Full-range temperature compensation method of semiconductor gas sensor

A gas sensor and temperature compensation technology, applied in the direction of material resistance, etc., can solve the problems of difficult implementation, heavy database workload, high hardware cost, etc., and achieve the effect of reducing the difficulty of establishment, enhancing applicability, and simple model structure
CN110220945AActive Publication Date: 2019-09-10GOLDCARD HIGH TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GOLDCARD HIGH TECH
Publication Date
2019-09-10

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Abstract

The invention discloses a full-range temperature compensation method of a semiconductor gas sensor, belongs to the technical field of gas sensor detection, and solves the defect that a conventional semiconductor gas sensor cannot be used for gas concentration output. The full-range temperature compensation method comprises the following steps of: S1, acquiring a current environment temperature andthe resistance value of the semiconductor gas sensor in the current use environment, and determining the current normalization coefficient according to the calibration resistance value of the semiconductor gas sensor; S2, searching an upper temperature value and a lower temperature value which are close to the current environment temperature in a pre-established temperature compensation database,and generating a normalization coefficient and gas concentration comparison table under the current environment temperature condition by adopting a linear interpolation method; and S3, searching theupper gas concentration and the lower gas concentration which are close to the current normalization coefficient in the step S1 from the normalization coefficient and gas concentration comparison table generated in the step S2, and performing calculating to obtain the gas concentration under the current environment temperature condition by adopting the linear interpolation method.
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Description

[0001] 【Technical field】

[0002] The invention relates to the technical field of gas sensor detection, in particular to a full-range temperature compensation method for a semiconductor gas sensor.

[0003] 【Background technique】

[0004] The semiconductor gas sensor is made by using the mechanism that the gas is in contact with the semiconductor gas sensor, and the oxidation-reduction reaction occurs on the surface of the semiconductor, resulting in the change of the resistance of the semiconductor gas sensor. People use this to detect the composition of a specific gas or measure the gas concentration. The semiconductor gas sensor is different from the catalytic combustion sensor. Its resistance value is not linearly related to the gas concentration, but with the increase of the gas concentration, it presents a negative power exponential decrease trend, so that the resistance value changes little in the high gas concentration area. Difficult to distinguish exactly. At the sam...

Claims

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