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<p>Hypergravity centrifuge testing simulates engineering problems under acceleration conditions far exceeding normal gravity, using scaled models to infer full-scale responses, and extensively employs sensors to monitor internal responses of the scaled models. To evaluate sensor performance under hypergravity environments, this study proposes a twin-sensor voltage referencing method for force traceability in hypergravity, and develops an <i>in-situ</i> calibration apparatus suitable for high-<i>g</i> environments. A systematic experimental study was conducted on three types of strain-based earth pressure sensors with different filling materials. The results show that hypergravity leads to a reduction in sensor range, a decrease in repeatability, and a significant increase in signal drift, with the latter being the key factor affecting measurement accuracy. On this basis, finite element and theoretical models were established to reveal the mechanisms of signal drift under hypergravity from the perspectives of sensor configuration and material properties. The models accurately predict the electromechanical response of sensors under conditions up to 300<i>g</i>, simplify <i>in-situ</i> calibration under hypergravity, and provide guidelines for the design optimization of pressure sensors in even higher-<i>g</i> environments.</p>

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In-situ calibration and experimental signal optimization for pressure sensors in hypergravity environment

  • 期刊论文

  • 发表日期：

    2026年1月4日

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  • Guanwen Liang,
  • Chengpeng Hong,
  • Longhua Guan,
  • Yong Lei,
  • Binghui Ma,
  • Haoran Fu,
  • Jianqun Jiang,
  • Yunmin Chen

摘要

Hypergravity centrifuge testing simulates engineering problems under acceleration conditions far exceeding normal gravity, using scaled models to infer full-scale responses, and extensively employs sensors to monitor internal responses of the scaled models. To evaluate sensor performance under hypergravity environments, this study proposes a twin-sensor voltage referencing method for force traceability in hypergravity, and develops an in-situ calibration apparatus suitable for high-g environments. A systematic experimental study was conducted on three types of strain-based earth pressure sensors with different filling materials. The results show that hypergravity leads to a reduction in sensor range, a decrease in repeatability, and a significant increase in signal drift, with the latter being the key factor affecting measurement accuracy. On this basis, finite element and theoretical models were established to reveal the mechanisms of signal drift under hypergravity from the perspectives of sensor configuration and material properties. The models accurately predict the electromechanical response of sensors under conditions up to 300g, simplify in-situ calibration under hypergravity, and provide guidelines for the design optimization of pressure sensors in even higher-g environments.