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A flow rate compensation method and system for a membraneless dissolved oxygen sensor

A technology of dissolved oxygen sensor and compensation method, which is applied in the field of instrument verification, can solve problems such as drift, and achieve the effects of eliminating drift and improving accuracy and stability

Active Publication Date: 2022-06-28
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the technical problem of the drift of the membraneless electrochemical dissolved oxygen sensor due to the influence of the flow velocity, and propose a method for measuring dissolved oxygen that compensates the influence of the flow velocity

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  • A flow rate compensation method and system for a membraneless dissolved oxygen sensor
  • A flow rate compensation method and system for a membraneless dissolved oxygen sensor
  • A flow rate compensation method and system for a membraneless dissolved oxygen sensor

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Embodiment Construction

[0061] When the inventor was conducting research on a new type of film-free dissolved oxygen sensor, he found that because the film-free sensor has the characteristics of short measurement time and fast response, it can be considered that the surrounding oxygen is hardly consumed. Therefore, we can think that in the actual measurement process, the transient current of the electrode is only composed of local diffusion current and convective current, and due to the existence of micropores, the influence of convection on the diffusion distribution is ignored. In this way, the contribution of diffusion current and convective current to the total measured current can be calculated theoretically separately, and then drift compensation can be realized.

[0062] The comparison between the diffusion current and the convective current refers to the description in Equation 6 and Equation 7, because the electrode consumes the dissolved oxygen near the electrode during the measurement proce...

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Abstract

The present invention proposes a flow rate compensation method and system for a filmless dissolved oxygen sensor. The present invention ignores the influence of convection on the diffusion distribution, and collects the current with different waiting times during a measurement process. Calculates the contribution of diffusive and convective currents to the total measured current, enabling flow velocity compensation.

Description

technical field [0001] The invention relates to the technical field of instrument verification, and in particular to a flow rate compensation method and system for a membraneless dissolved oxygen sensor used for measuring the dissolved oxygen concentration in flowing seawater. Background technique [0002] Ocean dissolved oxygen concentration is one of the key indicators for studying marine ecology and biogeochemistry. In a liquid environment, oxygen molecules are involved in a variety of biological, chemical and physiological processes. These processes can be studied and quantified by measuring the concentration of dissolved oxygen, which in turn can detect the oceanic impacts of global warming on ocean biogeochemistry and circulation, the formation and increase of biological organisms in seawater, and estimates of processes such as ocean uptake of carbon dioxide. [0003] At present, there are two main ways to monitor dissolved oxygen in the ocean. One is an optical diss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416
CPCG01N27/4163
Inventor 向颖聪黄希崔莉
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI