scholarly journals Web development on Earth-Quake Measurement in Seismic Scale

2019 ◽  
Vol 8 (4) ◽  
pp. 5455-5457
Keyword(s):  
Seismic Wave ◽  
Earth Quake ◽  
High Sensitivity ◽  
Wide Band ◽  
Data Representation ◽  
Low Power Consumption ◽  
Electronic Feedback ◽  
New Development ◽  
Development Direction ◽  
Seismic Scale

Seismometer is an instrument that generates seismic wave signals and accurately reflect the movement of the ground. With the development of science and technology, especially when the introduction of electronic feedback technology and the development of digital seismic, the development direction of seismometer was high sensitivity, wide band, anti-interference and low power consumption. Looking forward to the new development direction of seismometer, the research development and application prospect of seismometer are widening. In this paper, the complexity faced in the seismic wave is introduced. The seismometer (newton-meter) calculated by the seismometer instrument during earth-quake has complexity in it due to large amount of magnitude therefore converting it into logarithmic moment (magnitude) becomes ease in data representation. Conversion of given seismicmoment (newton-meter) value to logarithmic magnitude should be performed by using simple logarithmic calculation and also conversion of given logarithmic magnitude value to a logical Seismic - moment value should be performed vice versa. The data visualization is enhanced easily since data of infinite value is converted into measurable finite value .Therefore convertion eases analyzing data during underground nuclear weapon test, occurance of natural tremors etc.

High sensitivity, ultra-wide band divide-by-two circuit with frequency self-adaptive techniques

2011 ◽  
Vol 71 (1) ◽  
pp. 131-136
Author(s):  
N.-S. Mei ◽  
J. Fu ◽  
S.-L. Hao ◽  
Y.-M. Huang ◽  
Z.-L. Hong
Keyword(s):  
High Sensitivity ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Adaptive Techniques ◽  
Self Adaptive

Study on Coordination of Heterogeneous Databases

2014 ◽  
Vol 608-609 ◽  
pp. 336-342
Author(s):  
Huan Liu
Keyword(s):  
Hot Spot ◽  
Computer Software ◽  
Heterogeneous Databases ◽  
Important Research ◽  
Heterogeneous Database ◽  
New Techniques ◽  
Directory Service ◽  
New Development ◽  
Development Direction ◽  
New Applications

How to coordinate heterogeneous database to realize sharing and consistency of information not only is an important research subject in the database filed, but also is an emerging research hot spot in the field of database system. As a new development direction of computer software, it applies some new techniques to integrate the existing systems to develop new applications. The paper analyzes CSCW, XML, JDBC and heterogeneous database, and proposes a solution of heterogeneous database. The solution absorbs the thoughts of database meta data, middle ware and LDAP directory service.

The Design and Implementation of Tri-Axial Magnetometer

2013 ◽  
Vol 663 ◽  
pp. 632-637
Author(s):  
Jia Wen Liu ◽  
Qing Hua Zhou ◽  
Li Li ◽  
Tao Li
Keyword(s):  
Real Time ◽  
Peak Power ◽  
High Sensitivity ◽  
High Accuracy ◽  
Low Power Consumption ◽  
Serial Port ◽  
Time Curve ◽  
Data Process ◽  
Transfer Unit ◽  
Measurement Results

The design, implementation, and testing of a tri-axial magnetometer instrument are introduced. The design is based on the MAG3110 chip. This chip has the properties of low power consumption and high resolution in the conventional mode. It runs with the peak power at 86.4μJ and the resolution of 0.1μT. The 12C5A60S2 MCU is chose as the data process and transfer unit. The data from the MCU is received by the principal computer through serial port. The measurement results, including the strength and the three component of magnetic field are displayed on PC by real-time curve through a VB programmed interface. The comparison between the measurements and the theoretical values shows that this instrument has the characteristic of high accuracy, high sensitivity and real-time display.

scholarly journals Highly Sensitive Diode-Based Micro-Pirani Vacuum Sensor with Low Power Consumption

Sensors ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 188 ◽  
Author(s):  
Debo Wei ◽  
Jianyu Fu ◽  
Ruiwen Liu ◽  
Ying Hou ◽  
Chao Liu ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Forward Bias ◽  
High Sensitivity ◽  
Bias Current ◽  
Low Power Consumption ◽  
Sensor Performance ◽  
Sensor Structure ◽  
Vacuum Sensor ◽  
The One

Micro-Pirani vacuum sensors usually operate at hundreds of microwatts, which limits their application in battery-powered sensor systems. This paper reports a diode-based, low power consumption micro-Pirani vacuum sensor that has high sensitivity. Optimizations to the micro-Pirani vacuum sensor were made regarding two aspects. On the one hand, a greater temperature coefficient was obtained without increasing power consumption by taking advantage of series diodes; on the other hand, the sensor structure and geometries were redesigned to enlarge temperature variation. After that, the sensor was fabricated and tested. Test results indicated that the dynamic vacuum pressure range of the sensor was from 10−1 to 104 Pa when the forward bias current was as low as 10 μA with a power consumption of 50 μW. Average sensitivity was up to 90 μV/Pa and the sensitivity of unit power consumption increased to 1.8 V/W/Pa. In addition, the sensor could also work at a greater forward bias current for better sensor performance.

Design of a Front-End for Satellite Receiver

2016 ◽  
Vol 6 (5) ◽  
pp. 2282 ◽  
Author(s):  
Tran Van Hoi ◽  
Ngo Thi Lanh ◽  
Nguyen Xuan Truong ◽  
Nguyen Huu Duc ◽  
Bach Gia Duong
Keyword(s):  
Dynamic Range ◽  
Noise Figure ◽  
High Sensitivity ◽  
Wide Band ◽  
Local Oscillator ◽  
Low Noise ◽  
Voltage Controlled Oscillator ◽  
Front End ◽  
L Band ◽  
Satellite Receiver

<p>This paper focuses on the design and implementation of a front-end for a Vinasat satellite receiver with auto-searching mechanism and auto-tracking satellite. The front-end consists of a C-band low-noise block down-converter and a L-band receiver. The receiver is designed to meet the requirements about wide-band, high sensitivity, large dynamic range, low noise figure. To reduce noise figure and increase bandwidth, the C-band low-noise amplifier is designed using T-type of matching network with negative feedback and the L-band LNA is designed using cascoded techniques. The local oscillator uses a voltage controlled oscillator combine phase locked loop to reduce the phase noise and select channels. The front-end has successfully been designed and fabricated with parameters: Input frequency is C-band; sensitivity is greater than -130 dBm for C-band receiver and is greater than -110dBm for L-band receiver; output signals are AM/FM demodulation, I/Q demodulation, baseband signals.</p>

High sensitivity wide band digital solar polarimetric spectroscope

1996 ◽  
Vol 17 (4-5) ◽  
pp. 385-388 ◽  
Author(s):  
H.S Sawant ◽  
J.H.A Sobral ◽  
F.C.R Fernandes ◽  
J.R Cecatto ◽  
W.G Day ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Wide Band
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