CN115452262A - Non-refrigeration sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design - Google Patents
Non-refrigeration sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design Download PDFInfo
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- CN115452262A CN115452262A CN202211235148.4A CN202211235148A CN115452262A CN 115452262 A CN115452262 A CN 115452262A CN 202211235148 A CN202211235148 A CN 202211235148A CN 115452262 A CN115452262 A CN 115452262A
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- plane detector
- infrared
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 26
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 24
- 238000001914 filtration Methods 0.000 title claims abstract description 21
- 238000005057 refrigeration Methods 0.000 title abstract description 12
- 238000003860 storage Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 claims description 3
- 230000008542 thermal sensitivity Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 15
- 230000003287 optical effect Effects 0.000 abstract description 4
- 231100001261 hazardous Toxicity 0.000 abstract description 2
- 238000003384 imaging method Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 9
- 230000005855 radiation Effects 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 5
- 238000003331 infrared imaging Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- 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
-
- 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
Abstract
The invention belongs to the technical field of hazardous gas detection, and discloses an uncooled sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design, which comprises a narrow-band optical filter, an infrared filtering lens, an uncooled infrared focal plane detector, a processor, a power supply module, an interface module, a debugging key module and a display, wherein the uncooled sulfur hexafluoride leakage infrared camera device comprises a narrow-band optical filter, a first infrared focal plane detector, a second infrared focal plane detector, a processor, a power supply module, a debugging key module and a display; the narrow-band filter, the infrared filter lens and the uncooled infrared focal plane detector are sequentially connected, and the processor is respectively electrically connected with the uncooled infrared focal plane detector, the power supply module, the interface module, the debugging key module and the display. The non-refrigeration sulfur hexafluoride leakage infrared camera device based on the narrow-band filtering design adopts a non-refrigeration infrared focal plane detector and a narrow-band optical filter, and simultaneously combines a vacuum design to realize high-sensitivity imaging of sulfur hexafluoride gas; through adopting uncooled infrared focal plane detector, the device can work at normal temperature, need not the refrigeration, and inside each components and parts integration casing again, the device is small, easily carries.
Description
Technical Field
The invention belongs to the technical field of hazardous gas detection, and particularly relates to an uncooled sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design.
Background
Sulfur Hexafluoride gas (SF 6) is widely used in the high-voltage electrical industry as an arc extinguishing and insulating medium. But due to equipment production process, welding quality, external disturbances, etc., SF 6 The gas leakage being SF 6 A frequently occurring phenomenon in electrical equipment, leaking SF 6 The gas has serious adverse consequences, so SF develops 6 The gas leakage detection research work has important significance. The gas leakage infrared imaging detection technology has the advantages of non-contact, high safety, no need of power failure detection and the like, and is widely applied to dangerous gas leakage detection. In recent years, research on infrared imaging gas leakage detection systems at home and abroad has been greatly developed, and most detection systems take a refrigeration type detector as a core, and realize effective detection of gas leakage by judging characteristic difference of leakage points relative to background radiation. Such as SF utilized by FLIR Inc. in the United states 6 The GF306 thermal infrared imager can capture SF in real time 6 Leak video images, and can capture minute amounts of SF 6 And (4) leakage. The instrument can directly observe SF 6 Determination of SF from leaking video image 6 Compared with the traditional detection method, the leakage point of the device has the advantages of no power failure, low risk and the like, so that the infrared gas leak detector is held by hand to SF 6 Detection of leakage is becoming increasingly a major means of power inspection.
In the process of power inspection, the infrared imaging gas leakage detector is widely applied. However, most of the conventional gas leakage detectors are based on a refrigeration type focal plane infrared detector, are expensive and inconvenient to carry, and cannot be widely popularized. In addition, the refrigeration type thermal infrared imager needs low-temperature refrigeration during working, and cannot normally work in hot weather, and the sensitivity of the thermal infrared imager is greatly influenced by temperature.
Disclosure of Invention
The invention aims to provide an uncooled sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design, which directly observes SF 6 Determination of SF from leaking video image 6 The leakage point of the equipment has high detection precision and sensitivity and is not influenced by temperature.
In order to achieve the purpose, the invention provides an uncooled sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design, which comprises a narrow-band filter, an infrared filtering lens, an uncooled infrared focal plane detector, a processor, a power supply module, an interface module, a debugging key module and a display, wherein the uncooled sulfur hexafluoride leakage infrared camera device comprises a narrow-band filter, a narrow-band infrared focal plane detector, a narrow-band filter, a narrow-band processor, a narrow-band debugging key module and a narrow-band display; the narrow-band filter, the infrared filter lens and the uncooled infrared focal plane detector are sequentially connected, and the processor is respectively electrically connected with the uncooled infrared focal plane detector, the power supply module, the interface module, the debugging key module and the display.
As a further technical improvement, the device also comprises a shell, wherein a narrow-band filter, an infrared filter lens and a non-refrigeration infrared focal plane detector are respectively arranged on one side of the shell, and a display is arranged on the other side of the shell; the processor, the power supply module and the interface module are arranged in the shell, the shell is provided with an interface through groove, and one end of the interface module penetrates through the interface through groove and extends out of the shell; and a debugging key module is arranged at the bottom of the display.
As a further technical improvement, the uncooled infrared focal plane detector and the shell are packaged in vacuum; the uncooled infrared focal plane detector comprises a heat sensor and a reading circuit; the thermal sensor is electrically connected with the readout circuit.
As a further technical improvement, the uncooled infrared focal plane detector includes a microbolometer; the outside of microbolometer is equipped with the heat insulating ring, the heat insulating ring is used for reducing the heat conduction between microbolometer and its surrounding environment.
As a further technical improvement, the power supply module comprises a storage battery, a voltage stabilizing module and an external charger; a power switch is arranged between the storage battery and the voltage stabilizing module; the storage battery is provided with a charging interface matched with an external charger.
As a further technical improvement, the area array specification of the uncooled infrared focal plane detector is larger than 640 multiplied by 512mm.
As a further technical improvement, the frame frequency of the uncooled infrared focal plane detector is 50Hz.
As a further technical improvement, the uncooled infrared focal plane detector has a thermal sensitivity of less than 25mK.
As a further technical improvement, the uncooled infrared focal plane detector has a thermal response time of less than 25ms and a response spectrum of 10-11 μm.
As a further technical improvement, the transmission waveband of the narrow-band filter is 10.56 μm.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to an uncooled sulfur hexafluoride leakage infrared camera device designed based on narrow-band filtering, which adopts an uncooled infrared focal plane detector and a narrow-band optical filter to realize high-sensitivity imaging of sulfur hexafluoride gas; the uncooled infrared focal plane detector can work at normal temperature without refrigeration, is sealed and reliable by adopting a vacuum design, effectively improves the transmittance of an infrared window, integrates all components in the shell, and has small volume and easy carrying.
Drawings
In order to illustrate the embodiments of the invention more clearly, reference will now be made to the appended drawings, which are needed for an embodiment of the invention and from which it will be apparent that only some embodiments of the invention are shown and that other drawings may be derived by those skilled in the art without the inventive faculty.
FIG. 1 is a block diagram of the present invention.
FIG. 2 is SF 6 Gas infrared absorption spectroscopy;
FIG. 3 is SF 6 Passive infrared imaging principle.
The attached drawings are as follows: the system comprises a processor 1, a narrow-band filter 2, an infrared filter lens 3, an uncooled infrared focal plane detector 4, a display 5, a voltage stabilizing module 6, a power switch 7, a storage battery 8, an external charger 9, a debugging key module 10 and an interface module 11.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be carried into practice or applied to various other specific embodiments, and various modifications and changes may be made in the details within the description and the drawings without departing from the spirit of the disclosure. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Examples
As shown in fig. 1-3, the present embodiment provides a device including a narrowband filter, an infrared filter lens, an uncooled infrared focal plane detector, a processor, a power module, an interface module, a debugging key module, and a display; the narrow-band filter, the infrared filter lens and the uncooled infrared focal plane detector are sequentially connected, and the processor is respectively electrically connected with the uncooled infrared focal plane detector, the power supply module, the interface module, the debugging key module and the display.
The temperature change of the heat sensor after receiving the infrared radiation of the target is very weak, and the heat sensor needs to be placed in a vacuum environment to work in order to maintain the heat on the heat sensor and avoid heat exchange with air molecules. The requirements for the vacuum packaging of the uncooled infrared focal plane detector are as follows: excellent and reliable sealing performance, high transmittance of infrared window, high yield and low cost.
The device is characterized by further comprising a shell, wherein a narrow-band filter, an infrared filter lens and a non-refrigeration infrared focal plane detector are arranged on one side of the shell respectively, and a display is arranged on the other side of the shell; the processor, the power supply module and the interface module are arranged in the shell, the shell is provided with an interface through groove, and one end of the interface module penetrates through the interface through groove and extends out of the shell; and a debugging key module is arranged at the bottom of the display.
The uncooled infrared focal plane detector and the shell are packaged in vacuum; the uncooled infrared focal plane detector comprises a heat sensor and a reading circuit; the thermal sensor is electrically connected with the readout circuit. The readout circuit is provided with a compensation circuit for inhibiting the pixel output signal from drifting along with the temperature.
The uncooled infrared focal plane detector comprises a microbolometer; the outer side of the microbolometer is provided with a heat insulation ring, and the heat insulation ring is used for reducing heat conduction between the microbolometer and the surrounding environment; the effective absorption area of the microbolometer for infrared radiation is as large as possible so as to obtain higher infrared radiation absorption rate; the selected thermal sensitive material needs to have a high Temperature Coefficient of Resistance (TCR), as low a 1/f noise as possible, and as small a thermal time constant as possible.
The power supply module comprises a storage battery, a voltage stabilizing module and an external charger; a power switch is arranged between the storage battery and the voltage stabilizing module; the storage battery is provided with a charging interface matched with an external charger. The storage battery adopts a 12V power supply. The interface module includes a DB9 interface.
The outer surface of the shell is provided with a black coating. The area array specification of the uncooled infrared focal plane detector is larger than 640 multiplied by 512mm. The frame frequency of the uncooled infrared focal plane detector is 50Hz. The thermal sensitivity (NETD) of the uncooled infrared focal plane detector is less than 25mK. The thermal response time of the uncooled infrared focal plane detector is less than 25ms, and the response spectrum is (10-11) mu m. The transmission waveband of the narrow-band filter is (10.56 mu m). The corners of the shell are in arc transition.
This embodiment focuses on the rapid detection of the presence of SF6 gas and the accurate location of the leakage source, and is a qualitative detection. Therefore, the qualitative detection of SF6 gas leakage can be realized by combining the narrow-band filter. Filters having cut-off regions on both sides of the transmission band of the spectral characteristic curve are called bandpass filters, and are classified into a broadband filter and a narrowband filter according to spectral characteristics. The narrow-band filter can realize the selection of a specific spectral band, and although the narrow-band filter reduces the total radiant quantity received by the detector and reduces the signal-to-noise ratio of the system, the narrow-band filter greatly improves the percentage of the radiant quantity absorbed by the gas in the total radiant quantity received by the detector, so that the system has higher overall sensitivity. The main characteristic parameters of the bandpass filter are shown in the following table:
TABLE 1 main characteristic parameters of bandpass filter
According to the above table, the narrowband filter should be manufactured by considering the following points:
(1) The transmission band of the narrow band filter is (10.56 μm), and therefore parameters such as the peak wavelength, the transmittance, the peak transmittance, the half width, and the like are designed correspondingly according to the actual application requirements.
(2) The narrow-band filter adopts higher transmittance in a transmission waveband, thereby reducing the attenuation of radiation transmission in a light path as much as possible and effectively filtering ineffective radiation in other wavebands.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An uncooled sulfur hexafluoride leakage infrared camera device designed based on narrow-band filtering is characterized by comprising a narrow-band filter, an infrared filter lens, an uncooled infrared focal plane detector, a processor, a power supply module, an interface module, a debugging key module and a display, wherein the uncooled sulfur hexafluoride leakage infrared camera device comprises a narrow-band filter, a narrow-band filter lens, a uncooled infrared focal plane detector, a processor, a power supply module, a debugging key module and a display; the narrow-band filter, the infrared filter lens and the uncooled infrared focal plane detector are sequentially connected, and the processor is respectively electrically connected with the uncooled infrared focal plane detector, the power supply module, the interface module, the debugging key module and the display.
2. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrow band filtering of claim 1, further comprising a housing, wherein one side of the housing is respectively provided with a narrow band filter, an infrared filter lens and an uncooled infrared focal plane detector, and the other side is provided with a display; the processor, the power supply module and the interface module are arranged in the shell, the shell is provided with an interface through groove, and one end of the interface module penetrates through the interface through groove and extends out of the shell; and a debugging key module is arranged at the bottom of the display.
3. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrow band filtering of claim 1, wherein the uncooled infrared focal plane detector and the housing are vacuum-sealed; the uncooled infrared focal plane detector comprises a heat sensor and a reading circuit; the thermal sensor is electrically connected with the readout circuit.
4. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrowband filtering of claim 1, wherein the uncooled infrared focal plane detector includes a microbolometer; the outside of microbolometer is equipped with the heat insulating ring, the heat insulating ring is used for reducing the heat conduction between microbolometer and its surrounding environment.
5. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrow band filtering of claim 1, wherein the power module includes a storage battery, a voltage regulation module and an external charger; a power switch is arranged between the storage battery and the voltage stabilizing module; the storage battery is provided with a charging interface matched with an external charger.
6. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrow band filtering of claim 1, wherein the uncooled infrared focal plane detector has an area array size greater than 640 x 512mm.
7. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrow band filtering of claim 1, wherein the uncooled infrared focal plane detector has a frame frequency of 50Hz.
8. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrow band filtering of claim 1, wherein the uncooled infrared focal plane detector has a thermal sensitivity of less than 25mK.
9. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrow band filtering of claim 1, wherein the uncooled infrared focal plane detector has a thermal response time of less than 25ms and a response spectrum of 10-11 μm.
10. The uncooled sulfur hexafluoride leakage infrared camera apparatus designed based on narrowband filtering of claim 1, wherein the transmission band of the narrowband filter is 10.56 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211235148.4A CN115452262A (en) | 2022-10-10 | 2022-10-10 | Non-refrigeration sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211235148.4A CN115452262A (en) | 2022-10-10 | 2022-10-10 | Non-refrigeration sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design |
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| Publication Number | Publication Date |
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| CN115452262A true CN115452262A (en) | 2022-12-09 |
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| CN202211235148.4A Pending CN115452262A (en) | 2022-10-10 | 2022-10-10 | Non-refrigeration sulfur hexafluoride leakage infrared camera device based on narrow-band filtering design |
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| CN (1) | CN115452262A (en) |
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- 2022-10-10 CN CN202211235148.4A patent/CN115452262A/en active Pending
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