排序方式: 共有65条查询结果,搜索用时 406 毫秒
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基于环形光切测量方法的小管径图像测量系统的设计 总被引:2,自引:0,他引:2
在石油工业和武器系统检测领域,管道和深孔的尺寸以及缺陷检测是加工和使用过程中不可或缺的一个重要组成部分。现有的管道测量方法通常测量参数单一、测量装置结构复杂,适用直径范围一般大于50mm。环形光切测量方法是一种最新提出的检测深孔及管道内壁尺寸的光学测量方法。此文介绍一种它结合图像内窥测量的工作方式,并以此为依据作出了适用于直径25~37mm管径的测量系统的设计。该系统主要包括测量装置的结构设计,硬件设计和软件设计,可以非常理想的实现测量功能。 相似文献
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A new reflection approach for field distribution measurement of ultrasonic transducers was investigated. Instead of a point-like reflection target (rigid sphere) or thin wires (line-like targets), a line response function of experimental knife-edge distribution combined with the inverse Abel transforms was used to estimate the lateral beam distributions of ultrasonic transducers. The measurement steps were as follows:① A knife-edge was scanned perpendicularly to acoustic beam axis of the transducer using an ultrasonic C-scan system to obtain its ultrasonic image line response function, ② the transverse beam distribution was solved by the inverse Abel transforms, and ③ experiments were performed to obtain the lateral beam profiles of two transducers, with and without focus, and the results were compared with those from a hydrophone. The results showed that this method was effective for ultrasonic field measurement and could be as a substitute for hydrophone in most cases. 相似文献
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基于环形结构光的药室容积测量技术 总被引:1,自引:0,他引:1
药室容积是影响内外弹道性能的重要参数之一.传统的测量方法具有效率较低、精度不高等缺点.针对该容积测量问题,设计了一种新的测量系统,该系统主要由一个环形激光投射器和CCD相机组成.投射器用于激发同药室内表面相交的圆锥形光曲面,而相机用于获取该光曲面同药室内表面相交形成的截面轮廓图像.当沿着药室轴线方向连续地、以足够高的采样密度获取多个类似的轮廓之后,可以得到药室完整的三维离散数据.由于同弹体的摩擦及火药的燃烧,药室的终点不断变化,针对该问题,提出了一种新的虚拟量规的方法,通过计算理想模型同实测数据的相似性确定药室的终点.通过对实际火炮的实验验证了该方法的可行性和精度. 相似文献
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