CN102520380B - Mapping method of magnetoelectric loop wire of magnetoelectric material - Google Patents
Mapping method of magnetoelectric loop wire of magnetoelectric material Download PDFInfo
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- CN102520380B CN102520380B CN 201110421012 CN201110421012A CN102520380B CN 102520380 B CN102520380 B CN 102520380B CN 201110421012 CN201110421012 CN 201110421012 CN 201110421012 A CN201110421012 A CN 201110421012A CN 102520380 B CN102520380 B CN 102520380B
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Abstract
The invention relates to a m magnetoelectric material, especially to a mapping method of a magnetoelectric loop wire of a magnetoelectric material. Mapping is carried out on a series of alternating magnetoelectric signals that include amplitudes and phases as well as are measured by under a direct current magnetic field and are stored in a text file in a way of a polar coordinate and a rectangular coordinate, and a polar coordinate plate can be called as a signal complex plane; an interference vector generated by Faraday induction of a lead wire is determined as well as interference vector deduction is carried out on the magnetoelectric signals measured at all the direct current magnetic fields, so that rectified magnetoelectric signals are obtained; and mapping is again carried out on the magnetoelectric signals that have been processed by the interference vector deduction in the complex plane as well as any point is taken on a vertical symmetric axis of a magnetoelectric 8-shaped loop wire to arrange the size of an overturned phase; according to the overturned phase, a magnetoelectric signal that is arranged above the overturned phase is a positive one and a magnetoelectric signal that is arranged below the overturned phase is a negative one; and the magnetoelectric signals that have been arranged with positive and negative properties are used to form a vertical coordinate and the direct current magnetic fields are used to form a horizontal coordinate, so that a magnetoelectric loop wire is obtained by mapping.
Description
Technical field
The present invention relates to magnetoelectric material, especially relate to a kind of drawing method of magnetoelectric material magnetoelectric loop wire.
Background technology
Magnetoelectric effect is that some many iron property compounds and ferroelectric/ferromagnetic composite material are applied the physical influence that magnetic field produces electric field, and the material with magnetoelectric effect is referred to as magnetoelectric material.At present, the method that the measurement magnetoelectric effect is generally adopted is dynamic method, detailed process is with the magnetic field of a direct current magnetoelectric material to be setovered, and in less alternation perturbation magnetic field of D.C. magnetic field stack, measures voltage or the charge signal that produce on the magnetoelectric material this moment again.Because ferromagnetic magnetostriction behavior and D.C. magnetic field orientation independent, so the size of magnetoelectric effect is symmetrical along with the change curve of D.C. magnetic field.Moreover, because the break-in meeting of D.C. magnetic field causes 180 ° of upsets of magnetoelectricity signal phase, therefore although the signal of the magnetoelectric effect that measures of dynamic method is alternation, there be not positive and negative dividing, but can define the positive and negative of magnetoelectric effect by its phase place, thereby make the magnetoelectric loop wire of the similar magnetic hysteresis loop of shape.Magnetoelectric loop wire is to have defined positive and negative magnetoelectricity signal afterwards along with the variation relation of D.C. magnetic field.
In the actual measurement process of dynamic method, because the lead-in wire of magnetoelectric material also is in the perturbation magnetic field of alternation, the loop that lead-in wire consists of is equivalent to the coil of an individual pen in magnetic field, so the lead-in wire of magnetoelectric material can be introduced some undesired signals.According to Faraday's law of induction, coil will produce induced voltage in alternating magnetic field.So measured signal does not only comprise merely the voltage signal that magnetoelectric effect produces, faraday's induced voltage signal of the lead-in wire that usually also superposeed.When the magnetoelectricity voltage signal is fainter, it is very remarkable that the impact of faraday's induced voltage signal will become, therefore often find that measured signal along with the variation of D.C. magnetic field has demonstrated the asymmetry of runing counter to physical principle, is difficult to truly describe magnetoelectric effect with the variation relation of D.C. magnetic field.
When utilizing dynamic method to measure magnetoelectric effect, magnetoelectric material also exists the problem how magnetoelectric loop wire is drawn.At present, general disposal route is in the world: when magnetoelectricity signal and perturbation magnetic field same-phase, the size of magnetoelectricity signal just is set to, and is negative during antiphase.The applicant discloses a kind of magnetoelectric loop wire test method and device thereof of continuously applying scanning magnetic field in Chinese patent CN101788653A, a kind of simple disposal route is proposed, be magnetoelectricity signal and perturbation magnetic field phase differential greater than 0 o'clock for just, less than 0 o'clock for negative, for the higher measurement occasion of signal to noise ratio (S/N ratio), has preferably result of use.If but undesired signal is stronger in measuring, the magnetoelectricity signal of the undesired signal that superposeed is difficult to have simply homophase and anti-phase relation with perturbation magnetic field, will be difficult to find a critical upset phase place, draws magnetoelectric loop wire very difficult.
Summary of the invention
The object of the invention is to provides a kind of drawing method of magnetoelectric material magnetoelectric loop wire for the mapping of the existing magnetoelectric material magnetoelectric loop wire problem such as difficulty relatively.
The present invention includes following steps:
A series of alternating magnetoelectric signals that comprise amplitude and phase place that record under D.C. magnetic field that 1) will be kept in the text are figure with the mode of polar coordinates and rectangular coordinate, and the polar coordinates plane also can be described as the signal complex plane;
2) faraday who judges lead-in wire responds to the interference vector of generation and the magnetoelectricity signal that records under each D.C. magnetic field is deducted the magnetoelectricity signal after obtaining correcting;
3) will deduct interference vector magnetoelectricity signal afterwards maps at complex plane again, the perpendicular axis of symmetry of magnetoelectricity 8 word loop lines take up an official post get any arrange the upset phase place size, according to the upset phase place, setting is positioned at the above magnetoelectricity signal of upset phase place for just, the following magnetoelectricity signal of upset phase place is set for negative, positive and negative magnetoelectricity signal to be set as ordinate, D.C. magnetic field is horizontal ordinate, and mapping obtains magnetoelectric loop wire.
In step 1) in, described alternating magnetoelectric signal comprises the magnetoelectric loop wire data of time, magnetic field, amplitude and phase data; The described concrete grammar of being figure with polar coordinates is: under polar coordinates, a pair of data under each magnetic field, comprise voltage signal amplitude R and phase theta, a point (R in the corresponding polar coordinates, θ), according to the Measuring Time order, the point that each phase place under different magnetic field and amplitude is corresponding links to each other, and obtains the magnetoelectric loop wire under the original undressed polar coordinate system; The described concrete grammar of being figure with rectangular coordinate is: under rectangular coordinate system, each comprises amplitude and magnetic field to data, a point in the corresponding rectangular coordinate system, according to the Measuring Time order all points are linked to each other, obtain the magnetoelectric loop wire under the original undressed rectangular coordinate system.
When the present invention adopts dynamic method to measure the magnetoelectric material magnetoelectric effect with the variation relation of D.C. magnetic field, the alternating magnetoelectric signal that comprise amplitude and phase place of original signal under a series of D.C. magnetic fields, recording.Technical scheme of the present invention is that the alternating magnetoelectric signal that comprises amplitude and phase place is mapped in complex plane, then the faraday who deducts lead-in wire in complex plane responds to the undesired signal that produces, obtain pure magnetoelectricity signal, select at last the horizontal symmetrical center line of magnetoelectricity signal pattern as critical upset phase place, the magnetoelectricity signal is carried out positive and negative upset, obtain the magnetoelectric loop wire of contour smoothing.
Compare with the drawing method of existing magnetoelectric material magnetoelectric loop wire, the present invention has following outstanding advantages:
1) under complex plane, the undesired signal that the faraday who more easily observes lead-in wire the responds to generation effect after the magnetoelectricity signal that is added to is convenient to judge and obtain interference vector.
2) under complex plane, more easily observe the symmetry of magnetoelectricity signal, be convenient to obtain the upset phase place.
3) analysis and the rectification under the employing complex plane, the impact of having deducted undesired signal has obtained pure alternating magnetoelectric signal.
4) to fainter magnetoelectricity signal, also can obtain the magnetoelectric loop wire of contour smoothing.
Description of drawings
Fig. 1 is the magnetoelectric loop wire under the undressed polar coordinate system.
Fig. 2 is the magnetoelectric loop wire under the undressed rectangular coordinate system.In Fig. 2, horizontal ordinate is magnetic field (T), and ordinate is voltage (V).
Fig. 3 is for removing the magnetoelectric loop wire under the polar coordinate system behind faraday's inductive disturbance vector.
Fig. 4 is for removing the magnetoelectric loop wire under the rectangular coordinate system behind faraday's inductive disturbance vector.In Fig. 4, horizontal ordinate is magnetic field (T), and ordinate is voltage (V).
Fig. 5 is the data figure line contrast after data figure line after list of references [3] simple process and the present invention process.In Fig. 5, horizontal ordinate is magnetic field (T), and ordinate is voltage (V); Curve 1 is the data figure line after list of references [3] simple process, and curve 2 is the data figure line of the present invention after processing.
Embodiment
The present invention is further illustrated in connection with accompanying drawing for following examples.
Concrete grammar of the present invention is as follows:
1) will be kept in the text and need the magnetoelectric loop wire data that comprise time, magnetic field, amplitude and phase data to be processed under polar coordinates, rectangular coordinate system, map.Under polar coordinates, a point (R in the corresponding polar coordinates of a pair of data under each magnetic field (voltage signal amplitude R and phase theta), θ), according to the Measuring Time order, the point that each phase place under different magnetic field and amplitude is corresponding links to each other, and has just obtained the magnetoelectric loop wire (such as Fig. 1) under the original undressed polar coordinate system.Under rectangular coordinate system, each links to each other all points according to the Measuring Time order to a point in the corresponding rectangular coordinate system of data (amplitude and magnetic field), just obtains the magnetoelectric loop wire (such as Fig. 2) under the original undressed rectangular coordinate system.Under polar coordinates, the center of curve is at the polar coordinates initial point, under rectangular coordinate system, and the curve left-right asymmetry.
2) the Faradic electricity magnetic induction interference vector of judgement and removal magnetoelectric loop wire.Under complex plane coordinate (being polar coordinates), observe interference vector (being the vector of hysteresis loop misalignment initial point).Find the center of magnetoelectricity hysteresis loop, then this center is moved on to complex plane center (being equivalent to origin translation) and namely finish interference work, obtain removing the magnetoelectric loop wire of faraday's induced interference signal.At polar coordinates, the center of the magnetoelectric loop wire that obtains is at polar origin position (such as Fig. 3); Under rectangular coordinate system, the magnetoelectric loop wire that obtains is symmetrical (such as Fig. 4).
3) according to phase place magnetoelectric loop wire is overturn.Resulting magnetoelectric loop wire (Fig. 5 after the disposal route that proposes in the magnetoelectric loop wire test method of the disclosed a kind of continuously applying scanning magnetic field of Chinese patent CN101788653A and device thereof according to the applicant is carried out simple process, curve 1) can find out that its profile is rough, particularly the amplifier section loop line has obvious complications.Normal direction at the perpendicular axis of symmetry of complex plane magnetoelectricity 8 word loop lines is got a bit, as the upset phase place complex plane is divided into two parts [θ-180 °, θ] and [θ, θ+180 °] with this place angle θ (θ＞0).Phase place is set is positioned at [θ-180 °, θ] magnetoelectricity signal in the scope is being for just, phase place is set is positioned at [θ, θ+180 °] magnetoelectricity signal in the scope is for negative, positive and negative magnetoelectricity signal to be set as ordinate, D.C. magnetic field is horizontal ordinate, just obtains the magnetoelectric loop wire (Fig. 5, curve 2) of contour smoothing.Comparison curves 1,2 can be learnt, the magnetoelectric loop wire contour smoothing that process this method obtains, and the apparent error of amplifier section loop line complications also obtains fine solution.
Claims (3)
1. the drawing method of a magnetoelectric material magnetoelectric loop wire is characterized in that may further comprise the steps:
A series of alternating magnetoelectric signals that comprise amplitude and phase place that record under D.C. magnetic field that 1) will be kept in the text are mapped with polar coordinates and rectangular coordinate mode, and the polar coordinates plane also can be described as the signal complex plane; The described concrete grammar of being figure with polar coordinates is: under polar coordinates, a pair of data under each magnetic field, comprise voltage signal amplitude R and phase theta, a point (R in the corresponding polar coordinates, θ), according to the Measuring Time order, the point that each phase place under different magnetic field and amplitude is corresponding links to each other, and obtains the magnetoelectric loop wire under the original undressed polar coordinate system;
2) faraday who judges lead-in wire responds to the interference vector of generation and the magnetoelectricity signal that records under each D.C. magnetic field is deducted the magnetoelectricity signal after obtaining correcting;
3) will deduct interference vector magnetoelectricity signal afterwards maps at complex plane again, the perpendicular axis of symmetry of magnetoelectricity 8 word loop lines take up an official post get any arrange the upset phase place size, according to the upset phase place, setting is positioned at the above magnetoelectricity signal of upset phase place for just, the following magnetoelectricity signal of upset phase place is set for negative, positive and negative magnetoelectricity signal to be set as ordinate, D.C. magnetic field is horizontal ordinate, and mapping obtains magnetoelectric loop wire.
2. the drawing method of a kind of magnetoelectric material magnetoelectric loop wire as claimed in claim 1 is characterized in that in step 1), and described alternating magnetoelectric signal comprises the magnetoelectric loop wire data of time, magnetic field, amplitude and phase data.
3. the drawing method of a kind of magnetoelectric material magnetoelectric loop wire as claimed in claim 1, it is characterized in that in step 1), the concrete grammar that described rectangular coordinate mode is mapped is: under rectangular coordinate system, each is to data, comprise amplitude and magnetic field, a point in the corresponding rectangular coordinate system links to each other all points according to the Measuring Time order, obtains the magnetoelectric loop wire under the original undressed rectangular coordinate system.
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| CN 201110421012 CN102520380B (en) | 2011-12-15 | 2011-12-15 | Mapping method of magnetoelectric loop wire of magnetoelectric material |
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| SU836608A1 (en) * | 1979-07-25 | 1981-06-07 | Отдел Физики Неразрушающего Контроляан Белорусской Ccp | Automatic magnetizing device |
| US5028869A (en) * | 1988-04-23 | 1991-07-02 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forshung E.V. | Process and apparatus for the nondestructive measuring of magnetic properties of a test body, by detecting a tangential magnetic field and deriving harmonic components thereof |
| CN1963556A (en) * | 2006-11-24 | 2007-05-16 | 中国计量科学研究院 | Apparatus for integrality checking proportion of cryo-current comparator and the method thereof |
| CN101509961A (en) * | 2009-03-23 | 2009-08-19 | 哈尔滨工业大学 | Bar permanent magnet section magnetic-flux measurement apparatus and measurement method thereof |
| CN101520495A (en) * | 2009-03-02 | 2009-09-02 | 重庆大学 | Device for mapping magnetizing characteristic curve of ferromagnetic materials and mapping method thereof |
| CN101788653A (en) * | 2010-02-11 | 2010-07-28 | 厦门大学 | Magnetoelectric loop wire test method for continuously applying scanning magnetic field and device thereof |
| CN201917648U (en) * | 2010-05-13 | 2011-08-03 | 中南民族大学 | High pulse magnetic field measuring device through electromagnetic induction method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62187268A (en) * | 1986-02-13 | 1987-08-15 | Sony Corp | Circuit for high sensitive b-h loop tracer |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU836608A1 (en) * | 1979-07-25 | 1981-06-07 | Отдел Физики Неразрушающего Контроляан Белорусской Ccp | Automatic magnetizing device |
| US5028869A (en) * | 1988-04-23 | 1991-07-02 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forshung E.V. | Process and apparatus for the nondestructive measuring of magnetic properties of a test body, by detecting a tangential magnetic field and deriving harmonic components thereof |
| CN1963556A (en) * | 2006-11-24 | 2007-05-16 | 中国计量科学研究院 | Apparatus for integrality checking proportion of cryo-current comparator and the method thereof |
| CN101520495A (en) * | 2009-03-02 | 2009-09-02 | 重庆大学 | Device for mapping magnetizing characteristic curve of ferromagnetic materials and mapping method thereof |
| CN101509961A (en) * | 2009-03-23 | 2009-08-19 | 哈尔滨工业大学 | Bar permanent magnet section magnetic-flux measurement apparatus and measurement method thereof |
| CN101788653A (en) * | 2010-02-11 | 2010-07-28 | 厦门大学 | Magnetoelectric loop wire test method for continuously applying scanning magnetic field and device thereof |
| CN201917648U (en) * | 2010-05-13 | 2011-08-03 | 中南民族大学 | High pulse magnetic field measuring device through electromagnetic induction method |
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| JP昭62-187268A 1987.08.15 |
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Address after: 363000 the southern tip of Xiamen University Zhangzhou campus, Zhangzhou, Fujian Patentee after: XIAMEN University Address before: Xiamen City, Fujian Province, 361005 South Siming Road No. 422 Patentee before: XIAMEN University |