Abstract: An improved method and device for reflectively measuring a subject such as a throat area in a vane ring for a gas turbine engine uses improved lighting arrangements to improve the quality of reflection to thereby reduce problems associated with poor quality reflection which may adversely affect the image processing and thus reduce the accuracy of measurement.

Abstract: A method and device for optically measuring throat area in a vane ring for a gas turbine engine, the method according to one aspect of the invention following the steps of: placing the vane ring on a fixture with the periphery of each throat within an optical measuring field of view; positioning a primary radiation source to cast an area of shadow on the vane ring delineating the throat as a dark area surrounded by an area of reflectance; capturing an image of the dark area with a radiation detector; analyzing the image to acquire a dimensional data of the dark area, proportional to the absolute value of throat dimensions; progressively capturing and analyzing images from each of the individual throats; then processing and calibrating the dimensional data of each image to account for scaling and viewing direction (perspective distortion) to acquire an absolute value for the composite throat area of the vane ring.

Abstract: An improved method and device for reflectively measuring a subject such as a throat area in a vane ring for a gas turbine engine uses improved lighting arrangements to improve the quality of reflection to thereby reduce problems associated with poor quality reflection which may adversely affect the image processing and thus reduce the accuracy of measurement.

Abstract: A device and method for measuring an area such as a throat area in a vane ring for gas turbine engines. Measurement inaccuracy introduced by image size changes as a result of the position deviation of the selected throat relative to a desired datum is reduced as a result of the improved system disclosed.

Abstract: A method and device for optically measuring throat area in a vane ring for a gas turbine engine following the steps of: placing the vane ring on a fixture with the periphery of each throat within an optical measuring field of view; positioning a primary radiation source to cast an area of shadow on the vane ring delineating the throat as a dark area surrounded by an area of reflectance; capturing an image of the dark area with a radiation detector; analyzing the image to acquire a dimensional data of the dark area, proportional to the absolute value of throat dimensions; progressively capturing and analyzing images from each of the individual throats; then processing and calibrating the dimensional data of each image to account for scaling and viewing direction (perspective distortion) to acquire an absolute value for the composite throat area of the vane ring.

Abstract: Spectrophotometric analysis device having a feeder circuit of a test stand. The analysis device has two distinct spectrophotometers facing the same test stand, especially in order to be able to cover spectra with wavelengths that are separate and included in the wavelengths on either side of the visible range. A first spectrophotometer covers the spectrum of the near and mean infrared ranges while a second spectrophotometer covers the spectrum of the ultraviolet and visible ranges. This analysis device provides especially for the spectrophotometric determination of the different constituents contained in fluids to be analysed, such as wine, fruit juice or blood.