【作者】 李领录；

【导师】 王建平；

【作者基本信息】 合肥工业大学 ， 控制工程， 2007， 硕士

【摘要】 流量标准装置就是用来复现流量量值，最终溯源到国家的基本量基准的试验装置。其主要用途是对流量计进行校准，这是流量计量的基础，可以保证流量量值的统一与正确传递。标准装置的另一用途是进行流量计的性能试验研究工作。本文针对流量标准装置，设计了一种基于工业控制计算机的流量自动检定系统，以取代国内目前人工法流量标准装置，使得流量测试工作实现了自动化，实时化和智能化，从而在计量的准确性、快速性、可靠性和抗干扰能力等方面得到了明显的提高。文章给出了以工控机为核心的自动检定系统的设计思想和基本工作原理，设计了硬件系统，编制了软件系统。1、分析了自动检定系统工作原理和功能要求，设计了自动检定系统，以及喷嘴计量段。2、根据工作过程，设计了系统软件，包括主程序，各种中断服务程序，检定程序，数据处理程序，通信与控制程序等。3、经过设计、实验、改进，本系统以工控机为核心，采用基于专家知识的控制算法，使整个检定系统成为一个高精度、智能化的有机整体，在软件控制下按预定的程序自动进行信号的采集与存储。通过数据处理软件对采集到的标准、被检信号进行比较和运算，得出检定结论。设计的流量检定的计算机测控系统性能稳定，精度高，操作简单，界面直观，性能价格比高，通过半年多的运行，各项技术指标均能满足各类计量检测的要求。：更多还原

【Abstract】 The flow standard device is a test equipment which is intended to reproduce the value of a flow quantity, and finally to be traceable to the national primary standard for a base quantity. It is mainly used to calibrate flow meter. This calibration is the base of flow measurement. It will ensure unification and right transmission of the flow quantity. Another application of the flow standard device is to carry out performance testing and research of flow meters.In this paper, an automatically flow verification system based on industrial control computer is developed to replace the manual flow standard device used currently in the nation. This work realizes flow testing intellectually, automatically, and real-timely. And hence it remarkably improves accuracy, speed, reliability, and anti-interference ability of flow measurement.This article describes the design and fundamental principles of the automatic verification system which uses industrial control computer as the core technology. Both the hardware system and software system are designed and implemented. The main research can be summaried as below:1. The principles and functionality requirements of the automatic verification system are analyzed. A practical automatic verification system is designed, and a new nozzle measurement section is also developed.2. According to the working procedures, the system software is also designed, which includes the main program, various interruption service programs, verification program, data processing program, and communication & control program, etc.3. Through design, experiment, and improvement, the whole automatic verification system, based on the control algorithm of expert knowledge and experiments, becomes a highly precision and integrated intelligent system. The system can automatically collect and save the signals under the software control according to the pre-programmed procedures. Then using the data processing program to compare and calculate the measured signals and the standard signals to get the verification results.This designed flow verification system is stable, accurate , easy operation, simple interface, high ratio of performance/cost. After half a year’s running, all the technical specifications of the system can meet the requirements of the various flow measurements.更多还原