Use of Magnetic Fluid in Accelerometers

Abstract

Magnetic fluid accelerometer is designed based on the special physical properties of magnetic fluid. Compared with the conventional acceleration sensors, magnetic fluid accelerometer has stronger shock resistance capability, higher sensitivity, lower energy consumption, and better performance in low frequency response. It satisfies the growing requirements of acceleration sensors. In this paper, the dynamic model and the theory of magnetic fluid accelerometers were presented. The structure characteristics of typical magnetic fluid accelerometers were investigated, and the development trend of magnetic fluid accelerometers in the future was also predicted. Besides, a novel accelerometer with linearity better than 1.5% and sensitivity better than 75 mV/g was proposed.

Research on the Axial Magnetic Levitation Force Acting on the Ring Magnet Suspended in Magnetic Fluid : Considering a Radial Eccentricity

“…Suppose that the region of the magnetic fluid is infinite with no flux refraction effect as shown in Fig. 4(a), and the magnitude of magnetic field intensity is (20) Let D remain the same for the time being with C varies within the range of 0-10 mm, we can get H over the plane whose axial distance is D from the bottom of the magnet (or H over S cb ). Then change the value of D, and the magnitude of magnetic field intensity is shown in Fig.…”

“…For the typical application of the self-levitation of permanent magnet in magnetic fluid, for example, magnetic fluid sensor [20,21], damper [22,23] or energy harvester [24] the diagram of which is shown in Fig. 1.…”

Applied magnetic field effect on core mode properties of MFPCF

“…MFs have the flexibility of being liquid compared with solid materials and react even in low magnetic fields. The properties of MF change under the magnetic field, and offer many advantages, attracting much research that includes photonics of visible light to millimetre wave [1], accelerometer sensors [2], and biomedical applications such as hyperthermia [3] and magnetic resonance interferometry [4].…”

Research on a novel magnetic fluid micro-pressure sensor

“…Magnetic fluids, as a new functional material, are already widely used in many engineering applications due to their outstanding magnetic and rheological properties [2,3]. One of the applications of magnetic fluid was in sensing techniques for aerodynamic measurements, micro-pressure, inclination, or acceleration [4][5][6][7][8], and their advantages consist of the simple structure, low cost, high reliability, and convenience of replacement. In general, the sensing and measuring devices are based mainly on the self-levitation of an immersed magnet [9] and the magnetic behavior of the magnetic fluid as a working element [10][11][12][13].…”