This paper presents a stretchable proximity-tactile sensor (PTS) using Carbon Micro Coils (CMC). The PTS consists of pairs of multiple active electrodes and a common ground electrode on the same plane. Thus, the sensor is tolerable to the repetitive contacts from external forces. The top layer consists of dielectric elastomer substrate mixed with 5% of CMC, so that it can respond to the proximity and tactile stimuli. Electrodes are located under the top layer and optimally organized to reduce the number of wirings. The sensor is fabricated by molding and casting methods. As the result, a 4 × 4 sensor prototype is made and its performance are experimentally evaluated.
This work presents a dual purpose sensor for collecting proximity and tactile information by using a composite with dielectric elastomer (DE) and Carbon Micro Coils (CMC). CMC is a coil-like carbon microstructure with the size of several hundred micrometers, and its electrical characteristics change with the distance between the object or via physical contact. Especially, the impedance change of the composite depending on the distance can be used as the principle for proximity sensing. We present a method to process the materials by using dielectric materials and additives. A prototype of the sensor is fabricated and its feasibility is experimentally validated.
The six axis F/T sensor is a primary component for the robotic technologies, but its high unit cost hampers the popularization to the robotic applications. In this paper, we present a six-axis force-torque capacitive sensor based on dielectric elastomer. Dielectric elastomer is compressed and deformed with external forces acting on it. Its deformation results in the variation of capacitance, which can be used as a kind of capacitive sensing scheme. The proposed sensor consists of plastic structure and dielectric elastomer capacitors. Since it takes a simple structure, it is possible to fabricate by using a plastic molding process, which results in extremely lower cost than existing off-the-shelf products. We present the basic structure and design of the sensor with the explanation of its working principle. A fabrication method dedicated to the sensor is developed and finally, a prototype will be demonstrated with calibration procedures.
In this paper, we propose a tactile display with a rigid coupling based on Dielectric Elastomer Actuator. The proposed
design of the tactile display is explained and its basic operational principles are discussed. It consists of three parts, that
is, actuator layer, coupling and upper layer. The rigid coupling is sandwiched between them. Because of the simplicity of
the design, the fabrication is extremely easy, that is just to bond the upper layer to the actuator layer after making EAP
actuator sheet and upper layer. The device is fabricated with multiply stacked actuators and its effectiveness is validated
experimentally.
In this paper we present a transparent and stretchable dielectric elastomer actuator(DEA). The device, called
"active skin" is under development as a new means of human interfaces. The active skin consists of elastomeric
films sandwiched between compliant patterned electrodes. Thus, depending on the properties of the elastomer
or electrodes, it is possible to realize a wide variety of implementations as transducers. As a critical issue of
the transparent active skin, transparency in the electrode including that of the substrate is challenging, which
has not been solved yet. In this paper, a compliant, transparent and highly conductive electrode layer on the
elastomeric film by using graphene is presented. The fabrication method of graphene electrodes dedicated to the
elastomeric materials is addressed and its compatibility to the existing materials is discussed. Also, preliminary
implementations on the embossed actuator are given to validate the proposed idea.
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