Isotropic 3D antennas target AR/VR and motion capture

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By eeNews Europe

Offered in a small SMT package for industrial assembly lines, the devices implement electromagnetic motion tracking for the real-time precise tracking of the position and orientation of objects in space.

While several hardware technologies can be used for tracking, electromagnetic technology offers some clear advantages in terms of line of sight, latency and precision, according to Premo.

Electromagnetic motion capture relies on a 3D emitter antenna that creates a three-dimensional magnetic field (using different low frequencies for each one of the three axis of the space). When an object that bears a receiver (or sensor) antenna enters the electromagnetic field, the electromagnetic tracking system can calculate accurately and in real time the object position and orientation in the environment. It does so using the information of rotation and position obtained by the receiver coil by means of a three-dimensional vector calculation system.

Premo offers both emitter and receiver 3D antennas for these applications, designed in many sizes, depending on the target range, size and energy consumption. The 3DTX10 and 3DTX08 family of emitter coils are useful to provide very high precision motion capture in the range of 20-50cm, depending on the Rx-sensor (6x6mm to 11×11 or 15x15mm) in use.

The very same approach is used to capture movement of full body suits or gloves. In theses 6DoF applications (real high-precision and no limitations in terms of line of sight, ultra-low latency and lower consumption is needed), the size of the emitter antenna is preferred to be as small as possible. Therefore, the 3DTX08 and 3DTX10 were designed keeping this in mind.

These parts are to be delivered in mass production on tape & reel for SMT pick & place assembly according to EIA 481. They have been engineered to be RoHS and REACH-compliant and have also been tested for endurance to comply with AECQ200 standards for automotive and IEC 68000 standards for industrial, wearable and general applications.

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