Patent · US Active

Unit and method for improving positioning accuracy

US9921065B2 · kind B2 · utility

3Cited by

3References

20Claims

0Family size

Assignee

VOLVO CAR CORPORATION · SE

Inventors

Mattias Erik Brannstrom · Gothenburg, SE
Joakim Lin Sorstedt · Gothenburg, SE
Peter Karlsson · Lund, SE

Key dates

Filing date	Jun 13, 2016
Grant date	Mar 20, 2018
Priority date	—
Expiry date	Jun 13, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG05D1/0278
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A unit for improving positioning accuracy of an autonomous vehicle driving on a road includes a first computation unit configured to compute a first position of the vehicle at a time T1 using data from at least an inertial measurement unit (IMU); a second computation unit configured to compute a second position of the vehicle at the time T1 using data from at least one external sensor and a map; a comparison unit configured to compute a position difference between the computed first and second positions; a correction unit configured to correct an error parameter of the IMU, wherein the error parameter is used for correcting a third position of the vehicle computed by the first computation unit at a time T2 with the computed position difference at time T1, if the second computation unit is unable to compute a fourth position of the vehicle at the time T2.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.