CN114323461B - Industrial gas leak thermal infrared polarization detection method, detection device and detection system - Google Patents
Industrial gas leak thermal infrared polarization detection method, detection device and detection system Download PDFInfo
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Abstract
The application provides an industrial gas leakage heat infrared polarization detection method, a detection device and a detection system. The method comprises the following steps: acquiring a polarized infrared image of thermal radiation of a target object in a first wave band to obtain a first polarized infrared image; acquiring a polarized infrared image of the target object in the heat radiation of a second wave band, and obtaining a second polarized infrared image, wherein the second wave band is different from the first wave band; generating a polarization index image according to the first polarized infrared image and the second polarized infrared image; and carrying out threshold segmentation on the polarization index image and overlapping the polarization index image with the infrared intensity image to obtain a synthetic thermal infrared image of the leaked gas of the target object. According to the method, the polarization index images generated by the polarized infrared images with two different wavebands are subjected to threshold segmentation and overlapped with the infrared intensity images to obtain the synthetic thermal infrared image, so that compared with a traditional target detection algorithm, the detection omission ratio of gas leakage detection is reduced, and the problem of low accuracy of gas leakage detection in the prior art is solved.
Description
Technical Field
The application relates to the field of industrial safety production, in particular to an industrial gas leakage heat infrared polarization detection method, a detection device, a computer readable storage medium, a processor and a detection system.
Background
At present, the requirements on safe production and good ecological environment construction are higher and higher. The leakage of flammable, explosive and toxic harmful gases used in industry is not only an important cause of safety accidents, but also participates in the formation of ozone and secondary aerosol in the atmosphere, and has important influence on regional atmosphere pollution and PM2.5 pollution. The infrared thermal imaging detection method has the advantages of long distance, wide range and low cost, and is rapidly developed in the fields of petroleum and petrochemical industry, natural gas and the like. Therefore, a detection system capable of rapidly distinguishing gas from background is needed, so that the safety of industrial production can be improved, and the detection system has important significance for preventing and controlling atmospheric pollution and improving the living environment.
The above information disclosed in the background section is only for enhancement of understanding of the background art from the technology described herein and, therefore, may contain some information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.
Disclosure of Invention
The application mainly aims to provide an industrial gas leakage heat infrared polarization detection method, a detection device, a computer readable storage medium, a processor and a detection system, so as to solve the problem of low accuracy of gas leakage detection in the prior art.
According to an aspect of an embodiment of the present invention, there is provided an industrial gas leakage heat infrared polarization detection method, including: acquiring a polarized infrared image of thermal radiation of a target object in a first wave band to obtain a first polarized infrared image, wherein the target object is a scene with any gas leakage; acquiring a polarized infrared image of thermal radiation of the target object in a second wave band to obtain a second polarized infrared image, wherein the second wave band is different from the first wave band; generating a polarization index image according to the first polarized infrared image and the second polarized infrared image; and carrying out threshold segmentation on the polarization index image and overlapping the polarization index image with an infrared intensity image to obtain a synthetic thermal infrared image of the leaked gas of the target object, wherein the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering.
Optionally, acquiring a polarized infrared image of thermal radiation of the target object in the first band to obtain a first polarized infrared image includes: imaging the thermal radiation of the first wave band to obtain thermal infrared light intensity images with at least three polarization directions; and generating the first polarized infrared image according to the thermal infrared intensity images with at least three polarization directions.
Optionally, generating the first polarized infrared image from the thermal infrared intensity images of at least three polarization directions includes: determining the thermal radiation intensity of at least three polarization directions according to the thermal infrared light intensity images of at least three polarization directions; calculating the thermal radiation intensity of the first polarized infrared image according to the thermal radiation intensities of at least three polarization directions; generating the first polarized infrared image according to the thermal radiation intensity of the first polarized infrared image.
Optionally, generating a polarization index image from the first polarized infrared image and the second polarized infrared image includes: calculating a polarization index according to the heat radiation intensity of the first polarized infrared image and the heat radiation intensity of the second polarized infrared image; and generating the polarization index image according to the polarization index.
Optionally, threshold segmentation is performed on the polarization index image and the polarization index image is overlapped with an infrared intensity image, so as to obtain a synthetic thermal infrared image of the leakage gas of the target object, which comprises the following steps: acquiring the infrared intensity image of the target object; and fusing the segmented polarization index image with the infrared intensity image to obtain the synthetic thermal infrared image.
Optionally, threshold segmentation is performed on the polarization index image to obtain a polarized thermal infrared image of the leakage gas of the target object, including: and performing binarization and morphological filtering treatment on the polarization index image to obtain a polarized thermal infrared image of the leaked gas of the target object.
According to another aspect of the embodiment of the present invention, there is also provided an industrial gas leakage heat infrared polarization detection device, including: the first acquisition unit is used for acquiring a polarized infrared image of the thermal radiation of the target object in a first wave band to obtain a first polarized infrared image; the second acquisition unit is used for acquiring a polarized infrared image of the thermal radiation of the target object in a second wave band to obtain a second polarized infrared image, wherein the second wave band is different from the first wave band; the generation unit is used for generating a polarization index image according to the first polarized infrared image and the second polarized infrared image; and the processing unit is used for carrying out threshold segmentation on the polarization index image and overlapping the polarization index image with an infrared intensity image to obtain a synthetic thermal infrared image of the leaked gas of the target object, wherein the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering.
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program performs any one of the methods.
According to another aspect of the embodiment of the present invention, there is also provided a processor, where the processor is configured to execute a program, and where the program executes any one of the methods.
According to another aspect of the embodiment of the present invention, there is also provided a gas leakage detection system including an infrared polarization camera and an industrial gas leakage heat infrared polarization detection device for performing any one of the methods.
In the method for detecting the heat leakage infrared polarization of the industrial gas, firstly, a polarized infrared image of heat radiation of a target object in a first wave band is obtained, and a first polarized infrared image is obtained; then, obtaining a polarized infrared image of the thermal radiation of the target object in a second wave band, and obtaining a second polarized infrared image, wherein the second wave band is different from the first wave band; then, generating a polarization index image according to the first polarized infrared image and the second polarized infrared image; and finally, carrying out threshold segmentation on the polarization index image and overlapping the polarization index image with an infrared intensity image to obtain a synthetic thermal infrared image of the leaked gas of the target object, wherein the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering. According to the method, two polarized infrared images with different wavebands are obtained, the polarized index images generated by the two polarized infrared images are used for distinguishing leakage gas and background according to the difference of the radiation polarization characteristics of the gas leakage and the background surface, namely, the polarized index images are subjected to threshold segmentation and overlapped with the infrared intensity images to obtain the synthetic thermal infrared image of the leakage gas of the target object, compared with a traditional target detection algorithm, the detection omission rate of industrial gas leakage detection is reduced, the accuracy of positioning of a leakage source is improved, and the problem of low accuracy of gas leakage detection in the prior art is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a flow chart of an infrared polarization detection method for heat leak of industrial gas in an exemplary embodiment of the application;
FIG. 2 illustrates a thermal infrared polarization detection method flow in one embodiment of the application;
FIG. 3 is a schematic view showing the structure of the optical filter, the polarizing plate and the rotating mechanism in one embodiment of the present application;
FIG. 4 is a schematic diagram of an industrial gas leakage heat infrared polarization detection device in an exemplary embodiment of the present application;
fig. 5 shows a schematic diagram of a gas leak detection system in an exemplary embodiment of the application.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Furthermore, in the description and in the claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background art, in order to solve the above-mentioned problems, in an exemplary embodiment of the present application, an industrial gas leakage heat infrared polarization detection method, detection apparatus, computer-readable storage medium, processor, and detection system are provided.
According to an embodiment of the application, an industrial gas leakage heat infrared polarization detection method is provided.
Fig. 1 is a flow chart of an industrial gas leakage heat infrared polarization detection method according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:
step S101, obtaining a polarized infrared image of thermal radiation of a target object in a first wave band to obtain a first polarized infrared image, wherein the target object is a scene with any gas leakage;
step S102, obtaining a polarized infrared image of the thermal radiation of the target object in a second wave band, and obtaining a second polarized infrared image, wherein the second wave band is different from the first wave band;
step S103, generating a polarization index image according to the first polarized infrared image and the second polarized infrared image;
step S104, threshold segmentation is carried out on the polarization index image and the polarization index image is overlapped with an infrared intensity image, so that a synthetic thermal infrared image of the leaked gas of the target object is obtained, and the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering.
In the method for detecting the heat leakage infrared polarization of the industrial gas, firstly, a polarized infrared image of heat radiation of a target object in a first wave band is obtained, and a first polarized infrared image is obtained; then, obtaining a polarized infrared image of the thermal radiation of the target object in a second wave band, and obtaining a second polarized infrared image, wherein the second wave band is different from the first wave band; then, generating a polarization index image according to the first polarized infrared image and the second polarized infrared image; and finally, carrying out threshold segmentation on the polarization index image and overlapping the polarization index image with an infrared intensity image to obtain a synthetic thermal infrared image of the leaked gas of the target object, wherein the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering. According to the method, two polarized infrared images with different wavebands are obtained, the polarized index images generated by the two polarized infrared images are used for distinguishing leakage gas and background according to the difference of the radiation polarization characteristics of the gas leakage and the background surface, namely, the polarized index images are subjected to threshold segmentation and overlapped with the infrared intensity images to obtain the synthetic thermal infrared image of the leakage gas of the target object, compared with a traditional target detection algorithm, the detection omission rate of industrial gas leakage detection is reduced, the accuracy of positioning of a leakage source is improved, and the problem of low accuracy of gas leakage detection in the prior art is solved.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
In one embodiment of the present application, as shown in fig. 2, obtaining a polarized infrared image of thermal radiation of a target object in a first band to obtain a first polarized infrared image includes: imaging the thermal radiation of the first wave band to obtain thermal infrared light intensity images with at least three polarization directions; and generating the first polarized infrared image according to the thermal infrared intensity images with at least three polarization directions. The accuracy of the first polarized infrared image obtained by generating the first polarized infrared image according to the thermal infrared intensity images in at least three directions is higher.
In a specific embodiment of the present application, the first wavelength band may be a mid-infrared or long-wave infrared wavelength band, as shown in fig. 3, the target object enters a conventional infrared lens, and is imaged by an infrared detector through an optical filter and a polarizing plate respectively to obtain a first polarized infrared image, where the at least three polarization directions may be 0 °, 60 °, 120 ° or other angles.
In another embodiment of the present application, generating the first polarized infrared image from the thermal infrared intensity images of at least three polarization directions includes: determining the heat radiation intensity of at least three polarization directions according to the heat infrared light intensity images of at least three polarization directions; calculating the thermal radiation intensity of the first polarized infrared image according to the thermal radiation intensities of at least three polarization directions; generating the first polarized infrared image according to the heat radiation intensity of the first polarized infrared image. The accuracy of calculating the heat radiation intensity of the first polarized infrared image through the heat radiation intensities of at least three polarization directions is high, the calculation method is simple, leakage judgment is timely, and safety is improved. And generating the first polarized infrared image according to the heat radiation intensity of the first polarized infrared image, thereby further improving the accuracy of the first polarized infrared image.
Specifically, the target object enters a traditional infrared lens, the polaroids are sequentially rotated through an optical filter and the polaroids respectively, the thermal radiation intensities (L 1、L2、L3) in three different directions are obtained by an infrared detector, the polarized image of the current wave band is calculated in a combined mode based on the thermal radiation intensities in the three different directions, the three different directions can be directions with polarization angles of 0 DEG, 60 DEG and 120 DEG respectively, and the thermal radiation intensity Lp 1 of the first polarized infrared image has the following calculation formula:
In still another embodiment of the present application, as shown in fig. 2, generating a polarization index image according to the first polarized infrared image and the second polarized infrared image includes: calculating a polarization index according to the heat radiation intensity of the first polarized infrared image and the heat radiation intensity of the second polarized infrared image; and generating the polarization index image according to the polarization index. And generating a polarization index image according to the polarized infrared images of the two wave bands, thereby further improving the accuracy of positioning the leakage source.
In a specific embodiment of the present application, the formula for calculating the polarization index Pindex according to the heat radiation intensity Lp 1 of the first polarized infrared image and the heat radiation intensity Lp 2 of the second polarized infrared image is as follows:
Pindex＝(Lp1-Lp2)/(Lp1+Lp2)
In still another embodiment of the present application, as shown in fig. 2, the threshold segmentation is performed on the polarization index image and the polarization index image is superimposed with an infrared intensity image to obtain a synthetic thermal infrared image of the leakage gas of the target object, including: collecting an infrared intensity image of the target object; and fusing the segmented polarization index image with the infrared intensity image to obtain the synthetic thermal infrared image. And (3) carrying out threshold segmentation on the polarization index image, extracting a leakage area, further carrying out fusion processing on the leakage area and the infrared intensity image, and superposing and displaying the segmented gas leakage area and the infrared intensity image, so that personnel can observe the leakage area conveniently, and specific methods such as edge enhancement/pseudo color and the like are included and are not limited.
In another embodiment of the present application, the threshold segmentation is performed on the polarization index image to obtain a polarized thermal infrared image of the leaked gas of the target object, including: and performing binarization and morphological filtering treatment on the polarization index image to obtain a polarized thermal infrared image of the leaked gas of the target object. The polarization index image is subjected to binarization and morphological filtering treatment, the method is simple and convenient, and the accuracy of obtaining the polarized thermal infrared image of the leaked gas of the target object is high.
The embodiment of the application also provides an industrial gas leakage heat infrared polarization detection device, and the industrial gas leakage heat infrared polarization detection device can be used for executing the industrial gas leakage heat infrared polarization detection method provided by the embodiment of the application. The following describes an industrial gas leakage heat infrared polarization detection device provided by the embodiment of the application.
Fig. 4 is a schematic diagram of an industrial gas leakage heat infrared polarization detection device according to an embodiment of the present application. As shown in fig. 4, the apparatus includes:
a first acquiring unit 10, configured to acquire a polarized infrared image of thermal radiation of a target object in a first band, to obtain a first polarized infrared image;
A second acquiring unit 20, configured to acquire a polarized infrared image of thermal radiation of the target object in a second band, to obtain a second polarized infrared image, where the second band is different from the first band;
A generating unit 30 for generating a polarization index image from the first polarized infrared image and the second polarized infrared image;
And a processing unit 40, configured to perform threshold segmentation on the polarization index image and superimpose the polarization index image with an infrared intensity image, to obtain a synthetic thermal infrared image of the leaked gas of the target object, where the infrared intensity image is an infrared image generated by collecting thermal radiation that is not polarized and filtered.
In the industrial gas leakage heat infrared polarization detection device, firstly, a polarized infrared image of heat radiation of a target object in a first wave band is acquired through the first acquisition unit, and a first polarized infrared image is obtained; then, acquiring a polarized infrared image of the thermal radiation of the target object in a second wave band through the second acquisition unit to obtain a second polarized infrared image, wherein the second wave band is different from the first wave band; then, the generating unit generates a polarization index image according to the first polarized infrared image and the second polarized infrared image; and finally, carrying out threshold segmentation on the polarization index image and overlapping the polarization index image with an infrared intensity image to obtain a synthetic thermal infrared image of the leaked gas of the target object, wherein the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering. According to the method, two polarized infrared images with different wavebands are obtained, the polarized index images generated by the two polarized infrared images are used for distinguishing leakage gas and background according to the difference of the radiation polarization characteristics of the gas leakage and the background surface, namely, the polarized index images are subjected to threshold segmentation and overlapped with the infrared intensity images to obtain the synthetic thermal infrared image of the leakage gas of the target object, compared with a traditional target detection algorithm, the detection omission rate of industrial gas leakage detection is reduced, the accuracy of positioning of a leakage source is improved, and the problem of low accuracy of gas leakage detection in the prior art is solved.
In one embodiment of the present application, the first acquisition unit includes a first acquisition subunit and a first generation subunit, where the first acquisition subunit is configured to image thermal radiation in the first band to obtain thermal infrared intensity images in at least three polarization directions; the first generation subunit is configured to generate the first polarized infrared image according to the thermal infrared intensity images with at least three polarization directions. The accuracy of the first polarized infrared image obtained by generating the first polarized infrared image according to the thermal infrared intensity images in at least three directions is higher.
In a specific embodiment of the present application, the first band may be a mid-infrared or long-wave infrared band, the target object enters the infrared optical system, and is imaged by the infrared imaging detector through the optical filter and the polarizing plate to obtain the first polarized infrared image, and the at least three polarization directions may be 0 °,60 °, 120 ° or other angles.
In another embodiment of the present application, the first generating subunit includes a determining module, a calculating module, and a generating module, where the determining module is configured to determine thermal radiation intensities of at least three polarization directions according to thermal infrared light intensity images of the at least three polarization directions; the calculating module is used for calculating the heat radiation intensity of the first polarized infrared image according to the heat radiation intensities of at least three polarization directions; the generation module is used for generating the first polarized infrared image according to the heat radiation intensity of the first polarized infrared image. The accuracy of calculating the heat radiation intensity of the first polarized infrared image through the heat radiation intensities of at least three polarization directions is high, the calculation method is simple, leakage judgment is timely, and safety is improved. And generating the first polarized infrared image according to the heat radiation intensity of the first polarized infrared image, thereby further improving the accuracy of the first polarized infrared image.
Specifically, the target object enters a traditional infrared lens, the polaroids are sequentially rotated through an optical filter and the polaroids respectively, the thermal radiation intensities (L 1、L2、L3) in three different directions are obtained by an infrared detector, the polarized image of the current wave band is calculated in a combined mode based on the thermal radiation intensities in the three different directions, the three different directions can be directions with polarization angles of 0 DEG, 60 DEG and 120 DEG respectively, and the thermal radiation intensity Lp 1 of the first polarized infrared image has the following calculation formula:
in yet another embodiment of the present application, the generating unit includes a calculating subunit and a second generating subunit, where the calculating subunit is configured to calculate a polarization index according to a thermal radiation intensity of the first polarized infrared image and a thermal radiation intensity of the second polarized infrared image; the second generation subunit is configured to generate the polarization index image according to the polarization index. And generating a polarization index image according to the polarized infrared images of the two wave bands, thereby further improving the accuracy of positioning the leakage source.
In a specific embodiment of the present application, the formula for calculating the polarization index Pindex according to the heat radiation intensity Lp 1 of the first polarized infrared image and the heat radiation intensity Lp 2 of the second polarized infrared image is as follows:
Pindex＝(Lp1-Lp2)/(Lp1+Lp2)
In still another embodiment of the present application, the processing unit further includes an acquisition module and a fusion module. The acquisition module is used for acquiring an infrared intensity image of the target object; the fusion module is used for fusing the polarized thermal infrared image of the leaked gas of the target object with the infrared intensity image to obtain the synthetic thermal infrared image. And (3) carrying out threshold segmentation on the polarization index image, extracting a leakage area, further carrying out fusion processing on the leakage area and the infrared intensity image, and superposing and displaying the segmented gas leakage area and the infrared intensity image, so that personnel can observe the leakage area conveniently, and specific methods such as edge enhancement/pseudo color and the like are included and are not limited.
In another embodiment of the present application, the processing unit includes a processing subunit, where the processing subunit is configured to perform binarization and morphological filtering processing on the polarization index image to obtain a polarized thermal infrared image of the leaked gas of the target object. The polarization index image is subjected to binarization and morphological filtering treatment, the method is simple and convenient, and the accuracy of obtaining the polarized thermal infrared image of the leaked gas of the target object is high.
The industrial gas leakage heat infrared polarization detection device comprises a processor and a memory, wherein the first acquisition unit, the second acquisition unit, the generation unit, the processing unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The inner core can be provided with one or more than one, and the problem of low accuracy of gas leakage detection in the prior art is solved by adjusting the parameters of the inner core.
The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.
An embodiment of the present invention provides a computer-readable storage medium having stored thereon a program that, when executed by a processor, implements the above-described method for detecting infrared polarization of leakage heat of industrial gas.
The embodiment of the invention provides a processor, which is used for running a program, wherein the infrared polarization detection method for the leakage heat of the industrial gas is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:
step S101, obtaining a polarized infrared image of thermal radiation of a target object in a first wave band to obtain a first polarized infrared image, wherein the target object is a scene with any gas leakage;
step S102, obtaining a polarized infrared image of the thermal radiation of the target object in a second wave band, and obtaining a second polarized infrared image, wherein the second wave band is different from the first wave band;
step S103, generating a polarization index image according to the first polarized infrared image and the second polarized infrared image;
step S104, threshold segmentation is carried out on the polarization index image and the polarization index image is overlapped with an infrared intensity image, so that a synthetic thermal infrared image of the leaked gas of the target object is obtained, and the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering.
The device herein may be a server, PC, PAD, cell phone, etc.
The application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with at least the following method steps:
step S101, obtaining a polarized infrared image of thermal radiation of a target object in a first wave band to obtain a first polarized infrared image, wherein the target object is a scene with any gas leakage;
step S102, obtaining a polarized infrared image of the thermal radiation of the target object in a second wave band, and obtaining a second polarized infrared image, wherein the second wave band is different from the first wave band;
step S103, generating a polarization index image according to the first polarized infrared image and the second polarized infrared image;
step S104, threshold segmentation is carried out on the polarization index image and the polarization index image is overlapped with an infrared intensity image, so that a synthetic thermal infrared image of the leaked gas of the target object is obtained, and the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering.
In yet another exemplary embodiment of the present application, there is also provided a gas leak detection system including an infrared polarized camera and an industrial gas leak thermal infrared polarization detection device for performing any of the methods described above.
The detection system for gas leakage comprises an infrared polarization camera and an industrial gas leakage heat infrared polarization detection device, wherein the industrial gas leakage heat infrared polarization detection device is used for executing any one of the methods, as shown in fig. 5, a gas leakage scene enters a traditional infrared lens, the polaroids are sequentially rotated through an optical filter and the polaroids, the thermal radiation intensities in three different directions of a first wave band and three different directions of a second wave band are obtained through the infrared detector, the polarized images of the current wave band are calculated through the combination of a signal processing circuit based on the thermal radiation intensities in the three different directions, then the polarized index images are generated through the signal processing circuit according to the polarized images of the first wave band and the second wave band, and the polarized index images are subjected to binarization and morphological filtering processing to obtain the polarized heat infrared images of the leaked gas. The gas leakage detection system can realize real-time monitoring of the gas leakage source, and particularly when the background is a relatively smooth wall surface or a pipeline scene, monitoring personnel can effectively distinguish the background and the gas target in a polarization mode. Compared with the traditional target detection algorithm, the method provided by the application has the advantages that the physical principle is adopted, the hardware and the software are combined, the detection omission probability of industrial gas leakage detection is greatly reduced, and the accuracy of leakage source positioning is improved.
In a specific embodiment of the present application, the above gas leakage detection system is required to be connected to a monitor or a computer receiving end, and the thermal infrared gas detector is turned on, and a thermal infrared polarized image is displayed on the monitor, so that the thermal infrared polarized image can be switched to the polarized image by using a key, and when gas leakage occurs in a field of view, a gas target in the polarized image is obviously separated from a background, and can be rapidly identified by human eyes. The polarization degree result of any point can be quantitatively displayed through a computer end, and the polarization degree threshold value for judging gas leakage can be adjusted to achieve the optimal detection effect.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units may be a logic function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a computer readable storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the above-mentioned methods of the various embodiments of the present invention. And the aforementioned computer-readable storage medium includes: a usb disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
1) In the industrial gas leakage heat infrared polarization detection method, firstly, a polarized infrared image of heat radiation of a target object in a first wave band is obtained, and a first polarized infrared image is obtained; then, obtaining a polarized infrared image of the thermal radiation of the target object in a second wave band, and obtaining a second polarized infrared image, wherein the second wave band is different from the first wave band; then, generating a polarization index image according to the first polarized infrared image and the second polarized infrared image; and finally, carrying out threshold segmentation on the polarization index image and overlapping the polarization index image with an infrared intensity image to obtain a synthetic thermal infrared image of the leaked gas of the target object, wherein the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering. According to the method, two polarized infrared images with different wavebands are obtained, the polarized index images generated by the two polarized infrared images are used for distinguishing leakage gas and background according to the difference of the radiation polarization characteristics of the gas leakage and the background surface, namely, the polarized index images are subjected to threshold segmentation and overlapped with the infrared intensity images to obtain the synthetic thermal infrared image of the leakage gas of the target object, compared with a traditional target detection algorithm, the detection omission rate of industrial gas leakage detection is reduced, the accuracy of positioning of a leakage source is improved, and the problem of low accuracy of gas leakage detection in the prior art is solved.
2) In the industrial gas leakage heat infrared polarization detection device, the device comprises a first acquisition unit, a second acquisition unit, a generation unit and a processing unit, wherein a polarized infrared image of heat radiation of a target object in a first wave band is acquired through the first acquisition unit to obtain a first polarized infrared image; then, acquiring a polarized infrared image of the thermal radiation of the target object in a second wave band through the second acquisition unit to obtain a second polarized infrared image, wherein the second wave band is different from the first wave band; then, the generating unit generates a polarization index image according to the first polarized infrared image and the second polarized infrared image; and finally, carrying out threshold segmentation on the polarization index image and overlapping the polarization index image with an infrared intensity image to obtain a synthetic thermal infrared image of the leaked gas of the target object, wherein the infrared intensity image is an infrared image generated by collecting thermal radiation which is not subjected to polarization and filtering. According to the method, two polarized infrared images with different wavebands are obtained, the polarized index images generated by the two polarized infrared images are used for distinguishing leakage gas and background according to the difference of the radiation polarization characteristics of the gas leakage and the background surface, namely, the polarized index images are subjected to threshold segmentation and overlapped with the infrared intensity images to obtain the synthetic thermal infrared image of the leakage gas of the target object, compared with a traditional target detection algorithm, the detection omission rate of industrial gas leakage detection is reduced, the accuracy of positioning of a leakage source is improved, and the problem of low accuracy of gas leakage detection in the prior art is solved.
3) The detection system for gas leakage comprises an infrared polarization camera and an industrial gas leakage heat infrared polarization detection device, wherein the industrial gas leakage heat infrared polarization detection device is used for executing any one of the methods, so that the real-time monitoring of a gas leakage source can be realized, and particularly when the background is a relatively smooth wall surface or a pipeline scene, a monitoring person can effectively distinguish the background from a gas target in a polarization mode. Compared with the traditional target detection algorithm, the method provided by the application has the advantages that the physical principle is adopted, the hardware and the software are combined, the detection omission probability of industrial gas leakage detection is greatly reduced, and the accuracy of leakage source positioning is improved.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
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