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Self-calibrating atmosphere visibility measuring method and measuring system thereof

A technology of atmospheric visibility and measurement system, which is applied in the field of atmospheric visibility measurement and can solve problems such as unseen

Inactive Publication Date: 2006-07-19
成都易航信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, domestic research on highway visibility mainly focuses on the influence of various climatic conditions on visibility and the influence of environmental pollution on visibility. There is no report on the real-time detection system of atmospheric visibility for characteristic evaluation, and there is no report on the mature and practical real-time detection system of atmospheric visibility with self-calibration

Method used

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  • Self-calibrating atmosphere visibility measuring method and measuring system thereof
  • Self-calibrating atmosphere visibility measuring method and measuring system thereof
  • Self-calibrating atmosphere visibility measuring method and measuring system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] (1) On-site climate: medium fog

[0097] (2) Targets and parameters:

[0098] Such as Figure 6a , the special target for visibility measurement used in this embodiment includes a target rod 1 and a base plate 2, the base plate 2 is fixed on the top of the target rod 1, the target rod 1 is fixed on the ground foundation support, and the base plate 2 is equally divided into four blocks, wherein The two diagonal blocks are black diffuse reflective surfaces 3 , and the other two diagonal blocks are white diffuse reflective surfaces 4 . The shape of the bottom plate 2 is a square, and the four blocks are squares of equal size, and the blocks of the same color are distributed diagonally.

[0099] The engineering installation parameters of the target can be based on the basic parameters (that is, the total number of targets, the site of use (highway or airport), the distance range of the installation, the CCD size of the camera used, the total pixels, the maximum focal leng...

Embodiment 2

[0124] (1) On-site climate: heavy fog

[0125] (2) target and parameter: with embodiment 1

[0126] (3) measuring system and measuring method are the same as embodiment 1

[0127] (4) Measurement results: (another example on 2005-11-27 at 25km of Chengya Expressway)

[0128]

[0129]In the above table, the target distance of the value of normalized contrast Cn=0.05 is 150m, that is, the visibility measurement result is 150m, and the visual inspection result of normal-sighted persons is about 160m, which is consistent with the measurement result of the present invention.

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Abstract

The invention discloses a method and system for measuring the self-aligning atmosphere visual degree. It takes photo of the image of all the target and uses the mode near to human eyes character to process the image to auto compute the normalizing diversity of the target light brightness and the visual degree value and transmits the data to the monitoring center and the LED large screen display of the high speed road inlet and outlet port by GPRS wireless mode.

Description

technical field [0001] The invention relates to an atmospheric visibility measurement method and system, in particular to a self-calibration atmospheric visibility measurement method and system. technical background [0002] With the rapid development of my country's national economy, road traffic, especially expressway traffic, has developed rapidly, the number of motor vehicles has also increased rapidly, and inter-regional exchanges have become more frequent. widespread concern in society. Visibility is an important factor that directly affects highway traffic safety. Poor visibility and weather conditions often lead to large-scale serial traffic accidents, causing heavy casualties and property losses. Therefore, it is very important for drivers, passengers and traffic management departments to quickly and accurately measure and report visibility. [0003] As early as 50 years ago, the research and development of visibility measurement technology and instruments began in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/47G01N21/17G01W1/00
Inventor 谢兴尧万海峰张速
Owner 成都易航信息科技有限公司
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