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计量学报  2023, Vol. 44 Issue (2): 226-230    DOI: 10.3969/j.issn.1000-1158.2023.02.10
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基于两段法及改变落球高度的硝化棉落球粘度测量
罗雨莹,郭泽荣
北京理工大学爆炸科学与技术国家重点实验室,北京100081
Measurement of Falling Ball Viscosity of Nitrocellulose Base on Two-segment Method and Changing Falling Ball Height
LUO Yu-ying,GUO Ze-rong
Measurement of Falling Ball Viscosity of Nitrocellulose Base on Two-segment Method and Changing Falling Ball Height
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摘要 为提高落球法测量硝化棉粘度的精确性,减小因小球在落球距离内做非匀速运动造成的误差,提出了一种基于两段法及改变落球高度的精确测量方法。采用PLC、光电传感器设计实验装置,选取5种粘度的试液,获得不同落球高度的计时值,拟合数据得到适宜落球高度。对比了传统固定高度与适宜落球高度方法的测量误差。实验表明,适宜落球高度和试液粘度之间存在负相关性;粘度大于60300mPa·s时,落球管口处即为适宜落球高度;粘度小于60300mPa·s时,在适宜落球高度释放小球能减小测量误差;粘度越低误差减小效果越明显。
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罗雨莹
郭泽荣
关键词 计量学粘度测量硝化棉粘度落球法适宜落球高度两段法可编程控制器    
Abstract:To improve the accuracy of measuring the viscosity of nitrocellulose by falling ball method and reduce the error caused by the non-uniform movement of small ball within the falling ball distance, an accurate measurement method based on two-segment method and changing falling ball height was proposed. PLC and photoelectric sensors were used to design the experimental device. Test solutions with different viscosities were selected to obtain the timing values of different ball drop heights. The suitable drop heights were obtained by fitting the data. The measurement error of traditional and suitable drop height was compared. Experimental results show that there is a negative correlation between the suitable drop height and the viscosity of the test solution; when the viscosity is greater than 60300mPa·s, the suitable drop height is at the drop pipe orifice; when the viscosity is less than 60300mPa·s, releasing the small ball at the appropriate falling height can reduce the measurement error; the lower the viscosity, the more obvious the effect of error reduction.
Key wordsmetrology    viscosity measurement    nitrocellulose viscosity    falling ball method    suitable falling ball height    two-segment method    PLC
收稿日期: 2021-11-03      发布日期: 2023-02-21
PACS:  TB933  
基金资助:西安近代化学研究所开放合作创新基金(SYJJ45)
作者简介: 罗雨莹(1997-),湖南长沙人,北京理工大学在读硕士研究生,研究方向为硝化棉落球粘度精确测量及自动化。Email:493310030@qq.com
引用本文:   
罗雨莹,郭泽荣. 基于两段法及改变落球高度的硝化棉落球粘度测量[J]. 计量学报, 2023, 44(2): 226-230.
LUO Yu-ying,GUO Ze-rong. Measurement of Falling Ball Viscosity of Nitrocellulose Base on Two-segment Method and Changing Falling Ball Height. Acta Metrologica Sinica, 2023, 44(2): 226-230.
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