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Yu, Dong-Jun;Lee, Sang-Kwon
- Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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- 2004.11a
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- pp.160-165
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- 2004
In these days, the people living in the urban is suffer from the environmental noise because the number of car increase in the city, and a lot of new industrial complex is made in the urban every. But there is no suitable system for measurement and management of environmental noise. Therefore, in this research, a new system for the measurement, characteristic analysis and evaluation, management of environmental noise using Internet communication is developed. The system includes the environmental noise measurement equipment and the controller for the noise measurement, analysis and evaluation, management.
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Joo, Ki-Nam;Kim, Seung-Woo
- Journal of the Optical Society of Korea
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- v.16 no.4
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- pp.396-400
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- 2012
We introduce a combined technique and the mathematical description for distance measurements using a femtosecond pulse laser in a long range and a fine resolution. For distance measurements, the maximum measurable range can be extended by combining measurement results from several different methods while requiring relationships between the different measurement uncertainties and unambiguity ranges. This paper briefly explains why the uncertainty of a rough measurement technique (RMT) should be, at least, smaller than the half unambiguity range of a fine measurement technique (FMT) in order to combine a FMT with a RMT. Further discussions about the total measurement range, resolution, and uncertainty for various optical measurement techniques are also discussed.
https://doi.org/10.3807/JOSK.2012.16.4.396 인용 PDF KSCI

Kim, Hyun-Soo;Hong, Seong-Wook
- Journal of the Korean Society for Precision Engineering
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- v.11 no.6
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- pp.168-178
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- 1994
This paper presents an optical surface roughness sensor developed for intermediate- process measurement on the machine. The light scattering method is adopted for the sensor, which is designed conpact and flexible enough to apply to 'on the machine' measurement of surface roughness. The developed sensor has special features such that it makes use, as the measurement parameter, of the ratio between fluxes of the incident light, and the specularly and partly diffusely reflected light, and that it can adjust the incident light angle. The experimental investigation reveals not only the sensor has good performance as a surface roughness sensor but the sensor is very robust so as to be useful in in-process measurement.
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