The Art of Tactile Sensing: A State of Art Survey


This paper describes about tactile sensors, its transduction methods, state-of-art and various application areas of these sensors. Here we are taking in consideration the sense of touch. This provides the robots with tactile perception. In most of the robotic application the sense of touch is very helpful. The ability of robots to touch and feel the object, grasping an object by controlled pressure, mainly to categorize the surface textures. Tactile sensors can measure the force been applied on an area of touch. The data which is interpreted from the sensor is accumulated by the array of coordinated group of touch sensors. The sense of touch in human is distributed in four kinds by tactile receptors: Meissner corpuscles, the Merkel cells, the Rufina endings, and the Pacinian corpuscles. There has many innovations done to mimic the behaviour of human touch. The contact forces are measured by the sensor and this data is used to determine the manipulation of the robot.


Effect of Flexural Hinges in the design of a 2 DOF Compliant Microgripper


This paper aims at the design considerations in the design of a 2 DOF compliant microgripper. Aiming at the micro assembly of the MEMS components, microgripper forms a very important tool in the assembly of the optical switches to grasp and rotate the optical fibres comprising of a 2 DOF system. A compliant microgripper with 2 DOF is designed with different types of flexural hinges like circular, rectangular and corner fillet along with the variations of various parameters. The designed microgripper is analysed for different high resilience materials to test its compliance capability. The results prove that Corner fillet hinge provides maximum displacement amplification with minimum stress.


Development and Experimental Implementation of a Smart Irrigation System


Irrigation scheduling is crucial to effectively manage water resources and optimize profitability of an irrigated operation. There has been mounting pressure to limit water supply to irrigated agriculture and to produce more food with minimal water. Consequently, the search for technologies or measures to save or conserve water in irrigated agriculture has intensified all over the world. Tools that can be customized to a field’s characteristics can greatly facilitate irrigation scheduling decisions. Apart from the conventional timebased sprinkler or manual irrigation systems, this research deals with an efficient smart irrigation system for water conservation. The sensing system is based on a feedback control mechanism with a centralized control unit which automatically regulates the flow of water on to the field in real time based on various parameters such as instantaneous temperature, soil moisture, humidity and sunlight intensity. Thereby, achieving great savings on water consumed, controlling soil moisture status related to irrigation events, minimizing drainage and run-off events, and improving nutrient use efficiency.