High resolution space quartz-flexure accelerometer based on capacitive sensing and electrostatic control technology

2012 ◽  
Vol 83 (9) ◽  
pp. 095002 ◽  
Author(s):  
W. Tian ◽  
S. C. Wu ◽  
Z. B. Zhou ◽  
S. B. Qu ◽  
Y. Z. Bai ◽  
...  
Keyword(s):  
High Resolution ◽  
Control Technology ◽  
Capacitive Sensing ◽  
Electrostatic Control ◽  
Quartz Flexure Accelerometer

scholarly journals Modulation and Control Technology for Generating Movable Super-Diffraction Optical Needle by Oblique Incidence

2020 ◽  
Vol 10 (15) ◽  
pp. 5237
Author(s):  
Simo Wang ◽  
Siyang Yu ◽  
Fanxing Li ◽  
Fuping Peng ◽  
Jialin Du ◽  
...  
Keyword(s):  
High Resolution ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Laser Processing ◽  
Oblique Incidence ◽  
Incidence Angle ◽  
Scanning System ◽  
Control Technology ◽  
Depth Of Focus ◽  
And Control

The movable super-diffraction optical needle (MSON) is a tightly focused beam like a “needle”, which can realize vector scanning on the focusing plane. Not only does it have a long focal depth, but its resolution also exceeds the diffraction limit. The modulation and control technology required for generating MSON by oblique incidence is explored in this manuscript for the purpose of processing high-aspect-ratio, sub-wavelength structures. As the optical needle generated by traditional methods is static and sensitive to variation of the angle information of the incident beam, here we introduce a confocal scanning system by using a two-dimensional galvanometer system, a scan lens, and a tube lens to control the oblique incidence angle. The effects of the oblique incidence angle on the resolution, depth of focus, uniformity, and side lobes of the MSON were analyzed. Further, the voltage-controlled liquid crystal located between the scan lens and the 2D galvanometer system can be used to compensate for the additional phase difference caused by oblique incidence. The aspect ratio is defined as the ratio of depth of focus to resolution. By modulating and controlling the light field, the MSON with high aspect ratio (7.36), sub-diffractive beam size (0.42λ), and long depth of focus (3.09λ) has been obtained with homogeneous intensity, and suppressed side lobes. High speed, high axial positioning tolerance, and high-resolution laser processing can also be achieved, which removes the restrictions presented by traditional laser processing technology, for which high resolution and long depth of focus cannot be achieved simultaneously.

High resolution quartz flexure accelerometer based on laser self-mixing interferometry

2015 ◽  
Vol 86 (6) ◽  
pp. 065001 ◽  
Author(s):  
Cuo Wang ◽  
Xingfei Li ◽  
Ke Kou ◽  
Tengfei Wu ◽  
Hongbiao Xiang
Keyword(s):  
High Resolution ◽  
Quartz Flexure Accelerometer

Based on Active Vibration Control Technology of Signal Acquisition System Research

2012 ◽  
Vol 580 ◽  
pp. 165-169
Author(s):  
Jia Wei Chu ◽  
Rui Hua Xu ◽  
Jun Hua He ◽  
Ming Zhi Wei ◽  
Wei Wang
Keyword(s):  
Experimental Data ◽  
High Resolution ◽  
Active Vibration Control ◽  
Vibration Signal ◽  
Acquisition System ◽  
Vibration Measurement ◽  
Signal Acquisition ◽  
Control Technology ◽  
System Research ◽  
Active Vibration

The principle of full vibration signal acquisition system is introduced. This article through the use of PSD high resolution, the characteristics of the corresponding speed, put it to use in vibration measurement, and introduces the realization method, Including the front optical, electrical and late signal processing, And through the concrete experimental data, and verifies the feasibility of the scheme.

scholarly journals Capacitive Sensing and Electrostatic Control System Design and Analysis With a Torsion Pendulum

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 1021-1030 ◽  
Author(s):  
Yukun Wang ◽  
Keqi Qi ◽  
Shaoxin Wang ◽  
Wei Li ◽  
Zhe Li ◽  
...  
Keyword(s):  
Control System ◽  
System Design ◽  
Control System Design ◽  
Torsion Pendulum ◽  
Capacitive Sensing ◽  
Electrostatic Control

Observations of the spatial structure of interstellar hydrogen

1967 ◽  
Vol 31 ◽  
pp. 45-46
Author(s):  
Carl Heiles
Keyword(s):  
High Resolution ◽  
Spatial Structure ◽  
Velocity Dispersion ◽  
Temperature Variations

High-resolution 21-cm line observations in a region aroundlII= 120°,b11= +15°, have revealed four types of structure in the interstellar hydrogen: a smooth background, large sheets of density 2 atoms cm-3, clouds occurring mostly in groups, and ‘Cloudlets’ of a few solar masses and a few parsecs in size; the velocity dispersion in the Cloudlets is only 1 km/sec. Strong temperature variations in the gas are in evidence.

Combining integrated systems-biology approaches with intervention-based experimental design provides a higher-resolution path forward for microbiome research

2019 ◽  
Vol 42 ◽  
Author(s):  
J. Alfredo Blakeley-Ruiz ◽  
Carlee S. McClintock ◽  
Ralph Lydic ◽  
Helen A. Baghdoyan ◽  
James J. Choo ◽  
...  
Keyword(s):  
Systems Biology ◽  
High Resolution ◽  
Experimental Design ◽  
Integrated Systems ◽  
Microbiome Research ◽  
Constructive Criticism

Abstract The Hooks et al. review of microbiota-gut-brain (MGB) literature provides a constructive criticism of the general approaches encompassing MGB research. This commentary extends their review by: (a) highlighting capabilities of advanced systems-biology “-omics” techniques for microbiome research and (b) recommending that combining these high-resolution techniques with intervention-based experimental design may be the path forward for future MGB research.

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

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