Control apparatus for ventilating a tunnel
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United States of America Patent
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Apr 20, 2004
Grant Date -
N/A
app pub date -
Sep 12, 2000
filing date -
Sep 13, 1999
priority date (Note) -
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Abstract
A control apparatus for a ventilator that ventilates a tunnel in response to visibility of the inside of the tunnel, including at least one picture image input device configured to take a picture of the inside of the tunnel, a visibility index determination device configured to determine a visibility index value on the basis of a picture image data of the picture taken by the picture image input device in light of a table representing a relationship between the picture image data and the visibility index value, a feedback controller configured to calculate an operation command for operating the ventilator on the basis of a feedback control value calculated by comparing the visibility index value with a target value of the visibility index value.
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