CN113340840A - C4F7N mixed gas infrared spectrum multifunctional detection device - Google Patents
C4F7N mixed gas infrared spectrum multifunctional detection deviceDownload PDFInfo
- Publication number
- CN113340840A CN113340840ACN202110800078.1ACN202110800078ACN113340840ACN 113340840 ACN113340840 ACN 113340840ACN 202110800078 ACN202110800078 ACN 202110800078ACN 113340840 ACN113340840 ACN 113340840A
- Authority
- CN
- China
- Prior art keywords
- infrared light
- detection
- mixed gas
- gas
- detection chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
- G01N21/3518—Devices using gas filter correlation techniques; Devices using gas pressure modulation techniques
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/0303—Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
- G01N21/274—Calibration, base line adjustment, drift correction
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N2021/0378—Shapes
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
- G01N2021/3536—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis using modulation of pressure or density
Landscapes
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Translated fromChinese
Description
Technical Field
The invention relates to a mixed gas mixing ratio detection and decomposition component detection technology, in particular to a method C4F7N mixed gas infrared spectrum multifunctional detection device.
Background
SF6The gas is widely applied to the power industry due to the excellent insulating and arc extinguishing performance of the gas. But SF6Has extremely strong greenhouse effect, the atmospheric life is 3200 years, and the Global Warming Potential (GWP) of the gas is CO223500 times of the product, has certain threat to environment. Isobutyronitrile (C)4F7N, Novec TM 4710) as a new environment-friendly insulating gas with N2Or CO2Mixture ofThe synthetic gas insulating medium has the characteristics of low toxicity, low GWP and the like, has excellent insulating property and is very suitable for being used as SF6Replacing the gas. At present, C4F7N-mixed gas insulation media have gradually come into practical use, such as gas insulated transmission lines (GIL) of 420kV and Gas Insulated Switchgear (GIS) of 145 kV.
At present, for C4F7The research on the N mixed gas mainly focuses on the aspects of physical and chemical properties, insulating performance and the like of the N mixed gas. With C4F7The gradual popularization and application of the equipment of N mist as insulating medium, in order to guarantee the safe and reliable operation of equipment, it is indispensable to develop the state monitoring research of mist electrical equipment. For C4F7N mixed gas insulation medium, the content of main gas in the mixed gas determines the insulation performance, and effective means are needed to carry out on C4F7Accurately detecting the mixing ratio of the N mixed gas; at the same time, C4F7During long-term use of the N mixed gas equipment, various insulation defects can be generated inside the equipment, including metal burrs, free conductive particles, insulator defects and the like in the equipment, and the generation and development of the insulation defects further cause C in the equipment4F7The N mixed gas is decomposed to generate a plurality of C4F7N decomposition products. Analysis of these products revealed that C4F7The internal insulation condition of the N mixed gas equipment has important significance for the health condition detection and maintenance of the equipment. Thus, C is carried out4F7The research on the detection technology of the N mixed gas has important engineering significance for the operation and maintenance of equipment in the future.
In the prior art, in C4F7In the aspects of mixed gas mixing ratio detection and decomposed component detection of N mixed gas, Fourier infrared spectroscopy is conventionally adopted, but detection equipment is large, heavy and inconvenient to carry, and has various inconveniences in the aspect of field detection, and a portable infrared spectrum detection device is not reported yet; in addition, the existing detection equipment is applicable to single and limited detection function and cannot adapt to field electrical equipment operationAnd (4) detecting various detection requirements.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a C4F7The multifunctional detection device for infrared spectrum of N mixed gas can realize C4F7The mixing ratio detection and the decomposition component detection of the N mixed gas are realized, and the integration of multiple detection functions in one detection device is realized, thereby improving the detection efficiency of C4F7And the operation and detection efficiency of the N mixed gas electrical equipment.
The invention adopts the following technical scheme.
C4F7The multifunctional detection device for the infrared spectrum of the N mixed gas comprises a gas pool, a front cover of the gas pool and a rear cover of the gas pool.
The gas pool comprises an outer cylinder and an inner cylinder which are coaxially arranged, and a space between the outer cylinder and the inner cylinder is evenly divided into a plurality of detection chambers along the axial direction by using a partition plate; gas flow exists between the detection chambers; during gas detection, gas to be detected is statically placed in each detection chamber;
an infrared light source is arranged on a front cover of the gas cell, the center of the infrared light source is over against the axis of the cylinder in the gas cell, and during gas detection, infrared light provided by the infrared light source directly enters the inner space of the inner cylinder;
a plurality of photoelectric detection sensors are also arranged on the front cover of the gas pool; one photoelectric detection sensor is correspondingly arranged in one detection chamber; the other end of the detection chamber, which is far away from the photoelectric sensor, is provided with a filter inserting port, and the filter is connected with the detection chamber in an inserting mode; the light transmission wave bands of the light filters of the detection chambers are different from each other;
and a gold-plated reflector is arranged on the rear cover of the gas cell and used for reflecting infrared light to each optical filter.
Preferably, the first and second electrodes are formed of a metal,
starting an infrared light source, enabling infrared light to pass through the inner space of the cylinder in the gas cell and directly irradiate the gold-plated reflecting mirror, enabling the gold-plated reflecting mirror to reflect infrared light to each optical filter, and enabling each optical filter to filter the infrared light, so that the infrared light with specific wavelength is emitted to corresponding detectionIndoor, photoelectric detection sensor detection is by C4F7And the N mixed gas absorbs the infrared light intensity and converts the light intensity signal into an electric signal.
Preferably, the first and second electrodes are formed of a metal,
a group of air inlets and air outlets are arranged on the outer column body of the air pool; the air inlet is connected with an air inlet path switch; the air outlet is connected with an air outlet path switch and an air pump; the air inlet and the air outlet are arranged on the same side of the outer column body, and a connecting line of the centers of the air inlet and the air outlet is parallel to the axis of the outer column body.
A temperature and pressure sensor is arranged in one detection chamber of the gas pool; and the temperature and pressure sensor is used for detecting the temperature of the gas pool and the pressure inside the gas pool.
The inner wall of the detection chamber is coated with a reflecting film for reflecting the incident infrared light.
The cross-sectional shapes of the outer cylinder and the inner cylinder are the same, and the outer cylinder and the inner cylinder comprise an outer prism body and an inner prism body.
The infrared light source provides infrared light including: the wavelength is 750-780 cm-1Infrared light, C4F7And decomposing the infrared light with the wave band corresponding to the component of the N mixed gas.
Preferably, the first and second electrodes are formed of a metal,
at a wavelength of 750-780 cm-1Under infrared light of (2), to (C)4F7The method for detecting the mixing ratio of the N mixed gas comprises the following steps:
step 1.1, selecting one detection chamber as a reference detection chamber, wherein the light transmission wave band of the light filter of the reference detection chamber is different from the light transmission wave bands of the light filters of other detection chambers, and the light transmission wave bands of the light filters of other detection chambers are the same;
step 1.2, waiting for C in each detection chamber4F7When the N mixed gas reaches the detection concentration, an infrared light source is started, infrared light penetrates through the inner space of the cylinder in the gas cell and is directly irradiated to the gold-plated reflecting mirror, the gold-plated reflecting mirror reflects the infrared light to each optical filter, and each optical filter filters the infrared light, so that the wavelength is 750-780 cm-1The infrared light is emitted into the corresponding detection chamber;
step 1.3, the photoelectric detection sensor corresponding to each detection chamber detects the object to be detected by C4F7The intensity of the infrared light absorbed by the N mixed gas is converted into an electric signal; and taking the electric signal of the reference detection chamber as a compensation electric signal, and performing compensation processing on the electric signals of the rest detection chambers.
At C4F7Under the infrared light of the wave band corresponding to the decomposition component of the N mixed gas, the component C4F7Detecting the decomposition components of the N mixed gas, comprising the following steps:
step 2.1, Collection C4F7N is the absorption wave band of each decomposition component to be detected of the mixed gas;
step 2.2, selecting a detection chamber, wherein the light transmission wave band of an optical filter of the detection chamber is different from the absorption wave band of each decomposition component to be detected, and taking the detection chamber as a reference detection chamber;
step 2.3, except the reference detection chamber, replacing the optical filters of other detection chambers according to the absorption wave bands of the decomposition components to be detected, so that the light transmission wave bands of the optical filters correspond to the absorption wave bands of the decomposition components to be detected one by one;
step 2.4, starting an infrared light source, enabling the infrared light to pass through the inner space of the cylinder in the gas cell and directly irradiate to a gold-plated reflector, enabling the gold-plated reflector to reflect the infrared light to each optical filter, and enabling each optical filter to filter the infrared light, so that the infrared light of each absorption waveband of the decomposition component to be detected is emitted into a corresponding detection chamber;
step 2.5, the photoelectric detection sensor corresponding to each detection chamber detects the object to be detected by C4F7The intensity of the infrared light absorbed by the N mixed gas is converted into an electric signal; and taking the electric signal of the reference detection chamber as a compensation electric signal, and performing compensation processing on the electric signals of the rest detection chambers.
Preferably, the first and second electrodes are formed of a metal,
the photoelectric detection sensor is connected with a signal processing unit; and the signal processing unit is used for performing compensation processing on the electric signals of the rest detection chambers by taking the electric signals of the reference detection chambers as compensation electric signals.
Compared with the prior art, the invention has the beneficial effects that:
1. make full use of C4F7The difference of infrared absorption intensity of N gas and its decomposition components in different infrared bands is detected by using infrared light of specific wavelength to detect C4F7N mixed gas can effectively measure infrared light and C under different wave bands4F7The light intensity after the action of N gas changes to realize C4F7The mixing ratio detection and the decomposition component detection of the N mixed gas have strong demand and practicability.
2. The infrared light source, the optical filter, the gold-plated reflecting mirror, the gas cell, the photoelectric detection sensor and the related signal processing unit are all integrated in one set of device, the structure is compact, the carrying is easy, and the device is suitable for the working environment of field detection.
Drawings
FIG. 1 shows a block diagram C according to an embodiment of the present invention4F7The structure schematic diagram of the multifunctional detection device for the infrared spectrum of the N mixed gas;
the figures are labeled as follows:
2: infrared light source, 3: photoelectric detection sensor, 4: optical filter, 5: temperature and pressure sensor, 6: air inlet, 7: gas outlet, 8: gold-plated mirror, 9: a rear cover;
FIG. 2 shows a block diagram C according to an embodiment of the present invention4F7A schematic diagram of an optical filter socket of the multifunctional detection device for infrared spectrum of N mixed gas;
FIG. 3 shows a block diagram C according to an embodiment of the present invention4F7N mixed gas infrared spectrum multifunctional detection device pair C4F7A flow chart of detecting the decomposition components of the N mixed gas.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Example 1.
As shown in figure 1, a C4F7The multifunctional detector for infrared spectrum of N mixed gas includes gas cellA front cover of the gas cell and a rear cover 9 of the gas cell.
The gas pool comprises an outer cylinder and an inner cylinder which are coaxially arranged, and a space between the outer cylinder and the inner cylinder is evenly divided into a plurality of detection chambers along the axial direction by using a partition plate; gas flow exists between the detection chambers; during gas detection, gas to be detected is statically arranged in each detection chamber.
Theinfrared light source 2 is arranged on the front cover of the gas cell, the center of theinfrared light source 2 is over against the axis of the cylinder in the gas cell, and during gas detection, infrared light provided by theinfrared light source 2 directly enters the inner space of the inner cylinder.
A plurality of photoelectric detection sensors 3 are also arranged on the front cover of the gas cell; one photoelectric detection sensor 3 is correspondingly arranged in one detection chamber; as shown in fig. 2, the other end of the detection chamber, which is far away from the photoelectric sensor 3, is provided with afilter 4 interface, and thefilter 4 is connected with the detection chamber in an insertion manner; the light transmission wavelength bands of thefilters 4 of the detection chambers are different from each other.
The rear cover of the gas cell is provided with a gold-plated reflector 8 for reflecting infrared light to each optical filter and increasing the optical path length.
In the preferred embodiment, the gas cell is divided into a plurality of detection chambers, and the light filters of the detection cells are replaced to simultaneously detect C4F7N are each a decomposition component in the mixed gas. Detection by comparison with a single air cell C4F7During the decomposition component among the N mist, because the air chamber is small in quantity, the detection of each decomposition component is gone on at same air chamber, easily causes mutual interference, influences multiple problems such as detection precision, and the gas cell adopts the structure of a plurality of detection rooms, and the infrared band that the detection room shines can set up according to the decomposition component that detects, avoids the component of other infrared bands to the influence that detects, improves and detects the precision. Meanwhile, the optical filter arranged on one side of each detection chamber can be flexibly replaced according to the requirements of the detected components, so that the detection type and the use flexibility of the detection device are obviously improved.
In particular, the amount of the solvent to be used,
a group of air inlets 6 and air outlets 7 are arranged on the outer column body of the gas pool; the air inlet 6 is connected with an air inlet air path switch; the air outlet 7 is connected with an air outlet path switch and an air pump.
A temperature and pressure sensor 5 is arranged in one detection chamber of the gas pool; the temperature and pressure sensor 5 is used for detecting both the temperature of the gas cell and the pressure inside the gas cell.
In the preferred embodiment, the detection device needs to be vacuumized before being used, that is, the gas pool in the detection device is vacuumized by the external air pump connected with the air outlet 7, so that residual experimental gas and gas impurities in the gas pool are prevented from carrying out C in the detection process4F7The related detection of the N mixed gas causes influence, so that the detected C4F7The concentration of the N mixed gas is deviated.
In addition, through the vacuum-pumping treatment, the experimental gas and gas impurities in the gas pool are effectively removed, and C to be detected is avoided4F7N is doped with impurities as C4F7The detection of the N mixed gas provides a better detection environment, and is beneficial to improving C4F7The detection accuracy of the mixing ratio detection and the decomposition component detection of the N mixed gas.
During the vacuum-pumping operation, the pressure in the gas cell can be detected by the temperature and pressure sensor 5, and when the pressure detected by the temperature and pressure sensor 5 is greater than-0.1 MPa, the vacuum-pumping operation is completed.
The inner wall of the detection chamber is coated with a reflecting film for reflecting the incident infrared light, and the optical path length is increased, so that the detection gas can fully absorb the infrared light.
The cross-sectional shapes of the outer cylinder and the inner cylinder are the same, and the outer cylinder and the inner cylinder comprise an outer prism body and an inner prism body. In the preferred embodiment, an outer hexagonal prism and an inner hexagonal prism are used, both of which have equilateral hexagonal cross sections.
Because the gas tank needs to be vacuumized to remove the interference of other gas impurities in the gas tank, the pressure difference of the inner part and the outer part of the gas tank is large, the problems of pipe wall breakage and gas leakage can be caused, and the stable operation of equipment and the personal safety of operators are threatened. Therefore, the gas tank is well sealed with the infraredlight source 2 and the photoelectric detection sensor 3, high-strength gas tank materials are selected, structural distribution is improved, the device is compact in structure, the air gap position of the device can be effectively reduced, structural strength is improved, and meanwhile, pressure change in the gas tank can be monitored in real time through the pressure sensor 5, so that the occurrence of detection environment change and safety accidents in the gas tank is prevented.
In particular, the amount of the solvent to be used,
starting an infrared light source, enabling infrared light to pass through the inner space of the cylinder in the gas cell and directly irradiate the gold-plated reflecting mirror, enabling the gold-plated reflecting mirror to reflect infrared light to each optical filter, filtering the infrared light by each optical filter, enabling the infrared light with specific wavelength to be incident into a corresponding detection chamber, and enabling a photoelectric detection sensor to detect the infrared light to be detected by the C4F7And the N mixed gas absorbs the infrared light intensity and converts the light intensity signal into an electric signal.
The infrared light source provides infrared light including: the wavelength is 750-780 cm-1Infrared light, C4F7And decomposing the infrared light with the wave band corresponding to the component of the N mixed gas.
Example 2.
At a wavelength of 750-780 cm-1Under infrared light of (2), to (C)4F7The method for detecting the mixing ratio of the N mixed gas comprises the following steps:
step 1.1, selecting one detection chamber as a reference detection chamber, wherein the light transmission wave bands of the light filters of the reference detection chamber are different from the light transmission wave bands of the light filters of other detection chambers, and the light transmission wave bands of the light filters of other detection chambers are the same.
Step 1.2, waiting for C in each detection chamber4F7When the N mixed gas reaches the detection concentration, an infrared light source is started, infrared light penetrates through the inner space of the cylinder in the gas cell and is directly irradiated to the gold-plated reflecting mirror, the gold-plated reflecting mirror reflects the infrared light to each optical filter, and each optical filter filters the infrared light, so that the wavelength is 750-780 cm-1The infrared light is emitted into the corresponding detection chamber.
Step 1.3, the photoelectric detection sensor corresponding to each detection chamber detects the object to be detected by C4F7N mixCombining the infrared light intensity absorbed by the gas and converting the light intensity signal into an electric signal; and taking the electric signal of the reference detection chamber as a compensation electric signal, and performing compensation processing on the electric signals of the rest detection chambers.
Example 3.
As shown in FIG. 3, at C4F7Under the infrared light of the wave band corresponding to the decomposition component of the N mixed gas, the component C4F7Detecting the decomposition components of the N mixed gas, comprising the following steps:
step 2.1, Collection C4F7And N is the absorption wave band of each to-be-detected decomposition component of the mixed gas.
And 2.2, selecting a detection chamber, wherein the light transmission wave band of the optical filter of the detection chamber is different from the absorption wave band of each decomposition component to be detected, and taking the detection chamber as a reference detection chamber.
And 2.3, replacing the optical filters of other detection chambers except the reference detection chamber according to the absorption wave band of each to-be-detected decomposition component, so that the light transmission wave band of each optical filter corresponds to the absorption wave band of each to-be-detected decomposition component one to one.
And 2.4, starting an infrared light source, enabling the infrared light to pass through the inner space of the cylinder in the gas cell and directly irradiate to the gold-plated reflector, enabling the gold-plated reflector to reflect the infrared light to each optical filter, and enabling each optical filter to filter the infrared light, so that the infrared light of each absorption waveband of the decomposition component to be detected is emitted into a corresponding detection chamber.
Step 2.5, the photoelectric detection sensor corresponding to each detection chamber detects the object to be detected by C4F7The intensity of the infrared light absorbed by the N mixed gas is converted into an electric signal; and taking the electric signal of the reference detection chamber as a compensation electric signal, and performing compensation processing on the electric signals of the rest detection chambers.
Example 4.
The photoelectric detection sensor is connected with a signal processing unit; and the signal processing unit is used for performing compensation processing on the electric signals of the rest detection chambers by taking the electric signals of the reference detection chambers as compensation electric signals.
Compared with the prior art, the invention has the beneficial effects that:
1. make full use of C4F7The difference of infrared absorption intensity of N gas and its decomposition components in different infrared bands is detected by using infrared light of specific wavelength to detect C4F7N mixed gas can effectively measure infrared light and C under different wave bands4F7The light intensity after the action of N gas changes to realize C4F7The mixing ratio detection and the decomposition component detection of the N mixed gas have strong demand and practicability.
2. The infrared light source, the optical filter, the gold-plated reflecting mirror, the gas cell, the photoelectric detection sensor and the related signal processing unit are all integrated in one set of device, the structure is compact, the carrying is easy, and the device is suitable for the working environment of field detection.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. C4F7The multifunctional detection device for the infrared spectrum of the N mixed gas comprises a gas cell, a front cover of the gas cell and a rear cover of the gas cell, and is characterized in that,
the gas pool comprises an outer cylinder and an inner cylinder which are coaxially arranged, and a space between the outer cylinder and the inner cylinder is evenly divided into a plurality of detection chambers along the axial direction by using a partition plate; gas flow exists between the detection chambers; during gas detection, gas to be detected is statically placed in each detection chamber;
an infrared light source is arranged on the front cover of the gas cell, the center of the infrared light source is over against the axis of the cylinder in the gas cell, and during gas detection, infrared light provided by the infrared light source directly enters the inner space of the inner cylinder;
a plurality of photoelectric detection sensors are also arranged on the front cover of the gas pool; one photoelectric detection sensor is correspondingly arranged in one detection chamber; the other end of the detection chamber, which is far away from the photoelectric sensor, is provided with a filter inserting port, and the filter is connected with the detection chamber in an inserting mode; the light transmission wave bands of the light filters of the detection chambers are different from each other;
and a gold-plated reflector is arranged on the rear cover of the gas cell and is used for reflecting infrared light to each optical filter.
2. A compound C according to claim 14F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
starting an infrared light source, enabling infrared light to pass through the inner space of the cylinder in the gas cell and directly irradiate the gold-plated reflecting mirror, enabling the gold-plated reflecting mirror to reflect infrared light to each optical filter, filtering the infrared light by each optical filter, enabling the infrared light with specific wavelength to be incident into a corresponding detection chamber, and enabling a photoelectric detection sensor to detect the infrared light to be detected by the C4F7And the N mixed gas absorbs the infrared light intensity and converts the light intensity signal into an electric signal.
3. A compound C according to claim 14F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
a group of air inlets and air outlets are arranged on the outer column body of the gas pool; the air inlet is connected with an air inlet path switch; the air outlet is connected with an air outlet path switch and an air pump;
the air inlet and the air outlet are arranged on the same side of the outer column body, and a connecting line of the centers of the air inlet and the air outlet is parallel to the axis of the outer column body.
4. A compound C according to claim 14F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
a temperature and pressure sensor is arranged in one detection chamber of the gas pool; the temperature and pressure sensor is used for detecting the temperature of the gas pool and the pressure inside the gas pool.
5. A compound C according to claim 14F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
the inner wall of the detection chamber is plated with a reflecting film for reflecting the incident infrared light.
6. A compound C according to claim 14F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
the cross-sectional shapes of the outer cylinder and the inner cylinder are the same, and the outer cylinder and the inner cylinder comprise an outer prism body and an inner prism body.
7. A compound C according to claim 24F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
the infrared light provided by the infrared light source comprises: the wavelength is 750-780 cm-1Infrared light, C4F7And decomposing the infrared light with the wave band corresponding to the component of the N mixed gas.
8. A compound C according to claim 74F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
at a wavelength of 750-780 cm-1Under infrared light of (2), to (C)4F7The method for detecting the mixing ratio of the N mixed gas comprises the following steps:
step 1.1, selecting one detection chamber as a reference detection chamber, wherein the light transmission wave band of the light filter of the reference detection chamber is different from the light transmission wave bands of the light filters of other detection chambers, and the light transmission wave bands of the light filters of other detection chambers are the same;
step 1.2, waiting for C in each detection chamber4F7When the N mixed gas reaches the detection concentration, an infrared light source is started, infrared light penetrates through the inner space of the cylinder in the gas cell and is directly irradiated to the gold-plated reflecting mirror, the gold-plated reflecting mirror reflects the infrared light to each optical filter, and each optical filter filters the infrared lightSo that the wavelength is 750 to 780cm-1The infrared light is emitted into the corresponding detection chamber;
step 1.3, the photoelectric detection sensor corresponding to each detection chamber detects the object to be detected by C4F7The intensity of the infrared light absorbed by the N mixed gas is converted into an electric signal; and taking the electric signal of the reference detection chamber as a compensation electric signal, and performing compensation processing on the electric signals of the rest detection chambers.
9. A compound C according to claim 74F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
at C4F7Under the infrared light of the wave band corresponding to the decomposition component of the N mixed gas, the component C4F7Detecting the decomposition components of the N mixed gas, comprising the following steps:
step 2.1, Collection C4F7N is the absorption wave band of each decomposition component to be detected of the mixed gas;
step 2.2, selecting a detection chamber, wherein the light transmission wave band of an optical filter of the detection chamber is different from the absorption wave band of each decomposition component to be detected, and taking the detection chamber as a reference detection chamber;
step 2.3, except the reference detection chamber, replacing the optical filters of other detection chambers according to the absorption wave bands of the decomposition components to be detected, so that the light transmission wave bands of the optical filters correspond to the absorption wave bands of the decomposition components to be detected one by one;
step 2.4, starting an infrared light source, enabling the infrared light to pass through the inner space of the cylinder in the gas cell and directly irradiate to a gold-plated reflector, enabling the gold-plated reflector to reflect the infrared light to each optical filter, and enabling each optical filter to filter the infrared light, so that the infrared light of each absorption waveband of the decomposition component to be detected is emitted into a corresponding detection chamber;
step 2.5, the photoelectric detection sensor corresponding to each detection chamber detects the object to be detected by C4F7The intensity of the infrared light absorbed by the N mixed gas is converted into an electric signal; and taking the electric signal of the reference detection chamber as a compensation electric signal, and performing compensation processing on the electric signals of the rest detection chambers.
10. A C according to claim 8 or 94F7The multifunctional infrared spectrum detection device for N mixed gas is characterized in that,
the photoelectric detection sensor is connected with a signal processing unit; and the signal processing unit is used for performing compensation processing on the electric signals of the rest detection chambers by taking the electric signals of the reference detection chambers as compensation electric signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110800078.1ACN113340840A (en) | 2021-07-13 | 2021-07-13 | C4F7N mixed gas infrared spectrum multifunctional detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110800078.1ACN113340840A (en) | 2021-07-13 | 2021-07-13 | C4F7N mixed gas infrared spectrum multifunctional detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113340840Atrue CN113340840A (en) | 2021-09-03 |
Family
ID=77479765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110800078.1APendingCN113340840A (en) | 2021-07-13 | 2021-07-13 | C4F7N mixed gas infrared spectrum multifunctional detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113340840A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114527081A (en)* | 2021-11-12 | 2022-05-24 | 国网浙江省电力有限公司桐乡市供电公司 | Ring main unit C4F7N mixed gas detection method and device |
| CN114839154A (en)* | 2022-04-29 | 2022-08-02 | 杭州电子科技大学平湖数字技术创新研究院有限公司 | Device and method for detecting hydrogen sulfide gas |
| CN119619045A (en)* | 2024-12-25 | 2025-03-14 | 江苏舒茨测控设备股份有限公司 | Detection method of multi-gas concentration in exhaust gas and gas filtering system |
| CN119619045B (en)* | 2024-12-25 | 2025-10-17 | 江苏舒茨测控设备股份有限公司 | Method for detecting multiple gas concentrations in exhaust gas and gas filtering system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5639443A (en)* | 1979-09-07 | 1981-04-15 | Riken Keiki Kk | Concentration measuring device for multi-point type multi-ingredient gas |
| JPH10339698A (en)* | 1997-06-09 | 1998-12-22 | Itachibori Seisakusho Kk | Infrared-type gas detector |
| CN1216108A (en)* | 1996-01-10 | 1999-05-05 | 恩格尔哈德传感器技术公司 | Passive infrared analysis gas sensors and applicable multichannel detector assemblies |
| US20010045521A1 (en)* | 2000-04-28 | 2001-11-29 | Prozzo Christopher D. | System and method for spectral analysis |
| US20060226367A1 (en)* | 2002-11-07 | 2006-10-12 | E2V Technologies (Uk) Limited | Gas sensors |
| CN1950693A (en)* | 2004-03-29 | 2007-04-18 | 诺维尔技术解决有限公司 | Method and system for detecting one or more gases or gas mixtures and/or for measuring the concentration of one or more gases or gas mixtures |
| CN205209946U (en)* | 2015-10-27 | 2016-05-04 | 中国科学院合肥物质科学研究院 | A sample cell for infrared spectrum multicomponent gas detects |
| CN109781649A (en)* | 2018-12-29 | 2019-05-21 | 哈尔滨理工大学 | A non-split infrared gas sensor suitable for multiple gas detection |
| CN209027988U (en)* | 2018-10-25 | 2019-06-25 | 南京信息工程大学 | An infrared gas sensor with a temperature control system |
| WO2021131574A1 (en)* | 2019-12-26 | 2021-07-01 | 株式会社堀場製作所 | Infrared detector and gas analyzer |
| CN216208581U (en)* | 2021-07-13 | 2022-04-05 | 国网安徽省电力有限公司电力科学研究院 | A portable detection device for C4F7N mixed gas |
- 2021
- 2021-07-13CNCN202110800078.1Apatent/CN113340840A/enactivePending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5639443A (en)* | 1979-09-07 | 1981-04-15 | Riken Keiki Kk | Concentration measuring device for multi-point type multi-ingredient gas |
| CN1216108A (en)* | 1996-01-10 | 1999-05-05 | 恩格尔哈德传感器技术公司 | Passive infrared analysis gas sensors and applicable multichannel detector assemblies |
| JPH10339698A (en)* | 1997-06-09 | 1998-12-22 | Itachibori Seisakusho Kk | Infrared-type gas detector |
| US20010045521A1 (en)* | 2000-04-28 | 2001-11-29 | Prozzo Christopher D. | System and method for spectral analysis |
| US20060226367A1 (en)* | 2002-11-07 | 2006-10-12 | E2V Technologies (Uk) Limited | Gas sensors |
| CN1950693A (en)* | 2004-03-29 | 2007-04-18 | 诺维尔技术解决有限公司 | Method and system for detecting one or more gases or gas mixtures and/or for measuring the concentration of one or more gases or gas mixtures |
| CN205209946U (en)* | 2015-10-27 | 2016-05-04 | 中国科学院合肥物质科学研究院 | A sample cell for infrared spectrum multicomponent gas detects |
| CN209027988U (en)* | 2018-10-25 | 2019-06-25 | 南京信息工程大学 | An infrared gas sensor with a temperature control system |
| CN109781649A (en)* | 2018-12-29 | 2019-05-21 | 哈尔滨理工大学 | A non-split infrared gas sensor suitable for multiple gas detection |
| WO2021131574A1 (en)* | 2019-12-26 | 2021-07-01 | 株式会社堀場製作所 | Infrared detector and gas analyzer |
| CN216208581U (en)* | 2021-07-13 | 2022-04-05 | 国网安徽省电力有限公司电力科学研究院 | A portable detection device for C4F7N mixed gas |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114527081A (en)* | 2021-11-12 | 2022-05-24 | 国网浙江省电力有限公司桐乡市供电公司 | Ring main unit C4F7N mixed gas detection method and device |
| CN114839154A (en)* | 2022-04-29 | 2022-08-02 | 杭州电子科技大学平湖数字技术创新研究院有限公司 | Device and method for detecting hydrogen sulfide gas |
| CN119619045A (en)* | 2024-12-25 | 2025-03-14 | 江苏舒茨测控设备股份有限公司 | Detection method of multi-gas concentration in exhaust gas and gas filtering system |
| CN119619045B (en)* | 2024-12-25 | 2025-10-17 | 江苏舒茨测控设备股份有限公司 | Method for detecting multiple gas concentrations in exhaust gas and gas filtering system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104198393B (en) | SF 6decomposed gas component on-line monitoring system and method in electrical equipment | |
| CN103017991B (en) | Suction type SF6 gas leakage monitoring method | |
| CN107389597B (en) | High-sensitivity gas detection device and method | |
| CN113340840A (en) | C4F7N mixed gas infrared spectrum multifunctional detection device | |
| CN204269439U (en) | Detect the online harmless sampling apparatus of sulfur hexafluoride decomposition gas | |
| CN102944364A (en) | Hydrocarbon combustible gas leakage monitoring device and method based on network transmission | |
| CN203606277U (en) | Device for intelligently detecting ozone content of partial discharge of high-tension switch cabinet | |
| CN110542839B (en) | For SF6All-optical insulation fault monitoring system of gas insulation equipment | |
| CN102661918A (en) | Off-resonance photoacoustic spectrometric detection and analysis device | |
| CN103868853B (en) | For the radial direction resonance photoacoustic cell of sulfur hexafluoride gas decomposable process Real-Time Monitoring | |
| US20120236311A1 (en) | Method for monitoring and/or regulating fuel cells | |
| CN103076301A (en) | Infrared-based SF6 (sulfur hexafluoride) gas decomposition product detecting device | |
| CN216208581U (en) | A portable detection device for C4F7N mixed gas | |
| CN204694637U (en) | Methane gas electric discharge emission spectrum pick-up unit under a kind of room temperature of microminiaturization | |
| WO2005024387A3 (en) | Capillary-discharge based detector for chemical vapor monitoring | |
| CN204064913U (en) | A kind of novel online SO 2gas detection module device | |
| CN206818606U (en) | Qualitative and quantitative analysis device for gas generated by electric automobile power battery system in fire | |
| CN113218906A (en) | Sulfur hexafluoride decomposition component monitoring device and method based on laser transmission signals | |
| CN109142994A (en) | A kind of degree of discharge diagnostic method and device based on sulfur hexafluoride electrical equipment | |
| CN211318204U (en) | An online detection device for sodium aerosol in the air | |
| CN1664563A (en) | Process for detecting sulfur hexafluoride (SF6) gas | |
| CN105403512A (en) | Gas analyzer | |
| CN116660194A (en) | Online detection device and method for organic release matters in explosive granulation process | |
| CN115684058A (en) | A kind of SF6 decomposition gas online detection system and its detection method | |
| CN114878495B (en) | An ultraviolet spectrum online monitoring device and method for SF6 decomposition component mixed gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |