Design and implementation of four-channel differential ultrasonic stress detector
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摘要: 金属构件在加工和服役过程中产生的残余应力会使其产生形变或应力疲劳,严重危害关键结构的安全性。现有超声应力检测技术存在温度耦合效应大且无法检测不同深度应力等问题,基于临界折射纵波的声弹性原理,设计并研制了四通道差分式超声应力检测仪。该仪器基于现场可编程门阵列(FPGA)设计,由超声发射电路、接收电路、信号处理电路和操作软件等部分组成。配合定制的组合式超声激励探头与双宽带接收探头,可以实现4个不同频率的超声临界折射纵波应力同步测量,有效地避免了温度耦合和不同频率探头声学耦合的问题。通过标准拉伸试验对铝合金和钛合金试样进行了应力测量,表明该仪器可以满足四通道应力测量。Abstract: The residual stress of metal components in the process of processing and service causes deformation and even stress fatigue, which seriously endangers the safety of the key structure. In order to avoid the effect of temperature and measure internal stress gradient at crucial components, a differential four-channel ultrasonic stress detector was designed based on acoustoelastic effect of longitudinal critical refraction wave. The detector was designed based on field programmable gate array (FPGA) and mainly consisted of ultrasonic transmitting and receiving circuit, signal processing circuit and operation software. The detector equipped four-frequency ultrasonic transmitter probe and two broadband receiver probes to eliminate coupling errors caused by temperature and probe replacement. The stress measurement of aluminum and titanium alloy structures was carried out by standard tensile test, and proved the capability of four-channel measurement of stress.
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[1] 蒋文春,罗云,万娱,等.焊接残余应力计算、测试与调控的研究进展[J].机械工程学报,2021,57(16):306-328. [2] 贾春燕.机加工中残余应力的产生和处理[J].机械,2010,37(增1):79-81. [3] 巴发海,刘宇希.残余应力的产生及其对构件性能的影响[J].无损检测,2020,42(9):1-5. [4] 巴发海,刘宇希.残余应力X射线测试结果准确性的影响因素[J].无损检测,2020,42(11):6-9. [5] 王忠诚,胡向义,张建华.基于逆磁致伸缩效应应力无损检测技术的总结与展望[J].中国测试,2020,46(12):119-128. [6] HE J B,LI Z H,TENG J,et al.Absolute stress field measurement in structural steel members using the Lcr wave method[J].Measurement,2018,122:679-687.
[7] HU H W,ZOU Z C,JIANG Y B,et al.Finite element simulation and experimental study of residual stress testing using nonlinear ultrasonic surface wave technique[J].Applied Acoustics,2019,154:11-17.
[8] 原帅,赵晓春,廖林,等.基于超声高阶兰姆波的薄板应力测量技术研究[J].压电与声光,2022,44(1):144-150. [9] STEPINSKI T.Novel instrument for inspecting rock bolt integrity using ultrasonic guided waves[J].Measurement,2021,177:109271.
[10] 李海权, 潘丽娜, 刘晴岩. 超声波应力测量系统的开发研究[C]//第三届无损检测高等教育发展论坛暨电磁涡流无损检测技术交流会. 太原: [出版者不详],2009. [11] 宋文涛.残余应力超声无损检测与调控技术研究[D].北京:北京理工大学,2016. [12] 李玉坤,于文广,李玉星,等.超声临界折射纵波测量应力的温度影响[J].中国石油大学学报(自然科学版),2021,45(2):134-140. [13] 郭沫呈,苟国庆,陈兵,等.温度影响下的螺栓轴向应力超声检测[J].无损检测,2022,44(3):45-48,67. [14] HUGHES D S,KELLY J L.Second-order elastic deformation of solids[J].Physical Review,1953,92(5):1145-1149.
[15] LEON-SALAMANCA T,BRAY D F.Residual stress measurement in steel plates and welds using critically refracted longitudinal (LCR) waves[J].Research in Nondestructive Evaluation,1996,7(4):169-184.
[16] 杨剑,高成强,刘晓方.超声激励方式对检测信号的影响[J].无损检测,2010,32(1):36-38. [17] 詹绍正,杨鹏飞,王丹,等.超声波激发参数对检测结果的影响[J].环境技术,2021,39(5):143-148.
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