초록 ▼

The sensor array is positioned at a vantage point to detect and calibrate its reference frame to the external reference frame demarcated by light-emitting reference indicia. The sensor array encompasses a wide view calibration field and provides data indicating the spatial position of light sources

The sensor array is positioned at a vantage point to detect and calibrate its reference frame to the external reference frame demarcated by light-emitting reference indicia. The sensor array encompasses a wide view calibration field and provides data indicating the spatial position of light sources placed within the calibration field. A tetrahedron framework with light-emitting diodes at the vertices serves as a portable reference target that is placed in front of the feature sensor to be calibrated. The sensor array reads and calibrates the position of the light-emitting diodes at the vertices while the structured light of the feature sensor is projected onto the framework of the reference target. The structured light intersects with and reflects from the reference target, providing the feature sensor with positional and orientation data. These data are correlated to map the coordinate system of the feature sensor to the coordinate system of the external reference frame. A computer-generated virtual image display compares desired and actual sensor positions through a real time feedback system allowing the user to properly position the feature sensor.

대표청구항 ▼

[ What is claimed is:] [1.] A method for positioning a feature sensor on a fixed structure with respect to an external reference frame, comprising the steps of:(a) using a calibration sensor array, said calibration sensor array having a fixed position with respect to said external reference frame ac

[ What is claimed is:] [1.] A method for positioning a feature sensor on a fixed structure with respect to an external reference frame, comprising the steps of:(a) using a calibration sensor array, said calibration sensor array having a fixed position with respect to said external reference frame according to a first relationship;(b) determining a second relationship between a reference target and said external reference frame through use of said calibration sensor array and said reference target, said second relationship defining the position of said reference target with respect to said external reference frame, said calibration sensor array having a plurality of sensors secured at a fixed distance from each other for establishing the field of view of said calibration sensor array;(c) determining a third relationship between said reference target and said feature sensor through use of said feature sensor and said reference target, said third relationship defining the position of said feature sensor with respect to the position of said reference target; and(d) approximately positioning said feature sensor with respect to said external reference frame based upon positioning information derived from said first, second, and third relationships.