EDDY-CURRENT FLAW DETECTOR

摘要

non-destructive test, detection of flaws in articles made of current-conducting materials and under dielectric coats. SUBSTANCE: eddy-current flaw detector is intended for detection of structural discontinuity in body parts of automobiles. It incorporates sensor with cylindrical case that houses printed circuit board having narrow and broad parts. Broad part of printed circuit board carries high-frequency generator connected to detector and measurement coil anchored on narrow part of printed circuit board in lug with extension piece. Broad part of printed circuit board is tightened up by compensation damper. Calibration button is located on case of sensor. Signals from sensor are transmitted over low-frequency cable to electron unit equipped with microprocessor provided with algorithm for processing of control signals and indication and sensitivity control, pointer, audio and light indicators. Given flaw detector provides for positive detection of individual cracks with width up to 50 mukm for 10-20 s, for detection of structural discontinuities through dielectric layer of 2.0 mm thick in brazed in and protected sections in metal of automobile body and in welds thoroughly filled with putty in the course of 1-2 min. EFFECT: raised functional capabilities of flaw detector. 3 dwg