第19卷第1期 2011年1月
文章编号1004-924X(2011)01-0153-08
光学精密工程
Optics and Precision Engineering
Vol.19No, 1
Jan.2011
探测精密零部件加工裂纹的声发射实时监测仪
郑耿峰1.2,马舜峰1.2，金龙旭1
（1.中国科学院长春光学精密机械与物理研究所，吉林长春130033；
2.中国科学院研究生院，北京100039)
摘要：为了提高航天航空精密零部件加工设备的可靠性、安全性，缩短研制周期，提出了一种实时监测精密零部件加工过程产生裂纹的方法，并根据此方法，研制了-台基于TI公司最新浮点数字信号处理器一TMS320F28335的精密零部件裂纹实时监测仪的样机。考虑在线实时监测的需要，采用了基于声发射(AE)技术的方案。介绍了裂纹实时监测方法的总体方案及其相应系统的硬件组成，描述了数字信号处理算法，并对裂纹实时监测仪样机进行了试验验证。试验结果显
示，研制的样机能达到无漏检，误检率为1.2%，验证了本文所提方法的有效性。关键调：声发射技术精密零部件金属裂纹；实时监测
中图分类号：TG115;TB51
文默标识码：A
doi;10.3788/OPE.20111901.0153
Acoustic emission real-time detecting instruments formetal cracks
in machining exact details
ZHENG Geng-fengl-2, MA Shun-fengl-2,JIN Long-xu
(l.ChangchunInstituteof Optics,FineMechanicsandPhysics, ChineseAcademy of Sciences,Changchun130033,China;
2.GraduateUniversity of ChineseAcademy of Sciences,Beijing 100039,China)
Abstract: To improve the reliability and security of maching exact details in space equipment and to shorten their developing periods,a real-time detecting method for the metal cracks in machining exact details was presented. According to this method, a prototype machine of real-time detecting instru-ment for the cracks of exact details based on a float digital signal processor-TMS320F28335 was de-veloped. In consideration of online real-time detecting, the Acoustic Emission(AE) technique was a-dopted in the method. The general scheme for detecting metal cracks in real time was introduced and the hardware composition and software algorithm corresponding to the system were analyzed in detail Finally, the verification experiments to the prototype machine of real-time detecting instrument were carried out. The experimental results show that the prototype machine has high performance. Its false detecting ratio reaches 1. 2% and has no missing cracks,which validates that the AE real-time detec
收稿日期：2010-04-23；修订日期：2010-07-13.
基金项目：国家863高技术研究发展计划基金资助项目（No,863-2-5-1-13B)