Development of 1000 V Impulse Voltage Standard Measuring System

In gift things, social distancing is that the most vital reality. Moreover, the very fact is COVID-19 patient's initial symptom is vital sign is high. the explanation why, measure body temperature is most vital, however has to maintain social distancing. Whereas ancient thermometers can’t confirm of social distancing, wherever our developed contactless measuring system are able to do temperature on show by victimisation Arduino uno because the main management device also as MLX90615 because the infrared (IR) measuring system device. As a result, compared with the standard measuring system, it shows robust points like convenient reading, wide selection of temperature activity, and accuracy wherever temperature output is displayed digitally. Besides, it might be used all over attributable to its easy-handling

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Analysis of accuracy of 5-axis CNC milling machine through standard and modified circular test

Mechanik ◽

10.17814/mechanik.2018.10.136 ◽

2018 ◽

Vol 91 (10) ◽

pp. 822-824

Author(s):

Ryszard Wolny

Keyword(s):

Machine Tool ◽

Measuring System ◽

Milling Machine ◽

Cnc Milling ◽

Standard Measuring ◽

Cnc Milling Machine ◽

Circular Test ◽

Ball Bar ◽

Modified Test

In analysis of accuracy of 5-axis CNC milling machine measuring system with telescopic kinematic ball bar was used. Standard measuring test was made. The modified test was proposed with application of investigated inclined basis. The obtained results were compared. The accuracy of machine tool in indirect way was evaluated.

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Study on Linearity of Impulse Voltage Divider

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.986-987.1661 ◽

2014 ◽

Vol 986-987 ◽

pp. 1661-1665

Author(s):

Zhao Zhi Long ◽

Fei Lu ◽

Wen Ting Li

Keyword(s):

Low Voltage ◽

Voltage Divider ◽

Negative Polarity ◽

Measuring System ◽

National Standard ◽

Maximum Difference ◽

Positive Polarity ◽

Impulse Voltage ◽

Uncertainty Contribution ◽

Good Agreement

The uncertainty contribution related to linearity shall be considered in the calculation of measurement uncertainty when using the impulse voltage measuring system. Under the condition that the national standard is not yet established at present, the paper proposed an experimental method to measure the linearity of 600kV damped capacitive impulse divider (HCR600). The paper used low voltage resistance divider R200S to measure the linearity of generator, and obtained the linearity curve. With the increase of charging voltage, the linearity of divider can be obtained by measuring the charging voltage of impulse voltage generator precisely and its ratio of indicating value of the sample divider HCR600 after corrected. The result shows that the linearity of HCR600 decreases from +0.4% to-0.8%; the maximum difference between positive polarity and negative polarity is 0.14% and the linearity of negative polarity is superior to that of positive polarity. Besides, the paper used a 500kV resistance divider (SMR 7.7/ref500) calibrated by PTB to compare with HCR600, and obtained the linearity curve. By comparison, two curves show a good agreement, the maximum difference between them is 0.15% at the same voltage. The result shows that the method proposed in the paper can be used to measure the linearity of divider accurately. It also can be used as experimental verification in the process of the national standard establishing and to calibrate the ultrahigh voltage impulse voltage measuring equipments when equipments satisfy some requirements.

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