摘要
基于射频信号强度及超声波测距原理,提出了一种射频与超声结合的室内网格定位方法与系统。定位区域划分为N个块,每个块由M个方格组成。每个块的中心以及每个方格的4个角上均安装1个带有无线通信功能和可测出信号强度的超声波测距模块构成的定位基点。移动目标首先向每个块的中心定位基点读取信号强度值,根据信号强度值确定出移动目标在哪个块内,然后对这个块的各定位基点发送同步信号和超声波,得该块各定位基点的超声波测距值,这些距离值经移动平均滤波法滤波后,计算出移动目标在定位区域内的精确坐标。移动目标将计算出的坐标数据通过无线通信上传到上位机显示、处理及保存。实验结果表明,显著降低了能耗,且定位偏差不大于5 cm。
Based on the principles of RF signal strength and ultrasonic ranging,an indoor grid location method and system combining RF and ultrasound was proposed.The positioning area was divided into N block,each block consisted of M squares.Each block center and the four corners of each square were installed with a wireless communication function and can measure the signal strength of the ultrasonic ranging module consisting of positioning base point.The moving target first read the signal intensity value from the central positioning base point of each block,determined which block the moving target was based on the signal intensity value,and then sent the synchronization signal and the ultrasonic wave to each positioning base point of the block to obtain the positioning base point of the ultrasonic ranging value,the distance value of the moving average filtering method to calculate the moving target in the positioning area of the precise coordinates.Move the target will be calculated by the coordinates of the data uploaded to the host computer through wireless communication,processing and preservation.Experimental results show that greatly reduce energy consumption,and the positioning deviation is not more than 5 cm.
作者
徐盛良
鲁照权
周永燕
王肖玥峰
XU Sheng-liang;LU Zhao-quan;ZHOU Yong-yan;WANGXIAO Yue-feng(College of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2019年第1期91-96,共6页
Instrument Technique and Sensor
基金
合肥工业大学产学研校企合作基金资助项目(W2016JSKF0467
W2016JSKF0468)
国家级大学生创新项目(2011710359008)
关键词
室内定位
超声波测距
信号强度
无线通信
上位机
indoor positioning
ultrasonic ranging
signal strength
wireless communication
host computer
