Device for measuring physical properties and / or changes in physical properties in a sheet material and sheet adapted for use with such a device

摘要

Device (1) for measuring physical characteristics or changes in physical characteristics in a sheet (2), provided with one or more sensors (3) embedded in the sheet (2), whereby the sensors (3) are meant to measure at least one of the aforementioned physical characteristics and generate or influence an electrical signal (8) as a function of a measured physical characteristic or a change in such a physical characteristic, whereby the device (1) also includes a signal processing unit (9) for processing the electrical signal (8) or the electrical signals (8) supplied to the signal processing unit (9) from the sensor (3) or the sensors (3).