System and method for measuring water level based on image vision

A technology of water level measurement and image vision, applied in the direction of buoy liquid level indicator, etc., can solve the problem of high cost, achieve the effect of low cost, small environmental impact and strong adaptability

Inactive Publication Date: 2010-06-02
HOHAI UNIV CHANGZHOU
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  • System and method for measuring water level based on image vision
  • System and method for measuring water level based on image vision
  • System and method for measuring water level based on image vision

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[0016] Such as figure 1 , The water level measurement system includes six parts: float device 1, CCD camera 2, video A / D acquisition module 3, external LCD display module 4, FPGA processing module 5 and expansion communication module 6. The float device 1 is mainly used for physical calibration of the water level. The CCD camera 2 and the video A / D acquisition module 3 are mainly used for collecting images and converting them into digital images that are convenient for digital equipment processing. The CCD camera 2 is arranged directly above the float device 1. Its output is connected to the video A / D acquisition module 3 . FPGA processing module 5 is the field programmable gate array core processing module, which mainly realizes functions such as image acquisition, edge extraction, and distance measurement, and connects the output of video A / D acquisition module 3 to FPGA processing module 5, and the output of FPGA processing module 5 The output is respectively connected to ...

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Abstract

The invention discloses a system and a method for measuring water level based on image vision, which is used for measuring large measuring range water level of places of reservoirs, hydropower station and the like. A CCD camera is arranged right above a floater device for acquiring videos; the videos are converted into digital image frames through a video A/D acquisition module; a floater image area in a dynamic image is influenced by distance changing between the floater and the CCD camera, wherein the distance changing between the floater and the CCD camera is caused by water level changing; the acquired floater image area in the videos is computed through an FPGA processing module, and a relative distance between the floater and the CCD camera is obtained for measuring the water level. In the invention, the water level can be measured indirectly through the floater area in the videos measured by the image vision technology without an expensive water level sensor, and the cost is low; by adopting a modularized design method, the invention has the advantages of simple installation, convenience for on-site measurement and system maintenance, and high adaptability.

Description

technical field [0001] The invention belongs to the field of electronic measurement, uses image visual processing technology to realize water level measurement, and can be used for large-range water level measurement in reservoirs, hydropower stations and other places. Background technique [0002] In view of the uneven distribution of water in various regions, the complexity of flood disasters, and the deterioration of the water body environment, it is necessary to optimize the allocation of water resources to achieve sustainable use of water resources. Therefore, it is necessary to master the basic information of water resources. The optimal allocation and scientific management of water resources have lost their foundation. In terms of water level measurement, self-recording water level gauges are widely used in the world. According to the principle of sensing water level, they can be divided into float type water level gauge, pressure type water level gauge, gas medium or...

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Application Information

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IPC IPC(8): G01F23/64
Inventor 奚吉梁瑞宇张卓张学武丁燕琼顾灏钱萧诚孙浩顾丽萍
Owner HOHAI UNIV CHANGZHOU
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