45results about How to "Spatial location is accurate" patented technology

The invention discloses an automatic three-dimensional measuring method for a high-precision blade of an aviation engine. The automatic three-dimensional measuring method comprises the following steps of (1) rectification: performing rectification on a design coordinate system of a design model and a measurement coordinate system of a workpiece entity; (2) path planning: planning a motion path of a distance sensor in a measuring process by using a data processing device so that a measured region of the workpiece entity is in a measurement range of the distance sensor; and (3) automatic measurement: sampling a front region and a reverse region of the workpiece entity by using the distance sensor to obtain a complete surface profile of the workpiece entity. The distance sensor serves as a measuring terminal, and position information of surface points of the measured region can be acquired; and moreover, by a three-axis motion mechanism, measurement on different regions of the workpiece entity can be realized, measured cloud data of points of density of a local range are automatically fused to the same coordinate system, and complete precise measurement on a workpiece and quality testing operation on the workpiece entity are realized.

The invention provides an aerial camera Cassegrain primary and secondary mirror supporting structure, belongs to the technical field of optical engineering, and aims at solving problems in the prior art that the supporting structure is complex, the processing and adjusting cycle is long and cost is high. A primary mirror base is fixedly connected with one end of a mirror cone. A primary mirror gasket is arranged between the primary mirror base and the mirror cone. A secondary mirror base is fixedly connected with a connecting frame. An axial gasket and an angular gasket are arranged between the secondary mirror base and the connecting frame. The connecting frame is fixedly connected with the other end of the mirror cone. A primary mirror and a secondary mirror are respectively fixed on the primary mirror base and the secondary mirror base. Flexible hinges are directly processed on the primary mirror base and flexible slots are processed on the secondary mirror base so that stress transmitted to the surface of a reflecting mirror in change of external environment temperature and the assembling process can be reduced and optical surface figure accuracy can be enhanced; and axial distance and relative angle of the primary mirror and the secondary mirror are adjustable so that the primary mirror and the secondary mirror are ensured to possess correct spatial position, and the assembling process is simple and short in the cycle.

A method and device for monitoring an electrical network, including: a mechanism detecting electrical signals and additional signals produced in the electrical network, the additional signals being of a different physical nature to the electrical signals; a mechanism for processing the electrical signals to define a first time reference representing a detection time of the electrical signals emitted upon a fault event arising in the electrical network; a mechanism processing the additional signals to define a second time reference representing a detection time of the additional signals emitted upon the fault event arising in the electrical network; and a processor spatially locating the fault event in the electrical network according to the first and second time references.

An apparatus and method for detecting, locating, and analyzing chemical compounds located within a test subject using subatomic particle activation. In a first embodiment, an excitation source excites a target to simultaneously produce beams each consisting of certain subatomic species, for example fast neutrons and alpha particles. The test subject (and chemical compounds contained therein) is irradiated by the fast neutrons, thereby stimulating the emission of prompt gamma rays. Gamma and alpha detectors are positioned relative to the test subject and target(s) so as to detect the emitted prompt gamma rays and alpha particles in substantial coincidence, and the known physical relationship between the beams is used to spatially locate the activated chemical compound. Energy spectra derived from the gamma detectors are filtered to eliminate all non-relevant spectral artifacts, thereby 1) permitting the creation of a plurality of parallel coincidence channels; 2) reducing the subsequent signal processing required; and 3) increasing the overall accuracy and efficiency of the chemical compound identification and analysis processes. In a second embodiment, thermal neutron-induced gamma emissions are detected and analyzed in conjunction with the fast neutron-induced gammas to provide a warning signal of the possible presence of certain types of contraband. A multi-beam/multi-target embodiment is also disclosed for more accurate spatial location. A method for calibrating and evaluating the efficacy of the system under varying test parameters is further disclosed.

A heliostat calibration device comprises a support frame (1), an image acquisition unit (2) and an image processing unit. The image acquisition unit (2) picks up image information from a heliostat (3) surface directly, and transmits the image information to the image processing unit. The image processing unit obtains the spatial location information of the heliostat (3) surface in accordance with the image information and the spatial location information of the image acquisition unit (2) and of the support frame (1). The image processing unit determines the actual rotation center of the heliostat surface by obtaining several sets of spatial location information of the heliostat surface, and completes calibration of the heliostat (3). The heliostat calibration device acquires image information from the heliostat (3) surface with a high degree of accuracy by means of direct image acquisition by the image acquisition unit. The calibration device is equipped with several movement modes in order to calibrate a great number of heliostats (3) with high efficiency. A method for obtaining the actual rotation center of the heliostat (3) utilizes the heliostat calibration device.

The invention discloses a method for detecting the space position state of each circular member bar of a jacket in a three-dimensional coordinate system. The method comprises the following steps of: 1, arranging the jacket and a member bar to be detected in the same three-dimensional coordinate system and projecting the three-dimensional coordinates of a surface point of an acquisition member bar onto the circumference of a cross section formed by measuring points; 2, performing primary angular rotation and secondary angular rotation on a point to be detected; 3, processing converted coordinate data by adopting a minimum square method under the condition that the theoretical radius of the member bar to be tested is given and calculating an error in point measurement between an optimum circle center coordinate and a circle center coordinate of the member bar to be detected; 4, picking a point with a larger error out and repeating the step 3; 5, performing reverse three-dimensional conversion to an original coordinate system; and 6, connecting the optimum circular center coordinates of the member bar to be detected, obtained by calculating, into a linear jacket structural figure, evaluating the error of each member bar of the jacket and adjusting the member bar. By adopting the method, the three-dimensional coordinate of the circle center of each circular member bar of the jacket can be obtained quickly and accurately, the error value of the circle center coordinate is analyzed, and the working efficiency is improved.

The invention provides a simple flexible positioning method for a continuous external surface of a workpiece, which comprises the following steps: external surface elements-positioning points or lines are selected on the continuous positioning external surface of the workpiece, and the shape of the workpiece is determined and positioned discontinuously by the multiple points or multiple lines; positioning pins which are in point contact or line contact with the external surface of the workpiece are installed on the selected positioning points or lines, and shape positioning pins (7) are distributed along the shape of the workpiece; the positioning pins are positioned by tangent points or tangent lines which are in contact with the shape of the workpiece; the shape positioning pins (7) areinstalled in a step bushing (6); the shape positioning pins (7) are assembled at one end of the step bushing (6), and a target ball (8) of a laser tracking instrument is arranged at the other end of the step bushing (6); laser beams are received by the target ball (8); and the laser tracking instrument emits and receives the laser beams fedback by the target ball (8) and judges the space positionof the positioning points by a computer. The method for flexibly positioning the shape of the workpiece provided by the invention has high manufacturing accuracy, small technology difficulty, high work efficiency and short manufacturing cycle.

The invention relates to a binocular infrared vision portable gesture-controlled projection system and a method. The binocular infrared vision portable gesture-controlled projection system comprises cameras, a double-camera control module, an LED (Light Emitting Diode) infrared light-compensating lamp, a data storage module, an image data analysis module, a central processing unit, a software operating module, a display control module, a projection module, a power supply and a power supply control module. The method comprises the steps of initializing a system coordinate; in the condition that visible light filters are arranged in front of the double cameras and the LED infrared light-compensating lamp, performing the following steps: the projection module is controlled by the display control module to project a control menu provided by the software operating module on a plane, synchronously, the double cameras are controlled by the double-camera control module to capture gesture movement images within the range of the projection plane in real time, image data are stored in the data storage module, and corresponding gesture control is performed according to the gesture movement images; reading the image data from the data storage module and analyzing by the image data analysis module. According to the binocular infrared vision portable gesture-controlled projection system and the method, the projection use interactivity is increased, peripheral devices do not need to be added by a user, and system software can be controlled to operate only by directly clicking the projected menu interface.

The invention discloses a mounting method for templates of a box-type steel skeleton inclined column, which comprises the following steps that 1) a steel reinforcement cage of a steel skeleton is bound by steel reinforcements; 2) a column foot template and a column body template of the inclined column are subjected to lofting; a variable cross-section wire is put at the steel skeleton; 3) a template support is welded at a variable cross section; 4) templates are assembled and reinforced; double-groove steel is adopted as template reinforcing main ribs; and 5) a supporting frame is erected by the templates. The mounting method for the templates of the box-type steel skeleton inclined column has the benefits that 1) as the double-groove steel is adopted as the template reinforcing main ribs, welding of an anchor bolt on an inclined column body, subsequent cutoff and surface repair of concrete are avoided effectively; and 2) the steel reinforcement support is welded at the variable cross section of the column for bearing the pressure of the column body template, the probability of instability of the column foot template due to the pressure is reduced, and the probability of repeated position adjusting processes of the column foot template and the column body template is avoided.

The invention discloses a ranging method based on binocular stereo. The method comprises the following steps: obtaining binocular image data after preprocessing; Obtaining binocular image data of a target region in the preprocessed binocular image data by a depth learning algorithm; Stereo matching method is used to calculate the spatial position of the target region. The scheme of the invention can obtain a more accurate spatial position of a target area by simple calculation.

The invention discloses a multi-degree-of-freedom aided ship model starting and braking device and belongs to the ship and marine engineering experimental equipment technical field. The device comprises fixed structures, longitudinal adjustment structures, vertical adjustment structures and a truss structure; the fixed structures are installed on the deck of a test ship model; each vertical adjustment structure is integrally connected with one corresponding fixed structure; each vertical adjustment structure is correspondingly welded on the upper side and lower side of the corresponding fixedstructure; each longitudinal adjustment structure is installed on adjacent vertical adjustment structures at the same side of the deck; the longitudinal adjustment structures at two sides of the deckare provided with fixed trusses; a slideable truss is connected between the two fixed trusses; and various components are fixed through bolts. The multi-degree-of-freedom aided ship model starting andbraking device is of structural simplicity; and the relative positions of the components of the device can be flexibly adjusted. With the multi-degree-of-freedom aided ship model starting and brakingdevice adopted, multi-degree-of-freedom force supporting points can be provided for the starting and braking of ship models with different shapes; and damage to valuable test and measurement equipment caused by larger load generated during the starting and braking of the ship models can be avoided.

The invention provides a power distribution network planning graph visibility optimization method. The power distribution network planning graph visibility optimization method comprises the followingsteps of S1, performing power distribution network planning graph global visibility optimization based on a space-limited FR algorithm; S2, carrying out power distribution network planning graph densearea identification based on CD-TIN; S3, carrying out FR algorithm parameter optimization based on a grid method; and S4, on the basis of the optimal parameter FR optimization result, carrying out power distribution network planning graph local dense region visibility optimization based on an FE algorithm. According to the method, global-to-local distribution network planning graph node layout optimization is realized, the included angle between homologous dense lines is increased, and the optimized distribution network planning graph can meet the requirements of clear topological relation between the lines and distribution facilities and accurate spatial positions of the distribution facilities.

The invention discloses a video scene different place reconstruction method. The method is characterized by placing two field angle calibration rulers in an original video scene and making vertical marker lines of the two field angle calibration rulers in a monitoring frame be located at left and right boundaries of the monitoring frame, and measuring a spatial position relationship parameter of the two field angle calibration rulers and a monitoring camera in the original video scene; and placing the field angle calibration rulers and a reconstruction camera based on the parameter obtained from the original scene in a different place, comparing static images saved in the original video scene with videos captured by the reconstructed camera, adjusting a reconstruction camera parameter andacquiring a reconstructed video scene that is exactly the same as a field angle of the original video scene. By using the method, the video scene that is exactly the same as the field angle of the original video scene can be constructed in the different place, a simulation video can be recorded in the different place which is far away from the original video scene, a three-dimensional dynamic characteristic curve of a criminal suspect is made and a personal identification method requirement based on a dynamic characteristic is satisfied.

The invention discloses an SAR image ship target detection method, which relates to the technical field of SAR image target detection, and comprises the following steps of: (1) selecting a threshold value according to the occurrence frequency of a pixel gray value to screen clutter pixels, calculating a kernel density value of each pixel point in an SAR image based on a selected sliding window, and converting into spatial values corresponding to the pixel points through normalization; (2) performing resolution reduction processing on the image through a sampling theorem; and (3) realizing self-adaptive CFAR detection based on G0 distribution in the resolution-reduced image subjected to pixel screening. According to the method, the image is subjected to resolution reduction processing before the joint image is detected, so that the SAR image is suitable for existing CFAR image processing, the detection efficiency can be improved by reducing the resolution, the false alarm rate can be kept constant and reduced, and meanwhile, the accuracy of a detection numerical value can be improved.

The invention discloses a full-automatic paster ticket inserting machine for a collection book. The full-automatic paster ticket inserting machine comprises a controller, a positioning mechanism in signal connection with the controller, more than one paster unit and a synchronous conveying system with a positioned conveying function. The number of the paster units corresponds to the number of pages of a to-be-pasted book body, and each paster unit comprises a page turning mechanism, a glue rolling mechanism and a picking mechanism which are arranged in sequence, and further comprises a feeding mechanism for providing to-be-pasted plasters for the picking mechanism. The page turning mechanisms are used for automatic page turning of the to-be-pasted book body; the glue rolling mechanisms are used for one-time glue rolling of pages; the picking mechanisms are used for one-time picking and pasting of the to-be-pasted plasters on the pages; and the efficient and automatic paster pasting process is achieved, and the problems of large labor intensity, low efficiency, poor quality and the like caused by manual operation are solved. The paster pasting position is accurate and unified, and the quality of the collection book is obviously improved.

The invention discloses a skylight positioning station which comprises a working platform, a lifting mechanism, an X-Y adjusting assembly, a rotating assembly, a taking assembly and a clamping mechanism. The lifting mechanism is arranged in the upper center of the working platform, the X-Y adjusting assembly is arranged on the lifting platform, the rotating assembly and the taking assembly are arranged on the X-Y adjusting assembly, the clamping mechanism is arranged on the working platform and comprises two moving guide rails, a sliding block, two moving assemblies, a first clamping assembly,a second clamping assembly, a third clamping assembly and two jacking assemblies, wherein the two moving guide rails are arranged on the two sides of the upper end face of the working platform in parallel, and the two moving assemblies are oppositely arranged on the two sides of the upper portion of the working platform and each comprise two moving supports, a driving air cylinder and an installation plate. The position of a skylight on the positioning station is accurate and unique, alignment for a mechanical hand is stable and reliable, automatic positioning for the skylight and taking positioning for the mechanical hand can be successfully completed, and high-quality products are provided for automatic plants.