|本期目录/Table of Contents|

[1]冯温婷,郑丽娜,泽福,等.气力输送条件下金属粉尘静电感应信号响应特性与误差机理研究*[J].中国安全生产科学技术,2026,22(5):92-99.[doi:10.11731/j.issn.1673-193x.2026.05.011]
　Feng Wenting,Zheng Lina,Ze Fu,et al.Research on signal response characteristics and error mechanism of electrostatic induction for metal dust under pneumatic conveying conditions[J].Journal of Safety Science and Technology,2026,22(5):92-99.[doi:10.11731/j.issn.1673-193x.2026.05.011]
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气力输送条件下金属粉尘静电感应信号响应特性与误差机理研究*

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
22
期数:
2026年5期
页码:
92-99
栏目:
安全工程技术
出版日期:
2026-05-30

文章信息/Info

Title:
Research on signal response characteristics and error mechanism of electrostatic induction for metal dust under pneumatic conveying conditions
文章编号:
1673-193X(2026)-05-0092-08
作者:
冯温婷; 郑丽娜; 泽福; 王成; 马文轩
（1.中国矿业大学 安全工程学院,江苏 徐州 221116；
2.北京理工大学 爆炸科学与安全防护全国重点实验室,北京 100081）
Author(s):
Feng Wenting;  Zheng Li’na;  Ze Fu;  Wang Cheng;  Ma Wenxuan
(1.School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;
2.State Key Laboratory of Explosion Science and Safety Protection,Beijing Institute of Technology,Beijing 100081,China)
关键词:
金属粉尘; 静电感应; 响应特性; 误差机理; 气固两相流
Keywords:
metal dust;  electrostatic induction;  response characteristics;  error mechanism;  gas-solid two-phase flow
分类号:
X964；X830.2
DOI:
10.11731/j.issn.1673-193x.2026.05.011
文献标志码:
A
摘要:
为揭示金属粉尘在气力输送环境下的荷电特征与监测规律，解决其高质量浓度非稳态流场的实时测量难题，基于静电感应理论与多相流动力学，设计了1种金属粉尘质量浓度反演模型，并深入探究了其信号响应特性与误差产生机理。利用搭建的实验风硐系统，以典型抛丸铝粉为对象，系统分析了传感器敏感场域几何参数及流场特征对感应信号的影响。研究结果表明：感应电流强度受控于电极有效感应场域的空间积分效应，与电极长度及直径呈显著线性正相关；传感器输出信号与粉尘质量浓度在5～100 mg/m3范围内具有高度线性一致性(R2=0.997)。误差机理分析发现，高风速(>7 m/s)会导致颗粒在感应区的驻留时间小于电路响应时间常数，从而引发信号幅值衰减；而微细颗粒因斯托克斯数较小，受湍流脉动影响显著，易导致信号信噪比降低。研究结果可为除尘系统的防爆预警提供理论参考。
Abstract:
In order to reveal the charging characteristics and monitoring law of metal dust in pneumatic conveying environments,and solve the problem of real-time measurement of high-concentration unsteady flow field,a mass concentration inversion model of metal dust was established based on electrostatic induction theory and multiphase flow dynamics,and the signal response characteristics and error generation mechanism were deeply investigated.Taking typical shot-blasting aluminum powder as the research object,the self-built experimental wind tunnel system was adopted to systematically analyze the influences of geometric parameters of the sensor sensitive field and flow field characteristics on the induced signal.Results demonstrate that the induced current is governed by the spatial integration effect of the electric field within the sensing volume.The concentration inversion model for the 5~100 mg/m3 range showed high precision with R2=0.997 and a RMSE of 1.60 mg/m3.Analysis revealed that at high wind speeds (＞7 m/s),particle residence time approaches the circuit response constant,leading to signal attenuation finer particles exhibit lower stokes numbers,resulting in strong flow followability and increased signal fluctuations due to turbulent eddies.The research conclusions can provide a theoretical reference for explosion protection and early warning of dust removal systems.

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备注/Memo

备注/Memo:
收稿日期： 2026-01-06；修回日期：2026-04-07
* 基金项目： 国家重点研发计划项目(2023YFC3010602)
作者简介： 冯温婷，硕士研究生，主要研究方向为粉尘监测技术。
通信作者： 郑丽娜，博士，教授，主要研究方向为粉尘监测技术。
更新日期/Last Update: 2026-06-03