NODES – 9DOF Motion Suit for VR rehabilitation gaming

Human motion tracking using IMUs

Nodes is a motion capture system intended for medical/research purposes to measure and record the orientation of human body segments. When the system is placed on a body segment, it estimates its orientation in the 3D space and the motor skills parameters related to the examined body part can be computed. When the system is connected to two or more consecutive body segments (interconnected by joints), it’s possible to measure and record relative orientations among segments as well as angles between joints.

Intended use – research, clinical and home rehabilitation

The device is intended to be used for treatment and rehabilitation of patients that suffer from an injury or handicap. The data collected is made available to a medical professional who can use it to support his diagnosis and/or therapy plan or to gain insights into a patient’s mobility capacity.

Biomarkers for cardiovascular disease
This project was made possible by a contribution from the European Regional Development Fund as part of OP-Zuid. For more information see EFRO.

Our focus areas

Accurate results

Highly accurate sensors using state of the art sensor fusion algorithms.

Mobile & modular

Single sensor up to full body sensor suits with 20 sensors. Direct streaming to mobile devices.

Quick & easy to use

Fast setup for both home rehabilitation and clinical use.

VR rehabilitation

Low latency real time streaming of quanterion or raw data. 

Affordable

Affordable technology for a wide audiences.

Nodes 9D Motion Tracking Solution for rehabilitation

Problem

Healthcare is increasingly moving into the living room, and it is also being stimulated that people take more and more control over their own lives. In addition, exercise and sports are becoming increasingly important in healthcare, especially now that the focus is much more on prevention. Also in case of illness (e.g. stroke) or after surgery it is expected that you work on recovery in the home environment. However, the recommended exercises and thus recovery often do not take place because patients are misinformed, guidance is kept to a minimum and they are not motivated to work on their recovery.

Nodes 9D Motion Tracking Solution for rehabilitation and VR rehabilitation gaming
9DOF Motion Suit for Sports

Our solution

The aim of the NODES project is to make responsible movement and exercise “fun and motivating”, while giving care providers a good insight into the exercises that have been done to determine the next steps for recovery.

Joint exploration

To achieve this, two technology partners and four application partners consisting of hospitals, physiotherapy practises and sport school collaborate to build, improve and validate a complete motion capturing solution. 

Virtual Reality rehabilitation & fitness gaming

With this development, the participants respond to current trends and themes within care such as self-direction, self-management and care within the home environment.

9D Motion Sensor Suit

Technical Specifications

System specifications

Data architecture

Connect 1-5 NODES sensor strings to a main unit (up to 20 sensors). Main unit communicates wireless to PC with Matlab/Unity.

Wearability

  • Jacket & trousers / complete suit for home rehabilitation
  • Strap based solution: clinical use
  • Body adhesives: clinical use

Motion data

  • Raw 9DoF data (accelerometer, gyroscope, magnetometer)
  • Quaternions, integrated bio-mechanical model (18 segments)

 

Output rate

  • 33Hz (Bluetooth, with 19 Nodes)
  • Up to 100Hz (1 string wired connection)

Setup time

Approximately 3-7 minutes (depending on wearable solution) 

Latency

30ms (Bluetooth)

Battery life

6h (19 nodes connected and Bluetooth on)

Main unit

Connectivity

  • Sensor port: connect 1-5 strings – micro USB
  • Charging port: USB-C (5V, 2A)
  • Bluetooth wireless data streaming

Buttons / Indicators

  • Power on/off button: yes
  • Battery level: yes
  • Bluetooth connect: yes
  • String indicator: Left Arm, Right Arm, Left Leg, Right Leg, Trunk

Product design

  • Waterproof: yes

 

NODES main unit

Sensor string

Connectivity

  • Sensor connect to main unit: micro USB
  • Sensors per string: 1-4 pcs

Sensors

  • Accelerometer
  • Gyroscope
  • Magnetometer

Product design

  • Waterproof: yes
9D Motion Sensor Suit- 9D IMU sensor

Computer

Minimum requirements

  • Intel i5, 1.8GHz, 4Gb RAM or more
  • Built-in Bluetooth module or external Bluetooth module

Supported OS

Windows 10 and later (x64)

Unity sensor data visualization

Sensor Placement

Trunk, shoulders & head

Head and back sensor placement

Hand, arms & shoulders

Arms, shoulders sensor placement

Feet, legs and trunk

Leg & feet sensor placement

Raw data or Quaternions

Quanterions

each sensor’s table presents 4 columns and as many rows as number of samples collected.



Quanterions data output

Raw measurement data

each sensor’s table presents 9 columns and as many rows as number of samples collected.

Accelerometer Data are reported in g. Gyroscope data are reported in rad/s. The magnetometer data are reported in G.

Raw measurement data output

Partners

2M Engineering

Fantazm / Inmotion VR

Erasmus Medical Centre / Rijndam

Fontys Sporthogescholen

Ki2Move

Rijnstaete revalidatie

en_USEnglish
nl_NLDutch de_DEGerman en_USEnglish