scholarly journals High-Accuracy 3D Optical Profilometry for Analysis of Surface Condition of Modern Circulated Coins

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5371
Author(s):  
Wojciech Kapłonek ◽  
Tadeusz Mikolajczyk ◽  
Danil Yurievich Pimenov ◽  
Munish Kumar Gupta ◽  
Mozammel Mia ◽  
...  
Keyword(s):  
Surface Condition ◽  
Measurement Techniques ◽  
High Accuracy ◽  
Optical Profilometry ◽  
Accuracy Measurement ◽  
Measurement Systems ◽  
Two Generations ◽  
Source Of Information ◽  
Selection Of ◽  
High Accuracy Measurement

The article shows that noncontact measurement techniques can be an important support to X-ray-based methods when examining the surface condition of modern circulated coins. The forms and degrees of wear of such coins, affecting their utility values, qualifying them as a legal tender in a given country, can be measured and analyzed, among other things, using advanced high-accuracy optical profilometry methods. The authors presented four analyses carried out for reverses and obverses of round coins (1 zloty, 1 franc, 50 bani, 5 pens) characterized by different degrees of surface wear. All of the coins were measured using 3D optical profilometers (Talysurf CLI 2000 and S neox) representing two generations of these types of systems. The obtained results confirm the validity of the applied high-accuracy measurement systems in conjunction with dedicated software in the presented applications. Examples of the analyses carried out can be a significant source of information on the condition of coins in the context of maintaining their functional properties (selection of appropriate wear–resistant alloys and correctness of the production process).

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