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基于可溯源的自动控制系统在水流量标准检定装置上的应用研究
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摘要
“统一度量衡”就是每个国家的核心事务。在目前全球经济一体化的大背景下,保证量值传递系统的准确、高效非常重要。标准检定装置是国家量值传递系统的主体装备。由于其溯源性的特殊要求,制约了新技术在该领域的应用,致使标准装置的准确度、稳定性和工作效率无法快速提升。随着工业自动化控制系统的不断发展,其准确度、灵敏度、稳定性都有了质的飞跃,工业控制系统恰好能够弥补标准检定装置的这个缺陷。只有多学科结合考虑才能解决这一问题。
     太钢水流量标准检定装置是太钢水流量量值传递的最高计量标准,同时也是山西省大流量的最高标准,担负着全省流量类计量设备的量值传递和溯源。大流量检定标准装置的设备主体功能是为被检表、标准表创造一个稳定的流场,使得测量设备处于较为理想的测量状态,充分保证量值传递的准确、可靠。现在国内、国外同类产品使用的"大流量标准检定装置"稳压系统主要采用前级入口旁路稳压方式或中旁路稳压方式,前级入口旁路稳压方式通过调节稳压容器入口旁路阀稳定容器内液面,水塔稳压系统建立高位水塔储存一定量的检定介质达到稳定供水的目的,实际使用中旁路稳压方式存在容器液面波动大、检定点稳定时间长、精度低、管线覆盖面窄、自动化程度低、检定效率差等问题。水塔稳压系统存在检定时间长、检定效率低、系统压力无法调节以及装置投资巨大,不易推广等问题。
     本文就以上及存在的其它问题对太钢校准实验室实现“水流量标准检定装置”与“工业自动化控制系统”的多学科结合应用进行了探索研究。
"Unified weights and measures" is the core business of each country. In the current global context of economic integration, to ensure value delivery system accurately and efficiently is very important. Standard test device is the main body of the national value transfer systems and equipment. Because of its special requirements traceability and restricts new technologies in the field of application, resulting in standard equipment accuracy, stability and efficiency can not be improved rapidly. With the industrial automation control system continues to develop, its accuracy, sensitivity, stability, have a qualitative leap in industrial control systems just to make up a standards unit for this drawback. Only a combination of multi-disciplinary consideration to resolve this issue.
     Standard water flow TISCO water flow test device is the highest value transfer measurement standards, but also the highest standards of high flow in Shanxi Province, to carry out the province's traffic class metering delivery and traceability of equipment value. Large flow standards at the equipment of the main function is to be seized tables, standard tables to create a stable flow field, makes measuring equipment in a relatively good measurement of the state, fully guaranteed money passing accurate and reliable. Now both domestic and foreign similar products used in the "big flow standard test device" regulator system is mainly used or pre-class entry-pass regulator, front entry-level bypass mode regulator by regulating the voltage regulator bypass valve stability of the container imported container liquid, water tank regulator system, the establishment of a high towers stored a certain amount of test medium to achieve a stable water supply purposes, the actual use of the bypass regulator exists in the container surface and volatile point of stability in a long time test, precision is low, pipeline coverage, narrow, a low degree of automation and quality control problems and poor efficiency. Towers stabilizing system a long time there is verification, certification and inefficient, the system pressure can not be adjusted and the installation of huge amount of investment is not easy to promote and so on. This lack of water for Shanxi province, the importance of accurate measurement is self-evident.
     In this paper, these and other problems exist in TISCO calibration laboratories to achieve "water flow standard verification device" and "industrial automation control systems" combined application of multi-disciplinary research carried out to explore。
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