Abstract
Keywords
Temperature Sensor; Contact less; Magnetic coupling; Curie point.
Abstract
A new system of temperature sensor is presented in this article. It's a kind of magnetic sensor: the measurement probe is made of materials whose magnetic properties, such as the polarization and the permeability, are very sensitive to temperature variations. These soft magnetic alloys are strongly temperature dependent and could be used like sensitive probe. The contact less principle of temperature measurement is also discussed in this paper. This principle consists in avoiding electrical and mechanical contacts between probe (magnetic alloy) and electronic parts of the sensor so that the measurement is provided only by the intermediary of a remote magnetic coupling. As a means of illustrating the feasibility of this new measurement concept, two simple structures are presented.