| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of detecting an extracting position of a heated material in a heating furnace with high accuracy without impairing an operation. SOLUTION: This invention provides a method of detecting the extracting position of the heated material M conveyed in the direction roughly orthogonal to the longitudinal direction of the heated material M in the heating furnace 100. A plurality of laser distance meters 10 are disposed along the direction orthogonal to the conveying direction at positions separating in the conveying direction from a furnace wall 101 of the heating furnace positioned at a downstream side in the conveying direction of the heated material at an outer portion of the heating furnace, laser beams horizontally projecting from the laser distance meters are applied to the heated material through openings 102 formed on the furnace wall to measure distances from the laser distance meters to the heated material, and the extracting position of the heated material is detected on the basis of the measured distance to the heated material. COPYRIGHT: (C)2009,JPO&INPIT
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