Study on Magnetic Model and Magnetic Force of Magnetic Fluid in Pressure Difference Sensor

Abstract

Magnetic fluid is the key core of magnetic fluid sensor. Here magnetic model of magnetic fluid is analyzed. The magnetic curve of magnetic fluid is divided into 3 parts and the liner area is presented to make magnetic fluid sensor more sensitively. The magnetic force of magnetic fluid in magnetic field is calculated and analyzed. The magnetic permeability of magnetic fluid in sensor could be treated as a constant in the linear area of magnetization curve. And the magnetic force of magnetic fluid in magnetic field could be ignored if the length to diameter ratio of the solenoid is large enough.

A high magnetic field sensitivity PCF‐SPR sensor working in the near‐infrared wavelength band

“…The cladding of the designed structure is composed of SiO 2 , with its dispersion formula represented by the Sellmeier equation 15 :…”

“…The cladding of the designed structure is composed of SiO 2 , with its dispersion formula represented by the Sellmeier equation 15 : $$${n}^{2}=1+\frac{{A}_{1}{\lambda }^{2}}{{\lambda }^{2}-{B}_{1}^{2}}+\frac{{A}_{2}{\lambda }^{2}}{{\lambda }^{2}-{B}_{2}^{2}}+\frac{{A}_{3}{\lambda }^{2}}{{\lambda }^{2}-{B}_{3}^{2}}.$$$…”