| 摘要 |
A surface-acoustic wave resonator type vibration sensor, comprising a first antenna (101), a matching network (102), a reflecting grating (103) and an interdigital transducer (104), wherein at least the reflecting grating (103) and the interdigital transducer (104) are arranged on a piezoelectric substrate (105), the matching network (102) comprises an optimum matching network composed of at least one capacitor (C1) and at least one inductor (L1), the optimum matching network is further connected in parallel with an acceleration detection circuit, the acceleration detection circuit comprises a plurality of branch circuits which are connected in parallel, and the number of branch circuits merged into the optimum matching network is different at different accelerations. The acceleration detection circuit is arranged in the matching network, so that there is no need to increase the area of the piezoelectric substrate, the circuit has a simple structure, occupies a small space and saves costs. Also provided is a vibration detection system, comprising a reader, a signal processing module and a vibration sensor. |
