Temperature Distribution Sensor Based on Magnetostrictive Delay Lines

In this paper we propose a new family of temperature distribution sensors based on the magnetostrictive delay line technique. An array of parallel conductors is set orthogonal to the delay line and used for pulsed current transmission. coil is set around the one end of the delay line in order to receive the magneto-elastic pulses. A platinum wire or a thermistor is electrically connected to the end of each pulsed current conductor, being subjected to temperature changes. Variation of temperature changes the resistance of each platinum wire or thermistor and therefore changes the amplitude of the pulsed current, used to generate elastic pulse along the magnetostrictive delay line. We achieved a mechanically flexible temperature distribution system with 0.1 K temperature sensitivity at each sensing point as well as a 5 cm spatial resolution in a range of 10 m.