Water gauge marking method and water level detection method

Abstract

The invention discloses a water gauge marking method and a water level detection method. The water gauge marking method comprises the following steps of: marking two E shapes on height area opposite angles of each digit unit in the longitudinal direction of a water gauge, marking two 'lattice' shapes with equal four small areas at opposite angle positions vertically crossed with the diagonal of every two E shapes, and filling the four small areas of the 'field' apes according to 16 different black-white orders to obtain graphs representing digits 0 to 15 respectively. The water level detection method comprises the following steps of: transmitting 'field'-shaped images marked on the water gauge and shot by a CCD camera to a computer through an image acquisition module, and converting the different filling graphs through the computer to obtain 0 to 15 decimal digits so as to determine the current water level. The marking water gauge enlarges the range of water level measurement, improves the measurement precision and is suitable for the water level measurement with irregular fall and large range; and the water level is detected no matter at night or daytime, the identification process is simple, and the methods provide reliable and precise data for a remote water control system and save a large amount of time.

Description

technical field [0001] The invention relates to a water gauge for detecting water level, in particular to a marking method of the water gauge and a method for detecting the water level by the water gauge. Background technique [0002] Water level is one of the indicators of water safety issues, and online detection of water level is an important measure to ensure water safety. At present, water level gauges or water gauges are generally used for water level detection. Water level gauges are greatly affected by water quality in actual use, especially in flood seasons, when the water flow contains more sediment, which is easy to block the water pipes of the water level gauge, forming false water levels, resulting in measurement Inaccurate. The size on the water gauge is marked with Arabic numerals and E-shaped patterns, each E-shaped has 5 equidistant scales, that is, the protruding part of the E-shaped itself has 3 scales, and the blank space in the middle is set as 2 scales...

AI Technical Summary

Problems solved by technology

However, in actual use, the glyph information of the water gauge number is very small, and it is quite difficult to accurately distinguish a certain number, and there are ten kinds of more complicated numbers. The amount of calculation in the recognition process is large, resulting in a low recognition rate.

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