High Accuracy Measurement of Elastic Constants of Thin Films by Surface Brillouin Scattering

2008 ◽  
pp. 109-109-18 ◽  
Author(s):  
MG Beghi ◽  
CE Bottani ◽  
R Pastorelli
Keyword(s):  
Thin Films ◽  
Elastic Constants ◽  
Brillouin Scattering ◽  
High Accuracy ◽  
Accuracy Measurement ◽  
High Accuracy Measurement

Design and Evaluation of a High-Accuracy Measurement System for Sheet Resistance of Thin Films

2014 ◽  
Vol 609-610 ◽  
pp. 106-112 ◽  
Author(s):  
Hai Bin Pan ◽  
Jian Ning Ding ◽  
Bao Guo Cao ◽  
Guang Gui Cheng
Keyword(s):  
Thin Films ◽  
Sheet Resistance ◽  
Measurement System ◽  
High Accuracy ◽  
Voltage Measurement ◽  
Switching Circuit ◽  
Digital Output ◽  
Accuracy Measurement ◽  
Output Module ◽  
High Accuracy Measurement

Inspection and measurement for the sheet resistance and resistivity play a pivotal role in the semiconductor industry. In this study, a high-accuracy measurement system for sheet resistance of thin films was designed based on dual-measurement with four-point probe method. The measurement system was composed of a special switching circuit, a digital output module, Keithley 2400 SourceMeter, and a computer running LabVIEW. The special switching circuit designed based on the multiplexer played an important role in current probes and voltage probes automatic switching under the control of virtual instrumentation software LabVIEW and National instruments digital output module hardware NI 9401. Keithley 2400 SourceMeter controlled by LabVIEW was used for two-times high-precision voltage measurement. Van der Pauw correction factor were calculated based on the results of the two-times voltage measurement. Then the sheet resistance of thin films was calculated by LabVIEW softwares powerful computing. The experimental results show that the designed and developed system can meet the needs of fast on-line measurement of thin films sheet resistance with a wide range, and moreover, the accuracy of measurements and the level of automatization have been dramatically improved compared to the conventional measurement system.

High accuracy measurement of the ground-state hyperfine splitting in a 113Cd+ microwave clock: erratum

2021 ◽  
Vol 46 (20) ◽  
pp. 5207
Author(s):  
K. Miao ◽  
J. W. Zhang ◽  
X. L. Sun ◽  
S. G. Wang ◽  
A. M. Zhang ◽  
...  
Keyword(s):  
Ground State ◽  
Hyperfine Splitting ◽  
High Accuracy ◽  
Accuracy Measurement ◽  
High Accuracy Measurement

scholarly journals High Accuracy Measurement of Total Losses in Fractional Horsepower Induction Motors

2015 ◽  
Vol 1 (2) ◽  
pp. 13
Author(s):  
Azzeddine Ferrah ◽  
Mounir Bouzguenda ◽  
Jehad M. Al-Khalaf Bani Younis
Keyword(s):  
Single Phase ◽  
Induction Motors ◽  
Data Acquisition System ◽  
High Accuracy ◽  
Industrial Applications ◽  
Motor Speed ◽  
Accuracy Measurement ◽  
Three Phase ◽  
Better Than ◽  
High Accuracy Measurement

Large and small single-phase and three-phase induction motors are commonly used in industrial applications. The present work represents an attempt towards the design of a high accuracy system for the measurement of fractional horsepower (FHP) induction motor losses and efficiency. The calorimeter designed and built is capable of measuring heat losses of up to 1 kW with an overall accuracy better than 3%. During all tests, ambient temperature, humidity, motor speed and motor frame temperature were recorded using precise digital instruments. The inlet, outlet temperatures and resulting losses were recorded automatically using a high accuracy 12-bit data acquisition system. The preliminary results obtained demonstrate the suitability of the designed calorimeter for the accurate measurement of losses in FHP induction motors.

High accuracy measurement model of laser triangulation method

2018 ◽  
Vol 47 (9) ◽  
pp. 906008
Author(s):  
孙兴伟 Sun Xingwei ◽  
于欣玉 Yu Xinyu ◽  
董祉序 Dong Zhixu ◽  
杨赫然 Yang Heran
Keyword(s):  
Measurement Model ◽  
High Accuracy ◽  
Laser Triangulation ◽  
Accuracy Measurement ◽  
Triangulation Method ◽  
High Accuracy Measurement ◽  
Laser Triangulation Method
Sign in / Sign up

Export Citation Format

Share Document