MVN BIOMECH - Biomechanical Motion Sensor

MVN BIOMECH is an ambulant, full-body, 3D human kinematic, camera-less measurement system. It is based on state-of-the-art MEMS inertial sensors, biomechanical models and sensor fusion algorithms. MVN BIOMECH is ambulatory, can be used indoors and outdoors regardless of lighting conditions. The results of MVN BIOMECH trials require minimal post-processing as there is no occlusion or lost markers. Results can easily be exported to other software applications.

MVN System Features

Unieke Features van het MVN Systeem:

• Full magnetic immunity
  • Immuun to magnetic interference in live settings from things like metal/iron/equipment
  • Allows you to use this system in environments without any restrictions like: buildings, labs, treatment rooms and outside
• HD Reprocessing: offline engine which improves the quality of data after a recording
  • Skin artefacts correction
  • Foot slide correction
  • Multiple contact point correction
  • Improving consistency of data
  • Improving joint angle and 3D Kinematic accuracy of data
  • Improving the accuracy of the estimation of the 3D Global position
• Internal sampling rate
  • 1000 Hz sampling rate
  • Strap down integration for optimal wireless data transfer
• 6 Degrees of Freedom (DOF) o 3D joint angles
  • Anatomically correct 3D joint laxity
• Multiple contact point detection: which enables tracking of movements like:
  • Stair climbing, jumps, breakdancing, walking on hands etc.
• MVN Remote App
  • Sync with camera from smartphone
  • Control basic features of MVN software with phone: start/stop recording, avatar to origin and time markers placement
• Global 3D position error in live setting*
  • o approximately +/- 1% of covered distance
  • o *By using HTC Vive this can be optimised
• Multi level tracking
  • o Multiple levels are available during and after recording: single/multi/no/vehicle/soft floor
  • o The system is able to measure jumping and running: the 3D avatar will get off the floor and height is estimated right. Multilevel tracking live; The system is able to measure height changes in the global 3D. (e.g. able to measure stairclimbing)
• Wireless
  • With the Awinda station a range of +/- 50m
  • Within tracker communication through patented radiofrequency protocol.
• Suited for every person
  • Strap based placement of sensors
  • T-shirt in sizes S t/m XXXXL

MVN Awinda

MVN Awinda is an ambulatory 3D human kinematic measurement system. MVN Awinda uses small on-body wireless motion trackers which are attached on a special designed strap set for the limbs, feet, hands, head and strap set. For tracking the sternum and should, Xsens designed a special shirt (available in 3 sizes). The MVN Awinda system is based on Xsens proven and patented technology. Using state of the art inertial motion trackers, sensor fusion algorithms, specialized wireless protocols and validated biomechanical models, highly accurate kinematic data is generated.

MVN Awinda can be used indoors and outdoors regardless of terrain or lighting conditions. The results of MVN Awinda trials require no post-processing as there is no occlusion or lost markers.

Exported MVN Awinda data can be easily used in other software applications.

Features

• 17 wireless on-body motion trackers
• Output update rate: 60Hz
• Internal sampling rate: 1000Hz
• Inter-tracker wireless synchronization: <10 microseconds.
• Battery life: 6.5 hours
• Retransmission of lost data packages (1 minute buffer when out of range.)
• Specifications of motion trackers:
  • Static Accuracy (Roll/Pitch) 0.5 deg RMS Static Accuracy (Heading/Yaw) 1 deg RMS Dynamic Accuracy (Roll/Pitch) 0.75 deg RMS Dynamic Accuracy (Heading/Yaw) 1.5 deg RMS
  • Accelerometer range: +/- 160 m/s2
  • Gyroscope range: +/- 2000 deg/s
• Full-body set of straps, including M/L/XL size shirts, gloves and footpads
• Awinda receiver, sync and charging station + 2 additional charging stations. (range up to 50 meters outdoors)
  • Wireless connection is based the patented Awinda protocol
  • Possibility to choose between 15 different radio channels for improving the wireless stability of the system.
• Possibility to use Awinda Dongle instead of Awinda receiver (range up to 20 meters outdoors)
• Synchronization with third party devices is possible through 2 input - 2 output BNC ports on the Awinda station. Sync with other data acquisition systems through TTL pulses 0-3.3V). System can act as master or slave.
• Possibility to add up to 4 prop motion trackers.
  • Can be added to the biomechanical model of MVN software to create extra joint angles and segment orientations

MVN Link

MVN Link is an ambulatory 3D human kinematic measurement system. The MVN Link system contains two types of motion trackers; the single MTx used as end trackers and the string of three MTx-STR The motion trackers, MTx, and MTx-STR are the miniature inertial measurement units containing 3D linear accelerometers, 3D rate gyroscopes, 3D magnetometers, and a barometer, which measures atmospheric pressure. These trackers are placed at strategic locations on the body (fixed by the suit), to measure the motions of each body segment.

The MTx trackers are positioned on the pelvis, sternum, hands, and head. The MTx-STR’s are used to chain the legs (upper leg, lower leg, and feet), as well as for the upper body (shoulders, upper arms, and for-arms). The MVN Link system is based on Xsens proven and patented technology. Using state of the art inertial motion trackers, sensor fusion algorithms, specialized wireless protocols and validated biomechanical models, highly accurate kinematic data is generated.

MVN Link can be used indoors and outdoors regardless of terrain or lighting conditions. The results of MVN Link trials require no post-processing as there is no occlusion or lost markers.

Exported MVN Link data can be easily used in other software applications.

Features

• 17 wireless on-body motion trackers
• Output update rate: 240Hz
• Internal sampling rate: 1000Hz
• Inter-tracker wireless synchronization: <10 microseconds.
• Battery life: 9.5 hours
• (remote) On-Body recording
• Specifications of motion trackers:
  • Static Accuracy (Roll/Pitch) 0.5 deg RMS Static Accuracy (Heading/Yaw) 1 deg RMS Dynamic Accuracy (Roll/Pitch) 0.75 deg RMS Dynamic Accuracy (Heading/Yaw) 1.5 deg RMS
  • Accelerometer range: +/- 160 m/s2
  • Gyroscope range: +/- 2000 deg/s
• Lycra suits
  • Light weight revolutionary stretch fabric with exterior zippered channels for trackers and wires
  • Purchase separately (sizes: S / M / L / XL / XXL)
• Wireless receiver
  • WiFi 2.4 GHz / 5.0 GHz
  • Ethernet interface
• Wireless range 50/150 m (indoor/outdoor)
• Synchronization with third party devices is possible through 2 input - 2 output BNC ports on the Awinda station. Sync with other data acquisition systems through TTL pulses 0-3.3V). System can act as master or slave.
• Possibility to add up to 4 prop motion trackers.
  • Can be added to the biomechanical model of MVN software to create extra joint angles and segment orientations

MVN Analyze Pro

• Software allows you record movements of up to 4 systems synchronized and simultaneously in 1 software instance.
• The software visualizes anatomical model (in accordance with ISB) included with 23 body-segments and 22 joints.
• The data can be exported in different file formats:
  • Open XML format
  • C3D
  • FBX
  • BVH
• A special protocol for streaming the 3D motion data onto the network of up to 4 suits is included. The protocol can be based on both UDP and TCP communication protocol.
  • Streaming plug-in for Unity 3D
  • Streaming plug-in for Maya
  • Streaming plug-in for MotionBuilder
  • Time code sync available
  • Export file as movie possible
  • Streaming plug-in for Siemens Jack
• Open Exported Data in ViveLab Ergo Vivehuman
• The software visualizes and outputs 3D kinematics of 23 segments:
  • 3D global position
  • 3D velocity
  • 3D acceleration
  • 3D angles
  • 3D rate of turn
  • 3D rotational acceleration
• The software visualizes and outputs the joint angles of 22 joints
• The software visualizes and outputs the sensor data:
  • 3D Magnetic Field
  • Free acceleration
  • 3D Orientation
• The software visualizes and outputs the 3D position of the Centre of Mass of the subject
• The data can be visualized in graphs by dragging and dropping:
  • Time based plots
  • Phase plots/Coordination plots
• The data can be exported in different file formats:
  • Extended XML format (.MVNX)
  • Extended C3D
• Possibility to export contact points
• In real time, temporal markets can be added and exported.
• The joint angle between the scapula and humerus are provided in 2 different Euler sequences to avoid the mathematical limitation of Gimbal lock

Patents

• US 8165844 B2 (Motion tracking system)
• WO 2011015939 A3 (Inertial sensor kinematic coupling)
• US 20120223846 A1 (Compression of imu data for transmission of ap)
• US 20080262772 A1 (Sytem and a Method for Motion Tracking Using a Calibration Unit)
• US 20110109438 A1 (Method and A System for Enabling A Wireless Communication Between A Master Unit and A Sensor Unit)

Xsens Analyze Hardware Options

MVN Awinda Starter

• Accurate full-body motion capture with 17 sensors
• Fully wireless sensors with straps
• Wireless range up to 25 meters
• Easy charging with USB

Image Credit: Movella Inc.

MVN Awinda

• Accurate full-body motion capture with 17 sensors, plus 1 additional prop sensor
• Fully wireless sensors with straps
• Wireless range up to 50 meters
• Easy charging with charging station

Image Credit: Movella Inc.

MVN Link

• Full-body motion capture for high dynamic motions
• High update rate for extra accuracy
• Long battery life for 10 hour-long recordings
• Supports GNSS and (Remote) On-Body Recording

Image Credit: Movella Inc.

Xsens Gloves by Manus

• Accurate finger tracking
• Natively integrated into MVN Animate software
• Body and finger tracking data combined in one file

Image Credit: Movella Inc.

Table 1. Source: Movella Inc.

Xsens Analyze Software Options

Table 2. Source: Movella Inc.

*position/orientation