基于Modbus协议的超声波水流量计的设计  

Design of ultrasonic water flowmeter based on Modbus protocol

作　　者：刘畅 刘建昌 李跃忠[1,2] 罗先喜 Liu Chang;Liu Jianchang;Li Yuezhong;Luo Xianxi(East China University of Technology,Nanchang Jiangxi,330013;Jiangxi New Energy Technology and Engineering Technology Research Center,Nanchang Jiangxi,330013)

机构地区：[1]东华理工大学机械与电子工程学院,江西南昌330013 [2]江西新能源工艺与工程技术研究中心,江西南昌330013

出　　处：《电子测试》2022年第3期14-17,共4页Electronic Test

基　　金：国家自然科学基金(61663001);江西省新能源工艺及设备工程技术研究中心开放基金(JXNE2018-08)。

摘　　要：为了更好地将超声波水流量计检测的数据进行远程传输,本设计根据超声波水流量计的测量原理和Modbus通信协议,实现了基于Modbus协议的超声波水流量计的设计。介绍了基于MSP430微处理器并搭载高精度计时芯片TDC-GP22构成的基本功能电路。同时介绍了信号处理电路设计与仿真以及RS485通讯模块接口电路。在软件设计上,分析了其主要的框架结构以及Modbus的通信协议。最后实验表明,该设计实现了对水流量的测量并验证了其数据远程传输的可靠性。In order to better remote transmission of ultrasonic water flowmeter detection data,this design according to the ultrasonic water flowmeter measurement principle and Modbus communication protocol,based on Modbus protocol to achieve the design of ultrasonic water flowmeter.The basic function circuit based on MSP430 microprocessor and equipped with TDC-GP22 timing chip is introduced.At the same time,the design and simulation of signal processing circuit and RS485 communication module interface circuit are introduced.In software design,analysis of its main frame structure and Modbus communication protocol.Finally,experiments show that the design realizes the measurement of water flow and verifies the reliability of remote data transmission.

关 键 词：超声波流量计 MODBUS协议 TDC-GP22 信号处理电路 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]