摘要
为准确获取到地震坍塌信息,提高救援抗灾能力,提出了基于LoRa无线技术的地震应急救援坍塌信息获取方法。首先分析LoRa无线技术传输系统工作流程,考虑受灾环境多径效应,在LoRa无线系统中使用三边定位锚点,估算坍塌位置节点,得到与实际位置的距离间隔;其次选用三轴高分辨率加速度传感器作为信息获取模块,以无线振动的形式完成信息采集,建立信息获取性能评估函数,提高获取性能,并对获取到的信息幅值采用相位差值算法较正,对得到的坍塌信号频率及相位完成修正,确保可准确的得到受灾区域相关信息数值;最后通过与支持向量机对比获取到的信息数量与准确率、地震区域坍塌类型、及加入其它地形作为干扰因素进行仿真,仿真结果显示,所提方法具有更高的准确率与稳定性。
In order to collect the collapse information accurately and improve the ability of rescue and disaster resistance,this article puts forward a method to collect the collapse information of earthquake emergency rescue based on Lora wireless technology.First of all,the working process of LoRa wireless technology transmission system was analyzed.Considering the multipath effect of disaster environment,trilateration anchor was used in LoRa wireless system to estimate the collapse position node and calculate the distance from the actual position.Secondly,triaxial high-resolution acceleration sensor was selected as the information acquisition module to complete the information acquisition in the form of wireless vibration.Moreover,the information acquisition performance evaluation function was established to improve the acquisition ability.In addition,the phase difference algorithm was used to correct the amplitude of information,the frequency and the phase of collapse signal,so that the relevant information values of disaster region were accurately obtained.Compared with the support vector machine,the number and accuracy of information,the type of collapse and other terrain were used as the interference factors for simulation.Simulation results show that the proposed method has higher accuracy and stability.
作者
刘颖
鹿玉红
刘敏
孙晓叶
LIU Ying;LU Yu-hong;LIU Min;SUN Xiao-ye(School of Information Engineering Institute of Disaster Prevention,Yanjiao Hebei 065201,China;School of Computer Science China West Normal University,Nanchong Sichuan637009,China)
出处
《计算机仿真》
北大核心
2020年第3期224-228,共5页
Computer Simulation
基金
河北省科技计划自筹经费项目(17210334)
防灾科技学院《c语言程序设计》64学时精品课程建设项目(JPJS2018009)。
关键词
救援抗灾
三边定位锚点
加速度传感器
信号频率
Rescue and disaster resistance
Lo Ra wireless technology
Trilateration anchor
Acceleration sensor
Signal frequency
