Design of an embedded photoacoustic spectroscopy sensing system for trace gas detection

ZHU Mingkuan; LI Xisheng; LÜ Zhen

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Design of an embedded photoacoustic spectroscopy sensing system for trace gas detection

Design & Manufacture | 更新时间：2026-05-18

- Design of an embedded photoacoustic spectroscopy sensing system for trace gas detection
- Vol. 45, Issue 5, Pages: 131-136(2026)
- 作者机构：
  
  1. 北京科技大学自动化学院,北京,100083
  2. 北京市工业波谱成像工程技术研究中心,北京,100083
  3. 北京科技大学高等工程师学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP273;TP212
- Published：2026
- 稿件说明：
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ZHU Mingkuan, LI Xisheng, LÜ Zhen. Design of an embedded photoacoustic spectroscopy sensing system for trace gas detection[J]. 2026, 45(5): 131-136.
DOI：

ZHU Mingkuan, LI Xisheng, LÜ Zhen. Design of an embedded photoacoustic spectroscopy sensing system for trace gas detection[J]. 2026, 45(5): 131-136. DOI：

摘要

针对光声光谱(PAS)痕量气体检测系统的小型化与低成本化的应用需求，设计了一种以STM32H743为核心的嵌入式光声光谱传感系统。将激光器温度控制与波长调制、光声信号高精度采集以及数字锁相放大器(DLIA)集成于单一微控制器，实现了从光源激励到信号处理的全链路数字化集成。以乙炔气体为检测样本，实验结果表明，系统响应线性度良好（

=0.9982），经Allan偏差分析，在595s最佳积分时间下的最小检测限为0.0186μL/L。该系统在实现高集成度与低成本的同时，保障了良好的检测性能，具有一定的应用前景。

Abstract

To address the application requirements for miniaturization and low cost in photoacoustic spectroscopy(PAS) trace gas detection systems

an embedded photoacoustic spectroscopy sensing system with STM32H743 as the core is designed.Laser temperature control

wavelength modulation

high-precision photoacoustic signal acquisition

and digital lock-in amplifier(DLIA) are integrated into a single microcontroller

achieving full-link digital integration from optical excitation to signal processing.Using acetylene gas as the detection sample

experimental results show that the system exhibits good response linearity (

=0.9982).Through Allan deviation analys

the minimum detection limit at the optimal integration time of 595s is 0.0186μL/L.This system ensures good detection performance while achieving high integration and low cost

demonstrating certain application prospects.

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