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Method and device for measuring sediment content suspending in water

A technology of sediment content and measuring device, which is applied in the direction of measuring device, scattering characteristic measurement, particle suspension analysis, etc., can solve the error of suspended sediment particle size measurement results, the detection error of high-concentration suspended sediment is large, and the detection concentration range is small. and other problems, to achieve the effect of improving the concentration detection range, low power consumption and low cost

Inactive Publication Date: 2008-08-20
FUZHOU UNIV
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Problems solved by technology

These methods have their own advantages and disadvantages, but they all have defects such as small detection concentration range and large detection error of high-concentration suspended sediment, and are easily affected by other suspended substances such as planktonic algae and colored matter, and uneven suspended sediment. Particle size will also bring a large error to the measurement results
Most of the current suspended sediment detection instruments are for point measurement, and there is a large deviation between the measurement data and the actual sediment concentration in the entire measurement water area

Method used

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  • Method and device for measuring sediment content suspending in water
  • Method and device for measuring sediment content suspending in water
  • Method and device for measuring sediment content suspending in water

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Embodiment Construction

[0016] Refer to attached figure 1 , figure 2 , image 3 :

[0017] The present invention 1) replaces the traditional excitation light source with an infrared light-emitting diode (emission wavelength of 860 nm) excitation light source with low power consumption and good stability, and uses a silicon photovoltaic cell with good photocurrent linearity, fast response time, and small volume as the optical signal receiver.

[0018] 2) Infrared light-emitting diodes emit infrared light into the water body, silicon photocell light signal detectors from different angles of 30 degrees and 165 degrees [such as Figure 7 As shown, vertex A is the midpoint of the maximum optical path (that is, when the concentration is close to zero, the maximum distance that the near-infrared light can penetrate the turbid liquid); vertex B is the midpoint of the vertical distance from the silicon photocell to the LED] Accept Signal scattered by suspended sediment.

[0019] 3) Use the front-end ampl...

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Abstract

The aim of the invention is to provide a method for measuring the content of the suspending mud in the water body and the measuring device thereof, the method for measuring the content of the suspending mud in the water body comprises the following steps: 1) transmitting infrared light into the suspending mud water body with infrared light emitting diode as excitation light source, and arranging a plurality of silicon photocells at the front and side of the infrared light emitting diode for respectively receiving the light signal scattered by the suspending mud; 2) adopting a front-end amplifying circuit for executing signal amplifying to the light signal; 3) converting the analogue signal to digital signal with the AD collecting circuit; 4) outputting the testing data by the control part of the single-chip. In the invention by receiving the scattered signal through a plurality of silicon photocells from different positions the concentration detecting range of the suspending mud is increased; the floating alga, the colored matter and the like transparent or semitransparent suspending substance and mud with bigger grain diameter hardly affect the measurement result.

Description

Technical field: [0001] The invention relates to a measurement method and a measurement device for suspended sediment content in various water environments, especially in seawater. Background technique: [0002] The determination of suspended sediment content is one of the important indicators in water quality monitoring. The measurement and estimation of suspended sediment concentration is the study of sediment discharge into the sea and the dynamics of marine sedimentation. It is related to the sedimentation or change of channel ports, the shaping of estuary beaches, and the development of nearshore aquaculture. my country's coastal and offshore waters are characterized by high suspended sand, and their measurement methods include traditional weighing and specific gravity methods. They all have the disadvantages of poor sampling representativeness, troublesome sampling and low efficiency, and cannot be monitored in real time and continuously. Existing suspended sediment m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06G01N21/53
Inventor 陈曦黄大朋邱彬陈国南
Owner FUZHOU UNIV
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