CN1083217A - Adopt the method for stationary magnetic field to the plate of material location - Google Patents
Adopt the method for stationary magnetic field to the plate of material location Download PDFInfo
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- CN1083217A CN1083217A CN 93106322 CN93106322A CN1083217A CN 1083217 A CN1083217 A CN 1083217A CN 93106322 CN93106322 CN 93106322 CN 93106322 A CN93106322 A CN 93106322A CN 1083217 A CN1083217 A CN 1083217A
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- magnetic field
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Adopting the stationary magnetic field is the localization method that is used for determining big plate of material two side positions to the method for plate of material location, it is characterized in that setting up the applied field of stationary magnetic field as plate by alnico magnets or direct solenoid magnetic pole iron, take to measure magnitude of field intensity and magnetic line of force Changing Pattern behind the permeable material plate, determine the accurate position of plate of material both sides.This localization method especially is fit to the location of hull and container light plate, also can determine two side positions of the nonferromugnetic material that other are thicker.
Description
The present invention is the method for location, a kind of plate of material both sides, be fit to determine the corresponding location, two sides of nonferromugnetic material plate and ferrimagnet plate, the accommodation of the thickness of locator material plate is 0～30 millimeter of ferrimagnet plate, 0～300 millimeter of nonferromugnetic material plate, concrete thickness depend on the size of the magnetic permeability of the size of the stationary magnetic field that is applied and material.
Do in the container process industry in shipbuilding industry and pressure, the steel plate weld seam need carry out Non-Destructive Testing, generally takes the method for ray detection.The location of detecting the position in the detection is quite difficult, because of adopting some existing location technologies, as supercritical ultrasonics technology, magnetostriction method, acoustic emission etc., its practicality is very poor, based on this reason, the nondestructive testing personnel of shipbuilding industry and pressure vessel is still adopting the most original hammering method or the rough counter point of apparent size, and its positioning result is inaccurate, poor working environment, anti-worker leads height.
Task of the present invention is definite method that the higher plate of material both sides correspondence position of a kind of scheme, practicality, precision will be provided, and overcomes the also not really practical shortcoming of existing locator meams, as long cable, and large tracts of land coupling, apparatus expensive etc.
Task of the present invention realizes as follows, simply introduces earlier its principle.
In the stationary magnetic field, no matter the medium distribution situation all possesses the principle of continuity of magnetic flux and Ampere circuit law.On two kinds of isotropic medium interphases, the tangential component of its magnetic intensity is continuous, and component also is continuous between the method for magnetic induction density.
For the nonferromugnetic material plate, its magnetic permeability generally can be thought the magnetic permeability that equals vacuum.The stationary magnetic field enters in the plate, and its magnetic line of force distributes, and substantially the same in a vacuum the magnetic line of force distributes in the stationary magnetic field.With respect to the size and location of the stationary magnetic field that is applied, the part magnetic line of force might see through the nonferromugnetic material plate, and can measure the little big and distribution scenario through magnetic field.
For the ferrimagnet plate, its magnetic permeability is greater than the magnetic permeability of vacuum.The stationary magnetic field enters in the plate, change quite big in its magnetic line of force distribution and the vacuum, during the big portion magnetic line of force is poly-in plate, but with respect to the stationary magnetic field that is applied greater than and the position, the small part vertical incidence magnetic line of force, still might see through the ferrimagnet plate, and can measure size and distribution scenario that it sees through magnetic field, its distribution is clocklike.
The technology implementation of task of the present invention is such.In a side of plate of material, adopt a magnetic pole of cylindrical alnico magnets or electromagnet, set up the stationary magnetic field of corresponding field intensity according to locator material and thickness; At the opposite side of material, adopt detecting coil, magnetoelectric conversion element, differential coil or compass, detect the magnetic field size and the magnetic orientation of permeable material.During application, determine position point, take the method for stationary magnetic field and testing element relative motion, measure its existence that sees through magnetic field, size, magnetic to variation.According to the amplitude that sees through magnetic field and magnetic to quick variation and rule thereof, determine the corresponding point position.When for example testing with compass, if anchor point relatively compass when same surface level, the mobile stationary magnetic field that is applied, when magnetic field center during near anchor point, the magnetic pole pointer produces corresponding deflection, and magnetic field center is during corresponding to anchor point, and the magnetic pole pointer will be perpendicular to the plate of material face; When magnetic field center departed from anchor point, the corresponding generation deflection of magnetic sheet pin was promptly moved forward, by former yawing moment deflection, stepped back, by the deflection of former counter deflexion direction.
The present invention aspect the big plate of material ray detection location, has the location fast than existing location technology in as shipbuilding, container manufacturing, maintenance, operation scheme, practicality is good, and the very high characteristics of locating accuracy, this invention can improve detection speed, reduces labour intensity, improves working environment.
Concrete advantage is:
1, in the present technique method, the employing stationary magnetic field applies and sees through two separate systems of magnetic-field measurement, and easy operating is implemented.
2, the present invention does not need to be coupled to detecting the position, takes directly or indirectly plate of material to be applied the stationary magnetic field, and non-contact measurement sees through the analog value in magnetic field.
3, the present invention adopts permanent magnet or DC electromagnet to produce the stationary magnetic field, is fit to location in hull and the container.
4, the present invention can position the ferrimagnet plate, also can position the nonferromugnetic material plate.
5, the present invention takes the relative motion of material both sides, obtains to see through the size and the magnetic orientation in magnetic field, and to record size and the magnetic Changing Pattern location through magnetic field.
Therefore, the present invention is at present unique method for practical hull, tank plate weld seam detection location.Simultaneously, also can determine other raw-material position, as plank, wall etc., and might be as a kind of new lossless detection method.
Claims (4)
1, a kind of stationary magnetic field of adopting is to utilize the applied field of the stationary magnetic field of alnico magnets or the foundation of linear electromagnetic iron as material one side to the method for plate of material location, utilize of the transmission of constant magnetic sheet magnetic field to plate, measure the intensity size that sees through magnetic field and the Changing Pattern of magnetic orientation at the another side of plate of material, and with the method for this definite relevant position.Concrete test adopts needle to point to or detecting coil, and the relative motion of magnetoelectric conversion element and differential winding attracts or variation that cutting magnetic field produces measured value, realizes determining of correspondence position as the variation of direction of current.
2, localization method as claimed in claim 1 is characterized in that taking and the test macro applied field surveyed as plate one of the magnetic pole stationary magnetic field of column type alnico magnets or electromagnet independently.
3, localization method as claimed in claim 1 is characterized in that taking needle, detecting coil, magnetoelectric conversion element and differential winding relative motion, measures the analog value and the Changing Pattern of the stationary magnetic field that sees through the back plate.
4, localization method as claimed in claim 1, it is characterized in that taking to measure through the intensity size in magnetic field and the magnetic line of force situation of change of magnetic field each point, oppositely come the to determine center and the needle of the both sides magnetic line of force dynamically point to definite position on every side to utilize corresponding center, magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93106322 CN1083217A (en) | 1993-05-25 | 1993-05-25 | Adopt the method for stationary magnetic field to the plate of material location |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93106322 CN1083217A (en) | 1993-05-25 | 1993-05-25 | Adopt the method for stationary magnetic field to the plate of material location |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1083217A true CN1083217A (en) | 1994-03-02 |
Family
ID=4986182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93106322 Pending CN1083217A (en) | 1993-05-25 | 1993-05-25 | Adopt the method for stationary magnetic field to the plate of material location |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1083217A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133184A (en) * | 2014-08-18 | 2014-11-05 | 哈尔滨翔科新材料有限公司 | Non-destructive test method and device for average magnetic field intensity of permanent magnet |
| CN106872923A (en) * | 2017-01-17 | 2017-06-20 | 长沙天恒测控技术有限公司 | Light beam positions the device and method of magnetic center |
| CN110749647A (en) * | 2019-10-21 | 2020-02-04 | 杭州西奥电梯有限公司 | Sheet metal part model checking method and system based on conveying line or electronic work order |
-
1993
- 1993-05-25 CN CN 93106322 patent/CN1083217A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133184A (en) * | 2014-08-18 | 2014-11-05 | 哈尔滨翔科新材料有限公司 | Non-destructive test method and device for average magnetic field intensity of permanent magnet |
| CN106872923A (en) * | 2017-01-17 | 2017-06-20 | 长沙天恒测控技术有限公司 | Light beam positions the device and method of magnetic center |
| CN106872923B (en) * | 2017-01-17 | 2019-09-27 | 长沙天恒测控技术有限公司 | The device and method of light beam positioning magnetic center |
| CN110749647A (en) * | 2019-10-21 | 2020-02-04 | 杭州西奥电梯有限公司 | Sheet metal part model checking method and system based on conveying line or electronic work order |
| CN110749647B (en) * | 2019-10-21 | 2022-11-25 | 杭州西奥电梯有限公司 | Sheet metal part model checking method and system based on conveying line or electronic work order |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |