“high precision ultrasonic borehole imaging technology”的概念、定义、翻译、参考文献-科学参考

单词	high precision ultrasonic borehole imaging technology
释义	high precision ultrasonic borehole imaging technology Encyclopedia 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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