基于硬件PWM的恒温气体检测池系统设计

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中图分类号：TN216 文献标识码：A 文章编号：2096-4706（2025）16-0024-06

Design of Constant Temperature Gas Detection Cell System Based on HardwarePWM

CHEN Jian， LI Lei， ZENG Jiangyong （Shenzhen Zhonghe Headway Bio-Sciand Tech Co.，Ltd.，Shenzhen 518122， China）

Abstract： In Non-Dispersive Infrared gasanalysis equipment，performance parameters of components such as internal infraredlightsourcs，etetors，ndfltesesesiietoiotaltmperatreiccts temeasuremtabilityofthe instrument.Meanwhile，thetemperatureofthegastobemeasuredalsochanges withtheenvironmentafterenteringthegaschamber. Therefore，thispaper designsaconstanttemperature gas detectioncellbasedonhardware PWM，outlines theoveralldesignsceme， hardware designschemeandstructuraldesign scheme，and explains thedetailed designandcalculation procesesofeachmodule. Throughactualmeasurement，thetemperatureisecurveintheconstanttmperaturecellhasgoodcontiuitywithoutoversotor undershoot，witha temperature stability of ±0.1∘C .It features high precision，low costand easy development，and has a significant effect on improving the measurement stability of infrared spectroscopy gas analysis equipment.

Keywords：Non-Dispersive Infrared; hardware PWM; gas detection cell; low cost

0 引言

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