Infrared and Laser Engineering, Volume. 54, Issue 6, 20240577(2025)

Design of miniaturized NDIR gas sensor based on long path gas chamber

Yijie WANG1,2, Xinru ZHANG1,2, Lei ZHANG1,2, Lei FAN1,2, and Qiulin TAN1,2
Author Affiliations
  • 1Key Laboratory of Micro/Nano Devices and Systems, Ministry of Education, North University of China, Taiyuan 030051, China
  • 2State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China
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    Figures & Tables(11)
    Diagram of sensor structure
    (a) Diagram of gas chamber structure; (b) Irradiance analysis of the avtive channel; (c) Irradiance analysis of the reference channel
    Block diagram of sensor hardware
    Software design flowchart
    Experimental platform
    (a) Active channel output voltage changes with temperature results; (b) Reference channel output voltage changes with temperature results; (c) Active channel output voltage changes with concentration variation results; (d) Reference channel output voltage changes with concentration variation results
    (a) Output response S changes with concentration variation; (b) Response time testing; (c) Stability testing; (d) Repetitive testing
    Comparison of neural network prediction results
    Error analysis results
    • Table 1. Temperature compensation results using the fitting formula method

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      Table 1. Temperature compensation results using the fitting formula method

      ParameterValue
      True concentration0.5%1.0%1.5%2.0%2.5%3.0%
      Predicted concentration0.649%0.898%1.290%1.656%2.037%2.756%
      Absolute error0.149%−0.102%−0.210%−0.344%−0.463%−0.244%
      Relative error4.967%−3.400%−7.000%−11.467%−15.433%−8.133%
    • Table 2. Temperature compensation results using the GA-BP neural network

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      Table 2. Temperature compensation results using the GA-BP neural network

      ParameterValue
      True concentration0.5%1.0%1.5%2.0%2.5%3.0%
      Predicted concentration0.486%0.974%1.457%2.024%2.514%2.968%
      Absolute error−0.014%−0.026%−0.043%0.024%0.014%−0.032%
      Relative error−0.467%−0.867%−1.433%0.800%0.467%−1.067%
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    Yijie WANG, Xinru ZHANG, Lei ZHANG, Lei FAN, Qiulin TAN. Design of miniaturized NDIR gas sensor based on long path gas chamber[J]. Infrared and Laser Engineering, 2025, 54(6): 20240577

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    Paper Information

    Category: 光电材料与器件

    Received: Oct. 12, 2025

    Accepted: --

    Published Online: Jul. 1, 2025

    The Author Email:

    DOI:10.3788/IRLA20240577

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