Patent ID: 8950262
Filing Date: 2015-02-10
Classification: G01H,G01M,G01P

Abstract:
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.