Magnetoresistive micro-displacement sensor based on magnetorheological fluid

Abstract A novel magnetoresistance material based on magnetorheological fluid (MRF) was developed for applications in micro-displacement sensor. The MRF samples were fabricated by dispersing carbonyl iron particles (CIP) into a magnetic ion liquid (MIL) composed of 1-methylethyl ether-3-butylimidazole cation and [Fe 2 Cl 7 ] − anions. characteristics also systematically tested. It found that the resistance value with CIP content 20 vol% decreased from 125 to 24.4 KΩ when increasing field 0 0.2 T. sensor device study displacement sensing MRF, had high sensitivity 0.1 Ω μ m −1 resolution 10.0 m. excellent performance can be attributed low modulus good stability MIL matrix, allowing easy change controlling or displacement. In summary, these unique characters make present promising potential