Shape Measurement of Canned Food to Verify Hermetic Sealing
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概要
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A can swells due to gas produced from an inner food caused by poor hermetic sealing of the can. This paper presents a measurement for the bottom shape to detect a swelled can by using the millimeter-wave imaging. For get higher spatial resolution and an adjustable focal distance, two collimated beam lenses were applied to the measurement system. First, a configuration of the system was studied with the electrical field intensity and focal distance by using full wave electromagnetic simulation. Next, the bottom shapes of cans with different pressure were evaluated quantitatively using the system. A shape change of 0.5mm was detected with pressure difference of 50kPa, and it is reasonable considering actual dimension of the can shape. A potential of the proposed detection method was presented.
著者
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Yasuzumi Takenori
Department Of Electrical Engineering And Electronics Aoyama Gakuin University
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Hashimoto Osamu
Department Of Applied Physics Seieki University
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SUGA Ryosuke
Department of Electrical Engineering and Electronics, Aoyama Gakuin University
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IJUIN Taichi
Daiwa Can Company
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TAKANO Shigenori
Department of Electrical Engineering and Electronics, Aoyama Gakuin University
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TAKATOMI Tetsuya
Daiwa Can Company
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