Sediment content reflective measuring method and sediment content reflective measuring device

Abstract

The invention relates to a sediment content reflective measuring method and a sediment content reflective measuring device. The sediment content reflective measuring method includes the following steps of firstly, setting a sediment content measuring device comprising a near-infrared sensor, a single-chip microcomputer, a power source driving circuit, an amplifying circuit and a data acquirer; secondly, calibrating sediment content of sediment carrying flow to be measured and building a calibration model before measuring; and thirdly, disposing the near-infrared sensor into the sediment carrying flow to be measured, repeating the above steps to acquire optical signals reflected by sediment and voltage signal intensity value of reflecting light, and calculating the sediment content of the sediment carrying flow to be measured according to the calibration model, wherein the near-infrared sensor comprises light source, a photoelectric detector and a glass plate. The sediment content reflective measuring method and the sediment content reflective measuring device can be widely applied to areas with serious water losses and soil erosion and particularly applicable to measuring sediment carrying flow high in sediment content.

Description

technical field [0001] The invention relates to a sand concentration measuring method and a measuring device, in particular to a reflective sand concentration measuring method and a measuring device suitable for high sand concentration. Background technique [0002] my country is one of the countries with serious water and soil erosion. The prominent problem is the high sediment concentration of rivers, such as the Yellow River Basin. According to the "China River Sediment Bulletin", the annual average output measured by important hydrological stations in the lower reaches of the Yellow River from 1950 to 2005 The amount of sand is about 900 million tons, and the average annual sand concentration is 25kg / m 3 Left and right, local river sections can reach hundreds or even thousands of kilograms per cubic meter. The measurement of sediment concentration is an important part of the automatic soil erosion monitoring system. How to measure the sediment concentration quickly, accu...

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Problems solved by technology

Under normal circumstances, the sand concentration that can be measured by the infrared sand detector is also 50kg / m 3 Below, it is greatly affected by sediment composition, etc., so it is not suitable for the measurement of high sediment content

Due to the serious soil erosion in my country and the high sediment content of slopes and rivers, the application of infrared sand measuring instruments is limited.

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