PATENT CLAIM ANALYSIS

Application Number: 15758762
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-02
Patent Classification: ["345", "156000"]

Abstract:
A method and apparatus are provided for determining the orientation of an object relative to a moving or moveable platform. The object may for example be a helmet worn by a pilot of an aircraft in which orientation of the helmet relative the aircraft while in flight may usefully be known, in particular when determining the position of space-stabilised symbols being displayed in an associated helmet-mounted digital display system. The method and apparatus rely upon a combination or orientation rate data output by an inertial sensor arrangement associated with the object and orientation data output by a non-inertial tracker system associated with the object. Orientation data of the moveable platform is also used to reference the non-inertial tracker output to inertial space. A correction to the rate data output by the inertial sensor arrangement is determined using rate data derived from data output by the non-inertial tracker referenced to inertial space using orientation data of the moveable platform in inertial space. The corrected rate data are used to determine a predicted orientation for the object at some future time to take account of latency in the tracker process and in any user process relying upon the output of the method, for example a digital helmet-mounted display system displaying space-stabilised symbols.

Claim (Index 1):
A tracker system for determining orientation of an object relative to a moveable platform, comprising:\n an inertial sensor arrangement associated with the object and arranged to output rate data indicative of a rate of change in orientation of the object in inertial space; a non-inertial tracker system associated with the object, arranged to determine and to output orientation data indicative of orientation of the object relative to the moveable platform; an input for receiving orientation data indicative of orientation of the moveable platform in inertial space; a conversion component for receiving orientation data output by the non-inertial tracker system for converting a measure of orientation of the object relative to the moveable platform into a measure of orientation of the object in inertial space using a corresponding measure of orientation of the moveable platform in inertial space and for converting two or more successive measures of orientation of the object in inertial space into an estimate of the rate of change in orientation of the object in inertial space; a corrector component arranged to calculate corrections to rate data output by the inertial sensor arrangement, using a plurality of substantially synchronised combinations of rate data output by the inertial sensor arrangement and rate data output by the conversion component and to apply the calculated corrections to a current measure of rate data by the inertial sensor arrangement; and a predictor component arranged to calculate, by integrating the corrected rate data output by the corrector component and by forward prediction, an orientation of the object in inertial space at a predetermined prediction time relative to a time point of validity of the corrected rate data.

Metadata:
- Claim Count in Document: 59.0
- Percentile: 90.0
- Lexical Diversity: 2.47727
- Patent Class: 345.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10762810', '15767222', '15767561', '13013926', '15034624']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6474054013115644
- 35 USC 102 Novelty (BERT): 0.4805951291733046
- Combined Prediction Score: 0.6307243740977385
- Mean Citation Score: 207.492128
- Max Citation Score: 219.49348
- Similarity Product: 174.38246609066962

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test