Quantum technology has broken through the bottleneck of traditional technology in ensuring information security,improving computing speed and improving measurement accuracy,and has become the source of innovation in major technological fields such as information,energy and materials.The quan-tum precision measurement technology in this paper is based on the high-precision scanning technology of diamond probe developed in China,which can realize the magnetic imaging with high spatial resolution and high sensitivity,and can accurately measure the surface defects of ferromagnetic material which is widely used in special equipment.By using a highly sensitive quantum sensor based on nitrogen-vacancy(NV)center in diamond,surface crack detection experiments of A1 test piece can be completed,and defects at a depth of 15 μm on ferromagnetic material surface can be identified and detected.This technology has great-ly improved the testing precision of traditional surface non-destructive testing technology,and has many advantages such as buildable with signal image,readable and quantitative analyzable.This research will cer-tainly guarantee special equipment safety and promote society and economic development.
万方数据
维普
