On-Site and Sensitive Pipeline Oxygen Detection Equipment Based on TDLAS
The application of oxygen sensors based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) in the industrial field has received extensive attention. However, most of the existing studies construct detection systems using discrete devices, making it difficult to apply them in the industrial field...
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MDPI AG
2025-06-01
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| author | Yanfei Zhang Kaiping Yuan Zhaoan Yu Yunhan Zhang Xin Liu Tieliang Lv |
| author_facet | Yanfei Zhang Kaiping Yuan Zhaoan Yu Yunhan Zhang Xin Liu Tieliang Lv |
| author_sort | Yanfei Zhang |
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| description | The application of oxygen sensors based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) in the industrial field has received extensive attention. However, most of the existing studies construct detection systems using discrete devices, making it difficult to apply them in the industrial field. In this work, through the optimization of the sensor circuit, the size of the core components of the sensor is reduced to 7.8 × 7.8 × 11.8 cm<sup>3</sup>, integrating the laser, photodetector, and system control circuit. A novel integrated optical path design is proposed for the optical mechanical structure, which enhances the structural integration and long-term optical path stability while reducing the system assembly complexity. The interlocking design of the laser-driven digital-to-analog converter (DAC) and photocurrent acquisition analog-to-digital converter (ADC) reduces the requirements of the harmonic signal extraction for the system hardware. By adopting a high-precision ADC and a high-resolution pulse-width modulation (PWM), the peak-to-peak value of the laser temperature control noise is reduced to 2 m°C, thereby reducing the detection noise of the sensor. This oxygen detection system has a minimum response time of 0.1 s. Under the condition of a 0.5 m detection optical path, the Allan variance shows that when the integration time is 5.6 s, the detection limit reaches 53.4 ppm, which is ahead of the detection accuracy of similar equipment under the very small system size. |
| format | Article |
| id | doaj-art-c32ad4c0762b42b8b5367e4f0716bb13 |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-c32ad4c0762b42b8b5367e4f0716bb132025-08-20T03:29:02ZengMDPI AGSensors1424-82202025-06-012513402710.3390/s25134027On-Site and Sensitive Pipeline Oxygen Detection Equipment Based on TDLASYanfei Zhang0Kaiping Yuan1Zhaoan Yu2Yunhan Zhang3Xin Liu4Tieliang Lv5State Key Laboratory of Integrated Chips and Systems, College of Integrated Circuits and Micro-Nano Electronics, Fudan University, Shanghai 200433, ChinaState Key Laboratory of Integrated Chips and Systems, College of Integrated Circuits and Micro-Nano Electronics, Fudan University, Shanghai 200433, ChinaInstitute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, ChinaState Key Laboratory of Integrated Chips and Systems, College of Integrated Circuits and Micro-Nano Electronics, Fudan University, Shanghai 200433, ChinaState Key Laboratory of Integrated Chips and Systems, College of Integrated Circuits and Micro-Nano Electronics, Fudan University, Shanghai 200433, ChinaSchool of microelectronics, Fudan University, Shanghai 200433, ChinaThe application of oxygen sensors based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) in the industrial field has received extensive attention. However, most of the existing studies construct detection systems using discrete devices, making it difficult to apply them in the industrial field. In this work, through the optimization of the sensor circuit, the size of the core components of the sensor is reduced to 7.8 × 7.8 × 11.8 cm<sup>3</sup>, integrating the laser, photodetector, and system control circuit. A novel integrated optical path design is proposed for the optical mechanical structure, which enhances the structural integration and long-term optical path stability while reducing the system assembly complexity. The interlocking design of the laser-driven digital-to-analog converter (DAC) and photocurrent acquisition analog-to-digital converter (ADC) reduces the requirements of the harmonic signal extraction for the system hardware. By adopting a high-precision ADC and a high-resolution pulse-width modulation (PWM), the peak-to-peak value of the laser temperature control noise is reduced to 2 m°C, thereby reducing the detection noise of the sensor. This oxygen detection system has a minimum response time of 0.1 s. Under the condition of a 0.5 m detection optical path, the Allan variance shows that when the integration time is 5.6 s, the detection limit reaches 53.4 ppm, which is ahead of the detection accuracy of similar equipment under the very small system size.https://www.mdpi.com/1424-8220/25/13/4027tunable diode laser absorption spectroscopyoxygen detection |
| spellingShingle | Yanfei Zhang Kaiping Yuan Zhaoan Yu Yunhan Zhang Xin Liu Tieliang Lv On-Site and Sensitive Pipeline Oxygen Detection Equipment Based on TDLAS Sensors tunable diode laser absorption spectroscopy oxygen detection |
| title | On-Site and Sensitive Pipeline Oxygen Detection Equipment Based on TDLAS |
| title_full | On-Site and Sensitive Pipeline Oxygen Detection Equipment Based on TDLAS |
| title_fullStr | On-Site and Sensitive Pipeline Oxygen Detection Equipment Based on TDLAS |
| title_full_unstemmed | On-Site and Sensitive Pipeline Oxygen Detection Equipment Based on TDLAS |
| title_short | On-Site and Sensitive Pipeline Oxygen Detection Equipment Based on TDLAS |
| title_sort | on site and sensitive pipeline oxygen detection equipment based on tdlas |
| topic | tunable diode laser absorption spectroscopy oxygen detection |
| url | https://www.mdpi.com/1424-8220/25/13/4027 |
| work_keys_str_mv | AT yanfeizhang onsiteandsensitivepipelineoxygendetectionequipmentbasedontdlas AT kaipingyuan onsiteandsensitivepipelineoxygendetectionequipmentbasedontdlas AT zhaoanyu onsiteandsensitivepipelineoxygendetectionequipmentbasedontdlas AT yunhanzhang onsiteandsensitivepipelineoxygendetectionequipmentbasedontdlas AT xinliu onsiteandsensitivepipelineoxygendetectionequipmentbasedontdlas AT tielianglv onsiteandsensitivepipelineoxygendetectionequipmentbasedontdlas |