| 摘要 |
PURPOSE: A device for measuring the flatness of a steel sheet is provided to easily adjust output, thickness, length, and angle of a laser beam and to minimize external noise interference. CONSTITUTION: A device for measuring the flatness of a steel sheet comprises a laser radiating unit which includes a plurality of laser modules, and a measurement unit which obtains images of laser beams radiated from the laser radiating unit by using a plurality of CCD(charge coupled device) cameras. The laser module comprises a case, a laser diode module, a pair of current drivers(145), a pair of DB isolators(144), and an MCU(machine control unit)(141). The laser diode modules are arranged to be parallel with a set interval in the inside of the case and comprise a pair of laser diodes which radiate a pair of line laser beams. The current drivers are connected independently to the each laser diode module and regulate output by controlling a supply current to the diode modules. The DC isolator supplies power to each current driver by separating the power supplied to the laser modules. The MCU is connected to the current driver, thereby controlling an ON/OFF of the laser diode modules.
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