Analysis of parameter effects on thrust force and optimum driving frequency in an electrostatic induction dielectric sheet conveyor
In recent years, electrostatic induction has been introduced as a new approach for transporting dielectric sheets. Electrostatic Induction Sheet Conveyor (EISC) is a kind of electrostatic induction actuator which can directly handle dielectric sheet objects, such as papers and plastic films in asynchronous state. The capability of sheet handling demands more studies to recognize parameters influencing thrust force and optimum driving frequency of dielectric sheets in this actuator. In this paper, using the proposed model in previous work, the effect of parameters including geometric parameters of slider and stator, electrical properties of dielectric sheet and environmental conditions on thrust force and optimum driving frequency of the actuator were analytically investigated.
A 2-DOF electrostatic sheet conveyer using wire mesh for desktop automation
The present paper proposes an electrostatic actuator that realizes two-degree-of-freedom (DOF) motion of various sheet-like objects. The actuator utilizes electrostatic actuation technology based on induced charges. The technology can directly handle sheet objects, such as papers and plastic films with a particular surface resistance. The structure of the actuator is flat and thin, and thus it can be easily embedded on any desktop so that the desktop can have a function to physically interact with users. With the function, the desktop can be automated in such a way that it drives various objects on it to help users perform various desktop tasks. The prototype actuator presented here uses wire mesh as its electrode panel to realize two-DOF motion. The structure of the wire mesh and basic driving principle of two-DOF actuation are described. The challenge that arises when utilizing wire mesh panel is that actuations for objects can be sometimes coupled if there are multiple objects on the panel; for example, if we try to move only one object, the other objects nearby would move together unexpectedly. To solve this problem, the paper proposes a selective actuation technique that realizes handling of any one object with keeping other objects at rest
Frequency selective surface design for blinds applications
In this paper, the reconfigurable blind structure with frequency selective surfaces(FSS) for the building applications are presented. Frequency transmission characteristics for different angles of the proposed blind-FSSs are investigated and verified through simulation and measurement. The simulation results show that we can implement the reconfigurable blind-FSS for multiband wireless applications. To verify the proposed paper, two kinds of blind-FSSs, crossed dipole FSS and circular ring FSS are fabricated and measurements are performed for different angles. The proposed structure in this paper which is very simple, can be easily applied to any planar surface for wireless security applications at low cost.