Electromagnetic tracking is a kind of 3D tracking that generates magnetic fields and detects them from a sensor. It is a technology for 6DOF tracking. It can be implemented in an electromagnetic tracking system. Examples of electromagnetic tracking are the Magic Leap 1 controller and the Razer Hydra. The Magic Leap 1 uses magnetic tracking for its handheld controller, but in a poor form.
It can work with a headset if the headset is small enough.
Magnetic tracking preserves high frequency transients in movement, like a flick of a finger.
A metallic object has to be at least a foot or two away from the tracking area so it doesn't interfere. Metallic objects cause jitter and drift.
History
Electromagnetic tracking was invented in about 1970 by Polhemus. Another company that has made electromagnetic tracking gadgets is Ascension Technologies.
Companies
Premo is a company in Spain that markets electromagnetic tracking parts, including coils.[2] Their website is grupopremo.com. Premo's electromagnets are in some AmfiTrack products.[3]
Types
- AC magnetic tracking (Polhemus)
- pulsed DC magnetic tracking (Used by Ascension, later NDI)
Components
SEU stands for system electronics unit. It is used in the context of electromagnetic tracking systems such as the Polhemus Viper and the Polhemus Patriot. It is a box that the sources and sensors plug into.
Industry Standard Coil Architecture
Industry Standard Coil Architecture is the use of three colocated orthogonal quasi-dipole transmitter coils and three colocated quasi-dipole receiver coils.[4]
Examples of this type of system are:
References
- ↑ 1.0 1.1 1.2 1.3 Data, Stats N. "Electromagnetic Tracking System Market". https://www.statsndata.org/report/Electromagnetic-Tracking-System-Market-191994.
- ↑ "VR/AR EM Motion Tracking Components". https://www.grupopremo.com/en/611-vrar-em-motion-tracking-components.
- ↑ "Gen 2 EM Motion tracking System VR Demo Kit". 2019-11-14. https://www.grupopremo.com/resources-center/247-the-revolution-in-the-positioning-and-tracking-system-with-6-degrees-of-freedom/.
- ↑ "System and method for electromagnetic tracking operable with multiple coil architectures". 2003-09-24. https://patents.google.com/patent/US8354837B2.