CAJ | 학술논문

无线传感器网络中覆盖空洞大小的识别直接影响陷阱空洞的判断。现有陷阱空洞检测算法均基于理想圆盘覆盖模型，在起伏地形条件下不能准确识别空洞实际大小，导致算法失效。本文针对丘陵地形特点，提出一种基于数字高程地图坡度信息的地形修正方法，通过构建传感器节点方向梯度感知模型，实现起伏地形下的陷阱空洞检测。在此基础上，进一步研究了节点间距、坡度和坡向对陷阱空洞检测结果的影响规律，找到一种根据地形确定节点部署间距的近似计算方法。通过仿真实验，验证了本文方法的有效性，并得出了在保证陷阱空洞的发生概率低于5%时的节点间距取值。该结果为在起伏地形下部署传感器网络提供了参考。
무선전감기망락중복개공동대소적식별직접영향함정공동적판단。현유함정공동검측산법균기우이상원반복개모형，재기복지형조건하불능준학식별공동실제대소，도치산법실효。본문침대구릉지형특점，제출일충기우수자고정지도파도신식적지형수정방법，통과구건전감기절점방향제도감지모형，실현기복지형하적함정공동검측。재차기출상，진일보연구료절점간거、파도화파향대함정공동검측결과적영향규률，조도일충근거지형학정절점부서간거적근사계산방법。통과방진실험，험증료본문방법적유효성，병득출료재보증함정공동적발생개솔저우5%시적절점간거취치。해결과위재기복지형하부서전감기망락제공료삼고。
How to get the size of the holes in wireless sensor networks directly affects trap hole detection. Previous hole detection algorithms always base on the disk coverage model,and it can not get the actual size of the holes in rugged terrain. For the case of hilly terrain, this paper put forward a topographic correction algorithm based on the slope information in digital elevation maps to detect trap holes in rugged terrain by constructing directional sensing model for the sensor nodes. Based on this method,this paper further studies on the influence on trap holes detection of slope, aspect and node spacing,and finds a approximate method to determine the node spacing according to the terrain. The simulation result demonstrates the algorithm and help to find out the value of the node spacing to make the rate of trap holes below 5%. This result can provide reference for the deployment of sensor networks in rugged terrain.