Another posts

lines of reasoning gental wind meso etymology undoubtful definition thrum cap skin and bones meaning power loom definition cheiloplasty definition definition of north star polyplacophora definition amphiprotic examples definition of sod house angulated definition federal republic of germany definition unfilial meaning unuseful definition glinting eyes sand sucker malarious definition hatting definition define falstaffian merozoite definition full swing meaning actinic rays definition of semi barbaric horny hands alas usage petiolate leaves civil rights leaders definition passer genus tumble up what is a winebibber

magnetometer

Definitions

  • WordNet 3.6
    • n magnetometer a meter to compare strengths of magnetic fields
    • ***
Webster's Revised Unabridged Dictionary
    • n Magnetometer (Physics) An instrument for measuring the intensity of magnetic forces; also, less frequently, an instrument for determining any of the terrestrial magnetic elements, as the dip and declination.
    • ***
Century Dictionary and Cyclopedia
    • n magnetometer An instrument used to measure magnetic forces or the strength of a magnetic field, especially one used to measure the intensity of the earth's magnetic force at any place. Magnetometers are arranged to measure the horizontal and vertical components of this force, from which its total intensity and direction are calculated.
    • ***

Etymology

Webster's Revised Unabridged Dictionary
Magneto-, + -meter,: cf. F. magnétomètre,

Usage

In literature:

One of the losses was a heavy case which formed the packing of part of the magnetometer.
"The Home of the Blizzard" by Douglas Mawson
The magnetisation, or the molecular effect, is measured by the deflection of the magnetometer.
"Response in the Living and Non-Living" by Jagadis Chunder Bose
I'll need a magnetometer to trail, too.
"Talents, Incorporated" by William Fitzgerald Jenkins
But another method of detecting the position of a metallic mass is by the use of the magnetometer.
"The Journal of Submarine Commander von Forstner" by Georg-Günther von Forstner
Or the magnetometer we use to keep a check on Earth's magnetic field.
"Where I Wasn't Going" by Walt Richmond
***

In news:

To enable next-generation sensing applications, the sensor industry is moving toward a goal of measuring 10 axes: a three axis accelerometer, three axis gyroscope, three axis magnetometer, and a pressure sensor.
***

In science:

Also visible, and specially relevant here, are the four tri-axial magnetometers, which are represented as floating boxes.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
This is the ultimate goal of the tri-axial fluxgate magnetometers .
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
Additionally, the number of magnetometer channels does not provide sufficient data to go beyond a poor linear approximation .
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
Adequate processing of all the available information shows that the magnetic field is smaller towards the center of the spacecraft (where the test masses are located) than it is in its periphery (where the magnetometers take measurements).
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
Once the readings of the magnetometers are known, the theoretical solution for the magnetic field within the entire volume of the LCA is determined in a straightforward way.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
As can be seen, the number of inputs is twelve — one for each magnetometer readout — corresponding to the four tri-axial magnetometers placed in the spacecraft.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
The readings of the magnetometers are the system inputs (4 magnetometers, each one with 3 data channels).
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
It is worth noting at this point that similar results could be obtained using a high-dimensionality least squares analysis, but in our specific case we have found matrix inversion problems because some magnetometer channels present highly correlated signals.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
The answer to this question is that during the training process, the neural network eventually learns that the magnetic field at the positions of the test masses is generally smaller than the magnetometers readouts — with occasional exceptions due to the rich and complex profile structure of the field inside the LCA.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
To better understand this, we found instructive to look into relationships between the data read by the magnetometers and the estimates of the magnetic field generated by the neural network.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
For example, the interpolation of the Bx -component in test mass 1 is mostly dependent on the Bx -readings of the magnetometers.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
Secondly, the measurements of the magnetometers closer to the interpolation points have larger weights.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
For instance, when the field is estimated at the position of TM1, to which the magnetometer M4 is the closest magnetometer, the value it measures is the largest contributor to the interpolated field in TM1 .
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
At the same time, magnetometers M1 and M3 being nearly equidistant from both test masses, their weights are almost identical (see table 1 for more details).
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
Finally, no apparent or easily deductible physical relationship is found between the estimated gradient at the positions of the test masses and the magnetometer inputs.
Neural network interpolation of the magnetic field for the LISA Pathfinder Diagnostics Subsystem
***