Abstract : in this article , the optimization of surface crack detection of speed reducer gear was made using fuzzy set theory , the result show that the rotation magnetic field is the best way of surface crack detection and lots of extending surface fatigue cracks were found in practice 文摘:采用模糊集的貼近度計(jì)算對(duì)齒輪表面探傷方法進(jìn)行了優(yōu)化選擇,表明旋轉(zhuǎn)磁場(chǎng)探傷是齒輪表面探傷的最佳方法,在實(shí)用中檢測(cè)出大量的正在延伸擴(kuò)展的表面疲勞裂紋。