摘要本论文主要设计了一种自动水表检定系统，采用计算机和单片机相结合控制标准容器水位的方式，来实现对水表检测的自动化检定。它减轻了检定人员的劳动强度，提高了检定效率和精度，并且操作简便，很适合目前水表检定单位使用。78065

本文采用上、下位机的形式设计了水表检定控制系统。下位机基于单片机设计了硬件系统，给出了硬件原理图和软件流程图及其相关的程序。主要采用AT89C52单片机、电触点传感器、TC1047温度传感器等硬件来实现，具有液位温度检测功能。时刻显示液位温度，按下液位按键时可检测并显示相关值，同时可根据相关情况手动设定液位的上下限，当不在限定范围时报警。基本实现自动控制，同时有些可以手工控制更改，此设计简化了设备同时还减低了成本，增加了操作的安全性。上位机使用labview设计了数据采集和控制软件，给出了软件设计框图、串口通讯等设计步骤，具有友善的人机界面，操作方便，简单易懂。

毕业论文关键词:全自动水表检定；液位控制系统；单片机；LABVIEW

Abstract This paper mainly designs an automatic water meter calibration system, using computer and single chip microcomputer to control the water level of the standard container, to realize the automatic test of the water meter detection。It reduces the labor intensity of the test personnel, improve the efficiency and accuracy of the test, and the operation is simple and convenient, and it is suitable for the use of the current unit。

The liquid level control system is designed in the form of upper and lower computer。 The hardware system is designed based on single chip microcomputer, and the hardware principle diagram and software flow chart are given。 The main use of AT89C52 microcontroller, electric contact sensors,TC1047 temperature sensor and other hardware to achieve, with the level measurement function。 When the liquid level is displayed, the relevant value can be detected and displayed when the liquid level keys are pressed, and the upper and lower limits of the liquid level can be manually set according to the relevant conditions。 Basic automatic control, while some can be manually controlled to change, this design simplifies the equipment while also reducing the cost, increase the safety of the operation。 PC uses LabVIEW to design the data acquisition and control software, gives the software design block diagram, serial communication and other design steps, with a friendly man-machine interface。Also it is easy to operate and easy to understand。

Key Words：Automatic water meter calibration；Liquid level control system；single-chip microcomputer；LABVIEW

目录

第一章 绪论 1

1。1 课题背景 1

1。2 国内外研究的现状 2

1。3 本文结构 5

第二章 水表检定控制系统概述 6

2。1 水表检定装置工作原理 6

2。2 控制系统方案设计 8

2。2。1 系统的功能 8

2。2。2 系统结构 8

第三章 控制系统下位机设计 10

3。1 核心芯片AT89C52单片机 10

3。2 液位检测模块 11

3。3 温度检测模块 11

3。3。1 温度传感器TC1047参数 11

3。3。2 温度采集实现过程