Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Reexamination Certificate
2005-06-07
2005-06-07
Hellner, Mark (Department: 3663)
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
Reexamination Certificate
active
06903812
ABSTRACT:
The disclosed method of measuring the flow of a fluid with a porous particulate ceramic tracer and an optical instrument is characterized in that spherical particles having diameters in the range of 0.5 to 150 μm are used as the tracer. Inasmuch as the tracer particles for flow measurement are spherical, the sectional area of scattered light to be detected by an optical sensor means is constant regardless of the orientation of particles. Furthermore, spherical particles have no surface irregularities that might cause concatenation so that individual particles are not agglomerated in tracking a fluid flow, thus contributing to improved measurement accuracy.
REFERENCES:
patent: 6118519 (2000-09-01), Ipponmatsu et al.
patent: 6414748 (2002-07-01), Ipponmatsu et al.
Hirano Akira
Ikeda Yuji
Ipponmatsu Masamichi
Nakajima Tsuyoshi
Nishigaki Masashi
Hellner Mark
Jordan and Hamburg LLP
Osaka Gas Company Limited
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