scholarly journals WIRELESS METHANE DETECTOR WITH TEMPERATURE MODULATED HEATING PROFILE

2021 ◽  
Vol 31 (4) ◽  
pp. 30-40
Author(s):  
I. I. Ivanov ◽  
◽  
A. M. Baranov ◽  
V. A. Talipov ◽  
S. M. Mironov ◽  
...  
Keyword(s):  
Operating Time ◽  
Dynamic Measurement ◽  
Measurement Range ◽  
Low Power Consumption ◽  
Dynamic Mode ◽  
Heating Pulse ◽  
Pulsed Heating ◽  
Measurement Mode ◽  
Methane Concentrations ◽  
Heating Profile

The results of development of an autonomous methane detector in a dynamic measurement mode are presented. Industrial catalytic sensor was used as a sensitive element. To prevent burnout of the catalytic sensor microheater which often occurs during pulsed heating, the special form of heating pulse has been developed. The proposed dynamic mode of the sensor heating provides the measurements with low power consumption and the required level of safety in the measurement range of pre-explosive methane concentrations from 0.1 to 2 vol.%. Based on the analysis of the obtained results, the estimation of autonomous operating time of the detector is given.

scholarly journals Expanding the dynamic measurement range for polymeric nanoparticle pH sensors

2011 ◽  
Vol 47 (18) ◽  
pp. 5268 ◽  
Author(s):  
Honghao Sun ◽  
Kristoffer Almdal ◽  
Thomas L. Andresen
Keyword(s):  
Dynamic Measurement ◽  
Measurement Range ◽  
Ph Sensors ◽  
Polymeric Nanoparticle

scholarly journals Surface Profilometry

2021 ◽  
pp. 39-88
Author(s):  
Christopher Taudt
Keyword(s):  
Three Dimensional ◽  
Dynamic Measurement ◽  
Measurement Range ◽  
Dimensional Measurement ◽  
Surface Profilometry ◽  
Novel Approach ◽  
Three Dimensional Measurement ◽  
Measurement Capabilities

AbstractAs outlined in the previous chapter, existing technologies for surface profilometry show certain drawbacks in terms of resolution, dynamic measurement range, three-dimensional measurement capabilities and speed. The following chapter introduces a novel approach to surface profilometry which aims to provide solutions to the problems named. The basic setup for all experiments is centered around a two-beam interferometer of the Michelson type.

Three Dimensional Reconstruction System Based on Laser Radar

2010 ◽  
Vol 102-104 ◽  
pp. 145-149
Author(s):  
Cheng Jun Tian ◽  
Zhi Yong An ◽  
Li Juan Li ◽  
Bing Gao He
Keyword(s):  
Measurement Techniques ◽  
Three Dimensional ◽  
Measurement Range ◽  
Laser Radar ◽  
Work Piece ◽  
Digital Measurement ◽  
Cloud Data ◽  
3D Data ◽  
Dimensional Reconstruction ◽  
Measurement Mode

With the development of manufacturing, obtaining 3D data of objects surface effectively and precisely has been important. In this paper, laser radar is selected to gain 3D geometric data by comparing the current digital measurement techniques, and the measurement principle of laser radar is discussed in detail. For obtaining the whole surface points cloud of work piece and reducing the error of station moving, the mathematical model of station moving is established. This paper also analyzes the characteristics of points cloud data collected using laser radar, estimates the normals of scattered points with PCA method. Finally, the 3D surface of work piece is reconstructed using radial basis function interpolation.This system has the advantages of fast measurement speed, large measurement range and high degree automation.Because laser radar uses optical non-contact measurement mode, so there are no special requirements of the object surface.

Compositional Tuning of Negative Differential Resistance in Bulk Silver Iodide Memristor

2020 ◽  
Author(s):  
SMITA GAJANAN NAIK ◽  
Mohammad Hussain Kasim Rabinal
Keyword(s):  
Power Consumption ◽  
Negative Differential Resistance ◽  
Silver Iodide ◽  
Differential Resistance ◽  
Fast Response ◽  
Low Power Consumption ◽  
Switching Effect ◽  
Memory Switching ◽  
Bulk Silver ◽  
Emerging Memory

Electrical memory switching effect has received a great interest to develop emerging memory technology such as memristors. The high density, fast response, multi-bit storage and low power consumption are their...

Optimal design of a high homogeneous and small-size shim coil for atomic spin gyroscope based on 0-1 linear programming

2020 ◽  
Vol 64 (1-4) ◽  
pp. 165-172
Author(s):  
Dongge Deng ◽  
Mingzhi Zhu ◽  
Qiang Shu ◽  
Baoxu Wang ◽  
Fei Yang
Keyword(s):  
Linear Programming ◽  
Power Consumption ◽  
Low Power ◽  
Optimization Design ◽  
Structural Parameters ◽  
Axial Position ◽  
Low Power Consumption ◽  
Optimal Method ◽  
Atomic Spin ◽  
Shim Coil

It is necessary to develop a high homogeneous, low power consumption, high frequency and small-size shim coil for high precision and low-cost atomic spin gyroscope (ASG). To provide the shim coil, a multi-objective optimization design method is proposed. All structural parameters including the wire diameter are optimized. In addition to the homogeneity, the size of optimized coil, especially the axial position and winding number, is restricted to develop the small-size shim coil with low power consumption. The 0-1 linear programming is adopted in the optimal model to conveniently describe winding distributions. The branch and bound algorithm is used to solve this model. Theoretical optimization results show that the homogeneity of the optimized shim coil is several orders of magnitudes better than the same-size solenoid. A simulation experiment is also conducted. Experimental results show that optimization results are verified, and power consumption of the optimized coil is about half of the solenoid when providing the same uniform magnetic field. This indicates that the proposed optimal method is feasible to develop shim coil for ASG.

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