DAMAGE SENSORS AND PROCESSING ARRANGEMENTS THEREFOR
First Claim
1. A damage sensing system, comprising:
- a plurality of tuned circuits arranged in parallel, each tuned circuit having a different resonant frequency; and
processing means for discriminating a response of different tuned circuits according to their respective different resonant frequencies, wherein each of the plurality of tuned circuits includes a respective damage sensor, each damage sensor having at least one direct write resistive element applied to an area of a substrate by a direct write process.
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Accused Products
Abstract
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.
27 Citations
37 Claims
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1. A damage sensing system, comprising:
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a plurality of tuned circuits arranged in parallel, each tuned circuit having a different resonant frequency; and processing means for discriminating a response of different tuned circuits according to their respective different resonant frequencies, wherein each of the plurality of tuned circuits includes a respective damage sensor, each damage sensor having at least one direct write resistive element applied to an area of a substrate by a direct write process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of sensing damage, the method comprising:
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providing a plurality of tuned circuits arranged in parallel, each tuned circuit having a different resonant frequency; and discriminating a response of the different tuned circuits according to their respective different resonant frequencies wherein each of the plurality of tuned circuits includes a respective damage sensor, each damage sensor having at least one direct write resistive element applied to an area of a substrate by a direct write process. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification