Spiral Spring-Supported Force Plate with an External Eddy Current Displacement Sensor
Spiral Spring-Supported Force Plate with an External Eddy Current Displacement Sensor
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DOI：
10.3390/act12010016
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发表时间：
2023-01-01
期刊：
影响因子：
2.6
通讯作者：
Takahashi, Hidetoshi
中科院分区：
文献类型：
--
作者：
Kawasaki, Yuta;Takahashi, Hidetoshi
本研究提出一种以平面弹簧与电涡流位移传感器组成的测力板，以量测小型昆虫的地面反作用力，并揭示其运动特性。该测力板包括一块圆形铝板、四个对称连接在铝板上的铝弹簧和位于铝板下方的电涡流位移传感器。制造的板的直径和厚度分别为8和0.1 mm。弹簧宽度为0.4mm。当对板施加力时，板垂直向下移动。然后，涡流位移传感器非接触地检测板位移。所施加的力可以使用胡克定律来测量。所提出的测力板具有易于制造和成本效益的优点。通过仿真分析了所设计弹簧的中心位移变化和共振频率。然后，我们校准了制作的力板，以获得灵敏度变化和谐振频率。实验结果表明，所提出的测力板可以有效地测量一个小昆虫的GRF。
This study proposes a force plate with a planar spring and an eddy current displacement sensor to measure the ground reaction force (GRF) of a small insect and reveal its motion characteristics. The proposed force plate comprises a circular aluminum plate, four aluminum springs symmetrically connected to the plate, and an eddy current displacement sensor under the plate. The diameter and thickness of the fabricated plate were 8 and 0.1 mm, respectively. The spring width was 0.4 mm. When a force is applied to the plate, the plate moves vertically downward. Then, an eddy current displacement sensor detects the plate displacement without contact. The applied force can be measured using Hooke's law. The proposed force plate has the advantages of ease of fabrication and cost-effectiveness. The central displacement variation and resonant frequency of the designed springs were evaluated by simulation. Then, we calibrated the fabricated force plate to obtain the sensitivity variation and resonant frequency. The experimental results suggest that the proposed force plate can effectively measure the GRF of a small insect.