FLUXGATE magnetometer - how it works

In summary: This can be observed by feeding an ideal sine wave into the primary winding and measuring the output on an oscilloscope. The amount of shift in the output signal will depend on the strength of the magnetic field.
  • #1
tarakan
53
2
Assuming that I am looking at an 'ideal' fluxgate magnetometer.


I am feeding this transformer an ideal sine wave. The secondary winding output and the primary winding input are fed into two channels of an oscilloscope.

A magnetic field from the outside (like Earth magnetic field) is applied.

Would I get a shift of the output signal in relationship to the input signal by X or by Y axis?

http://www.google.com/imgres?um=1&newwindow=1&safe=off&hl=en&authuser=0&biw=1280&bih=711&tbm=isch&tbnid=MnAQmLhnObWiOM:&imgrefurl=http://www.sciencetronics.com/greenphotons/%3Fp%3D752&docid=5Ig245WYo7XlRM&imgurl=http://www.sciencetronics.com/greenphotons/wp-content/uploads/2011/11/IGP5393_900p_50XE_900p_50XE.jpg&w=327&h=260&ei=dtiiUY-2GfPC4APV_4HQCQ&zoom=1&ved=1t:3588,r:0,s:0,i:80&iact=rc&dur=3054&page=1&tbnh=158&tbnw=199&start=0&ndsp=19&tx=82&ty=85

VS

http://www.google.com/imgres?um=1&newwindow=1&safe=off&hl=en&authuser=0&biw=1280&bih=711&tbm=isch&tbnid=8sWadv5nEPCHJM:&imgrefurl=http://www.sciencedirect.com/science/article/pii/S0924424705007181&docid=svaQywi7ykfhwM&imgurl=http://ars.els-cdn.com/content/image/1-s2.0-S0924424705007181-gr2.jpg&w=316&h=231&ei=dtiiUY-2GfPC4APV_4HQCQ&zoom=1&ved=1t:3588,r:11,s:0,i:113&iact=rc&dur=649&page=1&tbnh=173&tbnw=237&start=0&ndsp=19&tx=124&ty=86
or
https://www.youtube.com/watch?v=https://www.youtube.com/watch?feature=player_detailpage&v=zdr_Og0PeRk#t=20s

Would this depend on the angle of the magnetic flux in relationship to the transformer?
Would this be different for a bar transformer vs a ring transformer.

Thank you.
 
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  • #2
Yes, the output signal will shift in relation to the input signal, depending on the angle of the magnetic field and the type of transformer you are using. For a bar transformer, the output signal will shift in the direction of the flux, while for a ring transformer, the output signal will shift perpendicular to the flux.
 

FAQ: FLUXGATE magnetometer - how it works

What is a FLUXGATE magnetometer and how does it work?

A FLUXGATE magnetometer is a device used to measure the strength and direction of a magnetic field. It works by using a small coil of wire surrounded by a magnetic core. When a magnetic field is present, the core becomes magnetized, causing the coil to produce an electric current. This current is then amplified and measured, providing information about the magnetic field.

What are the applications of FLUXGATE magnetometers?

FLUXGATE magnetometers have a wide range of applications, including geophysical surveys, navigation systems, and aerospace technology. They are also commonly used in scientific research to study the Earth's magnetic field and in the search for magnetic materials.

How accurate are FLUXGATE magnetometers?

The accuracy of a FLUXGATE magnetometer depends on several factors, such as the quality of the instrument and the strength of the magnetic field being measured. However, they are generally considered to be highly accurate, with some models capable of measuring magnetic fields with a resolution of nanoteslas (10^-9 tesla).

What are the advantages of using a FLUXGATE magnetometer?

One of the main advantages of FLUXGATE magnetometers is their high sensitivity and accuracy. They are also relatively small and lightweight, making them portable and easy to use in the field. They are also able to measure both the strength and direction of a magnetic field, providing a more complete picture of the field being measured.

Are there any limitations to FLUXGATE magnetometers?

While FLUXGATE magnetometers are highly accurate and sensitive, they do have some limitations. They are susceptible to interference from external magnetic fields, which can affect their readings. They also have a limited dynamic range, meaning they can only measure magnetic fields within a certain range of strengths. Additionally, they require regular calibration to maintain their accuracy.

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