Xsens MTw Awinda

Xsens MTw Awinda – Highly accurate, small and lightweight 3D human wireless motion tracker. Easy to integrate wireless human motion tracker for real-time applications. Used in a body area network, these portable and unobtrusive wireless trackers are ideal for developing customized wearable solutions. The Awinda radio protocol ensures time-synchronization better than 10 µs between each MTw on a wireless body area network.

Overview

Ergonomics

Workplace Ergonomics
Virtual Verification

Health & Safety

Therapy
Prevention
Rehabilitation
Pedestrian Navigation

Sports

Injury prevention
Performance science

Research

Biomechanics
Gait Analysis

Virtual Reality

Training & Simulation
Head tracking
Game

Human Machine Interaction

Robot

System Integration

Integration with the MTw is very straightforward with the Xsens MT Software Suite. The MT Software Suite is an easy-to-use API which can be interfaced with via a COM, C and C++ interface with support for Windows and Linux. The components of the MT Software Suite are:

Xsens Device API	Easy to use Xsens Device API to communicate with the MTw Awinda interfaces for common programming languages.
Example code	Example code To make starting with the MTw even easier, example code is provided for various platforms, amongst others Matlab and Linux.
MT Manager	An intuitive GUI for Windows, including configuration and recording tools, graphs and a wireless configuration setup to help understand the Xsens Awinda System.
Magnetic Field Mapper	Magnetic Field Mapper An algorithm and tool to calibrate the MTw for hard and soft iron effects. The calibration can be done during normal operation; there are no restrictions on the trajectories or rotations.
Documentation	Documentation Full (HTML)-documentation on the MTw, API, SDK and application notes.
Synchronization	Tried and tested synchronization of data acquisition systems with Xsens: Synchronization with EMG Systems Synchronizing with Noraxon EMG Synchronizing with Cometa Wave Synchronizing with Delsys Trigno EMG Synchronizing with BTS FREEEMG Synchronizing with TMSI EMG Synchronizing with Biometrics DataLOG Synchronization with Optical Systems Synchronize with Vicon Synchronization with Pressure Mats Synchronize with GAITRite Pressure Mat Synchronization with EEG systems Synchronize with ANT Neuro

System Integration

Specifications

Tracker placement	Easy fastening with Velcro straps
Internal sampling rate	1000 Hz
Latency	30 ms
Buffer time (retransmissions)	10 s
Battery life (continuous use)	6 Hours
Dimensions Tracker	47 x 30 x 13 mm (1.85 x 1.18 x 0.51 in)
Weight	16 g (0.56 oz.)
Operating temperature range	0°C – 50°C

Wireless update rates

1 MTw	120 Hz
5 MTw	120 Hz
9 MTw	100 Hz
10 MTw	80 Hz
20 MTw (maximum)	60 Hz

Communication

Range	Awinda station	Awinda dongle
Open space	Up to 50 m (165 ft.)	Up to 20 m (65 ft.)
Office space	Up to 20 m (65 ft.)	Up to 10 m (33 ft.)
Wireless protocol	Xsens patented Awinda protocol ¹
Receiver	Awinda Station / Awinda Dongle

Orientation

Static Accuracy (Roll/Pitch)	0.5 deg RMS
Static Accuracy (Heading)	1 deg RMS
Dynamic Accuracy (Roll/Pitch)	0.75 deg RMS
Dynamic Accuracy (Heading)	1.5 deg RMS

Tracker components

Dimensions	3 axes	3 axes	3 axes
Full scale	± 2000 deg/s	± 160 m/s2	± 1.9 Gauss

1 The patented Awinda protocol ensures highly accurate time synchronized data sampling
(within 10 μs) in all connected MTw’s, which is essential for accurate joint angles.