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- Bååth, Lars, 1948-
(författare)
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A method to simultaneously measuring the position of more than one surface in metallurgical processes
- 1997
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Patent (populärvet., debatt m.m.)abstract
- A method for measuring the position of at least one surface in a metallurgical process which includes the steps of providing a metallurgical melt, the metallurgical melt including at least a metal portion and a slag layer, providing a signal generator for generating signals at a plurality of frequencies over a frequency band, and providing an antenna for receiving the signals generated by the signal generator and for transmitting circularly polarized radio waves at the plurality of frequencies over the frequency band. The invention further includes the steps of disposing the antenna adjacent the metallurgical melt, transmitting the circularly polarized radio waves from the antenna toward the metallurgical melt, the circularly polarized radio waves being transmitted by the antenna at the plurality of frequencies over the frequency band, receiving reflected images of the transmitted radio waves through the antenna, the received reflected images of the transmitted radio waves having a substantially opposite circular polarization from the transmitted circularly polarized radio waves, determining a phase displacement between the transmitted radio waves and the received reflected images of the transmitted radio waves, transforming the determined phase displacement from a frequency to a time plane, and determining from the time plane transform a position of at least one surface of at least one of the metal portion and the slag layer.
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- Bååth, Lars B., 1948-
(författare)
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Method and device for contactless level and interface detection
- 2006
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Patent (populärvet., debatt m.m.)abstract
- Method and apparatus for determining the thickness of material layers of a container-held substance comprising a first material disposed in an upper layer and a second material disposed in a lower layer, by transmitting a radio signal through the substance towards a container portion; receiving reflected signals from a surface of the upper layer, a surface of the second layer, and the container portion; varying the frequency of the transmitted signal to determine phase displacement between transmitted and reflected signals; determining optical distances to the surfaces and the container portion, dependent on the phase displacements; determining the thickness of one of said layers dependent on phase displacement through and index of refraction of that layer; and determining the thickness of the other layer dependent on the thickness of said one of said layers.
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- Bååth, Lars B., 1948-
(författare)
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Method for analysing a substance in a container
- 2006
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Patent (populärvet., debatt m.m.)abstract
- Method and apparatus for analyzing a substance in a container, the method comprising the steps of: disposing antenna means (3) at a predetermined geometrical distance (L) from a container portion (13); transmitting a signal from said antenna means through a surface portion (12) of the substance towards said container portion; receiving a first reflected signal in said antenna means from said container portion; determining a geometrical distance (L1) from the surface portion to the container portion; varying the frequency of the transmitted signal to determine a first phase displacement between the transmitted signal and the first reflected signal; determining an optical distance from the surface portion to the container portion based on the first phase displacement; and determining the index of refraction (nt) of said substance based on the optical and geometrical from the surface portion to the container portion.
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- Bååth, Lars B., 1948-
(författare)
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mm VLBI
- 1993
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Ingår i: VLBI Technology – Progress and Future Observational Possibilities. - Tokyo : Terra Scientific Publishing Company. ; , s. 70-74
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Bokkapitel (refereegranskat)abstract
- Very long Baseline Interferometry (VLBI) has now made its break-through into the mm wavelength regime. A global VLBI array has produced maps of radio sources at 3 mm since 1988 and development is under way to improve the sensitivity for VLBI also at 1 mm. This contribution discusses the present state of mm VLBI and the future developments.
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- Bååth, Lars, 1948-
(författare)
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Functional surfaces
- 2012
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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- Bååth, Lars, 1948-
(författare)
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Functional surfaces
- 2011
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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