【作者】 马天； 黄建国； 陈建峰；

【Author】 MA Tian,HUANG Jian-guo,CHEN Jian-feng (College of Marine Engineering,Northwestern Polytechnical University,Xi’an 710072,China)

【机构】 西北工业大学航海学院；

【摘要】 为满足无线传感器网络监测系统的需求,根据节点处和定位出目标声源点处的位置及声压,实现了声压分布的二维可视化绘制。首先提出了凸包扩张、平滑算法,由传感器的随机位置得到绘制区域边界点;然后在区域内按照坐标均匀选择插值点,通过双三次插值算法对声压进行插值;最后对插值出的所有声压点进行Delaunay三角剖分,并且把各点声压映射到"Matlab"的Colormap颜色表,使用OpenGL的三角形图元拼接绘制出整个声压面。实际应用表明,该方法可满足监测系统实时、交互的要求。更多还原

【Abstract】 To meet the demand of wireless sensor network monitoring system,visualization of acoustic pressure-distribution was realized,according to the position and pressure of the nodes and the located acoustic-target.First,the extending and smoothing algorithms of convex hull was presented,by which the boundary points of the drawing-area could be obtained according to the nodes’ position.Second,in accordance with coordinate,equably interpolation-points were chose inside the area,and their pressure was calculated by bi-cubic interpolation.Last,we made a Delaunay triangulation on these points,which pressure was mapped to the Colormap of ’Matlab’.After that,the entire pressure plane could be drawn though the triangle graphic-element of OpenGL.The application results showed that this system has better performance in real-time interaction in this monitoring system.更多还原