基于DTMF的河流流速测量系统研究与设计

摘要

针对当前河流流速无线测量系统的测流信号传输过程中衰减过大的问题,提出了一种基于DTMF技术的河流流速测量系统的软硬件设计方案;该系统由水上处理模块与水下采集模块构成,其中水下采集模块主要负责流速信号的采集及放大,水上处理模块负责将水下采集模块发送过来的数据进行计算并在液晶屏幕上予以显示,两者之间的通信采用DTMF技术予以实现；现场测试表明,由于采用了DT-MF技术用于通信,信号在传输过程中基本不存在衰减问题,并且信号抗干扰性较强,因此该系统达到了精确测量河流流速的目的.%Aiming to solve the signal attenuation problems which exist in the course of flow velocity data transmission in a wireless system to measure flow velocity, the authors adopt the system to measure flow velocity of river and its hardware and software implementation based on DTMF are presented. The system is made of overwater processor and underwater collection blocks, underwater collection module is mainly responsible for collecting data of flow velocity and amplifies; overwater processor calculates the data sent by the underwater module and displayed on the LCD screen. We implemented communication between the two through DTMF technology. Field use and test shows that, there must be an absence of signal attenuation during the transmission by using DTMF technology for communication, and the signal excelling in resisting interferences, so the system has achieved the purpose of accurate measurement of river flow.