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Measurement and automatic control of radial clearance in instrument ball bearings

โœ Scribed by B. Ya. Rubenchik


Publisher
Springer US
Year
1976
Tongue
English
Weight
382 KB
Volume
19
Category
Article
ISSN
0543-1972

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Measurement of visual index in tunnels u
โœ Jongtaek Park; Donghyun Seo; Bonjeong Koo; Youngil Park ๐Ÿ“‚ Article ๐Ÿ“… 2004 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 290 KB

A visual index measurement scheme that can be applied to a tunnel environment is proposed. To check the ventilation condition, a relative visibility is measured using a laser diode (LD) with wavelength of 880 nm. The LD is modulated with a 10 kHz sinusoidal signal to be used for a homodyne detection