Electromagnetic tracking
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 a tracking area so the metallic object doesn't interfere with the tracking measurements. Metallic objects cause jitter and drift.
Companies[edit]
Electromagnetic tracking was invented by Polhemus, which originally was researching navigation in aircraft. Another company that has made electromagnetic tracking gadgets is Ascension Technologies.
Premo is a company in Spain that markets electromagnetic tracking parts, including coils.[2] Premo's electromagnets are in some AmfiTrack products.[3]
Types[edit]
- AC magnetic tracking (Polhemus)
- pulsed DC magnetic tracking (Used by Ascension, later NDI)
Components[edit]
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[edit]
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[edit]
- ↑ 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.