文章详细信息 关键词： 超声声速法;柴油机;气缸盖;蠕化率;检测技术 [gap=494]Keywords: ultrasonic velocity method; diesel engine; cylinder head; vermicular graphite rate; technology of check an..
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Ultrasonic wind velocity measurement with time-difference method and wind velocity measurement system based on ARM micro-controller were introduced.
介绍了超声波时差法风速测量的基本原理，以及基于ARM微控制器的风速测量系统的实现方法。
This method is the theory basis of overcoming the distance ambiguity and velocity ambiguity, improving the image quality and resolution and designing new generation medical ultrasonic imaging system.
这一思想的提出为克服速度模糊和距离模糊，提高图像质量和分辨力，设计新一代医用超声成像系统提供了理论依据。
In this paper, the principle and primary results of measure ultrasonic sound velocity and attenuation coefficient by ultrasonic syntonic method are introduced.
本文介绍利用超声共振法测量声速和声衰减系数的原理及自来水和乙醇的测量结果。
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