We are developing a minute tactile sensor having four cantilevers for sensing pressure and shear forces simultaneously and for distributing over a small area to recognize a certain area’s conditions. ...Toward our goal, another important task is to establish, in parallel with the sensor’s fabrication, a computing method that converts measured signals to applied forces. In this paper, we first investigate our sensing mechanism using a centimeter scale mockup of the actual sensor. Then, we formulate the relationship between the applied forces and the sensor outputs by a numerical analysis using a sufficient number of pairings of the forces and outputs. Finally, we examine the potential of the method.
In this paper, we describe development of a small six-component force/torque sensor based on the double-cross structure. First, we propose the double-cross structure that consists of serially ...connected parallel plate structures. Second, we explain how to use the parallel plate structure as a two-component force/torque sensor element that detects a force and a moment. Then the proposed force/torque sensor is shown to be designed as a six-component force/torque sensor with the ideal force sensitivity. A design detail of this sensor is explained and its prototype is shown. Finally, experimental results illustrate the performance of the prototype and the effectiveness of the proposed double-cross structure.
The durability of catalysts in ethanol synthesis by the hydrogenation of CO2 was investigated by means of XRD, TEM, and EDS. The K/Cu-Zn-Fe oxides catalyst was deactivated by the segregation of ...catalyst components to FeCO2, ZnO, and Cu during the reaction. The segregation was prevented by the addition of Cr component to the catalyst. Consequently, the K/Cu-Zn-Fe-Cr oxides catalyst indicates long catalytic life.
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