便携式光离子化VOCs气体检测器设计  

Design of Portable Photoionization VOCs Gas Detector

作　　者：郑培超[1] 许冠捷 何雨桐 卢建树 王金梅[1] ZHENG Pei-chao;XU Guan-jie;HE Yu-tong;LU Jian-shu;WANG Jin-mei(College of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《仪表技术与传感器》2021年第12期45-50,共6页Instrument Technique and Sensor

基　　金：重庆市教委科学技术项目(KJQN202000640);重庆市自然科学基金项目(cstc2020jcyj⁃msxmX0147);国家自然科学基金项目(61805030)。

摘　　要：设计了快速检测挥发性有机物的便携式光离子化检测器。该检测器使用真空紫外灯作为电离光源,以STM32F103RCT6作为微控制器,完成了光电离室、紫外灯驱动电路、信号检测电路和USB充电电路等模块的设计。同时可显示温度和湿度参数,并具有WiFi传输功能。使用0~200 ppm(1 ppm=10^(-6))异丁烯气体对该检测器进行定标验证,实验证明该检测器具有良好的重复性,拟合度达到0.99762,稳定性为2.72%,检测限达到2.2 ppm,响应时间为8~10 s,能够满足VOCs的快速和便携式检测。A portable photoionization detector for rapid detection of volatile organic compounds was designed.The detector used vacuum ultraviolet lamp as the light source and employed STM32F103RCT6 chip as the microcontroller.The design of the i⁃onization chamber,UV lamp drive circuit,signal detection circuit and USB charging circuit was achieved.The detector can also display temperature and humidity parameters and has WiFi transmission function.The isobutylene gas in the range of 0 to 200 ppm(1 ppm=10^(-6))was used as test gas for calibration verification.The experiment results prove that the detector has good repeat⁃ability,and the fit coefficient is 0.99762,detect stability is 2.72%,the detection limit is 2.2 ppm,and response time is 8~10 s.The detector can satisfy the fast and portable detection of VOCs.

关 键 词：光离子化气体检测器 电离室 紫外灯驱动电路 挥发性有机物 电源 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]