Method for the non-destructive testing of a casing
First Claim
1. A method for non-destructive testing of a heating of a part made from polymer material, the method comprising:
- a) carrying out a measurement by infrared spectroscopy at a region of said part to be tested and extracting therefrom test values comprising at least one selected from the group of absorbance values and transmittance values according to a spatial frequency;
b) from test values, determining an interval of spatial frequencies relating to an oxidation of a polymer of said region of the part; and
c) from the test values in said interval of spatial frequencies, determining a period of time during which said region of the part to be tested has been subjected to a given heating temperature and determining said given heating temperature, using a reference database comprising sample values including at least one selected from the group of absorbance measurements and transmittance measurements, the sample values established over a plurality of reference samples made from polymer material that have been subjected to a given temperature during a given period of time, both the given temperature and the given period of time varying among the plurality of reference samples so as to cover a plurality of periods of time and a plurality of temperatures.
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Abstract
A method for the non-destructive testing of the heating of a part made from polymer material, the method comprising the following steps: a) carrying out a measurement by infrared spectroscopy on a part to be tested and extracting therefrom at least one of absorbance values and transmittance values according to a spatial frequency; and b) from the measurement of at least one of absorbance and transmittance, determining the period of time during which said region of the part to be tested has been subjected to a given heating temperature and determining said heating temperature, using a reference database comprising at least one of absorbance measurements and transmittance measurements, the measurements established over a plurality of reference samples made from polymer material that have been subjected to a given temperature during a given period of time.
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Citations
7 Claims
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1. A method for non-destructive testing of a heating of a part made from polymer material, the method comprising:
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a) carrying out a measurement by infrared spectroscopy at a region of said part to be tested and extracting therefrom test values comprising at least one selected from the group of absorbance values and transmittance values according to a spatial frequency; b) from test values, determining an interval of spatial frequencies relating to an oxidation of a polymer of said region of the part; and c) from the test values in said interval of spatial frequencies, determining a period of time during which said region of the part to be tested has been subjected to a given heating temperature and determining said given heating temperature, using a reference database comprising sample values including at least one selected from the group of absorbance measurements and transmittance measurements, the sample values established over a plurality of reference samples made from polymer material that have been subjected to a given temperature during a given period of time, both the given temperature and the given period of time varying among the plurality of reference samples so as to cover a plurality of periods of time and a plurality of temperatures. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification