[1] Zhang Pu**, Kong Li, Huang Xinhan,. Characteristics of a Flow Transducer Based on Polarized Charge* [J]. Journal of Southeast University (English Edition), 2001, 17 (2): 36-40. [doi:10.3969/j.issn.1003-7985.2001.02.009]
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Characteristics of a Flow Transducer Based on Polarized Charge*(
)
基于极化电荷的流量传感器特性
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 17
- Issue:
- 2001 2
- Page:
- 36-40
- Research Field:
- Electrical Engineering
- Publishing date:
- 2001-12-30
Info
- Title:
- Characteristics of a Flow Transducer Based on Polarized Charge*
- 基于极化电荷的流量传感器特性
- Author(s):
- Zhang Pu**, Kong Li, Huang Xinhan
- Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
- PACS:
- TM930.12
- DOI:
- 10.3969/j.issn.1003-7985.2001.02.009
- Abstract:
- In this paper we analyze the characteristics of a flow transducer based on polarized charge. The effects of the charged particles in pneumatic pipeline on the measurement pipe potential are discussed in detail and the equivalent circuits of the potential measurement are presented. On this bases, the relationships between mass flowrate and the electrical potential are obtained for different time constants of the measurement circuit. A satisfactory model is presented based on the characteristics of gas-solid two-phase flow. The linearity of the model is verified by the experiment results. The transducer, which is coaxially connected with the transport pipeline, does not disturb the flow state and has the features of ruggedness and durability, it is especially suitable for industry process control.
- 对基于极化电荷的流量传感器特性进行了比较系统深入的分析, 详细讨论了荷电颗粒对测量管电势的影响, 给出了等效测量电路, 针对测量回路时间常数的不同情况, 得到了质量流量与输出电势之间不同的关系式, 并根据气固两相流的特性得出了令人满意的测量模型.实验结果验证了模型的线性特性.基于极化电荷的流量传感器不仅结构简单、寿命长, 而且与气输管道同轴密封连接, 不影响粉粒体在管道中的流动状态, 因此特别适合于工业过程控制.
References:
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[2.] R.S. Medlock, and R.A. Furness, Mass flow measurement — a state of the art review, Measurement+Control, vol.23, no.5, pp.100-113, 1990
[3] C.Zhu, and S.L.Soo, A modified theory for electrostatic probe measurements of particles mass flows in dense gas-solid suspensions, J Appl Phys, vol.72, no.5, pp.2060-2062, 1992
[4] R.G.Green, M.F.Rahamat, and K. Dutton, et al., Velocity and mass flow rate profiles of dry powders in a gravity drop conveyor using an electrodynamic tomography system, Meas Sci Technol, no.8, pp.427-436, 1997
[5] J.Cross, Electrostatics: principles, problems and applications, Adam Hilger, Bristol, pp.41-46, 1987
[6.] Z.G.Bao, Principles of electrostatic technique(In Chinese), Publishing company of Beijing University of Science and Technology, Beijing, pp.30-67, 1993
Memo
- Memo:
- * The project supported by the National Natural Science Foundation of China(69874017).
** Born in 1966, female, doctor, associate professor.