时差法超声波流量计中时间间隔测量及误差分析
PDF下载 (751)杨 亚,王让定,姚 灵,左富强.时差法超声波流量计中时间间隔测量及误差分析[J].宁波大学学报(理工版),2012,25(04):35-39.DOI:
YANG Ya,WANG Rang-ding,YAO Ling,ZUO Fu-qiang.Measurement on Time-interval in Transit-time Ultrasonic Flowmeter and Error Analysis[J].Journal of Ningbo University(Natural Science & Engineering Edition),2012,25(04):35-39.DOI:
| Title: | Measurement on Time-interval in Transit-time Ultrasonic Flowmeter and Error Analysis |
| 作者: | 杨 亚, 王让定, 姚 灵, 左富强 |
| Author(s): | YANG Ya, WANG Rang-ding, YAO Ling, ZUO Fu-qiang |
| 关键词: | 超声波流量计; 时间间隔测量; 误差分析 |
| Keywords: | ultrasonic flowmeter; time interval measurement; error analysis |
| 分类号: | TH814 |
| 文献标识码: | A |
| 摘要: | 在时差法超声波流量计计量原理的基础上, 分析了影响时差法超声波计量准确度的主要原因, 通过采用基于延迟线内插法的专用测时芯片TDC-GP21实现高分辨率时间间隔的测量, 并对影响时间间隔测量准确度的因素进行了充分分析, 提出了相应的解决方法. 最后, 设计了时间间隔测量系统, 利用该系统进行的实验结果表明, 系统达到了ps级的时间间隔测量标准差, 流量计的测量误差可保证在%以内. |
| Abstract: | On the basis of the time ultrasonic flowmeter mechanism, the main factor of affecting the transit-time ultrasonic measurement accuracy is addressed, that is, the time-interval measurement error. A special delay line-based time-interval measuring chip TDC-GP21 was used to develop a high-resolution time-interval measurement, so that the factors of influencing time-interval measurement accuracy can be fully analyzed with the corresponding countermeasure method developed. In the end, the time-interval measurement system is designed with measurement errors guaranteed to be within ±0.5%. |
| 参考文献 /References: | [1] 张学庆. 流量测量的意义及流量传感器的现状[J]. 石油化工自动化, 2005(5):99-101. [2] 彦芳, 王小平, 宋万民, 等. 时差法超声波流量汁的高精度测量技术[J]. 微计算机信息, 2006, 22(6):198- 199. [3] 刘强, 王让定, 姚灵, 等. 时差法超声流量计低功耗设计方法的研究[J]. 宁波大学学报: 理工版, 2012, 25(2): 37-41. [4] 孙杰, 潘继飞. 高精度时间间隔测量方法综述[J]. 计算机测量与控制, 2007, 15(2):145-148. [5] 张廷, 黄佩诚. 高精度时间间隔测量技术与方法[J]. 天文学进展, 2006, 23(1):12-14. [6] Jansson J, M?ntyniemi A, Kostamovaara J. A CMOS time-to-digital converter with better than 10ps single-shot precision[J]. IEEE Journal of Solid-State Circuits, 2006, 41(6):1286-1296. [7] Yu Jianjun, Fosterdai F, Jaeger R C. A 12-Bit vernier ring time-to-digital converter in 0.13μm CMOS technology[J]. IEEE Journal of Solid-State Circuits, 2010, 45(4):830- 842. [8] Jansson J, M?ntyniemi A, Kostamovaara J. A delay line based CMOS time digitizer IC with 13ps single-shot precision[J]. IEEE International Symposium on Circuits and Systems, ISCAS, 2005(5):4269-4272. [9] Shimizu K, Kaneta M. A time-to-digital converter with small circuitry[C]. IEEE ASP-DAC 2009:1-10. [10] ACAM Corporation. TDC-GP21 datasheet[Z]. Germany: ACAM Corporation, 2010. [11] Kalisz J. Review of methods for time interval measure- ments with picosecond resolution[J]. Institute of Physics Publishing: Metrologia, 2004, 41:17-32. |
| 备注/Memo: | 收稿日期: 2012-05-31. 基金项目: 浙江省优先主题重点工业项目（2010C11025）; 浙江省教育厅重大科技攻关项目（ZD2009012）; 宁波市重大科技攻关项目（2009B10003）; 浙江省新苗人才计划（2011R405056）. 第一作者: 杨 亚（1986－）, 女, 贵州遵义人, 在读硕士研究生, 主要研究方向: 嵌入式系统. E-mail: picture.cool@163.com *通讯作者: 王让定（1962－）, 男, 甘肃天水人, 博导/教授, 主要研究方向: 嵌入式系统的开发与应用. E-mail: wangrangding@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
