制绳钢丝疲劳测试声发射检测去噪方法  

The Method of Noise Elimination for Acoustic Elmission Detection of Steel Wire during Fatigue Test

作　　者：邵永波[1] 于大安[1] 王师[1] 朱祖铭[2] 尹万全[2] 

机构地区：[1]东北大学信息科学与工程学院,沈阳110006 [2]中国科学院金属研究所材料疲劳与断裂国家重点实验室,沈阳110015

出　　处：《物理测试》1998年第6期21-24,共4页Physics Examination and Testing

摘　　要：在声发射(AE)换能器与制绳钢丝之间加入特制的前置玻璃罩实现了换能器的安装及声发射信号的有效拾取。在夹具和钢丝之间加入四层钢铝界面可使机械噪音衰减15dB左右,在夹具渐扩出口处的钢丝和铝片之间加入软绝缘材料可有效地防止摩擦噪音,使系统阈值降低大约9dB。同时采用定位排噪技术,将使钢丝疲劳过程AE测试结果更为可靠。AE transducer is attached on steel wire by adding a special case between AE transducer and wire, consequently, AE signal can be picked up effectively. The mechanical noise can be attenuated about 15dB by four layers of steel-aluminium interface between clip and wire. The nibbing noise can be prevented by adding the soft isolating materials between wire and its closest slice of aluminium at the position of clip edge, which results in 9dB drop of AE threshold. By using location technique simultaneously, the AE result is more reliable for fatigue test of wire.

关 键 词：制绳钢丝 声发射 机械噪音 疲劳测试 换能器 

分 类 号：TG115.285[金属学及工艺—物理冶金] TB553[金属学及工艺—金属学]