Title:
ULTRASOUND DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/084836
Kind Code:
A1
Abstract:
An ultrasound device (100) is equipped with a piezoelectric element (120), a drive circuit (116), a receiving circuit (140), and a control circuit (114), and uses ultrasound to detect an object. The drive circuit (116) outputs a drive signal for driving the piezoelectric element (120). The receiving circuit (140) includes an arithmetic circuit (141) which receives input of a received signal outputted by the piezoelectric element (120), and calculates a cross-correlation coefficient between the received signal and a reference signal based on the drive signal. The control circuit (114) detects an object on the basis of the cross-correlation coefficient calculated by the arithmetic circuit (141). The frequency of the drive signal is constant. The reference signal is a signal which includes the frequency of the drive signal.
Inventors:
HATAKEYAMA HIROTOSHI (JP)
Application Number:
PCT/JP2020/029995
Publication Date:
May 06, 2021
Filing Date:
August 05, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01S15/10; G01S7/526
Domestic Patent References:
| WO2016167003A1 | 2016-10-20 |
Foreign References:
| JP2014232069A | 2014-12-11 | |||
| US20180156907A1 | 2018-06-07 | |||
| JP2014232072A | 2014-12-11 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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