18results about How to "Solve the positioning accuracy" patented technology

The invention discloses an underwater vehicle positioning method based on a motion compensation model and sound velocity error estimation, which relates to the technical field of ocean measurement and comprises the following steps: deducing a layered approximate calculation formula of sound ray propagation time and horizontal distance quantity on the basis of a ray acoustic propagation model; constructing a motion compensation model of the submersible vehicle, fitting motion state coordinates of the submersible vehicle by using a primary function about time, and performing linearization calculation of sound propagation time about a to-be-estimated coefficient in a ray acoustic propagation model; establishing a sound velocity error estimation model, enabling the sound velocity error to be equivalent to sound velocity deviation in each positioning period, and carrying out the linearization calculation of the sound propagation time with respect to the sound velocity deviation under a ray acoustic propagation model. According to the invention, the method can not only avoid solving the position coordinates of the transmitting and receiving signals of the transponders to compensate the motion model error of the submersible vehicle, but also can compensate the sound velocity error to improve the positioning precision of the submersible vehicle.

The present application discloses a single-frequency GNSS unmanned aerial vehicle positioning method, device, medium and product, which relates to the field of unmanned aerial vehicle positioning. At any current moment: the distance and ionospheric delay of each satellite are determined based on the position coordinates of each satellite and the position coordinates of the unmanned aerial vehicle at the previous moment; the tropospheric delay at the current moment is determined based on environmental parameters; three satellites are determined as first target satellites, and two satellites are determined as second target satellites; pseudo-range observation values ​​are calculated based on the distance, corrected clock error data, ionospheric delay and tropospheric delay of each first target satellite; phase observation values ​​are calculated based on the distance, corrected clock error data, ionospheric delay, carrier phase integer ambiguity and tropospheric delay of each second target satellite; the position coordinates of the unmanned aerial vehicle are determined based on the pseudo-range observation values ​​and position coordinates of each first target satellite, and the phase observation values ​​and position coordinates of each second target satellite. The present application improves the accuracy of unmanned aerial vehicle positioning and reduces costs.

The invention discloses an engineering machinery carrier positioning method based on visual identification and related equipment, which can well solve the problem of positioning precision of remote control engineering machinery, can realize high-precision positioning of an engineering machinery carrier, and avoids influence on operation safety. The method comprises the following steps: acquiring an image set shot by an unmanned aerial vehicle, wherein the image set comprises at least one image of an engineering operation site; using a convolutional neural network model to judge whether the images in the image set contain a target object, wherein the target object is an engineering machinery carrier in the engineering operation site; if yes, generating a bounding box at a target object of the image; extracting pixel coordinates of the target object according to the bounding box; according to the pixel coordinates, the position of the unmanned aerial vehicle and parameters of the camera on the unmanned aerial vehicle, the distance between the camera on the unmanned aerial vehicle and the target object and the sight angle between the camera on the unmanned aerial vehicle and the target object are calculated.

The invention discloses a water-air fast scanner and a water bottom scanning method based on the water-air fast scanner, and relates to the field of water body ecological environment investigation. The problems that an existing underwater scanner cannot be suitable for a shallow water area with the water depth smaller than 5 m, GPS position information and a real scanning position are staggered, and the position precision of a bottom map is reduced are solved. The method comprises the following steps: determining a deployment mode of a water-air rapid scanner, and selecting a corresponding baseline length and array spacing; configuring a working mode of the camera array, and synchronizing the camera array and a GPS module clock; the water-air fast scanner records water bottom image information; extracting a video frame; calculating scanning track coordinate data of each camera; interpolation is carried out on the scanning track coordinate data, and a smooth GPS motion track is obtained; acquiring a route track of the camera according to the GPS motion track and the array spacing; and performing reconstruction processing on the route trajectory by adopting SfM to obtain a water bottom image. The method is suitable for the fields of ocean research, geological survey, underwater archaeological and the like.

The utility model relates to an adjustable graphite boat pushing and positioning mechanism, which comprises a mounting bottom plate, at least one pushing and positioning mechanism, a positioning device and a positioning device, the pushing and positioning mechanism comprises a boat fixing reference frame body, a graphite boat, a sliding boat support and a boat pushing device, the graphite boat is arranged on the sliding boat support, and the boat pushing device is used for pushing the graphite boat to slide on the sliding boat support to the boat fixing reference frame body for positioning. The utility model relates to the technical field of battery piece production, in particular to an adjustable graphite boat pushing and positioning mechanism, which is characterized in that a sliding boat support and a boat pushing device are respectively used in two vertical directions of a graphite boat to realize clamping and positioning of the graphite boat, and the problem of positioning accuracy of the graphite boat can be effectively solved; the sliding boat support is used for clamping the graphite boat from the two ends of the graphite boat in the length direction, the boat pushing device is used for pushing the graphite boat to the boat positioning reference for positioning, the graphite boat positioning device can be applied to graphite boats of any specifications, it is guaranteed that when the graphite boat flows to the sliding boat support, the positioning action is achieved, and it is guaranteed that the graphite boat is fixed, so that a mechanical arm grabs silicon wafers from the graphite boat conveniently.

The invention discloses a detection method, device and equipment based on visual detection of defects and a storage medium, and relates to the technical field of image processing, and the detection method based on visual detection of defects comprises the following steps: obtaining to-be-processed image data and carrying out data preprocessing to obtain defect image data; defect detection processing is conducted on the defect image data based on a defect detection model, surface defect detection data are obtained, a loss function is added to the defect detection model, and the defect detection model is obtained by improving a YOLO model; and screening the surface defect detection data to obtain a surface defect detection result. According to the invention, the accuracy of defect detection is improved.

The invention relates to the technical field of integrated navigation, in particular to a positioning method and system based on optical angle measurement and astronomical-inertial integrated navigation. According to the method, firstly, a star image and a navigational satellite image are obtained at the same time by shooting a star map, after recognition and processing, the attitude of a camera relative to a geocentric inertial coordinate system is calculated by utilizing the star, and then the coordinate of the navigational satellite in the coordinate system is determined. And obtaining angle information of the navigation satellite relative to the observer under the earth coordinate system through coordinate transformation. Optical angle measurement information is fused with attitude, speed and position information output by an inertial navigation system, a Kalman filtering state equation and an observation equation are constructed, and finally real-time high-precision calculation and updating of the position of the observer are achieved. According to the method, the accuracy of optical angle measurement, the limited distance reference of celestial navigation and the autonomous continuity of inertial navigation are fused, and the navigation positioning accuracy and reliability under the complex environment and the satellite denial condition are effectively improved.

The invention relates to the technical field of environmental perception fusion positioning, and provides a positioning method and system based on a Bayesian filtering neural network, and electronic equipment, and the method comprises the steps: obtaining an observation waveform matrix generated after a base station receives a waveform signal transmitted by a target object at each sampling moment; inputting the observation waveform matrix into a preset positioning model to obtain positioning information of the target object; the positioning model uses a recurrent neural network to fit a Bayesian filtering result, the recurrent neural network is trained through a cost function including motion likelihood and observation likelihood, the motion likelihood is generated based on a motion model of a target object sample, and the observation likelihood is generated based on position information of the target object sample determined by adopting a parameter estimation algorithm. The method is used for overcoming the defects that in the prior art, when a Bayesian filtering algorithm is applied to environment perception fusion positioning, a positioning result can be obtained only by depending on an approximation algorithm and complex derivation, and then the positioning speed and the positioning precision are affected.

The utility model discloses a special mould changing trolley for a sewing machine, which comprises a trolley body, universal wheels are mounted at the bottom of the trolley body, a winch supporting seat I is mounted on the front side of the trolley body, a winch I, a winch guide frame I and an inlet rope wheel are sequentially mounted at the top of the winch supporting seat I, and a mould positioning device I and a mould trolley roller way are mounted at the top of the trolley body. The first mold positioning device is located in front of a mold trolley roller way, eyebolts are installed on the operation side and the driving side of a mold, the second mold positioning device is installed on the driving side of the sewing machine, and an outlet rope wheel, a second winch guide frame and a second winch are sequentially installed on the second winch supporting base. According to the utility model, an on-line die can be directly dragged out by utilizing a spacious space on the side surface, so that the replacement time is saved, the problem of positioning accuracy of the replaced die is avoided, and the number of workers is reduced.

The utility model discloses a cutting device is used in acrylic panel processing, include: shell, the inside fixed of shell is equipped with transport platform, the output of motor is worn into the shell fixed connection has second pivot, the outside fixed connection of second pivot has two groups of crown gear, the left side frictional coupling of crown gear has second gear, the central position fixed connection of second gear has second screw rod, and the both ends of second screw rod are rotatably connected with support plate through bearing, and the outside swing joint of two groups second screw rod has push block, and the device is designed as the front end can decline formula structure through supporting the table, realizes the automatic unloading function after cutting, and keeps flush with transport platform after resetting, provides stable support for the front end of board, effectively solved the positioning accuracy problem that the thin plate was caused by gravity droop, adopts the design of screw rod drive baffle cooperation integrated scale mark simultaneously, realized fast accurate positioning.

The utility model belongs to the field of drill rod inserting devices, and particularly relates to a safe drill rod inserting device for water and soil conservation monitoring, which comprises a main body, a quick disassembly and assembly component is arranged on one side of the main body and comprises a fixed seat arranged on one side of the main body, and a protective shell is arranged at the top of the fixed seat. A water and soil conservation monitor is fixedly mounted at the top of the protective shell, a servo motor is fixedly mounted in an inner cavity of the bottom of the protective shell, a first belt wheel is fixedly mounted at the output end of the servo motor, a transmission belt is in meshed connection with the outer surface of the first belt wheel, and a second belt wheel is in meshed connection with the other side of the transmission belt; a servo motor drives a first belt wheel and a transmission belt to drive a second belt wheel and a ball screw to rotate, so that a ball nut moves along the ball screw, clamping connection or separation of a second clamping block and a clamping groove is achieved, the rapid mounting and dismounting functions of the protection shell and the water and soil conservation monitor are achieved, the problem that an existing device is tedious in mounting and dismounting is solved, and the practicability is high. And the efficiency of monitoring work is improved.

This invention discloses an intelligent inspection system for the appearance and dimensions of capacitors, belonging to the field of capacitor appearance quality inspection technology. It aims to solve the problems of low efficiency, inconsistent standards, limited functionality, and cumbersome workstation switching in existing manual inspection methods. The system includes an image acquisition module, an image processing and inspection module, a workstation control module, and an information storage and output module. The supporting hardware structure includes a chassis, a rotary motor, a pentagonal turntable, an extension block, a lifting cylinder, and a mechanical gripper. Through multi-station image acquisition and comprehensive image processing, it achieves full-dimensional inspection. The workstation control module, in conjunction with the hardware, completes automatic transfer and positioning, and the inspection data is uniformly stored and output. This invention achieves automated full-dimensional inspection, improves inspection efficiency and accuracy, ensures consistency in judgment, is suitable for mass production, and facilitates quality traceability and control.

The present application relates to the technical field of integrated navigation, in particular to a positioning method and system based on optical angle measurement and astronomical-inertial integrated navigation. The method first acquires star and navigation satellite images by shooting a star map, and then calculates the attitude of the camera relative to the geocentric inertial coordinate system by identifying and processing the stars, and further determines the coordinates of the navigation satellite in the coordinate system. Through coordinate conversion, the angle information of the navigation satellite relative to the observer in the earth coordinate system is obtained. The optical angle measurement information is fused with the attitude, speed and position information output by the inertial navigation system, the Kalman filter state equation and observation equation are constructed, and finally the real-time high-precision solution and update of the observer's position are realized. The present application combines the accuracy of optical angle measurement, the limited distance reference of astronomical navigation and the autonomous continuity of inertial navigation, effectively improving the navigation and positioning accuracy and reliability under complex environment and satellite denial conditions.

The utility model discloses an insulation tube sealing insulation enhanced wind power slip ring, which relates to the technical field of wind power slip rings and comprises a slip ring hollow shaft, a PE conducting ring, a plurality of insulation spacer rings, an L conducting ring, a K conducting ring, an M conducting ring, an M conducting column, an L conducting column, a K conducting column, an insulation tube and a sealing glue layer. According to the wind power slip ring provided by the utility model, the conductive ring is additionally provided with the positioning seam allowance used for installing and positioning the insulating tube; on one hand, the problem of positioning accuracy of the insulating tube is solved, so that the uniformity of sealing glue gaps is improved, the insulating sealing performance is improved, on the other hand, all the gaps can be filled with glue, and meanwhile, the dynamic balance accuracy and the operation stability of the slip ring are improved; the positioning seam allowance is arranged on the conducting ring, and the root part of the insulating tube is embedded into the conducting ring, so that the fixing strength is improved, the insulating sealing performance between phase rings is also enhanced, the slip ring runs more stably and reliably, and the electrical fault of the slip ring is reduced.

The invention relates to the technical field of vehicle positioning, and provides an environment modeling method and system based on rtk and a laser radar, and the method specifically comprises the steps: obtaining a point cloud density correction factor through calculation, and carrying out the dynamic adjustment of the scanning density of the laser radar according to the point cloud density correction factor; calculating the pose increment of each frame of point cloud data; obtaining a comprehensive pose after fusion positioning; checking the similarity between the current frame and the previous key frame through an ICP algorithm, and if matching succeeds, generating a loopback detection constraint; and performing optimization calculation, generating an optimal pose and an optimal map, constructing an environment model according to the optimal pose and the optimal map, and performing automatic positioning on the vehicles in the range according to the environment model. According to the invention, the problem that in the prior art, a vehicle positioning method is realized only by using a laser radar, and the position of the current environment in a geographic coordinate system cannot be obtained, so that initialization repositioning is difficult in subsequent automatic driving application is solved.

The invention discloses a mainboard detection contact position determination method and apparatus, an electronic device and a storage medium. The method comprises the steps of extracting design coordinates of a to-be-tested contact and a position identification point on a mainboard design drawing; constructing a mapping relation matrix between the design coordinates of the position identification points and the world coordinates of the position identification points on the physical mainboard by taking the position identification points as a reference; determining a to-be-tested contact to be tested at present according to an item to be tested, and acquiring a design coordinate of the to-be-tested contact; and according to the mapping relation matrix and the design coordinate of the to-be-tested contact, determining the world coordinate of the to-be-tested contact on the physical mainboard. According to the method for determining the position of the mainboard detection contact, the positioning precision of the to-be-detected contact is improved, and automatic execution of an electric signal test of a notebook computer mainboard is achieved.

The application belongs to the field of high-end equipment manufacturing industry, and relates to a manufacturing method of a multi-station precision stamping die for isolation strip metal products, which comprises the following steps: obtaining initial design data of a multi-station layout, calculating a potential range of error accumulation by analyzing the transfer path and positioning point distribution of a workpiece between stations, and obtaining a distribution model of workpiece transfer error; obtaining matching parameters of integrated design optimization, determining the deformation and size deviation of the workpiece between the stations by running a virtual machining process on a continuous stamping stability test platform, and obtaining real-time data of error accumulation control; and for the real-time data of error accumulation control, if the deformation exceeds a preset stability threshold, the guide gap and support point position of the precision guide mechanism are adjusted iteratively to determine the final guide system configuration scheme.

The application discloses a method and device for improving positioning accuracy of a steel taking machine of a heating furnace, and belongs to the technical field of hot-rolling heating furnaces. The method is implemented by refining C values in a mathematical model of the steel taking machine of the hot-rolling heating furnace, obtaining C values of slabs of various widths, and determining advancing or retreating APC strokes of the steel taking machine. The mechanical inertia of the equipment when the steel taking machine is stopped is improved through PLC, so that the steel taking machine is positioned. The slabs of various widths are debugged and functionally improved, so that the positioning accuracy of the steel taking machine can be directly quantified. The application can improve the position accuracy of the steel taking machine and solve a series of problems such as steel spreading and deviation of the heating furnace.