Title:
粒子画像撮像方法及び粒子速度分布作成方法
Document Type and Number:
Japanese Patent JP7281396
Kind Code:
B2
Abstract:
To provide a particle image pickup method for visualizing a sound field through PIV without using a high-speed camera, and a flow velocity distribution creation method.SOLUTION: A particle velocity distribution creation method (S20) includes the steps of: obtaining a flow velocity distribution (S22); obtaining a pseudo particle velocity distribution (S24); and obtaining a particle velocity distribution (S26). In the step of obtaining the flow velocity distribution (S22), the flow velocity distribution is obtained according to a particle image flow velocity measurement method using particle images on the two times. In the step of obtaining the pseudo particle velocity distribution (S24), the pseudo particle velocity distribution consisting of a vibration component in a frequency fA is obtained by removing a DC component caused by an air flow by performing Fourier transform on the flow velocity distribution on the time base. In the step of obtaining the particle velocity distribution (S26), the particle velocity distribution is obtained by multiplying a pseudo particle velocity in the pseudo particle velocity distribution by fS/fA.SELECTED DRAWING: Figure 1
Inventors:
Shinpei Sawaki
Yuzo Tsuchiya
Yuzo Tsuchiya
Application Number:
JP2019238135A
Publication Date:
May 25, 2023
Filing Date:
December 27, 2019
Export Citation:
Assignee:
Toda Construction Co., Ltd.
International Classes:
G01H9/00; G01P13/00
Domestic Patent References:
| JP2018105857A | ||||
| JP48082874A | ||||
| JP2004020385A | ||||
| JP2007085784A | ||||
| JP2012145502A |
Foreign References:
| WO2007049693A1 |
Other References:
武岡成人,阿久津真理子,及川靖広,山崎芳男,高速度カメラを用いたPIV法による音場収録,日本音響学会講演論文集,日本,日本音響学会,2010年03月,2010年春季,pp. 1451-1452,[検索日 2023.04.26] インターネット:
Attorney, Agent or Firm:
Yukio Fuse
Michie Obuchi
Michie Obuchi