Magnetometer Definition and 20 Threads

Looking for any insight on a formula that can be used to calculate the load using a magnetometer sensor for synchronous motor

In descriptions of a VSM, the induced voltage in a coil is shown to be emf = -dPhi/dt = - (dPhi/dz)(dz/dt). From here, everyone seem to jump to a solution of emf = 2*Pi*A*f*m*sin(2*Pi*f*t). That makes some sense: in this case, you can define z = A*cos(2*Pi*f*t) so (dz/dt) =...

Hi Dear, I have a single-component (Z-Axis) magnetometer with 60nT resolution. I want to calculate the maximum distance that this magnetometer can detect an N52 magnet with a volume of 1 cm³. So I used the following formula and inserted the values, and finally calculated the Z...

Hi all, I have a question which I think should be a simple solve for most people but I cannot seem to get my head around it. It is a common case in geophysical surveying that a magnetic field vertical gradiometer might be used. This instrument uses two magnetometers separated by a known...

Hi, I have measured a sample and realized there is a frozen field that remained in the SQUID magnetometer before the MvsH measurements were taken. I am fairly new to using the SQUID, I have plotted the data and if I multiply the applied field by a factor of 0.75 the data matches what I...

Hello, Please I don't get how a Magnetometer property measurement system (MPMS) and a Superconductor quantum interference device (SQUİD) are working, can someone explain it ? Thank you very much

I am new to this site and I am not a physics / engineering professional. Please excuse me if I only have a layman's understanding. I have been trying to make a device to sense a 2 foot long by 2 inch diameter rod at an 8 foot distance (all steel, all ferrious). to be detected. I have tried home...

Hi all, I am learning about magnetometers. Esp. those based on the Overhauser effect (https://en.wikipedia.org/wiki/Nuclear_Overhauser_effect). As I understand, they embed a free radical fluid that contains free electrons that gets polarized through a RF field. Do you have any idea what free...

HI all, I'm starting by senior research and I am in the hunt of some data! Specifically magnetometer data from an Earth orbiting satellite, I could get the data I think from the http://ppi.pds.nasa.gov/ site but was curious if anyone had an insight or guidance. At my college we have a...

Hello, I am trying to get the induced emf reading from a sample in a vsm. A lock in amplifier is being used to read the signal. The problem is that the output voltage fluctuates heavily. Should I apply an audio amplified signal to my sample to make it vibrate ?

Hello, For my Master's Project, we are to choose an IMU module to stabilize a platform. You can think of a servo actuated turret, mounted on a Stewart Platform(which will generate the disturbances). The angular position error should be very low and there are both high and low frequency...

The only books I've been able to find are fairly old and are not written very clearly. Would someone be able to put it into A-level terms? I'm not worried about knowing any of the complicated mathematics behind it, only the conceptual side. Although if anyone fancies giving both then that would...

Hey, I have only a little experience with electronics, and I'm looking for a simple sensor for a magnetometer sensitive enough to detect about a gauss and accelerometer for detecting when something is picked up. As long as I can get a good explanation (data sheets can sometimes be cryptic) I'd...

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...

Dear all, We are in need of a vibrating sample magnetometer for our lab. but don´t have the money to buy a new one. We are considering - buy a secondhand one (still expensive) - buy the VSM head and adapt to a existing magnet. If you now where to find one, I would be happy to hear from...

1. Sample calculation - If a satellite carrying a magnetometer flies at 300km over a current that is flowing at 100km w/ a magnitude of 150 μA/m2 (over a cross-section of ~5 km2), how big a ΔB will be seen by the magnetometer? Assumptions (based on my understanding): -Satellite altitude...

Hi, I am currently trying to reconstruct three dimensional attitude only by using magnetometer measurements with the knowledge of initial attitude. There have been many research conducted on the attitude reconstruction only by magnetometer (or one vector) measurements. For example, this is a...

Hey I am interested in building a device that can give the local magnetic field in 3D. I'd like for the display to be digital not a mechanical gauge. I would not want to use any sensors or microcontrollers for that matter, but make it with gates and everything. If you do know how to make it...

Hello, Why is it that electron precession is not used in addition to proton precession in a proton precession magnetometer? It seems to me that when the frequencies are emitted as the protons precess that the electrons would do precessing at the same time and provide a secondary frequency to...

Magnetometer is used to compute the magentic moment of a magnet. In this procedure, we are asked to record the angles of deflection on both sides of the compass heads (that is North and South poles of the compass), since they are vertically opposite angles, they should read the same. Why are...