Strapdown heading sensors and systems, and methods of calibrating and compensating the same
US10823567B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2019 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Jan 11, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/188
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods of calibrating strapdown heading sensors and strapdown heading sensors are provided. The methods include compensating raw sensor data generated by sensors of an uncalibrated strapdown heading sensor to compensate for errors in an instrument frame of the strapdown heading sensor. The strapdown heading sensor is put in a target apparatus and output data is compensated to compensate for errors in an apparatus frame relative to the instrument frame. The strapdown heading sensors include a housing and a compass module having a first sensor configured to detect a magnetic field of the Earth and a second sensor configured to detect a gravitational force of the Earth. The first sensor and the second sensor are each passively isolated from bending and/or flexing of the housing such that an alignment between the first sensor and the second sensor is not disturbed due to the bending and/or flexing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.