CN215599003U - Optical detection system of flange plate type structure - Google Patents
Optical detection system of flange plate type structure Download PDFInfo
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- CN215599003U CN215599003U CN202122325901.6U CN202122325901U CN215599003U CN 215599003 U CN215599003 U CN 215599003U CN 202122325901 U CN202122325901 U CN 202122325901U CN 215599003 U CN215599003 U CN 215599003U
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- detection chamber
- gas detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 230000003287 optical effect Effects 0.000 title claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 11
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims 1
- 229920001973 fluoroelastomer Polymers 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 47
- 238000000034 method Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses an optical detection system of a flange plate type structure, which is used for detecting a detected gas and comprises a light source, an infrared detector, a prism, a gas detection chamber, an off-axis parabolic mirror, a data acquisition and processing unit and a flange plate, wherein the gas detection chamber is arranged on the flange plate, a first transparent window sheet and a second transparent window sheet are respectively arranged at two ends of the gas detection chamber, the prism comprises a first prism and a second prism, the off-axis parabolic mirror comprises a first off-axis parabolic mirror and a second off-axis parabolic mirror, the first off-axis parabolic mirror is connected with the second off-axis parabolic mirror through the gas detection chamber, the infrared detector is respectively arranged on the first prism and the second prism, a pyroelectric sensor is arranged on the gas detection chamber, a light filter is arranged in the gas detection chamber, and the light filter divides a light beam emitted by the light source into a detection channel and a reference channel. The utility model can eliminate the detection error caused by zero drift caused by environmental factors and the optical detection system, and improve the detection precision.
Description
Technical Field
The utility model relates to the technical field of optical live detection of gas components, in particular to an optical detection system with a flange plate type structure.
Background
Due to the manufacturing and installation process, the operation and maintenance environment and the like, insulation defects or even accidents often exist in the SF6 gas insulated electrical equipment. SF6 gas insulated electrical equipment faults can be classified as arcing, spark discharge, partial discharge, and overheating faults. SF6 gas itself is a non-toxic gas, and when SF6 electrical equipment has a fault, SF6 gas and solid insulation in the fault area are cracked under the action of heat and electricity, and sulfide, fluoride, carbide and the like are mainly generated. The generation of SO2 and H2S in the gas chamber is a sign of internal fault, the content of decomposition products of SF6 gas in the gas chamber is detected on site, the internal fault of the SF6 gas insulated electrical equipment can be analyzed preliminarily, and further occurrence and diffusion of accidents are avoided.
However, the insulation gas such as SF6 is easily affected by environmental factors, and the detection error of the optical detection system of the insulation gas in the conventional high-voltage equipment is large due to the zero drift of the related gas detection system.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problems, the present invention provides an optical detection system capable of eliminating detection errors caused by zero drift due to environmental factors and the optical detection system itself, and improving detection accuracy.
The technical scheme of the utility model is as follows:
an optical detection system with a flange plate type structure is used for detecting gas to be detected and comprises a light source, an infrared detector, a prism, a gas detection chamber, an off-axis parabolic mirror, a data acquisition and processing unit and a flange plate, the gas detection chamber is arranged on the flange plate, a first transparent window sheet and a second transparent window sheet are respectively arranged at two ends of the gas detection chamber, the prism comprises a first prism and a second prism, the off-axis paraboloid mirror comprises a first off-axis paraboloid mirror and a second off-axis paraboloid mirror, the first off-axis paraboloidal mirror is connected with the second off-axis paraboloidal mirror through the gas detection chamber, the infrared detectors are arranged on the first prism and the second prism, the pyroelectric sensor is arranged on the gas detection chamber, the optical filter is arranged in the gas detection chamber, and the optical filter divides light beams emitted by the light source into a detection channel and a reference channel.
The light source is arranged at one end of the first off-axis paraboloidal mirror, and the data acquisition and processing unit is arranged at one end of the second off-axis paraboloidal mirror.
After the light beam emitted by the light source passes through the first transparent window sheet and irradiates to the gas to be detected, the light beam is reflected by the second prism, then passes through the first transparent window sheet again and reaches the first off-axis paraboloid mirror, and the light beam is reflected and focused by the first off-axis paraboloid mirror and irradiates to the infrared detector close to the light source.
The optical filter comprises a first optical filter and a second optical filter, wherein the first optical filter and the second optical filter have different central wavelengths, the first optical filter is used for transmitting measured light, and the second optical filter is used for transmitting reference light.
The gas detection chamber is internally provided with a plurality of circular rings, and optical fiber collimators are arranged above the circular rings.
The gas detection chamber is of a cylindrical structure, two ends of the gas detection chamber are both hemispherical, and the inner side of the gas detection chamber is polished and plated with gold.
The light source, the infrared detector, the gas detection chamber, the optical filter, the off-axis parabolic mirror and the data acquisition and processing unit are positioned on the same horizontal axis, and the light source is driven by pulse voltage.
Wherein, the system still includes the rain shade, the rain shade sets up the top of ring flange.
And the position where the rain shade is contacted with the flange plate is sealed by a fluorine rubber gasket.
Wherein, the gas detection chamber is communicated with the gas to be detected in a perforation way.
Compared with the prior art, the utility model has the beneficial effects that: (1) the detection error caused by zero drift caused by environmental factors and an optical detection system can be eliminated, and the detection precision is improved; (2) so that the gas can absorb enough infrared light and reduce sampling errors.
Drawings
Fig. 1 is a schematic diagram illustrating an overall structural front view of an optical detection system of a flange-disk type structure according to an embodiment of the present invention;
reference numerals: the device comprises a light source 1, an infrared detector 2, a first prism 31, a second prism 32, a gas detection chamber 4, a first off-axis parabolic mirror 51, a second off-axis parabolic mirror 52, a data acquisition and processing unit 6, a flange 7, a rain shade 8, a first transparent window sheet 91, a second transparent window sheet 92, a pyroelectric sensor 10, a detection channel 11, a reference channel 12, a first optical filter 131 and a second optical filter 132.
Detailed Description
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
As shown in fig. 1, the present invention provides an optical detection system with a flange-disk structure, which is used for detecting a gas to be detected, wherein the gas to be detected can be SF6, CF4, or HF. The optical detection system of the flange plate type structure comprises a light source 1, an infrared detector 2, a prism, a gas detection chamber 4, an off-axis parabolic mirror, a data acquisition and processing unit 6 and a flange 7, wherein the gas detection chamber 4 is arranged on the flange 7, two ends of the gas detection chamber 4 are respectively provided with a first transparent window sheet 91 and a second transparent window sheet 92, the prism comprises a first prism 31 and a second prism 32, the off-axis parabolic mirror comprises a first off-axis parabolic mirror 51 and a second off-axis parabolic mirror 52, the first off-axis parabolic mirror 51 is connected with the second off-axis parabolic mirror 52 through the gas detection chamber 4, the infrared detector 2 is arranged on the first prism 31 and the second prism 32, the gas detection chamber 4 is provided with a pyroelectric sensor 10, a light filter is arranged inside the gas detection chamber 4, and the light filter divides a light beam emitted by the light source 1 into a detection channel 11 and a reference channel 12.
In the embodiment, the central wavelength of the filter corresponding to the measurement channel is 7.75 μm, the bandwidth of the filter is 180nm, the central wavelength of the filter corresponding to the reference channel is 3.95 μm, and the bandwidth of the filter is 90nm, so that the filter does not absorb other decomposition products of CF4 and SF6 gas, detection errors caused by zero drift due to environmental factors and a system can be eliminated, and the detection precision is improved.
The light source 1 is arranged at one end of a first off-axis parabolic mirror 51 and the data acquisition and processing unit 6 is arranged at one end of a second off-axis parabolic mirror 52.
After a light beam emitted by the light source 1 passes through the first transparent window sheet 91 and irradiates to a gas to be detected, the light beam is reflected by the second prism 32, passes through the first transparent window sheet 91 again and reaches the first off-axis parabolic mirror 51, and is reflected and focused by the first off-axis parabolic mirror 51 and irradiates to the infrared detector 2 close to the light source 1.
The optical filter includes a first optical filter 131 and a second optical filter 132 having different center wavelengths, the first optical filter 131 is used for transmitting the measured light, and the second optical filter 132 is used for transmitting the reference light to detect the light intensity. The infrared detector 2 detects the intensity of the reference light using a pyroelectric detector.
A plurality of circular rings (not shown) are arranged inside the gas detection chamber 4, and a fiber collimator (not shown) is arranged above each circular ring.
The gas detection chamber 4 is of a cylindrical structure, two ends of the gas detection chamber 4 are both hemispheric, and the inner side of the gas detection chamber 4 is polished and plated with gold so as to ensure that the inner wall has enough polishing degree and a light beam can be reversed, so that gas can absorb enough infrared light and sampling errors are reduced.
The light source 1, the infrared detector 2, the gas detection chamber 4, the optical filter, the off-axis parabolic mirror and the data acquisition and processing unit 6 are positioned on the same horizontal axis, and the light source 1 is driven by pulse voltage.
The system further comprises a rain shield 8, the rain shield 8 being arranged above the flange 7.
The contact position of the rain shade and the flange plate is sealed by a fluorine rubber gasket. The rain fly may be made of stainless steel 304.
The gas detection chamber 4 is communicated with the gas to be detected in a perforation way.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (10)
1. An optical detection system with a flange plate type structure is used for detecting a detected gas and is characterized by comprising a light source, an infrared detector, a prism, a gas detection chamber, an off-axis paraboloidal mirror, a data acquisition and processing unit and a flange plate, the gas detection chamber is arranged on the flange plate, a first transparent window sheet and a second transparent window sheet are respectively arranged at two ends of the gas detection chamber, the prism comprises a first prism and a second prism, the off-axis paraboloid mirror comprises a first off-axis paraboloid mirror and a second off-axis paraboloid mirror, the first off-axis paraboloidal mirror is connected with the second off-axis paraboloidal mirror through the gas detection chamber, the infrared detectors are arranged on the first prism and the second prism, the pyroelectric sensor is arranged on the gas detection chamber, the optical filter is arranged in the gas detection chamber, and the optical filter divides light beams emitted by the light source into a detection channel and a reference channel.
2. The system of claim 1, wherein the light source is disposed at one end of the first off-axis parabolic mirror and the data acquisition and processing unit is disposed at one end of the second off-axis parabolic mirror.
3. The system of claim 1, wherein the light beam emitted by the light source passes through the first transparent window sheet to irradiate on the gas to be measured, then passes through the second prism to reflect, then passes through the first transparent window sheet again to reach the first off-axis parabolic mirror, and then is focused by reflection of the first off-axis parabolic mirror to irradiate on the infrared detector close to the light source.
4. The system of claim 3, wherein the optical filter comprises a first optical filter and a second optical filter with different central wavelengths, the first optical filter is used for transmitting the detected light, and the second optical filter is used for transmitting the reference light.
5. The system of claim 1, wherein a plurality of rings are disposed inside the gas detection chamber, and a fiber collimator is disposed above each of the plurality of rings.
6. The system of claim 1, wherein the gas detection chamber is a cylindrical structure, both ends of the gas detection chamber are hemispherical, and the inner side of the gas detection chamber is polished with gold.
7. The system of claim 1, wherein the light source, the infrared detector, the gas detection chamber, the optical filter, the off-axis parabolic mirror, and the data acquisition and processing unit are located on a same horizontal axis, the light source driven by a pulsed voltage.
8. The system of any one of claims 1 to 7, further comprising a rain shield disposed above the flange.
9. The system of claim 8, wherein the rain shield is sealed by a bead of fluoro-elastomer at the location where it contacts the flange.
10. The system of any one of claims 1 to 7, wherein the gas detection chamber is in communication with the gas under test by way of perforations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122325901.6U CN215599003U (en) | 2021-09-24 | 2021-09-24 | Optical detection system of flange plate type structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122325901.6U CN215599003U (en) | 2021-09-24 | 2021-09-24 | Optical detection system of flange plate type structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215599003U true CN215599003U (en) | 2022-01-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122325901.6U Active CN215599003U (en) | 2021-09-24 | 2021-09-24 | Optical detection system of flange plate type structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215599003U (en) |
-
2021
- 2021-09-24 CN CN202122325901.6U patent/CN215599003U/en active Active
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