Smart multi-spectral imaging device applied to automatic airport of inspection unmanned aerial vehicle and calibration method of smart multi-spectral imaging device

Abstract

The invention relates to a smart multispectral imaging device applied to an automatic airport of an inspection unmanned aerial vehicle and a calibration method of the smart multispectral imaging device. The smart multispectral imaging device comprises a camera host, a first probe module, a second probe module, a first communication cable and a second communication cable, the first probe module and the second probe module are electrically connected with the camera host through a first communication cable; the camera host is electrically connected with the unmanned aerial vehicle through a second communication cable. According to the smart multi-spectral imaging device applied to the automatic airport of the inspection unmanned aerial vehicle, the problems of space integration, complex environment use, unmanned calibration and the like when a traditional multi-spectral camera is applied to an automatic hangar scene of the unmanned aerial vehicle are solved.

Description

Technical Field

[0001] The present invention relates to the field of spectral remote sensing technology, and in particular to a smart multi-spectral imaging device for use in automatic airport inspection by unmanned aerial vehicles and a calibration method thereof. Background Art

[0002] Traditional multispectral cameras generally use multi-channel technology, with each lens corresponding to a spectral imaging channel. They are of moderate size and weight, suitable for mounting on small and medium-sized drones. They also need to be installed with a downlink light sensor (DLS for short), which is responsible for collecting ambient light information, sending it to the camera and recording it in the form of metadata in the TIFF image captured by the camera for later radiation correction.

[0003] In order to meet the requirements of routine inspection, unmanned operation, and flexible deployment in application scenarios such as precision agriculture and forestry, ecological protection, etc., the UAV automatic hangar solution is gradually developing in the direction of small aircraft, high degree of intelligent task management, and richer requirements for task payload types. UAVs used in such scenarios are often equipped with typical payloads such as visible light and thermal infrared. At the same time, in order to ensure real-time obstacle avoidance and visual positioning effects, a considerable number of various sensors are installed on the fuselage. There is little "blank" space on the fuselage, and traditional multispectral cameras and DLS are difficult to integrate, install and use. Secondly, due to the principle of spectral remote sensing imaging, traditional multispectral cameras are mainly used in sunny weather, but because hangars are often placed outdoors and face sudden weather factors, it is also necessary to consider the impact of waterproof and dustproof on multispectral cameras. Finally, the field data acquisition of traditional multispectral cameras requires manual shooting of calibration plates before and after the drone takes off and lands to obtain real reflectivity images. The problem of calibration plate calibration needs to be solved in the drone hangar scene. Summary of the invention

[0004] The present invention aims to solve the technical problems in the prior art and provide a smart multi-spectral imaging device and a calibration method thereof for use in automatic airport inspection by unmanned aerial vehicles.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] A smart multi-spectral imaging device for use in inspection of unmanned aerial vehicle automated airports, comprising: a camera host, a first probe module, a second probe module, a first communication cable and a second communication cable; the first probe module and the second probe module are electrically connected to the camera host through the first communication cable respectively; the camera host is electrically connected to the unmanned aerial vehicle through the second communication cable;

[0007] The first communication cable is used to transmit image information captured by the first probe module and / or the second probe module to the camera host for processing;

[0008] The second communication cable is used to forward image data to a ground receiving terminal through the drone, and to forward control instructions to the camera host through the drone;

[0009] The first probe module and the second probe module respectively include: a lens assembly, a multi-bandpass filter, and a Bayer CMOS image sensor circuit board; the multi-bandpass filter is mounted on the lens assembly, and the lens assembly is fixed on the Bayer CMOS image sensor circuit board;

[0010] The first probe module and the second probe module are respectively arranged at the base of the arms on both sides of the drone body, and the lens assembly points to the ground below; an integrated component is arranged on the top of the drone, the upper part of the integrated component is connected to the camera host, and the lower part is connected to the first probe module and the second probe module.

[0011] In the above technical solution, the housing of the first probe module or the second probe module includes: a probe front housing and a probe rear cover; wherein:

[0012] The inner cavity of the front shell of the probe is provided with a mounting hole, and the Bayer CMOS image sensor circuit board is fixed to the front shell of the probe by screws;

[0013] A lens sealing ring is provided at the front end of the lens assembly, and the lens sealing ring is fixed to the outer wall of the lens assembly. After the lens assembly is assembled, the lens sealing ring is tightly fitted to the inner wall of the front end of the probe front shell;

[0014] A second external mounting hole is provided above the rear cover of the probe, and a boss structure is provided below. After being assembled with the front shell of the probe, the boss structure and the front shell of the probe clamp the Bayer CMOS image sensor circuit board in the middle; the first communication cable is connected to the lens assembly to establish image data communication.

[0015] In the above technical solution, the first communication cable is provided with a second cable sealing ring, which is fitted and limited with a circular cable passing opening formed by the front shell and the rear cover of the probe.

[0016] In the above technical solution, a first circuit board, a second circuit board and a third circuit board are provided in the camera host;

[0017] The first circuit board is located at the upper part, which is provided with a GPS module, a spectrum chip module, and a barometer;

[0018] The second circuit board is located in the middle, wherein a waterproof power interface and a TF card holder are provided; the first communication cable is electrically connected to the second circuit board through a socket; and the second circuit board is electrically connected to the first circuit board through a first inter-board connector;

[0019] The third circuit board is located at the bottom and is electrically connected to the second circuit board via a second inter-board connector, and is used for processing and controlling the first circuit board and the second circuit board.

[0020] In the above technical solution, the camera host comprises: an upper shell and a bottom shell;

[0021] The top surface of the upper shell is provided with a circular groove, and the diffusion sheet is embedded in the groove; the upper shell is provided with a light blocking ring, which is a circular ring-shaped protrusion with an inclined angle; and a slot cover plate is provided on the side of the upper shell;

[0022] The top of the bottom shell is provided with fixing screw holes for circuit components and a heat-conducting boss for contacting the heating element. The middle part of the bottom of the bottom shell is provided with a guide groove with raised sides and a recessed middle part; and external mounting holes are provided around the bottom shell.

[0023] In the above technical solution, the upper shell and the bottom shell are assembled and fixed by screws, the assembly contact surface is coated with sealant, and two semicircular notches are provided on the side of the upper shell. After the shell is assembled, the notches fit tightly with the first cable sealing ring.

[0024] In the above technical solution, the upper shell is made of plastic and the bottom shell is made of metal.

[0025] In the above technical solution, a positioning QR code and a calibration plate are provided on the surface of the hangar platform where the UAV is parked.

[0026] A calibration method for a smart multi-spectral imaging device for use in an automatic airport inspection using a drone includes the following steps:

[0027] First, the drone takes off autonomously and controls the camera host to enter the calibration plate shooting state. At this time, the camera host will collect images in the field of view. After detecting the positioning QR code, the camera host preliminarily determines the location of the calibration plate based on the position of the positioning QR code.

[0028] Then, the flight action of the drone is controlled in reverse, and the calibration plate is placed in the center of the multi-spectral camera's field of view by controlling the position of the drone. At this time, the camera host will automatically take pictures to complete the shooting task of the calibration plate.

[0029] In the above technical solution, the calibration method is used for visual guidance of autonomous landing of the UAV. The camera host sends the real-time feedback video of the first probe module and the second probe module to the UAV end, determines the downward viewing space state by locating the QR code, and adjusts the UAV posture by relative position judgment.

[0030] The present invention has the following beneficial effects:

[0031] The smart multispectral imaging device for the inspection of UAV automatic airports of the present invention solves the problems of spatial integration, use in complex environments, and unmanned calibration faced by traditional multispectral cameras in the application of UAV automatic hangar scenarios, including:

[0032] (1) The probe module can be replaced according to different application scenarios.

[0033] (2) The stable connection problem of the split camera structure is solved.

[0034] (3) Solved the heat dissipation problem of camera heating elements.

[0035] (4) By integrating DLS with the camera, complex operation and installation issues are avoided and lightweight is achieved.

[0036] Specifically:

[0037] 1. Imaging Device

[0038] (1) The probe module of the device is connected to the camera host through a cable and can be removed and replaced, so that probe modules with different focal lengths, resolutions, optical spectrum center wavelengths and bandwidths can be replaced for different application scenarios, thereby increasing the application range and solving the cost problem;

[0039] (2) The camera host of the device integrates GPS and spectral chip modules, so there is no need to install DLS when using it, which simplifies operation and reduces structural weight;

[0040] (3) The core CPU component with high heat generation in the camera host of the device is designed to be in contact with the metal bottom shell at the bottom, and is equipped with a bottom guide groove to allow the air flowing through the surface to quickly remove the heat, thereby avoiding high temperature of the component, affecting processing performance, and shortening the life of the component;

[0041] (4) The upper shell of the device host is made of plastic to avoid interference with GPS;

[0042] (5) A light-blocking ring structure is provided around the diffuser to reduce the cosine error when the solar radiation is incident at a large angle, thus improving the accuracy of solar radiation observation;

[0043] (6) The cable sealing ring is provided with a groove to limit and fix it along the edge of the shell to prevent the cable from being pulled and affecting the internal socket.

[0044] 2. UAV automatic airport use

[0045] (1) The camera host of the device is separated from the probe module for image acquisition and connected by a freely bendable communication cable. Both the camera host and the probe are provided with external mounting holes. The probe is small in size and light in weight, and can be integrated into a hangar version of a small UAV and other application scenarios.

[0046] (2) The communication cable ends of the device are all equipped with cable sealing rings, the housing assembly contact surface is coated with sealant, and the power supply port uses a waterproof power socket, which can play a waterproof and dustproof role and achieve IP54 level protection. In addition, the inner ring of the light-blocking ring around the diffuser is a sloped structure. The aerodynamic effect during flight can make rainwater flow out smoothly along the slope, which has a certain ability to cope with sudden weather conditions;

[0047] (3) The method of interaction between the device and the drone realizes the unmanned calibration board calibration operation.

[0048] (4) The probe module and DLS are placed on the upper and lower surfaces of the integrated component, with a common installation reference, which can ensure the same installation angle and compensate for the forward tilt of the drone during flight, so that the DLS optical axis always points to the dome and the probe module optical axis remains vertical to the ground, further ensuring the camera measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] Figure 1 The present invention is a schematic structural diagram of a smart multi-spectral imaging device for use in automatic airport inspection using unmanned aerial vehicles.

[0051] Figure 2 for Figure 1 The figure shows a three-dimensional schematic diagram of a compact multispectral imaging device for use in automatic airport inspection using drones.

[0052] Figure 3 for Figure 1 The diagram shown is a disassembled structural diagram of the camera host part of a compact multi-spectral imaging device for use in automatic airport inspection using drones.

[0053] Figure 4 for Figure 1 The diagram shown is a schematic diagram of the structural relationship between the camera host and communication cables of a compact multispectral imaging device for use in automatic airport inspections using drones.

[0054] Figure 5 for Figure 1 The diagram shown is a disassembled structural diagram of the first probe module part of a compact multi-spectral imaging device for use in automatic airport inspection using unmanned aerial vehicles.

[0055] Figure 6 for Figure 1 The structure diagram shown is a dexterous multispectral imaging device for automatic airport inspection by drones installed on a drone.

[0056] Figure 7 For application Figure 1 The figure shows a schematic flow chart of the steps for calibrating a multispectral camera of an unmanned aerial vehicle automated airport using a smart multispectral imaging device for use in inspecting unmanned aerial vehicle automated airports.

[0057] The reference numerals in the figures indicate:

[0058] 1- camera host; 2- first communication cable; 3- first probe module; 4- second probe module; 5- side obstacle avoidance sensor; 6- drone; 7- front obstacle avoidance sensor; 8- integrated component; 9- second communication cable; 10- hangar platform; 11- positioning QR code; 12- calibration board;

[0059] 101-diffuser; 102-light blocking ring; 103-upper shell; 104-card slot cover; 105-first circuit board; 106-waterproof power interface; 107-second circuit board; 108-TF card holder; 109-third circuit board;

[0060] 110- bottom shell; 111- heat-conducting boss; 112- first external mounting hole; 113- second inter-board connector; 114- first inter-board connector; 115- GPS module; 116- spectrum chip module; 201- cable outer rubber sleeve; 202- first cable sealing ring;

[0061] 301-probe back cover; 302-multi-bandpass filter; 303-lens assembly; 304-lens sealing ring; 305-probe front shell; 306-Bayer CMOS image sensor circuit board; 307-second cable sealing ring. DETAILED DESCRIPTION

[0062] The inventive concept of the present invention is:

[0063] In the smart multi-spectral imaging device for inspection of unmanned aerial vehicle automatic airports of the present invention, two multi-spectral imaging modules (hereinafter referred to as "probe modules" due to the flexibility of installation position) based on the spatial spectrum-coupling principle (through the combination of multi-bandpass filters and Bayer CMOS image sensors) are connected to the host. Each probe module is matched with the Bayer color filter layer of the CMOS image sensor through the multi-bandpass filter, and 3 to 4 spectral images can be obtained simultaneously. The two probe modules have external trigger signals that can be used for synchronization. The collected image information is transmitted to the host image processing board through a communication cable for decoupling processing, and the obtained spectral image data is transmitted to the cloud server through the unmanned aerial vehicle communication link; the communication cable brings together the power supply, trigger, and image transmission bus; the ambient light is collected by the spectral chip through the diffuser, and is transmitted to the image processing board through the inter-board connector together with the GPS and barometer altitude information for data fusion. The power socket is an external electrical interface, used for powering the camera and communicating with external devices. The TF card holder can be used to insert a memory card for camera image cache. If the drone encounters a link signal problem midway, the camera image can be resumed after the drone returns to the hangar. It can also store log files for fault interpretation, etc. The bottom shell of the camera conducts heat and cools the core heating components at the bottom.

[0064] The present invention is described in detail below with reference to the accompanying drawings.

[0065] like Figure 1 and 2 As shown, the dexterous multispectral imaging device for inspection of drone automatic airports of the present invention includes: a camera host 1, a first probe module 3, a second probe module 4, a first communication cable 2 and a second communication cable 9; the first probe module 3 and the second probe module 4 are electrically connected to the camera host 1 through the first communication cable 2 respectively; the camera host 1 is electrically connected to the drone 6 through the second communication cable 9.

[0066] like Figure 3 and 4 As shown, the camera host 1 includes: an upper shell 103 and a bottom shell 110, and the circuit board assembly (including a first circuit board 105, a second circuit board 107 and a third circuit board 109) is fixed to the bottom shell 110 respectively. Specifically: the upper shell 103 is made of plastic, and a circular groove is provided on the top surface, and a circular diffuser 101 is embedded in the groove; the upper shell 103 is provided with a light blocking ring 102, which is a circular protrusion with an inclined angle. On the side of the upper shell 103, a slot cover plate 104 is provided, which is fixed and disassembled by screws.

[0067] The bottom shell 110 is made of metal. The top of the bottom shell 110 has fixing screw holes for circuit components and a heat-conducting boss 111 for contacting the heating element. The middle of the bottom of the bottom shell 110 is provided with a guide groove, which is a structure with raised sides and a recessed middle. The bottom shell 110 is surrounded by first external mounting holes 112.

[0068] The upper shell 103 and the bottom shell 110 are assembled and fixed by screws, and the assembly contact surface is coated with sealant. Two semicircular notches are provided on the side of the upper shell 103. After the shell is assembled, the notches fit tightly with the first cable sealing ring 202; specifically: the first cable sealing ring 202 is fixed to the outer rubber sleeve 201 of the cable without displacement, and there is a groove in the middle of the first cable sealing ring 202. The shell of the camera host 1 is clamped into the groove along the edge to limit and fix it.

[0069] The camera host 1 includes three circuit board assemblies, specifically: the first circuit board 105 is located at the top, which is provided with a GPS module 115, a spectrum chip module 116, and a barometer. The second circuit board 107 is located in the middle, which is provided with a waterproof power interface 106 and a TF card holder 108. The first communication cable 2 is electrically connected to the second circuit board 107 through a socket, and the two are detachable. The second circuit board 107 is electrically connected to the first circuit board 105 through a first inter-board connector 114. The third circuit board 109 is located at the bottom, and is electrically connected to the second circuit board 107 through a second inter-board connector 113, and is used to process and control the first circuit board 105 and the second circuit board 107.

[0070] The first probe module 3 and the second probe module 4 differ only in the multi-bandpass filter 302 they are matched with, and other parameters and structures are the same. Here, only the structural scheme of the first probe module 3 is described.

[0071] like Figure 5 As shown, the first probe module 3 includes: a lens assembly 303, a multi-bandpass filter 302, and a Bayer CMOS image sensor circuit board 306; wherein the multi-bandpass filter 302 is mounted on the lens assembly 303, and the lens assembly 303 is fixed on the Bayer CMOS image sensor circuit board 306, and the three form a whole. The housing of the first probe module 3 includes: a probe front shell 305 and a probe rear cover 301, both of which are fixed by screws, and the assembly contact surface is coated with sealant, wherein the probe front shell 305 is made of plastic material, the inner cavity of the probe front shell 305 is provided with a mounting hole, and the Bayer CMOS image sensor circuit board 306 is fixed to the probe front shell 305 by screws. A lens sealing ring 304 is provided at the front end of the lens assembly 303, and the lens sealing ring 304 does not move after being fixed to the outer wall of the lens assembly 303. After the lens assembly 303 is assembled, the lens sealing ring 304 is tightly fitted to the inner wall of the front end of the probe front shell 305.

[0072] A second external mounting hole is provided above the probe back cover 301 of the first probe module 3, and a boss structure is provided below. After being assembled with the probe front shell 305, the boss structure and the probe front shell 305 clamp the Bayer CMOS image sensor circuit board 306 in the middle. The first communication cable 2 is connected to the lens assembly 303 to establish image data communication. The first communication cable 2 is provided with a second cable sealing ring 307, which is fitted and limited with the circular wire-passing opening formed by the probe front shell 305 and the probe back cover 301 of the first probe module 3. The structural form of the second cable sealing ring 307 is the same as that of the first cable sealing ring 202.

[0073] like Figure 6 As shown, the camera host 1 and the first probe module 3 and the second probe module 4 provide an integrated component fixed to the drone 6. Specifically, the first probe module 3 and the second probe module 4 are respectively arranged at the base of the arms on both sides of the drone 6, and the lens assembly 303 points to the ground below, avoiding the front obstacle avoidance sensor 7 and the side obstacle avoidance sensor 5 on the drone 6. The integrated component 8 is placed on the top of the drone 6, with the camera host 1 fixed on the upper part and the first probe module 3 and the second probe module 4 fixed on the lower part.

[0074] Two first communication cables 2 are provided to establish an electrical connection between the camera host 1 and the first probe module 3 and the second probe module 4, and are used to transmit the image information captured by the first probe module 3 and the second probe module 4 to the camera host 1 for processing. The second communication cable 9 connects the camera host 1 and the drone 6, and is used to forward the image data to the ground receiving end through the drone 6, and to forward the control instructions to the camera host 1 through the drone 6.

[0075] like Figure 6 As shown, on the surface of the hangar platform 10 where the drone 6 is parked, there are provided a positioning QR code 11 and a calibration plate 12 for multi-spectral camera calibration. When performing a shooting task, the camera host 1 needs to first shoot the calibration plate 12 for calibration.

[0076] The present invention also provides a calibration method suitable for the above-mentioned smart multi-spectral imaging device for use in automatic airport inspection by unmanned aerial vehicles.

[0077] like Figure 7 As shown, the calibration method of the smart multi-spectral imaging device for the application of the automatic airport inspection drone of the present invention comprises the following steps:

[0078] First, the drone 6 takes off autonomously and controls the camera host 1 to enter the shooting state of the calibration plate 12. At this time, the camera host 1 will collect images in the field of view. After detecting the positioning QR code 11, the camera host 1 preliminarily determines the location of the calibration plate 12 according to the position of the positioning QR code 11;

[0079] Then, the flight action of the drone 6 is reversely controlled, and the calibration plate 12 is placed at the center of the multi-spectral camera field of view by controlling the position of the drone 6. At this time, the camera host 1 will automatically take pictures to complete the shooting task of the calibration plate 12.

[0080] At the same time, this method can also be used for visual guidance of autonomous landing of the UAV 6. The camera host 1 sends the real-time feedback video of the first probe module 3 and the second probe module 4 to the UAV 6. The downward viewing space state can be determined by locating the QR code 11, and the posture of the UAV 6 can be adjusted by relative position judgment to achieve a safe landing.

[0081] In addition, a physical prototype was designed to verify that the method of the present invention is practical and effective.

[0082] The present invention is a smart multi-spectral imaging device for use in automatic airport inspection by unmanned aerial vehicles:

[0083] (1) The probe module can be replaced according to different application scenarios.

[0084] (2) The stable connection problem of the split camera structure is solved.

[0085] (3) Solved the heat dissipation problem of camera heating elements.

[0086] (4) By integrating DLS with the camera, complex operation and installation issues are avoided and lightweight is achieved.

[0087] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A smart multi-spectral imaging device for use in automatic airport inspection by unmanned aerial vehicles, characterized in that: include: A camera host (1), a first probe module (3), a second probe module (4), a first communication cable (2) and a second communication cable (9); the first probe module (3) and the second probe module (4) are electrically connected to the camera host (1) via the first communication cable (2); the camera host (1) is electrically connected to the drone (6) via the second communication cable (9); The first communication cable (2) is used to transmit image information captured by the first probe module (3) and / or the second probe module (4) to the camera host (1) for processing; The second communication cable (9) is used to forward the image data to a ground receiving end via the drone (6), and to forward control instructions to the camera host (1) via the drone (6); The first probe module (3) and the second probe module (4) respectively comprise: a lens assembly (303), a multi-bandpass filter (302), and a Bayer CMOS image sensor circuit board (306); the multi-bandpass filter (302) is mounted on the lens assembly (303), and the lens assembly (303) is fixed on the Bayer CMOS image sensor circuit board (306); The first probe module (3) and the second probe module (4) are respectively arranged at the base of the arms on both sides of the drone (6) fuselage, and the lens assembly (303) points to the ground below; an integrated component (8) is arranged on the top of the drone (6), and the upper part of the integrated component (8) is connected to the camera host (1), and the lower part is connected to the first probe module (3) and the second probe module (4).

2. The smart multi-spectral imaging device for use in automatic airport inspection by unmanned aerial vehicles according to claim 1 is characterized in that: The housing of the first probe module (3) or the second probe module (4) comprises: a probe front housing (305) and a probe rear cover (301); wherein: The inner cavity of the probe front shell (305) is provided with a mounting hole, and the Bayer CMOS image sensor circuit board (306) is fixed to the probe front shell (305) by screws; A lens sealing ring (304) is provided at the front end of the lens assembly (303), and the lens sealing ring (304) is fixed to the outer wall of the lens assembly (303). After the lens assembly (303) is assembled, the lens sealing ring (304) is tightly fitted to the inner wall of the front end of the probe front shell (305); A second external mounting hole is provided above the probe rear cover (301), and a boss structure is provided below. After being assembled with the probe front shell (305), the boss structure and the probe front shell (305) clamp the Bayer CMOS image sensor circuit board (306) in the middle; the first communication cable (2) is connected to the lens assembly (303) to establish image data communication.

3. The smart multi-spectral imaging device for use in automatic airport inspection by unmanned aerial vehicles according to claim 2 is characterized in that: The first communication cable (2) is provided with a second cable sealing ring (307) which is fitted and restricted with a circular cable passage formed by the probe front shell (305) and the probe rear cover (301).

4. The smart multi-spectral imaging device for use in automatic airport inspection by unmanned aerial vehicles according to claim 1, characterized in that: The camera host (1) is provided with a first circuit board (105), a second circuit board (107) and a third circuit board (109); The first circuit board (105) is located at the upper part and is provided with a GPS module (115), a spectrum chip module (116), and a barometer; The second circuit board (107) is located in the middle, and is provided with a waterproof power interface 106 and a TF card socket 108; the first communication cable (2) and the second circuit board (107) are electrically connected via a socket; the second circuit board (107) and the first circuit board (105) are electrically connected via a first inter-board connector (114); The third circuit board (109) is located at the bottom and is electrically connected to the second circuit board (107) via a second inter-board connector (113) for processing and controlling the first circuit board (105) and the second circuit board (107).

5. The smart multi-spectral imaging device for use in automatic airport inspection by unmanned aerial vehicles according to claim 1, characterized in that: The camera host (1) comprises: an upper shell (103) and a bottom shell (110); The top surface of the upper shell (103) is provided with a circular groove, and the diffusion sheet (101) is embedded in the groove; the upper shell (103) is provided with a light blocking ring (102), and the light blocking ring (102) is a circular ring-shaped protrusion with an inclined angle; and a slot cover plate (104) is provided on the side of the upper shell (103); The bottom shell (110) has screw holes for fixing circuit components and a heat-conducting boss (111) for contacting a heating element on the top, and a guide groove with a structure of protrusions on both sides and a depression in the middle is provided in the middle of the bottom of the bottom shell (110); and external mounting holes (112) are provided around the bottom shell (110).

6. The smart multi-spectral imaging device for use in inspection of drone automated airports according to claim 5, characterized in that: The upper shell (103) and the bottom shell (110) are assembled and fixed by screws, and the assembly contact surface is coated with sealant. Two semicircular notches are provided on the side of the upper shell (103). After the shell is assembled, the notches are tightly fitted with the first cable sealing ring (202).

7. The smart multi-spectral imaging device for use in inspection of drone automated airports according to claim 5, characterized in that: The upper shell (103) is made of plastic material, and the bottom shell (110) is made of metal material.

8. The smart multi-spectral imaging device for use in inspection of drone automated airports according to claim 1, characterized in that: A positioning two-dimensional code (11) and a calibration plate (12) are provided on the surface of a hangar platform (10) where the unmanned aerial vehicle (6) is parked.

9. A calibration method for a smart multi-spectral imaging device for use in an automatic airport inspection drone according to claim 8, characterized in that: The following steps are involved: First, the drone (6) takes off autonomously and controls the camera host (1) to enter the calibration plate (12) shooting state. At this time, the camera host (1) collects images in the field of view, and after detecting the positioning QR code (11), the camera host (1) preliminarily determines the location of the calibration plate (12) according to the location of the positioning QR code (11); Then, the flight action of the drone (6) is reversely controlled, and the calibration plate (12) is placed at the center of the multi-spectral camera field of view by controlling the position of the drone (6). At this time, the camera host (1) automatically takes a photo, completing the shooting task of the calibration plate (12).

10. The calibration method according to claim 9, characterized in that: The calibration method is used for visual guidance of autonomous landing of a drone (6). The camera host (1) sends the video fed back in real time by the first probe module (3) and the second probe module (4) to the drone (6), determines the state of the downward-looking space by locating a two-dimensional code (11), and adjusts the posture of the drone (6) by relative position judgment.

Images