Calculation method, device, radar and system for atmospheric visibility
A technology of atmospheric visibility and calculation method, which is applied in the field of environmental monitoring, can solve the problems of increasing the error rate of visibility value and low matching degree of atmospheric extinction coefficient, and achieve the effect of reducing error rate and improving accuracy
Active Publication Date: 2020-04-07
UNIV OF SCI & TECH OF CHINA
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[0004] However, the atmospheric extinction coefficient used in the visibility calculation formula is the extinction coefficient corresponding to the laser beam with a wavelength of 550nm. light beam, which in turn leads to a low match between the calculated atmospheric extinction coefficient and the existing visibility calculation formula, which increases the error rate of the visibility value
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[0077] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0078] The embodiment of the present invention discloses a calculation method of atmospheric visibility, please refer to the attached figure 1 , the method specifically includes the following steps:
[0079] S101: When receiving the echo signal, use the echo signal to obtain the detection power of the visibility lidar;
[0080] Specifically, in the process of using the visibility lidar to detect the visibility value of the atmosphere, the visibility lidar usu...
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The application provides a method, apparatus, and system for calculating atmospheric visibility and a radar. When an initial atmospheric extinction coefficient is calculated, the initial atmospheric extinction coefficient is corrected by using an angstrom wavelength exponent that is obtained in advance from a sun photometer or a particle spectrometer and is able to reflect a relationship of changing of the atmospheric extinction coefficient with a laser beam wavelength and an initial atmospheric extinction coefficient corresponding to a laser beam of a visibility laser radar with the wavelength deviating from the 550-nm laser beam farther is converter, so that an atmospheric corrected extinction coefficient of the atmospheric extinction coefficient corresponding to a laser beam with an approximate 550-nm wavelength is obtained; and thus when the atmospheric corrected extinction coefficient is introduced into an existing visibility calculation formula to calculate a visibility value ofa detected region, high matching between the visibility calculation formula and the atmospheric corrected extinction coefficient is ensured, so that the error rate of the visibility value is reduced and the accuracy of the visibility value is improved.
Description
technical field [0001] The invention relates to the technical field of environmental monitoring, and more specifically relates to a calculation method, device, radar and system for atmospheric visibility. Background technique [0002] Visibility is an important physical quantity that characterizes the degree of air pollution near the surface. Its magnitude can directly reflect the environmental quality of an area. Therefore, the measurement of atmospheric visibility is closely related to people's daily life. [0003] At present, the commonly used means of measuring atmospheric visibility mainly use visibility measuring instruments to achieve accurate measurement of atmospheric visibility. Among them, visibility laser radar has become a more commonly used visibility measuring instrument due to its characteristics of multiple measurement directions and wide measurement range. A measuring instrument. The process of measuring atmospheric visibility by visibility lidar mainly in...
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IPC IPC(8): G01S17/95G01S7/48
CPCG01S7/4802G01S17/95Y02A90/10
Inventor 夏海云尚祥窦贤康上官明佳王冲裘家伟李蔓一
Owner UNIV OF SCI & TECH OF CHINA