凝聚核粒子计数器原理与实验研究  

Principle and experimental study of the condensed particle counter

作　　者：张白[1] 蒋尊阳 曹威 孔德超 Zhang Bai;Jiang Zunyang;Cao Wei;Kong Dechao(North Minzu University,Yinchuan 750021,China)

机构地区：[1]北方民族大学,银川750021

出　　处：《国外电子测量技术》2024年第6期94-101,共8页Foreign Electronic Measurement Technology

基　　金：国家自然科学基金(52065002);宁夏自然科学基金(2022AAC02045)项目资助。

摘　　要：针对环境中纳米量级颗粒物浓度检测问题,对凝聚核粒子计数器进行了研究与设计。首先对凝聚核粒子生长原理及检测原理进行了研究,并依据异质核化原理设计了凝聚核粒子计数器的生长装置;其次设计了传感器后级信号处理电路用于解决微弱粒子检测信号抗干扰能力差和测量困难问题;然后设计了基于抗饱和积分PID的控制系统,实现了采样流量的闭环控;最后制研制了凝聚核粒子计数器样机,并开展了流量控制、纳米量级粒子生长及计数实验。实验结果表明,设计的凝聚核粒子计数器,流量稳定性在2%以内,以TSI3772型凝聚核粒子计数器为标准仪器的计数相对误差在±8.5%以内,满足了行业规范要求。Aiming at the problem of nano-scale particle concentration detection in the environment,the condensed particle counter was researched and designed.Firstly,the growth principle and detection principle of condensed particles were researched,and the growth device of condensed particle counter was designed according to the heteronuclear principle.Secondly,the signal processing circuit of the sensor was designed to solve the problem of poor anti-interference ability and difficult measurement of weak signal of particle detection.Then,a control system based on anti-saturation integral PID was designed to realize the closed-loop control of sampling flow.Finally,a prototype of condensed particle counter was developed,and several experiments were carried out,including flow control,nano-scale particle growth and counting.The experimental results show that the flow stability of the condensation particle counter designed is within 2%,and the relative error of counting with the TSI3772 condensation particle counter as the standard instrument is within±8.5%,which meets the requirements of the industry standard.

关 键 词：凝聚核粒子计数器 异质核化 生长装置 信号处理 

分 类 号：TH724[机械工程—仪器科学与技术]