5142 results about "Position fixing" patented technology

A collision detection and path prediction system (10) adapted for use with a traveling host vehicle (12) having an operator, includes a locator device (20) configured to determine the current position coordinates, and pluralities of trail and immediate dynamic path coordinates of the vehicle (12) and a communicatively coupled traveling remote vehicle (16). The system further includes a preferred controller (36) configured to predict a collision between the two vehicles (12,16) from the coordinates, and determine a plurality of projected path coordinates for the host vehicle (12) relative to the remote vehicle (16) trail coordinates.

Embodiments provide an “always-on,” accurate, low power, and low cost solution for indoor positioning. The indoor positioning solution is enabled by one or more low power, low cost location beacons, which can be easily configured and installed in any indoor environment to support position determination. In an embodiment, the location beacons use a low power, low data rate wireless radio technology (e.g., Bluetooth Low Energy (BLE)), well suited for typical indoor ranges and data rates needed to support positioning. The location beacons may be rechargeable via ambient light and require no external power source. In addition, the location beacons benefit from a very cost efficient design, which allows for ubiquitous utilization of the enabled indoor positioning solution in a variety of indoor locations, public or private, small or large.

The invention relates to an instrument able to be introduced into a body as well as an imaging position fixing system and position fixing method for the instrument. A magnet able to be rotated with a rotation drive is provided in an end section of the instrument. The position of the magnet in the body can be determined on the basis of the strength of a magnetic alternating field created by a rotation of the magnet.

A Global Navigation Satellite System (GNSS) receiver and associated method capable of tracking weak GNSS signals from a plurality of GNSS satellites. In a preferred embodiment, code and carrier tracking loops are initially closed around the code phase, carrier frequency, and data bit edge estimates handed over from an acquisition mode. In subsequent tracking, early, prompt, and late copies of the code replica are correlated with the incoming signal. The prompt correlations are coherently integrated over an extended updating interval for data bit edge and sign estimation as well as for carrier phase and frequency error discrimination whereas the early and late correlations are used for code error discrimination. Code delay and carrier phase and frequency errors are used to update the code and carrier tracking loop filters. Together with data bits, they form observables of a GNSS signal's time and frequency parameters for timing and position fixing.

The invention discloses a microminiature personal combined navigation system as well as a navigating and positioning method thereof. The system is composed of a subsystem installed on the foot part of a human body and a subsystem installed on the trunk position, wherein the subsystem installed on the foot part comprises an MEMS IMU (Micro-electromechanical Systems Inertial Measurement Unit), a magnetometer and a communication module; and the subsystem installed on the trunk position comprises a satellite navigation receiver, a Doppler velometer, an atmospheric pressure altimeter, a communication module and a microminiature navigation computer. The positioning method comprises the following steps of: collecting the MEMS IMU signal; modeling and correcting the random error of a gyroscope and an accelerometer; initially aligning an MEMS inertial navigation system; resolving strapdown inertial navigation, and correcting zero speed; carrying out combined navigation of the MEMS inertial navigation system/ satellite navigation receiver/ the Doppler velometer/ the magnetometer/ and the atmospheric pressure altimeter; and displaying the navigation result in real time. The microminiature individual combined navigation system is convenient to individually carry, individual real-time gesture fixing, velocity measurement and positioning can be realized, and whole and precise real-time navigation positioning information can be provided for pedestrians, operating personnel, soldiers, rescue workers and the like in the complex electromagnetic environment.

A horizontal navigation system aided by a carrier phase differential Global Positioning System (GPS) receiver and a Laser-Scanner (LS) for an Autonomous Ground Vehicle (AGV). The high accuracy vehicle navigation system is highly demanded for advanced AGVs. Although high positioning accuracy is achievable by a high performance RTK-GPS receiver, the performance should be considerably degraded in a high-blockage environment due to tall buildings and other obstacles. The present navigation system is to provide decimetre-level positioning accuracy in such a severe environment for precise GPS positioning. The horizontal navigation system is composed of a low cost Fiber Optic Gyro (FOG) and a precise odometer. The navigation errors are estimated using a tightly coupled Extended Kalman Filter (EKF). The measurements of the EKF are double differenced code and carrier phase from a dual frequency GPS receiver and relative positions derived from laser scanner measurements.

Systems and methods for automatic steering of marine seismic towing vessels are described. One system comprises a towing vessel, a seismic source, and optionally one or more seismic streamers towed by the towing vessel; a steering sub-system for steering the vessel, the sub-system including a vessel steering algorithm for calculating an optimum vessel steering path; and a controller to produce a difference between a measured position of a tracking point with a pre-plot position of the tracking point, and calculate a set point based on the difference to the steering algorithm. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, allowing a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

The invention provides a positioning method and system based on a safe driving map and binocular recognition of traffic signs. Primary positioning of a running vehicle is carried out via the positioning system by means of a high-precision map. Meanwhile, images of the part in front of the vehicle are acquired, and traffic signs in the images are detected and identified. Coordinates of the traffic signs are recognized and obtained in the high-precision map, the distance between the vehicle and the signs are measured, and the position of the vehicle is calculated by comparing the coordinates of the traffic signs. In this way, the vehicle is positioned. By means of the invention, on the basis of traditional navigation data, acquisition of road traffic signs is added, roads signs are adopted to help positioning vehicles, the distance between vehicles and traffic signs is measured according to coordinates and sizes of signs which are recognized by left and right cameras, and vehicle positions are calculated according to spatial coordinates of traffic signs which are already stored in the high-precision map, so that submeter-level coordinate positioning is provided and a lane-based topology network is established.

In order to determine positional information, about a mobile robot, Real Time Kinematic (RTK) Global Satellite Navigation System (GNSS) measurement data are obtained by at least two GNSS receivers mounted on the mobile robot. Estimates of the covariance matrices of the measurement data are computed. The RTK GNSS measurement data are combined according to the covariance matrices to obtain enhanced positional information. The results may be fused with data from an IMU to obtain driftless attitude and/or localization information.

The invention discloses an underground space high-precision positioning method based on laser scanning and sequence encoded graphics. Aiming at the rapid high-precision positioning, orientation, altitude determination and navigation of moving targets in a GPS signal-free underground well of a mine, the method can make the breakthrough in key directions from the design, decoding and optimized layout of the encoded graphics, the economical and rapid acquisition of a fine and accurate road network-a three-dimensional well network space model consisting of underground tunnels of mine, a high-precision positioning algorithm of the moving targets in well restraint spaces (precise resolving of position, direction, altitude parameters), a three-dimensional well network space matching algorithm, athree-dimensional navigation technology to a final navigation platform and terminal control system, and the like, thus key technologies for underground rapid high-precision positioning and navigationas well as software and hardware systems are formed to eventually achieve the leaping-development of a underground unmanned mining technology for the mine in our country. Besides, the method disclosed in the invention can also meet the application demands of large urban underground space, deep and long traffic tunnel, large grotto, large building interior, large overpass and subway space on the rapid high-precision positioning and navigation of the moving targets, thereby pushing forward the development of the underground space positioning technology in our country.

A bone cutting guide block has a cutting tool guide surface and a navigation mount for a navigation tracker component for computer aided positioning of the guide for a resection procedure. In various embodiments, the guide includes a rotation means. Preferably, a swivel with a pivot apparatus is provided to limit rotation to permit controlled flexion-extension angle about the pivot with respect to the cutting guide surface. A fixing member through the swivel permits for varus-valgus adjustment of the guide surface. Optionally, a positioning actuator and/or biased resistance actuator implements more regulated flexion-extension angle adjustment with the swivel. Various traversing mechanisms, such as a threaded wheel or pivoted cam tool permit controlled proximal-distal adjustment of the cutting guide surface.

The invention discloses an autonomous parking system based on multi-vision inertial navigation integration. The autonomous parking system comprises a binocular vision SLAM module, a round looking parking detection module and a decision and control module, wherein the binocular vision SLAM module is used for generating a parking lot simulating map by acquired parking lot images through the multi-vision inertial navigation integration, obtaining real-time positioning information of a vehicle under a coordinate system of the parking lot simulating map, and transmitting the real-time positioning information to the decision and control module; the round looking parking detection module is used for acquiring current position data of the vehicle for current environmental distinction detection, and transmitting the testing result to the decision and control module; and the decision and control module is used for making a vehicle autonomous parking strategy according to the received geographicpositioning information of the vehicle in the parking lot simulating map and the current environmental distinction parameters. The invention also discloses an autonomous parking method based on the multi-vision inertial navigation integration. The autonomous parking method is used for realizing the autonomous parking system.

Drilling method of carbon dioxide laser includes steps: preparing locating point on layer next to the outer layer; before pressfitting added layer, browning oxidizing surface of target bonding pad; after pressfitting added layer, milling location hole / polishing edge, washing surface under high pressure; browning front surface of copper, thinning and coursing the surface before drilling hole by layer; first time to drill hole by laser; positioning film perforation by using plate location hole in original etching method for making window of copper, burning through copper foil and resin above the locating point on layer next to the outer layer so as to expose the locating point; second time to drill hole by laser; using the exposed locating point as position fixing to make micro hole inplate; washing surface under high pressure to remove browning layer after drill hole. The invention saves dry film and etching liquid, and raises process precision.

The invention discloses a high-precision vehicle positioning method for fusing multi-source information under a GPS (global positioning system) blind area and a device. By a strap-down matrix algorithm of the method, INS (inertial navigation system) vehicle position information and position information obtained by a pavement matching technology are calculated according to angular rate information output by a gyroscope and acceleration information output by an accelerometer and are fused by a kalman filtering algorithm to output final fused positioning information. As an INS positioning algorithm has an accumulated error, vehicle position information is recalibrated by arranging an anchor node beside a road. According to the method, stable and reliable high-precision vehicle position information can be obtained; the method is suitable for non-GPS-signal environments such as urban roads with dense buildings, mountain areas and tunnels.

The invention relates to the inertial-navigation-based technology and the satellite real time differential positioning technology. The vehicle accuracy positioning method of the invention utilizes wireless broadband data communication to provide accurate positioning to the vehicle. The vehicle accuracy positioning method combines the inertial navigation, the satellite real-time differential positioning technology and wireless broadband data communication together, provides a seamless positioning system applicable to intelligent transportation, provides real-time, stable and continuous position information from a sub-meter level to a centimeter level to a moving vehicle, and can realize a lane level positioning navigation. The technical scheme of the vehicle accuracy positioning method is that: the vehicle accuracy positioning method comprises a base station and a mobile terminal; a base station is installed near a road and consists of a base station satellite receiving machine and a wireless broadband communication module; and the mobile terminal is installed on the vehicle and consists of a wireless broadband communication module and a combination positioning system.

The present invention relates to a method for estimating location of a moving object in a navigation system, which is capable of accurately estimating location of the object in a shadow area of GPS location data so that navigation service is provided. A method for estimating location of a moving object in a navigation system includes the steps of: (a) receiving GPS location data from a moving object; (b) determining GPS shadow area by using the received GPS location data; (c) calculating moving straight distance of the moving object with reference to a last GPS location data in visible regions when the moving object is in a GPS shadow area; (d) calculating virtual location data by using the calculated moving straight distance of the moving object; and (e) calculating estimated location on a digital numeric map positioned nearest from the virtual location data, and performing a map-matching to provide a navigation service.

The invention provides a SLAM method applied to a multi-lens combination panoramic camera, which well realizes the automatic positioning and map construction functions of a vehicle-mounted multi-lenscombination panoramic camera, and achieves a high positioning accuracy of 0.1 m level without resorting to an expensive GPS/IMU integrated navigation system. The method firstly performs camera calibration on a multi-lens combination device, and then establishes a parallel three-thread, wherein the pose tracking thread mainly completes system initialization, feature extraction on a panoramic image,matching and projection, pose solution optimization and selection of key frames; The sparse map construction thread is mainly responsible for establishing sparse map points according to the initial posture and matching points, optimizing the camera posture and map points locally, and eliminating the wrong map points and redundant key frames. The closed-loop correction thread is mainly responsiblefor detecting whether the motion of the camera has returned to the previous position (i.e. Closed-loop), adding closed-loop constraints to correct the posture and global posture and map point optimization (i.e. Global beam adjustment).

The invention relates to a visual navigation based multi-crop row detection method, which belongs to the related field of machine vision navigation and image processing, and aims to quickly and accurately extract a plurality of ridge lines in farmland and meet the requirements of the real-time navigation and positioning of agricultural machinery. The invention provides an agricultural machine vision navigation based multi-crop row detection method, which comprises the steps: calibrating camera parameters, acquiring video and image frames, and carrying out distortion correction for the image; dividing a crop ridge line area, extracting navigation positioning points by using the vertical projection method, and calculating the world coordinates of the positioning points; using the random straight line detection method to calculate the positioning points, and detecting the straight lines on which crop ridge rows are positioned; and obtaining the position of each crop ridge row in a world coordinate system relative to the agricultural operation machinery by calculation according to the slope parameters and intercept parameters of the straight lines. Compared with the traditional technology, the technical scheme of the invention greatly reduces time complexity and space complexity, and also improves the accuracy and the real-time of navigation.

The present invention relates to an integrated structure for an optical refractor, and more particularly to an integrated structure between a circuit board and an optical refractor which enables exposing the light source after dismantling to facilitate replacement and maintenance thereof.

The integrated structure is composed of a planar baseplate, centrally integrated with an optical refractor lens, and the bottom surface of the baseplate is provided with a male end clasping portion parallel to the incident light surface, the male end clasping portion being further provided with position fixing tenons used for fixing position and clasp pins used for clasping, thereby enabling convenient disassembly and replacement to facilitate exposing the light emitting crystal on the front surface of the circuit board to enable maintenance and replacement.