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Automatic test technology research YIG probe - based high-precision wide temperature magnetic field

Author: LanJiangHe
Tutor: LiuYingLi；ChenJinSong
School: University of Electronic Science and Technology
Course: Software Engineering
Keywords: Magnetic field sensor YIG Wide Temperature
CLC: TP274
Type: Master's thesis
Year: 2011
Downloads: 3
Quote: 0
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Abstract


YIG ( yttrium iron garnet ) A highly linear microwave resonance frequency bias magnetic field of polycrystalline materials properties of the new ideas of the magnetic field measurements , that is achieved by measuring the resonant frequency of the harmonic oscillator YIG polycrystalline various magnetic field of high-precision tests . According to the polycrystalline YIG small , ball ferromagnetic resonance principle , through the analysis and comparison of the resonant circuit of YIG single crystal harmonic oscillators and YIG polycrystalline Oscillator bandpass , bandstop , YIG polycrystalline ball with isotropic , easy processing , easy to produce , the resonant frequency stability characteristics . Bandstop resonant circuit is conducive to the size of the probe compression and ease of production advantages , and therefore determine the YIG polycrystalline ball for the harmonic oscillator with the resistance of the resonant circuit test probe . In YIG polycrystalline resonant harmonic oscillator based on using a single-stage YIG band-reject harmonic oscillator as the innovative structure of the magnetic field sensor , the use of the YIG small spherical harmonic high precision measurement test . YIG polycrystalline ball the precision wide temperature magnetic fields of the harmonic oscillator test sensor is produced , and by means of a vector network analyzer , digital multimeter , electronically controlled translation stage , mature and stable temperature sensor equipment , software control and magnetic field sensor the wide temperature calibration and data correction to achieve the automation of the magnetic field , the three-dimensional high-precision , transient test , and wide temperature test . The measuring range of the test system 600Gs ~ 3000Gs, temperature range from -55 ℃ to 125 ° C , accuracy of 0.1% , to meet the design requirements . The test system can be completed timely test , the temperature range of the electric vacuum with magnetic ring and magnetic systems and can be extended to the test on a variety of different shapes of magnetic materials and magnetic systems .

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