Optical dissolved oxygen sensor

A dissolved oxygen sensor and dissolved oxygen technology, applied in the field of sensor measurement, can solve the problems of inability to realize real-time online monitoring, inconvenient portability, high price, etc., and achieve the effect of improving waterproofness and reliability, avoiding interference, and realizing online detection

Active Publication Date: 2011-11-23
CHINA AGRI UNIV
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Problems solved by technology

[0003] In recent years, optical fiber oxygen measurement devices based on fluorescence quenching technology and optical fiber technology can be used for on-site detection of dissolved oxygen in water, but such devices require expensive silica optical fibers for light transmission, and the optical fibers are easy to break and inconvenient to carry
There

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  • Optical dissolved oxygen sensor
  • Optical dissolved oxygen sensor
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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] Such as figure 1 As shown, the optical dissolved oxygen sensor of the present embodiment includes: a fluorescence measurement module 2, which is used to collect the dissolved oxygen signal of the water body; a temperature measurement module 1, which is used to collect the temperature signal of the water body; TEDS (Transducer Electronic Data Sheet, sensor electronic data Table) memory 5, used to store TEDS parameters, TEDS parameters include channel information conforming to IEEE1451.2 standards and calibration compensation parameters reflecting the relationship between temperature and dissolved oxygen; signal conditioning module 3, connected to fluorescence measure...

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Abstract

The invention relates to the technical field of measurement of sensors and in particular discloses an optical dissolved oxygen sensor. The optical dissolved oxygen sensor comprises a fluorescence measurement module for acquiring a dissolved oxygen signal of a water body, a temperature measurement module for acquiring a temperature signal of the water body, a transducer electronic data sheet (TEDS) storage device for storing TEDS parameters which include a calibration compensation parameter reflecting the relation between temperature and dissolved oxygen, and a micro-processor connected with the fluorescence measurement module, the temperature measurement module and the TEDS storage device for performing analog-digital conversion processing on a dissolved oxygen voltage signal and a temperature voltage signal and generating a dissolved oxygen value by calculation processing according to the calibration compensation parameter. The optical dissolved oxygen sensor can realize temperature compensation of the measured dissolved oxygen, improve the measurement precision of the dissolved oxygen and realize on-line detection of the dissolved oxygen of water quality.

Description

technical field [0001] The invention relates to the technical field of sensor measurement, in particular to an optical dissolved oxygen sensor. Background technique [0002] Dissolved oxygen refers to oxygen dissolved in the molecular state of water, which is an indispensable condition for the survival of aquatic organisms. The dissolved oxygen in natural water is close to the saturation value (9ppm), and when the algae multiply vigorously, the dissolved oxygen content decreases. Water bodies polluted by organic matter and reducing substances can reduce dissolved oxygen. For aquaculture, water body dissolved oxygen has a vital impact on the survival of aquatic organisms such as fish. When dissolved oxygen is lower than 4mg / L, it will It will cause fish to suffocate and die. For humans, the dissolved oxygen content in healthy drinking water should not be less than 6mg / L. When the dissolved oxygen consumption rate is greater than the rate at which oxygen dissolves into the w...

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Application Information

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IPC IPC(8): G01N21/64
Inventor 李道亮台海江刘双印丁启胜马道坤
Owner CHINA AGRI UNIV
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