Title:
DISPLACEMENT DETECTION DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2023/037613
Kind Code:
A1
Abstract:
This displacement detection device comprises: a wave transmitter which transmits modulation waves having multiple frequencies to an object; a wave receiver which receives reflection waves from the object and generates a reception signal indicative of a reception result; and a control unit which controls transmission of the modulation waves by the wave transmitter and acquires the reception signal from the wave receiver. The control unit: outputs, during a first measurement period, a first transmission signal for causing the wave transmitter to transmit the modulation waves and acquires a first reception signal in response thereto; extracts first phase information that is indicative of a phase defined by a correlation between the first transmission and reception signals; outputs, during a second measurement period subsequent to the first measurement period, a second transmission signal to the wave transmitter and acquires a second reception signal in response thereto; extracts second phase information that is indicative of a phase in a correlation between the second transmission and reception signals; and detects a displacement of the object in the first and second measurement periods in accordance with the difference between the first phase information and the second phase information.
Inventors:
WATABE YUUMA (JP)
ASADA TAKAAKI (JP)
SASAKI SHINICHI (JP)
ASADA TAKAAKI (JP)
SASAKI SHINICHI (JP)
Application Number:
PCT/JP2022/010878
Publication Date:
March 16, 2023
Filing Date:
March 11, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
A61B8/08; G01S15/32
Foreign References:
| CN104808170A | 2015-07-29 | |||
| JPS5483795A | 1979-07-04 | |||
| JP2004191145A | 2004-07-08 | |||
| JPH09166661A | 1997-06-24 |
Other References:
H. KANAI ; M. SATO ; Y. KOIWA ; N. CHUBACHI: "Transcutaneous measurement and spectrum analysis of heart wall vibrations", IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL, IEEE, USA, vol. 43, no. 5, 1 September 1996 (1996-09-01), USA, pages 791 - 810, XP011437439, ISSN: 0885-3010, DOI: 10.1109/58.535480
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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