| 摘要 |
The invention relates to an identification chip for insertion in an object located in a liquid. The identification chip comprises an acoustic resonator (100), which exhibits a number of distinct resonant frequencies, where the combination of resonant frequencies is unique to the identification chip. Th is enables the identification chip to be identified by exposing it to an acoust ic polling signal, measuring an acoustic response signal and analysing the frequency of the response signal. The resonator (100) comprises a cavity- forming part (110, 120) and a membrane (130). The acoustic resonant frequencies are determined by at least one cavity (140), which is enclosed b y the cavity~forming part (110, 120) and the membrane (140). The identificatio n chip can be implanted in a fish, with the object of identifying the fish whe n it is located in water.
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