Simultaneous Measurement of Loading Position and Loading Weight by Using a Deflection Mechanism of an H-slit type Double Beam Load Cell

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  • H形スリットを持つダブルビーム型ロードセルの変形機構を用いた荷重位置と実荷重の同時測定
  • Hガタ スリット オ モツ ダブルビームガタ ロードセル ノ ヘンケイ キコウ オ モチイタ カジュウ イチ ト ジツ カジュウ ノ ドウジ ソクテイ

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Abstract

The H-slit beam structure is an effective structure used in design of force sensor. It can enlarge sensitivity while it keeps enough rigidity and stiffness. One of the characteristics of the H-slit beam structure is that its deformation pattern is same as that of a four bar link mechanism. In this kind of mechanism, it is highly important to show recovery from deformation force under specific distance between the parallel beams. Like a Roberval balance mechanism, the H-slit beam structure is also capable of moment canceling though the mechanism involved in it has not been explicitly developed. This paper investigates the efficiency of the H-slit beam structure by comparing the generated strains of it with that of the Roberval mechanism. Here the strain is calculated by using FEA (Finite Element Analysis) and experimental models. All of the results show that the H-slit beam structure is effective in canceling the moment due to the distance between strain signal sensing position and loading position. The results also demonstrate that when the distance between two parallel beams in the structure is too narrow, the structure will become ineffective for moment canceling.

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