CN104765008A - Data processing method for improving effective line width measurement accuracy - Google Patents
Data processing method for improving effective line width measurement accuracy Download PDFInfo
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- CN104765008A CN104765008A CN201510226220.0A CN201510226220A CN104765008A CN 104765008 A CN104765008 A CN 104765008A CN 201510226220 A CN201510226220 A CN 201510226220A CN 104765008 A CN104765008 A CN 104765008A
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Abstract
The invention relates to the technical field of measurement and discloses a data processing method for improving effective line width measurement accuracy. The method comprises the steps that 101, a magnetic field is adjusted into a microwave cavity inner magnetic field A, and relevant physical quantity phi A1 is measured; 102, the magnetic field is adjusted into a microwave cavity inner magnetic field B, and relevant physical quantity phi B is measured; 103, the magnetic field is adjusted back to the magnetic field A, and the physical quantity phi A2 is measured; 104, the step 101 to step 103 are conducted repeatedly for N times, and the average value of the N times of measurement is calculated, wherein the measurement time from the step 101 to the step 103 are the same. The data processing method has the advantages that the problem that existing microwave magnetic materials are low in measurement accuracy can be solved, it is facilitated to improve the measurement accuracy, and the great practical value is achieved.
Description
Technical field
The present invention relates to field of measuring technique, particularly a kind of data processing method improving effective line width measuring accuracy.
Background technology
Than ferromagnetic resonance line width, effective line width unique distinction is the relation that can reflect physics broadening mechanism and static magnetic field, its measurement data often by as checking physical mechanism approach, as two magnon scattering effect.But the measuring study of effective line width is few in recent years, this is because microwave cavity measuring accuracy is difficult to realize, for small magnetic permeability and thin magnetic film, Measurement Resolution and precision are particularly important.Adopt international standards during microwave current Ferrite Material test effective line width IEC60556-2006, it is some single measurement frequently method during test, the measurement of effective line width is very high for the requirement of Measurement Resolution and precision, in time, floats, the systematic errors such as temperature drift all can cause larger measuring error, and single measurement can bring larger stochastic error.
Summary of the invention
In order to solve the problems of the prior art, the invention provides a kind of data processing method improving effective line width measuring accuracy, floating during in order to solve microwave magnetic property in prior art, the systematic errors such as temperature drift cause the problem of larger measuring error.
The present invention solves the technical scheme that prior art problem adopts: design a kind of data processing method improving effective line width measuring accuracy, comprise the following steps: microwave cavity internal magnetic field A is adjusted in (101) magnetic field, measures related physical quantity φ A1; (102) microwave cavity internal magnetic field B is adjusted in magnetic field, records related physical quantity φ B; (103) magnetic field adjusts back to A field, records physical quantity φ A2; (104) circulation step (101) to (103) N time and obtain N time measure mean value; In step (101) to (103), each time of measuring is identical.
As a further improvement on the present invention: magnetic field A and magnetic field B has identical time drift and floats with temperature.
As a further improvement on the present invention: the mean value measured in the A of magnetic field is equivalent to magnetic field A and magnetic field B measures at one time.
The invention has the beneficial effects as follows: this data processing method can solve the lower problem of existing microwave magnetic property measuring accuracy, be conducive to improving measuring accuracy, there is very strong practical value.
Accompanying drawing explanation
Fig. 1 is that the present invention measures substitution method schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Improve a data processing method for effective line width measuring accuracy, comprise the following steps: microwave cavity internal magnetic field A is adjusted in (101) magnetic field, measure related physical quantity φ A1; (102) microwave cavity internal magnetic field B is adjusted in magnetic field, records related physical quantity φ B; (103) magnetic field adjusts back to A field, records physical quantity φ A2; (104) circulation step (101) to (103) N time and obtain N time measure mean value; In step (101) to (103), each time of measuring is identical.
Magnetic field A and magnetic field B has identical time drift and floats with temperature.
The mean value measured in the A of magnetic field is equivalent to magnetic field A and magnetic field B measures at one time.
In one embodiment, as Fig. 1, a kind of data processing method improving effective line width measuring accuracy comprises the steps: 1, magnetic field is adjusted to A field, and measure related physical quantity φ, its value is φ A1.
2, magnetic field is adjusted to B field, measures to obtain φ B.
3, magnetic field is recalled to A field, measures to obtain φ A2.
4, each Measuring Time is identical, and time parameter is dt.Measuring mean value in A field is φ A=(φ A1+ φ A2)/2, be equivalent to and record at t=dt.This illustrates that A field and B field are equivalent to and measures at one time, therefore can eliminate temperature drift and time float.
5, the 1-4 that circulates walks, and circulation pendulous frequency is n time.
6, the mean value getting n time is net result.
The impact of the systematic error such as drift and temperature drift when this method can be eliminated prevailing, its superior repeatability allows again long measurement, and stochastic error is averaged by circulation measurement and reduces further, therefore can realize high duplication, high data reliability, pin-point accuracy.
In another embodiment, microwave cavity centre frequency is 10GHz, and sample is dish type yttrium ferrite, and diameter is 3mm, A field be 4500Gs, B field be 7000Gs, dt is 2 minutes, and cycle index is 25 times.
For this microwave cavity, the routine measurement uncertainty of resonance frequency is 50kHz, Q value is 25.After adopting this method, be improved as 0.14kHz and 3 respectively.The effective line width uncertainty of sample finds to be less than 0.15 Oe, and relative to measurement in the past, measuring accuracy improves an order of magnitude.It is worth mentioning that, after adopting metering substitution method, microwave cavity does not need to carry out precision temperature and stablizes, and the temperature variation of equivalence is less than 0.001 DEG C.
In one embodiment, a kind of microwave-tuned chamber that shakes comprises main cavity, slide block, coupling aperture and sample well, described main cavity and slide block form resonator cavity, described coupling aperture is positioned on described main cavity, sample well is positioned on slide block, described slide block coordinates with described main cavity, and its size and described main cavity 1 adapt; The material of described main cavity and slide block is for including but not limited to copper aluminum metal;
Described main cavity is electroplate with metal level; Described slide block is electroplate with metal level.Described slide block range of adjustment is 21.1 ~ 39.8mm, and the resonance frequency of its correspondence is 8 ~ 12GHz; Described main cavity 1 adopts the metal such as copper, aluminium, but does not get rid of other metal material, as aluminium, and silver etc.; Described main cavity 1 surface can cover the metals such as gold, silver by techniques such as plating, and to put forward high q-factor and to strengthen corrosion resistance, described main cavity 1 and slide block 2 form complete resonator cavity, and it works in TE011 pattern, but do not get rid of other pattern.
Adopt after this method, the data that effective line width actual computation uses are frequency changes with magnetic field, and need not direct frequency of utilization absolute value, and the stability in such chamber is no longer key issue.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. improve a data processing method for effective line width measuring accuracy, it is characterized in that: comprise the following steps: microwave cavity internal magnetic field A is adjusted in (101) magnetic field, measure related physical quantity φ A1; (102) microwave cavity internal magnetic field B is adjusted in magnetic field, records related physical quantity φ B; (103) magnetic field adjusts back to A field, records physical quantity φ A2; (104) circulation step (101) to (103) N time and obtain N time measure mean value; In step (101) to (103), each time of measuring is identical.
2. the data processing method of raising effective line width measuring accuracy according to claim 1, is characterized in that: magnetic field A and magnetic field B has identical time drift and floats with temperature.
3. the data processing method of raising effective line width measuring accuracy according to claim 1, is characterized in that: the mean value measured in the A of magnetic field is equivalent to magnetic field A and magnetic field B measures at one time.
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| CN103650237A (en) * | 2013-08-09 | 2014-03-19 | 华为技术有限公司 | Filter tuning device and filter |
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