Dual harmonization method and system for a head-worn display system for making the display of piloting information of an aircraft conform with the outside real world

US10761326B2 · kind B2 · utility

Assignee

• THALES · FR

Inventors

• Bruno Aymeric · Le Haillan, FR
• Siegfried Rouzes · Le Haillan, FR

Key dates

• Filing date: Dec 7, 2018
• Grant date: Sep 1, 2020
• Expiry date: Jan 26, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0198
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A dual harmonization method for a head-worn display system for making the display of piloting information of an aircraft conform with the outside real world includes a step of acquisition of N measurements {circumflex over (K)}l of head postures by a series of different sightings Vi, each of which aligns a sighting pattern, situated at a different fixed position Pi on the display D0 with a sighting vector that is a function of the position Pi, then a step of computation of the matrix of relative orientation M01 between the display D0 in a tilted position of engagement in the field of view and the tracking first element D1 as the right matrix {circumflex over (D)} that is the solution of the dual harmonization system of equations Ĝ·{circumflex over (K)}i·{circumflex over (D)}·{right arrow over (x)}i={right arrow over (y)}0 for i varying from 1 to N, the vector {right arrow over (y0)} denoting the vector in the inertial reference frame of the platform corresponding to the target point targeted in the outside real world and being unknown; and the left matrix Ĝ being the matrix M23 of relative orientation between the fixed second element D2 and the attitude inertial device D3, which is…