| 摘要 |
PURPOSE:To measure a roll shape in the inline state with a high precision, by measuring distances to the surface of the roll with plural range finders on a rack parallel with the roll and correcting these measured values with the quantity of displacement of the rack to the roll. CONSTITUTION:Many distance sensors 22 are attached onto a horizontal rack 21 parallel with a roll 11 and a reflective mirror 33 of a laser range finder 3 is attached in the center of the rack 21. In case of measurement, a position in the circumferential direction of the roll is specified by the output signal of an encoder 41, and measured values of sensors 22 and the quantity of displacement in the horizontal direction of the rack 21 due to the position of the reflective mirror 33 are inputted to an operating device 51. In the device 51, the quantity of displacement of the rack 21 at each point of sensors 22 is obtained in accordance with a prescribed arithmetic expression, and the distance measured value at each point is corrected with this quantity. Thus, the shape of the roll incorporated in a housing is measured with a high precision even if the rack 21 is deformed at a high temperature, and this method is used effectively for discrimination of the replacement time of the roll. |
