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Flexible dielectric barrier discharge (FDBD) is characterized by near-room-temperature, low-power operation and mechanical flexibility, and shows strong potential for air disinfection and skin-contact therapies. However, continuous discharge can cause local heat accumulation that modifies reactive-species distributions and risks thermal skin damage, so safe and controllable surface temperature has become a key requirement. In this study, an infrared thermal imaging sensor is employed to monitor the temperature distribution in the discharge region in real time. A first-order temperature-rise model is identified from open-loop experiments, and the corresponding transfer function is derived. Based on this model, a PI controller is designed and implemented on an STM32 microcontroller to regulate the average temperature in the discharge area. Experimental results show that, compared with open-loop operation, the proposed closed-loop scheme shortens the temperature rise time, suppresses excessive heating and improves robustness to disturbances, thereby enhancing the safety and biocompatibility of FDBD in medical applications.

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Real-Time Surface Temperature Control Strategy for Flexible Dielectric Barrier Discharge

  • 会议论文

  • 发表日期：

    2026年

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  • Zongyong Li,
  • Miao Lyu,
  • Le Yang,
  • Qiaojue Liu,
  • Shuqun Wu

摘要

Flexible dielectric barrier discharge (FDBD) is characterized by near-room-temperature, low-power operation and mechanical flexibility, and shows strong potential for air disinfection and skin-contact therapies. However, continuous discharge can cause local heat accumulation that modifies reactive-species distributions and risks thermal skin damage, so safe and controllable surface temperature has become a key requirement. In this study, an infrared thermal imaging sensor is employed to monitor the temperature distribution in the discharge region in real time. A first-order temperature-rise model is identified from open-loop experiments, and the corresponding transfer function is derived. Based on this model, a PI controller is designed and implemented on an STM32 microcontroller to regulate the average temperature in the discharge area. Experimental results show that, compared with open-loop operation, the proposed closed-loop scheme shortens the temperature rise time, suppresses excessive heating and improves robustness to disturbances, thereby enhancing the safety and biocompatibility of FDBD in medical applications.