| 摘要 |
PURPOSE:To reduce the cost of facilities by allowing a noncontacting type position sensor to detect its gap from the surface of a roll by itself and set itself to specific width, and then elevating and lowering the roll and permitting the sensor to detect its aimed core by itself and align it to the center of the roll. CONSTITUTION:The sensor head 5 consisting of three ultrasonic probes 5' which are movable in the Z direction is so fitted that its aimed core L5 or L5' is at a tilt angle alpha to the axis LO or LO' of the roll. Further, the head 5 is moved slantingly to the Z direction and put closer to the work roll 1' and sets its gap S' from the roll surface to a specific value S while detecting the gap through the probes 5'. The reception level, however, drops because the head 5 slants, and accurate setting is not performed owing to a noise. In this state, the roll 1' is moved up and down properly while the head 5 is fixed and set at the position where the reception level is maximum, thereby aligning the aimed core L5' of the probe 5' to the center point O' of the roll 1'. Further, the profile of the roll 1 is measured by a known procedure. |
