Method and apparatus for measuring wear in the lining of refractory furnaces

摘要: A continuous wave laser light beam is directed at the refractory lining within a furnace vessel, and displacement as measured by self-scanned linear array of scattered from nominal or reference position to provide an indication wear damage. The video signal received receiver provides information for mapping worn damaged areas vessel so that such may be repaired gunning spray nozzle. inspection apparatus includes optical filter which temperature controlled prevent wavelength shifts away wavelength. electronic processing circuitry voltage oscillator responsive average background level modifying scan rate compensate changes in level. threshold against reflected compared also function Consequently, system self-compensating radiation temperature. lowered into hot following each heat without need cool vessel. mechanically scanned vertically angularly large number data points.