| 摘要 |
PURPOSE: An apparatus and method is provided to measure the shape of curvature of cold rolled steel plate in an effective and accurate manner through a minimum configuration, while allowing the measurement apparatus to be installed even in a narrow space. CONSTITUTION: An apparatus comprises a laser distance measuring equipment(10) arranged to be rotatable, and which measure the distance from a steel plate(1); a rotating angle measurement equipment(30) for measuring rotating angle of the laser rangefinder; a filter(40) for filtering electrical signals output from the laser rangefinder and the rotating angle measurement equipment; an amplifier(50) for amplifying the filtered electrical signals; an A/D converter(60) for converting the amplified analog signal into a digital signal; and an analyzer(70) for calculating the curvature of the steel plate by using the distance information and rotating angle information. A method comprises a first step of measuring a distance(l) between a point of the steel plate and the rangefinder by using the rangefinder; a second step of measuring an angle(theta) of rotation of the rangefinder which rotates along the curved direction of the steel plate; a third step of calculating the vertical distance(a) between the rangefinder and the point of the steel plate measured by the rangefinder, by computing the rotating angle of the rangefinder and the distance through the formula: a = 1 x cos(theta); and a fourth step of analyzing the curvature of the steel plate by the vertical distance calculated in the third step.
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