Device orientation calibration system
US12066301B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2022 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Feb 2, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device orientation calibration system to perform operations that include: accessing inertial measurement unit (IMU) data generated by an IMU mounted upon an object that corresponds with a first reference frame, the IMU data indicating a second reference frame that comprises a Z-axis, a Y-axis, and an X-axis; performing a calibration of the IMU data to align the second reference frame of the IMU with the first reference frame of the object, the performing the calibration comprising: determining a gravitational vector based on a first portion of the IMU data; applying a first rotation to the IMU data to align the Z-axis of the second reference frame with the gravitational vector; determining a forward motion vector based on a second portion of the IMU data; and applying a second rotation to the IMU data to align the X-axis of the second reference frame with the forward motion vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.