NORCE Norwegian Research Centre AS, 5008 Bergen, Norway.
Sensors (Basel). 2023 Jan 12;23(2):912. doi: 10.3390/s23020912.
A flexible weight sensor based on optical fibre macrobending loss, using 1550 nm wavelength light and small fibre bending path lengths is presented. An applied load depresses an impactor layer of cylindrical protrusions into a soft mat covered with optical fibre, causing the optical loss of the fibre to increase. An experimental study of two fibre types, two impactor materials, two impactor designs and a range of protrusion bend radii from 3 mm to 10 mm is shown. For weights greater than 2 kg, a linear response in optical loss (dB) is observed for an applied weight load in kg. The proportionality constant between loss and load, and thus the total amount of optical loss for up to 10 kg of weight load, can be tuned by changing the sensor physical parameters, shown here in ranges from 0.5 dB up to 25 dB.
提出了一种基于光纤宏观弯曲损耗的柔性重量传感器，使用 1550nm 波长的光和小的光纤弯曲路径长度。施加的负载会将一个圆柱形凸起的冲击层压入一个覆盖有光纤的软垫中，从而增加光纤的光损耗。对两种光纤类型、两种冲击器材料、两种冲击器设计以及从 3mm 到 10mm 的一系列凸起弯曲半径进行了实验研究。对于大于 2kg 的重量，在 kg 的施加重量负载下观察到光损耗（dB）的线性响应。损耗和负载之间的比例常数，以及高达 10kg 重量负载的总光损耗量，可以通过改变传感器物理参数来调节，这里显示的范围从 0.5dB 到 25dB。
