Mist zone visibility detection method and equipment

A detection method and detection equipment technology, applied in the field of environmental information monitoring, can solve problems such as complex operation, high cost, and low detection accuracy, and achieve the effects of improved resolution, low cost, and high degree of automation

Inactive Publication Date: 2011-03-30
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

[0012] The invention provides a fog area visibility detection method and its equipment, which mainly solves the problems of low detection accuracy, high cost and complicated operation of the existing fog area visibility detection method and its equipment

Method used

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  • Mist zone visibility detection method and equipment
  • Mist zone visibility detection method and equipment
  • Mist zone visibility detection method and equipment

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Embodiment Construction

[0040] The invention combines the optical characteristics of fog and adopts the principle that fog has a scattering effect on laser light. The following combination figure 1 , figure 2 The present invention is described in detail.

[0041] The visibility of fog can be converted by measuring the fog air extinction coefficient. According to Koschmieder's principle, for a black body target with the horizontal sky as the background, set the visibility range V m Satisfies the following empirical relationship with the fog extinction coefficient σ

[0042] V m = 3.912 σ ( λ 0.55 ) - q

[0043] In the formula, λ is the wavelength of light, and q is a coefficient related to visibility and sight distance. Therefore, the visibility can be calibrated by measuring the fog extinctio...

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Abstract

The invention discloses a mist zone visibility detection method and mist zone visibility detection equipment. By measuring scattering strength of mist on light, an extinction coefficient is acquired and a visibility value is finally acquired. Laser is adopted as a detection light source, and a photoelectric detector is used for receiving the light. Mist with different visibility values brings different scattering receiving results; when the visibility is high, light scattering is low and an output value on the photoelectric detector is low; and when the mist visibility is low, a receiving value of the photoelectric detector is increased. By analyzing and calculating scattered light receiving data, the mist visibility value is acquired, and through multipoint arranged photoelectric receivers and the correction of environmental temperature and humidity, the measurement accuracy can be effectively improved. A wireless communication module is arranged inside an instrument, and remote signal transmission can be realized. The instrument is convenient to use, overcomes the defect that the conventional related products have high cost, and is convenient to monitor environment in foggy weather.

Description

technical field [0001] The invention relates to an environmental information monitoring method and equipment thereof, in particular to a method and equipment for detecting visibility in foggy areas. Background technique [0002] Fog is a weather phenomenon in which the moisture in the atmosphere reaches saturation, condenses into small crystal droplets, and floats near the ground. The influence of fog can be expressed by the relationship between visibility and line-of-sight. Visibility refers to the visible distance of the target. It refers to the maximum distance at which the outline of the target can be distinguished from the background when observing the target. It is a function of the contrast between the object and the background. When the air is filled with tiny water particles, they scatter light, severely affecting line-of-sight clarity and reducing visibility. [0003] The reduction of visibility has a great impact on human traffic activities. Since the fog will ...

Claims

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Application Information

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IPC IPC(8): G01N21/49
Inventor 阮驰刘志麟
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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