What is the purpose of magnetometer?

4 Magnetometer. A magnetometer is a scientific instrument used to measure the strength and direction of the magnetic field in the vicinity of the instrument.

How do you calibrate a magnetic sensor?

Open the Google Maps app, making sure that your blue circular device location icon is in view. Tap on the location icon to bring up more information about your location. At the bottom, tap the “Calibrate Compass” button. This will bring up the compass calibration screen.

What does a magnetometer detect?

Magnetometers are widely used for measuring the Earth’s magnetic field, in geophysical surveys, to detect magnetic anomalies of various types, and to determine the dipole moment of magnetic materials.

How does a magnetometer sensor work?

This magnetometer measures the resonance frequency of the protons in a magnetic field by using nuclear magnetic resonance (NMR). When a polarizing DC current is sent through a solenoid, it creates high magnetic flux around the hydrogen-rich fuel like kerosene and some of the protons get aligned with this flux.

Do you need to calibrate your magnetometer?

In order to compensate for these two problems and generate accurate magnetometer data, which is critical to getting high quality orientation results, you will need to calibrate your magnetometer in the final enclosure and setup in which the device will be used.

Why does my magnetometer have a pill shape?

For more accurate orientation output, the magnetometer needs to be adjusted to compensate for offset errors (meaning a shift in either direction on the X/Y/Z axis), as well as something called ‘soft iron error’, which causes what should be spherical output of the magnetometer to actually be an elongated ‘pill’ shape…

Which is the best calibration tool for Windows?

There are a variety of calibration tools out there, but MotionCal from always awesome PJRC (Teensy, etc.) is probably the easiest to use, and they provide pre-compiled binaries for all major operating systems.

How to download motion sensor calibration tool for OS?

Download the Motion Sensor Calibration tool for your OS from the following link and open it up on your system: http://www.pjrc.com/store/prop_shield.html By default, you should see something like this: Next open up the ahrs_calibration example from Adafruit_AHRS: