New self excited accelerometers based on magnetostrictive delay lines

Acceleration measurements are important in many cases, especially considering applications For the automotive industry [ 11. Requirements for repeatable. secure and low consumption response of accelerometers are important in this highly increasing sensor market, an example being their use in airbags. In this paper, we demonstrate a new magnetostrictive delay line (MDL) set-up for the detection of acceleration, requiring no excitation means for the sensor. Experimental results indicate absence of hysteresis, thus allowing a good level of uncertainty.