Related software

MVN BIOMECH has been designed specifically for biomechanics end-users.

It is an ambulant, full-body, 3D human kinematic, camera-less measurement system. MVN BIOMECH combines state-of-the-art hardware: MEMS inertial sensors with advanced software: Xsens sensor fusion algorithms and validated biomechanical models. The result is highly accurate kinematic data regardless of the capture environment: in a research lab, on the ski slopes, or even in the sky with no need for simulated test environments.

The results of MVN BIOMECH trials can easily be exported to other software applications. C3D is a commonly used format in the biomechanics field, and has been added as an export format to MVN BIOMECH. This ensures that users can import MVN BIOMECH data to their standard C3D reader.

Siemens PLM Software Jack

Xsens has partnered with Siemens PLM Software to enable the quick and easy integration of its highly accurate human motion data capture solution with the world-class Jack software package.

Importing Xsens motion capture data into Jack enables realistic task analysis of real humans carrying out real movements. MVN BIOMECH is a mobile solution and can be used anywhere: on an assembly line, on a factory floor, in tight spaces like a car or an airplane, as well as in the great outdoors, without the need for simulated environments or additional equipment.

Visual 3D from C-Motion

A successfully tested software application for reading C3D exported using MVN BIOMECH is Visual 3D software from C-Motion. A free CMO/C3D reader can be downloaded from http://www.c-motion.com/exchange/exchange.php.

Visual3D is hardware and marker set independent. Marker sets can be easily imported for users to create purpose-built models. Using the 63 marker set from MVN BIOMECH, full body 3D kinematic analysis and is possible. Its analytical power and object architecture makes Visual3D a compelling product for clinical assessments, visualizing 3D data, and measuring the performance of movement related therapies, sports related motion, virtual reality activities, and many other biomechanical applications.

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MVN Studio PRO Software

MVN Studio PRO is included with every Xsens MVN BIOMECH order.

MVN Studio PRO is a software application for capturing motion of the subject wearing the MVN suit/Strap system.

MVN BIOMECH human models

MVN BIOMECH uses a 23 segment biomechanical model with 22 joints.
Each joint is specified by statistical parameters for 6DOF joint laxity.
An advanced spine and shoulder model is used to compute the kinematics of the spine and shoulder blades.
Anthropometric scaling or user-specified segment dimensions.

Sensor to segment calibration

Easy calibration, with animated instructions. Feedback of expected accuracy provided and advice for improvement (when necessary).

Using preset delay, calibration can be carried out without assistance.

Basic calibration

• Duration <10 s
• Requires only subject and foot lengths as input
• Pose easy to replicate for range of subjects

Advanced calibration

• 10-30 seconds per additional step
• Advanced subject specific calibration determines MTx alignment and/or subject specific dimensions

Note: Calibration procedures for subjects with limited range of motion are also possible

3D translation

• Double integration of body segment accelerations allows for jumping/running (permanent floor contact is not needed)
• ~2% error in travelled distance (without external aiding)
• Advanced external contact model detects body world contacts to enable crawling, sitting, cartwheels etc.
• Full control over external contact points
• Seamless fusion with aiding technologies possible¹

Magnetic environment

Full immunity to temporary magnetic disturbances (~30 seconds).

Visual warning of disturbed environment.

Addition of KiC means that during dynamic measurements, highly accurate joint angle data can still be produced over long periods even in magnetically disturbed environments.

Local, permanent disturbances

High degree of immunity, performance will depend on motion and environment.

Soft tissue artifacts

Minimized to ~2 degrees RMS using redundancy in measurement and biomechanical constraints.

Multiple person motion capture

Up to four person motion capture on one PC.

Prop/object tracking

Support for up to three additional trackers to be (prop trackers).

MVN Studio PRO functionality

Real-time preview of:

• 3D character, in 3D view port, or single plane (orthogonal) view
• Body centre of mass
• Biomechanical model
• Synchronised video data, using the reference Ethernet video camera provided
• Simultaneous recording/viewing

Replay previously recorded motion data optionally synchronised with video reference.

Edit ground level (eg for stair climbing) and contact point data.

Graphical representation data.

Streaming motion data

Streaming motion data on local area network (UDP).

Motionbuilder 2009 -2010 compatible client plug-in available.

Client network monitor support in MVN Studio PRO.

MVN Studio data rate

39 Mb/min @ 60 Hz
66 Mb/min @ 100 Hz
79 Mb/min @ 120 Hz

Parameter output

Kinematics of 23 segments (position, velocity, acceleration, orientation, angular velocity and angular acceleration).

3D joint angles of 22 joints.

Body centre of mass.

Factory calibrated sensor data:

• Angular velocity
• Acceleration
• Orientation
• Magnetic field

Output formats

• MVN (proprietary MVN data)
• MVNX (MVN Open XML format)
• C3D (Coordinate 3D) [link to TAB “related software” of MVN BIOMECH page]
• BVH (Biovision Hierarchical Data)
• FBX (Motion Builder)

Update rate

Internal update rates 120, 100, 80, 60 Hz
Export frame rates 120, 100, 60, 50, 30, 25, 24 Hz

Recommended computer system

• Operating system:
  Windows XP (SP2) or Windows 7
• Processor:
  Quad core or higher (2.5 GHz or faster) 4 GB RAM
• Graphic card:
  Any graphics card with hardware acceleration for DirectX 9
• USB Ports:
  2x USB or hub per system

Extra software

To facilitate use of MVN data in different software environments, additional software packages are available to purchase:

MVN BIOMECH Software Development Kit

• Easy integration with custom application software
• Provides real-time joint angle and orientation and position data of body segments using dynamic link library (C interface)
• Provides interfaces to calibration routines and character definition routines
• Handles pre-recorded MVN files for post-processing
• MVN Studio Fusion Engine handles real-time 3D position aiding input

Time code and remote control plug-in

• Time code stored in MVN, MVNX (optional), C3D and FBX
• Remote control of recordings in MVN Studio

Motion Builder Plug-in

Motion Builder 2010 - 2012 Plug-in is an optional software package allowing easy, real-time integration with MotionBuilder.

The 'net streamer' feature of MVN Studio PRO enables streaming of data via several protocols to different applications, e.g. Motionbuilder. Real-time pre-visualization is available in a simple point-and-click environment. The plug-in also enables skeletal data to be transferred from multiple characters and layered in real-time via a live remote control interface to essentially use MotionBuilder as an animation-recording tool.

¹ Some features are only available in SDK, ask for possibilities

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