作者：黎虹¹, 李光², 付晓云³, 丛培田³

作者单位：1. 沈阳工学院基础课部, 辽宁 抚顺 113122;
2. 沈阳计量测试院, 辽宁 沈阳 110179;
3. 沈阳理工大学机械工程学院, 辽宁 沈阳 110168

关键词：密闭式医用离心机;转速;测振;自动跟踪滤波器;最小条件;计量

摘要：

针对当前密闭式医用离心机转速的计量检测难题，首次提出基于测振原理的密闭式医用离心机转速计量检测系统。该系统由测振传感器、信号调理电路、数据采集器和上位机测速系统组成，测振传感器实时测量密闭式医用离心机的振动信号，信号调理电路将振动信号放大、跟踪、滤波，数据采集器对信号高速采集然后通过USB传输到上位机测速系统，并基于最小条件的识别理论进行拟合、分析和处理。通过实验表明：基于测振原理和最小条件系统识别法的转速检测系统达到各种密闭式医用离心机转速的计量校准要求，该系统具有检测准确度高、自动化程度高、稳定性好和检测方便等优点，有很好的推广前景。

Speed measurement test system of closed medical centrifuges

LI Hong¹, LI Guang², FU Xiaoyun³, CONG Peitian³

1. Basic Course Department, Shenyang Institute of Technology, Fushun 113122, China;
2. Shenyang Metrology and Testing Institute, Shenyang 110179, China;
3. School of Mechanical Engineering, Shenyang Ligong University, Shenyang 110168, China

Abstract: In view of current speed measurement difficulty of closed medical centrifuges, a speed measurement system based on the principle of vibration is proposed. The system consists of vibration sensors, signal conditioning circuit, data acquisition unit and PC speed measuring system. The vibration sensors measure the real-time vibration signals of the closed medical centrifuges, the signal conditioning circuit amplifies, tracks and filters the vibration signals, the data acquisition unit collects the signals at a high speed and transmits them to PC speed measuring system via USB, and finally the PC speed measuring system conducts fitting, analysis and processing based on the recognition theory of minimum conditions. Experimental results show that the speed measurement system based on the principle of vibration and the minimum conditions system identification method can meet the speed measurement requirements of various closed medical centrifuges, and the system has the advantages of high accuracy, high degree of automation, good stability and convenient measurement, with a good prospect of promotion.

Keywords: closed medical centrifuges;speed;vibration;automatic tracking filter;minimum conditions;metrology

2017, 43(11): 70-73,101  收稿日期: 2017-01-18;收到修改稿日期: 2017-03-05

基金项目: 国家质量监督检验检疫总局科技计划项目（2014QK105）

作者简介: 黎虹(1981-),女,辽宁沈阳市人,教授,硕士,主要从事控制理论与测控系统的研究。

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