Abstract:
Methods are described for controlling orientation of an aim point axis of a video camera having an instrument coordinate system to track a point of interest on a movable target object and calculating positions of the point of interest in a local coordinate system in which the target object is moving. The methods include measuring pan and tilt angles of the aim point axis and distance substantially along the aim point axis and calculating a calibration matrix which transforms a position defined in the instrument coordinate system to a position defined in the local coordinate system. A system is described including an instrument and at least one computer, wherein the instrument includes a video camera and a range finder, and wherein the video camera includes an aim point axis having an adjustable orientation. In one example, the target object is adapted to move on and inspect an airplane surface.
Abstract:
A local positioning system which includes a video camera, a computer communicating with the video camera and a target object sighted by the video camera and having a target object coordinate system. The computer is adapted to define a relative position and orientation of the video camera with respect to the target object, determine a position and orientation of the video camera in the target object coordinate system, and determine the position of a point of interest in the target object coordinate system. The system can also be used to aim the camera at a previously recorded point of interest on the target object. Contact with, or close proximity to, the target object is not required. A local positioning method is also disclosed.
Abstract:
Position determining systems and methods are provided. A particular portable device includes a calibration component to communicate with a local positioning system to determine an initial position and orientation of the portable device within a local coordinate system associated with a target structure. The portable device also includes at least one movement sensor to detect movement of the portable device. The portable device further includes a processor to determine a measured position and orientation of the portable device based on the initial position and orientation of the portable device within the local coordinate system and based on the detected movement of the portable device.
Abstract:
A system and method for determining the position and orientation of a handheld device relative to a known object is presented. The system comprises a handheld device having an inertial measurement unit and a sighting device, such as a laser pointer, that are used to determine the position of the handheld device relative to a target object, such as a structure, aircraft, or vehicle. The method comprises calibrating a handheld device to find the current location of the handheld device relative to a target object, tracking the movement of the handheld device using an inertial measurement unit, and presenting an updated position of the handheld device relative to a target object.
Abstract:
A system comprising a multi-functional boom subsystem integrated with a holonomic-motion boom base platform. The boom base platform may comprise: Mecanum wheels with independently controlled motors; a pair of sub-platforms coupled by a roll-axis pivot to maintain four-wheel contact with the ground surface; and twist reduction mechanisms to minimize any yaw-axis twisting torque exerted on the roll-axis pivot. A computer with motion control software may be embedded on the boom base platform. The motion control function can be integrated with a real-time tracking system. The motion control computer may have multiple platform motion control modes: (1) a path following mode in which the boom base platform matches the motion path of the surface crawler (i.e., integration with crawler control); (2) a reactive mode in which the boom base platform moves based on the pan and tilt angles of the boom arm; and (3) a collision avoidance mode using sensors distributed around the perimeter of the boom base platform to detect obstacles
Abstract:
A system and methods for location authentication are presented. A subset of demodulated server received navigation signals are selected synchronized to client bit frames to provide synchronized server bit frames. A function of the synchronized server bit frames is computed to provide a server signature set. A client signature set and the server signature set are compared to provide a comparison result, and a location of a client device is authenticated based on the comparison result.
Abstract:
Methods and systems are provided for positioning a remote sensor within a target object. An articulated robotic system is coupled to the remote sensor. A positioning system determines a position of the target object to be inspected and determines a first position of the remote sensor. A control system calibrates a virtual representation of the target object with respect to the position of the target object, and tracks movement of the remote sensor relative to the target object.
Abstract:
A self-contained, holonomic motion tracking solution for supplementing the acquisition of inspection information on the surface of a structure, thereby enabling the real-time production of two-dimensional images from hand-held and automated scanning by holonomic-motion of non-destructive inspection (NDI) sensor units (e.g., NDI probes). The systems and methods disclosed enable precise tracking of the position and orientation of a holonomic-motion NDI sensor unit (hand-held or automated) and conversion of the acquired tracking data into encoder pulse signals for processing by a NDI scanning system.
Abstract:
A system and method that allow inspection of hollow structures made of composite material, such as an integrally stiffened wing box of an aircraft. A wing box comprises top and bottom skins connected by a plurality of spaced spars. The system employs a plurality of scanners for inspecting different portions of each spar. The system uses dynamically controlled magnetic coupling to connect an external drive tractor to computer-controlled scanners that carry respective sensors, e.g., linear ultrasonic transducer arrays. A system operator can control the various components by means of a graphical user interface comprising multiple interaction regions that represent the individual scanner motion paths and are associated with respective motion script files.
Abstract:
A method and apparatus comprising an energy source, a position system, and a movement system. The energy source is configured to generate a beam of energy directed at an area on a target for a vehicle. The position system is configured to identify a first position of the area on the target at which the beam of energy is directed. The movement system is configured to move the vehicle in a manner that reduces a difference between the first position of the area on the target at which the beam of energy is directed and a reference position on the target.