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高精度超声波钻孔成像技术
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高精度超声波钻孔成像技术
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工学
工程数字化勘测技术
释
high precision ultrasonic borehole imaging technology
高精度超声波钻孔成像技术
以孔内探头发出的超声波为信号源,向下发射脉冲超声波信号,信号经倾斜45°放置的凹面镜聚焦反射、改变方向。并垂直入射孔壁,信号经孔壁反射,被探头接收形成一个像点,如此经360°扫描后形成在某一个深度孔壁一周的图像成像技术。
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bounded below sequence
bounded below set
bounded bilinear form
bounded body
bounded chain
bounded characteristic
bounded closed set
bounded closure
bounded cohomology
bounded complete statistic
bounded complete sufficient statistic
bounded complex
bounded convergence
bounded convergence theorem
bounded convergence topology
bounded curvature
bounded degree
bounded depth first search
bounded derivative
bounded derived category
bounded distance decoding
bounded distortion
bounded domain
bounded downwards
bounded element
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