11

MAGNETOMETRYTheoretical and

experimental research

Baltag Octavian IoanBaltag Octavian Ioan

Ligns of force of the geomagnetic field (Glatzmaier et Roberts, 1995). http://paleomag.uqar.ca/spip.php?article44

22

THEORETICAL AND APPLICATIVE THEORETICAL AND APPLICATIVE RESARCH IN MAGNETOMETRY RESARCH IN MAGNETOMETRY

DIRECTIONS 1971 - 2001DIRECTIONS 1971 - 2001

MAGNETOMETRYMAGNETOMETRY Space applicationsSpace applications Marine applications and naval Marine applications and naval

degaussing degaussing Terrestrial – special applicationsTerrestrial – special applications Laboratory – research & industryLaboratory – research & industry

MAGNETIC DETECTIONMAGNETIC DETECTION Magnetic naval and Magnetic naval and

terrestrial mines terrestrial mines Industrial applications -Industrial applications -

buried metallic bodiesburied metallic bodies

METROLOGMETROLOGYY,,

TRANSDUCERS & SPECIAL TRANSDUCERS & SPECIAL DEVICESDEVICES

PROTECTION OF INTELECTUAL & INDUSTRIAL PROPERTYPROTECTION OF INTELECTUAL & INDUSTRIAL PROPERTY Patents Patents TrademarksTrademarks

ELECTROMAGNETIC ELECTROMAGNETIC COMPATIBILITYCOMPATIBILITY

Special applicationsSpecial applications Research & industryResearch & industry

33

HIGH RESOLUTION MAGNETOMETRYHIGH RESOLUTION MAGNETOMETRY BBiomedical iomedical applicationsapplications

MICROWAVE MICROWAVE RADIOMETRRADIOMETRYY Microwave Microwave TThhermografermografy y – – early early detectidetection of the on of the

breast cancerbreast cancer

RESEARCH DOMAIN 2001 - 2008RESEARCH DOMAIN 2001 - 2008

44

MAGNETOMETRY – NAVAL & MARINE APPLICATIONSMAGNETOMETRY – NAVAL & MARINE APPLICATIONS Magnetic protection of shipsMagnetic protection of ships

55

MAGNETOMETRY – NAVAL & MARINE APPLICATIONSMAGNETOMETRY – NAVAL & MARINE APPLICATIONS Methods and installations for magnetic protection of ships Methods and installations for magnetic protection of ships

Triaxial magnetometer for SAD installations Triaxial magnetometer for SAD installations control of control of Cercetari in vederea realizarii unui Cercetari in vederea realizarii unui magnetometru triaxial pentru comanda magnetometru triaxial pentru comanda instalatiilor SAD pentru navele dragoare de mineinstalatiilor SAD pentru navele dragoare de mine

66

Degaussing current

MAGNETOMETRY – NAVAL & MARINE APPLICATIONSMAGNETOMETRY – NAVAL & MARINE APPLICATIONS

Romanian degaussing ships: “AUTOMATICA” & “”

http://www.defencetalk.com/pictures/surface-ships/p11192-rsrb-36-degaussing-ship.html

Degaussing ship

77

Dragging of the degaussing cable around of ship

MAGNETOMETRY – NAVAL & MARINE APPLICATIONSMAGNETOMETRY – NAVAL & MARINE APPLICATIONS

www.aetherometry.com/.../uft_degaussing.html

http://www.fas.org/man/dod-101/navy/docs/swos/eng/62B-303.html

88

Three channel magnetometerThree channel magnetometer

Old URSS naval fluxgate

Aplications: Aplications: measuring of the measuring of the vertical magnetic fieldvertical magnetic field

• power: 220V/50Hz, 12V power: 220V/50Hz, 12V dc. dc. • 3 channels galvanic 3 channels galvanic separatelyseparately• range:range: 80.000 nT 80.000 nT• manual compensation: manual compensation: 60.000 nT60.000 nT• display: 3 1/2 digitdisplay: 3 1/2 digit• maximum immersion maximum immersion depth: 40m,depth: 40m,

99

Counter – magnetic mine technology:Counter – magnetic mine technology:Triaxial magnetometer for “Triaxial magnetometer for “SADSAD” systems protection ” systems protection of mine sweeperof mine sweeper

Characteristics and performance:Characteristics and performance: Magnetometric channel: 3 orthogonal Magnetometric channel: 3 orthogonal

fluxgates and 3 magnetometric channelsfluxgates and 3 magnetometric channels Fluxgates position: mastheadFluxgates position: masthead Measuring range: +/- 60.000 nTMeasuring range: +/- 60.000 nT Compensation range : +/- 50.000 nTCompensation range : +/- 50.000 nT Coils intensity current: +/- 5 ACoils intensity current: +/- 5 A Amplidyne power: 1-7 kVAAmplidyne power: 1-7 kVA Measuring error: 1%Measuring error: 1% Nonlinearity: < 1%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

MAGNETOMETRY - NAVAL & MARINE APPLICATIONSMAGNETOMETRY - NAVAL & MARINE APPLICATIONS

1010Laboratory of the "Mircea cel Batran" Naval Academy

1111Romanian SAD

“Antimagnetic protection ” System

Old

1212

Amplidynes current amplifiers for deperming coils

1313

Research regarding a omnidirectional Research regarding a omnidirectional magneto static transducer magneto static transducer

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

Destination: Naval mine with multiparametric sensors

MAGNETOMETRY - NAVAL & MARINE APPLICATIONSMAGNETOMETRY - NAVAL & MARINE APPLICATIONS

1414

Marine polygon: magnetic signature Marine polygon: magnetic signature

MAGNETOMETRY - NAVAL & MARINE APPLICATIONSMAGNETOMETRY - NAVAL & MARINE APPLICATIONS

Naval magnetometry polygon

Multichannel magnetometer

1515

Multichannel magnetometric installationMultichannel magnetometric installation

measuring rangemeasuring range: +/-20.000 n: +/-20.000 nT T +/-+/- 2.000 nT2.000 nT field compensationfield compensation: +/- 60.000 nT: +/- 60.000 nT error compensationerror compensation: 5 nT: 5 nT resolutionresolution: 1 nT: 1 nT measurement emeasurement errrorror: 2%: 2% channelchannel: 24: 24 fluxgate cable length: 200 mfluxgate cable length: 200 m calibrations testing calibrations testing galvanic separation between channelsgalvanic separation between channels analogic output:+/-5 V/50.000 nT/10 kanalogic output:+/-5 V/50.000 nT/10 kΩΩ temperature coefficient: 4 nT / °Ctemperature coefficient: 4 nT / °C

Magnetometer channel – hybrid integrated circuits

1616

Computerized sub aquatic magnetic polygonComputerized sub aquatic magnetic polygon

128 magnetometric128 magnetometric channelschannels

1717

Computerized sub aquatic magnetic polygonComputerized 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

1818

Computerized sub aquatic magnetic polygonComputerized sub aquatic magnetic polygon

Magnetometers arrangements

Magnetometer case

1919

Magnetic DMagnetic Detecţia de anomalii magnetice în mediuletecţia de anomalii magnetice în mediul marin marin – Marea Neagra - – Marea Neagra - produsul produsul ““SMM IIISMM III””

detecţia unor variaţii a câmpului magnetic mai mici de 1 nTdetecţia unor variaţii a câmpului magnetic mai mici de 1 nT acurateţe absolută a măsurării mai bună de 0,2 nTacurateţe absolută a măsurării mai bună de 0,2 nT să lucreze în condiţii de temperatură de la –să lucreze în condiţii de temperatură de la – 4040 C la +C la + 60 C60 C un număr de măsurări pe secundă mai mare de 3un număr de măsurări pe secundă mai mare de 3

Corp aerodinamic tractat

Magnetometru cu efect Overhauser

Unitate dispusă în aeronavă

Troliu electric pentru

lansarea şi

recuperarea

corpuluitractat

Unitatea de

calcul şi

afişare

Cablu specialde semnal şi

tracţiune(70m)

2020

2121

Overhauser magnetometer Overhauser magnetometer CCaracteristici:aracteristici:

domeniudomeniu: 28: 28..000 – 75000 – 75..000 nT;000 nT; zgomot: 0zgomot: 0,,03 nT/Hz;03 nT/Hz; precizie: 0.5 nT;precizie: 0.5 nT; ieşire digitală cu rata de 10 Hz;ieşire digitală cu rata de 10 Hz; senzor omnidirecţional.senzor omnidirecţional.

Corpul tractat este realizat din Corpul tractat este realizat din materiale amagnetice compozite, fiind materiale amagnetice compozite, fiind acoperit cu materiale de amortizare a acoperit cu materiale de amortizare a şocurilor. Acesta este conectat cu şocurilor. Acesta este conectat cu cablul de tracţiune printr-o montură cablul de tracţiune printr-o montură specială.specială.

Corpul este tractat în mediu cu viteză Corpul este tractat în mediu cu viteză de până la 10 Nd la distanţa maximă de până la 10 Nd la distanţa maximă de 300 m. Adâncimea de lucru de 300 m. Adâncimea de lucru maximă este de 300 m. maximă este de 300 m.

Aceste echipamente sunt prevăzute Aceste echipamente sunt prevăzute cu mijloace de poziţionare de tip GPS cu mijloace de poziţionare de tip GPS de mare precizie pentru o localizare de mare precizie pentru o localizare corectă şi eficientă a obiectelor corectă şi eficientă a obiectelor căutate.căutate.

2222

O.Baltag, D. Costandache, Electromagnetic detection of the metallic O.Baltag, D. Costandache, Electromagnetic detection of the metallic hidden objects, International conference on “The detection of abandoned hidden objects, International conference on “The detection of abandoned lands mines”, Edinburg, 1996lands mines”, Edinburg, 1996

O. Baltag, D. Costandache, Detectia electromagnetica a corpurilor O. Baltag, D. Costandache, Detectia electromagnetica a corpurilor metalice, Conferinta Nationala de Fizica Aplicata, Iasi 2004metalice, Conferinta Nationala de Fizica Aplicata, Iasi 2004

Electromagnetic detection of metallic objects, Electromagnetic detection of metallic objects, O. Baltag,O. Baltag, D.Costandache, D.Costandache, Bul. Inst Pol. Iasi, tom LII (LVI), fasc. 1-2, 2006, pp.Bul. Inst Pol. Iasi, tom LII (LVI), fasc. 1-2, 2006, pp.

CERCETARI DE DETECTIE MAGNETICA CERCETARI DE DETECTIE MAGNETICA Cercetari privind dCercetari privind detectetectiaia subacvatic subacvaticaa a unora unor corpuri metalice corpuri metalice

aflate pe fundul mariiaflate pe fundul marii

2323

Aici incepe inovarea . . . . . . . . . .