Robust sensor timestamp management
US11025357B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2019 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Dec 19, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/2424
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems, methods and devices are provided to improve management and accuracy of timestamps associated with sensor-based data. An indication is received of a sensor event associated with data samples provided from a sensor having an output data rate. A respective timestamp is assigned to each of the data samples. Assigning the respective timestamp may include, responsive to a determination that the indicated event is an interrupt event, calculating an actual data sampling interval based at least in part on time intervals between previous sensor events and a on a quantity of the one or more data samples. Assigning the respective timestamp may alternatively include, responsive to a determination that the event type is a data flush event, assigning the respective timestamp based on an actual data sampling interval associated with one or more previous sensor events if the actual data sampling interval has been previously stored, and otherwise assigning the respective timestamp based at least in part on the output data rate. Correction logic and drift compensation may be applied to the assigned respective timestamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.