| 小管径高精度超声波流量计设计 |
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| 引用本文： | 丁凤林,李宗良,魏延明,宗光华.小管径高精度超声波流量计设计[J].空间控制技术与应用,2011,37(1):28-32,49. |
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| 作者姓名： | 丁凤林 李宗良 魏延明 宗光华 |
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| 作者单位： | 1. 北京控制工程研究所,北京,100190
2. 北京航空航天大学机器人研究所,北京,100191 |
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| 摘 要： | 航天器推进剂在轨剩余量测量一直是航天器在轨管理所面临的一个难题.提出采用超声波流量计测量推进剂在轨剩余量的方法,并给出了超声波流量计的设计方案.设计的新型超声波流量计结构,通过改变超声换能器的安装方式,从而延长了超声波传播路径,减少了传播过程中超声波的衰减.通过以单片机和FPGA为主控制器、以高精度时间测量芯片作为数据采集模块的流量计软硬件系统实现了超声波流量计对液体流量的高精度测量.通过恒速测试、交变流速测试和总量测试表明,该系统测量精度达到了0.5%,可满足目前航天器推进系统推进剂剩余量的在轨测量要求.
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| 关 键 词： | 超声波流量计 流量测量 时间差法 |
Design of High-Accuracy Ultrasonic Flowmeter |
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| DING Fenglin,LI Zongliang,WEI Yanming,ZONG Guanghua.Design of High-Accuracy Ultrasonic Flowmeter[J].Aerospace Contrd and Application,2011,37(1):28-32,49. |
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| Authors: | DING Fenglin LI Zongliang WEI Yanming ZONG Guanghua |
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| Institution: | DING Fenglin1,LI Zongliang1,WEI Yanming1,ZONG Guanghua2(1.Beijing Institute of Control Engineering,Beijing 100190,China,2.Robotics Institute,Beihang University,Beijing 100191,China) |
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| Abstract: | In order to solve the problems of short propagation path and difficulties in measuring the transit-time when a traditional Z ultrasonic flowmeter is used for small caliber measurement,a new ultrasonic flowmeter is designed.Propagation path is extended and the attenuation of ultrasonic intensity is reduced by altering the transducer's installation.The high-precision flowmeter control system is designed by using FPGA as the main-controller and high accuracy timer as the time interval measurement controller.Th... |
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| Keywords: | ultrasonic flowmeter flow rate measure transit-time method |
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