Device for recording air velocity field information and method thereof

A technology of air velocity and field information, applied in the optical field, can solve the problems of small time interval, inaccurate measurement results, low measurement frequency, etc., to achieve the effect of reducing the frame rate and increasing the measurement frequency

Pending Publication Date: 2017-05-24
TSINGHUA UNIV
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Problems solved by technology

[0005] The particle tracking velocimetry method needs to take a large number of photos of bubble positions at transient time points. The time interval between the photos is small, so that the displacement of the corresponding bubbles between the two photos is as small as possible, so as to facilitate the connection of the bubble positions at different time points. Together, the reconstruction of the bubble trajectory is completed. In order to impro

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  • Device for recording air velocity field information and method thereof
  • Device for recording air velocity field information and method thereof
  • Device for recording air velocity field information and method thereof

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[0031] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

[0032] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, eleme...

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Abstract

The invention provides a device for recording air velocity field information and a method thereof. The device comprises a light source system, a bubble generator, a synchronization controller and at least two color cameras. The light source system comprises continuous light sources and pulse light sequence light sources which irradiate according to a preset pulse flashing interval and the pulse color change order. The continuous light sources provide lighting for a test area. The pulse light sequence light sources provide pulse light irradiation for the test area. The bubble generator discharges tracing bubbles of neutral buoyancy to the air of the test area. The color cameras synchronously acquire color images recording the moving tracks of the tracing bubbles. The synchronization controller realizes synchronization of the pulse light sequence light sources and the color cameras, wherein the exposure time of the color cameras is greater than the preset pulse flashing interval of the pulse light sequence light sources. The requirements for the test environment and camera configuration are low so that the accuracy of the measurement result can be guaranteed and the design cost can be reduced.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a device and method for recording air velocity field information based on pulsed light sequences. Background technique [0002] Air flow is a very important way for the diffusion of pollutants and the transmission of heat. The thermal environment and the concentration distribution of pollutants will be significantly different under different air flow forms. Therefore, the grasp of the law of air flow and the measurement of air flow under different conditions have become the basis of research in related fields and are of great significance. [0003] Existing technical means for measuring airflow velocity include particle tracking velocimetry method, releasing tracer particles in the air, using a high-speed camera to continuously record the position information of the bubble point at the transient moment, and then calculating its trajectory and velocity; particle trajectory veloci...

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Application Information

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IPC IPC(8): G01P5/20
CPCY02A90/10
Inventor 李先庭王欢石文星王宝龙邵晓亮
Owner TSINGHUA UNIV
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