scholarly journals An Inductive Sensor for Two-Dimensional Displacement Measurement

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 1819 ◽  
Author(s):  
Liang Wu ◽  
Shi Xu ◽  
Ziqiang Zhong ◽  
Chuan Mou ◽  
Xinda Wang
Keyword(s):  
Secondary Coil ◽  
Two Dimensional ◽  
Primary Coil ◽  
Element Analysis ◽  
Inductive Sensor ◽  
Electromagnetic Model ◽  
The Finite Element Analysis ◽  
Coordinate Rotation ◽  
Working Principle ◽  
Spiral Coils

The simultaneous and independent measurements of two-dimensional (2D) displacements are significant for 2D positioning. Here a planar inductive sensor which is based on the principle of electromagnetic induction is proposed. The sensor is composed of a primary coil and a secondary coil. The primary coil consists of an array of planar spiral coils which are arranged as an m × n matrix. The primary coil is supplied with 4 kHz alternating current to generate an array of pulsating magnetic field. The secondary coil contains four spiral coils which are arranged as a 2 × 2 matrix. Thereby, four roads of modulated signals whose amplitudes vary with displacements of the secondary coil along x- and y-axis are induced. An algorithm based on the Coordinate Rotation Digital Computer algorithm is introduced to resolve the planar displacements. The structure and working principle of the sensor are proposed firstly. Then, the finite element analysis of the electromagnetic model and the numerical simulation of the algorithm are given. An experiment has been performed on a sensor prototype and the results show that the proposed scheme is feasible. Measurement error analysis of the sensor has been pursued at the end of the paper.

Determination of Stress Concentration Around an Oblique Hole by a Finite-Element Technique

1983 ◽  
Vol 105 (2) ◽  
pp. 206-212 ◽  
Author(s):  
Hua-Ping Li ◽  
F. Ellyin
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Maximum Stress ◽  
Plate Thickness ◽  
Two Dimensional ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Parametric Studies ◽  
Element Technique

A plate weakened by an oblique penetration of a circular cylindrical hole has been investigated. The stress concentration around the hole is determined by a finite-element method. The results are compared with experimental data and other analytical works. Parametric studies of effects of angle of inclination, plate thickness, and width are performed. The maximum stress concentration factor (SCF) obtained from the finite-element analysis is higher than experimental results, and this deviation increases with the increase of angle of skewness. The major reason for this difference is attributed to the shear-action between layers parallel to the plate surface which cannot be directly included in the two-dimensional elements. An empirical formula is derived which accounts for the shear-action and renders the finite-element predictions in line with experimentally observed data.

Design and Analysis of a Novel Hybrid Excitation Flux Reversal Machine

2021 ◽  
Vol 36 (2) ◽  
pp. 218-228
Author(s):  
Xianming Deng ◽  
Zhen Jia ◽  
Xiaohan Zhao
Keyword(s):  
Motor Performance ◽  
Opposite Polarity ◽  
Magnetic Pole ◽  
Element Analysis ◽  
The Core ◽  
Flux Reversal ◽  
The Finite Element Analysis ◽  
Hybrid Excitation ◽  
Working Principle ◽  
Flux Reversal Machine

A novel hybrid excitation flux reversal machine (HEFRM) is developed. The machine has a simple reluctance rotor and a stator, which has both an ac armature winding and a dc field winding. The core on the surface of the pole arc at the centerline of the stator pole and the core on the outer surface of the stator yoke each have a slot along the rotating axis, where the field windings are placed. A permanent magnet (PM) with opposite polarity is placed respectively on each side of a slot in the same stator pole. In this paper, the working principle of the new HEFRM is introduced, the influence of magnetic pole parameters and armature parameters on motor performance are also analyzed, and genetic algorithm (GA) is used for multi-objective optimization of the torque characteristics. Finally, the HEFRM prototype is built, and its theoretical correctness is verified by the finite element analysis (FEA).

Design and experiment of a jetting dispenser with compact amplifying mechanism and low stress in piezostack

2020 ◽  
Vol 31 (5) ◽  
pp. 788-798
Author(s):  
Lingyun Wang ◽  
Xiang Huang ◽  
Siying Lin ◽  
Zhenxiang Bu ◽  
Hang Jin ◽  
...  
Keyword(s):  
Internal Stress ◽  
Droplet Diameter ◽  
Experimental System ◽  
Microelectronic Packaging ◽  
Element Analysis ◽  
Output Displacement ◽  
The Finite Element Analysis ◽  
Working Principle ◽  
Amplification Mechanism ◽  
Compact Design

This article introduced a piezostack-driven jetting dispenser for a microelectronic packaging process. The dispenser had a compact displacement amplification module using two piezostack actuators for achieving compact design and maintaining high jetting performance and improving internal stress on the piezostack actuators. In this article, a working principle of a jetting dispenser configuration was introduced and was followed by the presentation of a displacement amplification mechanism using a cylindrical pivot. The dimensions of the amplification mechanism were determined based on a theoretical calculation of the system and the finite element analysis results. The internal stress of the piezostack and the output displacement of the dispenser were investigated at different operational frequencies. The experimental system with the jetting dispenser was manufactured, and the system performance was verified experimentally. For evaluating the performance, a mixed glycerol/ethanol was used for the dispensing fluid. The jetting system in this study achieved an ideal jetting performance at a jetting frequency of 350 Hz and a droplet diameter of 0.42 mm.

The Study of 3-D Magnetic Field Finite Element Analysis for Giant Magnetostrictive Actuator

2012 ◽  
Vol 605-607 ◽  
pp. 1427-1430 ◽  
Author(s):  
Fan Zhang ◽  
Zhi Xin Ma ◽  
Shang Gao
Keyword(s):  
Magnetic Field ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Analysis Model ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Magnetic Field Model ◽  
Working Principle ◽  
Magnetostrictive Actuator ◽  
D Model

Based on the structure and working principle of our giant magnetostrictive actuator (GMA), the properties of the driving magnetic field were researched. A 3-D nonlinear magnetic field model of the GMA was established with the finite element analysis method, and the magnetic field distribution of the GMA was obtained with the software ANSYS. Then the 3-D model helped us to find the effects about the distribution of magnetic field of the GMA from the structure. The 3-D magnetic field finite element analysis model can give us a new tool of GMA design and analysis.

Thermal Stability Analysis and Optimal Design for a Two-Dimensional Angle Sensor

2017 ◽  
Vol 868 ◽  
pp. 3-8 ◽  
Author(s):  
Rui Jun Li ◽  
Peng Xu ◽  
Shuai Tao Tang ◽  
Kuang Chao Fan ◽  
Qiang Xian Huang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Environmental Temperature ◽  
Two Dimensional ◽  
Element Analysis ◽  
Angle Sensor ◽  
Optimal Angle ◽  
Precision Measuring ◽  
Measurement Resolution ◽  
The Finite Element Analysis ◽  
Measured Angle

A compact two-dimensional angle sensor with a measurement resolution that exhibits superior sensitivity has been designed based on the autocollimator principle to enable the precision measurement field to measure the pitch and yaw error motions of a moving object. The signal drift of this sensor affects the measured angle and is mainly caused by the change in environmental temperature. To improve the thermal stability of the sensor, computer simulation has been conducted using the finite element analysis software ANSYS 16. Simulation results show that the angle sensor is considerably stable to adopt mechanisms with a symmetrical structure. Thus, a modified optimal angle sensor is developed, and its thermal stability has been verified via contrast experiments. Compared with the original sensor, the average drift of the optimized angle sensor is reduced from 0.430 arcsec∕°C to 0.120 arcsec∕°C when the variation of the environmental temperature is 5 °C. The optimal angle sensor is ideal for high-precision measuring equipment.

Discussion on the Design of a New Type Down-Hole BOP

2011 ◽  
Vol 84-85 ◽  
pp. 294-298
Author(s):  
Qi Ming Yang ◽  
Ying Fu ◽  
Cun Yong Guo
Keyword(s):  
Finite Element Analysis ◽  
Simple Structure ◽  
Development Prospect ◽  
Hole State ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Blowout Preventer ◽  
Drilling Operations ◽  
New Type ◽  
Working Principle

There was a new down-hole BOP that was designed to control blowout effectively in exploiting petroleum gas. The BOP was a new blowout preventer with a good development prospect which can not only automatically shut underground, but also control and automatically discharge shut up-hole state on the ground. Through introducing structure and working principle of the BOP, as well as the finite element analysis of some key components, there has been showed that the down-hole blowout preventer met the strength requirements and had relatively high security. The down-hole blowout preventer with a simple structure can not only work reliably but also complete the act of preventing blowout and unlocking many times to prevent blowout effectively and to improve drilling operations safety and efficiency. It will have a bright development prospect.

Simulation Analysis of Support Installation Vehicle’s Working Unit Based on ADAMS

2012 ◽  
Vol 482-484 ◽  
pp. 1707-1712
Author(s):  
Hui Sheng Guan ◽  
Ke Long Luo ◽  
Dong Dong
Keyword(s):  
Finite Element Analysis ◽  
Driving Force ◽  
3D Model ◽  
Simulation Analysis ◽  
Virtual Prototyping ◽  
Element Analysis ◽  
Joint Force ◽  
The Finite Element Analysis ◽  
Adams Software ◽  
Working Principle

This paper introduces the structural composition and the working principle of the support installation vehicle. The 3D model of the support installation vehicle is established in SolidWorks and imported into ADAMS. Then the virtual prototyping model of the support installation vehicle is established with ADAMS software. The dynamically leveling angle curve of the leveling mechanism is obtained by the simulation analysis. Curves of cylinders’ driving force and the joint force are also derived. The results of simulation analysis contribute to the finite element analysis of working unit and the designs of cylinders of the support installation vehicle.

Finite Element Analysis of Capacitance Sensor

2014 ◽  
Vol 599-601 ◽  
pp. 940-943
Author(s):  
Fei Zhou ◽  
Guo Min Lin ◽  
Miao Shang ◽  
Wen Guang Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Capacitive Sensor ◽  
Application Research ◽  
Capacitance Sensor ◽  
Capacitance Change ◽  
Element Analysis ◽  
Development Status ◽  
The Finite Element Analysis ◽  
Working Principle

Capacitive sensor is a kind of parameter type sensor that capacitance is measured is converted to capacitance change. It is widely used in pressure, liquid level, displacement and other tests. In this article, the development status of capacitance sensor is showed; the working principle of capacitive sensor was introduced; through the method of grid subdivision, loading and solving of boundary conditions and the finite element post-processing, etc., the finite element analysis of capacitance sensor is complete, it has important guiding significance for capacitance sensor application research.

Analytical calculations of electromagnetic quantities for wound rotor salient-pole synchronous machines

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zohreh Delirani ◽  
Akbar Rahideh ◽  
Mohammad Mardaneh
Keyword(s):  
Analytical Model ◽  
Synchronous Machines ◽  
Magnetic Flux Density ◽  
Two Dimensional ◽  
Element Analysis ◽  
Content Type ◽  
Electromagnetic Model ◽  
Salient Pole ◽  
Salient Pole Synchronous Machine ◽  
Electromagnetic Quantities

Purpose This paper aims to present an analytical electromagnetic model for wound rotor synchronous machines with a salient-pole rotor structure based on the two-dimensional subdomain technique. Design/methodology/approach The machine is divided into five active sub-regions: stator slots, stator slot openings, air gap, rotor slots and rotor slot openings. For each sub-region, the governing partial differential equations are derived and solved analytically. Findings The magnetic flux density distributions in all active sub-regions are analytically computed and other quantities such as back-emf, inductances, electromagnetic torque and unbalanced magnetic forces are also analytically calculated. The results of the analytical model are compared to those obtained from the finite element analysis to show the accuracy of the proposed model. Originality/value The two-dimensional analytical model of a wound rotor salient-pole synchronous machine using the sub-domain technique is the main contribution of the research.

Sign in / Sign up

Export Citation Format

Share Document