Temperature measurement method based on absorption spectrum

A technology of temperature measurement and absorption spectrum, which is applied in the direction of physical/chemical change thermometers, thermometers, heat measurement, etc., can solve the problems of complex measurement sensors, achieve high measurement accuracy, fast temperature measurement, and simple structure.

Pending Publication Date: 2022-07-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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This structure also leads to a slightly complicated measurement sensor

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  • Temperature measurement method based on absorption spectrum
  • Temperature measurement method based on absorption spectrum

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[0038] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0039] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the prese...

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Abstract

The invention provides a temperature measurement method based on an absorption spectrum. The temperature measurement method comprises the following steps: S1, signal light emitted by a light source is filtered by an optical filter I and then enters an optical fiber sensor in contact with a measured position; s2, signal light coming out of the optical fiber sensor is filtered by an optical filter II and then enters a photoelectric detector; s3, the photoelectric detector measures the signal light, converts the signal light into an electric signal and inputs the electric signal into a signal processing system; s4, the signal processing system converts the electric signal into a digital signal, the digital signal is compared with standard data, a temperature value matched with the digital signal is obtained, and the temperature value is the actual temperature value of the contact position of the optical fiber sensor and the measured position. According to the invention, the optical fiber is adopted as a signal transmission medium, so that the problem that the lead resistance of a traditional thermocouple type contact temperature measuring device cannot be eliminated at different temperatures is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of temperature measurement, in particular to a temperature measurement method based on absorption spectrum. Background technique [0002] Temperature measurement can be divided into two categories: non-contact and contact. Non-contact thermometers measure infrared energy emitted by a target, they respond quickly and are often used to measure moving or intermittent targets, targets in a vacuum, and targets that are inaccessible due to harsh environments, structural constraints, or safety hazards. But their cost is high; the measurement distance is affected by the atmosphere, and the longest is not more than 2.5m; the operating accuracy ranges from 1% to 3%. And, worst of all, non-contact thermometers have difficulty measuring the temperature of reflective surfaces. This is because the working principle of the non-contact thermometer is to determine the infrared energy based on the black body radiation curve...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/00G01K11/32
CPCG01K11/006G01K11/32
Inventor 王颜超刘万发谭彦楠徐东东贾春燕
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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