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Inertial Measurement Unit (IMU) calibration tools are
critical in factory settings for removing structural, temperature-induced, and alignment errors to ensure sensor precision
. These tools often consist of a combination of high-precision hardware (multi-axis turntables/rate tables) and automated software to calibrate for bias, scale factor, and axes misalignment.
Key IMU Factory Calibration Equipment & Techniques
- Thermal Calibration Chambers: These are essential for mapping IMU performance across a wide temperature range, typically -20°C to 70°C, to create compensating models for temperature-induced drift.
- Multi-Axis Turntables/Rate Tables: Used to subject the IMU to precise angular velocities and orientations, allowing for the identification of gyroscope and accelerometer bias and scale factor errors.
- Automated Software/Toolkits: Advanced software, such as those integrated with Python (e.g., OpenHTF), automates the data collection, polynomial fitting, and validation of calibration parameters.
- Factorization-based Calibration: A method used to identify and correct multiple error factors simultaneously without requiring complex environmental settings.
Common Factory Calibration Procedures
- Thermal Cycling: Placing the IMU on a PCB in a chamber and varying the temperature to calculate specific calibration parameters for that unit.
- Rate Table Testing: Rotating the IMU on multiple axes to measure and correct for sensor axis misalignment and scale factor errors.
- Data Logging and Validation: Using tools to log raw data (accelerometer/gyroscope) at high frequencies (10 Hz+) to validate the sensor's noise density.
- Error Modeling: Applying a 3rd-order polynomial fit to model the relationship between sensor response and temperature, which is then programmed into the device.
Leading Providers of IMU Calibration Services & Tools
- SPEKTRA: Provides accredited, high-precision calibration systems for IMUs.
- SBG Systems : Offers high-performance IMUs with built-in factory calibration, often using automated testing.
- Gladiator Technologies: Manufactures IMUs that are factory calibrated over the full temperature range, utilizing proprietary VELOXâ„¢ processing.
- Dewesoft: Offers calibration services and software (DewesoftX) for data acquisition and analysis.
- Ericco International: Provides specialized IMU calibration services using factorization-based methods.
- Xsens (Movella) : Supplies IMU modules that provide pre-calibrated data on acceleration and orientation.
Key Considerations for Factory Calibration
- Traceability: Using a database to track test results for each unit (e.g., TofuPilot) is crucial for quality control and auditing.
- Error Correction: Calibration should address non-orthogonal installation, scale factor, and bias.
- Environment: For high-grade IMUs, calibration in a controlled environment is necessary to eliminate external interference.
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IMU self-calibration based on factorization - Ericco Inertial TechnologyJan 12, 2024 — Compared with other traditional IMU calibration methods, the factorization-based self-calibration method has the following advanta...Ericco Inertial Technology
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IMU Thermal Calibration - TofuPilotIntroduction * IMU Overview. IMUs (Inertial Measurement Units) are remarkable sensors that measure the movement and orientation of...TofuPilot
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Factory Calibration and Tests - SBG Support Center
SBG Support Center
https://support.sbg-systems.com
› latest › factory-calibrat...
SBG Support Center
https://support.sbg-systems.com
› latest › factory-calibrat...
These
tools
are powered by an advanvced
calibration
software that automates all the process, including environmental and motion simulation,
calibration
...
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Calibration of Inertial Measurement Units
SPEKTRA LABS
https://www.spektra-labs.com
› ... › Calibration
SPEKTRA LABS
https://www.spektra-labs.com
› ... › Calibration
SPEKTRA LABS offers you manufacturer-independent
calibration
and testing services that ensure the highest precision and long-term reliability of IMUs.
Read more
Instrument Calibration Services
Dewesoft
https://dewesoft.com
› Products › Services
Dewesoft
https://dewesoft.com
› Products › Services
Flexible real-time visual displays. Synchronized video support. PDF and Word reporting
tools
. Data export to many standard file formats.
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(29)
3.2 IMU Calibration & Characterization
VectorNav Technologies
https://www.vectornav.com
› resources › specs-imucal
VectorNav Technologies
https://www.vectornav.com
› resources › specs-imucal
Sensor
calibration
is a method of improving a sensor's performance by removing structural errors from the
measurements
of the sensor.
Read more
Inertial Measurement Units (IMU)
Inertial Labs
https://inertiallabs.com
› IMU
Inertial Labs
https://inertiallabs.com
› IMU
IMU
Supported Software ... Inertial Labs supplies drivers and
tools
for easy integration with commonly used platforms such as ROS, LabVIEW, and Waypoint products.
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A Complete Guide to Inertial Measurement Unit (IMU)
JOUAV
https://www.jouav.com
› blog › inertial-measurement-u...
JOUAV
https://www.jouav.com
› blog › inertial-measurement-u...
Apr 17, 2025
—
They are integrated into wearable devices and research
tools
to provide detailed insights into motion patterns, joint angles, and accelerations.
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IMU Sensors - Mini calibrated Inertial Measurement Unit ...
Inertial Sense
https://inertialsense.com
› imx-imu
Inertial Sense
https://inertialsense.com
› imx-imu
The IMX-5â„¢ is a 10-DOF sensor module consisting of a tactical grade
Inertial Measurement Unit
(
IMU
), magnetometer, and barometer.
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Calibration of an Inertial Measurement Unit (IMU) with ...
Maker Portal
https://makersportal.com
› blog › calibration-of-an-inerti...
Maker Portal
https://makersportal.com
› blog › calibration-of-an-inerti...
Dec 29, 2020
—
Calibration
of an
Inertial Measurement Unit
(
IMU
) with Raspberry Pi - Part I ... “As an Amazon Associates
Program
member, clicking on links may ...
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$3 to $95
Inertial Measurement Unit BMI260
Bosch Sensortec
https://www.bosch-sensortec.com
› products › imus › b...
Bosch Sensortec
https://www.bosch-sensortec.com
› products › imus › b...
Software &
tools
. Main Navigation; Software &
tools
; Overview; Software. Main Navigation; Software &
tools
Overview; Software; Overview · Sensor Fusion Software ...
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Kyle-ak/imu_tk
GitHub
https://github.com
› Kyle-ak › imu_tk
GitHub
https://github.com
› Kyle-ak › imu_tk
Requirements. The code is tested on Ubuntu 14.04.
IMU
-TK requires the following
tools
and libraries: CMake, Eigen3, Ceres Solver, OpenGL, QT and Gnuplot. To ...
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