OSCILLATING WAVE DETECTION METHOD AND DEVICE

摘要

Provided are an oscillating wave detection method and device capable of obtaining a Hilbert transform pair output as an instantaneous value in real time. The oscillating wave detection method causes an oscillating wave to propagate to a plurality resonance beams (51 to 5m), each resonating to a particular frequency, and detects oscillation of each of the resonance beams (51 to 5m) as an electric signal by using piezoelectric resistors (61 to 6m) arranged in the resonance beams (51 to 5m). The resonance beams (51 to 5m) are arranged so that positions of the respective resonators are arranged in a logarithmic linear form proportional to a logarithm of their resonance frequencies. When N is an integer not smaller than 2, the resonance beams (51 to 5m) are selected by every other N-1 and the outputs of the piezoelectric resistors (61 to 6m) are added so as to output a plurality of signals. More preferably, the N is an integer not smaller than 3 and the resonance beams (51 to 5m) are arranged and the resonance frequencies are set so that the ratio of the resonance frequencies of the resonance beams (51 to 5m) of every other N-1 is constant.