Fuel cloud point or freeze point sensor with collinear optical geometry

摘要

A system includes a sensing cell having a walled structure configured to receive a fuel sample within an interior space of the walled structure. The sensing cell also has at least one cooling surface located on at least a portion of the walled structure and configured to cool the fuel sample. The sensing cell further has an optical port configured to couple to one or more optical fibers and to provide first radiation to the fuel sample. In addition, the sensing cell has a mirror configured to reflect the first radiation in order to provide second radiation to the optical port. The optical port defines a collinear optical geometry for providing the first radiation to the fuel sample and receiving the second radiation through the fuel sample. The system also includes at least one cooler configured to cool the fuel sample in the sensing cell by cooling the at least one cooling surface.

主权项

1. An apparatus comprising:
a walled structure configured to receive a fuel sample within an interior space of the walled structure; at least one cooling surface located on at least a portion of the walled structure and configured to cool the fuel sample; a first optical port positioned on a first wall of the walled structure, the first optical port configured to provide first radiation to the fuel sample; a mirror positioned on a second wall of the wall structure opposite from the first wall, the mirror configured to reflect the first radiation in order to provide second radiation to the first optical port; and a second optical port positioned on the first wall adjacent to the first optical port, the second optical port configured to receive third radiation reflected by the mirror for diffuse measurements for the fuel sample; wherein the first optical port defines a collinear optical geometry for providing the first radiation to the fuel sample and receiving the second radiation through the fuel sample.