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Optical fiber type laser liquid turbidity measuring device and measuring method

A measuring device and turbidity technology, which is applied in the field of fiber optic laser turbidity measuring devices, can solve problems such as failure to work normally, working stability, and measurement volume limitations, and achieve the goals of avoiding electromagnetic interference, improving stability, and measuring accurately Effect

Inactive Publication Date: 2015-04-15
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
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  • Abstract
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Problems solved by technology

[0005] At present, various turbidity measurement systems at home and abroad are difficult to achieve online turbidity measurement in a small space and the test environment is particularly harsh. For example, the ambient temperature exceeds 65 degrees Celsius and cannot work normally. Detectors and signal processing circuits, work stability and measurement volume will be greatly limited

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  • Optical fiber type laser liquid turbidity measuring device and measuring method

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Embodiment Construction

[0037]Such as figure 1 As shown, the measuring device of the present invention includes: a single-chip microcomputer 1, a laser modulation module 2, a laser 3, a first optical fiber 4, a three-port optical fiber circulator 5, an optical fiber collimator 6, a second optical fiber 7, a photoelectric detector 8, a signal amplifier and demodulation module 9; after the laser 3 is modulated by the laser modulation module 2, the laser light is transmitted to the first port of the three-port optical fiber circulator 5 through the first optical fiber 4, and then from the first port of the three-port optical fiber circulator 5 The two ports are output to the fiber collimator 6, and part of the light emitted from the fiber collimator is scattered by the particles in the liquid and returned through the fiber collimator 6 and output to the second fiber from the third port of the three-port fiber circulator 5 7. Then the optical signal is converted into an electrical signal by the photodete...

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Abstract

The invention relates to an optical fiber type laser liquid turbidity measuring device and measuring method. The measuring device comprises a laser, an optical fiber, an optical fiber circulator, an optical fiber collimator, a photoelectric detector and a signal demodulating and processing system. In a measuring system, a full-optical fiber structure of the optical fiber circulator and the optical fiber collimator is adopted, and on the basis of a back scattering light measuring principle, namely, a monotonous relation between the liquid turbidity and the increasing of the scattering light intensity, the accurate on-line measurement for the liquid turbidity under the conditions of long distance and narrow space and other complex conditions is realized. The optical fiber type laser liquid turbidity measuring device has a simple structure, is easy to realize and is high in stability and sensitivity; the practicability and safety of a liquid turbidity measuring system are effectively increased; and a technical support is supplied to the long-term on-line water quality monitoring.

Description

technical field [0001] The invention relates to an optical fiber laser turbidity measuring device and a measuring method, belonging to the technical field of environmental monitoring. Background technique [0002] Liquid turbidity is an optical property of a liquid, which refers to the decrease in the transparency of a water sample due to the scattering of light by solid suspended particles and impurities in the liquid. When the water pollution problem is becoming more and more serious, water quality turbidity is one of the basic indicators reflecting the water quality status. In the process of oilfield exploitation, it is generally necessary to increase oil recovery by means of water injection, but if the injection water contains a large amount of suspended solids, that is, when the turbidity is too high, it will block the percolation end face and percolation channels of the water injection well and hinder oil recovery. . Therefore, accurate monitoring of liquid turbidity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/49
Inventor 桂华侨韩霞程寅王杰赵南京陆亦怀刘建国张玉钧张建王田丽殷高方李德平曹会彬
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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