论文标题
强度调节的光纤应变传感器，用于在干燥过程中连续测量地下食物变形
Intensity-modulated optical fiber strain sensor for continuous measurements of below-the-surface food deformation during drying
论文作者
论文摘要
我们提出一个MM尺度的光纤应变传感器，以在干燥过程中连续测量表面下方的食物变形。传感器具有软缓冲套筒，可实现大型可测量的变形范围，并最大程度地减少对天然食物变形的影响。理论上和实验研究了传感器的性能。为了证明食物中的应用，我们在长达4小时的空气干燥过程中将传感器嵌入新鲜的香蕉片中，在此过程中，其湿的基础水分含量从约80％降至40％。通过与计算机视觉测量的表面应变的比较，纤维传感器的测量值涵盖了〜20％的香蕉切片的全法向应变，并揭示了空间和时间依赖性的壳体硬化特性。我们的工作提供了一种前所未有的应变传感器，该传感器具有很高的潜力，可以促进对食物干燥过程的基本理解和过程监测。
We present a mm-scale optical fiber strain sensor to continuously measure the food deformation below the surface during the drying process. The sensor has a soft buffer sleeve, which enables a large measurable deformation range and minimizes the influence on the native food deformation. The sensor performance was investigated both theoretically and experimentally. To demonstrate the application in foods, we embedded the sensor inside fresh banana slices during a 4-hour-long air-drying process, where its wet basis moisture contents dropped from around 80% to 40%. The fiber sensor measurements covered the full normal strain of ~20% of the banana slices and revealed the shell-hardening characteristics in both the spatial and time dependences, by the comparison with the surface strains measured by the computer vision. Our work provides an unprecedented strain sensor that holds a high potential to contribute to improving both fundamental understandings and process monitoring of food drying processes.
