Comments (3)
The following is from the FAQ on the x-io website. Fusion provides a measurement of Earth acceleration.
Can I measure position using an IMU?
IMUs do not provide a direct measurement of linear velocity or position. IMUs provide inertial sensor (gyroscope and accelerometer) measurements alongside a measurement of 3D orientation relative to the Earth’s surface, often expressed as the Euler angles roll, pitch, and yaw.
Our IMUs also include a magnetometer so that orientation is measured relative to magnetic north, and a sensor fusion algorithm to provide measurements of linear acceleration and earth acceleration. Earth acceleration is the second derivative of the IMU’s position in the Earth coordinate frame.
An IMU can be used to indirectly measure linear velocity and position in certain applications. However, this is only possible using specialised algorithms specific to the given application. For example, we have demonstrated how an IMU attached to a person’s foot can be used to precisely track the 3D position of the wearer; or how oscillatory motion such as the heave of an ocean buoy or the respiratory motion of a patient’s chest during a medical scan can be measured using an IMU.
It is important to understand that these demonstrations and algorithms are highly specialised and cannot be repurposed for generalised 3D tracking. Our IMUs are the ideal research tool for those wishing to develop tracking solutions using IMU technology. However, if you require an off-the-shelf, general-purpose, position tracking solution then you should consider alternative technologies such as GNSS or camera-based systems.
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Thank you very much for your information :)
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:)
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Related Issues (20)
- Python 3.12 Install Issue HOT 3
- After most recent changes, FusionAhrs.initialising flag never set. HOT 8
- Question: About the details of the Fusion algorithm HOT 2
- Rust bindings HOT 7
- Guidance on tuning Fusion for "responsiveness" HOT 2
- Inferring gyroscope range HOT 3
- Roll and pitch relative to device, yaw relative to earth HOT 2
- Linear/earth acceleration very slow to catch up with movement HOT 3
- TEST data HOT 1
- Python "No code object available for imufusion" with Setup.py or pip install HOT 4
- Measurement convention for sensors other than x-imu HOT 3
- How to use the magnetometer data with different sampling frequency from the inertial sensors? HOT 1
- Gyroscope Offset Algorithm HOT 7
- Link to dissertation is broken HOT 1
- Q: Influence of motion and external acceleration HOT 3
- Very noisy Roll Pitch Yaw data HOT 5
- Recommended sampling rate? HOT 2
- yaw value changes while rotating on only roll or pitch axis. HOT 3
- 5 seconds delay in real-time operation (python) HOT 2
- Need some help setting up the algorithm. HOT 14
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