DAMAGE SENSORS AND PROCESSING ARRANGEMENTS THEREFOR

摘要

A damage sensing system, and a method of sensing damage using the system, are described. The system comprises: a plurality of tuned circuits arranged in parallel, each tuned circuit having a different resonant frequency; and processing means for discriminating the response of the different tuned circuits according to their respective different resonant frequencies, for example by processing changes in the respective Q-factors of the respective tuned circuits; wherein each of the plurality of tuned circuits comprises a respective damage sensor, each damage sensor comprising at least one direct write resistive element applied to an area of a substrate by a direct write process. Each tuned circuit may comprise a common resistor in series with the respective damage sensor. The plurality of the tuned circuits may be coupled to the processing means by a shared single pair of external connections.