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We propose a single-chip three-dimensional (3D) electric field microsensor with advantages of small size and high integration. Three orthogonal sensing axes are placed in one chip, in which one sensing element is set in the middle to detect the Z-axis electrostatic field component, and two pairs of sensing elements are designed into the same structure and cross-like arranged to measure X-axis and...
This paper proposes an electric field microsensor with metal-silicon structure. For the first time, metal materials are used as a mask layer in the fabrication process as well as a structure layer and bonding pads of this electric field microsensor. With less masks used, this fabrication process is simpler than the common process. Moreover, the metal materials can protect the top edge of the structure...
UHVDC(ultra high voltage direct current) is an important method for State Grid Corporation of China to achieve inter-regional long-distance power transmission. ± 1600kV ultra high voltage DC generator is an important equipment to provide high voltage DC test voltage, mainly used for testing the DC electrical equipment. In order to guarantee the safe operation of DC transmission equipment, Using electric...
The existence of the particles has a critical effect on the insulation failures of gas insulated systems. This paper presents the experimental study on the lifting electric field of spherical particles under the different gas pressures in a uniform electric field between two parallel electrodes. The electrode gap was 10 mm. Three sizes of the spherical particles were used. We carried out the experiments...
The paper presents theoretical aspects of calculation of the efficiency of air cleaning electrostatic filter (ESF) used for removal of fine-dispersed dust, depending on the design of systems of collecting electrodes and their materials. The obtained analytical expressions for the calculation of the degree of cleaning, allow determining constructive and technological parameters providing the required...
This paper presents a novel atmospheric electric field sensor based on high sensitivity resonant MEMS (microelectromechanical systems) electric field sense chips, which resolves the problems of motor wear, high power consumption and failure rate of the conventional electric field mill. The chip was fabricated in a commercial SOIMUMPS process. The sensor overall structure scheme was proposed and the...
A system which consists of plan-parallel electrodes placed at the surface of a cylinder, for high homogeneity electric field generation, is observed. In order to investigate an influence of shape and volume of a foreign object to the obtained field's homogeneity, the object is modelled as a conducting cylindrical electrode. The electrode placed in the way that the central system axis of the body coincides...
Electroporation represents one of the techniques used for cell research. By membrane permeabilization, biological samples can be introduced into the cells or intercellular content is released for further analysis providing information for diagnosis and treatment. This techniques is achieved in microfluidic systems with microelectrodes that induce a high electric field in the vicinity of cells to generate...
Tribo-electrostatic separation of mm-size granular insulating materials is a process widely used in plastics recycling industry. However, the separation of micronized plastics is still inefficient because the adhesion and aerodynamic forces of such particles are most often stronger than the electrostatic forces. The aim of this paper is an experimental investigation of a new separation process for...
Tribo-electrostatic separation of mm-size granular plastics mixtures is widely used in recycling industry. However, electrostatic separation of micronized plastics is still inefficient since the adhesion and aerodynamic forces surpass the electric force. The aim of this paper is to optimize a new separation process for mixed fine granular plastics based on a fluidized bed tribocharging system. A pair...
This study was undertaken to model the tomato seed germination. Tomato seeds were subjected to electrostatic field treatments. It was found that its germination was sensitive to electrostatic field applied. The voltage gradient of 2 kV/mm for 20 second duration was found best with 100% germination in comparison with 92% germination for untreated. The relationship between seed germination and voltage...
Gas insulated systems, have proven to be reliable for many years. But despite of a high availability some defects, in particular free moving particles can be very critical. Contamination with particles can result from mechanical abrasion or due to vibrations as well as the enclosures damages during the assembly. A further aspect is that power transmission with DC is getting more important. Therefore...
Electric field Assisted Capillarity (EFAC) is a novel method for the fabrication of hollow microstructures in polymers. It involves both electrostatic and multiphase fluid dynamics modelling with special attention paid to surface tension due to the large capillary forces involved. This presents several challenges in the modelling, firstly due to the small scale involved (Domain sizes of 10-300 micron)...
This paper presents a 3D analysis of the electromechanics for a conducting prolate spheroid in contact with a grounded plane under an electric field for various tilt angles between the spheroid and the plane. We use the method of multipole images and multipole re-expansion in the prolate spheroidal coordinates for the electric field calculation. The electrostatic force and torque are determined from...
We have studied the influence of electric field on plant growth. In previous papers, we reported that the D.C. electric field increases the seed germination rate, weight and length of daikon radish. We also obtain the similar effects for thale cress. It is reasonable to expect that there is an optimum intensity of D.C. electric field for plant growth improvement. As the first step to seek out the...
A new direct method for calculating the electrostatic force of electroadhesive robots generated by interdigital electrodes is presented. Here, series expansion is employed to express the spatial potential, and point matching method is used in dealing with some boundary conditions. The attraction force is calculated using the Maxwell stress tensor formula. The accuracy of this method is verified through...
this paper proposed a new structure of moving-electrode type electric field and selected three kinds of typical metallurgical dusts to carry out characteristic analysis and performance experiments in it and traditional fixed electric field respectively. The results showed that lateral moving-electrode type electric field(LMEF) has superior performance on collecting fine particles but limited effect...
Lateral moving-electrode type electric field (LMEF) was a new upgrading technique for electrostatic precipitator (ESP) and obtained excellent effect in application for its advanced mechanism, feasibility and economic. Modeling on the ESP of Hebei Iron &Steel Group, this paper has numerically simulated the effect of LMEF on resistance and airflow distribution of the ESP. The results indicated that...
Body area communication could be a promising solution of next generation wearable communication networks for pervasive computing. Frequency characteristic of body area communication channel based on quasi-electrostatic field was studied in this paper. From the viewpoint of relaxation time of electrostatic equilibrium in human body inductive electrification, the relationship between induced charge...
Electrostatic human body detector is a detector which obtain target information through catching the electrostatic field of the target. It play an important role in the human body detection technology. This paper focused on using dielectrophoresis theory to detect the coupling heart electric field between the operator and the detected living human, while analyzing the electrorotation electric field...
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