초록 ▼

An improved helmet line of sight measuring system for determining the spatial location of a helmet and the line of sight of an observer wearing the helmet, both relative to a coordinate reference frame. A plurality of assemblies of light sources are distributed on the helmet each comprising three li

An improved helmet line of sight measuring system for determining the spatial location of a helmet and the line of sight of an observer wearing the helmet, both relative to a coordinate reference frame. A plurality of assemblies of light sources are distributed on the helmet each comprising three light sources positioned at the vertices of a triangle and a fourth light source outside the plane of the triangle. Optical means fixed in space relative to the coordinate reference frame image the light emitted by the light sources in at least one of the assemblies onto an area image sensor, thereby producing two-dimensional image data of the light sources on the plane of the image sensor. Computing means coupled to the area image sensor is thereby able to determine the spatial coordinates of the helmet from the image data.

대표청구항 ▼

A helmet line of sight measuring system for determining the spatial location of a helmet and the line of sight of an observer wearing said helmet, both relative to a coordinate reference frame, said system comprising: a plurality of assemblies of light sources distributed on said helmet, each assemb

A helmet line of sight measuring system for determining the spatial location of a helmet and the line of sight of an observer wearing said helmet, both relative to a coordinate reference frame, said system comprising: a plurality of assemblies of light sources distributed on said helmet, each assembly comprising three light sources positioned at the vertices of a triangle and a fourth light source outside the plane of said triangle, there being a predetermined geometry associated with said light sources; optical means fixed in space relative to said coordinate reference frame for imaging the light emitting by the light sources in at least one of said assemblies onto an area image sensor located a predetermined distance from said optical means producing two-dimensional image data of said light sources on said area image sensor; and computing means coupled to said area image sensor and responsive to said predetermined geometry and said predetermined distance for determining the spatial coordinates of said helment from said image data.