Sediment content reflective measuring method and sediment content reflective measuring device

A technology of measuring device and measuring method, applied in the direction of measuring device, suspension and porous material analysis, particle suspension analysis, etc. It can solve the problem of high volume and achieve the effect of fast response time, small size and long life.

Inactive Publication Date: 2012-08-01
CHINA AGRI UNIV
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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

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  • Sediment content reflective measuring method and sediment content reflective measuring device
  • Sediment content reflective measuring method and sediment content reflective measuring device
  • Sediment content reflective measuring method and sediment content reflective measuring device

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Sand-laden water is a solid-liquid two-phase fluid composed of sediment and water. When light is irradiated in sand-laden water, part of the light is transmitted through the sand-laden water, part is absorbed by the water flow and sediment, and part is reflected by the water flow and sediment. In the case of low sand content in the sandy water flow, most of the light is transmitted through the sandy water flow, and only a small part is reflected by the water flow and sediment. As the sand concentration continues to increase, the reflection of the sand to light increases, and more light is reflected by the sand. Therefore, as long as the intensity of the light signal reflected by the sand can be measured, and the relationship between the light signal intensity and the content of different water flows can be established Calibration model of sand ...

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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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Application Information

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IPC IPC(8): G01N15/06
Inventor 雷廷武张宜清赵军殷哲
Owner CHINA AGRI UNIV
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