CN-121595033-B - Temperature and gas detection system and method based on ultraviolet-near infrared spectrum

CN121595033BCN 121595033 BCN121595033 BCN 121595033BCN-121595033-B

Abstract

The application discloses a temperature and gas detection system and method based on ultraviolet to near infrared spectrum, relates to the technical field of spectrum measurement, and solves the technical problems that in the prior art, two sets of independent equipment are adopted to respectively monitor the temperature and the environment in the smelting process, occupy the space in a smelting furnace and increase the complexity of the system; the method comprises the steps of obtaining spontaneous radiation light of a target to be detected; performing dispersion and light splitting on spontaneous radiation light to obtain spectral data of all wave bands of ultraviolet to near infrared light; denoising the spectrum data to obtain a spectrum of a target to be detected; obtaining temperature data according to spectrum analysis of a target to be detected; calculating to obtain gas concentration based on the spectrum and a pre-established spectrum database; the temperature of the target to be measured can be accurately measured, and the measurement accuracy is improved.

Inventors

BI YALI
ZHOU MING
YANG JILEI
YANG YUMENG
WANG SHUAI
LI XIUJUAN

Assignees

安徽万朗磁塑股份有限公司
合肥工业大学

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (5)

1. The temperature and gas detection system based on ultraviolet to near infrared spectrum is characterized by comprising a spectrum collection module and a data processing module; The spectrum collecting module is used for acquiring spontaneous radiation light of a target to be detected, carrying out dispersion and light splitting on the spontaneous radiation light to obtain spectrum data of all wave bands of ultraviolet light to near infrared light; the data processing module is used for carrying out denoising treatment on the optical spectrum data to obtain a spectrum of a target to be detected, obtaining temperature data according to the spectrum analysis of the target to be detected, and calculating to obtain gas concentration based on the spectrum and a pre-established spectrum database; the spectrum collecting module comprises a photon collecting unit and a concave grating spectrometer, wherein the output end of the photon collecting unit is connected with the input end of the concave grating spectrometer; The photon collecting unit is used for collecting spontaneous radiation light of the target to be detected; The concave grating spectrometer is used for carrying out dispersion and light splitting on spontaneous radiation light of a target to be detected; The spectrum collection module further comprises a double detector array and an ADC unit; the double detector array is arranged at the focal plane of the concave grating spectrometer and is connected with the input end of the ADC unit, and is used for collecting full-band spectrum intensity; the focal plane adopts a precise fine tuning bracket, double detectors (CCD/InGaAs) are spliced along the dispersion direction, and 5% pixel overlapping wave bands are reserved in the overlapping wave bands; The data processing module comprises a noise elimination unit, a spectrum separation unit and a temperature calculation unit; The output end of the spectrum separation unit is connected with the input end of the temperature calculation unit; The system comprises a noise elimination unit, a spectrum separation unit, a temperature calculation unit and a temperature detection unit, wherein the noise elimination unit is used for eliminating noise in ultraviolet-near infrared full-band spectrum data, the spectrum separation unit is used for eliminating wavelengths of ultraviolet-near infrared band gas absorption peaks, and the temperature calculation unit is used for acquiring the temperature of a target to be detected based on the spectrum of the target to be detected; The gas concentration is calculated based on the spectrum and a pre-established spectrum database, and the method comprises the following steps: matching the spectrum with a spectrum database to obtain corresponding key parameters, wherein the key parameters comprise the line intensity, temperature and pressure of gas absorption under the target wavelength; measuring core data of a spectrum, wherein the core data comprises optical path length, transmitted light intensity when no gas exists and transmitted light intensity when the gas exists; constructing a concentration calculation function: Calculating the gas concentration according to the concentration calculation function; Wherein, the The transmittance is expressed as: ; Representing the optical path length; A line intensity representing the absorption of the gas at the target wavelength; Indicating transmitted light intensity in the presence of gas; Indicating transmitted light intensity without gas; indicating the gas concentration.
2. The ultraviolet to near infrared spectrum based temperature and gas detection system according to claim 1, wherein the photon collection unit is composed of a quartz and magnesium fluoride compound lens group; the concave grating spectrometer consists of an incident slit, a collimating mirror and a reflective concave grating; The incidence slit is used for balancing resolution and light intensity, the collimating mirror is used for enabling light beams to vertically enter the concave grating, and the reflective concave grating is used for dispersion and light splitting.
3. The temperature and gas detection system based on ultraviolet to near infrared spectrum according to claim 1, wherein the spectrum separation unit is used for establishing an environment light intensity database when no gas to be detected exists; and eliminating the wavelength at the gas absorption peak based on the energy-saving inquiry of the ultraviolet to near infrared light wave band by the environment light intensity database, the impurity absorption spectrum and the environment spectrum database when no gas to be detected exists.
4. The temperature and gas detection system based on the ultraviolet-near infrared spectrum according to claim 1, wherein the temperature calculation unit is used for constructing and training a temperature analysis model, analyzing the spectrum of the target to be detected by using the trained temperature analysis model to obtain the temperature of the target to be detected, and processing the spectrum of the target to be detected by using the Lambert-Beer law.
5. A temperature and gas detection method based on ultraviolet to near infrared spectrum, which is applied to the temperature and gas detection system based on ultraviolet to near infrared spectrum as claimed in any one of claims 1 to 4, and is characterized by comprising the following steps: acquiring spontaneous radiation light of a target to be detected; Performing dispersion and light splitting on spontaneous radiation light to obtain spectral data of all wave bands of ultraviolet to near infrared light; denoising the spectrum data to obtain a spectrum of a target to be detected; Obtaining temperature data according to spectrum analysis of a target to be detected; calculating to obtain gas concentration based on the spectrum and a pre-established spectrum database; the spectrum collecting module comprises a photon collecting unit and a concave grating spectrometer, wherein the output end of the photon collecting unit is connected with the input end of the concave grating spectrometer; The photon collecting unit is used for collecting spontaneous radiation light of the target to be detected; The concave grating spectrometer is used for carrying out dispersion and light splitting on spontaneous radiation light of a target to be detected; The spectrum collection module further comprises a double detector array and an ADC unit; the double detector array is arranged at the focal plane of the concave grating spectrometer and is connected with the input end of the ADC unit, and is used for collecting full-band spectrum intensity; The focal plane adopts a precise fine tuning bracket, double detectors are spliced along the dispersion direction, and 5% pixel overlapping wave bands are reserved in overlapping wave bands; The data processing module comprises a noise elimination unit, a spectrum separation unit and a temperature calculation unit; The output end of the spectrum separation unit is connected with the input end of the temperature calculation unit; The system comprises a noise elimination unit, a spectrum separation unit, a temperature calculation unit and a temperature detection unit, wherein the noise elimination unit is used for eliminating noise in ultraviolet-near infrared full-band spectrum data, the spectrum separation unit is used for eliminating wavelengths of ultraviolet-near infrared band gas absorption peaks, and the temperature calculation unit is used for acquiring the temperature of a target to be detected based on the spectrum of the target to be detected; The gas concentration is calculated based on the spectrum and a pre-established spectrum database, and the method comprises the following steps: matching the spectrum with a spectrum database to obtain corresponding key parameters, wherein the key parameters comprise the line intensity, temperature and pressure of gas absorption under the target wavelength; measuring core data of a spectrum, wherein the core data comprises optical path length, transmitted light intensity when no gas exists and transmitted light intensity when the gas exists; constructing a concentration calculation function: Calculating the gas concentration according to the concentration calculation function; Wherein, the The transmittance is expressed as: ; Representing the optical path length; A line intensity representing the absorption of the gas at the target wavelength; Indicating transmitted light intensity in the presence of gas; Indicating transmitted light intensity without gas; indicating the gas concentration.

Description

Temperature and gas detection system and method based on ultraviolet-near infrared spectrum Technical Field The application belongs to the field of spectrum measurement, and particularly relates to a temperature and gas detection system and method based on ultraviolet to near infrared spectrum. Background The ultraviolet-near infrared spectrum is a continuous spectrum analysis technology covering ultraviolet, visible and near infrared bands, the ultraviolet-near infrared spectrum technology is used for detecting spectral information emitted or reflected by an object without directly contacting the object to be detected, meanwhile, temperature change can be quickly captured to form a thermal imaging graph, temperature distribution is visually displayed, each gas molecule has unique infrared absorption frequency, the ultraviolet-near infrared spectrum technology can accurately identify target gas to avoid cross interference, meanwhile, qualitative and quantitative analysis of the gas can be completed in a short time, industrial online real-time monitoring is supported, and the ultraviolet-near infrared spectrum technology has the core advantages of non-contact, high sensitivity, real-time monitoring, quick response and the like. In the complex production environment for detecting iron and steel smelting, the temperature measurement is easily affected by the environmental factors due to the influence factors such as high temperature, high humidity, atmospheric attenuation, environmental dust and other high temperature targets, so that the detection accuracy is reduced, the measurement temperature is not accurate enough, two sets of independent equipment are adopted in the prior art to respectively monitor the temperature measurement and the environment in the smelting process, the space in a smelting furnace is occupied, and the complexity of the system is increased. Disclosure of Invention The application aims to at least solve one of the technical problems in the prior art, and therefore, the application provides a temperature and gas detection system and method based on ultraviolet to near infrared spectrum, which are used for solving the technical problems that two sets of independent equipment are adopted in the prior art to respectively monitor the temperature and the environment in the smelting process, occupy the space in a smelting furnace and increase the complexity of the system. To achieve the above object, a first aspect of the present application provides a temperature and gas detection system based on ultraviolet to near infrared spectrum, comprising a spectrum collection module and a data processing module; The spectrum collecting module is used for acquiring spontaneous radiation light of a target to be detected, carrying out dispersion and light splitting on the spontaneous radiation light to obtain spectrum data of all wave bands of ultraviolet light to near infrared light; the data processing module is used for carrying out denoising processing on the optical spectrum data to obtain a spectrum of a target to be detected, obtaining temperature data according to spectrum analysis of the target to be detected, and calculating to obtain gas concentration based on the spectrum and a pre-established spectrum database. Preferably, the spectrum collecting module comprises a photon collecting unit and a concave grating spectrometer, wherein the output end of the photon collecting unit is connected with the input end of the concave grating spectrometer; The photon collecting unit is used for collecting spontaneous radiation light of the target to be detected; The concave grating spectrometer is used for carrying out dispersion and light splitting on spontaneous radiation light of the target to be detected. Preferably, the photon collecting unit is composed of a quartz and magnesium fluoride compound lens group; the concave grating spectrometer consists of an incident slit, a collimating mirror and a reflective concave grating; The incidence slit is used for balancing resolution and light intensity, the collimating mirror is used for enabling light beams to vertically enter the concave grating, and the reflective concave grating is used for dispersion and light splitting. Preferably, the spectrum collection module further comprises a dual detector array and an ADC unit; The double detector array is arranged at the focal plane of the concave grating spectrometer, is connected with the input end of the ADC unit and is used for collecting full-band spectrum intensity. Preferably, the data processing module comprises a noise elimination unit, a spectrum separation unit and a temperature calculation unit; the output end of the spectrum separation unit is connected with the input end of the temperature calculation unit. Preferably, the noise elimination unit is used for eliminating noise in ultraviolet-near infrared full-band spectrum data, the spectrum separation unit is used for eliminating wavelengths of