发明名称 |
Device for measuring sound source distribution in three-dimensional space |
摘要 |
A device for measuring a sound source distribution in three-dimensional space is provided in which tracer particles included around an object are irradiated with a two-dimensional laser sheet within an x-y plane at two times separated by a short time interval, images of the irradiated tracer particles are taken, and two in-plane velocity components of the tracer particles in the laser sheet and one out-of-plane velocity component perpendicular to the laser sheet are measured based on the images taken. Further, the velocity field of the three velocity components in three-dimensional space is measured by obtaining three velocity components within a plurality of planes spaced apart in a z-axis direction perpendicular to the laser sheet and stacking the three velocity components within the plurality of planes in the z-axis direction. The sound source distribution around the object is measured from the velocity field. |
申请公布号 |
US8950262(B2) |
申请公布日期 |
2015.02.10 |
申请号 |
US201013505869 |
申请日期 |
2010.11.01 |
申请人 |
Honda Motor Co., Ltd. |
发明人 |
Teramura Minoru;Fukuchi Yuichi |
分类号 |
G01M9/06;G01H9/00;G01M17/007;G01P3/80 |
主分类号 |
G01M9/06 |
代理机构 |
Rankin, Hill & Clark LLP |
代理人 |
Rankin, Hill & Clark LLP |
主权项 |
1. A device for measuring a sound source distribution in three-dimensional space, the device comprising:
a particle image velocimetry system that irradiates, with laser light, tracer particles included in a flow field around an object at two times that are separated by a short time interval, and measures a velocity field of three velocity components in three-dimensional space from images at the two times of the tracer particles irradiated with the laser light taken by an imaging device; and sound source distribution measuring device that measures a sound source distribution around the object from the velocity field of the three three-dimensional velocity components, wherein the particle image velocimetry system irradiates tracer particles in the flow field with a two-dimensional laser sheet, obtains the three velocity components within a plurality of planes while moving the laser sheet, and measures the velocity field by stacking the three velocity components within the plurality of planes with the flow as a steady flow, and wherein the particle image velocimetry system comprises laser sheet irradiating device and the imaging device supported on a moving member that can be moved along a guide member disposed in a direction parallel to a laser beam that forms the laser sheet, the laser sheet irradiating device and the imaging device being moved while maintaining a fixed positional relationship. |
地址 |
Tokyo JP |