatically
Gasifying device can have magnetizing function along the walking automatically of the circumference of storage tank shell and signal convert and transfer function,
Thus detection efficiency is high, manpower and materials consume less, testing cost is low；Described method can be widely applied to steel
The detection (applied widely) of buried tank, horizontal vessel and tank car, testing cost is the lowest.
Figure explanation
Fig. 1 is the perspective view of the present invention.
Fig. 2 is the perspective view of the magnetization configuration assembly of band specific curvature in the present invention.
Fig. 3 is the perspective view of encoder positioning component in the present invention.
Fig. 4 is the perspective view of traction drive assembly in the present invention.
Fig. 5 is the scaling board structural representation being matched in the present invention.
Figure has: drive castor 1, handle 2, decelerator 3, drive motor 4, fixed connecting frame frame 5, side
Wing fixed plate 6, castor 7 of walking, encoder driving gear set 8, position encoder 9, encoder data line
10, encoder fixed support 11, organize altitude mixture control nut 12, data cable connector 13, armature 14, support
Axle 15, pole shoe 16, sensor array group 17, permanent magnet 18, altitude mixture control spring 19, encoder shaft coupling
Joint 20, scaling board 21, circular flaw 22, adjusting screw rod 23.
Detailed description of the invention
For ensureing the safe operation of sunken tank and providing technical support for security control, leakage field is examined by the present invention
Survey technology introduces in sunken tank detection, it is provided that a kind of gas station buried tank tank inner surface corrosion circumference
Leakage magnetic detection device and method.
Described gas station's buried tank tank inner surface corrosion circumference leakage magnetic detection device is mainly used in steel
The detection of buried tank, horizontal vessel and tank car, the basic function of device is the circumference walking automatically along storage tank
Function, magnetizing function and signal convert and transfer function.Because work wall is buried tank inner wall surface,
And it is detected as the general census on tank skin surface, and need area of detection relatively big, working environment is the most more complicated, therefore
Gas station buried tank tank inner surface corrosion circumference leakage magnetic detection device and method should meet following some want
Ask:
(1) certain driving force should be kept, it is possible to make robot automatically walk on inner tank surface wall；
(2) should have hard magnetization ability, Magnetic Flux Leakage Inspecting needs additional high-intensity magnetic field to realize the magnetic to examined workpiece
Changing, high-intensity magnetic field can also provide enough absorption affinities simultaneously, and anti-locking apparatus falls when walking along storage tank shell；
(3) conversion and the transmission of defect and magnetic leakage detection signal should be able to be realized.
Below in conjunction with description figure, the invention will be further described, but the invention is not limited in following reality
Execute example.
As shown in Figure 1 and Figure 2, gas station of the present invention buried tank tank body leakage field scans magnetization dress automatically
Put and include magnetization configuration assembly (the magnetization configuration assembly of band specific curvature), magnetic-electricity " signal conversion with location
Assembly and traction drive assembly；Wherein, magnetic-electricity " signal is changed and positioning component includes by altitude mixture control group
(encoder positions for sensor array assembly that part is positioned on armature, transfer connector, encoder positioning component
Assembly includes position encoder and encoder driving gear set).Described magnetization configuration assembly is by forming magnetic bridge
The armature 14 of structure, permanent magnet 18, pole shoe 16 and flank fixed plate 6, walking castor 7, walking castor
Support shaft 15 collectively constitutes that (wherein armature 14 is the curved-surface structure meeting a certain specific curvature, two pole shoes
It is fixed on two ends before and after armature by permanent magnet respectively, forms bridge architecture), whole magnetic bridge structure is fixed on
In flank fixed plate 6 (base of flank fixed plate is preferably identical with the curvature of tested tank body), by wearing
Walking castor 7 in support shaft 15 realizes walking (as shown in Figure 1)；Walking in magnetization configuration assembly
Castor is (the most a diameter of with inner surface in tested Tank body with the driving castor in traction drive assembly
The cylinder of 2450mm) phase inscribe, make device can make circumference along the inner surface cylindrically playing storage tank tank body and move
Dynamic, also can change the radius of curvature of magnetic bridge structure as required, to adapt to table in different size storage tank or tank car
Face circumference detection.
Described magnetic-electricity " signal conversion includes, with positioning component, the biography that is positioned on armature by height adjustment assembly
Sensor array group 17, for deriving the sensor array group detection transfer connector of data and being used for determining detection
The encoder positioning component of position；By sensor array group, the defect magnetic flux leakage field detected is converted into and can enter
The signal of telecommunication of row computer disposal, and pass through transfer connector and data transmission line to outside processing terminal
It is analyzed and processes.
The Magnetic Sensor that described sensor array group uses is Hall element, and Hall element is relative to detection
Face is horizontally disposed, is used for detecting magnetic leakage signal；Hall sensor array arrangement be spaced apart 5mm-7mm, many
Individual Hall element forms the array length of Magnetic Sensor group (i.e. sensor array group)；These are routine
Configuration structure.
The structure of described height adjustment assembly is: two adjusting screw rods 23 wear altitude mixture control spring 19 respectively,
The bottom of two adjusting screw rods is fixed on the sensor array group installing plate back side, and top the most up passes over rank
Tighten fixing with two altitude mixture control nuts 12 the most one by one after ferrum.Obviously, two altitude mixture control spiral shells are turned
Mother, sensor array group will move up and down, thus changes with the distance of tested tank surface.
Described encoder positioning component includes being fixed on armature for determining by encoder fixed support 11
The position encoder 9 of detection position and the encoder driving gear set 8 of driving position encoder (can in Fig. 3
See that encoder driving gear set includes being fixed on driving gear 8-1 and and the driving gear of walking castor end face
The driven gear 8-2 of engagement, driven gear is fixed on encoder axle 8-3 by encoder coupling 20),
The displacement data of walking castor is passed to encoder by described encoder driving gear set, then by encoder number
According to line 10, position signalling is transferred to transfer connector, so that the rotation of encoder and the walking of magnetization configuration assembly
Synchronize, thus realize the location of defect during detection.
Described traction drive assembly includes driving castor 1 and being driven the driving driving castor by decelerator 3
Motor 4.In Fig. 4 show: direct-drive motor, decelerator (worm type of reduction gearing), drive castor with
And for placing and mention the handle 2 of whole device, be each attached on fixed connecting frame frame 5.
For detection accurately, need advanced rower before detection fixed.Scaling board shown in accompanying drawing 5 be 21 (band curvature
Scaling board), curvature is identical with the curvature of the inner surface of tested storage tank tank body；Circular flaw 22 on scaling board plate
It is previously known, so by the detection to scaling board, the performance of Magnetic Flux Leakage Inspecting of the present invention can be tested.
Owing to magnetization configuration assembly is with certain curvature, in array of magnetic sensors horizontal distribution, exist certain
Magnetic field bump, therefore determine that the calibration curve of all the sensors exists relatively with traditional once demarcation
Big error.In order to reduce this error, Magnetic Sensor group is uniformly divided into three groups, left, center, right and carries out respectively
Demarcate, demarcate three groups of sensors in order to the most disposable, use the scaling board with three groups of defects to demarcate.
In view of interference to signal between defect, three groups of defects are the most all being spaced in intervals.
At timing signal, the centre position of array of magnetic sensors group is directed at that middle group defect.Can obtain after demarcation
Obtain the characteristic signal values of 20%, 40%, 60%, 80% 4 defect corresponding to each sensor, formed each
Detection calibration curve and the slope of curve of matching.By each sensing in the Magnetic Sensor of three groups, left, center, right
The slope of curve that the final detection calibration curve of device is set to each packet is that maximum calibration curve.
The using method of the present invention comprises the following steps:
(1) calibration phase: by detection plant running on the scaling board being custom made with labor standard defect, this mark
Determining plate with three groups of defects, often group is respectively 4 circles of 20%, 40%, 60%, 80% containing the degree of depth/thickness of slab
Shape defect, defect is spaced apart 60mm.The axial direction often organizing defect is spaced apart 0.3d, and circumferential direction is spaced apart
120mm.Magnetic Sensor group is uniformly divided into three groups, left, center, right demarcate respectively, at timing signal, will
That group defect in the middle of the centre position alignment scaling board of array of magnetic sensors group.Can obtain each after demarcation
The characteristic signal values of 20%, 40%, 60%, 80% 4 defect on scaling board corresponding to sensor, according to three
The packet of group sensor, is characterized sensor with that sensor that characteristic signal values in each group is maximum, thus
Determine three feature sensors.According to each feature sensor of linear fit obtain from scaling board four
The characteristic signal values of defect can obtain the detection calibration curve of each feature sensor.Every stack features is sensed
The detection calibration curve of device is assigned to other sensors in this group, finally gives the detection mark of each Magnetic Sensor
Determine curve.
(2) detection-phase: detection plant running is buried in the gas station of material identical with scaling board same thickness
In ground Tank body, Magnetic Sensor group obtains Analysis of Magnetic Flux Leakage Testing Signals, outside being transported to by transfer connector and data wire
The computer of portion's processing terminal, carries out signal processing and analyzing, identifies the magnetic leakage signal of corrosion default.Pass through
The detection calibration curve of Magnetic Sensor obtains the corrosion default equivalent of tested storage tank.
The step of described signal processing is:
(1) signal is carried out first-order difference and processes y1 (n)=x (n)-x (n-1)；
(2) signal is carried out low-pass digital filter and processes y2 (n)=y1 (n) * h1 (n)；
(3) signal is carried out reverse process y3 (n)=y2 (N-1-n)
(4) signal is carried out high-pass digital and processes y4 (n)=y3 (n) * h2 (n)；
(5) signal is carried out reverse process y (n)=y4 (N-1-n).
Wherein x (n) is the original series of signal, and N is the sequence length of signal, and h1 (n) is low-pass digital filter
Device impact corresponding sequence, h2 (n) is that high-pass digital filter impacts corresponding sequence, and y (n) is output result sequence.
In view of Magnetic Flux Leakage Inspecting technology is ripe and application, therefore Cleaning Principle is the most carefully stated.
In the present invention, the equal buyable of all of components and parts obtains.
Claims (10)
1. gas station's buried tank tank inner surface corrosion circumference leakage magnetic detection device, it is characterised in that should
Device includes the traction drive assembly of framework and driver framework, and described framework is installed with by magnetic force and quilt
Inspection storage tank tank inner surface adhesive and tested storage tank tank inner surface is carried out magnetized magnetization configuration assembly and
Magnetic-electricity that storage tank tank inner surface is detected " signal conversion and positioning component；
Described framework by fixed connecting frame frame (5) and respectively two ends with fixed connecting frame frame fix and be connected
Two flank fixed plate (6) compositions；
Described traction drive assembly includes driving castor (1) and driving driving castor by decelerator (3)
Driving motor (4)；
Described magnetization configuration assembly includes two groups of walkings castor (7) and the composition being fixed in flank fixed plate
The armature (14) of magnetic bridge structure, permanent magnet (18) and pole shoe (16)；This magnetization configuration assembly forms symbol
Close the curved-surface structure of a certain specific curvature, this specific curvature and the curvature of tested buried horizontal tank inner tank wall
Identical；
Described magnetic-electricity " signal conversion includes, with positioning component, the biography that is positioned on armature by height adjustment assembly
Sensor array group (17), for derive sensor array group detection data transfer connector (13) and use
In the encoder positioning component determining detection position；Described encoder positioning component includes being fixed by encoder
Support (11) is fixed on armature and for determining the position encoder (9) of detection position and driving location
The encoder driving gear set (8) of encoder.
Gas station's buried tank tank inner surface corrosion circumference leakage magnetic detection device the most according to claim 1,
It is characterized in that: before and after described, two groups of walking castors respectively can by the support shaft (15) being arranged parallel to
Being positioned at rotationally in two flank fixed plates, described magnetization configuration assembly is arranged on before and after two groups walking castor
Between, wherein the two ends, left and right of armature are fixing with two flank fixed plates the most respectively is connected.
Gas station the most according to claim 1 or claim 2 buried tank tank inner surface corrosion circumference Magnetic Flux Leakage Inspecting
Device, it is characterised in that: described sensor array group is positioned at two poles by sensor array group installing plate
Between boots；Described height adjustment assembly includes that bottom is fixed on two tune at the sensor array group installing plate back side
Joint screw rod (23), two adjusting screw rods are coated with altitude mixture control spring (19) and top up the most respectively
Tighten fixing with two altitude mixture control nuts (12) one by one respectively again after passing over armature.
Gas station's buried tank tank inner surface corrosion circumference leakage magnetic detection device the most according to claim 3,
It is characterized in that: the diameter of the described diameter driving castor and front and back two groups of walking castors is the most identical, and
The axis driving the axis of castor and two support shafts exists together a certain specific curvature, and this specific curvature is buried with tested
The curvature of ground horizontal tank inner tank wall is identical.
Gas station's buried tank tank inner surface corrosion circumference leakage magnetic detection device the most according to claim 4,
It is characterized in that: the displacement data of walking castor is passed to encoder by described encoder driving gear set, with
The rotation making encoder is Tong Bu with the walking of magnetization configuration assembly.
Gas station's buried tank tank inner surface corrosion circumference leakage magnetic detection device the most according to claim 5,
It is characterized in that: described driving castor and walking castor are and are cladded with polyurethane rubber-covered layer to prevent castor from skidding
Antimagnetizing wheel hub.
Gas station's buried tank tank inner surface corrosion circumference leakage magnetic detection device the most according to claim 6,
It is characterized in that: on described framework, also fix a handle (2).
Gas station's buried tank tank inner surface corrosion circumference leakage magnetic detection device the most according to claim 7,
It is characterized in that the Magnetic Sensor used in described sensor array group is Hall element, Hall element
Horizontally disposed relative to detection faces, in order to detect magnetic leakage signal；The separation distance from each other of Hall element is
5mm-7mm, multiple Hall elements form the length of sensor array group.
9. gas station's buried tank tank inner surface corrosion circumference flux-leakage detection method, comprises the following steps:
(1) calibration phase: by detection plant running on the scaling board (22) being custom made with labor standard defect,
This scaling board with three groups of defects, often group be respectively containing the degree of depth/thickness of slab 20%, 40%, 60%, 80% 4
Individual circular flaw, defect is spaced apart 60mm；The axial direction often organizing defect is spaced apart 0.3d, between circumferential direction
It is divided into 120mm；Magnetic Sensor group is uniformly divided into three groups, left, center, right demarcate respectively, at timing signal,
The centre position of array of magnetic sensors group is directed at that group defect in the middle of scaling board (22)；After demarcation permissible
Obtain the characteristic signal values of 20%, 40%, 60%, 80% 4 defect on scaling board corresponding to each sensor,
According to the packet of three groups of sensors, it is characterized sensor with that sensor that characteristic signal values in each group is maximum
May determine that three feature sensors；According to obtaining from scaling board of linear fit each feature sensor
The characteristic signal values of four defects can obtain the detection calibration curve of each feature sensor；By every stack features
The detection calibration curve of sensor is assigned to other sensors in this group, finally gives the inspection of each Magnetic Sensor
Survey calibration curve；
(2) detection-phase: detection plant running is buried in the gas station of material identical with scaling board same thickness
Ground Tank body in, Magnetic Sensor group obtain Magnetic Flux Leakage Inspecting digital signal, to these Digital Signal Processing and point
The magnetic leakage signal of the recognizable corrosion default of analysis；I.e. obtain tested by the detection calibration curve of comparison Magnetic Sensor
The corrosion default equivalent of storage tank.
Gas station's buried tank tank inner surface corrosion circumference Magnetic Flux Leakage Inspecting side the most according to claim 9
Method, it is characterised in that the step of described Digital Signal Processing is:
(1) signal is carried out first-order difference and processes y1 (n)=x (n)-x (n-1)；
(2) signal is carried out low-pass digital filter and processes y2 (n)=y1 (n) * h1 (n)；
(3) signal is carried out reverse process y3 (n)=y2 (N-1-n)
(4) signal is carried out high-pass digital and processes y4 (n)=y3 (n) * h2 (n)；
(5) signal is carried out reverse process y (n)=y4 (N-1-n)；
Wherein x (n) is the original series of signal, and N is the sequence length of signal, and h1 (n) is low-pass digital filter
Device impact corresponding sequence, h2 (n) is that high-pass digital filter impacts corresponding sequence, and y (n) is output result sequence.
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| CN107300584A (en) * | 2017-07-05 | 2017-10-27 | 黄冈职业技术学院 | Corrosion of steel structure Magnetic sensing methods in a kind of armored concrete |
| CN109187733A (en) * | 2018-09-12 | 2019-01-11 | 湖北工业大学 | Large-scale storage tank tank skin defect detecting device |
| CN109884171A (en) * | 2019-04-12 | 2019-06-14 | 中国石油化工股份有限公司 | A kind of operation location structure for plate Magnetic Flux Leakage Inspecting |
| CN109975426A (en) * | 2017-12-28 | 2019-07-05 | 核动力运行研究所 | A kind of positioning apparatus for circumferential direction and method of large-diameter cylinder body inner wall ultrasonic detection equipment |
| CN110208366A (en) * | 2019-06-21 | 2019-09-06 | 西红柿科技（武汉）有限公司 | A kind of integrated form Energizing unit for Magnetic Flux Leakage Inspecting |
| CN113051325A (en) * | 2021-03-25 | 2021-06-29 | 陕西延长石油（集团）有限责任公司 | Storage tank detection data display analysis method, system, medium, equipment and application |
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