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Large scale particle picture velocimetry based on Haokong surface flow field computational algorithm

A technology for particle image velocity measurement and flow field calculation, which is applied in fluid velocity measurement, velocity/acceleration/impact measurement, measurement devices, etc. , easy to carry

Inactive Publication Date: 2014-12-17
NANJING HAWKSOFT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the disadvantages of low precision in the prior art, the present invention provides a large-scale particle image velocity measurement method based on the Haokong surface flow field calculation algorithm

Method used

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  • Large scale particle picture velocimetry based on Haokong surface flow field computational algorithm
  • Large scale particle picture velocimetry based on Haokong surface flow field computational algorithm

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Embodiment 1

[0035] The large-scale particle image velocity measurement method based on Haokong surface flow field calculation algorithm includes the following steps:

[0036] Step 1: Connect the calibration component, camera component, control component, storage component and power supply component in the data acquisition device. The connection method is that the camera component is connected to the control component through a signal line, and the camera component is connected to the storage component through a data line. The camera component, control component, and storage component are connected to the power supply component through the power cord, and the object to be measured is detected after the data acquisition device is connected;

[0037] Step 2: Collect data on the object to be measured, and the acquisition method adopts calibration method and measurement method: the calibration method refers to: the data acquisition device is fixed according to the calibration strategy, and the ...

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Abstract

The invention discloses a large scale particle picture velocimetry based on a Haokong surface flow field computational algorithm, which overcomes limitation of the existing large scale velocimetry, can achieve coverage of more than 20m*20m by a single lens under the premise of ensuring precision, and can be convenient to install and measure; complexity of adding a manual tracer in the traditional velocimetry is overcome; accurate flow field data can be measured under the premise of not adding the manual tracer; limitation of a traditional PIV algorithm is overcome; algorithm software includes flow state automatic identification technology, anti-counterfeiting flow algorithm, image automatic correction technology and the like; high precision and high fineness of the measured result are ensured. Meanwhile, the hardware device adopted by the invention is deft in design and convenient to carry, and thereby operating processes are simple, convenient and easy to implement.

Description

technical field [0001] The invention relates to an image velocity measurement method, in particular to a large-scale particle image velocity measurement method based on the Haokong surface flow field calculation algorithm. Background technique [0002] Large-scale surface flow field velocity measurement technology, based on the derivative system of traditional PIV technology, extends the traditional small-scale flow field measurement to the measurement of large-scale surface two-dimensional flow field. During the measurement process, natural light is used for lighting, and the on-site natural water body mode (such as water surface ripples, large-scale vortex structure, non-uniform distribution of sediment concentration, floating impurities, etc.) Through image preprocessing techniques such as distortion correction and forward projection, the image is converted into an image in real coordinates, and the two-dimensional surface flow field is calculated by processing the flow m...

Claims

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Application Information

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IPC IPC(8): G01P5/26
Inventor 廖谦阮哲伟
Owner NANJING HAWKSOFT TECH
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