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Particle picture velocity measuring method for accurately measuring construction and city space

A particle image velocity measurement and precise measurement technology, which is applied in the direction of measuring devices, fluid velocity measurement, devices using optical methods, etc., to achieve the effects of high spatial resolution, high measurement accuracy, and fast dynamic response

Inactive Publication Date: 2007-08-22
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional analog mapping system and analytical mapping system can no longer meet the requirements of comprehensive basic spatial information production. The digital photogrammetry system is a new highly automated photogrammetry after the analog mapping system and analytical mapping system. system

Method used

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  • Particle picture velocity measuring method for accurately measuring construction and city space
  • Particle picture velocity measuring method for accurately measuring construction and city space
  • Particle picture velocity measuring method for accurately measuring construction and city space

Examples

Experimental program
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Embodiment Construction

[0025] The present invention relates to a building, urban space and particle image velocimetry (PIV) test, which uses PIV testing technology to accurately measure the building and urban space, so as to effectively design and analyze the entire building and urban space. Image speed measurement method.

[0026] According to the requirements of the experiment, a simulation structure of building and urban space is established. Here, the residential area of ​​Tongji New Village is taken as the experimental object, and it is reduced in a fixed experimental flow field according to the ratio of 1:10;

[0027] As shown in Figure 1, the PIV test system device has a tracer particle emitter 1 (that is, a blower), two pulsed lasers 2 and 3, a high-speed CCD camera 4, an image acquisition card 5, and a control and image processing computer 6 in sequence.

[0028] Turn on the tracer particle emitter 1, which is the blower, and blow tracer particles into the fixed experimental flow field, tha...

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Abstract

The invention discloses a speed measuring method with particle image which can measure architecture and city space accurately. Its steps are: Build a model configuration of architecture and city space and minimize then into a fixed flow field in proportion. Insufflate natural air (tracer particle) into flow field. Utilizing light-source system to lighted measuring area, positions of tracer particles are recorded by image-taking system. Average velocity and image information of all tracer particles are achieved by CCD camera. Arrange the positions, average velocity and image information of tracer particles in simulation experiment, test variation of city wind influenced by architectures in simulated space environment to get specific wind datagram. The invention measures city space accurately by using the speed measuring method with particle image (PIV), which can meet the production requirement of synthetic basic spatial information.

Description

technical field [0001] The present invention relates to a kind of building, urban space and particle image velocimetry namely PIV (Particle Image Velocimetry) test, [0002] Using PIV test technology to accurately measure the building and urban space, so as to effectively design and analyze the entire building and urban space, the particle image velocity measurement method. Background technique [0003] Since the advent of laser velocity measurement technology in 1964, it has been more and more widely used in various measurement fields due to its non-contact measurement, no interference with the flow field, high spatial resolution, fast dynamic response, and high measurement accuracy. Particle image velocimetry (PIV) is a brand-new flow velocity measurement technology developed in the past ten years. Evolved, it integrates computer image processing and optical technology, breaks through the limitations of space single-point measurement technology, and can record the relevan...

Claims

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Application Information

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IPC IPC(8): G01D21/00G01M19/00G01P3/36G01P5/26G01P13/02G01M99/00
Inventor 项秉仁杨丽
Owner TONGJI UNIV
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