Design and Optimization of a New Micro-Hotplate for Gas Sensor

2013 ◽  
Vol 791-793 ◽  
pp. 1880-1883
Author(s):  
Guo Guang Wang ◽  
Xiao Bo Zhang ◽  
Chang Bai Liu ◽  
Li Liu
Keyword(s):  
Gas Sensor ◽  
Substrate Thickness ◽  
Measuring Electrode ◽  
Si Substrate ◽  
Element Analysis ◽  
Design And Optimization ◽  
Sensor Performance ◽  
Micro Gas Sensor ◽  
The Finite Element Analysis ◽  
Electrode Space

This paper reports on the optimization of a novel micro-hotplate with three pins designed for micro-structural gas sensor. The temperature distribution of the Si-substrated micro gas sensor was simulated and analyzed by the finite element analysis (FEA) tool ANSYS. In order to make the gas sensor obtain perfect properties of good temperature uniformity, the thickness of Si substrate, thickness of the front and rear SiO2, measuring electrode width and electrode space were designed to be 150, 50,100, 20 and 500 μm, respectively. The new micro-structural gas sensor is benefit for the improvement of sensor performance.

Design and Optimization Analysis of a Novel MEMS Micro-Hotplate for Gas Sensor

2013 ◽  
Vol 791-793 ◽  
pp. 1014-1017
Author(s):  
Xiao Bo Zhang ◽  
Chang Bai Liu ◽  
Li Liu ◽  
Yue He ◽  
Lian Yuan Wang
Keyword(s):  
Magnetic Field ◽  
Gas Sensor ◽  
Si Substrate ◽  
Electrode Structure ◽  
Optimization Analysis ◽  
Design And Optimization ◽  
Sensor Performance ◽  
Measurement Signal ◽  
Electrode Space ◽  
Higher Temperature

The paper presents a novel Si-substrated micro-hotplate for gas sensor. Use platinum filament as heater, SiO2 as thermal and electricity insulation. Through optimizing analysis, in order to make the gas sensor obtain perfect properties of higher temperature and uniform temperature distribution, the thickness of SiO2, thickness of Si substrate, electrode width and electrode space are designed to be 50, 250, 20 and 500 μm, respectively. Via the analysis of magnetic field distribution of the new gas sensor, the new electrode structure can eliminate the interference on the measurement signal from magnetic field, which is benefit for the improvement of sensor performance.

Design and Analysis of a New Electrode for Micro-Structure Gas Sensor

2013 ◽  
Vol 397-400 ◽  
pp. 1617-1620
Author(s):  
Chang Bai Liu ◽  
Ke Bi ◽  
Xiao Bo Zhang
Keyword(s):  
Magnetic Field ◽  
Temperature Distribution ◽  
Gas Sensor ◽  
Measuring Electrode ◽  
Micro Structure ◽  
Electrode Structure ◽  
Sensor Performance ◽  
Measurement Signal ◽  
Electrode Space ◽  
The Magnetic Field

A novel electrode structure is designed. Through the analysis of the temperature distribution of the gas sensor, the micro-structure gas sensor owns the best temperature distribution when the heating width, measuring electrode width and electrode space are designed to be 50, 20 and 500 μm, respectively. Through the simulation of the magnetic field, the new electrode can eliminate the interference from magnetic field on the measurement signal, which is beneficial to improve the sensor performance.

A Novel Micro-Hotplate Designed for Micro-Gas Sensor

2013 ◽  
Vol 411-414 ◽  
pp. 1569-1572
Author(s):  
Ji Li ◽  
Xiao Bo Zhang ◽  
Li Liu
Keyword(s):  
Temperature Distribution ◽  
Gas Sensor ◽  
Uniform Temperature ◽  
Si Substrate ◽  
Original Design ◽  
Uniform Temperature Distribution ◽  
Micro Gas Sensor ◽  
Electrode Space ◽  
Higher Temperature ◽  
Simulation Results

A original design of micro-hotplate is proposed for micro-structural gas sensor. The simulation results of ANSYS reveal that higher temperature and more uniform temperature distribution was achieved in the micro-hotplate when the thickness of SiO2, thickness of Si substrate, electrode width and electrode space were designed to be 100, 200, 20 and 250 μm, respectively. The new micro-hotplate is beneficial to improving the sensor sensitivity.

Design, Simulation and Optimization of a New Micro-Structural Gas Sensor

2013 ◽  
Vol 677 ◽  
pp. 125-129
Author(s):  
Xiao Bo Zhang ◽  
Chang Bai Liu ◽  
Li Liu ◽  
Hao Shan ◽  
Lian Yuan Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Gas Sensor ◽  
Signal Interference ◽  
Si Substrate ◽  
Simulation And Optimization ◽  
Sensor Performance ◽  
Electrode Space ◽  
Higher Temperature ◽  
Measuring Signal ◽  
The Magnetic Field

Micro-structural gas sensor with a new kind of electrode is designed. Platinum filament is selected as gold electrodes, and SiO2 is used as the thermal and electricity insulation layer. The simulation results of ANSYS reveal that when the thickness of SiO2, thickness of Si substrate, electrode with and electrode space are 50, 250, 15 and 60 µm, respectively, the sensors can own higher temperature and uniform temperature distributing in the center. The magnetic field distribution is also analyzed by ANSYS, and the results show that the new electrodes can eliminate magnetic field from the heater on the measuring signal interference, which is benefit for the improvement of sensor performance.

scholarly journals Rapid Design and Analysis of Microtube Pneumatic Actuators Using Line-Segment and Multi-Segment Euler–Bernoulli Beam Models

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 780 ◽  
Author(s):  
Myunggi Ji ◽  
Qiang Li ◽  
In Ho Cho ◽  
Jaeyoun Kim
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Line Segment ◽  
Beam Model ◽  
Element Analysis ◽  
Pneumatic Actuators ◽  
Design And Optimization ◽  
Rapid Design ◽  
The Finite Element Analysis ◽  
Soft Actuators

Soft material-based pneumatic microtube actuators are attracting intense interest, since their bending motion is potentially useful for the safe manipulation of delicate biological objects. To increase their utility in biomedicine, researchers have begun to apply shape-engineering to the microtubes to diversify their bending patterns. However, design and analysis of such microtube actuators are challenging in general, due to their continuum natures and small dimensions. In this paper, we establish two methods for rapid design, analysis, and optimization of such complex, shape-engineered microtube actuators that are based on the line-segment model and the multi-segment Euler–Bernoulli’s beam model, respectively, and are less computation-intensive than the more conventional method based on finite element analysis. To validate the models, we first realized multi-segment microtube actuators physically, then compared their experimentally observed motions against those obtained from the models. We obtained good agreements between the three sets of results with their maximum bending-angle errors falling within ±11%. In terms of computational efficiency, our models decreased the simulation time significantly, down to a few seconds, in contrast with the finite element analysis that sometimes can take hours. The models reported in this paper exhibit great potential for rapid and facile design and optimization of shape-engineered soft actuators.

Design and Optimization of Mechanically Resonant Torsional Spring Mechanism for Laser Light Dispersion Applications

2011 ◽  
Vol 133 (1) ◽  
Author(s):  
Loke Kean Koay ◽  
Horizon Gitano-Briggs
Keyword(s):  
Laser Light ◽  
Geometric Optimization ◽  
Geometrical Parameters ◽  
Analysis Model ◽  
Original Design ◽  
Element Analysis ◽  
Design And Optimization ◽  
Torsional Spring ◽  
The Finite Element Analysis ◽  
Spring Mechanism

A laser light scanning device consisting of an electronically driven mechanically resonant torsional spring-mirror system was developed for display applications. The original design suffers fatigue failure due to the repeated rotation of the torsional spring. The torsional spring design is investigated and analyzed to attain the lowest possible stress level while maintaining a constant resonant frequency. The finite element analysis model of the torsional spring was created and the stress was minimized by changing the geometrical parameters of the spring. Spring geometric optimization resulted in a maximum stress of 0.632 GPa, that is 12% reduction in stress from the original design, which should give an extended life span of 1 month for the intended application.

Optimization of a Novel Micro-Hotplate for Gas Sensor

2013 ◽  
Vol 423-426 ◽  
pp. 2317-2320
Author(s):  
Chang Chun Li ◽  
Xiao Bo Zhang ◽  
Li Liu
Keyword(s):  
Temperature Distribution ◽  
Gas Sensor ◽  
Uniform Temperature ◽  
Si Substrate ◽  
Uniform Temperature Distribution ◽  
Sensor Sensitivity ◽  
Electrode Space ◽  
Higher Temperature ◽  
Simulation Results ◽  
Novel Design

A novel design of micro-hotplate is proposed for micro-structural gas sensor. The simulation results of ANSYS reveal that higher temperature and more uniform temperature distribution was achieved in the micro-hotplate when the thickness of SiO2, thickness of Si substrate, electrode width and electrode space were designed to be 100, 200, 20 and 230 μm, respectively. The new micro-hotplate is benefit for the improvement of sensor sensitivity.

Design and Optimization of Rear Wheel Assembly for All-Terrain Vehicle

2021 ◽  
Vol 13 (3) ◽  
Author(s):  
M. Anthony Bala Paul Raj ◽  
Raghavendran Pala Raviramachandran ◽  
N. Prakash ◽  
Bh. Chirudeep Reddy ◽  
V. Gopi Krishna
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Factor Of Safety ◽  
Material Selection ◽  
Rear Wheel ◽  
Light Weight ◽  
Element Analysis ◽  
3D Mesh ◽  
Design And Optimization ◽  
The Finite Element Analysis

This paper describes the design and optimisation of rear wheel assembly for an all-terrain vehicle. The components of rear wheel assembly are designed with an optimised design intent with light weight material selection. The designed assembly is then discretised using finite element modelling through Hexa-dominant 3D mesh. The upright knuckle and the hub are assessed for their integrity check and the performance of full assembly is verified through simulation. From the post-processed stress results, factor of safety for the designed parts is presented. The presented work can be expanded to optimise the upright and the hub based the resolved gradient stress plots from the finite element analysis.

Effects of Processing Parameters on the Temperature Field of Melts in Aluminothermic Reaction to Prepare Bulk Nanocrystalline Fe3Al

2010 ◽  
Vol 148-149 ◽  
pp. 859-864
Author(s):  
Pei Qing La ◽  
Rui Jiao Lv ◽  
Xin Guo ◽  
Dan Zhang
Keyword(s):  
Cooling Rate ◽  
Processing Parameters ◽  
Substrate Thickness ◽  
Analysis Software ◽  
Element Analysis ◽  
Cooling Stage ◽  
Aluminothermic Reaction ◽  
The Finite Element Analysis ◽  
Bulk Nanocrystalline ◽  
1045 Steel

Making use of the finite element analysis software ANSYS, we calculated the effects of different processing parameters on temperature, cooling rate and superheating time of Fe3Al melt in aluminothermic reaction to prepare bulk Nanocrystalline Fe3Al. The results showed that, with the increase of substrate thickness and reduction of reactant’s quantity, cooling rate of the Fe3Al melt at the initial cooling stage became larger, while the melt purification became worse. With the increase of argon pressure, the Fe3Al melt cooled a little quicker. The cooling rate of melt cooled by glass substrate was lower than that of the melt cooled by 1045 steel and Cu substrate, while the melt purification became better. With the increase of Al2O3, Fe3Al diluents content, the cooling rate at the initial cooling stage became lower, and the melt purification became worse. The experiment verified that the calculated results were in good coincident with the experimental results.

Research on Influence of Parameters Variation on the Fixed Orifice Performance of the Servo-Valve

2012 ◽  
Vol 157-158 ◽  
pp. 612-616
Author(s):  
Jie Tang ◽  
Dian Rong Gao ◽  
Li Wen Wang
Keyword(s):  
Distribution Curve ◽  
Structural Parameter ◽  
Analysis Software ◽  
Element Analysis ◽  
Design And Optimization ◽  
Curve Flow ◽  
The Finite Element Analysis ◽  
Rate Characteristic ◽  
Simulation Results ◽  
Flow Rate Characteristic

In this paper, The finite element analysis software is applied to compute the flow field in the fixed orifice with different structural parameter combinations, the pressure distribution curve, the velocity distribution curve, flow rate characteristic, power loss are obtained. By analyzing simulation results, the influence of the orifice parameters on the performance of the orifice is clear. The research is important for the design and optimization of the fixed throttle orifice of the nozzle-flapper valve.

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