Method for detecting thermal radiation directivity of urban goal

A detection method and thermal radiation technology, applied in the field of thermal radiation detection, can solve problems such as hindering the research and development of urban thermal environment change laws and restricting quantitative analysis of urban thermal environment.

Inactive Publication Date: 2011-11-09
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

The uncertainty brought about by the directionality of urban target thermal radiation to the inversion of urban surface temperature seriously restricts the quantitative analysis of urban thermal environment, which in turn hinders the research and development of urban thermal environment changes.

Method used

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  • Method for detecting thermal radiation directivity of urban goal
  • Method for detecting thermal radiation directivity of urban goal
  • Method for detecting thermal radiation directivity of urban goal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: computer simulation of thermal radiation directionality of real urban surface

[0041] Survey of typical urban districts

[0042] In order to seek a simplification of urban objectives that is more in line with the real situation of the city, from December 29, 2007 to January 1, 2008, and December 24, 2008, a ground plan for the layout of urban buildings was launched in the urban area of ​​Beijing. investigation. The types of survey areas are divided into four types according to the height and spatial distribution of buildings: 1) Urban CBD area, Guomao Business District in Chaoyang District is selected as the representative area of ​​Beijing urban CBD area. Most of the buildings in this area are high-rise buildings, and the shapes of the buildings are mostly regular geometry, and the distribution is relatively concentrated; 2) The old residential area, the residential area near the east gate of Beijing Normal University is selected as the representative a...

Embodiment 2

[0111] Embodiment 2: computer simulation verification of thermal radiation directionality of physical model of urban area

[0112] Physical Model of Urban Areas

[0113] In order to test and verify the established thermal radiation computer model of urban targets, urban buildings were scaled down to a certain ratio (1:50), and a detection scene simulating a real city was constructed. According to the ground survey results of urban building layout conducted in Beijing in January 2008, the size of the model produced is 0.3×0.2×0.25m, and the spatial layout and relative position relationship between the models can be set according to the actual situation.

[0114] The material of the model adopts the light brick and cement structure commonly used in general buildings. The inside of the model is hollow, so as to be as consistent as possible with the thermodynamic properties of the real building structure. The physical model is placed on an open cement surface testing field, and t...

Embodiment 3

[0146] Example 3: Sensitivity Analysis of Model Parameters

[0147] Due to the fact that in the actual detection of the physical model of the urban target, the spatial position, azimuth angle and zenith angle of the sensor inevitably have errors, which have an impact on the accuracy evaluation of the model. Relatively speaking, the angle parameter of the detection instrument is more difficult to control. Therefore, model parameter sensitivity analysis mainly studies the dependence of model output on sensor detection angle. Sensitivity Analysis of Sensor Positioning Parameters

[0148] In order to analyze the influence of sensor angle positioning parameters—detection azimuth and zenith angle on computer model simulation results, it is necessary to make sure that the other parameters of the model input remain unchanged, and only change the sensor angle parameters to quantitatively analyze its impact on model output Impact. The following analysis scheme can be used: determine ...

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Abstract

The invention discloses a method for detecting thermal radiation directivity of an urban goal. The method comprises the following steps of: acquiring parameters of goal dimension, spatial position relationship, classification and distribution of urban regional components and the like related with the urban regional goal, and establishing a physical model of the urban goal according to the parameters; and meanwhile, developing a computer model of the thermal radiation directivity of the urban goal by means of a Visual Studio 2005 development platform and Open GL three-dimensional modeling language programming, and determining the directional brightness temperature property and the thermal radiation space distribution of an urban region.

Description

technical field [0001] The invention relates to a thermal radiation detection method, in particular to a detection method for thermal radiation directionality of urban targets. Background technique [0002] As an extremely important aspect of urban environmental problems, urban thermal environment is a hot topic in the current research on urban climate and environment. Since Lake Howard pointed out in his book "The Climate of London" in 1818 that the temperature in the city of London was higher than that in the surrounding suburbs, people began to pay attention to the thermal environment of the city. Since then, scholars from various countries have successively observed many cities located in middle and high latitudes and low latitudes, and there is a phenomenon that the temperature in the cities is higher than that in the suburbs. Over the past few decades, rapid urban expansion and other human activities have had a huge impact on urban ecology and climate change. The cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/10G01C11/00G09B29/00
Inventor 陈云浩周纪占文凤马伟
Owner BEIJING NORMAL UNIVERSITY
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