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The trend of development of Gas Insulated System (GIS) recently includes: miniaturization, intelligentization and high reliability. This needs a higher insulation performance of GIS. Free conducting particle in GIS is a main reason that causes the degradation of GIS insulation. Free conducting particle will bring a high risk to GIS insulation when it approaches to the high voltage conductor or reaches...
In this paper, the motion behavior has been analyzed and the effect of particle trap's shape and size on the capture efficiency of particulate traps in DC GIL has been studied. This paper constructs a scale model the actual coaxial cylindrical GIL transmission unit and particle trap, and with the particles charging process in the electric field taken into consideration, the COMSOL multi physics simulation...
This paper presents the fabrication and characterization of a mechanical microswitch structures for the out-of-the plane displacements. The mobile electrode is connected to the anchors through several rectangular hinges fabricated in different geometrical dimensions. The mechanical response of investigated switch structures depends on the number of hinges and their geometrical dimensions. The geometrical...
The correlation between Mechanical stimulation of human body and sEMG signals is discussed. Based on a multi-information sampling system, the mechanical stimulation and sEMG signals of human body can be obtained. The results indicate there is a remarkable relationship between the mechanical stimulation and sEMG signals, and may provide theoretical basis and significative information for finding out...
Inspired from Hogan's myoelectric processor in 1980, this study presents a stochastic sEMG processing method to estimate the muscle activation level for manipulator control. Hogan's previous study showed the feasibility to estimate the muscle activation level with multi-channel sEMG under static force condition. However, it is difficult to continuously estimate muscle activation during dynamic contraction...
Welding is an operation that aims to join two or more pieces, holding that on combination of these parts there will has no discontinuity of physical, chemical and metallurgical properties for its use and performance. This work deals with the modeling of this system. For this, two models are presented: one represents the dynamic of drop formation on electrode tip and the second model represents mass...
We report a flexible self-generated triboelectric microfluidic sensor based on liquid-solid triboelectrification and electrostatic induction mechanism. The flexible microfluidic sensor can be conformally attached on curved surfaces and work under two sensing modes - triboelectric single electrode mode and interdigital (IDT) electrode mode. The microfluidic sensor has linear force sensing range up...
We report a novel microfluidic-based high-throughput electrorotation flow cytometer for label-free single-cell analysis in continuous flows. This is realized by a heterogeneously integrated microfluidic channel with electrodes for high precision 3D single stream focusing and electrorotation of cells in high speed flows. This device provides 4 orders of magnitude higher throughput than prior electrorotation...
We demonstrate fabrication of higher-order nanostructure for molecular sensing using dielectrophoresis-induced aggregation of Au-nanoparticles-decorated polystyrene beads (AuNPs/PS). We are also able to add the specific linker bridges which bind a target molecule. We achieved the in situ highly sensitive surface enhanced Raman Scattering using the higher-order nanostructure.
This work reports the experimental study of the dynamics of micro-droplets composed of two immiscible liquids and their separation into constituent phases in response to electrowetting-on-dielectric (EWOD) digital microfluidics (DMF) actuation. Separating phases of a compound droplet without leaving any residue of one phase to the other is a big challenge but much needed for successful operations...
Modeling the electric field in a matrix of micro-mirrors is presented as the first application of the MEMSALab software package. The latter is dedicated to semi-automated derivation of multiscale models by asymptotic methods and will complement simulation software as finite element software. It is designed according to a principle of reusability which is called the extension-combination method developed...
A parallel dielectrophoretic single particle trap lab-on-a-chip system has been constructed and utilized to characterize the physical, electrical, and biological properties of single particle. We show proof-of-concept for the array of dielectrophoretic single particle trap that captures individual micro-/nano-particles in each trap.
In this work, we infer the influence of pre-stress in the design of a capacitive force/pressure sensor. For this purpose, experimental plans, so-called Designs of Experiments (DoEs), are employed. Based on these designs, not only the influence of design parameters can be inferred, but also a prediction model, which uses the design parameters as predictors, can be determined. Rapid prototyping technologies,...
This paper reports recent progress in modeling and simulation of a one-dimensional Micro-Mirror Array actuated by an electrostatic force. We present results obtained through numerical simulations of a single cell: the analysis and the optimization of the pull-in voltage and the analysis of the bounces of the mirror in contact with the base when it is subjected to a voltage exceeding the pull-in voltage...
This paper presents a double stage FPCB (Flexible Printed Circuit Board) electrostatic parallel plate (DSFP) micromirror. It is designed and fabricated base on mature commercial FPCB processes with low cost. The DSFP micromirror includes a FPCB moving electrode in the middle, two identical FR4 PCB fixed electrodes on both sides and a silicon mirror plate with aluminum coating. Compare with conventional...
In this paper, we develop a tactile and proximity sensor using self-capacitance measurement on the curved surface for human collaboration robot (HCRs). The proposed sensor consists of two measurement electrodes and an elastic body. We produced the prototype sensor using the flexible circuit board. Thus, the sensor can curve in the curved surface. The sensor using self-capacitance measurement can detect...
Vibratory cylinder gyroscope (VCG) is an important type of vibratory gyroscopes with a lot of advantages. Manufacturing errors and material inhomogeneity are regarded as the main cause of the zero bias drift of the VCG. In this paper, the nonlinear vibration of the cylindrical resonator is considered. It is analyzed that the nonlinear vibration can cause extra drift of the VCG's output. Experiments...
Electromyography (EMG) employs widespread usage of rehabilitation robotics. EMG informs about the maximum capabilities of muscles and allows comparisons between different tasks performed. This presents a comparitive study % MVC (Maximum Voluntary Contraction) hand muscles among 30 to 60 years of age group. The movement considered are flexion and extension of elbow and wrist, pronation and supination...
This paper presents an electroactive polymer (EAP) actuator controlled scissor-type gripper (Fig. 1). The EAP actuator is made of ion polymer metal composite (IPMC). By doping Fe2O3 nanoparticles into IPMC, the actuator exhibits larger force output and 2-fold increase of maximum deformation compared to the pure IPMC actuator. Using water retaining poly(N-isopropylacrylamide) (PNIPAAM) made water supply...
In this paper, a MEMs relay for high power application is investigated. This relay has to hold a current of the order of magnitude of the Ampere and is subject to harsh environment such as high temperature or vibrations which can lead to a premature dysfunction. The paper presents an analytical modelling of the relays considering the geometry, the contact resistance and also the effect of vibrations...
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