基于NDIR的CO_2探测系统设计

Designing of carbon dioxide gas detection system based on NDIR

介绍一种基于非分光红外(NDIR)技术的CO_2探测系统,该系统包括硬件和软件两大部分.硬件部分包括正线性稳压电路、负线性稳压电路、DC/DC转换电路、电荷放大电路、放大倍数可调和阻抗匹配电路、程序下载电路和显示模块,该系统以内部集成12位ADC的微处理器MSP430F149为核心,配合外围电路控制红外光源闪烁和接收处理PMNT红外热释电探测器输出的模拟电压信号;软件部分进行信号采集、A/D转换、处理、显示.该系统采用PMNT红外热释电探测器,结合NDIR技术,设计一种CO_2在线检测系统.

Introduces a CO2 detection system based on Non-Dispersive Infra-Red(NDIR)technology.The system includes two parts hardware and software,hardware part contains linear regulator circuit of positive and negative linear regulator circuit,DC/DC conversion circuit,charge amplifier circuit of detector,magnification can be adjusted impedance matching circuit,program download circuit and display module,The system takes the integrated 12 bit ADC microcontroller as the core,cooperating with peripheral circuit to control infrared light source and to receive analog voltage signals from the PMNT infrared pyroelectric detector.The software section is used for signal collection,A/D conversion and processing and display.The system adopted PMNT infrared pyroelectric detector,combined with NDIR technology,and designed a system of CO2 on-line detection.