5results about How to "High coordinate accuracy" patented technology

The present invention discloses a high-precision underground pipeline obvious point positioning and mapping device. It includes an image acquisition module, a GNSS positioning module, a main control module and an integrated mobile device; the image acquisition module, the GNSS positioning module and the main control module are all located on the integrated mobile device; the main control module includes a power module, a synchronization control module and a data storage module; the power module is respectively connected to the image acquisition module and the GNSS positioning module; the data storage module is respectively connected to the image acquisition module and the GNSS positioning module; the integrated mobile device includes a mobile mounting plate and a connecting support component; the image acquisition module is installed at the lower end of the connecting support component; the GNSS positioning module is installed on the connecting support component. The present invention has the advantages of being simple and fast, improving the efficiency of obvious point measurement, and reducing costs and safety risks. The present invention also discloses a positioning and mapping method for a high-precision underground pipeline obvious point positioning and mapping device.

The invention discloses a strip network railway base station data processing method and system. The method comprises the following steps: obtaining observation data of a plurality of IGS base stations; obtaining observation data of a plurality of standard reference stations in a preset range around the strip network railway reference station, wherein the standard reference stations comprise a national station, a provincial station and a Chinese tectonic environment monitoring network station; and based on the observation data of the IGS reference station, combining the observation data of the standard reference station to perform hierarchical calculation on the plurality of railway reference stations to obtain space coordinate data of each railway reference station. Observation data of an IGS base station and standard base stations such as surrounding national stations and provincial stations are obtained, and a rich data basis is provided for railway base station coordinate measurement and calculation. A hierarchical resolving mode is adopted, the coordinate precision is improved, error accumulation is avoided, and the result reliability is enhanced; the method can adapt to different precision requirements and complex environments, considers local differences, and meets the requirement of a strip network railway for high-precision coordinate data.

The application discloses a kind of chromaticity instrument measurement display product chromaticity coordinate area determination method, including (1) chromaticity coordinate stability determination;(2) chromaticity target area optimization;(3) chromaticity target area attribution determination optimization;Traditional stability determination mode is single dimension, CIE1931 original chromaticity coordinate is provided in the form of discrete data with 1nm as wavelength interval, sampling interval is larger, precision is limited, traditional attribution determination is large in amount of calculation for chromaticity diagram of data point dense, according to covariance matrix construction minimum chromaticity ellipse, the spatial distribution characteristics of point set is determined by analysis chromaticity coordinate stability;Original chromaticity point is fitted using piecewise polynomial interpolation, and the coordinate precision is optimized to 0.01nm, two-stage rapid determination strategy is used, first based on polar angle realizes candidate sector preliminary screening, then in the local candidate sector obtained by preliminary screening, accurate determination is carried out using local ray method, and target area positioning of chromaticity coordinate is completed.

The present application relates to a method, device and electronic device for generating road signs. The method includes: acquiring multiple frames of target images; extracting feature points in each target image respectively, and matching the feature points in two adjacent frames of target images to obtain the relative pose of the two adjacent frames of target images and the three-dimensional coordinates corresponding to the feature points; determining the absolute pose of the remaining target images respectively according to the preset absolute pose and relative poses of one of the frames of target images; performing graph optimization according to the absolute pose and the three-dimensional coordinates and pixel coordinates of the feature points to obtain the optimized absolute pose; obtaining the optimized relative pose corresponding to each target image according to the optimized absolute pose; triangulating according to the pixel coordinates corresponding to the corner points of the target road sign to obtain the optimized three-dimensional coordinates of the corner points. The solution provided by the present application can improve the coordinate accuracy of the corner points of the road sign, and has high robustness to cope with the processing of each road sign.

An automatic driving assistance system is used to solve the problem that the positioning unit installed in the conventional vehicle has poor accuracy, which leads to positioning errors. It includes: a positioning unit, which is used to generate a vehicle body coordinate; a correction module, which is used to obtain the correction parameters between the vehicle and the positioning reference object; a processor module, which receives a parking path, which is composed of a plurality of track coordinates, each of which has an actual value between the track coordinate and the positioning reference object, and the processor module analyzes whether the vehicle body coordinate is the same as an end point coordinate. If not, the processor module obtains a track coordinate closest to the vehicle body coordinate, controls the vehicle to move to the track coordinate, calculates the difference between the correction parameter and the actual value, and enables the vehicle-mounted computer to control the vehicle to perform movement compensation according to the difference.