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公开(公告)号：US20240168721A1
公开(公告)日：2024-05-23
申请号：US18403575
申请日：2024-01-03
Inventor： Bo XU , Libing Bai , Xiaowei Luo , Jia Zhao , Yuhua Cheng , Hang Geng , Kai Chen , Yifan Wang , Gen Qiu
IPC: G06F7/58
CPC classification number: G06F7/582
Abstract: A random transient power test signal generator based on three-dimensional memristive discrete map, which utilizes a three-dimensional parallel bi-memristor Logistic map module to generate two pseudo-random sequences, and based on the sequences, uses two waveform output modules to generate transient voltage and transient current signals respectively, thus the random transient power testing signal is obtained. The map can significantly improve the complexity of chaos and greatly extend its range of chaos. In addition, a performance evaluation shows the map has more robust hyperchaotic behavior in much larger chaos range. Moreover, the random sequences generated by the map module combines with DDS, which can generate a transient power signal with completely random period, starting phase and ending phase. Thus, a stimulated output of the high-precision transient power testing signal with random characteristic is realized, which makes the development and calibration of high-precision measurement of power meters more convenient.
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Patent Agency Ranking
2.发明授权公开(公告)号：US11641457B2
公开(公告)日：2023-05-02
申请号：US17680390
申请日：2022-02-25
Inventor： Chun Yin , Yuhua Cheng , Zeqi Wang , Xutong Tan , Kai Chen , Gen Qiu , Jianhao Luo , Junjie Liu , Zhibo Li , Aolin Yang
IPC: H04N13/15 , H04N13/239 , H04N13/254 , G06T7/33 , H04N13/246
Abstract: A method for high-precision true color three dimensional reconstruction of mechanical component. Firstly performs image acquisition: the left and right high-resolution grayscale cameras are fixed at same height and spaced at certain distance, an optical transmitter fixed between the two grayscale cameras, and low-resolution color camera fixed above optical transmitter, thus images of measured high-precision mechanical component are shot. Then performs image processing: all images are transmitted to a computer, which uses image processing to record surface information of measured high-precision mechanical component in the point cloud by high-precision true color three-dimensional reconstruction, which reflects color texture information of the surface, so as to realize the non-contact high-precision true color three dimensional reconstruction of high-precision mechanical component. The method uses binocular high-precision grayscale cameras instead of binocular color cameras, which broadens the range of capture wavelengths, retains richer texture details of high-precision mechanical component and improves accuracy of measurement.
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公开(公告)号：US11587250B2
公开(公告)日：2023-02-21
申请号：US17401760
申请日：2021-08-13
Inventor： Yuhua Cheng , Chun Yin , Xiao Yang , Kai Chen , Xuegang Huang , Gen Qiu , Yinze Wang
Abstract: The present invention provides a method for quantitatively identifying the defects of large-size composite material based on infrared image sequence, firstly obtaining the overlap area of an infrared splicing image, and dividing the infrared splicing image into three parts according to overlap area: overlap area, reference image area and registration image area, then extracting the defect areas from the infrared splicing image to obtain P defect areas, then obtaining the conversion coordinates of pixels of defect areas according to the three parts of the infrared splicing image, and further obtaining the transient thermal response curves of centroid coordinate and edge point coordinates, finding out the thermal diffusion points from the edge points of defect areas according to a created weight sequence and dynamic distance threshold εttr×dp_max, finally, based on the thermal diffusion points, the accurate identification of quantitative size of defects are completed.
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公开(公告)号：US11036978B2
公开(公告)日：2021-06-15
申请号：US16370202
申请日：2019-03-29
Inventor： Chun Yin , Yuhua Cheng , Ting Xue , Xuegang Huang , Haonan Zhang , Kai Chen , Anhua Shi
Abstract: The present invention provides a method for separating out a defect image from a thermogram sequence based on weighted naive Bayesian classifier and dynamic multi-objective optimization, we find that different kinds of TTRs have big differences in some physical quantities. The present invention extracts these features (physical quantities) and classifies the selected TTRs into K categories based on their feature vectors through a weighted naive Bayesian classifier, which deeply digs the physical meanings contained in each TTR, makes the classification of TTRs more rational, and improves the accuracy of defect image's separation. Meanwhile, the multi-objective function does not only fully consider the similarities between the RTTR and other TTRs in the same category, but also considers the dissimilarities between the RTTR and the TTRs in other categories, thus the RTTR selected is more representative, which guarantees the accuracy of describing the defect outline. And the initial TTR population corresponding to the approximate solution for multi-objective optimization is chosen according to the previous TTR populations, which makes the multi-objective optimization dynamic and reduces its time consumption.
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公开(公告)号：US11486901B2
公开(公告)日：2022-11-01
申请号：US17220160
申请日：2021-04-01
Inventor： Yuhua Cheng , Bo Xu , Kai Chen , Songting Zou , Libing Bai , Hang Geng , Yanjun Yan , Jia Zhao
IPC: G01R13/02
Abstract: A system maps and stores data in digital three-dimensional oscilloscope, wherein an ADC module has four ADC submodules. Four acquired waveform data are sent to an extraction module, and buffered in a FIFO module. When a trigger signal arrives, FIFO module outputs four extracted waveform data to a mapping address calculation module for calculating a mapping address and a RAM serial number for each point data, and the waveform data comparison and control module performs the reading and writing control of the 4×N dual port RAMs. When mapping number reaches a frame number, the RAM array module outputs its waveform probability values to the upper computer module to convert each value into RBG values, and the display module displays the waveforms of input signals of four channels on a screen according the RBG values.
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公开(公告)号：US11994536B2
公开(公告)日：2024-05-28
申请号：US17515987
申请日：2021-11-01
Inventor： Bo Xu , Kai Chen , Libing Bai , Lulu Tian , Hang Geng , Yuhua Cheng , Songting Zou , Jia Zhao , Yanjun Yan , Xiaoyu Huang
CPC classification number: G01R13/403 , G01R13/02 , G01R13/0209
Abstract: The present invention provides a system for data mapping and storing in digital three-dimensional oscilloscope, wherein the fixed coefficients, which are calculated according the parameters and settings of a digital oscilloscope, are stored into a fixed coefficient memory CO RAM, the fixed coefficients are outputted to N fractional operation units through N−1 D flip-flop delay units to multiply with the acquired data x(n) and then be accumulated, thus N fractional calculus results are obtained. In this way, N fractional calculus results can be obtained by performing L/N fractional calculus operations. N fractional calculus results are sent to a signal processing and display module, in which they are converted into a display data through a drawing thread, and the display data are sent to LCD for displaying, thus the fractional calculus operation and display of a input signal in a digital oscilloscope is realized.
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