摘要
研究了一种河道单侧多LoRa基站的无线浮标计数测流速方法,LoRa模块能实现毫秒级计时,测量精度能够达到分米级,对河水流速能够实现实时稳定监控。在通过电信号强度计算浮标的位置坐标时,采用差分和多次测量求均值和方差的方法能够较大限度的提高计算精度。利用电波在自由空间的传波损耗与距离的关系,以及三点定位法,能够计算出浮标的位置,并最终可得到其运动轨迹。本文能实现无线、高效、高精度的河水流速测量,节省了人力物力并且对野外复杂环境和恶劣天气的适应性更强,从而使河水流速测量更高效便捷。
In this paper,a method using wireless buoy to count flow rate for multi-LoRa base station in the single-sided river channel is studied.The LoRa module can realize millisecond timing and the measurement accuracy can reach the decimeter level in this method,which can realize stable monitoring of the river water flow rate in real time.When calculating the position coordinates of the buoy by the electrical signal strength,the method of averaging and variance using differential and multiple measurements can improve the calculation accuracy.By using the relationship between the wave loss of the radio wave and distance in free space and the three-point positioning method,the position of the buoy can be calculated and the motion trajectory can be finally obtained.This paper can realize remote,high-efficiency and high-precision river flow velocity measurement,saving manpower and material resources and adapting to complex outdoor environments and bad weather,thus it’s more efficient and convenient to measure the flow velocity of river.
作者
段峻
宋世渊
赵太飞
DUAN Jun;SONG Shi-yuan;ZHAO Tai-fei(Shaanxi Institute of Industrial Technology,Xianyang 712000,China;Xi’an University of Technology,Xianyang 710048,China)
出处
《电子设计工程》
2019年第12期62-65,70,共5页
Electronic Design Engineering
关键词
物联网技术
三点定位法
LoRa基站
三次样条插样
internet of things technology
three-point positioning method
LoRa base station
cubic spline interpolation
