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

Temperature compensation method and system based on NDIR gas sensor and computer readable storage medium

A gas sensor and temperature compensation technology, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems affecting the measurement accuracy of NDIR gas sensors and the influence of infrared light sources, so as to improve the measurement accuracy and efficiency, wide application range, and compensation high precision effect

Active Publication Date: 2022-02-22
HANGZHOU CHUNLAI TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, changes in the external ambient temperature will not only affect the infrared light source, but also affect the gas chamber and infrared detector to varying degrees, thereby affecting the measurement accuracy of the NDIR gas 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
  • Temperature compensation method and system based on NDIR gas sensor and computer readable storage medium
  • Temperature compensation method and system based on NDIR gas sensor and computer readable storage medium
  • Temperature compensation method and system based on NDIR gas sensor and computer readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The NDIR gas sensor includes an infrared light source, a gas chamber and an infrared detector. The light emitted by the infrared light source passes through the measured gas in the gas chamber, and then reaches the infrared detector after passing through the filter. The working principle of the NDIR gas sensor is based on the selective absorption characteristics of near-infrared spectra of different gas molecules, and uses the relationship between gas concentration and absorption intensity (Lambert-Beer law) to identify gas components and determine their concentrations.

[0053] In this embodiment, a thermistor is arranged at a suitable position of the infrared light source, the gas chamber and the infrared detector, and the temperature of the infrared light source, the gas chamber and the infrared detector is measured through the thermistor.

[0054] In addition, this example uses methane (CH 4 ) gas detection as an example to describe in detail.

[0055] Such as fig...

Embodiment 2

[0128] The temperature compensation method based on the NDIR gas sensor of this embodiment differs from that of Embodiment 1 in that:

[0129] The fitting of the standard compensation curve is not limited to the quaternary polynomial fitting defined in Embodiment 1, and cubic polynomial fitting, quintic polynomial fitting, and sixth-degree polynomial fitting can also be selected, which can be determined according to actual application requirements. .

[0130] Correspondingly, the fitting module in the temperature compensation system based on the NDIR gas sensor of this embodiment is adjusted accordingly;

[0131] In the computer-readable storage medium of this embodiment, instructions are stored in the computer-readable storage medium, and when the instructions are run on a computer, the computer is made to execute the temperature compensation method of this embodiment to realize intelligent temperature compensation.

[0132] For other steps of the temperature compensation me...

Embodiment 3

[0134] The temperature compensation method based on the NDIR gas sensor of this embodiment differs from that of Embodiment 1 in that:

[0135] The selection of the number of range points is not limited to the four range points defined in Embodiment 1, and the concentration value of the range points is not limited to the concentration value defined in Embodiment 1, which can be adjusted according to actual application requirements.

[0136] Correspondingly, the corresponding modules in the temperature compensation system based on the NDIR gas sensor of this embodiment are adjusted accordingly;

[0137] In the computer-readable storage medium of this embodiment, instructions are stored in the computer-readable storage medium, and when the instructions are run on a computer, the computer is made to execute the temperature compensation method of this embodiment to realize intelligent temperature compensation.

[0138] For other steps of the temperature compensation method and othe...

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 relates to a temperature compensation method and system based on an NDIR gas sensor and a computer readable storage medium. The method comprises the following steps: S1 setting a reference environment temperature and a plurality of different standard environment temperatures; S2 calculating a resistance coefficient corresponding to each standard environment temperature and a light intensity compensation coefficient corresponding to the standard gas of each measuring range point; S3 performing polynomial fitting on the light intensity compensation coefficient and the resistance coefficient corresponding to the standard gas of each measuring range point to obtain a standard compensation curve of the standard gas of each measuring range point; S4 calculating a light intensity compensation correction coefficient; and S5 correcting a wave crest and wave trough difference value of the measurement spectrum output in real time by using the light intensity compensation correction coefficient to obtain a corrected light intensity signal, and calculating according to the corrected light intensity signal to obtain a gas concentration value. According to the invention, the influence of the external environment temperature change on an infrared light source, a gas chamber and an infrared detector is comprehensively considered, the light intensity signal is directly compensated, and the measurement precision and efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of gas analysis and detection, and in particular relates to a temperature compensation method, system and computer-readable storage medium based on an NDIR gas sensor. Background technique [0002] Non-dispersive infrared (NDIR) gas sensors, one of the most closely related commercial sensors to optical gas sensors, can be used to assess vehicle exhaust, air quality, and detect gas leaks. NDIR gas sensor is mainly composed of infrared light source, gas chamber, infrared detector and other parts, which is mainly based on the Lambert-Beer law of infrared absorption by gas as the theoretical basis. [0003] However, NDIR gas sensors are prone to temperature drift during outdoor detection. This is mainly because the infrared light source, infrared detector, and gas chamber are affected by changes in the external environment temperature, resulting in inaccurate measurement data, resulting in linearity deterioratio...

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
IPC IPC(8): G01N21/3504G01N21/01
CPCG01N21/3504G01N21/01
Inventor 盛润坤李政隆项金冬郭杰于志伟
Owner HANGZHOU CHUNLAI TECH