Device, system and method for all-weather monitoring of visibility in river section of Yangtze River mountainous area

Abstract

The invention provides a system for monitoring visibility of channel segments of the Yangtze River in a mountainous area in an all-weather manner. The system comprises a mode switching unit used for switching a day or night according to a judgment result and a current time point of a control circuit, an image visibility comparing standard calibrating unit, a picture data processing unit, a target region identifying unit, a target region luminance contrast characteristic value extracting unit, a visibility calculating unit and an evaluating unit. The system is capable of realizing that the visibility is monitored in real time in an all-weather manner and automatically switching two monitoring modes of the day and the night, can be directly arranged on a beacon vessel so that the mist situation is relatively immediately monitored to approach the navigation condition of the beacon vessel in a channel; measured data is relatively accurate and is relatively of a practical significance; the whole set of equipment is relatively low in cost; the erecting density can be increased, the monitoring range is enlarged, and more visibility information is obtained so that the mist channel of the channel is monitored being relatively close to a scene.

Description

technical field

[0001] The invention belongs to the field of monitoring, and in particular relates to a system and method for all-weather monitoring of the visibility of river sections in mountainous areas of the Yangtze River. Background technique

[0002] In the mountainous channel of the Yangtze River, affected by the water body and special terrain environment, the river surface is often filled with dense fog. The most common is radiation fog, the most harmful is group fog, and a small amount of advection fog. Fog cells are relatively small, with a general range of tens of meters to hundreds of meters. Outside the fog, the sightlines are good, but within the fog, the visibility is extremely low. Due to the localized and sudden nature of the cloud fog, the crew will be caught off guard, which will easily cause major traffic accidents and pose a serious threat to the ship. Therefore, it is very important for the safety of navigation to deploy high-density visibility instr...

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