inertial measurement unit introduction accelerometer gyroscope magnetometer working principle construction/setup application imu application for knee angle measurement

1. COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
COCHIN UNIVERSITY COLLEGE OF ENGINEERING, Kuttanad
DIVISION OF MECHANICAL ENGINEERING
SEMINA
R ON
An Introduction To Inertial
Measurement Units
Applications For Human Movement
Presented by
23.VISHNU G MANOJ
S8ME[2019-2023]
Register no; 20519525

2. TABLE OF CONTENTS
Introduction
Working principle
Construction/SETUP
Applications
Application of IMU for knee angle measurement By XSENS.

3. INTRODUCTION
Motion measurement instrument.
Measures the direction,forces acting on a body,orientation,velocity&acceleration.
It consist of a accelerometer,gyroscope and sometimes a magnetometer.
Accelerometer; An accelerometer measures change of linear velocity of moving or vibrating object.
Gyroscope; A gyroscope detects change in orientation or in other words angular velocity.
Magnetometer; A magnetometer measures the magnetic field at a particular location.

4. 6 AXIS IMU & 9 AXIS IMU
In real time problems (3D space) a body have 6 degrees of freedom.
3 linear & 3 rotational movements.
3 Axis accelerometer sensor measures the 3 linear axis movement.

5. 6 AXIS IMU & 9 AXIS IMU
3 Axis magnetometer sensor measures the 3 rotational axis movement.
3 Axis magnetometer+3 axis accelerometer together called 6 axis IMU.
6 axis IMU together with 3 axis magnetometer is called 9 axis IMU.

6. WHAT IS MEMS?
Micro Electro Mechanical System.
Tiny machines which is not visible to human eye(micro machines).
Micro machines of varying width of 1-100 microns.
It contains both mechanical & electrical elements.
Mechanical elements are used to collect data.
Electrical elements are used to process data.
Sensors; gather information from surrounding.
Actuators; executes the given commands.

7. MEMS ACCELEROMETER MICRO PROCESSOR UNIT
MEMS APPLICATIONS MEMS ADVANTAGES
Crash sensing device for air bag system
(measures the force).
MEMS incorporated projectors & printers
for producing colorful images from black
and white images
Increases the accuracy.
Reduce the cost.
Reduce the number of mechanical&
electrical devices.

8. WORKING PRINCIPLE
MEMS ACCELEROMETER;

9. MEMS GYROSCOPE;

10. MEMS MAGNETOMETER;
Hall effect.
Magneto-resistive effect.

11. IMU SETUP USING ARDUINO
GY-80 ARDUINO BOARD
I^2C Connection
ARDUINO PROGRAM

12. IMU APPLICATIONS IN AUTOMOBILE
Electronic Stability Control(ESC)/Electronic Stability Program(ESP).
Self Driving Cars-tracking of movement.
Cornering ABS/Cornering traction control.
Wheely control.
Cornering light.

13. IMU APPLICATIONS
AUTOMOBILES.
AIRCRAFTS.
DRONES.
SPACE CRAFT.
MISSILES.
SHIP&SUBMARINES.
CAMERA STABILIZERS.
CONSTRUCTION EQUIPMENTS.
ROBOT ARM MOVEMENT.

14. IMU APPLICATION FOR HUMAN MOVEMENT-
KNEE ANGLE MEASUREMENT

15. XSENS
Xsens Technologies B.V. is a supplier of 3D motion capture products, wearable sensors and inertial sensors
based upon miniature MEMS inertial sensor technology

16. METHODS

17. CONCLUSIONS
IMUs are used to measure acceleration, angular velocity and magnetic fields, and, when combined
with sensor fusion software, they can be used to determine motion, orientation and heading
They’re found in many applications across consumer electronics and the industrial sector.
IMUs will provide more accurate information.
IMUs will help to incorporate advanced features.

18. REFERENCES
Inertial measurement unit-based motion capture to replace camera-based systems for assessing gait in
healthy young adults: Proceed with caution[2022]-Julie Rekant
Wikipedia
Oscarliang.com- for understanding Arduino based accelerometer setup.
Measuring upper arm elevation using an inertial measurement unit: An exploration of sensor fusion
algorithms and gyroscope models.[2022]-Howard Chen, Department of Mechanical Engineering,
Auburn University, AL, USA
MEMS&NANO TECHNOLOGY EXCHANGE.
XSENS.COM.

19. THANK YOU
FOR
YOUR ATTENTION