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2012 International Symposium on Computer, Consumer and Control, IS3C 2012

作者： Cheng, Ching-Hwa Tung, Chiou-Kou Department of Electronic Engineering Feng Chia University TaiChung Taiwan Ph.D. Program in Electrical and Communications Engineering Feng Chia University Taichung Taiwan

ISBN: (纸本)9780769546551

In recent years, many research results have discussed the mixed static-domino high-speed circuit. However, most research neglects to discuss how to implement their results. Silicon Intellectual Property plays very important roles in the design of current complex integrated circuits. In this paper, we construct a new pipeline mixed static-domino high-speed circuit synthesized methodology. The cell-based automatic design flow takes high performance, low power, and skew tolerance issues into consideration. Moreover, the new domino and conventional static cell libraries are combined to synthesize a pipeline mixed static-domino circuit. The mixed static-domino circuit partition, synthesis, and optimization techniques are all adopted in this circuit synthesizer. In this paper, we aim to discuss how to partition and synthesize the circuit into static and domino circuit parts, which can adjust the circuit delay time, power consumption within this synthesis flow. Finally, several high-speed with low-power mixed experimental circuits are demonstrated. © 2012 IEEE.

关键词： delay circuits

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A panoramic stitching vision performance improvement technique for Minimally Invasive Surgery 5

A panoramic stitching vision performance improvement techniq...

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5th International Symposium on Next-Generation Electronics, ISNE 2016

作者： Kim, dinh-Thai Cheng, Ching-Hwa Ph.D. Program of Electrical and Communications Engineering Feng Chia University Taichung Taiwan Department of Electronic Engineering Feng Chia University Taichung Taiwan

ISBN: (纸本)9781509024391

Minimally Invasive Surgery (MIS) is a current prevalent technique for surgical operations. Compared with traditional surgical methods, MIS can reduce the post-surgical recovery time, as well as the costs and pain patients endure as a result of surgery. It is therefore of interest to both doctors and patients. The major problem of MIS is there being a narrow field of vision. We have developed and validated a MIS Panoramic Endoscope (MISPE) [4] to provide doctors with broad fields of view. MISPE features a combination of image overlapping and image stitching. The panoramic image apparatus has two side-by-side endoscopic lenses that provide wide-angle inputs for image stitching. MISPE can provide doctors with panoramic images, so that doctors can easily discriminate the organ's positions between surgical operations. The two issues of concern of MISPE are the quality and speed of image stitching. However, the image stitching results of MISPE cannot be obtained by using the conventional SIFT[1], SURF[2], or ORB[3] algorithms. Therefore, this paper proposes few novel techniques to improve the image stitching performance of MISPE. Experimental results show that MISPE can enhance the image size by up to 150%. We also obtained 2X performance improvement in comparison with the conventional techniques. © 2016 IEEE.

关键词： Endoscopy

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Real-time simulation of a 3-leg 6-dOF parallel manipulator based on RT-Linux operation system

Real-time simulation of a 3-leg 6-DOF parallel manipulator b...

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2010 IEEE International Conference on Robotics, Automation and Mechatronics, RAM 2010

作者： Peng, Chih-Cheng Hwang, Thong-Shing Chang, Ching-Yi Wu, Yao-Ting Wu, Sang-Hugh Ph.D. Program in the Graduate Institute of Electrical and Communications Engineering Feng Chia University Taiwan Department of Automatic Control Engineering Feng Chia University Taiwan

ISBN: (纸本)9781424465033

The real-time multi-task simulation of a 3-leg 6-dOF high performance platform system based on RT-Linux operation system is presented in this paper. The new architecture is setup by three extensible legs sliding on three linear slide-rail each actuated by a synchronous linear servo motor. The extensible legs are actuated by inductive AC servo motors. In the meantime, the inverse and forward kinematical equations describing the motion of the platform system are derived. This kind of architecture using the hybrid (linear and AC) motors yields high performance of motions, especially in speed and working space. The novel result of maximal working angles is the significant contribution of this architecture. The platform system is operated in the RT-Linux real-time multi-task executive environment, which is superior to windows, including: (a) RT-Linux real-time is hard real-time, (b) RT-Linux real-time operation system is free, (c) Multi-task can be scheduled by the optimum preemptive static scheduling algorithm. We have demonstrated the dynamic behavior of platform in the RT-Linux window and the OpenGL 3d/VR multi-medium. ©2010 IEEE.

关键词： Application programming interfaces (API)

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Root cause analysis and defect ground effect of EMI problem for power electronics

Root cause analysis and defect ground effect of EMI problem ...

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2019 Joint International Symposium on Electromagnetic Compatibility, Sapporo and Asia-Pacific International Symposium on Electromagnetic Compatibility, EMC Sapporo/APEMC 2019

作者： Lin, Han-Nien Tseng, Wei-ding Wu, Cheng-Hau Yeh, Ting-Hao Ho, Tzu-Hao Feng Chia University Department of Communications Engineering Taichung City Taiwan Ansys Taiwan Taiwan Feng Chia University Ph.D. Program of Electrical and Communications Engineering Taichung City Taiwan

ISBN: (纸本)9784885523229

The dC-dC converter is a crucial component of electronic modules or systems, and thus making electromagnetic interference issue essential. Even though power IC manufacturer often provides useful PCB design guidelines, but power electronic engineer sometimes ignores the design rules because of his own application concerned or cost issue. This usually leads the converter to a poor EMI performance in the first time, thus requiring additional engineering resources, greater time to market, as well as higher EMI filter costs to comply with related EMI regulations. In this paper, we'll analyze the root cause of EMI problem on a dC-dC converter module built with single layer-double side PCB, and point out some factors of PCB ground design that will affect the EMI performance. Since there is no complete pair for power-ground plane, the plane resonance issue will not be discussed in this paper. © 2019 The Institute of Electronics, Information and Communication Engineer.

关键词： Power electronics

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Boost dC-dC converter with regenerative snubber

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Energy Reports 2024年 12卷 798-819页

作者： Yau, Yeu-Torng Department of Ph.D. Program Prospective Technology of Electrical Engineering and Computer Science National Chin-Yi University of Technology Taichung Taiwan Department of Electrical Engineering National Chin-Yi University of Technology Taichung Taiwan

To accommodate the wide range of input voltages supplied by redundant batteries and ensure an adequate hold-up time for communication systems during utility power failures, power supplies used in 5 G base stations typically include a front-end boost converter as the first stage and a second-stage isolated converter. In this paper, a new topology for a regenerative snubber in boost converters is proposed. Compared to traditional active or passive snubber topologies, the proposed snubber offers the advantages of having fewer components and occupying less space. Moreover, it does not require additional active devices and can be driven by widely-used commercial PWM control integrated circuits, achieving a higher level of cost-effectiveness and offering increased industrial applications. The final prototype of a power supply for a networking switch hub (as used in 5 G base stations) is fabricated to demonstrate the feasibility of the proposed method. © 2024 The Authors

关键词： Topology

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Energy-efficient and Accurate Object detection design on an FPGA Platform

Energy-efficient and Accurate Object Detection Design on an ...

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2022 IET International Conference on engineering Technologies and Applications, IET-ICETA 2022

作者： Chen, Kuan-Hung Su, Chun-Wei Wang, Jen-He Feng Chia University Department of Electronic Engineering Taichung Taiwan PH.D. Program of Electronical and Communications Engineering Department of Electronic Engineer

ISBN: (数字)9781665491389

ISBN: (纸本)9781665491389

With the innovation of hardware equipment, the development of artificial intelligence has broken through the limitations of the past. Neural networks have been continuously deepened to improve the accuracy of detection, so that the parameters have increased with a direct proportional rate. In this way, however, high energy consumption has been induced which obstacles the deployment of AI algorithms on portable devices. Therefore, the design of neural network must consider not only detection accuracy but also energy efficiency. In this paper, we analyzed energy consumption, detection accuracy and execution speed of our neural network model as well as the state-of-the-art models based on an FPGA platform called ZCU-102. We adopt the performance index from Low Power Computer Vision (LPCV) challenge which considers power dissipation, mean Average Precision (mAP) and Frames Per Second (FPS) at the same time to evaluate these models in an overall point of view. Agilev4 can achieve 59.9% of mAP@50 on MS COCO test-dev2017 datasets. If the input frame resolution is turned into 416 × 416, the processing frame rate can reach 20.7 FPS on ZCU-102. Compared with the state-of-the-art models, the LPCV score of Agilev4-416 is 1475. S which is 1.56 times of that of YOLOv4-416. © 2022 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Micro-Cantilever Array With Electroplating Tin Bumps for Flip-Chip Bonding Technology

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IEEE Transactions on Components, Packaging and Manufacturing Technology 2023年第12期13卷 2040-2045页

作者： Hu, Zihsong Liou, Chengshiun Tsou, Chingfu Feng Chia University Department of Automatic Control Engineering Taichung40724 Taiwan Institute of Nano Engineering and Microsystems National Tsing Hua University Hsinchu30013 Taiwan Feng Chia University Doctorate Degree of the Ph.D. Program of Electrical and Communications Engineering Taichung40724 Taiwan

A Nickel (Ni) microcantilever beam array with tin (Sn) solder bumps has been designed for flip-chip bonding with high-density electrodes. Micro-electro-mechanical system (MEMS) technology and the micro-electroplating process were used in the fabrication process. Utilizing the out-of-plane deformation of the suspended microcantilever beam, the satisfied heights partially compensate the substrate curvature to ensure a high flip-chip bonding yield, thus, improving package quality in terms of electrical connections. To demonstrate this technique, this study developed a flip-chip carrier for a typical micro-LEd array with a beam length of 70~ μm and a bump height of 2~ μm. The measurement results revealed that the displacement of the microcantilever beam was approximately 0.8~ μm when a 500~ μN force was applied on top of the tin bump. When a glass substrate directly mounts to the flip-chip carrier through the tin bump at a heat reflow of 270 °C, most of the tin bumps successfully melt and solidify, which results in good bonding performance. These results revealed that the proposed approach could be applied to the wafer-level packaging process with high-density ball grid array electrodes. © 2011-2012 IEEE.

关键词： Flip chip devices

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Gain enhancement of a circularly polarized patch antenna using a suspended patch

Gain enhancement of a circularly polarized patch antenna usi...

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2011 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference, CSQRWC 2011

作者： Kuo, Wei-Ching Hung, Tian-Fu Tseng, Ching-Hung deng, Sheng-Ming Tsai, Ching-Long Bor, Sheau-Shong Sun, Hai-Tao Department of Electrical Engineering Feng-Chia University Taichung Taiwan Ph.D. Program in Electrical and Communications Engineering Feng-Chia University Taichung Taiwan Department of Electronic Engineering Ming-Chuan University Taipei Taiwan

ISBN: (纸本)9781424497904

A circularly polarized (CP) patch antenna with gain enhancement is presented. This paper provides a technique to increase the CP gain of an antenna without changing its original configuration. A gain enhancement of 1.7 dBic is achieved by an additional suspended patch. First, we design a CP patch antenna, which works in the band of Wireless Local Area Network (WLAN) with an antenna gain of 10 dBic. Second, adding a suspended patch along the z-axis to the original antenna which the gain enhancement of the modified structure can be improved. The measured and simulated results are equivalent agreement, and they both show that the antenna gain is indeed improved about 1.7 dBic by adding a suspended patch. © 2011 IEEE.

关键词： Microstrip antennas

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Hydrogen sensor based on air-gap long period fiber gratings

Hydrogen sensor based on air-gap long period fiber gratings

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16th Opto-Electronics and communications Conference, OECC 2011

作者： Wu, Pei-Ping Lin, Guei-Ru Wang, Yu-Li Fu, Ming-Yue Liu, Wen-Fung Sheng, Hao-Jan Department of Electrical Engineering Feng-Chia University Taichung 40724 Taiwan Ph.D. Program in Electrical and Communications Engineering Feng-Chia University Taichung Taiwan Department of Avionics Engineering Air Force Academy Kaohsiung Taiwan

The hydrogen gas sensor based on air-gap long period fiber grating (AG-LPG) with the coated Pd thin-film is experimentally demonstrated with the sensitivity of 0.165 nm/% and can detect the minimum concentration of 60... 详细信息

ISBN: (纸本)9781612842882

关键词： diffraction gratings

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Visual Field Examination Technology Based on Semi-transparent Elliptical Mirror 6

Visual Field Examination Technology Based on Semi-transparen...

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6th IEEE Eurasian Conference on Educational Innovation, ECEI 2023

作者： Chang, Chao-Kai Chiang, Chun-Yu Yeh, Feng-Ming Lee, Chi-Hung Tien, Chuen-Lin Chen, der-Chin Department of Optometry Yuanpei University of Medical Technology Hsinchu Taiwan Ph.D. Program of Electrical and Communications Engineering Feng Chia University Taichung Taiwan Department of Electrical Engineering Feng Chia University Taichung Taiwan

ISBN: (纸本)9798350334289

In this study, the human visual field test technology is established by using an optoelectrical system consisting of a translucent ellipsoid, an area light source, and a landscape scene with an indicator. during the test, the subjects stared at the indicator directly in front of them with one eye and kept their eyeballs still, scanning the light strip with peripheral vision and using the mouse button plus the playback program to record the start and end positions of the scanning light strip in the landscape scene. This method is tested subjectively, and the subject needs to respond during the test. Therefore, before the test, the subject needs to understand the test process and be trained in advance to improve the exam accuracy. In the experiment, fifteen subjects with normal vision and no eye disease were selected. Their visual fields were confirmed normal after a preliminary assessment. The test results showed that the subjects' eyes were within the normal visual field, indicating that this method was feasible. In this research, a digital optical platform for the near visual field is proposed to establish an optoelectric visual field measurement technology. The proposed method is characterized by small size, rapid operation, and easy portability. With the digital LCd and visual imaging technology, both dynamic and static visual fields can be tested. The test data on the eyes' upper, lower, nasal, and temporal sides were consistent with the normal visual field. This shows that this method is feasible and worthy of promotion in the optometry industry. © 2023 IEEE.

关键词： Light sources

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