Surface hardening of parts and high-precision measuring instruments with a CO2 laser

1983 ◽  
Vol 25 (5) ◽  
pp. 341-342
Author(s):  
O. V. Vladimirova
Keyword(s):  
High Precision ◽  
Co2 Laser ◽  
Surface Hardening ◽  
Measuring Instruments ◽  
Precision Measuring

New high-precision measuring instruments

1963 ◽  
Vol 6 (6) ◽  
pp. 523-525
Author(s):  
P. P. Arapov
Keyword(s):  
High Precision ◽  
Measuring Instruments ◽  
Precision Measuring

High-precision measuring instruments

1961 ◽  
Vol 4 (4) ◽  
pp. 329-332
Author(s):  
P. P. Arapov
Keyword(s):  
High Precision ◽  
Measuring Instruments ◽  
Precision Measuring

Awards for high-precision measuring instruments

1964 ◽  
Vol 7 (10) ◽  
pp. 930-931
Author(s):  
P. P. Arapov
Keyword(s):  
High Precision ◽  
Measuring Instruments ◽  
Precision Measuring

New high-precision measuring instruments

1962 ◽  
Vol 5 (6) ◽  
pp. 526-528
Author(s):  
P. P. Arapov
Keyword(s):  
High Precision ◽  
Measuring Instruments ◽  
Precision Measuring

Research of a High Precision Time Synchronization Method Based on GPS Calibration

2014 ◽  
Vol 644-650 ◽  
pp. 1477-1480
Author(s):  
Bu Xin You ◽  
Jing Bu ◽  
Ming Hui Yin ◽  
Yun Zou
Keyword(s):  
Power System ◽  
High Precision ◽  
Time Synchronization ◽  
Least Squares Method ◽  
Generalized Least Squares ◽  
Measuring Instruments ◽  
Random Errors ◽  
Crystal Oscillator ◽  
Precision Measuring ◽  
Fitting Method

With the higher requirement for clock accuracy in power system, the accuracy and stability of wild area punctuality in GPS cannot meet the demands of the high–precision measuring instruments in power system. Firstly, this paper establishes the mathematical model of crystal oscillator clock error using polynomial fitting method. Then, it estimates the parameters of polynomial model with generalized least squares method. Thirdly, it updates the error-model of crystal oscillator clock dynamically for modifying its predicted error. The result shows, this method can not only predict accurate time error, but also filter out random errors well in GPS.

scholarly journals Measurement of Deviation of Roundnes

2013 ◽  
Vol 10 (1) ◽  
pp. 21-24
Author(s):  
Lenka Otrusinová ◽  
L. Čepová ◽  
Lenka Petřkovská
Keyword(s):  
High Precision ◽  
Optical Measurement ◽  
Optical Devices ◽  
Optical Measurements ◽  
Measuring Instruments ◽  
Measurement Instruments ◽  
Measuring Methods ◽  
Precision Measuring

Abstract For the measurement of roundness deviations are used different measuring methods and measuring Instruments from universal to high-precision measuring Instruments. Recently, optical measurement Instruments have irreplaceable role and get to the forefront due simpler process of measurement, accelerate measuring and large possibility to storage obtained data. Nowadays more and more successful optical measurements above touch measurement, but touch measurement still has an important role in companies. Therefore, in the experiment were measured the deviations of the roundness on devices measuring by touch method, and by the optical devices. The values of these measurements allowed their comparison and stastical evaluation.

Half division two-dimensional method for simple sinusoidal quantities parameters accurate measurement

2021 ◽  
pp. 16-21
Author(s):  
Kirill Yu. Solomentsev ◽  
Vyacheslav I. Lachin ◽  
Aleksandr E. Pasenchuk
Keyword(s):  
Measuring Instruments ◽  
Measured Signal ◽  
Two Dimensional ◽  
Measuring Device ◽  
New Approach ◽  
Precision Measuring ◽  
Useful Signal ◽  
Midpoint Method ◽  
Order Of Magnitude ◽  
Current Measuring

Several variants of half division two-dimensional method are proposed, which is the basis of a fundamentally new approach for constructing measuring instruments for sinusoidal or periodic electrical quantities. These measuring instruments are used in the diagnosis of electric power facilities. The most general variant, called midpoint method, is considered. The proposed midpoint method allows you to measure much smaller than using widespread methods, alternating currents or voltages, especially when changing the amplitude of the measured signal in very wide ranges, by 1–2 orders of magnitude. It is shown that using the midpoint method it is possible to suppress sinusoidal or periodic interference in the measuring path, in particular, to measure small alternating current when sinusoidal or periodic interference is 1–2 orders of magnitude higher than the useful signal. Based on the results of comparative tests, it was found that the current measuring device implementing the midpoint method is an order of magnitude more sensitive than the currently used high-precision measuring instruments.

scholarly journals Development of Large Surface Hardening Method for Carbon Steel with High Power CO2 Laser (1st Report)

1997 ◽  
Vol 63 (8) ◽  
pp. 1138-1142
Author(s):  
Masashi OIKAWA ◽  
Hiroyuki YAMAMOTO ◽  
Katsuhiro MINAMIDA ◽  
Hiromichi KAWASUMI
Keyword(s):  
Carbon Steel ◽  
Co2 Laser ◽  
High Power ◽  
Surface Hardening
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