Study on magnetoresistive rotameter with high precision

Based on the detection mechanism of Quadrupole magnet, a high precision magnetoresistive rotameter is proposed in this paper. It mainly describes the signal processing method of rotameter, the design of system, the calibration experiments of the prototype and the result analysis. Offline simulation is carried out to improve the transducer structure, which shows that the meter's overall performance could be improved with the novel method. Experimental results and error analysis indicated that the precision of the magnetoresistive rotameter is better than 1%, with its grade at level 1.