Unlock instant, AI-driven research and patent intelligence for your innovation.

Optimizing Method of Polarization Parameters of Two-electrode Clark Type Micro Dissolved Oxygen Sensor

A dissolved oxygen sensor and polarization parameter technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of poor detection accuracy and stability of dissolved oxygen, and achieve the effect of improving detection accuracy and stability

Active Publication Date: 2020-07-24
BEIJING UNIV OF CHEM TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor detection accuracy and poor stability of trace (PPB level) dissolved oxygen, the purpose of the present invention is to provide a method for optimizing the polarization parameters of trace (PPB level) dissolved oxygen sensor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optimizing Method of Polarization Parameters of Two-electrode Clark Type Micro Dissolved Oxygen Sensor
  • Optimizing Method of Polarization Parameters of Two-electrode Clark Type Micro Dissolved Oxygen Sensor
  • Optimizing Method of Polarization Parameters of Two-electrode Clark Type Micro Dissolved Oxygen Sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Establish the functional relationship between the polarization potential E(t, t') and the polarization reaction time t and the time t' when the dissolved oxygen concentration on both sides of the oxygen permeable membrane reaches equilibrium;

[0048]

[0049] According to formula (1), in the chemical reaction, each particle in the electrolyte participates in the reaction and consumes water molecules at the same time, so the concentration of each particle changes continuously with the increase of electrolysis time t.

[0050] From the formula (1), the sensor is in the same detection environment, and the size of the polarization potential E changes with the increase of the sensor energization time t, at this time is a constant value;

[0051] In different detection environments of the sensor, the size of the polarization potential also changes with the increase of the electrolysis time t, but in the process of environment conversion, The value of will change with t...

Embodiment 2

[0060] Establish the reduction reaction rate of the trace dissolved oxygen sensor and the ratio relational expression of the oxidation reaction rate, as follows:

[0061]

[0062] In formula (2), there are:

[0063]

[0064] According to formula (3), it can be seen that the oxidation reaction rate of the anode is related to the content of silver in the anode c Ag It is related, that is, the oxidation reaction rate of the anode is related to the surface area of ​​the anode in contact with the electrolyte, and the relationship is nonlinear. Therefore, when the mathematical relationship in formula (2) is not equal to 1, the sensor is unstable, and it is necessary to change the effective surface area of ​​the two electrodes in contact with the electrolyte to adjust the reaction rate of the cathode and the anode, so that the mathematical relationship is equal to 1 , to ensure the balance of the ion flow, so that a stable output current can be detected in the detection of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for optimizing polarization parameters of a two-electrode Clark type trace dissolved oxygen sensor. The method includes a negative electrode, positive electrode and polarization parameter optimizing method. A function relationship between a polarization potential E with sensor working time t and time t' when the concentrations of dissolved oxygen on two sides of anoxygen permeation membrane reach a balance is built, and the the trace dissolved oxygen sensor is determined to have a stable working time interval; a mathematic relationship between the respective reaction rates of the negative electrode and the positive electrode of the sensor is built, and a best effective surface area for the contact between the positive electrode and electrolyte is determined; and under the best effective surface area, the two-electrode Clark type trace dissolved oxygen sensor has highest detection accuracy. According to the technical scheme provided by the invention, a stable working time interval of the trace dissolved oxygen sensor is determined, and the two-electrode Clark type trace dissolved oxygen sensor has relatively high stability and accuracy in the workingtime interval. Meanwhile, the detection accuracy of the trace dissolved oxygen sensor is improved.

Description

technical field [0001] The invention belongs to the detection field of a two-electrode Clark type trace dissolved oxygen sensor, and more specifically relates to a method for optimizing the polarization parameters of a two-electrode Clark type trace dissolved oxygen sensor. Background technique [0002] The molecular oxygen in the air dissolved in water is called dissolved oxygen (DO). Dissolved oxygen is the embodiment of the self-purification ability of water body and one of the comprehensive indicators to measure water quality. A dissolved oxygen sensor is a sensing device used to measure the oxygen content in water. [0003] In industrial production, the dissolved oxygen in boiler feed water and condensate water has great activity, and it is very easy to chemically react with the furnace wall made of iron to form rust. Rust easily causes uneven thickness of the furnace wall, resulting in insufficient force. If the situation is serious, it will cause the explosion of the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416G01N27/409G01N27/419
CPCG01N27/409G01N27/4163G01N27/419
Inventor 陈娟刘翔宇
Owner BEIJING UNIV OF CHEM TECH