Electromagnetic (EM) tracking is a form of motion capture that uses a source to generate a magnetic field and define the tracking area. The source acts as a transmitter. The field size is determined by the source size: the larger the source, the larger the tracking area.
EM tracking also requires sensors and a system electronic unit (SEU). The sensors detect what is tracked, and the SEU converts this into position and orientation data.
How does this compare to other tracking options?
EM tracking is unique—our technology provides 6DOF with no data drift. Our embeddable sensors do not require line of sight, so you can track through walls, clothes, and other objects, as long as you stay within the magnetic field.
Optical tracking is another popular option that people sometimes turn to, involving cameras to determine an object or person’s position and movement. The difference here is that, due to the camera requirement, there is often a need for a clear line of sight. These trackers will typically operate on 3DOF and can be sensitive to environmental factors. Dust, lighting, and background clutter can impact the accuracy of the motion data.
There are additional options available for tracking, such as inertial navigation systems. These can detect position, orientation, and velocity using a second source (e.g., a GPS). However, these trackers struggle with data drift and will need to be corrected while in use. These are typically used as a secondary tracking feature to supplement information and increase tracking accuracy.
What tracking option should I choose?
Well, it depends! For the most part, electromagnetic tracking can cover a wide variety of needs. Whether you’re looking to embed sensors for medical simulation training, or you’re trying to determine motion for robotics/VR applications, or if you’re interested in golf swing analysis, we’ve got an electromagnetic tracker ready to solve your challenge. Our electromagnetic trackers have been used within the medical, military, and biomechanical industries – no problem is out of our reach.
