Transcript Baltag Octavian Ioan - terrafluxcontrol.ro

MAGNETOMETRY
Theoretical and
experimental research
Baltag Octavian Ioan
Ligns of force of the geomagnetic field (Glatzmaier et Roberts, 1995).
http://paleomag.uqar.ca/spip.php?article44
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THEORETICAL AND APPLICATIVE
RESARCH IN MAGNETOMETRY
DIRECTIONS 1971 - 2001
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MAGNETOMETRY
Space applications
Marine applications and naval
degaussing
Terrestrial – special applications
Laboratory – research & industry
METROLOGY,
TRANSDUCERS & SPECIAL
DEVICES
MAGNETIC DETECTION
 Magnetic naval and
terrestrial mines
 Industrial applications buried metallic bodies
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ELECTROMAGNETIC
COMPATIBILITY
Special applications
Research & industry
PROTECTION OF INTELECTUAL & INDUSTRIAL PROPERTY
 Patents
 Trademarks
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RESEARCH DOMAIN 2001 - 2008
HIGH RESOLUTION MAGNETOMETRY
 Biomedical applications
MICROWAVE RADIOMETRY
 Microwave Thermografy – early detection of the
breast cancer
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MAGNETOMETRY – NAVAL & MARINE APPLICATIONS
Magnetic protection of ships
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MAGNETOMETRY – NAVAL & MARINE APPLICATIONS
Methods and installations for magnetic protection of ships
Triaxial magnetometer for SAD installations
control of
Cercetari in vederea realizarii unui
magnetometru triaxial pentru comanda
instalatiilor SAD pentru navele dragoare de mine
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MAGNETOMETRY – NAVAL & MARINE APPLICATIONS
Degaussing ship
http://www.defencetalk.com/pictures/surface-ships/p11192-rsrb-36degaussing-ship.html
Romanian degaussing ships: “AUTOMATICA” & “”
Degaussing current
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MAGNETOMETRY – NAVAL & MARINE APPLICATIONS
Dragging of the degaussing cable
around of ship
www.aetherometry.com/.../uft_degaussing.html
http://www.fas.org/man/dod-101/navy/docs/swos/eng/62B-303.html
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Three channel magnetometer
Aplications: measuring of the
vertical magnetic field
• power: 220V/50Hz, 12V
dc.
• 3 channels galvanic
separately
• range: 80.000 nT
• manual compensation:
60.000 nT
• display: 3 1/2 digit
• maximum immersion
depth: 40m,
Old URSS naval fluxgate
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MAGNETOMETRY - NAVAL & MARINE APPLICATIONS
Counter – magnetic mine technology:
Triaxial magnetometer for “SAD” systems protection
of mine sweeper
Characteristics and performance:
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Magnetometric channel: 3 orthogonal
fluxgates and 3 magnetometric channels
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Fluxgates position: masthead
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Measuring range: +/- 60.000 nT
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Compensation range : +/- 50.000 nT
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Coils intensity current: +/- 5 A
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Amplidyne power: 1-7 kVA
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Measuring error: 1%
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Nonlinearity: < 1%
Degaussing coil: counteract the ship’s longitudinal permanent and induced magnetism
- athwart ship coil - loops in vertical fore and aft planes for compensate the permanent
and induced magnetism
- longitudinal coil - loops in vertical planes, counteract the ship’s longitudinal magnetism
- quarterdeck coil
- forecastle coil counteract the ship’s longitudinal magnetism
- main coil made in a horizontal plane, encircles the ship and
counteract the ship’s vertical magnetism
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Laboratory of the "Mircea cel Batran" Naval Academy
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Romanian SAD
“Antimagnetic protection ” System
Old
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Amplidynes current amplifiers for deperming coils
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MAGNETOMETRY - NAVAL & MARINE APPLICATIONS
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Research regarding a omnidirectional
magneto static transducer
Destination: Naval mine with
multiparametric sensors
Magnetometric channel:
• gradient channels: 3 orthogonal
• magnetic field range: +/- 50.000 nT
• sensibility on magnetic field: 0,1 mV / nT
• sensibility on magnetic field gradient: 1 mV/ nT
• magnetic field detection range: +/- 10.000 nT
• gradient base: 2m
• gradient magnetic field range: +/- 5.000 nT/m
• duration of magnetic gradient pulse: 1s – 10s
• astatic performance: 10-3
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MAGNETOMETRY - NAVAL & MARINE APPLICATIONS
Marine polygon: magnetic signature
Naval magnetometry polygon
Multichannel magnetometer
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Multichannel magnetometric installation
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measuring range: +/-20.000 nT
+/- 2.000 nT
field compensation: +/- 60.000 nT
error compensation: 5 nT
resolution: 1 nT
measurement error: 2%
channel: 24
fluxgate cable length: 200 m
calibrations testing
galvanic separation between channels
analogic output:+/-5 V/50.000 nT/10 kΩ
temperature coefficient: 4 nT / °C
Magnetometer channel –
hybrid integrated circuits
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Computerized sub aquatic magnetic polygon
128 magnetometric channels
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Computerized sub aquatic magnetic polygon
• 128 magnetometric channels
• measuring range: +/- 80.000 nT
• analogical output: 8V / 80.000nT
• galvanic separation
• length of the cable: 1.200 m
• magnetic field compensation: 16 step
• magnetic field step: 5.000nT
• A/D conversion: 16 bit
• calibration step: 10.000 nT
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Computerized sub aquatic magnetic polygon
Magnetometer case
Magnetometers
arrangements
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Magnetic Detecţia de anomalii magnetice în mediul
marin – Marea Neagra - produsul “SMM III”
detecţia unor variaţii a câmpului magnetic mai mici de 1 nT
 acurateţe absolută a măsurării mai bună de 0,2 nT
 să lucreze în condiţii de temperatură de la – 40 C la + 60 C
 un număr de măsurări pe secundă mai mare de 3
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Unitate dispusă în aeronavă
Corp aerodinamic
tractat
Magnetometru cu
efect Overhauser
Cablu special
de semnal şi
tracţiune
(70m)
Troliu
electric
pentru
lansarea
şi
recuperar
ea
corpului
tractat
Unitate
a de
calcul şi
afişare
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Overhauser magnetometer
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Caracteristici:
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domeniu: 28.000 – 75.000 nT;
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zgomot: 0,03 nT/Hz;
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precizie: 0.5 nT;
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ieşire digitală cu rata de 10 Hz;
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senzor omnidirecţional.
 Corpul tractat este realizat din
materiale amagnetice compozite, fiind
acoperit cu materiale de amortizare a
şocurilor. Acesta este conectat cu
cablul de tracţiune printr-o montură
specială.
 Corpul este tractat în mediu cu viteză
de până la 10 Nd la distanţa maximă
de 300 m. Adâncimea de lucru
maximă este de 300 m.
 Aceste echipamente sunt prevăzute
cu mijloace de poziţionare de tip GPS
de mare precizie pentru o localizare
corectă şi eficientă a obiectelor
căutate.
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CERCETARI DE DETECTIE MAGNETICA
Cercetari privind detectia subacvatica a unor corpuri metalice
aflate pe fundul marii
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O.Baltag, D. Costandache, Electromagnetic detection of the metallic
hidden objects, International conference on “The detection of abandoned
lands mines”, Edinburg, 1996
O. Baltag, D. Costandache, Detectia electromagnetica a corpurilor
metalice, Conferinta Nationala de Fizica Aplicata, Iasi 2004
Electromagnetic detection of metallic objects, O. Baltag, D.Costandache,
Bul. Inst Pol. Iasi, tom LII (LVI), fasc. 1-2, 2006, pp.
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Aici incepe inovarea . . . . .
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