FLAW DETECTOR Russian patent published in 2009 - IPC G01N21/88 G01B11/30 

FIELD: instrument making.

SUBSTANCE: invention relates to detection of surface defects representing material discontinuity. Proposed device comprises electromagnetic wave radiator and reflected signal photo receiver. The former represents laser with low-intensity visible electromagnetic wave range. The latter represents a photodiode. Flaw detector comprises also signal amplifier, comparator to generate "defect" short signal-pulse signal when laser incident beam gets on surface defects, one-shot multivibrator that converts aforesaid pulse into longer pulse sufficient for operator perception, light indicator operated by aforesaid "defect" signal and device to move controlled part. Note that signal generated in photo receiver by radiation reflected from party surface comes into amplifier and, thereafter, into comparator. Now, aforesaid signal comes from comparator to one-shot multivibrator, then, to light indicator and, at a time, to sound generator and, further on, to sound converter. Note here that controlled part is driven so that incident laser beam focus stays on controlled part surface.

EFFECT: expanded performances.

3 dwg