| 微机-机械扫描阀测压系统精确度改善与提高 |
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| 引用本文： | 李建英,姜序诗,王宗栋.微机-机械扫描阀测压系统精确度改善与提高[J].实验流体力学,1992(4). |
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| 作者姓名： | 李建英 姜序诗 王宗栋 |
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| 作者单位： | 西北工业大学
(李建英，姜序诗)，西北工业大学(王宗栋) |
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| 摘 要： | 本文对采用计算机-机械扫描阀测压系统在压力测量过程中影响测量精确度的诸因素进行了分析,介绍了改善和提高其测量精确度的几种方法。结果表明:效果显著,方法正确。
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| 关 键 词： | 压力测量 精确度 机械扫描阀 自校准技术 压力分布 风洞实验 |
IMPROVEMENT OF MEASURING ACCURACY FOR A MICROCOMPUTER-MECHANICAL SCANIVALVE PRESSURE MEASURING SYSTEM |
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| Li Jianying,Jiang Xushi,Wang Zongdong.IMPROVEMENT OF MEASURING ACCURACY FOR A MICROCOMPUTER-MECHANICAL SCANIVALVE PRESSURE MEASURING SYSTEM[J].Experiments and Measur in Fluid Mechanics,1992(4). |
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| Authors: | Li Jianying Jiang Xushi Wang Zongdong |
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| Institution: | Li Jianying;Jiang Xushi;Wang Zongdong(Northwestern Polyte(?)al University) |
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| Abstract: | The accuracy of pressure measuring has been concerned re-cently by most specialists.There are many factorsaffecting the measuringaccuracy,such as the accuracy of transducers,the electromagnetic interferences,the zero shift,the air leak,and so on.This paper will ana-lyse the factors which affect the measuring accuracy and introduce somemethods to improve it for measuring pressure distribution on surface ofan automobile using microcomputer-mechanical scanivalve system in alow speed wind tunnel tests.Several measures have been taken in oursystem,such as transducer calibration,digital filtering,zero shiftautocorrection,A/D converter self calibration,and data processingtechniques.It has been proved by hundreds of experiments that themethods are correct,simple to realize,low costs,and effective toimprove accuracy of pressure measuring.It is valuable in practices. |
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| Keywords: | pressure measuring measuring accuracy pressure distribution automatic checking wind tunnel test mechanical scanning vaive |
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