一种用于超声非线性试验的压力监测夹持装置
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摘要
针对通过PZT(锆钛酸铅)晶片-探头穿透法测量非线性系数时,存在测量数据可重复性差的问题,设计了一种辅助RITEC RAM-5000SNAP非线性高能超声测试系统测量材料非线性的压力监测夹持装置,该装置可实现对材料贴合力度的实时监控,提高逐点测量速度,减小耦合条件对测量结果的干扰。使用结果表明,该装置可大大提高超声波对微小缺陷的灵敏度,增强超声波的穿透率和孔隙检测的精度。
The non-linear coefficient is measured by the PZT chip-probe penetration method.The measurement data has poor repeatability.In this paper,apressure monitoring and clamping device for measuring the nonlinearity of materials in RITEC RAM-5000 SNAP nonlinear high-energy ultrasonic testing system is designed.It can realize the real-time monitoring of the bonding force of materials,improve the speed of point-by-point measurement and reduce the interference of the coupling conditions on the measurement results.The results show that the device can greatly improve the sensitivity of ultrasound to micro-defects,and enhance the penetration rate of ultrasound and the accuracy of pore detection.
The non-linear coefficient is measured by the PZT chip-probe penetration method.The measurement data has poor repeatability.In this paper,apressure monitoring and clamping device for measuring the nonlinearity of materials in RITEC RAM-5000 SNAP nonlinear high-energy ultrasonic testing system is designed.It can realize the real-time monitoring of the bonding force of materials,improve the speed of point-by-point measurement and reduce the interference of the coupling conditions on the measurement results.The results show that the device can greatly improve the sensitivity of ultrasound to micro-defects,and enhance the penetration rate of ultrasound and the accuracy of pore detection.
引文
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[3]罗明.碳纤维增强树脂基复合材料孔隙率超声无损检测[D].大连:大连理工大学,2007.
[4]陆铭慧,徐肖霞.非线性超声检测方法及应用[J].无损检测,2012,34(7):61-66.
[5]陆铭慧,王旭.非线性超声检测信号提取的电路设计及测试[J].失效分析与预防,2014,9(1):11-15.
[6]陆铭慧,李沛芮,王旭.复合材料孔隙含量超声多参量评价方法研究[J].玻璃钢/复合材料,2016(3):55-59.
[7]陆铭慧,刘磨,张雪松.RTM玻璃纤维复合材料孔隙含量对超声特征参数的影响[J].复合材料,2017,4(6):33-41.
[8]陆铭慧,林娜.RTM/纺织复合材料孔隙率非线性超声方法研究[J].航空制造技术,2013,2(5):89-93.
[9]李沛芮,陆铭慧.复合材料孔隙含量超声多参量评价方法及设备研究[D].南昌:南昌航空大学,2016.
[10]祝婧.基于非线性超声的RTM/纺织复合材料孔隙评价研究[D].南昌:南昌航空大学,2014.
[11]邓燕燕.碳纤维复合材料孔隙率的超声评价方法研究[D].南昌:南昌航空大学,2011.