Interferometric JFTOT tube deposit measuring device
US5293218A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Jun 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2805
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Jet fuels are tested for thermal stability by passing the fuel over a hea metal tube and measuring the amount of residue deposited as a film on the tube as a result of chemical changes to the fuel. The thickness distribution and volume of a deposited film on a tube are calculated by scanning the length of the tube with an optical probe, shining light onto the tube, measuring the intensity of reflected light of a preselected wavelength from the tube, and correlating the reflected light intensity with positions on the tube. The tube is then partially rotated, and the process is repeated until the entire surface of the tube is scanned. The volumes of each longitudinal slice of the tube are summed to give the total deposit volume on the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.