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--- visual3d:documentation:inertial_measurement_units_overview [2026/06/02 13:23] – wikisysop
+++ visual3d:documentation:inertial_measurement_units_overview [2026/08/18 20:18] (current) – julia
@@ Line 1: / Line 1: @@
-====== Inertial Measurement Units Overview (Under Construction) ======
+====== Inertial Measurement Units (IMU) Overview ======
 =====Inertial Measurement Units=====
-Inertial measurement units are strapped to participants or otherwise worn and combine accelerometers, gyroscopes and sometimes magnetometers. These signals are fused to estimate the pose of the associated segment.
-Visual3D is able to process data from IMU systems that write out an MVNX file.
+Inertial measurement units are strapped to participants or otherwise worn and combine accelerometers, gyroscopes, and magnetometers.
+<WRAP group>
+<WRAP half column>
+{{:visual3d:documentation:imu_schematic.png?400|}}
+</WRAP>
+<WRAP half column>
+{{:visual3d:documentation:imu_fullbody.png?400|}}
+</WRAP>
+</WRAP>
+Accelerometers measure linear acceleration in three axes (X, Y, Z), while gyroscopes are sensors that measure angular velocity around three axes (X, Y, Z). Magnetometers measure the strength of a magnetic field in three axes (X, Y, Z). Combined, you get position, translational and rotational information about a segment. These signals are fused to estimate the pose of the associated segment.
+Note that the coordinate systems of individual IMUs may not always be aligned.
+Visual3D extracts the pose information from IMU systems that write out an MVNX file. **It does not read in the raw IMU data.**
+Check out the [[visual3d:documentation:third-party:xsens|XSens page]], which describes how Visual3D builds the model from the MVNX file.
+[[visual3d:documentation:pipeline:file_commands:import_signals_from_c3d_file#Example: Bring IMU Data into Motion Capture File|Bring IMU Data into Motion Capture File]]