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Rainfall measurement method and system based on all-sky imager

An all-sky imager and measurement method technology, used in rainfall/precipitation meters, measuring devices, scientific instruments, etc., can solve the problems of accurate measurement, inability to achieve light rain or drizzle rainfall, etc., and achieve the effect of improving accuracy

Active Publication Date: 2021-01-01
航天新气象科技有限公司
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  • Application Information

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a rainfall measurement method and system based on an all-sky imager, which solves the problem that the precise measurement of rainfall in light rain or drizzle cannot be realized in the prior art

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Embodiment Construction

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. 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.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

[0035]In practical applications, the rain sensor in the meteorological observation business mainly uses the tipping bucket rain gauge for measurement. Its working principle is: rainwater enters the water receiver from the uppermost water receiving port, falls into the water receiving funnel, and flows into th...

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Abstract

The invention discloses a rainfall measurement method and system based on an all-sky imager. The method comprises the following steps: acquiring real-time cloud picture video data acquired by the all-sky imager; converting the cloud picture video data in a current preset time period into a plurality of single-frame image data, and converting each single-frame image data into a gray level image; subtracting two adjacent frames of gray level images to obtain a plurality of difference images; if a change value of each difference image in the current preset time period is greater than a preset threshold, determining a raindrop pixel area according to each difference image in the current preset time period, wherein the raindrop pixel area is an area occupied by the raindrop in the image; and determining a rainfall of the current preset time period according to the raindrop pixel area and a relationship between the preset raindrop pixel area and a raindrop volume. According to the invention,the real-time cloud picture video data is collected through the all-sky imager, the cloud picture video data is converted into the gray level image, the rainfall of the current preset time period isdetermined, and the accuracy of light rain and drizzle measurement is improved.

Description

technical field [0001] The invention relates to the technical field of video data processing, in particular to a method and system for measuring rainfall based on an all-sky imager. Background technique [0002] The methods of obtaining rainfall information usually include surface rain gauge, ground radar estimation and satellite remote sensing inversion. At present, in meteorological, agricultural, hydrological and other meteorological observation operations, rainfall sensors are used to measure rainfall. The existing rainfall sensors mainly use A tipping bucket rain gauge is used for measurement. Its working principle is: rainwater enters the water receiver from the uppermost water receiving port, falls into the water receiving funnel, and flows into the tipping bucket through the funnel mouth. When the accumulated water reaches a certain height (such as 0.01 mm), the tipping bucket loses its balance and overturns. And every time the tipping bucket is dumped, the switch i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/14
CPCG01W1/14Y02A90/10
Inventor 李辉郑峰薛景川周望杨礼艳刘丽莹朱静周乃义丁峥伟
Owner 航天新气象科技有限公司
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