CN111157479A - Light-splitting infrared imaging monitoring device and method for VOC gas leakage - Google Patents
Light-splitting infrared imaging monitoring device and method for VOC gas leakage Download PDFInfo
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Abstract
The invention discloses a light-splitting infrared imaging monitoring device for VOC gas leakage, which comprises: the infrared imaging system comprises an infrared lens, an infrared light splitting element, a long-wave-pass infrared filter, a first infrared focal plane detector, a second infrared focal plane detector, an infrared image processing module and a display module; the infrared lens receives scene infrared radiation and outputs the scene infrared radiation to the infrared light splitting element; the infrared light splitting element outputs a first path of infrared radiation and a second path of infrared radiation, the first path of infrared radiation is output to a first infrared focal plane detector through a long-wave-pass infrared filter, and the second path of infrared radiation is output to a second infrared focal plane detector; the output ends of the first infrared focal plane detector and the second infrared focal plane detector are connected to the infrared image processing module; the cut-off edge of the long-wave pass infrared filter is 3.3-3.7 μm. The invention also provides a spectral infrared imaging monitoring method for VOC gas leakage, which has high sensitivity for monitoring VOC gas leakage and can quickly position the leakage position.
Description
Technical Field
The invention relates to a VOC gas leakage monitoring system, in particular to a monitoring device and a monitoring method for VOC gas leakage in the petrochemical industry.
Background
The method is used as the prop industry of national economy in the petrochemical industry, provides necessary petroleum energy and chemical products for social development, and also belongs to key industrial pollution sources. The air pollution is mainly in an unorganized emission form, and the pollutants are mainly various high-concentration volatile organic gases (VOC), so that great harm is brought to the ecological environment and human health. How to rapidly monitor the existence of VOC gas leakage, effectively evaluate the distribution state and diffusion trend of the leaked gas in the space, and accurately position the gas leakage source, so that relevant departments and personnel can rapidly take effective measures to prevent the occurrence of major gas leakage accidents is a problem which needs to be solved urgently.
Due to the contact principle, a plurality of target sites to be detected cannot reach the traditional VOC gas sensor, and the operation safety of the traditional VOC gas sensor is greatly reduced. Considering that most industrial harmful gases have characteristic absorption spectra in a medium-wave infrared band, a spectrum detection technology based on a gas infrared absorption principle becomes a quick and effective VOC gas leakage non-contact detection technology, but a traditional detection method also belongs to fixed-point measurement and is difficult to adapt to large-scale dynamic detection.
In recent years, the infrared imaging monitoring technology for gas leakage has become a research hotspot in all countries around the world due to its remarkable advantages of high efficiency, long distance, wide range, dynamic intuition, etc., and has gradually become an important means for monitoring gas leakage. Gas leakage infrared imaging detection techniques can be largely classified into two major categories, active imaging based on absorption of laser source radiation and passive imaging based on absorption of background radiation. The gas leakage laser active infrared imaging detection technology has the advantages that due to the existence of radiation sources such as laser and the like, the system is generally large in volume and weight, relatively low in safety, limited by a laser light source, limited in detectable spectral range, few in detectable gas types, and rapidly weakened in signal along with the distance, most of the currently applied systems need a scanning mechanism, and the systems are relatively complex. The VOC gas leakage passive infrared imaging monitoring technology has the advantages of remarkable remote detection capability, large detectable spectral range, multiple detectable gas types, no background reflection and radiation source required by a system, relatively simple structure, adoption of an array detector, direct imaging and positioning, relative temperature difference between the detected gas and the background, poor signal-to-noise ratio, need of special optical structure optimization, image enhancement and other processing technologies. Common typical passive imaging monitoring technologies for VOC gas leakage mainly include a simple infrared thermal imaging monitoring technology, a multispectral imaging monitoring technology and a hyperspectral imaging monitoring technology. The simple infrared imaging VOC monitoring technology is realized by adding a narrow-band filter matched with the VOC gas infrared spectrum in an optical system of a single infrared camera, and the technical means reduces the signal-to-noise ratio of the monitoring system, thereby reducing the sensitivity of the VOC gas imaging monitoring system. The multispectral imaging technology and the hyperspectral imaging technology can obtain the fine spectrum of the VOC gas, but the multispectral imaging technology and the hyperspectral imaging technology are expensive, long in scanning time, poor in real-time performance and large in size.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a light-splitting type infrared imaging monitoring device and a light-splitting type infrared imaging monitoring method for VOC gas leakage, according to the fact that the VOC gas has strong absorption characteristics at the infrared wavelength near 3.3 mu m, scene infrared radiation is divided into two paths of transmission infrared radiation and reflection infrared radiation by an infrared light-splitting element, difference processing is carried out on the two paths of infrared images to detect the VOC gas leakage, the sensitivity of monitoring the VOC gas leakage is improved, and the positioning is fast and accurate.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
towards spectral type infrared imaging monitoring devices of VOC gas leakage, include:
the infrared imaging system comprises an infrared lens, an infrared light splitting element, a long-wave-pass infrared filter, a first infrared focal plane detector, a second infrared focal plane detector, an infrared image processing module and a display module;
the infrared lens receives scene infrared radiation and outputs the scene infrared radiation to the infrared light splitting element; the infrared light splitting element outputs a first path of infrared radiation and a second path of infrared radiation, the first path of infrared radiation is output to a first infrared focal plane detector through a long-wave-pass infrared filter, and the second path of infrared radiation is output to a second infrared focal plane detector; the output ends of the first infrared focal plane detector and the second infrared focal plane detector are connected to the infrared image processing module; the output end of the infrared image processing module is connected with the display module; the cut-off edge of the long-wave pass infrared filter is 3.3-3.7 mu m.
As a preferred embodiment of the present invention: the first path of infrared radiation is transmitted infrared radiation of the infrared light splitting element, and the second path of infrared radiation is reflected infrared radiation of the infrared light splitting element.
As a preferred embodiment of the present invention: the first path of infrared radiation is reflected infrared radiation of the infrared light splitting element, and the second path of infrared radiation is transmitted infrared radiation of the infrared light splitting element.
Preferably: the cut-off edge of the long-wave pass infrared filter is 3.5 mu m.
As a preferred embodiment of the present invention: the infrared light splitting element is any one of an infrared light splitting sheet, an infrared beam splitter and an infrared light splitting prism.
As a preferred embodiment of the present invention: the first infrared focal plane detector and the second infrared focal plane detector adopt any one of a non-refrigeration type medium wave infrared focal plane detector, a non-refrigeration type broad spectrum infrared focal plane detector and a refrigeration type broad spectrum infrared focal plane detector.
A spectral infrared imaging monitoring method for VOC gas leakage comprises the following steps:
the infrared lens receives scene infrared radiation and transmits the scene infrared radiation to the infrared light splitting element;
the infrared light splitting element divides the infrared radiation into two paths of transmission infrared radiation and reflection infrared radiation, wherein one path of transmission infrared radiation and reflection infrared radiation is transmitted to a first infrared focal plane detector through a long-wave infrared filter, and the second path of transmission infrared focal plane detector is transmitted to a second infrared focal plane detector;
the first infrared focal plane detector and the second infrared focal plane detector respectively acquire a first path of infrared image and a second path of infrared image and transmit the first path of infrared image and the second path of infrared image to the infrared image processing module;
the infrared image processing module processes the first path of infrared image and the second path of infrared image, determines the position of VOC gas leakage, and displays the processed infrared images through the display module.
As a preferred embodiment of the present invention: the infrared light splitting element splits infrared radiation into two paths of transmission infrared radiation and reflection infrared radiation, and the long-wave-pass infrared filter is arranged on a light path of the transmission infrared radiation.
Further, the long-wave pass infrared filter is arranged on a light path for reflecting infrared radiation.
The further technical scheme of the invention is as follows: the infrared image processing module is used for carrying out image processing on the first path of infrared image and the second path of infrared image and determining the position of VOC gas leakage; the method specifically comprises the following steps:
respectively carrying out non-uniform correction processing on the first path of infrared image and the second path of infrared image;
registering the corrected first path of infrared image and the second path of infrared image to obtain a registered image;
carrying out difference processing on the registration image to obtain a difference image;
locating the position of VOC gas leakage in the differential image;
the VOC gas leak area in the differential image is determined and marked.
The invention has the beneficial effects that:
according to the invention, the VOC gas has strong absorption characteristic at the infrared wavelength near 3.3 mu m, the infrared light splitting element is utilized to split scene infrared radiation into two paths of transmission infrared radiation and reflection infrared radiation, and the two paths of infrared images are subjected to differential processing to detect VOC gas leakage, so that the VOC gas leakage monitoring device has the advantages of high sensitivity and rapid positioning of leakage position.
Drawings
Fig. 1 is a structural diagram of an embodiment of a spectroscopic infrared imaging monitoring device for VOC gas leakage according to the present invention;
fig. 2 is a structural diagram of an embodiment of the spectroscopic infrared imaging monitoring device for VOC gas leakage according to the present invention;
FIG. 3 is a flow chart of the spectral infrared imaging monitoring method for VOC gas leakage according to the present invention;
FIG. 4 is a flow chart of an infrared image processing module according to the present invention;
fig. 5 is a schematic processing flow diagram of an infrared image processing module according to the present invention.
Description of reference numerals:
101-infrared radiation, 102-an infrared lens, 103-an infrared beam splitter, 104-a long-wave-pass infrared filter, 105-a first infrared focal plane detector, 106-a second infrared focal plane detector, 107-an infrared image processing module and 108-a display module.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
The principle of the invention is as follows:
according to the invention, the VOC gas has strong absorption characteristic at the infrared wavelength near 3.3 mu m, and the VOC gas leakage becomes visible through the imaging of the light-splitting two-way infrared focal plane detector and the advanced infrared image processing technology. The invention utilizes an infrared light splitting element to divide the infrared radiation of a monitored scene into two paths, wherein one path is provided with a long-wave-pass infrared filter with a cut-off edge within the range of 3.3-3.7 mu m, and the other path is not provided with the long-wave-pass infrared filter. The light path without the long-wave pass infrared filter is affected by VOC gas absorption, and the long-wave pass infrared filter is arranged in the light path to remove the effect of VOC gas absorption. When VOC gas leakage occurs in a monitored scene, the two paths of infrared images are subjected to differential processing, and the position of the VOC gas leakage is highlighted, so that the position of the VOC gas leakage source can be quickly and accurately positioned.
Example one
Referring to fig. 1, a structural diagram of a spectroscopic infrared imaging monitoring device for VOC gas leakage according to an embodiment of the present invention is shown;
as shown in fig. 1, the spectroscopic infrared imaging monitoring device for VOC gas leakage according to the present invention includes: the system comprises an infrared lens 102, an infrared light splitting element 103, a long-wave-pass infrared filter 104, a first infrared focal plane detector 105, a second infrared focal plane detector 106, an infrared image processing module 107 and a display module 108;
the infrared lens 102 receives scene infrared radiation 101 and outputs the scene infrared radiation to the infrared spectroscopic element 103, the infrared spectroscopic element 103 outputs a first path of transmission infrared radiation and a second path of reflection infrared radiation, the first path of transmission infrared radiation is output to a first infrared focal plane detector 105 through the long-wave pass infrared filter 104, the second path of reflection infrared radiation is output to a second infrared focal plane detector 106, and output ends of the first infrared focal plane detector 105 and the second infrared focal plane detector 106 are connected to the infrared image processing module 107; the output end of the infrared image processing module 107 is connected with the display module 108; the cut-off edge of the long-wave pass infrared filter 104 is in the range of 3.3-3.7 μm.
In the embodiment of the invention, the cut-off edge of the long-wave pass infrared filter 104 is within the range of 3.3-3.7 μm. Preferably, the cut-off edge of the long-wave pass infrared filter 104 is 3.5 μm. Because the VOC gas has an absorption peak near the wavelength of 3.3 mu m, the light path without adding the long-wave-pass infrared filter is influenced by the absorption of the VOC gas, and the addition of the long-wave-pass infrared filter in the light path is equivalent to the removal of the influence of the absorption of the VOC gas. When VOC gas leakage occurs in a monitored scene, the two paths of infrared images are subjected to differential processing, and the position of the VOC gas leakage is highlighted, so that the position of the VOC gas leakage source can be quickly and accurately positioned.
The signal transmission process of the embodiment of the invention is as follows: firstly, an infrared light splitting element 103 is utilized to divide monitored scene infrared radiation 101 transmitted by an infrared lens 102 into two paths of transmission infrared radiation and reflection infrared radiation; secondly, after a long-wave pass infrared filter 104 with a cut-off edge within the range of 3.3-3.7 mu m is arranged behind a transmission infrared radiation light path, two paths of infrared radiation respectively enter two infrared focal plane detectors; and finally, the infrared image processing module is used for correcting, registering and differentiating the two infrared images output by the two infrared focal plane detectors, carrying out gas positioning, detection and marking on the differential images, and transmitting the processed images to a display for display processing.
The infrared splitting element 103 is any one of an infrared splitter, an infrared beam splitter and an infrared splitting prism.
The first infrared focal plane detector 105 and the second infrared focal plane detector 106 adopt any one of a non-refrigeration type medium wave infrared focal plane detector, a non-refrigeration type broad spectrum infrared focal plane detector and a refrigeration type broad spectrum infrared focal plane detector.
In the embodiment of the invention, the infrared lens 102 can be a medium wave infrared lens; the infrared light splitting element 103 is an infrared light splitting sheet with a CaF2 substrate, wherein the light splitting ratio is 50:50, and the working wavelength range is 2.0-8.0 μm. The first infrared focal plane detector 105 and the second infrared focal plane detector 106 can be non-refrigeration type medium wave infrared focal plane detectors with pixel arrays of 384 multiplied by 288 and response wave bands of 3-5 mu m; the display module 108 may employ a liquid crystal display.
Example two
Referring to fig. 2, a structural diagram of an embodiment of the spectroscopic infrared imaging monitoring device for VOC gas leakage according to the present invention is shown;
as shown in fig. 2, the spectroscopic infrared imaging monitoring device for VOC gas leakage proposed by the present invention includes: the system comprises an infrared lens 102, an infrared light splitting element 103, a long-wave-pass infrared filter 104, a first infrared focal plane detector 105, a second infrared focal plane detector 106, an infrared image processing module 107 and a display module 108;
the infrared lens 102 receives scene infrared radiation 101 and outputs the scene infrared radiation to the infrared light splitting element 103, the infrared light splitting element 103 outputs a first path of transmission infrared radiation and a second path of reflection infrared radiation, the first path of transmission infrared radiation is output to a first infrared focal plane detector 105, and the second path of reflection infrared radiation is output to a second infrared focal plane detector 106 through the long-wave pass infrared filter 104; the output ends of the first infrared focal plane detector 105 and the second infrared focal plane detector 106 are connected to an infrared image processing module 107; the output end of the infrared image processing module 107 is connected with the display module 108; the cut-off edge of the long-wave pass infrared filter 104 is in the range of 3.3-3.7 μm.
In the embodiment of the invention, the cut-off edge of the long-wave pass infrared filter 104 is within the range of 3.3-3.7 μm. Preferably, the cut-off edge of the long-wave pass infrared filter 104 is 3.5 μm. Because the VOC gas has an absorption peak near the wavelength of 3.3 mu m, the light path without adding the long-wave-pass infrared filter is influenced by the absorption of the VOC gas, and the addition of the long-wave-pass infrared filter in the light path is equivalent to the removal of the influence of the absorption of the VOC gas. When VOC gas leakage occurs in a monitored scene, the two paths of infrared images are subjected to differential processing, and the position of the VOC gas leakage is highlighted, so that the position of the VOC gas leakage source can be quickly and accurately positioned.
The signal transmission process of the embodiment of the invention is as follows: firstly, an infrared light splitting element 103 is utilized to divide monitored scene infrared radiation 101 transmitted by an infrared lens 102 into two paths of transmission infrared radiation and reflection infrared radiation; after a long-wave pass infrared filter 104 with a cut-off edge within the range of 3.3-3.7 mu m is arranged in a reflected infrared radiation light path, two paths of infrared radiation respectively enter two infrared focal plane detectors; and finally, the infrared image processing module is used for correcting, registering and differentiating the two infrared images output by the two infrared focal plane detectors, carrying out gas positioning, detection and marking on the differential images, and transmitting the processed images to a display for display processing.
The infrared splitting element 103 is any one of an infrared splitter, an infrared beam splitter and an infrared splitting prism.
The first infrared focal plane detector 105 and the second infrared focal plane detector 106 adopt any one of a non-refrigeration type medium wave infrared focal plane detector, a non-refrigeration type broad spectrum infrared focal plane detector and a refrigeration type broad spectrum infrared focal plane detector.
In the embodiment of the invention, the infrared lens 102 can be a medium wave infrared lens; the infrared light splitting element 103 is a ZnSe infrared light splitting sheet of Edmund Optics, wherein the light splitting ratio is 50:50, and the working wavelength range is 2-20 μm. The first infrared focal plane detector 105 and the second infrared focal plane detector 106 can be non-refrigeration type medium wave infrared focal plane detectors with pixel arrays of 384 multiplied by 288 and response wave bands of 3-5 mu m; the display module can adopt a liquid crystal display screen.
EXAMPLE III
Referring to fig. 3, it is a flow chart of the spectroscopic infrared imaging monitoring method for VOC gas leakage according to the present invention. The VOC gas leakage-oriented spectroscopic infrared imaging monitoring method comprises the following steps:
202, dividing infrared radiation into two paths of transmitted infrared radiation and reflected infrared radiation by the infrared light splitting element 103, and after a long-wave pass infrared filter 104 is arranged in any one of the two paths of light paths, respectively transmitting the two paths of infrared radiation to the first infrared focal plane detector 105 and the second infrared focal plane detector 106;
and step 204, the infrared image processing module 107 processes the first path of infrared image and the second path of infrared image, determines the VOC gas leakage position, and displays the processed images through the display module 108.
In the embodiment of the present invention, the purpose of the long-wave pass infrared filter 104 is to generate two paths of infrared radiation including different VOC absorption characteristics, the infrared splitting element 103 splits the infrared radiation into transmitted infrared radiation and reflected infrared radiation, and the long-wave pass infrared filter 104 is disposed in the optical path of the transmitted infrared radiation.
As another embodiment of the present invention, a long-wave pass infrared filter 104 is disposed in the optical path of the reflected infrared radiation.
Referring to fig. 4 and 5, fig. 4 is a flowchart illustrating a processing of an infrared image processing module according to the present invention; fig. 5 is a schematic processing flow diagram of an infrared image processing module according to the present invention.
As shown in fig. 4 and 5, the infrared image processing module processes the first path of infrared image and the second path of infrared image to determine the VOC leaked gas position; the method specifically comprises the following steps:
241, respectively carrying out non-uniform correction processing on the first path of infrared image and the second path of infrared image;
and step 245, determining and marking the VOC gas leakage area in the differential image.
In the embodiment of the present invention, various changes and specific examples of the spectroscopic infrared imaging monitoring apparatus for VOC gas leakage are also applicable to the spectroscopic infrared imaging monitoring method for VOC gas leakage of the embodiment, and through the foregoing detailed description of the spectroscopic infrared imaging monitoring apparatus for VOC gas leakage, those skilled in the art can clearly know the spectroscopic infrared imaging monitoring method for VOC gas leakage of the embodiment, so for the brevity of the description, detailed description is not provided here.
While the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes, which relate to the related art known to those skilled in the art and fall within the scope of the present invention, can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (10)
1. The utility model provides a towards spectral type infrared imaging monitoring devices of VOC gas leakage which characterized in that includes:
the infrared imaging system comprises an infrared lens, an infrared light splitting element, a long-wave-pass infrared filter, a first infrared focal plane detector, a second infrared focal plane detector, an infrared image processing module and a display module;
the infrared lens receives scene infrared radiation and outputs the scene infrared radiation to the infrared light splitting element; the infrared light splitting element outputs a first path of infrared radiation and a second path of infrared radiation, the first path of infrared radiation is output to a first infrared focal plane detector through a long-wave-pass infrared filter, and the second path of infrared radiation is output to a second infrared focal plane detector; the output ends of the first infrared focal plane detector and the second infrared focal plane detector are connected to the infrared image processing module; the output end of the infrared image processing module is connected with the display module; the cut-off edge of the long-wave pass infrared filter is 3.3-3.7 mu m.
2. The spectroscopic infrared imaging monitoring device for VOC gas leakage according to claim 1, wherein the first path of infrared radiation is transmitted infrared radiation of an infrared spectroscopic element, and the second path of infrared radiation is reflected infrared radiation of the infrared spectroscopic element.
3. The spectroscopic infrared imaging monitoring device for VOC gas leakage according to claim 1, wherein the first path of infrared radiation is reflected infrared radiation of an infrared spectroscopic element, and the second path of infrared radiation is transmitted infrared radiation of the infrared spectroscopic element.
4. The spectroscopic infrared imaging monitoring device for VOC gas leakage facing the claim 1, wherein the cut-off edge of the long wave pass infrared filter is at 3.5 μm.
5. The spectroscopic infrared imaging monitoring device for VOC gas leakage according to claim 1, wherein the infrared spectroscopic element is any one of an infrared spectroscope, an infrared beam splitter, and an infrared beam splitter prism.
6. The spectroscopic infrared imaging monitoring device for VOC gas leakage of claim 1, wherein the first infrared focal plane detector and the second infrared focal plane detector are any one of a non-refrigeration type medium wave infrared focal plane detector, a non-refrigeration type broad spectrum infrared focal plane detector and a refrigeration type broad spectrum infrared focal plane detector.
7. The spectroscopic infrared imaging monitoring device for VOC gas leakage of claim 1, which provides a spectroscopic infrared imaging monitoring method for VOC gas leakage, comprising the following steps:
the infrared lens receives scene infrared radiation and transmits the scene infrared radiation to the infrared light splitting element;
the infrared light splitting element divides the infrared radiation into two paths of transmission infrared radiation and reflection infrared radiation, wherein the first path is transmitted to a first infrared focal plane detector through a long-wave infrared filter, and the second path is transmitted to a second infrared focal plane detector;
the first infrared focal plane detector and the second infrared focal plane detector respectively acquire a first path of infrared image and a second path of infrared image and transmit the first path of infrared image and the second path of infrared image to the infrared image processing module;
the infrared image processing module processes the first path of infrared image and the second path of infrared image, determines the position of VOC gas leakage, and displays the processed infrared images through the display module.
8. The spectroscopic monitoring device for VOC gas leakage-oriented infrared imaging according to claim 7, wherein said infrared spectroscopic element separates the infrared radiation into two paths of transmitted infrared radiation and reflected infrared radiation, and the long-pass infrared filter is disposed on the path of the transmitted infrared radiation.
9. The spectroscopic monitoring device for VOC gas leak-oriented infrared imaging according to claim 7, wherein said long-pass infrared filter is disposed in the path of reflected infrared radiation.
10. The spectral infrared imaging monitoring device for VOC gas leakage of claim 7, wherein said infrared image processing module performs image processing on the first path of infrared image and the second path of infrared image to determine the position of VOC gas leakage; the method specifically comprises the following steps:
respectively carrying out non-uniform correction processing on the first path of infrared image and the second path of infrared image;
registering the corrected first path of infrared image and the second path of infrared image to obtain a registered image;
carrying out difference processing on the registration image to obtain a difference image;
locating the position of VOC gas leakage in the differential image;
the VOC gas leak area in the differential image is determined and marked.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304434A (en) * | 2020-09-25 | 2021-02-02 | 西北工业大学 | Non-refrigeration type medium-long wave dual-waveband infrared imaging device and method |
| CN113406035A (en) * | 2021-05-31 | 2021-09-17 | 浙江焜腾红外科技有限公司 | Imaging sensor structure for VOC gas emission |
| CN113418887A (en) * | 2021-05-31 | 2021-09-21 | 浙江焜腾红外科技有限公司 | Imaging optical system for VOC gas emission |
| CN117233119A (en) * | 2023-11-10 | 2023-12-15 | 北京环拓科技有限公司 | Method for identifying and quantifying VOC (volatile organic compound) gas cloud image by combining sensor calibration module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304434A (en) * | 2020-09-25 | 2021-02-02 | 西北工业大学 | Non-refrigeration type medium-long wave dual-waveband infrared imaging device and method |
| CN113406035A (en) * | 2021-05-31 | 2021-09-17 | 浙江焜腾红外科技有限公司 | Imaging sensor structure for VOC gas emission |
| CN113418887A (en) * | 2021-05-31 | 2021-09-21 | 浙江焜腾红外科技有限公司 | Imaging optical system for VOC gas emission |
| CN117233119A (en) * | 2023-11-10 | 2023-12-15 | 北京环拓科技有限公司 | Method for identifying and quantifying VOC (volatile organic compound) gas cloud image by combining sensor calibration module |
| CN117233119B (en) * | 2023-11-10 | 2024-01-12 | 北京环拓科技有限公司 | Method for identifying and quantifying VOC (volatile organic compound) gas cloud image by combining sensor calibration module |
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