scholarly journals Resolution-Enhancing Structure for the Electric Field Microsensor Chip

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 936
Author(s):  
Xiaolong Wen ◽  
Pengfei Yang ◽  
Zhouwei Zhang ◽  
Zhaozhi Chu ◽  
Chunrong Peng ◽  
...  
Keyword(s):  
Electric Field ◽  
Metal Plate ◽  
Measuring Error ◽  
Production Lines ◽  
Capacitance Sensor ◽  
Coherent Demodulation ◽  
Ansys Simulation ◽  
Static Monitoring ◽  
Demodulation Method ◽  
Magnification Effect

Electrostatic voltage is a vital parameter in industrial production lines, for reducing electrostatic discharge harms and improving yields. Due to such drawbacks as package shielding and low resolution, previously reported electric field microsensors are still not applicable for industrial static monitoring uses. In this paper, we introduce a newly designed microsensor package structure, which enhances the field strength inside the package cavity remarkably. This magnification effect was studied and optimized by both theoretical calculation and ANSYS simulation. By means of the digital synthesizer and digital coherent demodulation method, the compact signal processing circuit for the packaged microsensor was also developed. The meter prototype was calibrated above a charged metal plate, and the electric field resolution was 5 V/m, while the measuring error was less than 3 V, from −1 kV to 1 kV in a 2 cm distance. The meter was also installed into a production line and showed good consistency with, and better resolution than, a traditional vibratory capacitance sensor.

The Finite Element Analysis of the Large-Scale Converter Transformer Valve Side of the Electric Field

2013 ◽  
Vol 325-326 ◽  
pp. 476-479 ◽  
Author(s):  
Lin Suo Zeng ◽  
Zhe Wu
Keyword(s):  
Finite Element ◽  
Electric Field ◽  
Large Scale ◽  
Calculation Model ◽  
Simulation Software ◽  
Field Calculation ◽  
Element Analysis ◽  
Ansys Simulation ◽  
The Finite Element Analysis ◽  
Electric Field Calculation

This article is based on finite element theory and use ANSYS simulation software to establish electric field calculation model of converter transformer for a ±800kV and make electric field calculation and analysis for valve winding. Converter transformer valve winding contour distribution of electric field have completed in the AC, DC and polarity reversal voltage.

Research on Electric Field Simulation of Ring Capacitance Sensor Based on Finite Element Method

2021 ◽  
Vol 105 ◽  
pp. 221-227
Author(s):  
Hui Ling Wang ◽  
Chun Li Cai
Keyword(s):  
Dielectric Constant ◽  
Finite Element ◽  
Electric Field ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Element Model ◽  
Field Analysis ◽  
Optimal Structure ◽  
Capacitance Sensor ◽  
Finite Element Software

The working principle of ring capacitance sensor is introduced, that is capacitance fringe effect. Finite element model is established through the Hybrid-Trefftz algorithm. Electric field analysis and simulation calculation of different sensor model are done with the finite element software ANSYS, and the optimal structure combination is obtained. And followed the example of optimal structure, the relation of dielectric constant and electric field intensity were given. The result of simulation shows the most direct and the most important two parameters that affect the sensor performance in the design of the ring capacitance sensor are the two electrodes spacing and the length. The dielectric constant of measured medium is smaller, the intensity of electric field intensity is greater. The simulation for subsequent product design has a good theoretical guidance.

Signal Processing Circuit Design Based on SOPC Technology for the Electric Field Type Time Grating Sensors

2014 ◽  
Vol 635-637 ◽  
pp. 755-759
Author(s):  
Fang Yan Zheng ◽  
Zi Ran Chen ◽  
Zhi Cheng Yu
Keyword(s):  
Signal Processing ◽  
Electric Field ◽  
Circuit Design ◽  
Linear Time ◽  
Measuring Error ◽  
Field Type ◽  
Field Programmable ◽  
System On Programmable Chip ◽  
Processing Circuit ◽  
Signal Field

Signal processing circuits are proposed for the electric field type time grating sensors. The proposed design scheme integrates sampling function and processing function into a signal field programmable gate array (FPGA) based on system on programmable chip (SOPC) technology. Employing NiosII technology and adding self-defined instructions improve data processing speed for time grating sensors. The proposed signal processing circuits are simple and stabile. The proposed signal processing circuits are applied to electric field type linear time grating sensors, the experiments results that the peak-to peak measuring error is 0.3um within 200mm without any corrections.

scholarly journals The diffusion of electrons through a slit

1914 ◽  
Vol 90 (615) ◽  
pp. 69-72 ◽  
Keyword(s):  
Differential Equation ◽  
Electric Field ◽  
Simple Form ◽  
Lateral Diffusion ◽  
Metal Plate ◽  
Electric Force ◽  
Narrow Strip ◽  
Air Gaps ◽  
Uniform Rate

In a paper on “The Motion of Electrons in Gases,” by Prof. Townsend and Mr. Tizard* it was shown how, by measuring the lateral diffusion of a stream of electrons in an electric field, it is possible to find k the factor by which the energy of agitation of the electrons exceeds that of the surrounding molecules. The ions come at a uniform rate through a slit S of width 2 a in a large metal plate A, and traverse a distance c in the direction of an electric force Z. The plane of the plate A may be taken as that of xy , the origin of co-ordinates being the centre of the slit which latter is taken parallel to the axis of y . The ions are received on three insulated electrodes, c 1 c 2 , C 3 , which were portions of a disc of diameter 7 cm., c 2 being a narrow strip 5 mm. wide, cut from the centre of the disc and insulated by narrow air gaps from the two electrodes, c 1 c 3 , on each side of it. The electric field between A and the electrodes C was maintained constant by a series of rings of diameter 7 cm., kept at uniformly decreasing potentials. In this case the differential equation giving the distribution n of electrons in the electric field is ∇ 2 n = 41 Z/ k . ∂ n /∂ z . If q is defined to be ∫ ndy , this equation becomes ∂ 2 q /∂ x 2 + ∂ 2 q /∂ z 2 = 41 Z/ k . ∂ q /∂ z . If n 1 n 2 , n 3 are the charges received by the electrodes c 1 , c 2 , c 3 , it is shown that the values of Z/ k can be found by determining the ratio R = n 2 /( n 1 + n 2 + n 3 ), i . e . the value of k corresponding to any Z can be found. Experiments had previously been performed in which a circular stream of ions was collected on concentric circular electrodes, and from the results it appeared that the term ∂ 2 n /∂ z 2 was small compared with the others. By neglecting this term, Prof. Townsend obtained a solution of the differential equation in a simple form and plotted a curve with co-ordinates R and Z/ k .

Research on FM Telemetry Software Demodulation Algorithms

2014 ◽  
Vol 989-994 ◽  
pp. 3938-3941
Author(s):  
Gang Fu ◽  
Yan Jun Wu ◽  
Ren Long Li ◽  
Li Ping Wang
Keyword(s):  
Maximum Likelihood ◽  
Decision Process ◽  
Present Situation ◽  
Telemetry System ◽  
Coherent Demodulation ◽  
Synchronization Method ◽  
Symbol Detection ◽  
And Control ◽  
Measurement And Control ◽  
Demodulation Method

Aimed at the problem that the demodulation threshold of non-coherent demodulation technology of PCM/FM telemetry system using frequency modulation in the present situation of aerospace measurement and control is higher, research a kind of multiple symbol detection based on maximum likelihood thought (Multi-Symbol Detection, MSD) demodulation method. This paper introduces the principle of multiple symbol detection and aiming at the shortcomings of the previous synchronization method, studies a kind of symbol decision process and synchronization of the combination of synchronization method.

Demodulating Method of Frequency Predictable Digital FM Signal

2014 ◽  
Vol 644-650 ◽  
pp. 4595-4598
Author(s):  
Gang Fu ◽  
Jian Hua Lin ◽  
Qian He
Keyword(s):  
Background Noise ◽  
Noise Immunity ◽  
Estimation Method ◽  
New Method ◽  
Signal Estimation ◽  
Signal Phase ◽  
Frequency Signal ◽  
Phase Fluctuations ◽  
Coherent Demodulation ◽  
Demodulation Method

This paper presents a new method for strong background noise of known frequency signal estimation method is then applied to the demodulated digital FM signal. This new method only needs to know the frequency of the demodulated carrier signal phase information without the need to complete the digital FM demodulation signal. Computer simulations show that the method has more than non-coherent demodulation noise immunity, and has a very strong ability of anti-phase fluctuations. Thus, the demodulation method has good prospects for engineering applications.

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