可使用紫外线或离子感应棒。
它的模型有一个双面镜像系统。该系统直接把阳光投射进一块小型(1平方厘米大小)光伏电池的光学感应棒上。
Its model involves a two-mirrored system that directs sunlight down an optical rod onto a small (1 square centimeter) photovoltaic cell.
应用该模型计算了超磁致伸缩力传感器空气隙中的磁感应强度和磁致伸缩棒上施加力的关系，并与实验值进行了比较。
Using the proposed model, the relation between the magnetic flux density in the air of the giant magnetostrictive force sensor and the value of force applied on the magnetostrictive rod is calculated.
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