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    • 2. 发明专利
    • HYDRAULIC ROLLING REDUCTION TYPE ROLLING MILL
    • JPH11156412A
    • 1999-06-15
    • JP32978697
    • 1997-12-01
    • NIPPON KOKAN KKDAIICHI ELECTRIC
    • MATSUO GIICHIFUJII HIROSHISATO HIROSHI
    • F15B11/08B21B31/32B21B37/00B21B37/62
    • PROBLEM TO BE SOLVED: To keep the height of a pass line to be constant, to enable the fine adjustment of a rolling reduction quantity and to improve the dimensional precision of a rolled material by using a two-way discharging fixed volume or variable volume hydraulic pump directly connected with a motor as the hydraulic press source and executing synchronous roll-down and/or synchronous roll-up with a hybrid actuator. SOLUTION: The rolling-reduction device 20 is provided with the hybrid actuator (driving source integral type hydraulic actuator) and arranged to each of the upper and the lower roll chocks 2, 4 at the right and the left sides in a rolling mill body l so that it is possible to execute the roll-down during rolling. In this rollingreduction device 20, a single-rod type double acting cylinder fixed to the rolling-mill body 1 is incorporated, and the two-way discharging type hydraulic pump directly connected with the motor, a liquid quantity difference absorbing circuit in the head side and the rod side at the time of working a cylinder and close type tanks for compressed gas and working liquid, are integrated. At the time of rolling, the feedback of displacing information of the cylinder rod is executed with a linear scale and this information is compared with an input positional command, and the input of the motor in the hydraulic pump is controlled to adjust the rolling reduction quantity.
    • 6. 发明专利
    • SENSOR FOR SMOKE/DUST GENERATION USING IMAGE PROCESSING OPERATION
    • JPH04358285A
    • 1992-12-11
    • JP13272591
    • 1991-06-04
    • NIPPON KOKAN KK
    • HIRANO MINORUSATO HIROSHIINAMOTO TETSUO
    • G08B21/00G06T1/00G08B23/00G08B25/00
    • PURPOSE:To prevent the generation of the smoke and the dust by decomposing the picture element of a fluctuated image and differentiating the element after the picture elements of several sheets of images are moved and averaged and then deciding the generation of the smoke and the dust according to the level of the peak value drawn by the first order differential coefficient. CONSTITUTION:The transition of luminance of each picture element obtained by moving and averaging an image 1 whose specific viewfield is photographed by a camera 12 as the time passes is defined as 8 signal that can be differentiated to the lapse of time. This signal is differentiated with the time defined as an independent variable and the first order differential coefficient is obtained. Then the smoke/dust generation images are presumed when the rate of the number of picture elements where the peak value of the first order differential coefficient exceeds a fixed level is larger then the fixed value. Then an alarm is produced. Thus it is possible to quickly end surely prevent the generation of the smoke and the dust, to greatly contribute to preventing the air pollution, end to save the labor required for supervisory of generation of the smoke end the dust.