Measurement of Self-Noise of Magnetic Sensors Based on Parallel Test Data

Abstract

The article presents experimental results of parallel testing of component magnetic sensors of various types—coil, torque optical-mechanical, and magnetomodulation. Experimental estimations of the level of self-noise of tested sensors are produced and compared with early known data. It has been experimentally determined that the most reliable and stable estimation of self-noise may be obtained in the group of sensors of the same type or by deliberately using a less noisy sensor as a reference. It is shown that experimental estimation of self-noise for coil sensor may significant differently from a theoretical one in the range of low frequencies. It is shown that a coil sensor has the best noise performance, whereas a sensor based on magnetomodulation transducer is the noisiest.