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Universal tool microscope measurement of large diameter uncertainty

6.97.06.8 combined sample standard deviation is widely ■ - A Sp a √ a √ 2 post (6.7 +7.1 +6.9 +7. O +6.82) m belly of a 6.9 m. You can get Abbe error limit error: as. HL a ± a ± a ± 0.25m. 4000 'a' a 'J ... where,MAC Cosmetics sale, L is the measured length (L million workers were taking the maximum range 200ram), H is the measurement of the workpiece surface of the glass surface above the platform, the distance between the two units are mm ,mac cosmetics wholesale, the unit of error obtained m (below). Distribution range of the input half-width n is 0.25m, for security reasons, assumed to be uniformly distributed, so the standard uncertainty components for the scale uncertainty of the valuation standard uncertainty caused by ) a ± (1 +) a ± 3 resistance distribution range of the input half-width n for the 3m, for security reasons, assumed to be uniformly distributed, so the standard uncertainty components for the No. 1 Yan Hao. etc.: Universal microscope measurement uncertainty for large diameter 31 uncertainty width of a. to 1.4m, for security reasons,ed hardy tøj, assumed to be U-shaped distribution, so standard uncertainty components are. ) calculations 2gm1.2 input standard uncertainty of h one by one the police have a e4 0.007 ¨ a police commander Superintendent m. inputs one by one o. h, the standard uncertainty ) ten 璺: was Z ≈] 0 'one by one 2 one 2 × 9.2899h the sensitivity coefficient of 019., November 2 ~ 4h2 a taste of a 1 ≈ a ten 1004X9.2899. 2.2 Summary of standard uncertainty of each input amount of standard uncertainty are summarized in Table 2. Table 2 summarizes the standard uncertainty 2.3 Calculation of combined standard uncertainty input, h is not related to each other,fred perry outlet, so the combined standard uncertainty can be press-style. (D) a Σf · U2 () i A 1-72. X. 110. a 17284m. 2,abercrombie uk, U-k × 0.26mm. Report of the expanded uncertainty is combined uncertainty a normal distribution, the measurement results is estimated to normal. For the normal distribution, the corresponding 95% confidence probability of about .5 conclusion of the class with the image method in a small circle of large diameter workpieces to be measured, its measurement uncertainty is large, especially the 1 / h (chord length and chord ratio) is large, the uncertainty at a rapid pace, as necessary, consider using coordinate measuring machine touch to ensure that accuracy. 【References [1: Fei Yetai, error theory and data processing EM?, Beijing: Mechanical Industry Press, 1987.

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