Optical Fiber Sensor for Measuring Physical Properties of Liquids.
Patent Application, Filed 3 Jan 90,
DEPARTMENT OF THE NAVY WASHINGTON DC
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This invention relates to a device for measuring the physical properties of liquids and in particular to a device for measuring physical properties of liquids using the interference of light waves. It is well known in the art to use fiber optic systems for temperature measurement and monitoring of liquids. For example, these flammable liquids because non-electrical sensing devices eliminate a source of explosion hazard associated with electrical temperature monitoring systems. The thermal conductivities of liquids are often measured because the thermal conductivities of liquids are required for various heat transfer analyses. These conductivities are commonly obtained with a transient hot-wire apparatus. In this technique a thin platinum wire, serving as both a heating element and a thermometer, is heated resistively with a current pulse of about one second duration.
- Electrical and Electronic Equipment