Sound wave processing device and ultrasonic system
AssigneeRohm Co., Ltd.
InventorTakahiro Tsuboi
Life of this patent
Estimating the term…
Abstract
A sound wave processing device includes a transmission signal generation unit that generates a transmission signal for transmitting a sound wave, a received wave signal output unit that outputs a received wave signal based on receiving the sound wave, a correlation-convolution integral processing unit that performs correlation-convolution integral processing in parallel for each reference wave data, on the basis of the received wave signal and a plurality of reference wave data, and an own wave identification unit that determines whether or not the received sound wave is own wave, which is a reflected wave of the sound wave transmitted by the transmission signal generation unit, on the basis of a correlation-convolution integral value output from the correlation-convolution integral processing unit.
Claims12
A sound wave processing device comprising:
- a transmission signal generation unit that generates a transmission signal for transmitting a sound wave;
- a received wave signal output unit that outputs a received wave signal based on receiving the sound wave;
- a correlation-convolution integral processing unit that performs correlation-convolution integral processing in parallel for each reference wave data, on the basis of the received wave signal and a plurality of reference wave data;
- and
- an own wave identification unit that determines whether or not the received sound wave is own wave, which is a reflected wave of the sound wave transmitted by the transmission signal generation unit, on the basis of a correlation-convolution integral value output from the correlation-convolution integral processing unit,
- wherein the own wave identification unit includes a correlation maximum value acquisition unit that acquires a correlation maximum value of the correlation-convolution integral value during a predetermined period for each of the reference wave data, and a determination unit that determines whether or not the received ultrasonic wave is the own wave, on the basis of relative evaluation of the acquired correlation maximum value.
Dependencies are inferred from the claim text.