Nowadays customised sensors and actuators are very important in order to optimise and control process parameters of engines, machines and other moving parts. Wireless interrogation of the sensors is necessary in order to gain information from hidden spots within the engine or from rotating shafts, axles or car tyres. Therefore we have exploited the possibility of using magneto-elastic wires as sensor elements to monitor the frictional conditions between the tyre and the roadway in order to enhance the active vehicle safety. In vehicles having wheels with rubber tyres, the deformation and forces that occur in the tyre material provide information about the driving status of the vehicle. Especially, it is possible to monitor current frictional conditions between the tyre and the roadway. This information can be used for calculating the force transmission that takes place between the tyre and the roadway and for registration of the so-called 'slip position', which indicates the loss of gripping power even before the tyre begins to slip. As a consequence such a sensor can be implemented for the development of new tyres with improved force transmission at different driving conditions as well as in the development of an improved ABS-system. Magneto-elastic wires are extremely sensible to small changes of applied mechanical stresses due to the inverse magnetostrictive effect.
Wireless tyre sensors based on amorphous magneto-elastic materials
Drahtlose Reifensensoren auf der Grundlage von amorphen, magneto-elastischen Werkstoffen
2001
5 Seiten, 4 Bilder, 2 Quellen
Conference paper
English
Wireless Tire Sensors Based on Amorphous Magneto-Elastic Materials
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