Method for detecting moisture in a honeycomb panel
First Claim
1. A method of detecting moisture in a honeycomb panel, comprising the steps of:
- applying a reference position mark heater at a reference marking position within a predetermined area of a surface of the honeycomb panel;
energizing the reference position mark heater;
heating the predetermined area;
photographing the predetermined area, including the reference position mark heater, with an infrared radiation thermometer to obtain infrared image signals of said predetermined area and said reference position mark heater;
displaying an infrared image of said predetermined area and said reference position mark heater;
discriminating abnormal portions of the predetermined area containing moisture on the displayed infrared image;
continuously heating the predetermined area while continuously displaying the infrared images of both abnormal portions containing moisture and normal portions free from moisture;
measuring temperature-related characteristics of the abnormal portions and the normal portions;
detecting the presence of moisture at the abnormal portions on the basis of comparisons between the temperature-related characteristics of the abnormal portions and the temperature-related characteristics of the normal portion; and
locating the abnormal portions in the form of coordinates on the basis of said displayed infrared image of said reference position mark heater.
2 Assignments
0 Petitions
Accused Products
Abstract
To improve the detection precision and detection efficiency and further to automatize the detection process, moisture in a honeycomb panel is detected as follows: the honeycomb panel is heated by a lamp; the surface temperature of the heated construction is measured by an infrared radiation thermometer; the measured temperature is displayed to roughly discriminate an abnormal portion (i.e., a portion containing moisture); the honeycomb panel is further heated continuously to detect temperature-change-rates at both abnormal and normal portions (i.e., a portion not containing moisture); and the two temperature-change-rates are compared with each other to discriminate a presence of moisture.
24 Citations
7 Claims
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1. A method of detecting moisture in a honeycomb panel, comprising the steps of:
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applying a reference position mark heater at a reference marking position within a predetermined area of a surface of the honeycomb panel; energizing the reference position mark heater; heating the predetermined area; photographing the predetermined area, including the reference position mark heater, with an infrared radiation thermometer to obtain infrared image signals of said predetermined area and said reference position mark heater; displaying an infrared image of said predetermined area and said reference position mark heater; discriminating abnormal portions of the predetermined area containing moisture on the displayed infrared image; continuously heating the predetermined area while continuously displaying the infrared images of both abnormal portions containing moisture and normal portions free from moisture; measuring temperature-related characteristics of the abnormal portions and the normal portions; detecting the presence of moisture at the abnormal portions on the basis of comparisons between the temperature-related characteristics of the abnormal portions and the temperature-related characteristics of the normal portion; and locating the abnormal portions in the form of coordinates on the basis of said displayed infrared image of said reference position mark heater. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification