Patent ID: 9535041
Date: 2017-01-03
CPC Classifications: A61B,G01N

Claim:
1. A propagation rate measurement device comprising: a wave transmitter configured to transmit signals toward a measurement object; a plurality of receivers configured to receive signals from the measurement object, and configured to output received signals corresponding to the signals that have been received; a propagation path setting component configured to set propagation rate of signals through the measurement object, and configured to calculate propagation paths up until the signals transmitted from the wave transmitter are received by the receivers; a propagation time calculator configured to calculate propagation time it takes for the signals transmitted from the wave transmitter to be received by the receivers based on the propagation paths; a Fourier transform component configured to generate Fourier transform data by subjecting the received signals outputted by the receivers to Fourier transform; a phase shifter configured to shift phase of the Fourier transform data for the receivers by frequency domain according to the propagation time; and a propagation rate derivation component configured to determine validity of the set propagation rate based on the Fourier transform data that has been shifted by the phase shifter.