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Optical fiber bundle-based laser-induced fluorescence bleaching velocimetry

A fluorescent bleaching, velocimeter technology, applied in instruments, measuring devices, fluid velocity measurement, etc., can solve the problem of not being able to identify the velocity direction, etc.

Active Publication Date: 2021-08-20
NORTHWEST UNIV
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Problems solved by technology

[0004] The invention provides a laser-induced fluorescence bleaching velocimeter based on an optical fiber bundle, aiming to replace the single-core optical fiber or small hole in the detection part of the velocimeter with an optical fiber bundle, so as to solve the problem that the laser-induced fluorescence bleaching velocimeter cannot identify the direction of velocity

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  • Optical fiber bundle-based laser-induced fluorescence bleaching velocimetry
  • Optical fiber bundle-based laser-induced fluorescence bleaching velocimetry
  • Optical fiber bundle-based laser-induced fluorescence bleaching velocimetry

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[0053] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0054] The invention provides a laser-induced fluorescence bleaching velocimeter based on an optical fiber bundle, which aims to replace the single-core optical fiber or small hole in the detection part of the velocimeter with the fiber bundle, and solve the problem that the laser-induced fluorescence bleaching velocimeter cannot identify the direction of the velocity. In the embodiment of the present invention, the number of single-core optical fibers contained in the optical fiber bundle of the laser-induced fluorescence bleaching velocimeter based on the fiber bundle (hereinafter referred to as "LIFPA velocimeter") can be determined according to the specific applic...

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Abstract

The invention discloses a laser-induced fluorescence bleaching velocimeter based on an optical fiber bundle, which includes a measurement subsystem, which collects the output fluorescent signal by using a multi-core optical fiber bundle, and sends the fluorescent signal to an optical The detector measures the fluorescence signal received by each optical fiber in the multi-core optical fiber bundle, and then obtains the corresponding velocity and velocity direction of the fluid in the flow field through the corresponding numerical algorithm; solves the problem that the traditional LIFPA velocimeter cannot measure the fluid The problem of the velocity direction of the LIFPA velocimeter expands the application range and accuracy of the fluid velocity measurement.

Description

technical field [0001] The invention relates to the technical field of micro-nano flow field velocity measurement, in particular to a laser-induced fluorescence bleaching velocimeter based on an optical fiber bundle. Background technique [0002] Laser Induced Fluorescence Photo leaching Anemometer (LIFPA for short) technology is one of the latest micro-nano flow field velocity measurement technologies, which is mainly used in the design of micro-nano fluidic chips and the research of micro-nano fluid dynamics mechanism. Realize the measurement of the velocity of micro-nano flow field with high temporal and spatial resolution, the spatial resolution can reach tens to hundreds of nanometers, and the temporal resolution can reach more than 10kHz. [0003] LIFPA technology is mainly through the confocal microscope system. The excitation light beam generated by the continuous laser is focused on the flowing fluid through a high numerical aperture and high magnification lens. The...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/26G01P13/02
CPCG01P5/26G01P13/02
Inventor 王宇晨赵伟
Owner NORTHWEST UNIV