Design And Characteristic Analysis Of Elastic Body Elastic Sensing Sensor

The sense of touch is an important means of general biology to perceive the world, scientists are researching how to simulate the human sense of touch feeling through the sensor and the mechanical structure, to show the realistic sense of touch feeling of human body. The so-called tactile sensing technology is to use certain sensitive element and mechanical structure to simulate the tactile sensation of human body. Magnetorheological elastomer(MRE) is a new kind of intelligent composite materials. The elastic modulus and damping features of it are controllable, at the same time, it has the characteristics of high stability compared with other intelligent materials. Currently applying MRE as sensitive element of tactile sensing technology’s research is not common yet, so using MRE as main functional material of tactile sensing actuator has great research value and development space.Based on tactile feedback technology and MRE as the background, the article applies MRE as main functional material of tactile sensing actuator, and mainly does the following work:(1) Research of the MRE’s compressed modulus of elasticity. In theory, relations among magneto elastic modulus of MRE and the size of magnetic induction and the strain of MRE was deduced from the microscopic view. From three aspects of the magnetic field direction, the preparation of magnetic field and the material proportioning, the article finds the MRE which has the maximum absolute magnetorheological effect and the maximum relative magnetorheological effect through the theoretical and experimental test and analysis.(2) Design of the MRE tactile sensing actuator. First of all, the article sets up the actuator model and optimizes the model; then establishes mathematical model, and theoretically calculates for the model’s feedback force; finally through the computer simulation, calculates the model of the parts parameters.(3) Optimization of the traditional preparation of MRE. The article prepares MRE which has certain elasticity, good deformation recovery ability, no small gap between the internal substrate and the evenly distributed carbonyl iron powder particles through the contrast analysis of observation in three aspects of the preparation of temperature, the loading manner of the magnet and material proportioning.(4) Design experimental test platform of the MRE tactile sensing actuator and test the relationship among the actuator force feedback、load current and button trip. The article puts forward the application solutions of MRE tactile sensing actuator in car suspension and foot massage.