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oe1(光电查) - 科学论文

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出版时间
  • 2018
研究主题
  • MPPT
  • photovoltaic (PV) power systems
  • Induction motor
  • three-phase four switch inverter
  • two-inductor boost converter
应用领域
  • Electrical Engineering and Automation
机构单位
  • Sree Buddha College of Engineering
149 条数据
?? 中文（中国） ▾

  • [IEEE 2019 IEEE 4th International Future Energy Electronics Conference (IFEEC) - Singapore, Singapore (2019.11.25-2019.11.28)] 2019 IEEE 4th International Future Energy Electronics Conference (IFEEC) - Solar Photovoltaics Based Modified Power Quality Conditioner

    摘要： This paper presents a new methodology to determine the position of a magnetically guided robot (MGR) in horizontal planes using magnetic ?ux sensors. This position determination methodology can be used independently as well as in collaboration with optical sensors in the case of the optical blockage. A combination of linear Hall-effect sensors (two sensors for each axis of motion) was employed to measure the magnetic ?ux in the MGR’s working space. A con?guration of several electromagnets was used as a source of magnetic ?eld, and an analytical model of the system is developed. The MGR’s position was determined based on the polynomial relation between the Hall-effect sensors’ output and the location of the minimum magnetic potential energy point in horizontal planes. Using the cross-validation method, it was found that a fourth-order polynomial model could accurately predict the MGR’s position. Experiments were conducted on a horizontal plane to validate the performance of position estimation using the magnetic ?ux sensing method. The accuracy of the position determination method was 0.4-mm root-mean-square errors in both the x- and y-direction over 8 × 8 mm2 working area. This paper also experimentally validates a combined optical-magnetic position determination technique for the motion control of a magnetically guided robot in optical blockage conditions as unknown environment that can be used as a promising replacement of X-ray and ultrasound techniques.

    关键词： magnetic ?eld analysis,switch control,magnetic levitation,Dual-axial motion,hall-effect sensor

    更新于2025-09-16 10:30:52

  • [IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Non-volatile silicon photonic devices enabled by phase change material

    摘要： We review our recent research progress on silicon-Ge2Sb2Te5 hybrid photonic devices. The optical transmission can be varied by 20 dB using micron-length GST. The inherent "self-holding" feature of GST make it attractive for low-power applications.

    关键词： silicon photonics,optical memory,microring resonator,optical switch

    更新于2025-09-16 10:30:52

  • Fiber Laser || Passive Q-switched and Mode-locked Fiber Lasers Using Carbon-based Saturable Absorbers

    摘要： This chapter aims to familiarize readers with general knowledge of passive Q-switched and mode-locked fiber lasers. It emphasizes on carbon-based saturable absorbers, namely graphene and carbon nanotubes (CNTs); their unique electronic band structures and optical characteristics. The methods of incorporating these carbon-based saturable absorbers into fiber laser cavity will also be discussed. Lastly, several examples of experiments where carbon-based saturable absorbers were used in generating passive Q-switched and mode-locked fiber lasers are demonstrated.

    关键词： passive Q-switch,graphene,carbon nanotube,Fiber laser,passive mode-lock

    更新于2025-09-16 10:30:52

  • Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4??4 silicon optical switch

    摘要： We propose a compact polarization diversity circuit for a silicon waveguide device. It consists of silica waveguides and photonic crystal waveplates, and can convert input light with various polarization states into two output light signals with the same polarization. Setting these circuits at the front and rear of two silicon optical switches, the polarization dependence in the switch can be dramatically suppressed. We fabricated polarization diversity circuits for a 4×4 silicon optical switch and realized a polarization insensitive 4×4 optical switch. The polarization dependent loss was reduced to 1.1 dB and the polarization dependent crosstalk was less than ?17 dB.

    关键词： silicon photonics,polarization diversity circuit,optical switch

    更新于2025-09-16 10:30:52

  • [ACM Press the 2nd International Conference - Sydney, NSW, Australia (2018.10.06-2018.10.08)] Proceedings of the 2nd International Conference on Graphics and Signal Processing - ICGSP'18 - Development of Communication Aid Device for Disabled Persons Using Corneal Surface Reflection Image

    摘要： Improving quality of life (QOL) has become an important issue for patients with neurological diseases such as ALS (amyotrophic lateral sclerosis) and SMA (spinal atrophy). At the same time, it is indispensable to secure a communication device that displays its own intention, and various interfaces have been proposed. In this research, we developed a glasses-type switching wearable device focusing on eyeball movement. Here, images around the eyeball were obtained by USB-camera equipped with infrared LEDs, and pupils were extracted by Hough transform procedure. Furthermore, in order to apply a communication aid operation, a detection model of the line-of-sight direction was constructed by acquiring the coordinates of the cornea surface reflection image.

    关键词： Image processing,Infrared camera,Eye movement,Non-contact switch

    更新于2025-09-16 10:30:52

  • Maximal entanglement and switch squeezing with atom coupled to cavity field and graphene membrane

    摘要： In this paper, we investigate the entanglement and squeezing dynamics of the system consisting of an atom coupled to a cavity field and the graphene membrane using dressed states. The effect of the atomic coherent angle on the time evolution of the entanglement and the quadrature squeezing is discussed. We show that the maximally entangled state between the atom and the mechanical resonator can be created. It is found that the entanglement between the atom and the cavity field increases with the increases in the coherent angle. We demonstrate how to switch from no squeezing to large squeezing by manipulating the initial state of an atom. Moreover, the periodic phonon field squeezed state with long time and high degree can be generated, which has a potential application in the field of high-precision measurement and quantum information processing.

    关键词： Quadrature squeezing,Graphene,Entanglement,Switch

    更新于2025-09-16 10:30:52

  • An isolated single-switch high step-up DC/DC converter with three-winding transformer for solar photovoltaic applications

    摘要： An isolated single-switch high step-up DC/DC converter for solar photovoltaic applications is presented in this paper. The proposed isolated converter consists of a single switch, two voltage doubler circuits and a three-winding transformer. The four capacitors in the voltage doubler circuits are charged in parallel and are discharged in series by the secondary and tertiary winding of the three-winding transformer to attain a high step-up voltage gain. In addition, the voltage doubler circuits absorb energy in parallel, which, in turn, signi?cantly alleviates the voltage stress on the switch with low turns ratio and low duty cycle. The converter operation principle and steady-state analysis of the isolated high gain converter for continuous conduction mode are presented in detail. Laboratory tests and simulation using MATLAB/Simulink are carried out with a prototype of 80 W converter. The predicted and test results establish a close agreement between the validity of the analysis and the viability of the proposed circuit.

    关键词： Voltage doubler circuit,Single-switch isolated converter,Three-winding transformer,High-voltage gain

    更新于2025-09-16 10:30:52

  • All-Optical Wavelength Conversion in an InP Photonic Integrated Turbo-Switch

    摘要： We experimentally demonstrate all-optical wavelength conversion of 56 Gb/s non-return-to-zero (NRZ) signals in an Indium Phosphide (InP) photonic integrated circuit implementing a turbo-switch. The circuit consists of two cascaded semiconductor optical amplifiers (SOAs) with a bandpass filter in between. In this configuration, cross gain modulation (XGM) between a modulated input signal and a continuous wave (CW) light in the first SOA allows to generate a wavelength converted copy of the input signal, while the second SOA, fed by the probe signal selected by the filter, ensures a fast gain recovery. Operations in down- and up-conversion are shown by ER and BER measurements, demonstrating the effectiveness of the photonic integrated circuit (PIC).

    关键词： all-optical wavelength conversion,semiconductor optical amplifiers,photonic integrated circuits,turbo-switch,Integrated optics

    更新于2025-09-12 10:27:22

  • [IEEE 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Singapore, Singapore (2019.8.28-2019.8.30)] 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Non-Volatile Indium Tin Oxide Electro-Optic Switch

    摘要： The abstract of the paper is not provided in the given text.

    关键词： silicon photonics,electro-optic switch,indium tin oxide,non-volatile

    更新于2025-09-12 10:27:22

  • A graphene quantum dots-Pb2+ based fluorescent switch for selective and sensitive determination of D-penicillamine

    摘要： Taking consideration of metal-induced fluorescence quenching and excellent coordination effect of D-penicillamine (D-PA), a graphene quantum dots (GQDs)-based fluorescent switch for D-PA detection was designed and established firstly with the help of lead ions. GQDs obtained from citric acids made them rich in carboxyl and hydroxyl groups, giving GQDs the ability to combine with lead ions. As anticipated, the fluorescence intensity was quenched by Pb2+ through electron transfer process. Further, the addition of D-PA effectively recovered the fluorescence due to the departure of Pb2+ from GQDs aroused by the strong coordination between D-PA and Pb2+. Thus, a fluorescent switch was activated for D-PA detection. The fluorescence recovery efficiencies were found to be proportional to the concentration of D-PA in the range of 0.6–50 μmol L-1 and the detection limit was 0.47 μmol L-1. The real sample detection was performed in human urea sample and satisfactory recoveries of 96.84%-102.13% were obtained. The GQDs-Pb2+ based fluorescent switch sensing method was firstly established with low detection limit and wide linear range, making it a supplement and improvement for D-PA detection.

    关键词： lead ions,graphene quantum dots,D-penicillamine,fluorescent switch

    更新于2025-09-12 10:27:22