公开(公告)号：US20240210915A1

公开(公告)日：2024-06-27

申请号：US18583904

申请日：2024-02-22

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Jian GAO ,  Guixin ZHANG ,  Yuheng LUO ,  Lanyu ZHANG ,  Haixiang DENG ,  Yun CHEN ,  Xin CHEN

IPC: G05B19/4103

CPC classification number: G05B19/4103 ,  G05B2219/34169

Abstract: A five-axis linkage synchronous tool path interpolation method and system, which utilizes the strict proportional coefficient relationship between points, control points and parameters on the first-order derivative curve of the spline curve, more accurate tool axis path curve interpolation points from the parameters of the tool tip path curve are calculated. There is no need to calculate the tool axis path curve interpolation points according to interval synchronization. It is not affected by the shape consistency of the tool tip path curve and the tool axis path curve.

公开(公告)号：US20230401730A1

公开(公告)日：2023-12-14

申请号：US18154557

申请日：2023-01-13

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhuojun ZHENG ,  Jian GAO ,  Lanyu ZHANG ,  Haixiang DENG ,  Yun CHEN ,  Xin CHEN

IPC: G06T7/521 ,  G01C3/02

CPC classification number: G06T7/521 ,  G01C3/02 ,  G06T2207/10028

Abstract: A three-dimensional measurement method comprises: converting a total number of levels of sawtooth fringes into a Gray code and acquiring a sawtooth slope coefficient; fusing the coefficient into a sawtooth fringe image to generate a target sawtooth fringe pattern; projecting each target sawtooth fringe pattern to a surface of a to-be-measured object through a projector, and collecting a deformed target sawtooth fringe pattern on the surface through a camera; solving a Gray code of each sawtooth fringe collection pattern at each pixel point according to a differential property of adjacent pixels in each sawtooth fringe collection pattern and solving a fringe level and a wrapped phase at each pixel point; calculating an absolute phase at each pixel point according to the fringe level and the wrapped phase at each pixel point, and reconstructing a three-dimensional point cloud through triangulation ranging to obtain a three-dimensional model of the to-be-measured object.

公开(公告)号：US20230217036A1

公开(公告)日：2023-07-06

申请号：US18065530

申请日：2022-12-13

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Jian GAO ,  Yuanyang WEI ,  Lanyu ZHANG ,  Haixiang DENG ,  Yun CHEN ,  Xin CHEN

IPC: H04N19/513 ,  H04N19/172

CPC classification number: H04N19/513 ,  H04N19/172

Abstract: Disclosed are a plane coding target and an image splicing system and method applying the same. The plane coding target comprises a plurality of coding units distributed in an array, the coding unit comprises one central coding point, a plurality of normal coding points and at least one positioning point, and a positioning point distribution style of the positioning point is used for determining coordinates of the central coding point and the normal coding points in a coding unit coordinate system; and coding numerical value sequences of the coding units are different from each other and unique. The plane coding target can realize large-area coding and positioning functions, and the image splicing system applying the plane coding target can solve the problems of splicing error and error accumulation caused by an identification error of a splicing location, thus realizing large-range, high-precision and short-time two-dimensional image splicing.

公开(公告)号：US20230185262A1

公开(公告)日：2023-06-15

申请号：US17991936

申请日：2022-11-22

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Jian GAO ,  Guixin ZHANG ,  Lanyu ZHANG ,  Haixiang DENG ,  Yun CHEN ,  Yunbo HE ,  Xin CHEN

IPC: G05B19/04 ,  G06F17/16

CPC classification number: G05B19/041 ,  G06F17/16

Abstract: A time optimal speed planning method and system based on constraint classification. The method comprises: reading path information and carrying out curve fitting to obtain a path curve; sampling the path curve, and considering static constraint to obtain a static upper bound value of a speed curve; considering dynamic constraint, and combining the static upper bound value of the speed curve to construct a time optimal speed model; carrying out convex transformation on the time optimal speed model to obtain a convex model; and solving the convex model based on a quadratic sequence planning method to obtain a final speed curve. The system comprises: a path curve module, a static constraint module, a dynamic constraint module, a model transformation module and a solving module.

公开(公告)号：US20230070287A1

公开(公告)日：2023-03-09

申请号：US17988096

申请日：2022-11-16

Applicant: Guangdong University of Technology

Inventor： Jian GAO ,  Yuanyang WEI ,  Lanyu ZHANG ,  Yongbin ZHONG ,  Haixiang DENG ,  Yun CHEN ,  Xin CHEN

IPC: G06T7/70 ,  G06T9/00

Abstract: A real-time pose measurement method of a planar coding target for a vision system. The planar coding target includes a plurality of coding elements, a coding block, a coding template, a minimum identification unit pattern and a coding pattern. Each coding element has a unique coding value, and serial numbers of the coding elements are different from each other. The coding block includes four coding elements that are distributed in the same rectangle ABCD and do not overlap with each other. A center of the coding block is an intersection point O of two diagonals of the rectangle ABCD. A coding value of the coding block is associated with coding values of the four coding elements contained therein.

公开(公告)号：US20210166981A1

公开(公告)日：2021-06-03

申请号：US17037849

申请日：2020-09-30

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Yun CHEN ,  Yao YAO ,  Shuquan DING ,  Junyu LONG ,  Maoxiang HOU ,  Dachuang SHI ,  Xin CHEN ,  Jian GAO ,  Qiang LIU ,  Lanyu ZHANG ,  Yunbo HE ,  Shenghui ZHANG ,  Zhengping WANG

IPC: H01L21/66 ,  B23K26/08 ,  B23K26/06 ,  B23K26/082

Abstract: The disclosure relates to a method for repairing an internal circuit break defect in a chip, including: S1, detecting the defect position of the chip and the type and performance parameters of a filling material; S2, positioning the chip on a two-dimensional motion platform; S3, setting parameters of two beams of laser; adjusting a focal length of the two beams of laser three-dimensional incident angle and a Z axis, so that a focus point of the two beams of laser irradiate any end of the circuit break of the chip; S4, the two-dimensional motion platform drives the chip to move, so that the focus point of the two beams of laser is moved to an other end of the circuit break, and an moving trajectory of the focus point of the two beams of laser feeds through the two ends of the circuit break of the chip.

公开(公告)号：US20210081827A1

公开(公告)日：2021-03-18

申请号：US17088577

申请日：2020-11-03

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Jian GAO ,  Ruirong LUO ,  Lanyu ZHANG ,  Haixiang DENG ,  Xin CHEN

IPC: G06N5/04 ,  G06K9/62 ,  G06T5/00

Abstract: A fast clustering algorithm of kernel fuzzy C-means integrated with spatial constraints, including (1) applying the illumination processing algorithm, the preprocessed image affected by illumination is constructed; (2) After step (1), the original image and preprocessed image are mapped to the feature space using Gaussian kernel to cluster and segment. Providing a defect segmentation method for fluorescent glue which is robust to illumination to process and calculate the illuminated image, so as to complete the detection of foreign matters, bubbles and discoloration defects of fluorescent glue in lighting products. The disclosure provides a fast clustering algorithm of kernel fuzzy C-means integrated with spatial constraints. The image is mapped into the feature space, and the objective function of kernel fuzzy C-means clustering is optimized by using the spatial relationship of pixels, so that the clustering process has segmentation robustness to the gray value change of similar pixels caused by environmental changes.

公开(公告)号：US20200290170A1

公开(公告)日：2020-09-17

申请号：US16814274

申请日：2020-03-10

Applicant: Guangdong University of Technology

Inventor： Sujuan WANG ,  Hailong WANG ,  Xin CHEN ,  Senbin XIA

IPC: B23Q17/20 ,  B23Q17/10 ,  B23Q17/24

Abstract: A method and system for optimal control of ultra-precision cutting. The method for optimal control is based on time-precipitates-temperature characteristics of Al—Mg—Si series aluminum alloy, and includes first determining types of precipitates of machined materials, and establishing a Lifshitz-Slyozov-Wagner (LSW) model of each precipitate. A temperature range is determined corresponding to each precipitate according to the LSW model to obtain a comprehensive temperature range. A relation model is established between cutting parameters and a cutting temperature according to the LSW model. Finally the cutting parameters are optimized according to the comprehensive temperature range and the relation model, so that the cutting temperature is beyond the comprehensive temperature range to inhibit the generation of the precipitates.

公开(公告)号：US20200230644A1

公开(公告)日：2020-07-23

申请号：US16717331

申请日：2019-12-17

Applicant: Guangdong University of Technology

Inventor： Yun CHEN ,  Junyu LONG ,  Shuang ZHOU ,  Xin CHEN ,  Jian GAO ,  Qiang LIU ,  Ching-Ping WONG ,  Shenghui ZHANG

IPC: B05D3/06 ,  B05D1/00 ,  B05D3/04 ,  B23K26/04 ,  B23K26/06 ,  B23K26/08 ,  B23K26/12 ,  B23K26/352 ,  B23K26/359

Abstract: A device for processing microstructure arrays of polystyrene-graphene nanocomposites, including a laser generator, a vacuum chamber, an object stage, an ultraviolet filter and a gas flow control unit. The object stage is detachably fixed to a bottom of the vacuum chamber with a passage that can be opened or closed. The ultraviolet filter is provided in the vacuum chamber. A laser light emitted by the laser generator arrives at the object stage through the ultraviolet filter. The object stage is configured to place a sample to be processed. The gas flow control unit is communicated with the vacuum chamber and is configured to control the flow of the gas entering the vacuum chamber. The vacuum chamber is fixed on a three-axis precision positioning platform via a vacuum chamber clamp. The device disclosed herein aims to solve the existing difficulty in processing microstructure arrays of polystyrene-graphene nanocomposites.

公开(公告)号：US20200065693A1

公开(公告)日：2020-02-27

申请号：US16191967

申请日：2018-11-15

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhijun YANG ,  Youdun BAI ,  Yaobin HE ,  Xin CHEN

IPC: G06N7/00 ,  G06F17/13

Abstract: A control method for converting time-varying system into a time-invariant system, comprises: using (n−1)th to 0th order signals of an nth-order time-varying, system as feedback to set up a closed loop control for the time-varying system; acquiring real-time values of the coefficients in each order of the time-varying system through a sensor, and calculating variations between the real-time values and the initial values of the coefficients in each order through a controller; amplifying and summing the parameters of every order to obtain a measured disturbance; inputting the measured disturbance, a control signal from a controller and an nth-order signal into an extended state observer through to estimate the rest disturbance; summing up the measured and estimated disturbances to obtain total disturbances; and adjusting the above parameters in each order through the controller to convert the time-varying system into the tune-invariant system.