781results about How to "Accurate and fast positioning" patented technology

A flexible connection unit for use in a spinal fixation device, includes: a longitudinal member having first and second ends; at least one spacer located between the first and second ends, wherein the at least one spacer comprises a first portion made from a first material and a second portion made from a second material; and at least one flexible member located in a longitudinal axial channel of the at least one spacer, wherein the first and second ends substantially limit motion of the at least one spacer in the longitudinal axial direction with respect to the at least one flexible member.

A flexible spinal fixation device having a flexible metallic connection unit for non-rigid stabilization of the spinal column. In one embodiment, the fixation device includes at least two securing members configured to be inserted into respective adjacent spinal pedicles, each securing member each including a coupling assembly. The fixation device further includes a flexible metal connection unit configured to be received and secured within the coupling assemblies of each securing member so as to flexibly stabilize the affected area of the spine.

A method of localizing a device, medical or otherwise, within a three dimensional environment, the method comprising: (a) transmitting time varying magnetic fields from at least three transmitters, (b) receiving the transmitted electromagnetic radiation as induced voltage signals from at least one receiver mounted on or within said device, and (c) a processing scheme for processing said received voltage signals in order to extract position and orientation localization information for said device, said processing scheme including correction for conducting materials in the vicinity by the use of information gathered from at least three distinct transmission frequencies for each of said transmitters.

The present invention provides a patient couch top or device for quickly and accurately positioning a patient during simulation and treatment by placing a series of small fiducial markers in discrete locations on the couch top or device. With use of the fiducial markers, the present invention allows for the correction for misalignment and deformation of patient positioning equipment which occurs due in part to a patient's size and weight. The present invention also provides a method for positioning a patient and correcting for deformation of the couch top or device.

An aircraft load management system that determines the position of an aircraft cargo hook for display to an aircrew. The cargo hook positional information may alternatively or additionally be communicated directly to a flight control system and a winch control system to automate and coordinate flight control inputs with winch operation to actively position the cargo hook. Data transfer from the cargo through a data link system also provides the load management system with exact position of the cargo load connection points even prior to attachment of the cargo hook to the load. The load management system also includes anti-sway algorithms for active load stability inputs to the flight control system and to alter flight control laws and automatically compensate for C.G. excursions.

Methods and systems for performing stateful signaling transactions in a distributed processing environment are disclosed. A method for performing stateful signaling transactions in a distributed processing environment includes receiving a signaling message at a routing node, such as a signal transfer point. The signaling message is distributed to one of the plurality of stateful processing modules. The receiving stateful processing module buffers the signaling message and initiates a stateful transaction based on the signaling message. Initiating the stateful transaction may include generating a query message and inserting a stateful processing module identifier in the query message. The query message is sent to an external node, such as an SCP, which formulates a response. The SCP may insert the stateful processing module in the response and send the response back to the signal transfer point. The signal transfer point decodes the response and uses the stateful processing module identifier to forward the response to the correct stateful processing module.

The invention relates to an ultra-wideband (UWB) wireless positioning method with high precision. The method comprises the following steps of: A. initializing a system; B. transmitting a UWB pulse signal; C. receiving and calculating the propagation delay tau of the pulse signal; D. sending the calculating result of the propagation delay tau; E. receiving the propagation delay tau; F. calculating the distance measuring result of each base station; and G. finally, calculating the positioning coordinate of a terminal to be positioned with a TOA (Time of Arrival) or TDOA (Time Difference of Arrival) positioning algorithm. The method is characterized in that after step E, backward filtration is carried out on the measuring value tau of the propagation delay by the maximum moving speed v of the terminal to be positioned; and the maximum probability measuring value of the propagation delay is used as the finally used propagation delay. The positioning method in the invention has the advantages of high reliability, accurate and quick positioning, and high anti-jamming capability, has no need of additional hardware equipment, and can be widely applied to position various wireless equipment.

The invention relates to the inertial measurement technology, the vision measurement technology and the combined measurement technology, in particular to a method using the combination of double IMUs (inertial measurement units) and monocular vision to measure the pose of a target object under a non-inertial system, and aims to accurately measure the pose information, relative to a motion reference system, of the target object under the non-inertial system. According to the technical scheme, the method includes: acquiring the relative angle speed and relative acceleration between the target object under the non-inertial system and the motion reference system according to the output differences of the two IMUs, subjecting the relative angle speed to compensation to obtain a relative pose angle, and subjecting the relative acceleration to integration to obtain a relative position; using the monocular vision to directly measure the rotation matrix and position vector, relative to a camera coordinate system, of the multi-feature-point target of the target object in the non-inertial system, and calculating a relative pose angle through the rotation matrix; unifying the two measuring results to obtain identical coordinate systems, and using a data fusion method to achieve relative pose measurement. The method is mainly applicable to pose information measuring occasions.

The invention adopts the between-class square error and the gray scale information to realize the rapid positioning of the inside and outside boundaries of the iris. Firstly, the interested pupil region is extracted through blocking; the between-class square error is adopted to obtain the pupil binary threshold for the extracted pupil region; then the inside boundary of the iris is positioned accurately through the searching of the boundary points and the curve fitting; the interested region of the iris outside boundary is extracted according to the prior knowledge and the pupil position parameter; the selected region is processed with median filtering and first-order gradient conversion; the iris outside boundary is determined through the local gradient integration method; finally, the iris outside boundary parameter is determined through the circle fitting. The method avoids the image binary from depending on the histogram; the image positioning time is greatly improved because only the interested region is processed; the whole image is not processed; the experiment indicates that the robustness and the positioning efficiency of the algorithm can satisfy the real-time processing requirement of the image.

A member of a rigid flexible elastic material, the member including a body portion and an aperture portion with the member adapted for delivery through an axial longitudinal channel of a percutaneous delivery subsystem, the aperture portion including an expanded mode having a lateral dimension greater than an inner diameter of the channel when the aperture portion extends outside the channel and a collapsed mode wherein the lateral dimension is not greater than the inner diameter of the channel when the aperture portion is within the channel, the channel including a first axial opening and a second axial opening with the aperture portion transitioning from the expanded mode to the collapsed mode when inserted into the openings and the aperture transitioning from the collapsed mode to the expanded mode when exiting from the openings.

The invention discloses a hash tree-based data dynamic operation verifiability method, which consists of three parts, i.e., a USER, a cloud data center (CDC) and a third party administrator (TPA) connected through a communication network, wherein the USER is used as a party of making a data memory service request, who hopes to store a data file owned by the party into a cloud storage space of the cloud data center, and can be both a personal user and an enterprise user; the CDC is used for responding to the data storage service request of the USER, storing the data file of the USER into the huge data center of the CDC according to a certain rule and managing and maintaining the data file; and the TPA is used as a reliable TPA and is commissioned by the USER to check the completeness and the consistency of the data file stored in the CDC data center. According to the hash tree-based data dynamic operation verifiability method, the verification problem of the completeness and the consistency of the user data file under a cloud computing environment is solved.

The invention provides a power utilization abnormal behavior recognition method based on a fuzzy neural network, and the method comprises the steps: extracting original data of a part of users as sample data from a power utilization database; carrying out the data preprocessing; designing a power utilization abnormal behavior evaluation index system on the basis of the analysis of power utilization abnormal behavior cases; constructing an expert sample based on the preprocessed data; taking an power utilization abnormal behavior mark as an input item, taking a power utilization abnormal behavior suspicion coefficient as an output item, and constructing a fuzzy neural network model; inputting test data into a built fuzzy neural network model, and carrying out the diagnosis of the power utilization abnormal behavior; evaluating a power utilization abnormal behavior diagnosis result, and a setting a target evaluation and optimization model. The method provided by the invention achieves the automatic recognition and diagnosis of the power utilization abnormal behavior, achieves the automatic training learning and modeling of a system, achieves the quick and precise positioning of a suspected user, and facilitates the obtaining of various illegal behaviors of power utilization.

The invention relates to a recognition method of a license plate number of a motor vehicle, and belongs to the technical field of license plate number recognition. The recognition method comprises carrying out median filtering and noise reduction to an input image containing a license plate, locating multiple license plate areas by utilizing a binarization processing method and a morphological processing method, carrying out rotation correction and edge removing processing to the license plate areas one by one, carrying out character cutting by utilizing a vertical projection method, carrying out further edge removing processing to obtained character blocks in a cutting mode, carrying out character recognition by utilizing an enhanced edition template matching method, and therefore achieving fast and accurate license plate recognition. The recognition method improves the precision of license plate location, and fast and precise location of the license plate is achieved. The recognition method can be used in a real-time license place recognition system, and for processing high-speed data flow, meanwhile is high in recognition accuracy, and has certain robustness on illumination variation, influence of rain and mist, indistinct license plates, broken characters and other bad conditions.

A cutting device, such as a beveling miter saw, includes a base, a work table supported on the base, and a cutting unit operably connected to the base. The work table includes a workpiece support surface and a stop portion. The cutting unit is selectively rotatable about a first axis between leftward and rightward bevel positions relative to the workpiece support surface. A rotatable stop member is coupled to the cutting unit and is selectively rotatable relative to the cutting unit to selectively contact the stop portion to thereby prevent rotation of the cutting unit in one direction about the first axis. The rotatable stop member and the stop portion may be positioned so that those elements contact when the cutting unit is at a predetermined bevel position, such as a vertical (0°) bevel position, relative to the workpiece support surface.

The invention relates to a shift rail position sensing system. There is a need for a rapid and accurate shift rail position sensing system. In a transmission shift mechanism shifts are performed by axially moving a shift rail which is slidable in a rail bore in a housing. A rail position sensing system includes a groove formed in the shift rail and a Hall effect sensor. The groove includes a curved bottom surface, a first ramp surface extending from one side of the bottom surface to an outer peripheral surface of the shift rail, and a second ramp surface extending from a second side of the bottom surface to an outer peripheral surface of the shift rail. The Hall effect sensor has a sensor shaft with an axis normal to an axis of the shift rail. The sensor shaft has a sensing tip which adjacent to and spaced apart from the groove, so that the Hall effect sensor is sensitive an entire range of positions of the shift rail.

The invention discloses a method for predicting a tree barrier threat by using point cloud data in a transmission line channel, which comprises: extracting pole points, transmission line points and vegetation points by subjecting a visible image captured by a UAV during a patrol inspection of a transmission line channel to a point cloud process; taking every two adjacent base poles as a basic unit, dividing a transmission line in each basic unit into a plurality sections in a two-dimensional plane, and selecting the center point of each section as a centroid point; successively calculating thedistance from each centroid point to each surrounding vegetation edge point, and using the minimum distance as the distance between the section of the transmission line and the surrounding vegetation; establishing a safety distance threshold of the transmission line, determining whether the transmission line has a tree barrier threat according to the safety distance threshold and the distance between the transmission line and the surrounding vegetation. The method solves the defects in the prior art that an airborne laser radar is required to be mounted on a large unmanned aerial vehicle, andis expensive and inconvenient to carry.

The invention provides a wireless network cloud platform system based on lighting nodes. The wireless network cloud platform system comprises a wireless gateway, at least one wireless lighting driver, at least one wireless lighting controller, at least one positioned terminal and a cloud server client side. A cloud server is connected with a wireless gateway, issues configuration information to the at least one wireless lighting driver and the at least one wireless lighting controller for configuration, controls the at least one wireless lighting driver and judges whether faults exist in a lighting line or not according to a current and energy consumption of the lighting line. Position monitoring is carried out on the positioned terminal according to the positioning information of the positioned terminal, the environment in a preset area is monitored according to environment parameters, and monitoring data are displayed to a user. According to the embodiment, wired lighting control is replaced with the wireless lighting, and labor cost and material cost can be saved. In addition, lighting energy consumption is monitored in real time, dimming is carried out according to current illuminance, and therefore electric energy consumption can be saved.

A first light source has a first wavelength corresponding to an excitation wavelength of a fluorophore. The excitation wavelength and an emission wavelength of the fluorophore delineate a predetermined interval. A second light source has a second wavelength offset with respect to the first wavelength so as to be outside said predetermined interval. The offset between the first and second wavelengths is comprised between 30 nm and 100 nm. A camera comprises a filter opaque to the first and second wavelengths and transparent to the emission wavelength and to wavelengths substantially higher than the higher of the first and second wavelengths. The light sources and camera are synchronized to alternately activate one of the light sources and make the camera alternately acquire a fluorescence image and a background noise image.