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公开(公告)号：EP2513701B1
公开(公告)日：2015-05-06
申请号：EP10803130.3
申请日：2010-12-17
申请人： BAE Systems PLC
CPC分类号： G02B27/017 , G01S5/163 , G02B2027/0187 , G06F3/012
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公开(公告)号：EP2513701A1
公开(公告)日：2012-10-24
申请号：EP10803130.3
申请日：2010-12-17
申请人： BAE Systems Plc.
CPC分类号： G02B27/017 , G01S5/163 , G02B2027/0187 , G06F3/012
摘要： A method and system of aligning a helmet mounted display mounted to a helmet is disclosed. The method comprises the steps of; - aligning a first helmet mounted display guide symbol with a reference direction; - selecting the alignment of the first helmet mounted display guide symbol with the reference direction; - aligning a first stabilised guide symbol, starting at the position of the aligned first symbol, with a reference direction, the first stabilised symbol being stabilised to reduce the movement of the stabilised symbol with respect to the reference direction in response to movements of the head of the user; - selecting the alignment of the first stabilised guide symbol with the reference direction; - aligning a second helmet mounted display guide symbol with the reference direction; - selecting the alignment of the second helmet mounted display guide symbol with the reference direction; - aligning a second stabilised guide symbol, starting at the position of the aligned second symbol, with a reference direction, the second stabilised symbol being stabilised to reduce the movement of the stabilised symbol with respect to the reference direction in response to movements of the head of the user; - selecting the alignment of the second stabilised display guide symbol with the reference direction; - determining a relative position and orientation between the helmet and the display mounted to the helmet according to the positions and orientations of the helmet at said alignments.
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公开(公告)号：EP3347676A1
公开(公告)日：2018-07-18
申请号：EP16766071.1
申请日：2016-09-12
申请人： BAE Systems PLC
摘要： The orientation of an object is determined by a tracker system, which has a sensor arrangement 100 associated with the object, arranged to output rate data providing a cyclic indication of a rate of change in orientation of the object. It also has a predictor component 55 arranged to receive rate data output by the sensor arrangement and to determine from the received rate data an orientation of the object at a predetermined prediction time period ahead of a time point of validity of the received rate data. A buffeting measurement component 130 is arranged to receive rate data output by the sensor arrangement and to determine therefrom a measure of buffeting severity upon the object. A buffeting compensation component 135 is arranged to adjust the operation of the predictor component to compensate for a determined measure of buffeting severity by the buffeting measurement component. The object may be a helmet worn by a pilot of an aircraft and a 2 stage filtering process may be used to calculate buffeting severity.
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公开(公告)号：EP3347679A1
公开(公告)日：2018-07-18
申请号：EP16766060.4
申请日：2016-09-09
申请人： BAE Systems PLC
摘要： A method is provided for determining corrections to rate data output by inertial sensors of a type typically used in tracking changes in orientation of an object. The present invention also extends to a tracker system incorporating the correction functionality of the present invention. The method makes use of rate data output by inertial sensors associated with the object being tracked and rate data derived from measures of orientation supplied by a non-inertial tracker system also associated with the object being tracked and comprises determining from those rate data corrections for errors due to misalignment in rate data output by inertial sensors, by calculating a mapping between vectors linking points in inertial sensor rate space represented by a sample set of received rate data from the inertial sensors and vectors linking points in a derived object orientation rate space represented by a corresponding and synchronised sample set of derived rate data. Corrections for inertial sensor bias may be determined separately from corrections for misalignment-related errors, after correction of inertial sensor rate data for misalignment-related errors by determining the vector translation between a point represented by corrected inertial sensor rate data in the derived object orientation rate space and the point in the same rate space represented by derived rate data synchronised therewith.
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公开(公告)号：EP3347675A1
公开(公告)日：2018-07-18
申请号：EP16766062.0
申请日：2016-09-09
申请人： BAE Systems PLC
IPC分类号： G01C21/16
CPC分类号： G01C21/165
摘要： Determining the orientation of an object relative to a moving or moveable platform involves a combination of orientation rate data output by an inertial sensor arrangement such as gyroscopes 5 associated with the object and orientation data output by a non-inertial tracker system 10 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 fromdata 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 a predetermined prediction time relative to a time point of validity of the corrected rate data 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.
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公开(公告)号：EP2810118A1
公开(公告)日：2014-12-10
申请号：EP12805523.3
申请日：2012-12-05
申请人： BAE Systems PLC
CPC分类号： G02B27/017 , G01S5/163 , G02B27/0189 , G02B2027/014 , G02B2027/0198 , G06F3/012 , G06F3/013
摘要： A user (18) views a reference symbol (36) along a line of sight (28) intersected by an image intensifier (22), arranged to present an intensified image of a forward scene (26) to the eye (24) of the user (18), and an image display (14), arranged to display an image to the eye (24) of the user (18) overlaid on the intensified image. The user indicates alignment of first and alternate symbols generated at known positions on the image display (14) with the reference symbol (36) and the position of a helmet (16) carrying the image display (14) is determined by a helmet tracking system (30) for each alignment. A line of sight can be determined for each symbol alignment given the helmet (16) position and known location of the first and alternate symbols. These lines of sight can be used to determine the magnification factor of the forward scene (26) induced by the image intensifier (20). Accordingly, symbology generated and displayed on the image display (14) can be compensated for relative to the magnification factor.
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