Dual field of view aerosol detection optical system and method based on shadowgraph imaging

Abstract

The application discloses a kind of based on double view field aerosol detection optical system and method of schlieren imaging, in based on double view field aerosol detection optical system of schlieren imaging, laser emits laser to the aerosol to be measured to form emission light path, first receiving lens receives backscattering signal to form first optical signal, first plane industrial camera gathers first optical signal from first receiving lens to generate first optical information with corresponding distance and intensity, second receiving lens receives backscattering signal to form second optical signal, second plane industrial camera gathers second optical signal from second receiving lens to generate second optical information of corresponding distance and intensity, signal processing system is connected first plane industrial camera and second plane industrial camera to gather first optical information and second optical information, generates intensity profile information based on first optical information and second optical information.

Description

Technical Field

[0001] This invention belongs to the field of laser atmospheric remote sensing technology, and in particular to a dual-field-of-view aerosol detection optical system and method based on Saxony imaging. Background Technology

[0002] Aerosols are gaseous dispersion systems composed of solid or liquid particles suspended in a gaseous medium. Specific examples of aerosols include clouds, fog, and dust in the sky; smoke from unburned fuel in boilers and various engines used in industry and transportation; solid dust generated during mining, quarrying, stone processing, and grain processing; and man-made smoke screens and toxic fumes.

[0003] In daily life, various factors can lead to the leakage of harmful aerosols, which seriously affect the atmospheric environment and human safety. Therefore, studying and detecting the diffusion, distribution, and movement patterns of aerosols is of great significance for establishing effective ventilation prevention measures and emergency response mechanisms.

[0004] When the size of the detected particles is comparable to the wavelength of the incident light, Mie scattering typically occurs. Mie scattering is an elastic scattering caused by the interaction of various solid and liquid aerosol particles in the atmosphere with the laser light, where the laser wavelength remains unchanged. Compared to other scattering methods, Mie scattering has a larger scattering cross-section, resulting in typically larger echo signals from Mie scattering lidar, making detection easier.

[0005] The sand-based imaging principle states that a clear image of the object can be formed when the planes containing the image plane, the object plane, and the lens in an imaging system intersect on a straight line. Sand-based Mie scattering lidar technology is a novel technology designed based on this principle. It can be used to detect aerosols in the atmosphere, providing an effective and active means of atmospheric detection. Compared to traditional pulsed lidar, it features lower cost, smaller size, and higher resolution. However, when studying aerosol distribution, diffusion, and motion patterns, sand-based Mie scattering lidar still has a significant blind zone. The lack of aerosol information within this blind zone affects the acquisition of aerosol distribution-related information.

[0006] The information disclosed in the background section is only intended to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention proposes a dual-field-of-view aerosol detection optical system based on Saxony imaging, which has a compact structure and small size; at the same time, by increasing the field of view, the blind zone of the main field of view is compensated, and the detection range of the system is expanded; and the two fields of view have some overlapping detection areas, and by fusing the signals in the overlapping areas, an intensity distribution profile map within the detection distance range can be obtained.

[0008] The objective of this invention is achieved through the following technical solution: a dual-field-of-view aerosol detection optical system based on Saxony imaging includes:

[0009] A laser that emits a laser beam toward the aerosol to be tested to form an emission optical path, wherein the laser beam irradiates the aerosol to be tested to generate a backscattered signal, and the emission optical path has an emission optical path horizontal plane;

[0010] A first receiving lens receives the backscattered signal to form a first optical signal. The center of the first receiving lens is spaced a first distance from the horizontal plane of the emitted light path, and the plane of the first receiving lens where the first receiving lens is located forms a first angle with the horizontal plane of the emitted light path. The starting point of the detection distance is the intersection of a perpendicular line drawn from the center of the first receiving lens to the horizontal plane of the emitted light path.

[0011] A first planar industrial camera acquires a first optical signal from a first receiving lens to generate first optical information with corresponding distance and intensity. The center of the first planar industrial camera is spaced a second distance from the horizontal plane of the transmitting optical path, and there is a second included angle between the plane of the first receiving lens and the plane of the area array detector of the first planar industrial camera. The lowest point of the area array detector of the first planar industrial camera is a first distance from the plane of the first receiving lens. The line connecting the center of the first area array detector of the first planar industrial camera and the center of the first receiving lens is perpendicular to the plane of the first receiving lens. The plane of the first receiving lens, the plane of the first area array detector of the first planar industrial camera, and the horizontal plane of the transmitting optical path intersect at a first straight line.

[0012] The second receiving lens receives the backscattered signal to form a second optical signal. The center of the second receiving lens is spaced a third distance from the horizontal plane of the emitted light path, and the plane of the second receiving lens where the second receiving lens is located forms a third angle with the horizontal plane of the emitted light path.

[0013] The second planar industrial camera acquires a second optical signal from a second receiving lens to generate second optical information with corresponding distance and intensity. The center of the second planar industrial camera is spaced a fourth distance from the horizontal plane of the transmitting optical path, and there is a fourth included angle between the plane of the second receiving lens and the plane of the second array detector of the second planar industrial camera. The lowest point of the array detector of the second planar industrial camera is a second distance from the plane of the second receiving lens. The line connecting the center of the second array detector of the second planar industrial camera and the center of the second receiving lens is perpendicular to the plane of the second receiving lens. The plane of the second receiving lens, the plane of the second array detector of the second planar industrial camera, and the horizontal plane of the transmitting optical path intersect at a second straight line.

[0014] A signal processing system is connected to the first planar industrial camera and the second planar industrial camera to acquire first optical information and second optical information, and to generate intensity profile information based on the first optical information and the second optical information.

[0015] In the dual-field-of-view aerosol detection optical system based on Saxony imaging, the first spacing is greater than the third spacing, the second spacing is greater than the fourth spacing, the first distance is greater than the second distance, and the first included angle is greater than the third included angle.

[0016] In the dual-field-of-view aerosol detection optical system based on Saxony imaging, the first spacing is 148.5 mm, the first included angle is 86.6°, the second spacing is 150 mm, the second included angle is 35.0°, and the first distance is 100 mm.

[0017] In the aforementioned dual-field-of-view aerosol detection optical system based on Saxony imaging, the third spacing is 74.7 mm, the third included angle is 81.0°, the fourth spacing is 75 mm, the fourth included angle is 30.0°, and the second distance is 40 mm.

[0018] In the dual-field-of-view aerosol detection optical system based on Saxony imaging, the main field-of-view detection range is 1.45m to 10.83m, and the secondary field-of-view detection range is 0.29m to 2.05m.

[0019] In the aforementioned dual-field-of-view aerosol detection optical system based on Saxony imaging, the resolution of the dual-field-of-view aerosol detection optical system is 0.1 mm to 38.2 mm within a detection range of 0.29 to 10.83 m.

[0020] In the aforementioned dual-field-of-view aerosol detection optical system based on Saxony imaging, the laser is a semiconductor laser.

[0021] In the aforementioned dual-field-of-view aerosol detection optical system based on Saxony imaging, the first receiving lens and the second receiving lens are cemented doublet achromatic lenses.

[0022] In the aforementioned dual-field-of-view aerosol detection optical system based on Saxony imaging, the signal processing system includes a correction unit for signal intensity correction, an interpolation unit for distance resolution interpolation, and a fusion unit for signal splicing and fusion.

[0023] The detection method of the dual-field-of-view aerosol detection optical system based on Saxony imaging includes,

[0024] A laser emits a laser beam toward the aerosol to be tested, and the laser beam irradiates the aerosol to be tested to generate a backscattered signal.

[0025] A first receiving lens receives the backscattered signal to form a first optical signal. A first planar industrial camera acquires the first optical signal from the first receiving lens to generate first optical information with corresponding distance and intensity. The plane of the first receiving lens, the plane of the first planar industrial camera's first array detector, and the horizontal plane of the emitted light path satisfy the Saxony imaging principle. The first receiving lens and the first planar industrial camera constitute the main field of view. Each pixel of the first planar industrial camera detects aerosols at different distances in an angle-resolved manner.

[0026] The second receiving lens receives the backscattered signal to form a second optical signal. The second planar industrial camera acquires the second optical signal from the second receiving lens to generate second optical information with corresponding distance and intensity. The plane of the second receiving lens, the plane of the second array detector of the second planar industrial camera, and the horizontal plane of the emitted light path satisfy the Shapiro imaging principle. The second receiving lens and the second planar industrial camera constitute a secondary field of view. Each pixel of the second planar industrial camera detects aerosols at different distances in an angle-resolved manner.

[0027] The first and second optical information are transmitted synchronously to the signal processing system. The intensity of the first and second optical information is corrected by the ratio of the system constants of the main field of view and the sub-field of view. The second optical information is interpolated to match the resolution of the main field of view. The window width is set in the overlapping area of ​​the detection range of the two fields of view. The area with the highest correlation coefficient is searched as the optimal stitching interval. The intensity profile information of the entire detection range is obtained by using the average value of the signals of the main field of view and the sub-field of view in the optimal stitching interval.

[0028] Compared with the prior art, the present invention has the following advantages: the dual-field aerosol detection optical system based on Saxony imaging described in the present invention is low in cost, simple to operate, and small in size. The two fields of view detect signals at different distances respectively, which is beneficial to expanding the detection range and reducing the blind zone. Attached Figure Description

[0029] Various other advantages and benefits of the present invention will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0030] In the attached diagram:

[0031] Figure 1 This is a schematic diagram of a dual-field-of-view aerosol detection optical system based on Saxony imaging according to an embodiment of the present invention.

[0032] The present invention will be further explained below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0033] Specific embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0034] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions are preferred embodiments for carrying out the invention; however, these descriptions are for the purpose of understanding the general principles of the specification and are not intended to limit the scope of the invention. The scope of protection of this invention is determined by the appended claims.

[0035] To facilitate understanding of the embodiments of the present invention, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings do not constitute a limitation on the embodiments of the present invention.

[0036] To better understand, such as Figure 1 As shown, the dual-field-of-view aerosol detection optical system based on Saxony imaging includes:

[0037] Laser 5 emits a laser beam toward the aerosol to be tested to form an emission optical path. The laser beam irradiates the aerosol to be tested to generate a backscattered signal. The emission optical path has a horizontal plane.

[0038] A first receiving lens 2 receives the backscattered signal to form a first optical signal. The center of the first receiving lens 2 is spaced a first distance from the horizontal plane of the emission light path, and the plane of the first receiving lens 2 has a first angle with the horizontal plane of the emission light path. The intersection of a perpendicular line drawn from the center of the first receiving lens 2 to the horizontal plane of the emission light path is the starting point 7 of the detection distance of the dual-field-of-view aerosol detection optical system based on Saxony imaging.

[0039] A first planar industrial camera 1 acquires a first optical signal from a first receiving lens 2 to generate first optical information with corresponding distance and intensity. The center of the first planar industrial camera 1 is spaced a second distance from the horizontal plane of the transmitting optical path, and there is a second included angle between the plane of the first receiving lens and the plane of the area array detector of the first planar industrial camera 1. The lowest point of the area array detector of the first planar industrial camera 1 is a first distance from the plane of the first receiving lens. The line connecting the center of the first area array detector of the first planar industrial camera 1 and the center of the first receiving lens 2 is perpendicular to the plane of the second receiving lens 2. The plane of the first receiving lens, the plane of the first area array detector of the first planar industrial camera, and the horizontal plane of the transmitting optical path intersect at a first straight line.

[0040] The second receiving lens 3 receives the backscattered signal to form a second optical signal. The center of the second receiving lens 3 is spaced a third distance from the horizontal plane of the emitted light path, and the plane of the second receiving lens 3 has a third angle with the horizontal plane of the emitted light path.

[0041] The second planar industrial camera 4 acquires the second optical signal from the second receiving lens 3 to generate second optical information with corresponding distance and intensity. The center of the second planar industrial camera 4 is spaced a fourth distance from the horizontal plane of the transmitting light path, and there is a fourth included angle between the plane of the second receiving lens and the plane of the second array detector of the second planar industrial camera 4. The lowest point of the array detector of the second planar industrial camera 4 is a second distance from the plane of the second receiving lens. The line connecting the center of the second array detector of the second planar industrial camera and the center of the second receiving lens is perpendicular to the plane of the second receiving lens. The plane of the second receiving lens, the plane of the second array detector of the second planar industrial camera, and the horizontal plane of the transmitting light path intersect at a second straight line.

[0042] The signal processing system 6 is connected to the first planar industrial camera 1 and the second planar industrial camera 4 to acquire first optical information and second optical information, and to generate intensity profile information based on the first optical information and second optical information.

[0043] In a preferred embodiment of the dual-field-of-view aerosol detection optical system based on Saxony imaging, the first spacing is greater than the third spacing, the second spacing is greater than the fourth spacing, the first distance is greater than the second distance, the first included angle is less than the third included angle, the second included angle is greater than the fourth included angle, and the first straight line is closer to the laser 5 than the second straight line.

[0044] In a preferred embodiment of the dual-field-of-view aerosol detection optical system based on Saxony imaging, the first spacing is 148.5 mm, the first included angle is 86.6°, the second spacing is 150 mm, the second included angle is 35.0°, and the first distance is 100 mm.

[0045] In a preferred embodiment of the dual-field-of-view aerosol detection optical system based on Saxony imaging, the third spacing is 74.7 mm, the third included angle is 81.0°, the fourth spacing is 75 mm, the fourth included angle is 30.0°, and the second distance is 40 mm.

[0046] In a preferred embodiment of the dual-field-of-view aerosol detection optical system based on Saxony imaging, the main field-of-view detection range of the dual-field-of-view aerosol detection optical system is 1.45m to 10.83m, and the secondary field-of-view detection range is 0.29m to 2.05m.

[0047] In a preferred embodiment of the dual-field-of-view aerosol detection optical system based on Saxony imaging, the dual-field-of-view aerosol detection optical system has a resolution of 0.1 mm to 38.2 mm within a detection range of 0.29 m to 10.83 m.

[0048] In a preferred embodiment of the dual-field-of-view aerosol detection optical system based on Saxony imaging, the laser 5 is a semiconductor laser 5.

[0049] In a preferred embodiment of the dual-field-of-view aerosol detection optical system based on Saxony imaging, the first receiving lens 2 and the second receiving lens 3 are cemented doublet achromatic lenses.

[0050] In a preferred embodiment of the dual-field-of-view aerosol detection optical system based on Saxony imaging, the signal processing system 6 includes a correction unit for signal intensity correction, an interpolation unit for distance resolution interpolation, and a fusion unit for signal splicing and fusion.

[0051] In one embodiment, the first receiving lens plane, the area array detector plane of the first planar industrial camera, and the horizontal plane of the laser 5 emission path intersect each other at a fixed angle, and each pixel of the first planar industrial camera 1 detects aerosols at different distances in an angle-resolved manner.

[0052] In one embodiment, the optical system includes a laser 5, a first receiving lens 2, a second receiving lens 3, a first planar industrial camera 1, a second planar industrial camera 4, and a signal processing system 6. The laser 5 is a 520nm wavelength semiconductor laser that emits laser light onto an aerosol. The first receiving lens 2 and the second receiving lens 3 are cemented doublet achromatic lenses with a diameter of 50mm and a focal length of 100mm and a diameter of 25mm and a focal length of 40mm, respectively. The first planar industrial camera 1 and the second planar industrial camera 4 have a resolution of 1920*1200, with each pixel being a square with a side length of 5.86µm. The distance between the center of the first receiving lens 2 and the horizontal plane of the laser 5's emission path is 148.5mm; the angle between the plane of the first receiving lens and the horizontal plane of the laser 5's emission path is 86.6°; and the angle between the plane of the first receiving lens and the plane of the second array detector of the first planar industrial camera is 35.0°. The distance between the center of the second receiving lens 3 and the horizontal plane of the laser 5's emission path is 74.7 mm; the angle between the plane of the first receiving lens and the horizontal plane of the laser 5's emission path is 81.0°, and the angle between the plane of the first receiving lens and the plane of the first array detector of the first planar industrial camera is 30.0°. The distance between the center of the first planar industrial camera 1 and the horizontal plane of the laser 5's emission path is 150 mm, and the distance between the center of the second planar industrial camera 4 and the horizontal plane of the laser 5's emission path is 75 mm. The distance from the bottom of the array detector in the first planar industrial camera 1 to the plane of the first receiving lens is 100 mm; the distance from the bottom of the array detector in the second planar industrial camera 4 to the plane of the second receiving lens is 40 mm. The Shapiro imaging principle involves the second receiving lens plane, the plane of the array detector of the second planar industrial camera, and the horizontal plane of the laser 5's emission path intersecting each other at a fixed angle. Each pixel of the second planar industrial camera 4 detects aerosols at different distances using an angle-resolved method. The first receiving lens 2 and the first planar industrial camera 1 constitute the main field of view. The plane of the first receiving lens, the plane of the first array detector of the first planar industrial camera, and the plane of the laser 5 emission path satisfy the Saxophone imaging principle. According to the Saxophone imaging principle, the detection range of the main field of view is 1.45m to 10.83m. The second receiving lens 3 and the second planar industrial camera 4 constitute the secondary field of view. The plane of the second receiving lens, the plane of the second array detector of the second planar industrial camera, and the plane of the laser 5 emission path satisfy the Saxophone imaging principle. According to the Saxophone imaging principle, the detection range of the secondary field of view is 0.29m to 2.05m. The dual-field-of-view aerosol detection method and optical system based on the Saxophone imaging principle has a resolution range of 0.1mm to 38.2mm in the range of 0.29m to 10.83m.

[0053] In one embodiment, the signal processing system 6 is a computer that can simultaneously receive acquisition information from the first planar industrial camera 1 and the second planar industrial camera 4, and perform signal processing to obtain a full-range intensity profile within the detection range. The signal processing includes signal intensity correction, range resolution interpolation, and signal stitching fusion. The correction unit uses the ratio of the system constants of the main field of view and the secondary field of view to correct the intensity of the two field-of-view signals, achieving numerical uniformity of the signal intensity. The interpolation unit interpolates the secondary field-of-view signal to match its resolution with the main field of view, ensuring uniform range resolution within the overlapping detection range of the two fields of view. The fusion unit searches for the optimal stitching interval within the overlapping detection range of the main and secondary fields of view to perform signal fusion, obtaining an intensity profile across the entire detection range. The stitching fusion process involves setting a window width within the overlapping detection range of the two fields of view and searching for the region with the highest correlation coefficient as the optimal stitching interval. The secondary field-of-view signal is used at the near end, and the main field-of-view signal is used at the far end. The optimal stitching interval uses the average of the main and secondary field-of-view signals to obtain the intensity profile across the entire detection range.

[0054] The detection method of the dual-field-of-view aerosol detection optical system based on Saxony imaging includes,

[0055] Laser 5 emits a laser beam toward the aerosol to be tested, and the laser beam irradiates the aerosol to be tested to generate a backscattering signal.

[0056] The first receiving lens 2 receives the backscattered signal to form a first optical signal. The first planar industrial camera 1 acquires the first optical signal from the first receiving lens 2 to generate first optical information with corresponding distance and intensity. The plane of the first receiving lens, the plane of the first planar industrial camera's first array detector, and the horizontal plane of the emitted light path satisfy the Saxony imaging principle. The first receiving lens 2 and the planar industrial camera constitute the main field of view. Each pixel of the first planar industrial camera 1 detects aerosols at different distances in an angle-resolved manner.

[0057] The second receiving lens 3 receives the backscattered signal to form a second optical signal. The second planar industrial camera 4 acquires the second optical signal from the second receiving lens 3 to generate second optical information with corresponding distance and intensity. The plane of the second receiving lens, the plane of the second array detector of the second planar industrial camera, and the horizontal plane of the emitted light path satisfy the Saxony imaging principle. The second receiving lens 3 and the second planar industrial camera constitute a secondary field of view. Each pixel of the second planar industrial camera 4 detects aerosols at different distances in an angle-resolved manner.

[0058] The first and second optical information are synchronously transmitted to the signal processing system 6. The intensity of the first and second optical information is corrected by the ratio of the system constants of the main field of view and the sub-field of view. The second optical information is interpolated to match the resolution of the first optical information. The window width is set in the overlapping range of the two fields of view. The region with the highest correlation coefficient is searched as the optimal stitching interval. The intensity profile information of the entire detection range is obtained by using the average value of the first and second optical information in the optimal stitching interval.

[0059] In one embodiment, laser 5 emits a 520nm laser beam, which irradiates the aerosol, generating a backscattered signal. The backscattered signal enters the first receiving lens 2 and the second receiving lens 3, respectively, and after refraction, enters the first planar industrial camera 1 and the second planar industrial camera 4, respectively, to obtain signals containing distance intensity information. The signals generated by the first planar industrial camera 1 and the second planar industrial camera 4 are synchronously transmitted to the signal processing system 6, where they undergo signal intensity correction, distance resolution interpolation, and stitching fusion to generate intensity profile signals within the range of 0.28 to 10.83m.

[0060] Although embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art can make many other forms based on the guidance of this specification and without departing from the scope of protection of the claims of the present invention, and all of these are within the scope of protection of the present invention.

Claims

1. A dual-field-of-view aerosol detection optical system based on Saxony imaging, characterized in that, It includes, A laser that emits a laser beam toward the aerosol to be tested to form an emission optical path, wherein the laser beam irradiates the aerosol to be tested to generate a backscattered signal, and the emission optical path has an emission optical path horizontal plane; A first receiving lens receives the backscattered signal to form a first optical signal. The center of the first receiving lens is spaced a first distance from the horizontal plane of the emitted light path, and the plane of the first receiving lens where the first receiving lens is located forms a first angle with the horizontal plane of the emitted light path. The starting point of the detection distance is the intersection of a perpendicular line drawn from the center of the first receiving lens to the horizontal plane of the emitted light path. A first planar industrial camera acquires a first optical signal from a first receiving lens to generate first optical information with corresponding distance and intensity. The center of the array detector of the first planar industrial camera is spaced a second distance from the horizontal plane of the transmitting optical path, and there is a second included angle between the plane of the first receiving lens and the plane of the first array detector of the first planar industrial camera. The lowest point of the array detector of the first planar industrial camera is a first distance from the plane of the first receiving lens. The line connecting the center of the first array detector of the first planar industrial camera and the center of the first receiving lens is perpendicular to the plane of the first receiving lens. The plane of the first receiving lens, the plane of the first array detector of the first planar industrial camera, and the horizontal plane of the transmitting optical path intersect at a first straight line. A second receiving lens receives the backscattered signal to form a second optical signal. The center of the second receiving lens is spaced a third distance from the horizontal plane of the emitted light path, and the plane of the second receiving lens where the second receiving lens is located forms a third angle with the horizontal plane of the emitted light path. The second planar industrial camera acquires a second optical signal from a second receiving lens to generate second optical information with corresponding distance and intensity. The center of the second array detector of the second planar industrial camera is spaced a fourth distance from the horizontal plane of the transmitting optical path, and there is a fourth included angle between the plane of the second receiving lens and the plane of the second array detector of the second planar industrial camera. The lowest point of the array detector of the second planar industrial camera is a second distance from the plane of the second receiving lens. The line connecting the center of the second array detector of the second planar industrial camera and the center of the second receiving lens is perpendicular to the plane of the second receiving lens. The plane of the second receiving lens, the plane of the second array detector of the second planar industrial camera, and the horizontal plane of the transmitting optical path intersect at a second straight line. A signal processing system connects a first planar industrial camera and a second planar industrial camera to acquire first and second optical information. Based on the first and second optical information, it generates intensity profile information. The first spacing is greater than the third spacing, the second spacing is greater than the fourth spacing, the first distance is greater than the second distance, and the first included angle is greater than the third included angle. The plane of the first receiving lens, the plane of the area array detector of the first planar industrial camera, and the horizontal plane of the laser emission path intersect each other at a fixed angle. Each pixel of the first planar industrial camera detects aerosols at different distances in an angle-resolved manner. The first receiving lens and the first planar industrial camera constitute the main field of view. The plane of the first receiving lens, the first area array detector plane of the first planar industrial camera, and the plane of the laser emission path satisfy the Saxophone imaging principle. The second receiving lens and the second planar industrial camera constitute the secondary field of view. The plane of the second receiving lens, the second area array detector plane of the second planar industrial camera, and the plane of the laser emission path satisfy the Saxophone imaging principle. The main field of view detection range of the dual-field-of-view aerosol detection optical system is 1.45m to 10.83m, and the secondary field of view detection range is 0.29m to 2.05m.

2. The dual-field-of-view aerosol detection optical system based on Saxony imaging according to claim 1, characterized in that, The first spacing is 148.5 mm, the first included angle is 86.6°, the second spacing is 150 mm, the second included angle is 35.0°, and the first distance is 100 mm.

3. The dual-field-of-view aerosol detection optical system based on Saxony imaging according to claim 2, characterized in that, The third spacing is 74.7 mm, the third included angle is 81.0°, the fourth spacing is 75 mm, the fourth included angle is 30.0°, and the second distance is 40 mm.

4. The dual-field-of-view aerosol detection optical system based on Saxony imaging according to claim 1, characterized in that, The dual-field-of-view aerosol detection optical system has a resolution of 0.1 mm to 38.2 mm within a detection range of 0.29 m to 10.83 m.

5. The dual-field-of-view aerosol detection optical system based on Saxony imaging according to claim 1, characterized in that, The laser is a semiconductor laser.

6. The dual-field-of-view aerosol detection optical system based on Saxony imaging according to claim 1, characterized in that, The first receiving lens and the second receiving lens are cemented doublet achromatic lenses.

7. The dual-field-of-view aerosol detection optical system based on Saxony imaging according to claim 1, characterized in that, The signal processing system includes a correction unit for signal strength correction, an interpolation unit for distance resolution interpolation, and a fusion unit for signal splicing and fusion.

8. The detection method of the dual-field-of-view aerosol detection optical system based on Saxony imaging according to any one of claims 1-7, characterized in that, It includes, A laser emits a laser beam toward the aerosol to be tested, and the laser beam irradiates the aerosol to be tested to generate a backscattered signal. A first receiving lens receives the backscattered signal to form a first optical signal. A first planar industrial camera acquires the first optical signal from the first receiving lens to generate first optical information with corresponding distance and intensity. The plane of the first receiving lens, the plane of the first planar industrial camera's first array detector, and the horizontal plane of the emitted light path satisfy the Saxony imaging principle. The first receiving lens and the first planar industrial camera constitute the main field of view. Each pixel of the first planar industrial camera detects aerosols at different distances in an angle-resolved manner. The second receiving lens receives the backscattered signal to form a second optical signal. The second planar industrial camera acquires the second optical signal from the second receiving lens to generate second optical information with corresponding distance and intensity. The plane of the second receiving lens, the plane of the second array detector of the second planar industrial camera, and the horizontal plane of the emitted light path satisfy the Shapiro imaging principle. The second receiving lens and the second planar industrial camera constitute a secondary field of view. Each pixel of the second planar industrial camera detects aerosols at different distances in an angle-resolved manner. The first and second optical information are transmitted synchronously to the signal processing system. The intensity of the first and second optical information is corrected by the ratio of the system constants of the main field of view and the sub-field of view. The second optical information is interpolated to match the resolution of the main field of view. The window width is set in the overlapping area of ​​the detection range of the two fields of view. The area with the highest correlation coefficient is searched as the optimal stitching interval. The intensity profile information of the entire detection range is obtained by using the average value of the signals of the main field of view and the sub-field of view in the optimal stitching interval.

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