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We have proposed a vision-based cutaneous sensor for telexistence that can simulate the physical interaction between a human fingertip and an object. The proposed sensor comprises a finger-shaped GelForce and a thermo-sensitive paint. The finger-shaped GelForce enables us to measure tactile information in terms of the distribution of forces that are calculated from the displacements of markers inside...
In this study, we propose new type of a low-cost flexible tactile sensor which can detect 3-axial force and suitable for intelligent robot fingers. In order to propose innovative device, problems of previous studies about materials and structures were analyzed and fabrication process is used by the polymer micromachining technique. The designed tactile sensor is comprised of several micro force-sensing...
This paper describes identifying Tactile Walking Surface Indicators (TWSIs) with a white cane using an accelerometer. The vibration was examined by using an actual dot block. The effectiveness of the white cane was verified by examining the relation between the vibration and psychological strength. The experiment result revealed that there is no correlation between the psychological distance and the...
The authors previously proposed an artificial hollow fibre for use as a microelectromechanical systems (MEMS) material to produce a wearable sensing system and developed a fabric tactile sensor to apply to it. In this Letter, the authors developed a ball-shaped projection for producing the umbonal fibre to improve sensing performance for normal- and lateral-forces detection. An adhesive was manually...
The authors previously proposed a type of fabric tactile sensor produced by weaving artificial hollow fibres such as clothes. In this study, the authors enlarged its size by using a handloom and investigated the characteristic of the contacted object detection. The authors produced two kinds of fabric tactile sensors having different sizes 87.5×52.0×mm and 180.0×56.0×mm. The pitch values of the detection...
We previously proposed a fabric-type tactile sensor fabricated by using an artificial hollow fiber to produce a wearable sensing system. We now are presenting our newly-developed fabric force sensor, which can detect both normal and lateral forces, that uses an umbonal fiber. The artificial hollow fiber was fabricated by depositing thin metal and an insulation layer on an elastic hollow fiber. We...
We developed a tensional force sensor by applying artificial tetrafluoroethylene-perfluoroalkylvinyl ether copolymer (PFA) hollow fibers. The fibers were fabricated by depositing thin metal and an insulation layer on the PFA tube, and the fabric sensor was made by weaving the decorated PFA tube and the conventional cotton yarns together. The sensor was 57.0 times 4.0 mm. The sensor output linearly...
It is expected that the use of haptic sensors to measure the magnitude, direction, and distribution of a force will enable a robotic hand to perform dexterous manipulations. Therefore, we have developed a new type of finger-shaped haptic sensor that can measure a three-dimensional force vector field over a contact surface. The sensor consists of a transparent elastic body, two layers of internal blue...
We proposed an artificial hollow fiber structure as a new material for MEMS, and applied it for realizing a novel type of fabric tactile sensor. The hollow fiber structure is fabricated from commercially available silicone rubber tube by laminating a metal and an insulation layers on the surface. The fabricated hollow fiber is 250 mum in external diameter and 40 mum in thickness. The fabric tactile...
We previously proposed an artificial hollow fiber, as a new MEMS material, for the development of a fabric tactile sensor. The artificial hollow fiber is fabricated by uniformly laminating metal and insulation layers onto the surface of an elastic hollow fiber. The fabric tactile sensor is made by weaving the modified hollow fibers into a cloth. The sensor can detect the contact force by measuring...
We designed and made a micro meter sized arrayed actuator device for use in a tactile display. Each actuator uses a liquid-vapor phase change to drive a micro needle that stimulates receptors in a finger that is in contact with the array. The actuators consist of a flexible diaphragm structure and a bottom plate, which are bonded to create a cavity between them. A micro needle and a micro heater are...
This paper proposes an active tactile sensor driven by using piezo-electrical actuator. It consists of a silicon diaphragm having piezoresistive strain sensors for measuring displacement of the diaphragm, and a piezoelectric actuator for driving the sensing element. The proposed active tactile sensor has an advantage in that it can detect the multiple physical values, elasticity and impact resilience...
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