Post on 20-Jan-2017
A Novel Motion Monitoring System for Activities of Daily Living
Xiang He
New York Institute of TechnologyOld Westbury, NY
October 2015
1. Activities of daily living (ADLs)2. Novel motion monitoring system3. Tests and results4. Conclusion 5. Future work
Content
1. Activities of daily living (ADLs)
Activities of daily living examples
Problems:
•High healthcare cost
•In lack of proactive healthcare
1. Activities of daily living (ADLs)
1. Activities of daily living (ADLs)2. Novel motion monitoring system3. Tests and results4. Conclusion 5. Future work
Content
2. Novel motion monitoring systemMarkerless or marker-based motion capture (mo-cap) system
VSinertial measurement unit (IMU) based mo-cap system
2. Novel motion monitoring system
2. Novel motion monitoring system
Quaternion algorithm
Quaternion
GyroscopeAngular rate
AccelerometerDirection of gravity
MagnetometerDirection of magnetic field
Defection angles roll (X), pitch (Y) and yaw (Z)
2. Novel motion monitoring system
2. Novel motion monitoring system
Motion trajectory reconstruction
() ()
()
QuaternionAlgorithm
Defection angles in three axis (roll, pitch
and yaw)
Acceleration
Velocity
Displacement
2. Novel motion monitoring system
System architecture
Data collection using a IMU-based
device
Real-time signal displaying and saving program
2. Novel motion monitoring system
The IMU-based device: SensorTag (Texas Instruments)
2. Novel motion monitoring system
SensorTag components
2. Novel motion monitoring system
Sensors’ sampling rates and data range
2. Novel motion monitoring systemSensorTag firmware flowchart
• Initialize the device and advertise
• Turn on sensors and send data
• Disable sensors and back to advertising status
2. Novel motion monitoring system
SensorTag connection with smartphone and laptop
2. Novel motion monitoring system
BLE connection with smartphone
2. Novel motion monitoring systemLabVIEW program flowchart
• Establish the connection
• Read and display signals
• Save data and disconnect
2. Novel motion monitoring system
Signals’ display and save
1. Activities of daily living (ADLs)2. Novel motion monitoring system3. Tests and results4. Conclusion 5. Future work
Content
3. Tests and results
•Linear displacement measuring
•Eating gesture monitoring
•Walking monitoring
3. Tests and results
•Linear displacement measuring experiment•Eating gesture monitoring•Walking monitoring
3. Three experiments•Linear displacement measuring experiment•SensorTag system
3. Three experiments•Linear displacement measuring experiment•SensorTag system
3. Three experiments•Linear displacement measuring experiment•Marker-based mo-cap system
3. Three experiments
•SensorTag system displacement measurement error rate
•Linear displacement measuring experiment
•Marker-based mo-cap system
3. Three experiments•Eating gesture monitoring
1 2 3 4
3. Three experiments•Eating gesture monitoring
3. Three experiments•Eating gesture monitoring
3. Three experiments
•Walking monitoring
3. Three experiments•Walking monitoring•Left and right wrists
3. Three experiments•Walking monitoring•Left and right knees
3. Three experiments•Walking monitoring•Left and right ankles
3. Three experiments
•Walking monitoring
•Ankle displacement measurement error rates
4. Conclusion
•The displacement measuring results are good for linear motions.
•The algorithm failed to revise the direction during eating gesture reconstruction.
5. Future work
•Angular and displacement computation.
•More convenient to use on smartphones.
5. Questions?
Thanks for your time.