Determn. of surface profile of conducting metal workpieces - esp. for automatic height adjustment of welding burner, where Eddy-current probe monitors surface profile

摘要: An eddy current probe contg. at least one search coil (B) is located above a metal surface on slide, which driven along slideway the surface. The electric signals emitted by vary with distance of from surface; and signls are fed into an electronic circuit includes memory in actual profile (Sa) can be stored. Profile pref. compared desired (Sref), any difference used process control, e.g. for automatic adjustment height burner to weld two plates together. slide its motor feeding position circuit.