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1479results about How to "Improve smoothness" patented technology

Binocular stereoscopic vision matching method combining depth characteristics

The invention discloses a binocular stereoscopic vision matching method combining depth characteristics. The binocular stereoscopic vision matching method comprises: obtaining a depth characteristic pattern from left and right images through a convolutional neural network; calculating a truncation similarity measurement degree of pixel depth characteristics by taking the depth characteristics as the standard, and constructing a truncation matching cost function combining color, gradients and depth characteristics to obtain a matched cost volume; processing the matched cost volume by adopting a fixed window, a variable window and a self-adaptive weight polymerization or guide filtering method to obtain a cost volume polymerized by a matching cost; selecting an optimal parallax error of the cost volume by adopting WTA (Wireless Telephony Application) to obtain an initial parallax error pattern; then finding a shielding region by adopting a double-peak test, left-right consistency detection, sequence consistency detection or shielding constraint algorithm, and giving a shielding point to a parallax error value of a same-row point closest to the shielding point to obtain a parallax error pattern; and filtering the parallax error pattern by adopting a mean value or bilateral filter to obtain a final parallax error pattern. By adopting the binocular stereoscopic vision matching method combining the depth characteristics, the incorrect matching rate of three-dimensional matching can be effectively reduced, the images are smooth and image edges including edges of small objects are effectively kept.
Owner:KUNMING UNIV OF SCI & TECH

Unmanned gyroplane moving target autonomous tracking device and control method thereof

The invention relates to the technical field of unmanned gyroplane autonomous tracking, in particular to an unmanned gyroplane moving target autonomous tracking device based on a pan-tilt camera and an airborne sensor. The unmanned gyroplane moving target autonomous tracking device comprises an aircraft and a ground station. The aircraft comprises an aircraft controller, an aircraft propeller motor connected with the aircraft controller, and a pan-tilt motor. The pan-tilt motor is connected with the pan-tilt camera. A wireless image transmission module and a wireless data transmission module are arranged between the aircraft and the ground station. The aircraft and the ground station are connected through the wireless image transmission module and the wireless data transmission module. Images obtained by the airborne pan-tilt camera serve as input of a system, coordinates of a target in the images are obtained on the ground station through a Struck algorithm, modeling is conducted on the coordinates of the target through a uniformly accelerated motion (CA) model, the control quantity of a pan-tilt is designed according to the coordinates, estimated through modeling, of the target, and accordingly tracking instantaneity and smoothness of the pan-tilt camera are guaranteed.
Owner:SUN YAT SEN UNIV

Mechanical arm operation control system based on PyQt

A mechanical arm operation control system based on PyQt mainly comprises a human-computer interaction interface module, an upper computer main control module, a simulation and control module, a trajectory optimizing module and a USB module. The control system is the mechanical arm control system established based on PyQt-friendly GUI programming framework, can complete basic operation of a mechanical arm and has the functions of simulation and online teaching, multi-parameter real-time displaying and the like, a user downloads upper computer software of the control system from the Windows operation system and installs the upper computer software, relevant parameters of movement of the mechanical arm are obtained in real time through the USB module and are sent to the trajectory optimizingmodule after being subjected to quantification treatment, the trajectory optimizing module optimizes the operation trajectory according to the positive and athwart kinematics formula and the Cartesiantrajectory planning algorithm, the simulation and control module completes the simulation function according to the optimized operation trajectory, and the human-computer interaction interface moduledisplays various control buttons and the parameters of the mechanical arm for the user. By means of the mechanical arm operation control system based on PyQt, the function of a mechanical arm controller is greatly extended, and the human-computer interaction performance of the controller is improved at the same time.
Owner:ZHEJIANG UNIV OF TECH

Combination control system for integration electric power steering and active steering

The invention discloses a combination control system for integration electric power steering and active steering. The combination control system for integration electric power steering and active steering comprises an active steering control system, an electric power steering control system, an adjustment control system based on yaw velocity and an adjustment control system based on steering wheel moment, the active steering control system and the electric power steering control system are respectively connected with a vehicle speed sensor and a steering wheel angle sensor for calculating and processing the inputted vehicle speed and steering wheel angle and outputting the total front wheel angle control signal to the total system for steering the front wheel actively; the adjustment control system based on yaw velocity is used for adjusting the obtained yaw velocity value for having feedback to the active steering control system for amending the front wheel angle control signal; the adjustment control system based on steering wheel moment is used for adjusting the obtained steering wheel moment for having feedback to the electric power steering control system for amending the outputted front wheel angle control signal.
Owner:GUANGDONG POLYTECHNIC NORMAL UNIV

System for feeding coal mine solid filling material

InactiveCN102889097AImprove delivery capabilitiesAvoid cloggingMaterial fill-upFilling materialsClosed chamber
The invention relates to a system for feeding a coal mine solid filling material. The system comprises a filling control chamber, a gangue material bin, a coal ash material bin, a feeding pipe, an underground closed chamber, an impact resistance buffering device, an underground material bin and an underground conveying system, wherein the impact resistance buffering device is positioned at the bottom of the underground closed chamber; the feeding pipe is connected with the underground material bin through the underground closed chamber; the underground material bin is connected with the underground conveying system; the underground conveying system comprises a conveying passage and a conveyer; the conveyer is connected to a filling point; the feeding pipe consists of a protection hole wall steel pipe and a double-layer anti-abrasion pipe; a ceramic anti-abrasion pipe is sleeved on a shrinkage wall at the bottom of the underground material bin; and an outwards discharging type air guide hose is arranged at the upper opening of the underground material bin. According to the system, a large-aperture perpendicular feeding pipe is used for feeding the material, so that the feeding capacity of the filling material is improved, and a filling effect and the safety are improved; by the umbrella-shaped impact resistance buffering device, falling impact force of the filling material can be relieved; the compactness of the filling material in the bin can be reduced; and the bins can be prevented from being plugged.
Owner:HEBEI COAL SCI RES INST

Paper making material, preparation method and paper making method of environment-friendly synthetic paper

The invention relates to a paper making material, a preparation method and a paper making method of environment-friendly synthetic paper. The material comprises modified mineral fiber, thermoplastic starch, cellulose derivative, compatilizer, auxiliary components and the like, wherein the average particle diameter of the modified mineral fiber is 5-10 micrometers, the ratio of the length of the modified mineral fiber to the diameter of the modified mineral fiber is 8-15:1, and the modified mineral fiber is treated by fibrosis ultrafine grinding and surface recombination modification; the thermoplastic starch is formed by performing micronization and plasticization modification on norm starch; and the auxiliary components comprise lubricant and colorant. The paper making material is prepared by sequentially mixing the raw material components fully and then extruding and granulating the mixture by a screw extruder at 60-180 DEG C. According to the plastic process mode, the material can be treated by blow molding through a calender or a paper film machine for carrying out two-way stretch to prepare corresponding paper products. The paper making material can overcome the defects of the current synthetic paper and can be widely applied to the fields of commercial printing, publications, office paper, packing and the like, and the processing procedure of making paper by using plastic processing equipment has environmental protection and low cost.
Owner:CHENDU NEW KELI CHEM SCI CO LTD

High-precision electric field driven spray deposition 3D printer and working method thereof

The invention discloses a high-precision electric field driven spray deposition 3D printer and a working method thereof, and solves the problems of a traditional 3D printer on multiple aspects of resolution, stability and controllability; high-precision printing of multilayer structures can be realized; the printing process is observed and monitored in real time; and high-precision pattern printing is performed on insulation substrates through electric conducting materials. The high-precision electric field driven spray deposition 3D printer comprises a mounting baseplate; a Y-axle worktable is arranged on the mounting baseplate; a vacuum absorption platform is fixed on the Y-axle worktable; a printing substrate is absorbed on the vacuum absorption platform; a printing nozzle and a vertical observation camera are correspondingly arranged above the printing substrate, and are connected to a Z-axle worktable; the Z-axle worktable is fixed on an X-axle worktable; a squint observation camera is correspondingly arranged on one side of the printing nozzle; an LED light source and a far infrared curing light source are correspondingly arranged on the other side of the printing nozzle; theprinting nozzle communicates with a storage bottle; and the storage bottle is arranged on a lifting table.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
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