A State-of Art of Creative Sensor Devices Utilizing Magneto- Rheological Fluids

Abstract

This article presents the state-of-the-art sensors design based on magneto-rheological (MR) fluid. In smart materials, the magneto-rheological fluid is one of the prominent material, which changes rheological properties on application of magnetic field. The MR fluid is mainly used for designing the dampers, clutches and mounts for heavy vehicle systems. However, the MR fluid can also be used for sensor design applications, which has not been much reported in the literature. This review paper summarizes the design of following novel sensors such as resonant, current, magnetic flux and tactile sensors designed using MR fluid. First, this article introduces the design and development of resonant based measurement system used for studying the properties of magneto rheological fluid. Secondly, this paper discusses about the novel electrical current measurement technique using MR fluid in shear mode of operation. This paper discuss on the design of novel variable resistor using the behavioural change of MR fluid in third. Finally, the design of tactile display utilizing magneto rheological fluid is introduced and discussed. Tactile display is used in robotic system in minimally invasive surgery (MIS) to provide a surgeon tactile information of touching remote biological tissues or organs. This review article will motivate the readers to design the novel sensors using magneto-rheological fluid with advanced technology.

Preliminary experimental evaluation of a novel loudspeaker featuring magnetorheological fluid surround absorber

“…The principal of damping system in loudspeaker basically can be done by controlling MRF shear yield stress in the surround gap area. This technique is carried out by making changes of the surround resonant occurred frequency due to in viscosity of the MR fluid input electrical current to the coil [28]. Figure 1 shows that O-Ring was designed to accommodate the MRF container by two layers.…”

A review on design and modelling methods of magnetic circuit cores for MR elastomers and MR fluids based system

“…Since MR damper can generate high damping force, Do and Choi [18] investigated the design configuration of MRF mount considering vibration control subjected to high load, principal design parameters of the pressure, magnetic field, dimension, the stiffness and damping, and the operation capability. On the other hand, Kaluvan et al [19] reviewed MRF as sensor applications instead of actuators. It has been introduced that MRF can be utilized to measure the resonance of vibration modes, current level, flux magnitude, MRF variable resistor, field-dependent tactile device, and stiffness controllable tactile device.…”

“…The shear storage modulus of the MRE, including 25% volume fraction of magnetic particles, 25%-volume of filler as BASF SQ ® with average 3.9-5 µm in diameter, 50% volume of silicon rubber as Eco-flex ® 00-20 is determined through experiment as [50] G (kPa) = −1283f 4 + 1904f 3 − 271.2f 2 + 73.81f + 55. 19.…”

Analysis of a combined clutch with an electrorheological fluid

“…Electrorheological (ER) and magnetorheological (MR) fluids due to theability to change their properties under the influence of electric and magnetic field [7][8][9][10], are used in various engineering, such as valves [3,[11][12][13][14][15][16][17][18], hydraulic vibration dampers [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34], hydraulic actuators [35,36], seat suspension for vehicles [37], and hydraulic clutches [38][39][40][41][42][43][44][45].…”