【摘要】 大口径直缝埋弧焊管、螺旋缝埋弧焊管的在线或离线自动探伤 ,需要实时准确检测探头偏离焊道的位置偏移量 ΔL,至今所用方法都不令人满意。采用电磁方法和相对偏移量检测集成电路 ( IC) ,在钢管表面有大量水和蒸汽的恶劣条件下 ,仍能做到偏移量 ΔL的检测精度优于± 0 .5mm;配合伺服电机控制系统 ,最终可使探头跟踪焊道的精度达± 1 .5mm。更多还原

【Abstract】 Realtime and accurate positioning of the offset Δ L of probe tracking is necessary for on line or off line automatic inspection of large caliber straight seam submerged arc welded tubes and spirally welded tubes. So far the methods used are all unsatisfactory. By applying electromagnetic method and relative offset detection IC, under the conditions of water and vapour on the surface of steel tubes, the detection precision of offset Δ L can be superior than ±0.5mm. With the control of servomotor, the precision of the tracking will reach ±1.5mm.更多还原