MTw Development Kit (legacy product)

Wireless motion trackers set

Important: Read the End-of-Life notice

Development kit with wireless, highly accurate, small and lightweight 3D human motion trackers. Used in a body area network, this portable and unobtrusive wireless system is ideal for developing customized wearable solutions.

  • Completely wireless motion trackers
  • Sensor fusion algorithms ensure highly accurate, drift-free output
  • Fast click-in of MTw into the specially designed body straps

Overview

Important: End-of-Life

On October 29, 2015, Xsens has issued an End-of-Life (EoL) notice for the 1st generation of MTw products. Details on the EoL can be found in the End of Life Notice MTw 1st generation (PDF). Please refer to the new MTw Awinda for the 2nd generation MTw.

 

  • Completely wireless and lightweight trackers
  • Accurate output of 3D orientation and inertial data
  • Precise inter-tracker synchronization
  • Retransmission of data while suffering of wireless outages
  • Intuitive Windows software for real-time view, easy logging and export
  • SDK with example code facilitating real-time access to all levels of component data
  • Easy synchronization with other systems
  • Use anywhere: outside, in the office, no lab or simulated environment required
  • Fast click-in of MTw into the specially designed body straps
  • Ideal for research projects, product integration and Human-Robot Interaction

 

Design highlights

Click-in

Click-in straps

The MTw trackers click easily into the special designed body straps. Ensuring minimal subject preparation time.

Blinking-LED

Blinking LED

The LED blinks in sync with the LED of the Awinda Master (Station or Dongle) giving the users the visual feedback that its synchronized.

No-buttons

No buttons

The MTw’s are operated without the use of buttons. While not using them, they will go into a power-saving sleep mode automatically

Specifications

MTw setupThe MTw Development Kit includes

  • 1-32 MTw wireless motion trackers
  • 1 x Awinda station
  • 1 x Awinda USB dongle
  • 1 x Set of full-body click-in straps
  • MT Manager software and Software Development Kit
  • USB cable and power adapter
  • Suitcase

Physical properties MTw Motion Tracker

  • 27 grams
  • 34.5 x 57.8 x 14.5 mm (W x L x H)

Motion trackers orientation performance

Static accuracy (Roll/Pitch)< 0.5 deg
Static Accuracy< 1 deg
Dynamic Accuracy2 deg RMS
Angular Resolution0.05 deg

MTw Development Kit

Wireless communication range for Awinda Station (typical)

Outdoor50 meters (164 ft.)
Indoor open space50 meters (164 ft.)
Indoor office20 meters (65 ft.)

Update rates

MTw internal sampling rate1800 Hz.
Max MTw update rate depending on amount of MTw’s used, e.g.:
1 MTw120 Hz.
6 Mtw75 Hz.
12 MTw50 Hz

Wireless communication range for Awinda Station (typical)

Outdoor50 meters (164 ft.)
Indoor open space50 meters (164 ft.)
Indoor office20 meters (65 ft.)

 

Output Data

  • 3D Orientation (Euler, quaternions, rotation matrices)
  • 3D Acceleration
  • 3D Rate of turn
  • Awinda Station MTw3D Earth magnetic field
  • Static pressure

Synchronization

The Awinda Station is able to send or accept synchronization signals to sync with other data acquisition systems. The synchronization signals are fully configurable within MVN Studio Pro.

  • 2 BNC ports for sync-in (Slave mode)
  • 2 BNC ports for sync-out (Master mode)
  • Industry standard 3.3V TTL pulses

 

Software

Xsens MT Software SuiteMT Software Suite

The MTw Development Kit includes the MT Software Suite containing:

MT Manager Software

An easy-to-use graphical user interface allowing real-time view of 3D orientation and sensor data, recording of data streamed from the MTw’s through the Awinda Station and export to ASCII files for further analysis.

 

Software Development Kit

The SDK gives direct and real-time access to the output of the MTw motion trackers, allowing users to configure and easily integrate the MTw’s in their own applications.

It includes drivers for various operating systems, documentation and various other useful tools. Communication is made easy with the Xsens Device API (XDA) which is completely in C-code. The MT SDK includes the following development tools:

  • C++ wrapper
  • Examples for C, C++ and Matlab.
  • Supported operating systems: Windows and Linux.
  • DLL for both 32-bit and 64-bit systems.
  • Extensive documentation on the MTw, the XBus protocol and the SDK (PDF and HTML)

 

More information and download of the MT Software Suite

 

Synchronization

 

Tried and tested synchronization of data acquisition systems with Xsens systems:

Xsens Synchronization with EMG Systems

Synchronizing with Noraxon EMGLink
Synchronizing with Cometa Wave EMGLink
Synchronizing with Delsys Trigno EMGLink

Xsens Synchronization with Pressure Mats

Synchronize with GAITRite Pressure MatLink

Xsens Synchronization with Optical Systems

Synchronize with ViconLink

Published Papers

Estimation of Ground Reaction Forces and Moments During Gait Using Only Inertial Motion Capture
Journal Articles, Product: MTw, MVN BIOMECH
Angelos Karatsidis, Giovanni Bellusci, H. Martin Schepers, Mark de Zee, Michael S. Andersen and Peter H. Veltink
Estimation of Full-Body Poses Using Only Five Inertial Sensors: An Eager or Lazy Learning Approach?
Journal Articles, Product: MTw, Xsens MVN
Frank J. Wouda, Matteo Giuberti, Giovanni Bellusci and Peter H. Veltink
Sensors...
The Use of Wireless Instrumentation for Stability Testing
Journal Articles, Product: MTw
Henry Boger and Cleo Clency
Bioengineer...
Analysis of Balance during Functional Walking in Stroke Survivors
Journal Articles, Product: MTw
Fokke B. van Meulen, Dirk Weenk, Edwin H. F. van Asseldonk, H. Martin Schepers, Peter H. Veltink, Jaap H. Buurke
PLoS...
Real-time Physics-based Motion Capture with Sparse Sensors
Journal Articles, Product: MTw
Sheldon Andrews, Ivan Huerta, Taku Komura, Leonid Sigal, Kenny Mitchell
London,...
IRIDiuM: Immersive Rendered Interactive Deep Media
Journal Articles, Product: MTw
Babis Koniaris, Ivan Huerta, Maggie Kosek, Karen Darragh, Charles Malleson Joanna Jamrozy, Nick Swafford, Jose Guitian, Bochang Moon, Ali Israr, Kenny Mitchell
Anaheim,...

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