1069results about "Profile tracing" patented technology

“Path-enhanced” multimedia (PEM) data may be viewed, modified, or interacted with according to user selected views which determine the manner in which at least a portion of the PEM data is displayed. The PEM data is stored in a data structure as a scrapbook object including first data object types corresponding to the PEM data and second object types corresponding to the different view types. The scrapbook object data structure lends itself to displaying portions of the PEM data according to selected views that correspond to a particular time and place or to a particular time ordered sequence of locations (i.e., a particular path segment) and / or can be enhanced with other multimedia content related to that time and place or to that path segment, thereby providing a more interesting and effective display of the “path-enhanced” recorded events. For example, the time and location of a particular point on the path may be used to locate and append other recorded sounds and images associated with that time and / or that location, to thereby provide an enhanced presentation of a trip or other path-oriented experience. Moreover, the data defining any such associated path may also be edited to thereby define a new or modified path.

This invention is directed to a 3-dimensional imaging lidar, which utilizes modest power kHz rate lasers, array detectors, photon-counting multi-channel timing receivers, and dual wedge optical scanners with transmitter point-ahead correction to provide contiguous high spatial resolution mapping of surface features including ground, water, man-made objects, vegetation and submerged surfaces from an aircraft or a spacecraft.

A system for acquiring, processing, storing, analyzing and reporting data relating to the condition of a road or other pavement surface (102) in real time. The system includes a digital camera (104) mounted on a vehicle and positioned relative to a pavement surface (102) so as to capture images of the pavement surface (102) while the camera (104) is moving relative to the surface (102). The system also includes an illumination assembly (100) to illuminate the region from which an image is taken and an interface between the digital camera (104) and at least one computer. The system also includes a processor in the computer for processing the images to detect and classify cracks and other pavement surface (102) features.

The invention relates to a soft hydrogel contact lens, especially a silicone hydrogel contact lens, which has a capability of delivering a hydrophobic comfort agent into the eye of a wearer. The hydrophobic comfort agent includes without limitation a monoglyceride, a diglyceride, a triglyceride, a glycolipid, a glyceroglycolipid, a sphingolipid, a sphingo-glycolipid, a phospholipid, a fatty acid, a fatty alcohol, a hydrocarbon having a C12-C28 chain in length, a mineral oil, a silicone oil, or a mixture thereof. It can be released from the soft hydrogel contact lens into the eye of a wearer when being worn so as to strengthen and stabilize the tear film lipid layer and alleviate the dryness of the eye.

Novel tools and techniques for monitoring railway track geometry. In one aspect, some such tools and techniques can determine a location of a platform along a railway, capture one or more images of the railway, and / or analyze the rail configuration at that point. In another aspect, some solutions might employ photogrammetric techniques to analyze the rail configuration and thereafter store data about the rail configuration, perhaps correlated with the location of the images, in a data store.

A computer-implemented method for generating an image-textured digital surface model (DSM) for a geographical area of interest including both buildings and terrain may include using a computer to generate a digital elevation model (DEM) of both the buildings and terrain for the geographical area of interest. The method may further include providing a collection of optical images including oblique optical images for the geographical area of interest including both buildings and terrain. The computer may also be used to selectively superimpose oblique optical images from the collection of optical images onto the DEM of both the buildings and terrain for the geographical area of interest and to thereby generate the image-textured DSM for the geographical area of interest including both buildings and terrain.

The present invention provides for a sensor array having at least one field-measuring sensor and at least one curvature-measuring sensor within a flexible substrate, the field-measuring sensors capable of providing orientation data of the flexible substrate relative to a field and the curvature-measuring sensors capable of providing relative orientation data within the substrate, for measuring dynamic and static shapes and vibration of geotechnical, structural and biological bodies.

A composition, apparatus and method for preparing a 3-D impression or replica of small objects. It is particularly aimed at the dental field and provides improved optical texture of an impression or replica of a small object to enable imaging by photogrammetry. The composition comprises a liquid curable polymer; macroparticles having a size greater than about 1 μm in diameter and microparticles present in a size range of less than about 1 μm such that the macroparticles and microparticles are present in a ratio in the range of between 5:1 and 15:1 (by volume); wherein the impression or replica formed from the composition has a surface particle distribution effective to allow imaging by photogrammetry.

The present invention provides for a sensor array having at least one field-measuring sensor and at least one curvature-measuring sensor within a flexible substrate, the field-measuring sensors capable of providing orientation data of the flexible substrate relative to a field and the curvature-measuring sensors capable of providing relative orientation data within the substrate, for measuring dynamic and static shapes and vibration of geotechnical, structural and biological bodies.

The invention relates to a method for monitoring and measuring a full section of a tunnel through three-dimensional laser, and belongs to the field of tunnel engineering construction monitoring. The method comprises the following steps of: arranging target points in a tunnel to be measured according to a requirement; determining whether to adopt one-station scan or multi-station scan according to the monitoring length of the tunnel; erecting an instrument at a proper position and scanning the full section of the tunnel; after the scan is finished, importing data into a computer; registering point cloud data acquired through the scan to generate a three-dimensional model by applying three-dimensional data processing software; and generating a comparison model by combining a previous three-dimensional model for the same tunnel at different time, and selecting a specific section and characteristic points to generate a variation analysis chart and a variation analysis sheet for a corresponding position. By the method, the full section of the tunnel is monitored in real time, the speed and accuracy of monitoring and measuring work are improved, manpower and material resources are saved, the speed and quality for monitoring and measuring the tunnel are improved, and reliable guarantee is provided for tunnel engineering construction.

The invention discloses a building surveying method utilizing a total station combined with a three-dimensional laser scanner. The method comprises the steps of: setting stations on the surrounding of a building, selecting one station as a benchmark station, and measuring the WGS-84 coordinate value of the benchmark station; arranging control points on the outer surface and the inner surface of the building, measuring and recording the coordinates of the points through the total station one by one, and scanning and measuring an obtained control point set [xi] through the three-dimensional laser scanner one by one to obtain building viewpoint cloud data, wherein a control point set [yi] is available; and realizing coarse registration on the viewpoint cloud through the [xi] and the [yi], converting the viewpoint cloud data into a WGS-84 standard coordinate system, and finally, performing global registration through the coarse registration result.

The invention discloses a tunnel body form deformation mobile monitoring system and a monitoring method thereof. The hardware comprises a laser scanner, a CCD camera, a speed meter, an inertial navigator, a central control unit and bar codes. The central operation control unit leads the hardware of each sensor to be synchronous, stores the data of each sensor and carries out the corresponding position and stature calculation so as to process the obtained point cloud data of the tunnel sections; the bar codes are distributed at the positions on the tunnel surface where the CCD camera can shoot and the storage position information of the bar codes is adopted as the position reference of moving carriers and sensors. The hardware of the tunnel body form deformation mobile monitoring system provided by the invention is helpful for quickly and dynamically collecting space data and for further carrying out the body form deformation analysis through three dimensional modeling and reconstruction of models so as to monitor the deformation process continuously.

The invention discloses a tunnel convergence monitoring method, which utilizes a measuring device to measure a tunnel section, inputs actually measured data to a computer so as to implement ellipse fitting processing, computes a fitted ellipse equation, determines the position of the section center, implements the elimination processing of parasitic error and random error of the measured data, computes the deformation degree of each measured point relative to the section center, and finally outputs a figure that is unfolded by taking the polar angle of the section center as horizontal axis to show the deformation degree of the tunnel section. The tunnel convergence monitoring method implements reasonable processing of the measured data of the tunnel section, can reflect the actual deformation situation of the tunnel section more veritably, and can be widely applied in the monitoring working of circular tunnel convergence.

A method for measuring and registering three-dimensional (3D) coordinates by measuring 3D coordinates with a 3D scanner in a first registration position, measuring two-dimensional (2D) coordinates with a 2D scanner while moving from the first registration position to a second registration position, measuring 3D coordinates with the 3D scanner at the second registration position, and determining a correspondence among targets in the first and second registration positions while moving between the second registration position and a third registration position.

The invention belongs to the technical field of tunnel detection of railway engineering systems and particularly relates to a method and a rail vehicle for full-section comprehensive detection of railway tunnels. The rail vehicle comprises a rail vehicle floor board, a cab and a carriage. Line-scan cameras are arranged on an arch frame which is arranged on the rail vehicle floor board, air-coupled shield antennas, and a GPS (global positioning system) mainframe, ground penetrating radar and infrared thermal imagers are arranged on the rail vehicle floor board. A GPS receiver is arranged at the top end of the cab, a laser scanner is arranged at the tail of the top plate of the carriage, and an industrial personal computer is arranged in the carriage. By multiple detection systems, one-time full-section detection of tunnel lining states and tunnel bottom damages can be realized, high detection accuracy, high efficiency, shortening of maintenance time and saving of maintenance cost are realized, influences on normal transportation of the railway tunnels are low, and loss caused by stopping of transportation is reduced.

A method of developing a flight path for precision flying over an area of interest, the method including, in an electronic processing device, determining coordinate and elevation data relating to an area of interest, using the coordinate and elevation data to determine a flight path including precision paths corresponding to precision flying trajectories and non-precision paths interconnecting at least some of the precision paths, and generating path data at least partially indicative of the flight path, the path data being useable in generating control signals for at least partially controlling operation of the aircraft, in use.

A lidar and digital camera system collect data and generate a three-dimensional image. A lidar generates a laser beam to form a lidar shot and to receive a reflected laser beam to provide range data. A digital camera includes an array of pixels to receive optical radiation and provide electro-optical data. An optical bench passes the laser beam, reflected laser beam, and optical radiation and is positioned to align each pixel to known positions within the lidar shot. Pixels are matched to form a lidar point-cloud which is used to generate an image.

The invention relates to a method for extracting a curb of a road using a laser range finder and a method for localizing of a mobile robot using curb information of a road. The method for extracting the curb of the road using the laser range finder includes extracting a road surface and line segments from scan data of the laser range finder, extracting a plurality of curb candidate line segments among the line segments on the basis of an angle between the road surface and the line segment, extracting a plurality of curb candidates having a plurality of curb properties, wherein each of the plurality of curb candidates is generated by combining the couple of the curb candidate line segments, and applying the plurality of the curb candidates to a Kernel Fisher Discriminant Analysis to extract a final curb.

There is provided a vision system and a method for scanning a traveling surface such a road to detect surface defects thereof such as cracks. The vision system, which is mountable on a vehicle, is provided with a linear imaging system for imaging successive adjacent transversal linear portions of the traveling surface as the vehicle advances. The vision system is also provided with laser line projecting means angularly projecting a laser line onto the transversal linear portion of the traveling surface to be imaged in a substantially coplanar relationship with the linear imaging system. The present vision system is particularly devised to be immune to surrounding light conditions variations to provide optimum cracks image contrast for both transverse and longitudinal cracks.

Acoustic transducers configured with integrated electronics technology are adapted to digitize signal data close to the transducer. The transducers are packaged with a reduced number of elements and sealed for exposure to harsh environments, without oil compensation. A transducer assembly includes a frame, an acoustic transducer element disposed on the frame, and an electronics module disposed on the frame and linked to the acoustic transducer element. The pressure and temperature tolerant electronics module is adapted to process a signal associated with the transducer element.

A soil monitoring system is provided that includes a sensing shank, and a first sensor coupled to a leading edge of the sensing shank. The first sensor is configured to output first signals indicative of a pressure exerted on the first sensor by soil as the sensing shank is driven through the soil along a direction of travel. The soil monitoring system also includes a frame forming a channel oriented in a substantially vertical direction relative to a surface of the soil, and a carrier coupled to the sensing shank and disposed within the channel. The soil monitoring system further includes an actuator extending between the frame and the carrier. The actuator is configured to linearly drive the carrier in a reciprocating motion to vary a penetration depth of the sensing shank within the soil.

The invention discloses a gauge for three directional deformation of a ground fissure. The gauge comprises two vertical uprights which are respectively fixed at the left side and the right side of theground fissure, a horizontal tension displacement testing device which is fixed between the two vertical uprights, a vertical displacement testing device and a horizontal shear displacement testing device which are arranged on one of the vertical uprights, a data analysis system and an alarm unit controlled by the data analysis system; the vertical displacement testing device comprises a verticalslide block and a vertical line displacement sensor; the horizontal tension displacement testing device comprises a horizontal support slide shaft, a horizontal support bar, a horizontal slide blockand a horizontal line displacement sensor; the horizontal shear displacement testing device is an angular displacement sensor; and the horizontal line displacement sensor, the vertical line displacement sensor and the angular displacement sensor are connected with the data analysis system. The gauge has the advantages of convenient installation and debugging, convenient use and operation, high testing precision and good testing effect, and can synchronously detect absolute values of three directional deformations at the same point of the ground fissure.

A method for measuring and registering 3D coordinates has a 3D scanner measure a first collection of 3D coordinates of points from a first registration position. A 2D scanner collects horizontal 2D scan sets as 3D measuring device moves from first to second registration positions. A processor determines first and second translation values and a first rotation value based on collected 2D scan sets. 3D scanner measures a second collection of 3D coordinates of points from second registration position. Processor adjusts second collection of points relative to first collection of points based at least in part on first and second translation values and first rotation value. Processor identifies a correspondence among registration targets in first and second collection of 3D coordinates, and uses this correspondence to further adjust the relative position and orientation of first and second collection of 3D coordinates.

The invention discloses a construction method for a digital elevation model for discrete expression of landform on the earth surface. The construction method comprises the following steps of: extracting elevation values of sampling points from the original data of the earth surface and performing spatial discretization on the elevation values to generate a plurality of landform curved surface grid points of the known elevation values of the sampling points; solving the elevation values of the landform curved surface grid points of non-sampling points; calculating first fundamental quantity and second fundamental quantity of each landform curved surface grid point according to the elevation values of all landform curved surface grid points and establishing a landform curved surface equation set by using a Gauss equation and elevation sampling points; solving the landform curved surface equation set by using a Gauss-Seidel iterative algorithm, wherein a simulation result of the digital elevation model is obtained after each iteration is finished; judging whether the simulation result of the digital elevation model meets the accuracy requirement; if the simulation result meets the requirement, stopping the iterative computation and outputting a group of ordered values to express the digital elevation model of a ground elevation entity in an array form, wherein the digital elevation model is used for the discrete expression of the landform on the earth surface; and if the simulation result does not meet the requirement, repeating the iterative computation.

The invention provides an underwater topographic mapping and correcting method adopting an AUV (autonomous underwater vehicle) equipped with multi-beam sonar. The method comprises steps as follows: multi-beam sonar and a depth gauge are started to collect data, and each ping is corrected according to sound velocity information collected by a sound velocity section plotter; an accurate relative position between two moments is determined with a topographic matching method, so that a final navigation error of an inertial navigation system is obtained; the inertial navigation system is simplified into a spring model, a relationship between each node error and an actual final navigation error is calculated according to a stiffness coefficient formula of a spring; weight of each time node relative to the final error is determined with a topography continuity method; a final moment error is distributed to each time node. The method is independent of GPS (global position system) information in a submarine topographical map establishing process, the multi-beam sonar can be carried by the AUV for completing submarine topographic mapping of a deeper sea area, the consistency of an established map is better, the time node error is small, and the submarine topographical map can be taken as a priori topography map to be applied to the underwater topographic matching navigation.