Thermal Noise-Boosting Effects in Hot-Wire-Based Micro Sensors

Abstract

This article proposes an original approach aimed at modelling the noise density in sensors based on a single hot wire or pairs of thermally coupled wires. The model consists in an original combination of a previous electrothermal model of the wire with well-established assumptions on the thermal noise in conductors that carry moderate current densities. A simple method for estimating the model parameters with simple impedance spectroscopy is suggested. The predicted power spectral densities of the wire thermal noise differ from the result of previously presented analytical models, stimulating further experimental studies. The effects of the electrothermal feedback of both hot wires and hot-wire pairs on flicker noise is also intrinsically covered by the proposed approach.

Analysis of Thermal Characteristics of MEMS Sensors for Measuring the Rolling Period of Maritime Autonomous Surface Ships

“…In particular, the use of MEMS sensors in vehicles or machines is gradually increasing [14,15]. The importance of MEMS sensors is emphasized, and research on the thermal error of MEMS sensor is being actively conducted [16][17][18][19]. For example, research into the calibration suitable for the environment in which the sensor will be used.…”