Gauss Meter
Fluxgate Magnetometer
Superconducting Quantum Interferometer (SQUID)
Atomic Magnetometer
Proton Magnetometer
Optical Pump Magnetometer
Flux meter
Magnetoresistor
Magnetic resonance txoj kev
magneto-optical nyhuv
Tsom ntsoov rau thawj 6 hom (1-6) ntawm magnetometers, vim tias 6 hom magnetometers no tau siv ntau dua, thiab 4 yam kawg (7-10) tsuas yog qhia luv luv xwb.
1. Gaussmeter
1 Cov Ntsiab Cai ntawm Physics
Gaussmeter yog ib qho cuab yeej raws li lub hauv paus ntsiab lus ntawm Hall effect (raws li qhia hauv daim duab hauv qab no). Lub Hall sojntsuam ntawm Gauss meter generates ib tug voltage vim Hall nyhuv nyob rau hauv lub magnetic teb. Tom qab ntsuas qhov voltage, lub magnetic teb yuav tsum tau ntsuas.
2 Instrument parameters
Cov cuab yeej raug: feem ntau 0.05 feem pua -2 feem pua ntawm qhov ntau
(Cov Lus Ceeb Toom: Kev ntsuas qhov tseeb=tus nqi siab tshaj plaws ntawm qhov yuam kev / meter ntau × 100 feem pua)
Kev ntsuas ntau: feem ntau 1 G ~ 1 T magnitude
Nws yog qhov tsim nyog rau kev ntsuas cov hlau nplaum loj, xws li ntau pua Gauss lossis Tesla, thiab ntsuas cov hlau nplaum ruaj khov yog cov cuab yeej zoo heev; Txawm li cas los xij, nws tsis haum rau kev ntsuas qhov tsis muaj zog sib nqus, xws li ntsuas qhov geomagnetic teb, uas yog qhov tsis raug.
Meter bandwidth
Feem ntau 0Hz ~ ntau ntau KHz
3 Hall sojntsuam
Qhov loj ntawm qhov kev sojntsuam yog me me, txog 1 mus rau 2 hli, thiab qhov ntsuas magnetic teb yog tus nqi nruab nrab ntawm qhov loj no
Kev ntsuas qhov ntev Nws yog ib qho yooj yim rau kev sib koom ua ke nrog peb-dimensional Hall sojntsuam hauv qhov loj ntawm 1 txog 2 hli, yog li Gauss meter dav dav tuaj yeem ntsuas peb-dimensional magnetic teb, uas yog qhov zoo ntawm Gauss meter.
4 Cov cuab yeej siv
Siv los ntsuas qhov sib nqus ntawm cov hlau nplaum; tsim nyog rau kev ntsuas qhov sib nqus loj.
Hall Effect
Thaum lub magnetic teb yog perpendicular rau daim ntawv semiconductor, cov electrons yog deflected los ntawm lub Lorentz quab yuam, tsim kom muaj qhov sib txawv (hu ua Hall voltage) ntawm ob sab.
2. Fluxgate magnetometer
Qhov ntsuas ntsuas
Qhov kev daws teeb meem feem ntau yog nyob rau hauv qhov kev txiav txim ntawm 0.1nT, uas nyob deb dhau qhov ncav cuag ntawm Gauss meter!
Hauv cov txheej txheem ntsuas ntawm fluxgate magnetometer, qee qhov kev ntsuas zoo yog siv, thiab tom qab ntawd qhov kev sojntsuam rov qab los ntsuas ib zaug. Kev ua cov ntaub ntawv: ntxiv ob qhov txiaj ntsig thiab faib los ntawm 2. Lub hom phiaj yog txhawm rau tshem tawm qhov sib nqus teb offset.
Meter Accuracy 0.5 feem pua ntawm kev nyeem ntawv
Qhov ntsuas qhov ntsuas ntawm qhov ntsuas yog nyob rau hauv qhov kev txiav txim ntawm 0.1nT mus rau kaum tawm txhiab nT, npog qhov ntau ntawm geomagnetic teb. Tab sis nws tsis tuaj yeem ntsuas qhov muaj zog sib nqus zoo li cov hlau nplaum ruaj khov!
Instrument bandwidth DC 0Hz ~ 1KHz magnitude
Qhov seem hlau nplaum ntawm qhov kev sojntsuam yog nyob rau hauv qhov kev txiav txim ntawm 1nT. Thaum koj yuav qhov no, koj yuav tsum piav qhia meej rau cov neeg tsim khoom! Txwv tsis pub, qhov seem hlau nplaum ntawm qhov kev sojntsuam muab los ntawm cov chaw tsim khoom yog feem ntau kuj loj ~ 10nT, xws li Tuam Tshoj Metrology Institute.
Cov ntsiab lus yuav tsum tau them sai sai rau thaum yuav khoom: Piav nrog lub tuam txhab seb puas yuav ntsuas DC magnetic teb los yog AC magnetic teb. Kuv tau siv fluxgate magnetometer yuav los ntawm Tuam Tshoj Metrology Institute nrog tsuas yog ob peb Hz bandwidth. Yog tias koj xav ntsuas lub zog zaus sib nqus suab nrov, koj yuav tsum tau yuav lub siab bandwidth fluxgate magnetometer.
Tshwj xeeb, peb yuav tsum ntsuas lub hwj chim zaus magnetic teb suab nrov, thiab peb yuav tsum yuav lub high-bandwidth fluxgate magnetometer. Kuv tau pom ib pab neeg ua haujlwm pab pawg hauv tsev kawm ntawv kuaj xyuas kom pom lub suab nrov ntawm lub zog sib nqus, siv "Stefan Mayer Instruments" peb-dimensional fluxgate magnetometer, lub suab nrov tsawg dua 1pT / hauv paus Hz.
Kev sojntsuam loj
Qhov loj ntawm qhov kev sojntsuam yog nyob ntawm seb nws yog uniaxial lossis triaxial magnetic teb ntsuas. Uniaxial probes yog me dua li triaxial probes.
Peb-dimensional sojntsuam: feem ntau nyob rau hauv qhov kev txiav txim ntawm 2cm ~ 3cm, koj tuaj yeem xa mus rau Bartingdon (Bartingdon, qhov no yog lub npe zoo tshaj plaws hauv ntiaj teb, tab sis tus nqi kuj yog siab heev)
Uniaxial sojntsuam: feem ntau ntawm qhov kev txiav txim ntawm 1cm, lossis txawm me dua, qhov kuv tau siv yog 8 hli.
3 Cov Ntsiab Cai ntawm Physics
Txhawm rau kom nkag siab li cas fluxgate magnetometer ua haujlwm:
Ua ntej ntawm tag nrho cov, peb yuav tsum tau kom meej ib lo lus nug "dab tsi yog ib tug hysteresis voj"?
Thib ob, txheeb xyuas qhov nonlinearity ntawm hysteresis voj (tseem hu ua qhov sib nqus saturation tshwm sim, lossis cov nyhuv fluxgate, lossis cov nyhuv transformer);
Thaum kawg, lub hauv paus ntsiab lus ntawm fluxgate magnetometer yog txiav los ntawm Faraday txoj cai ntawm electromagnetic induction;
