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<p>This study introduces the M-HEAT (modified HEAT) sensor, developed to measure real-time ablation levels specifically tailored for P50 cork, based on NASA's HEAT sensor technology. The NiCr resistance wire was chosen for its high sensitivity in fabricating the M-HEAT sensor. Additionally, to minimize structural damage and heterogeneity during measurement, the M-HEAT sensor is crafted with a smaller diameter compared to its predecessor. A novel manufacturing approach is employed for the M-HEAT sensor, involving resin injection into a tubular structure to effectively reduce the sensor's diameter. For the ablation test, block-type specimens embedded with the M-HEAT sensor were fabricated, and experiments were conducted to measure ablation. The ablation depths estimated by the M-HEAT sensor were compared and verified with those measured by X-ray computerized tomography. Eight ablation tests demonstrated that the M-HEAT sensor proposed in this study has excellent estimation performance, with an average absolute error of 0.11&#xa0;mm for a gauge length of 6.0&#xa0;mm and an average relative error of 3.8%. In the future, M-HEAT sensors are expected to be applied to real structures exposed to aerodynamic heating environments by enhancing sensor durability and integrity.</p>

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Development and Fabrication of the High-Sensitivity M-HEAT Sensor for Real-Time Ablation Depth Estimation and Measurement Accuracy

  • 期刊论文

  • 发表日期：

    2025年3月6日

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  • Myeong-Gi Kim,
  • Sang-Woo Kim,
  • Yeon-Gwan Lee

摘要

This study introduces the M-HEAT (modified HEAT) sensor, developed to measure real-time ablation levels specifically tailored for P50 cork, based on NASA's HEAT sensor technology. The NiCr resistance wire was chosen for its high sensitivity in fabricating the M-HEAT sensor. Additionally, to minimize structural damage and heterogeneity during measurement, the M-HEAT sensor is crafted with a smaller diameter compared to its predecessor. A novel manufacturing approach is employed for the M-HEAT sensor, involving resin injection into a tubular structure to effectively reduce the sensor's diameter. For the ablation test, block-type specimens embedded with the M-HEAT sensor were fabricated, and experiments were conducted to measure ablation. The ablation depths estimated by the M-HEAT sensor were compared and verified with those measured by X-ray computerized tomography. Eight ablation tests demonstrated that the M-HEAT sensor proposed in this study has excellent estimation performance, with an average absolute error of 0.11 mm for a gauge length of 6.0 mm and an average relative error of 3.8%. In the future, M-HEAT sensors are expected to be applied to real structures exposed to aerodynamic heating environments by enhancing sensor durability and integrity.