Xsens MTw Awinda with NexGen HM-Analyzer-X

NexGen Ergonomics is a Xsens system integrator and can provide a total solution with our HM-Analyzer software.

HM-Analyzer-X Software

Our HM-Analyzer maps from one to 15 inertial sensors to various segments of the body (such as trunk, pelvis, arms, etc.) in order to obtain joint angles according to ISB - International Society of Biomechanics (ISB angles are also anatomical angles) or according to AAOS. The software and system are totally scalable allowing you to use any number of sensors as required. The skeleton which is used for visualization can be adjusted according to the subject's anthropometry.

The software takes care of joint definitions and conversions. The user simply needs to identify the segment that is mapped to the specified sensor.

The application synchronizes the data automatically. The user can then perform various analyses within HM-Analyzer or export data. Processing and analysis of off-line or data stored on the built-in inertial sensor memory is also handled by HM-Analyzer.

The calibration procedure consists of the user selecting either the T-pose or I-pose (posture) and clicking "Calibrate" or using the auto-calibration option.

Animation allows you to replay a recording or an offline imported file. You can zoom in and out on the graphs using the mouse wheel.

Recording duration time can be set manually or automatically by specifying the start and end recording time.

DATS (Data Analysis Tool Set) Module

The DATS (Data Analysis Tool Set) module is included and performs a variety of joint angle analysis, filtering and data export. The DATS module provides a graphical user interface (GUI) to perform data analysis. The analysis can be done with streaming (real-time) data or with data that was previously recorded.

The interface uses a graph layout to create various analyses. Tools are available to easily connect the graphical blocks. Data processing block layouts can be saved for reuse.

The DATS module includes various filtering options, biomechanical tools to calculate joint angles (according to the ISB or AAOS) as well as various signal processing tools.

DATS also includes a variety of data filtering options that can be applied which include Butterworth, Chebyshev (1 & 2) and Bessel.

Graphical displays can include raw data such as acceleration or gyro data or computed joint angles according to the AAOS or ISB.

Saved analysis can be saved for reuse or future modifications.

Main Features

  • Capture motion orientation information from inertial sensors.
  • Easily map segments of a 3D model skeleton to inertial sensors and mappings can be saved to be reused in subsequent data acquisition to save time.
  • Dynamically display Euler or Quaternion orientation data as a scrolling, 2D graph.
  • Record multiple recordings each can be subsequently analyzed further and animated.
  • Display recorded data as a static, 2D graph.
  • The center of mass and center of gravity is displayed on the 3D skeleton.
  • Ability to customize 3D skeleton anthropometry
  • Apply filters (APDF, Bessel, Butterworth, Chebyshev I, Chebyshev II, Differentiation, Rectification, Acceleration and Velocity) to streaming (real time) data or recorded data.
  • DATS calculates anatomical angles of a selected limb and displays the data in real-time. ISB (International Society of Biomechanics) and AAOS conventions are supported.
  • Data can be synched with webcam.
  • When using DATS, data can be exported to HDF5 format, CSV & C3D.
  • Several filtering options available which include Butterworth, Chebyshev and, rectification filters
  • Various data options such as Quaternion Splitter, Vector 4D Splitter, Quaternion Multiplexer, Euler to Quaternion Converter

MTw Awinda Hardware Information

MTw Awinda Motion Tracker

Highly accurate, small and lightweight 3D human wireless motion trackers. Used in a body area network, these portable and unobtrusive wireless trackers are ideal for developing customized wearable solutions.

MTw Awinda 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
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 protocol1
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
  Angular velocity Acceleration Magnetic field
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 .10μs) in all connected MTw's, which is essential for accurate joint angles.

Awinda Station Data Receiver

The Awinda Station can receive data from up to 20 MTw's simultaneously. Data from multiple MTw's is time-synchronized to within 10μs. Charges up to 6 MTw's simultaneously.

Awinda Station Specifications
Operating temperature range
Ambient -25°C - 80°C
Specified Performance 0°C - 65°C
Specifications for non-condensing environment. Avoid wet and humid conditions
Power Supply
EU/US/UK power adapters provided
Communication
Awinda Station PC Interface: USB
Physical Properties
Dimensions (without antenna) 148 x 104 x 31.9 mm (5.8 x 4.1 x 1.3 in)
Weight 200g (7 oz.)
Synchronization with third party devices
4 BNC connectors 2 for sync in, 2 for sync out
TTL pulses 0-3.3V levels
Software configurable
Wireless update rates
1 MTw 120 Hz
5 MTw 120 Hz
9 MTw 100 Hz
10 MTw 80 Hz
20 MTw2 60 Hz

2 Maximum number of connected MTw's supported.

Awinda Dongle Data Receiver

This is a miniature version of the Awinda Station.

Awinda Dongle Specifications
Dimensions 20.4 x 45 x 10.6mm (0.8 x 1.8 x 0.4 in)
Weight 8g (0.28 oz.)


MTw and Awinda are trademarks of Xsens Technologies.
HM-Analyzer is a trademark of NexGen Ergonomics Inc.