Control device and calibration and control method of oxygen concentration sensor
A technology of oxygen concentration and control device, which is applied in the field of sensors, can solve the problems affecting the detection accuracy, different optimal working temperature, and target temperature value difference, etc., and achieve the effect of improving measurement accuracy
Pending Publication Date: 2021-01-22
VATTI CORP LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
For different zirconia ceramic chips, the optimal working temperature is different, even for the same type of zirconia ceramic chip, there are differences, resulting in differences in the target temperature value achieved when the electronic control module controls its heating. As a result, the zirconia ceramic chip cannot work at the optimal temperature, which affects the detection accuracy
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0022] An embodiment of the present invention is a control device for an oxygen concentration sensor 1, such as figure 2 As shown, it includes an oxygen concentration sensor 1, a controller 2, a power supply 5, an electronic switch 4, a filter module 3 and a signal acquisition module 6; the electronic switch 4 is connected between the input terminal of the filter module 3 and the positive pole of the power supply 5, and its control terminal It is connected with the PWM signal output terminal of the controller 2; the output terminal of the filter module 3 is connected with the H+ of the oxygen concentration sensor 1; the input terminal of the signal acquisition module 6 is connected with the H+, H-, and S- terminals of the oxygen concentration sensor 1 respectively, The output terminal is connected to the controller 2, which is used to realize the sampling of...
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
Login to View More Abstract
The invention discloses a control device and a calibration and control method of an oxygen concentration sensor. By applying the device, the electric power applied to the oxygen concentration sensor at an optimal working temperature is used as an adjustment target value at the normal temperature, and the heating resistance R0 of the oxygen concentration sensor at the optimal working temperature and the pump current IP0 at the normal-temperature atmospheric oxygen concentration are calibrated by adjusting the duty ratio of a PWM signal; after calibration is completed, when the oxygen concentration sensor works normally, the heating resistance R is made to be equal to the calibrated R0 by adjusting the duty ratio of the PWM signal, and in other words, the oxygen concentration sensor works atthe optimal working temperature; by acquiring the pump current IP in real time and calculating the oxygen concentration according to the calibrated IP0, the measurement precision of the oxygen concentration sensor can be improved.
Description
technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a control device, calibration and control method of an oxygen concentration sensor. Background technique [0002] The oxygen concentration sensor is a device used to detect the oxygen content in the air. It can be used to directly measure the oxygen content in the environment, and can also measure the environmental humidity based on the principle that the oxygen content in the air can indirectly reflect the water vapor content. For example, an oxygen concentration sensor with a zirconia ceramic chip as the core component can be used to measure the humidity in the inner cavity of the steam-baking machine. Its working temperature is 400°C to 600°C. The membrane is heated and controlled, and the oxygen concentration value is calculated by measuring the current of the pump, such as figure 1 shown. For different zirconia ceramic chips, the optimal working temperature is...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/409G01N27/406G05D23/20
CPCG01N27/409G01N27/4067G05D23/20
Inventor 罗淦恩刘明雄高宁
Owner VATTI CORP LTD