Imaging device

Abstract

The invention discloses an imaging device, and belongs to the technical field of monitoring devices. The imaging device comprises a box body, an infrared light-transmitting sheet, a short-wave infrared imaging assembly and a narrow-band pass filter, an observation window is arranged on one side of the box body, and cold air can be introduced into the box body; the infrared light-transmitting sheet is arranged at the observation window and can transmit a short-wave infrared spectrum; the short-wave infrared imaging assembly is arranged in the box body and is used for carrying out induction imaging on the short-wave infrared spectrum; the narrow-band-pass optical filter is arranged in the box body and is arranged on one side, close to the infrared light-transmitting sheet, of the short-wave infrared imaging assembly; the narrow-band-pass optical filter is used for selecting a spectrum in a preset range for imaging, and the preset range is located in an acquisition range of the short-wave infrared imaging assembly. The imaging device disclosed by the invention can be used for clearly imaging the aluminum plate blank under a complex working condition.

Description

Technical Field

[0001] This invention relates to the field of monitoring device technology, and more particularly to an imaging device. Background Technology

[0002] In automated hot rolling production lines for aluminum sheet and strip, deviation often occurs in multi-unit finishing mills, leading to industrial malfunctions such as tailing, material accumulation, and production line shutdowns. By imaging the aluminum slab, processing images are provided for subsequent steps of aluminum slab deviation detection and measurement. This allows for real-time monitoring of the aluminum slab's position, shape, and movement status, providing precise data support for deviation control. This prevents or quickly corrects deviation at its source, avoiding malfunctions such as tailing, material accumulation, and production line shutdowns.

[0003] However, due to the complex working conditions of aluminum slabs, such as high-speed movement, high temperature, water vapor, and emulsion obstruction, the interference of water vapor makes it difficult for existing optical imaging equipment to clearly image the aluminum slabs. Although ordinary infrared thermal imaging devices can image based on heat distribution, they are heavily affected by water vapor, surrounding high-temperature equipment, and emulsion, making subsequent inspection inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide an imaging device that can clearly image aluminum slabs under complex working conditions.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An imaging device, comprising:

[0007] The box has an observation window on one side, and the box is able to allow cold air to enter.

[0008] An infrared transmissive sheet is provided at the observation window, capable of transmitting short-wave infrared spectrum;

[0009] A short-wave infrared imaging component is disposed within the housing and is used for sensing and imaging the short-wave infrared spectrum;

[0010] A narrow-band pass filter is disposed within the housing and on the side of the short-wave infrared imaging component near the infrared light-transmitting sheet; the narrow-band pass filter is used to select a spectrum within a preset range for imaging, and the preset range is located within the acquisition range of the short-wave infrared imaging component.

[0011] In some embodiments, the side of the housing with the observation window has an air curtain opening, through which cold air from inside the housing flows out to form an air curtain.

[0012] In some embodiments, an extension plate is further included, which is disposed along a first direction on the side of the housing where the observation window is provided and is located above the infrared light-transmitting sheet; the extension plate is provided with a receiving space, an inlet and the air curtain opening, the receiving space is connected to the air outlet of the housing through the inlet, and the air curtain opening is disposed along a second direction on the side of the extension plate near the observation window, the first direction and the second direction being arranged at an angle.

[0013] In some embodiments, the shortwave infrared imaging component includes an indium gallium arsenide sensor for acquiring shortwave infrared signals in the wavelength range of 0.9µm-1.7µm.

[0014] In some embodiments, the infrared transmissive sheet is a glass-based infrared transmissive sheet, a crystal-based infrared transmissive sheet, a plastic infrared transmissive sheet, or a film composite infrared transmissive sheet.

[0015] In some embodiments, the narrowband pass filter has a center wavelength range of 1650nm±100nm, a half-bandwidth of less than 50nm, a peak transmittance greater than 80%, and a cutoff depth of OD4 or greater for stray light outside the passband in the spectral range of 300nm-2500nm.

[0016] In some embodiments, the infrared light-transmitting sheet covers the observation window, and the infrared light-transmitting sheet is sealed to the housing.

[0017] In some embodiments, the infrared light-transmitting sheet is connected to the housing via fasteners.

[0018] In some embodiments, an air inlet is provided on the side of the housing opposite to the observation window, through which cold air can flow into the housing.

[0019] In some embodiments, the housing has a channel on the side opposite to the observation window, through which a cable connected to the shortwave infrared imaging component passes for external electrical connection.

[0020] In some embodiments, the housing is provided with a self-cleaning module, which is used to clean the infrared light-transmitting sheet.

[0021] In some embodiments, the self-cleaning module includes a spraying assembly, a driving component, and a scraper. The spraying assembly is used to spray cleaning liquid onto the infrared light-transmitting sheet. The driving component is fixed to the housing. The scraper is connected to the output end of the driving component. The driving component drives the scraper to generate friction with the infrared light-transmitting sheet.

[0022] In some embodiments, a monitoring system is also included, wherein both the shortwave infrared imaging component and the self-cleaning module are communicatively connected to the monitoring system. The shortwave infrared imaging component transmits the acquired images to the monitoring system. When the contamination reaches a preset threshold, the monitoring system sends a command to the self-cleaning module to clean itself.

[0023] The beneficial effects of this invention are:

[0024] The present invention provides an imaging device in which cooled air is introduced into the box to maintain a positive pressure state inside the box. This is used to isolate the harsh environment of high temperature and high humidity and to remove the heat emitted by the short-wave infrared imaging component inside the box. This allows the imaging device to continuously and stably acquire data in the high temperature and high humidity environment between the mill stands.

[0025] The system employs a sequential arrangement of an infrared transmissive filter, a narrow-band pass filter, and a short-wave infrared imaging component. The infrared transmissive filter increases the transmittance of the short-wave infrared band, reduces interference from reflection and refraction of short-wave infrared light, and isolates the internal narrow-band pass filter and short-wave infrared imaging component from the external environment. The narrow-band pass filter selects a preset spectral range for imaging, thereby reducing interference from water vapor and surrounding equipment, resulting in clearer observation of targets such as aluminum slabs, with clearly visible edges. Through the dual-layer filtering design of the infrared transmissive filter and the narrow-band pass filter, the synergistic effect of the infrared transmissive filter, the narrow-band pass filter, and the short-wave infrared imaging component effectively eliminates interference from water vapor, emulsions, and surrounding equipment, enabling clear and stable imaging of the aluminum slab. Attached Figure Description

[0026] Figure 1 This is a perspective view of the imaging device provided in a specific embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of an imaging device provided in a specific embodiment of the present invention;

[0028] Figure 3 This is a front view of the imaging device provided in a specific embodiment of the present invention;

[0029] Figure 4 This is a rear view of the imaging device provided in a specific embodiment of the present invention;

[0030] Figure 5 This is an actual imaging effect diagram of the imaging device provided in a specific embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of an imaging device with a self-cleaning module provided in a specific embodiment of the present invention.

[0032] In the picture:

[0033] 100. Box body; 110. Air inlet; 120. Channel; 200. Infrared light transmittance sheet; 300. Short-wave infrared imaging component; 400. Narrow bandpass filter; 500. Extension plate; 510. Air curtain opening; 600. Self-cleaning module; 610. Drive component; 620. Scraper; 700. Support slide. Detailed Implementation

[0034] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] like Figures 1-6As shown, this embodiment provides an imaging device, including a housing 100, an infrared transmissive sheet 200, a short-wave infrared imaging component 300, and a narrow-bandpass filter 400. An observation window is provided on one side of the housing 100, allowing cold air to pass through. The infrared transmissive sheet 200 is located at the observation window and transmits short-wave infrared spectrum. The short-wave infrared imaging component 300 is located inside the housing 100 and is used to perform sensing and imaging of the short-wave infrared spectrum. The narrow-bandpass filter 400 is located inside the housing 100 and on the side of the short-wave infrared imaging component 300 near the observation window. The narrow-bandpass filter 400 is used to select a spectrum within a preset range for imaging, and the preset range is within the acquisition range of the short-wave infrared imaging component 300.

[0038] This embodiment uses the imaging device in the finishing mill stand of an automated hot rolling production line for aluminum sheet and strip as an example for illustrative purposes. The finishing mill stand is used to achieve hot finishing of aluminum slabs, and the observation target is the aluminum slab. Cooled air is introduced into the box 100 to maintain a positive pressure state inside the box 100. The box 100 forms a positive pressure cold air box, which is used to isolate the harsh environment of high temperature and high humidity between the finishing mill stands and to remove the heat emitted by the short-wave infrared imaging component 300 inside the box 100. This allows the imaging device to continuously and stably acquire data in the high temperature and high humidity environment between the finishing mill stands.

[0039] An infrared light-transmitting sheet 200 is installed on an observation window on one side of the housing 100. A narrow-bandpass filter 400 is positioned on the side of the short-wave infrared imaging component 300 near the infrared light-transmitting sheet 200, with the infrared light-transmitting sheet 200, narrow-bandpass filter 400, and short-wave infrared imaging component 300 arranged sequentially. The infrared light-transmitting sheet 200 increases the transmittance of the short-wave infrared band, reduces interference from reflection and refraction of short-wave infrared light, and isolates the narrow-bandpass filter 400 and short-wave infrared imaging component 300 inside the housing 100 from the external environment. The narrow-bandpass filter 400 is used to select a spectrum within a preset range for imaging, thereby weakening interference from water vapor and surrounding equipment, making the aluminum slab clearer and its edges clearly visible. Through the dual-layer filtering design of infrared light transmittance sheet 200 and narrow bandpass filter 400, the synergistic effect of infrared light transmittance sheet 200, narrow bandpass filter 400 and short-wave infrared imaging component 300 can effectively eliminate the interference of water vapor, emulsion and peripheral equipment on the imaging of aluminum slab, and can achieve clear and stable imaging of hot-rolled aluminum plates.

[0040] The imaging effect of high-speed moving aluminum slab is determined by the maximum frame rate of the short-wave infrared imaging component 300. The existing short-wave infrared imaging camera, as the short-wave infrared imaging component 300, can meet the imaging requirements of high-speed moving precision-rolled aluminum slab.

[0041] By using a positive pressure cold air box, an infrared light transmittance sheet 200, a short-wave infrared imaging component 300, and a narrow-band pass filter 400, clear imaging of observation targets such as aluminum slabs under complex working conditions is achieved. This provides processed images with less interference for subsequent steps of aluminum slab deviation detection and measurement, and further provides equipment support for the intelligentization of aluminum plate and strip hot rolling production lines.

[0042] The infrared light-transmitting sheet 200 can be a glass-based infrared light-transmitting sheet, a crystalline infrared light-transmitting sheet, a plastic infrared light-transmitting sheet, or a thin-film composite infrared light-transmitting sheet. All of these structures are existing technologies and will not be described in detail. In this embodiment, the infrared light-transmitting sheet 200 is a glass-based infrared light-transmitting sheet. Compared to crystalline infrared light-transmitting sheets such as calcium fluoride or germanium single crystals, glass-based infrared light-transmitting sheets have advantages such as lower cost and better processability.

[0043] An infrared transmissive sheet 200 covers the observation window and is sealed to the housing 100 to prevent moisture and other contaminants from entering the housing 100 and affecting the performance of the short-wave infrared imaging component 300 and the narrow-bandpass filter 400, thus impacting imaging quality. Optionally, a sealant or adhesive can be applied around the infrared transmissive sheet 200 and between it and the housing 100 to achieve a sealed connection. Optionally, the infrared transmissive sheet 200 can be connected to the housing 100 using fasteners, such as screws, so that the infrared transmissive sheet 200 on the observation window has the ability to transmit short-wave infrared spectrum and possesses pressure-bearing capacity and structural stability to withstand the positive pressure inside the housing 100.

[0044] Optionally, the narrowband pass filter 400 and the shortwave infrared imaging component 300 are assembled into a combination, which is then installed inside the housing 100. For example, the narrowband pass filter 400 can be connected to the lens via a threaded connection, etc., without limitation. The shortwave infrared imaging component 300 includes an indium gallium arsenide (InGaAs) sensor for acquiring shortwave infrared signals in the wavelength range of 0.9µm-1.7µm. The center wavelength (CWL) range of the narrowband pass filter 400 is 1650nm±100nm, the half-width at half-maximum (FWHM) is within 50nm, the peak transmittance is greater than 80%, and it has a cutoff depth of OD4 or higher for out-of-band stray light in the spectral range of 300nm-2500nm. By selecting the above materials and parameters for the infrared transmittance sheet 200, the shortwave infrared imaging component 300, and the narrowband pass filter 400, it can be further applied to the imaging of aluminum slabs, further improving the imaging effect. In other embodiments, parameters such as the center wavelength range of the narrowband pass filter 400 are selected based on the temperature of the observed target.

[0045] The housing 100 has an air curtain opening 510 on one side with an observation window. Cold air from inside the housing 100 flows out through the air curtain opening 510, forming an air curtain in front of the infrared light-transmitting sheet 200. This air curtain blocks environmental substances such as water vapor, oil, and emulsions, preventing contamination of the infrared light-transmitting sheet 200 and blowing away any adhering substances. It combines anti-contamination and self-cleaning effects, reducing maintenance costs and ensuring long-term stable operation of the infrared light-transmitting sheet 200 in complex and harsh environments. Furthermore, the air curtain fully utilizes the cold air flowing out of the housing 100, eliminating the need for an additional cleaning structure for the infrared light-transmitting sheet 200, thus simplifying the design.

[0046] In one embodiment, the imaging device further includes an extension plate 500, which is disposed along a first direction on the side of the housing 100 where the observation window is located, and above the infrared light-transmitting sheet 200. The extension plate 500 has a receiving space, an inlet, and an air curtain 510. The receiving space communicates with the air outlet of the housing 100 through the inlet and with the outside through the air curtain 510. The air curtain 510 is disposed along a second direction on the side of the extension plate 500 near the observation window, and the first and second directions are arranged at an angle. The housing 100 can be a hexahedron or any other arbitrary structure, without limitation. Figure 1 As shown, exemplarily, the box body 100 is a hexahedron with the first direction being the left-right direction and the second direction being the up-down direction. The extension plate 500 is located at the air outlet of the left side plate of the box body 100, which has an observation window. The inlet is located on the right side of the extension plate 500. The air outlet and the inlet are directly opposite each other and connected. The air curtain 510 is located on the lower side of the extension plate 500. The extension plate 500 has a blocking function, which can effectively block the upward flow of gas, so that the air curtain 510 blows the air curtain downward and acts on the infrared light-transmitting sheet 200, thereby improving the cleaning effect on the infrared light-transmitting sheet 200. Optionally, the extension plate 500 is located on any one of the left, right, and lower sides of the infrared light-transmitting sheet 200, so that the air curtain opening 510 blows out air curtains from any side of the infrared light-transmitting sheet 200 and acts on the infrared light-transmitting sheet 200. Alternatively, the extension plate 500 is arranged around the infrared light-transmitting sheet 200, and the extension plate 500 is provided with air curtain openings 510, so that the air curtain openings 510 blow out air curtains from all sides of the infrared light-transmitting sheet 200 and act on the infrared light-transmitting sheet 200, thereby blocking environmental substances such as water vapor, oil stains, and emulsions from the infrared light-transmitting sheet 200.

[0047] Optionally, the imaging device includes a cold air supply system, specifically comprising: a refrigeration module (including a refrigeration unit, evaporator, compressor, etc.), an air handling module (including a filter, dehumidification components, and a blower), a delivery and distribution module (including air ducts), a positive pressure control module (including a pressure sensor and a pressure relief valve), and a control and monitoring module (including a control cabinet and a thermostat). The process involves the refrigeration module cooling, purifying, and dehumidifying the outside air, followed by pressurization by the blower to form positive pressure cold air, which is then delivered to the target area through the air ducts. Simultaneously, the positive pressure control module and the control and monitoring module regulate the pressure, temperature, and humidity in real time. The cold air supply system has two outlets. One outlet is connected to the air inlet 110, used to supply cold air into the housing 100. The other outlet is located outside the housing 100, blowing cold air outside the housing 100. This ensures that both the inside and outside of the housing 100 are in a cold air environment, preventing condensation on the infrared translucent sheet 200 due to temperature differences.

[0048] Under high-load conditions, the camera of the short-wave infrared imaging component 300 is prone to overheating, such as... Figure 1 and Figure 4 As shown, an air inlet 110 is provided on the side of the housing 100 opposite to the observation window. Cold air can flow into the housing 100 from the air inlet 110. That is, an air inlet 110 is provided on the right side of the housing 100. Cold air flows in from the air inlet 110 on the right side of the housing 100 and flows out from the air curtain 510 on the left side of the housing 100. That is, cold air flows from the right side to the left side of the housing 100, so that the cold air is evenly filled inside the housing 100. The flow of cold air is used to remove the heat of the short-wave infrared imaging component 300, and the heat dissipation effect is good.

[0049] Optionally, the shortwave infrared imaging component 300 is equipped with aluminum fins to improve heat dissipation. Optionally, the aluminum fins are provided with cooling water channels, through which cooling water flows, further improving heat dissipation. Optionally, the imaging device also includes a water supply system, which can refer to existing technology and will not be described in detail here. The aluminum fins include inlets and outlets located at both ends of the cooling water channels, and the inlets and outlets are respectively connected to the water supply system via water pipes to achieve cooling water circulation.

[0050] like Figure 1 and Figure 4As shown, a channel 120 is provided on the side of the housing 100 opposite to the observation window. Cables connected to the short-wave infrared imaging component 300 pass through the channel 120 for external electrical connection. The short-wave infrared imaging component 300 includes an infrared detector, a signal processing system, etc., and needs to be electrically connected to an external power source to power the various modules within the component. Optionally, the short-wave infrared imaging component 300 also needs to be electrically connected to data processing equipment, control equipment, display equipment, and other possible auxiliary equipment to achieve normal operation and full functionality. In one embodiment, the housing 100 has two channels 120, i.e., two holes. One channel 120 is for the power cable to pass through, and the other channel 120 is for the data cable to pass through. Specific details are as described in the prior art and will not be repeated here. Furthermore, the two channels 120 can be sealed or not. Sealing prevents the cold air entering the housing 100 from escaping, ensuring that the cold air is effectively utilized. The sealing method can be by sealing with a sealing ring, or by applying sealant between the data cable and channel 120 after passing through the power cable and data cable.

[0051] When the imaging device is used for a long time, or in a poor environment, dust or other solid particles, machine oil, and emulsion may contaminate the infrared light-transmitting film 200. The short-wave infrared imaging component 300 is mainly used for sensing and imaging the short-wave infrared spectrum. When the infrared light-transmitting film 200 is contaminated, the contaminated area in the image may appear dark, affecting the image quality. In some embodiments, the housing 100 is provided with a self-cleaning module 600, which is used to clean the infrared light-transmitting film 200 to remove contaminants and ensure imaging effect. The self-cleaning module 600 includes a spraying component, a driving component 610, and a scraper 620. The spraying component is used to spray cleaning liquid onto the infrared light-transmitting film 200. The driving component 610 is fixed to the housing 100, and the scraper 620 is connected to the output end of the driving component 610. The driving component 610 drives the scraper 620 to generate friction with the infrared light-transmitting film 200. The spray assembly includes a reservoir, a power pump, and a nozzle. The reservoir and nozzle are connected by a conduit. The reservoir stores the cleaning solution, and the power pump draws and pressurizes the solution from the reservoir, causing it to spray out from the nozzle. The conduit is made of chemically resistant plastic to prevent corrosion by the cleaning solution and to ensure smooth, leak-free liquid flow.

[0052] For example, the driving component 610 is a cylinder, the scraper 620 is connected to the piston rod of the cylinder, the cylinder body is fixed to the housing 100, and the extension and retraction of the piston rod of the cylinder enables the scraper 620 to move back and forth on the infrared light-transmitting sheet 200. Alternatively, the driving component 610 is an electric push rod, which drives the scraper 620 to move relative to the infrared light-transmitting sheet 200. Alternatively, the driving component 610 is a motor or a rotary cylinder, which drives the scraper 620 to swing relative to the infrared light-transmitting sheet 200.

[0053] Furthermore, when the extension plate 500 is positioned above the infrared light-transmitting sheet 200, the drive member 610 and the scraper 620 are located to the left, right, or below the infrared light-transmitting sheet 200 to avoid structural interference. Taking the scraper 620 being located to the left of the infrared light-transmitting sheet 200 as an example, the drive member 610 can drive the scraper 620 to move left and right. The length of the scraper 620 is greater than or equal to the height of the infrared light-transmitting sheet 200, so that the scraper 620 can cover the entire infrared light-transmitting sheet 200 during movement, improving cleaning efficiency and ensuring that the infrared light-transmitting sheet 200 can be completely cleaned.

[0054] For example, the nozzle is mounted on the end of a robotic arm, an electric actuator, or the output end of a cylinder. The robotic arm can drive the nozzle to move. After the nozzle is in a preset position, such as directly in front of the infrared light-transmitting sheet 200, the nozzle sprays cleaning fluid onto the infrared light-transmitting sheet 200. The robotic arm can be a three-axis industrial robot. Alternatively, the nozzle can be fixedly mounted on a bracket so that it is positioned to the side of the infrared light-transmitting sheet 200, i.e., it does not block the front of the infrared light-transmitting sheet 200 to avoid affecting subsequent imaging. The nozzle has a certain tilt angle (adjusted according to the actual situation) to spray cleaning fluid onto the infrared light-transmitting sheet 200.

[0055] The housing 100 is also equipped with a support slide 700. The scraper 620 is slidably connected to the piston rod at the connection point of the support slide 700. If an extension rod is connected to the rear end of the scraper 620, the scraper 620 and the extension rod will form a T-shape. The extension rod is connected to the piston rod and is slidably connected to the groove of the support slide 700. Furthermore, the groove is a rectangular groove, and the extension rod is a rectangular rod. The rectangular rod is slidably connected to the rectangular groove, which on the one hand realizes the sliding connection, and on the other hand realizes circumferential limiting, restricting the rotation of the scraper 620. The structure is stable and reliable, ensuring that the scraper 620 has full contact with the infrared light-transmitting sheet 200, thereby ensuring the cleaning effect.

[0056] In one embodiment, the imaging device further includes a monitoring system. Both the short-wave infrared imaging component 300 and the self-cleaning module 600 are communicatively connected to the monitoring system. The short-wave infrared imaging component 300 transmits the acquired images to the monitoring system. When the contamination reaches a preset threshold, the monitoring system sends a command to the self-cleaning module 600 to perform cleaning. Specifically, the monitoring system includes an image processing module. The short-wave infrared imaging component 300 transmits the acquired images to the image processing module. The image processing module preprocesses the images, such as grayscale conversion, noise reduction, and edge enhancement. Then, it analyzes the images using image processing algorithms or deep learning models to identify and locate the contaminated areas in the images. The control module of the monitoring system determines whether contamination exists in the image and the degree and type of contamination based on the analysis results of the image processing module. For example, if the area of ​​the contaminated area in the image exceeds a certain threshold, or if the characteristics of the contamination match a preset stain type, cleaning is deemed necessary. The monitoring system sends a cleaning command to activate the power pump, robotic arm, and drive unit 610 of the self-cleaning module 600, enabling the spraying of cleaning fluid and cleaning in conjunction with the scraper 620. The image processing module processes the image, the image processing algorithm or deep learning model analyzes the image to identify and locate contamination areas on the image, and the control module determines whether contamination exists on the image and the degree and type of contamination based on the analysis results of the image processing module. These settings are all based on existing visual inspection systems and are therefore not elaborated further. The short-wave infrared imaging component 300 is used for both sensing and imaging the short-wave infrared spectrum and for contamination detection. These two processes are performed simultaneously, eliminating the need for an additional visual inspection system, thus simplifying the structure and reducing costs.

[0057] In other embodiments, the imaging device may also be equipped with a timer, such as a preset time of 4 hours, to automatically start the self-cleaning component for cleaning. The preset time can be set according to the needs and is not limited.

[0058] In one embodiment, the housing 100 is mounted on an adjustment platform, such as a one-dimensional, two-dimensional, or three-dimensional adjustment platform. During use, the position of the housing 100 can be adjusted by moving the platform according to the requirements of the application scenario, that is, adjusting the shooting angle of the infrared shortwave imaging component. The position adjustment is convenient. A two-dimensional adjustment platform is used as an example for illustration. A two-dimensional adjustment platform is a mechanical structure that can achieve precise displacement adjustment in two vertical directions (such as the X-axis and Y-axis). Its core is that through the coordination of the drive component, guide mechanism, and support platform, the housing 100 placed on the platform achieves position calibration, meeting the requirements of high-precision positioning.

[0059] The two-dimensional adjustment platform mainly includes a fixed base, an X-axis moving module mounted on the fixed base, and a Y-axis moving module connected to the output end of the X-axis moving module. A housing 100 is connected to the output end of the Y-axis moving module. The fixed base provides stable support, the X-axis moving module provides power for X-axis displacement, and the Y-axis moving module provides power for Y-axis displacement. The X-axis and Y-axis moving modules have identical structures, both including a lead screw and a nut that mates with the lead screw. One end of the lead screw is connected to an operating handle or a motor, and the nut serves as the output end. The Y-axis moving module is connected to the output end of the X-axis moving module, and the housing 100 is mounted on the output end of the Y-axis moving module. When the lead screw is connected to the operating handle, power is provided by manually rotating the handle; when the lead screw is connected to the motor, power is provided by motor drive. The two-dimensional adjustment platform also includes limiting structures and guiding structures, which are based on existing technology and will not be elaborated further. The structure and usage of the one-dimensional and three-dimensional adjustment platforms are the same as those of the two-dimensional adjustment platform, and will not be repeated here. The specific adjustment depends on the adjustment requirements. If the imaging device needs to be adjusted in one direction, the one-dimensional adjustment platform can be selected, as it has a simple structure and low cost. If the imaging device needs to be adjusted in two directions, the two-dimensional adjustment platform should be selected. If the imaging device needs to be adjusted in three directions, the three-dimensional adjustment platform should be selected.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An imaging device, characterized in that, include: The box (100) has an observation window on one side, and the box (100) is able to allow cold air to pass through; An infrared transmissive sheet (200) is provided at the observation window and is capable of transmitting short-wave infrared spectrum; A short-wave infrared imaging component (300) is disposed inside the housing (100) and is used to perform sensing imaging of the short-wave infrared spectrum; A narrow-band pass filter (400) is disposed inside the housing (100) and on the side of the short-wave infrared imaging component (300) near the infrared transmittance sheet (200); the narrow-band pass filter (400) is used to select a spectrum within a preset range for imaging, and the preset range is located within the acquisition range of the short-wave infrared imaging component (300).

2. The imaging device according to claim 1, characterized in that, The box (100) has an air curtain opening (510) on one side where the observation window is located, and the cold air inside the box (100) flows out from the air curtain opening (510) to form an air curtain.

3. The imaging device according to claim 2, characterized in that, It also includes an extension plate (500), which is disposed along a first direction on the side of the housing (100) where the observation window is provided, and is located above the infrared light-transmitting sheet (200); the extension plate (500) is provided with a receiving space, an inlet and the air curtain opening (510), the receiving space is connected to the air outlet of the housing (100) through the inlet, and the air curtain opening (510) is disposed along a second direction on the side of the extension plate (500) near the observation window, the first direction and the second direction are arranged at an angle.

4. The imaging device according to claim 1, characterized in that, The shortwave infrared imaging component (300) includes an indium gallium arsenide sensor for acquiring shortwave infrared signals in the wavelength range of 0.9µm-1.7µm.

5. The imaging device according to claim 1, characterized in that, The infrared light-transmitting sheet (200) is a glass infrared light-transmitting sheet, a crystal infrared light-transmitting sheet, a plastic infrared light-transmitting sheet, or a film composite infrared light-transmitting sheet.

6. The imaging device according to claim 1, characterized in that, The narrowband pass filter (400) has a center wavelength range of 1650nm±100nm, a half-bandwidth of less than 50nm, a peak transmittance greater than 80%, and a cutoff depth of OD4 or higher for stray light outside the passband in the spectral range of 300nm-2500nm.

7. The imaging apparatus according to claim 1, characterized in that, The infrared light-transmitting sheet (200) covers the observation window, and the infrared light-transmitting sheet (200) is sealed to the box body (100).

8. The imaging apparatus according to claim 7, characterized in that, The infrared light-transmitting sheet (200) is connected to the box body (100) around its perimeter by fasteners.

9. The imaging device according to claim 1, characterized in that, The box (100) has an air inlet (110) on the side opposite to the observation window, through which cold air can flow into the box (100).

10. The imaging apparatus according to claim 1, characterized in that, The housing (100) has a channel (120) on the side opposite to the observation window, through which a cable connected to the shortwave infrared imaging component (300) passes for electrical connection to the outside.

11. The imaging apparatus according to claim 1, characterized in that, The box body (100) is provided with a self-cleaning module (600), which is used to clean the infrared light-transmitting sheet (200).

12. The imaging apparatus according to claim 11, characterized in that, The self-cleaning module (600) includes a spraying assembly, a driving component (610), and a scraper (620). The spraying assembly is used to spray cleaning liquid onto the infrared light-transmitting sheet (200). The driving component (610) is fixed to the housing (100). The scraper (620) is connected to the output end of the driving component (610). The driving component (610) drives the scraper (620) to rub against the infrared light-transmitting sheet (200).

13. The imaging apparatus according to claim 11, characterized in that, It also includes a monitoring system. The short-wave infrared imaging component (300) and the self-cleaning module (600) are both connected to the monitoring system. The short-wave infrared imaging component (300) transmits the collected images to the monitoring system. When the contamination reaches a preset threshold, the monitoring system sends a command to make the self-cleaning module (600) clean.

Images