1) multiple echo method
多次反射法
1.
Based on analysis of the microstructures and micro-defects of W-Cu alloy prepared by sintering and infiltration process, a multiple echo method have been carried out to do ultrasonic examination for W-Cu alloy.
在分析了CuW材料的组织及缺陷特点后,认为多次反射法比较适合,据此对探头频率、对比试块的结构、探伤灵敏度等参数和评价方法进行了研究。
2) multiple pulse-echo method
多次脉冲反射法
3) multiple reflections
多次反射
1.
The effects of such factors as the multiple reflections,the vertex angles and the diameters of the keyhole on the intensity distribution of .
在假设小孔为圆锥形的基础上,按照几何光学理论,通过跟踪光线在小孔内的多次反射轨迹,对激光深熔焊接小孔内等离子体的反韧致辐射吸收进行了详细研究。
2.
On the assumption of conical keyhole and using geometrical optics theory, a detailed study on Fresnel absorption and multiple reflections on the keyhole wall in deep penetration laser welding of metals was made by tracing a beam light.
在假设小孔为圆锥形的基础上,按照几何光学理论,通过跟踪光线在小孔内的多次反射轨迹,研究了激光在圆锥形小孔孔壁上的多次反射吸收。
3.
The results indicate that multiple reflections are favorable to the increase of depth.
结果表明,由于前沿存在多次反射,使得切割深度增加。
4) Multiple reflection
多次反射
1.
Through multiple reflections of a laser beam between a CD and a parallel mirror, a laser beam displacement caused by the CD vibration can be enlarged, so that the measurement of the amplitude is simplified.
该方法通过激光束在光盘与平面镜之间的多次反射 ,将光盘振动引起的光偏移量放大 ,从而简化了光盘振幅的测量。
补充资料：多次反射
多次反射
超声学术语。又称“多重反射”“多重回声”。超声脉冲在反射界面与换能器表面之间往返多次反射的现象。在声像图和回声图上可显示为2、3…多次距离相等、逐渐减弱的图像或回波波高。换能器与反射界面愈靠近，反射的重复次数愈多；界面声阻抗失配愈大，则反射信号愈强。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条