公开(公告)号：US08567259B1

公开(公告)日：2013-10-29

申请号：US13025031

申请日：2011-02-10

Applicant: Glenn W Ballard ,  Peter Vorobieff

Inventor： Glenn W Ballard ,  Peter Vorobieff

IPC: G01F1/32

CPC classification number: G01F1/3209

Abstract: An optical shift fluid flow velocity measurement mechanism is shown and described. A fluid flows over a bluff body to produce a vortex street. Downstream of the bluff body a light beam emission source directs a beam of light towards a lenslet including a light transmission gradient. Light transmitted through the lenslet is perceived by a photovoltaic cell which generates an electrical signal. Vortices in the vortex stream disrupt the light beam, affecting the amount of light transmitted through the lenslet and perceived by the photovoltaic cell, thereby changing the electrical signal. The frequency of the changes in the electrical signal can then be correlated to the velocity of the fluid flow.

Abstract translation: 示出并描述了光学偏移流体流速测量机构。 流体流过虚张声势的身体以产生涡街。 在非流线形体的下游，光束发射源将光束引向包括透光梯度的小透镜。 透过小透镜的光被产生电信号的光伏电池感知到。 涡流中的涡流破坏光束，影响透过小透镜并被光伏电池感知的光量，从而改变电信号。 然后电信号变化的频率可以与流体流速相关。