The Boeing Company

Paul Zack Thunemann

Robert William Grube

Raju Shankar Mattikalli

Thomas A Grandine

Stephen L Ray

Jeffrey David Poskin

James N Buttrick, Jr

Fei Cai

Troy Winfree

Jan Hendrik Vandenbrande

Michael Drumheller

Huseyin Erdim

Craig S Bosma

Gregory Mikel Anderson

Paul S Fussell

Thomas Allen Hogan-SCHMIDT

Natalie G Murray

Robert W Mattikalli

A method is provided for detecting regions of high curvature on a curve. The method comprises receiving a curve function and automatically arc length parameterizing the curve function. The local average curvature over the arc length parameterized curve function is automatically computed. One or more regions where the local average curvature turns at least a predetermined angle over a given interval are automatically indicated. The indicated regions are then output.

Detection of high curvature regions on curves

A modeling system is provided which is configured to retrieve from the non-volatile memory the 3D virtual model of an object; define a domain of a parametric surface; project feature curves in the 3D virtual model into the domain of the parametric surface to generate a mapping based on the 3D virtual model and including a plurality of parametric curves; divide the plurality of parametric curves into horizontal and vertical feature curves; extend each of the horizontal feature and vertical feature curves; construct a horizontal interpolant connecting the extended horizontal feature curves; construct a vertical interpolant connecting the extended vertical feature curves; fit the horizontal and vertical interpolants as coordinates of a map to a new parametric domain; and compose the inverse of the map to the new parametric domain with the parametric surface to create a new parametric surface containing the feature curves as isoparametric curves.

Modeling system for 3D virtual model

A modeling system is provided which retrieves from memory the 3D virtual model of an object; extract an outer surface of the 3D virtual model, the outer surface including a plurality of faces; identify feature curves in each of the plurality of faces of the outer surface; generate a parameterized surface from the identified feature curves; and output the feature curves and the parameterized surface. The system may generate a list of feature curve pairs that are adjacent to one another; obtain face pairs corresponding to the feature curve pairs; obtain and add a list of faces in the outer surface to a connectivity graph mapping points in 3D space to the feature curves; for each pair of connected faces, evaluate whether an angle difference between normals of the connected faces is greater than a threshold; and then extract a feature curve based on the pair of connected faces.

An apparatus, method and computer-readable storage medium are provided for laser ablation of a structural part. The method includes accessing a digital model of the structural part, and tiling the digital model into tiles that correspond to respective regions of the structural part. The method includes determining discrete tool paths of a machine tool for respective ones of the tiles for laser ablation of the respective regions of the structural part. And the method includes generating instructions for the machine tool to perform the laser ablation of the structural part according to the discrete tool paths.

Systems and methods for laser ablation of a surface

Systems and methods are disclosed for enabling users to write scripting code in a first scripting language, and then use a second scripting language to call language constructs written in that first scripting language. Functions, Class Definitions, Class Instances, Modules and other language constructs are treated as first-class objects that can be shared across the different scripting languages. The techniques disclosed herein are also applicable to domain-specific languages. As part of the methodology, a respective underlying representation of each of these object types is designed as an interface and then that interface is implemented in each scripting language. In addition, code is written in each scripting language implementation to allow the latter to use the interface to represent a Function, Class, or other language construct.

Sharing of first class objects across multiple interpreted programming languages

A software module apparatus for enabling a user to generate a virtual tripwire through a geographic area of interest using a plurality of sensors. The apparatus may make use of an input for allowing a user to input a digital elevation model (DEM) of the area of interest. An input responsive to a user controlled device may also be used for defining a swath of the area of interest, the swath representing a subregion laying over, or adjacent to, a border to be monitored. A display may be generated for illustrating computed locations of a plurality of independent sensors used to form the virtual tripwire through the swath of the area of interest.

System and method for forming optimized perimeter surveillance

A method for optimum sensor layout for detecting an intruder may include selecting candidate sensor locations within a representation of an area of regard. The method may also include determining a sub-region of detection for each sensor based on a preset probability of detection of the intruder traversing a sub-region associated with each sensor. The method may additionally include determining each pair of sensors with overlapping sub-regions of detection and determining a lowest probability of detection for any path between each pair of sensors with overlapping sub-regions of detection. The method may further include determining an optimum layout of sensor locations or sensors from candidate sensor locations based on a path of the lowest probability of detection for any path between each pair of sensors with overlapping sub-regions of detection.

Optimum sensor layout for detecting an intruder

An inter-language interface is created for an executable file written in a legacy language. The header associated with the legacy file is initially marked up language to generate a first marked header. The legacy file is then wrapped with a first wrapper based at least partially upon the first marked header to create a first wrapped file. Additionally, the first marked header is associated with type maps customized in accordance with the target language in order to generate a second marked header. An executable file may then be generated by wrapping the first wrapped file with a second wrapper so as to be executable in the target language, thereby creating a second wrapped file. Additionally, an interface layer is generated to associate functions in the legacy language with methods in the target language and to define the usage in the target language of the parameters in the legacy language.

Method, apparatus and computer program product for creating inter-language interface

A method for forming a virtual tripwire through a subregion of an area of interest. The method may involve performing a geometric analysis of terrain in the subregion, the geometric analysis determining a location for each one of a pre-designated plurality of candidate sensors that may potentially be used in forming the virtual tripwire. A viewshed for each candidate sensor is determined. Each viewshed represents a coverage region for its associated candidate sensor. A geometric beginning point and a geometric end point within the subregion are each defined for the virtual tripwire. The viewsheds are analyzed to determine a number of the candidate sensors required to form a path for the virtual tripwire from the beginning point to the end point.

This description provides tools for lazy evaluation of geometric definitions of objects within procedural programming environments. Computer-based methods provided by these tools may parse input program code that includes statements that are syntactically consistent with a procedural programming language. These statements may also include defined functions that are not syntactically consistent with the procedural programming language. The defined functions may be associated with a given function that is defined according to the procedural programming language. The given function may relate to a geometric design of an object. The methods may identify inputs and outputs to this given function, and may build a dependency graph that relates this given function to other functions, based on the inputs and/or outputs of the given function. The methods may delay evaluating the given function until a triggering event occurs, at which time the methods may evaluate the given function to produce the output.

Lazy evaluation of geometric definitions of objects within procedural programming environments

A method for determining a path of travel of an intruder traversing an area of regard (AOR) to a predefined point, where the path of travel has a minimum probability of detection relative to other potential paths of travel of the intruder. The method may comprise: providing three dimensional terrain data concerning the AOR; providing the locations of a plurality of detection sensors implemented in the AOR, with each detection sensor having a known field of view; providing a predetermined single scan detection probability for each of the detection sensors; generating a grid of points that is laid over the AOR; and using the foregoing information to determine a particular path of travel, defined by selected arcs connecting specific ones of the grid of points, of the intruder to the predefined point that represents a minimum probability of detection of the intruder.

System and method for detecting performance of a sensor field at all points within a geographic area of regard

Techniques for creating a finite element model are disclosed that include various processes including: superimposing a rectangular array of nodes and nodal-pointers onto a wire-frame geometry, and creating a set of geometric-elements using the rectangular array.

Growing community of inventors

Snoqualmie, WA, United States of America

Paul Zack Thunemann