Miniaturized integrated laser range gating imaging system

Abstract

The invention belongs to the technical field of laser range gating imaging systems, and particularly relates to a miniaturized integrated laser range gating imaging system which comprises an outer shell assembly, an inner supporting assembly, a laser emitting module, a laser receiving module, an imaging control module, an image processing module and a power supply module. The method is used for acquiring a target transient image in an underwater test. The system is characterized in that the outer shell assembly provides shell protection for the system, on one hand, the inner supporting assembly is connected with the end face of the outer shell assembly and attached to the outer shell assembly in the circumferential direction, the heat dissipation efficiency is improved while the structural strength is guaranteed, and on the other hand, the interior of a cavity is divided into a plurality of spaces which do not interfere with one another and used for installing a plurality of internal photoelectric modules. The internal space of the cavity is utilized to the maximum extent, the photoelectric modules are all installed on the inner supporting assembly, debugging and installation before system integration are facilitated, and the system is suitable for integrated design of various imaging systems.

Description

Technical Field

[0001] This invention belongs to the technical field of laser range gating imaging systems, specifically relating to a miniaturized integrated laser range gating imaging system. Background Technology

[0002] In underwater testing, due to the darkness of the underwater environment, laser illumination is required to illuminate the target. Laser range-gated imaging technology uses the instantaneous opening and closing of the imaging detector shutter to block backscattered light in the laser imaging path and capture transient images of the target. The laser range-gated imaging system includes multiple modules such as a laser emitting module, a laser receiving module, an imaging control module, an image processing module, and a power supply module. Because it is used underwater, all modules must be enclosed in a sealed chamber with sufficient pressure resistance. Simultaneously, considering the buoyancy of water, the overall weight of the system needs to be roughly equivalent to the buoyancy; therefore, the volume of the internal modules must be minimized to reduce the volume of the sealed chamber and the amount of water displacement. Currently, there is a lack of integrated design technology for miniaturized laser range-gated imaging systems that can highly integrate opto-mechanical systems within a sealed space, comprehensively considering structural strength, internal heat dissipation, optical path control, and wiring design to meet the requirements of the harsh underwater testing environment. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] The technical problem to be solved by this invention is: how to provide a miniaturized and integrated laser range-gated imaging system, which integrates the opto-electro-mechanical modules inside the system in a closed space, and comprehensively considers structural strength, internal heat dissipation, optical path control and wiring design, so as to meet the needs of acquiring transient images of targets in underwater testing.

[0005] (II) Technical Solution

[0006] To solve the above technical problems, the present invention provides a miniaturized integrated laser range gating imaging system, which includes: an outer shell assembly (1), an inner support assembly (2), a laser emitting module (3), a laser receiving module (4), an imaging control module (5), an image processing module (6), and a power supply module (7).

[0007] The outer shell assembly (1) is a sealed cylindrical cavity structure that integrates all other structural components and optoelectronic modules inside the cavity; one end of the outer shell assembly (1) serves as the light transmission window for the laser emitting module (3) and the laser receiving module (4), and the other end is connected to the inner support assembly (2) through the adapter bracket (21);

[0008] The inner support assembly (2) divides the cavity into upper and lower layers for installing the laser emitting module (3) and the laser receiving module (4), and connects the imaging control module (5), the image processing module (6) and the power supply module (7) through multiple adapter plates (24), integrating the optoelectronic modules required by the system onto the inner support assembly (2).

[0009] The outer shell assembly (1) includes a front panel (11), a cylindrical shell (12), and a rear panel (13);

[0010] The front panel (11) and rear panel (13) are provided with countersunk holes evenly distributed in the circumference, which are threaded to the end face of the cylindrical shell (12) to form a closed cylindrical cavity.

[0011] The front panel (11) has two circular openings, which serve as light transmission windows for the laser emitting module (3) and the laser receiving module (4);

[0012] The rear panel (13) is connected to the adapter bracket (21) in the inner support assembly (2), and is connected to the base plate (22) and the second layer plate (23); since the imaging system is used for underwater testing, all connections of the outer shell assembly (1) are water-sealed by double-layer sealing strips.

[0013] Among them, such as Figure 3 As shown, the inner support assembly (2) is a frame structure composed of multiple panels, including a transfer bracket (21), a base plate (22), a second-layer plate (23), and multiple transfer plates (24). The transfer bracket (21) connects the base plate (22) and the second-layer plate (23) to the outer shell assembly (1) by thread. The base plate (22) and the second-layer plate (23) cut the internal space of the cavity along the axial direction. The transfer plates (24) cut the internal space of the cavity perpendicular to the axial direction. The inner support assembly (2) divides the cavity into multiple non-interfering spaces for installing multiple optoelectronic modules of the system.

[0014] The base plate (22) is threadedly connected to the adapter bracket (21). The side facing the inner side of the cavity is the first optical plane (221), which is used to install the laser emitting module (3) and is provided with multiple elliptical weight reduction grooves. The side of the base plate (22) facing the outer side of the cavity is an arc-shaped curved surface (223), which is attached to the inner wall of the cylindrical shell (12) to conduct the heat generated by the laser emitting module (3) to the outer side of the cavity, while improving the coaxiality and connection strength between the base plate (22) and the outer shell assembly (1). Multiple elliptical weight reduction grooves (222) are provided on the base plate (22) to reduce the structural weight and improve the heat dissipation efficiency by increasing the heat dissipation surface.

[0015] Among them, the second plate (23) is threaded to the adapter bracket (21) along the axial direction on the one hand, and to the stud of the base plate (22) on the other hand, which increases the structural strength and ensures the parallelism between the second plate (23) and the base plate; the side of the second plate facing the inner side of the cavity is the second optical plane (231), which is used to install the laser receiving module (4); the side wall of the second plate is threaded to multiple adapter plates (24), which are used to install the imaging control module (5), the image processing module (6) and the power supply module (7).

[0016] Among them, the second-layer plate (23) and the adapter plate (24) are mostly hollow frame structures, which reduce the structural weight and facilitate the connection of lines and data transmission between multiple optoelectronic modules.

[0017] The laser emitting module (3) includes a laser source and an emitting optical system. The laser source provides nanosecond-level, high peak power (to improve penetration in water) pulsed laser, and the irradiation range is increased through the emitting optical system.

[0018] The laser receiving module (4) includes an ultra-fast shutter gain detector (ICCD) and a receiving optical system. The detector has a nanosecond-level ultra-fast shutter and performs time-synchronized detection with the laser pulse. The receiving optical system is responsible for receiving the reflected light and can adjust the parameters of focal length, focus, and aperture according to the detection distance requirements.

[0019] The imaging control module (5) is responsible for high-precision time synchronization of the laser pulse signal of the laser emitting system and the detector shutter of the laser receiving system. Through internal high-precision timing, it controls the detector to be selected after a specific delay to complete the imaging process. The imaging control module is also responsible for the conversion of imaging modes and the timing encoding of different imaging modes.

[0020] The image processing module (6) is responsible for image reception, image processing, image transmission, video encoding and decoding, and video storage; the image processing module has an embedded GPU chip and has image processing and target recognition algorithm functions.

[0021] The power supply module (7) provides power to all other internal modules.

[0022] (III) Beneficial Effects

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This invention provides an integrated design technology for a miniaturized laser distance-gated imaging system, wherein the outer shell assembly provides shell protection for the system, and the inner support assembly is connected to the end face of the outer shell assembly and circumferentially attached to it, ensuring structural strength while improving heat dissipation efficiency. On the other hand, it divides the cavity into multiple non-interfering spaces for installing multiple internal optoelectronic modules, maximizing the utilization of the cavity's internal space.

[0025] 2. The integrated design technology of the miniaturized laser distance-gated imaging system provided by the present invention has all photoelectric modules installed on the internal support component, which facilitates debugging and installation before system integration and is applicable to the integrated design of various imaging systems. Attached Figure Description

[0026] Figure 1 A system composition diagram of an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the external three-dimensional structure of an embodiment provided by the present invention;

[0028] Figure 3 This is a schematic diagram of the internal support component structure according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal three-dimensional structure of an embodiment provided by the present invention.

[0030] In the picture:

[0031] 100. Miniaturized laser range-gated imaging system;

[0032] 1. Outer shell assembly; 2. Inner support assembly; 3. Laser emitting module; 4. Laser receiving module; 5. Imaging control module; 6. Image processing module; 7. Power supply module.

[0033] 11. Front panel; 12. Cylindrical housing; 13. Rear panel; 21. Adapter bracket; 22. Base plate; 23. Second layer plate; 24. Adapter plate; 221. First optical plane; 222. Weight reduction groove; 223. Curved surface; 231. Second optical plane; 241. First adapter plate; 242. Second adapter plate; 243. Third adapter plate; 244. Fourth adapter plate. Detailed Implementation

[0034] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0035] To solve the above technical problems, the present invention provides a miniaturized integrated laser range gating imaging system, the miniaturized integrated laser range gating imaging system comprising: an outer shell assembly 1, an inner support assembly 2, a laser emitting module 3, a laser receiving module 4, an imaging control module 5, an image processing module 6, and a power supply module 7;

[0036] The outer shell assembly 1 is a sealed cylindrical cavity structure that integrates all other structural components and optoelectronic modules inside the cavity; one end of the outer shell assembly 1 serves as a light transmission window for the laser emitting module 3 and the laser receiving module 4, and the other end is connected to the inner support assembly 2 through the adapter bracket 21.

[0037] The inner support assembly 2 divides the cavity into upper and lower layers for installing the laser emitting module 3 and the laser receiving module 4, and connects the imaging control module 5, the image processing module 6 and the power supply module 7 through multiple adapter plates 24, integrating the optoelectronic modules required by the system onto the inner support assembly 2.

[0038] The outer shell assembly 1 includes a front panel 11, a cylindrical shell 12, and a rear panel 13;

[0039] The front panel 11 and the rear panel 13 are provided with countersunk holes evenly distributed in the circumference, which are threaded to the end face of the cylindrical shell 12 to form a closed cylindrical cavity.

[0040] The front panel 11 has two circular openings, which serve as light transmission windows for the laser emitting module 3 and the laser receiving module 4.

[0041] The rear panel 13 is connected to the adapter bracket 21 in the inner support assembly 2, and is connected to the base plate 22 and the second layer plate 23; since the imaging system is used for underwater testing, all connections of the outer shell assembly 1 are water-sealed by double-layer sealing strips.

[0042] Among them, such as Figure 3 As shown, the inner support assembly 2 is a frame structure composed of multiple panels, including a transition bracket 21, a base plate 22, a second-layer plate 23, and multiple transition plates 24. The transition bracket 21 connects the base plate 22 and the second-layer plate 23 to the outer shell assembly 1 by thread. The base plate 22 and the second-layer plate 23 cut the internal space of the cavity along the axial direction, and the transition plates 24 cut the internal space of the cavity perpendicular to the axial direction. The inner support assembly 2 divides the cavity into multiple non-interfering spaces for installing multiple optoelectronic modules of the system.

[0043] The base plate 22 is threadedly connected to the adapter bracket 21. The side of the base plate facing the inner side of the cavity is a first optical plane 221, which is used to install the laser emitting module 3 and is provided with multiple elliptical weight-reducing grooves. The side of the base plate 22 facing the outer side of the cavity is an arc-shaped curved surface 223, which is attached to the inner wall of the cylindrical shell 12 to conduct the heat generated by the laser emitting module 3 to the outer side of the cavity, while improving the coaxiality and connection strength between the base plate 22 and the outer shell assembly 1. The base plate 22 is provided with multiple elliptical weight-reducing grooves 222 to reduce the structural weight and improve the heat dissipation efficiency by increasing the heat dissipation surface.

[0044] The second-layer plate 23 is threaded to the adapter bracket 21 along the axial direction on one side and to the base plate 22 with studs on the other side, which increases the structural strength and ensures the parallelism between the second-layer plate 23 and the base plate. The side of the second-layer plate facing the inner side of the cavity is the second optical plane 231, which is used to install the laser receiving module 4. The side wall of the second-layer plate is threaded to multiple adapter plates 24, which are used to install the imaging control module 5, the image processing module 6 and the power supply module 7.

[0045] The second-layer plate 23 and the adapter plate 24 are mostly hollow frame structures, which reduce the structural weight while facilitating the circuit connection and data transmission between multiple optoelectronic modules.

[0046] The laser emitting module 3 includes a laser source and an emitting optical system. The laser source provides nanosecond-level, high peak power (to improve penetration in water) pulsed laser, and the emitting optical system increases the irradiation range.

[0047] The laser receiving module 4 includes an ultra-fast shutter gain detector (ICCD) and a receiving optical system. The detector has a nanosecond-level ultra-fast shutter to synchronize with the laser pulse for time detection. The receiving optical system is responsible for receiving the reflected light and can adjust the parameters of focal length, focus, and aperture according to the detection distance requirements.

[0048] The imaging control module 5 is responsible for high-precision time synchronization of the laser pulse signal of the laser emitting system and the detector shutter of the laser receiving system. Through internal high-precision timing, it controls the detector to select after a specific delay to complete the imaging process. The imaging control module is also responsible for the conversion of imaging modes and the timing encoding of different imaging modes.

[0049] The image processing module 6 is responsible for image reception, image processing, image transmission, video encoding / decoding, and video storage; the image processing module has an embedded GPU chip and has image processing and target recognition algorithm functions.

[0050] The power supply module 7 provides power to all other internal modules.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A miniaturized integrated laser range-gated imaging system, characterized in that, The miniaturized integrated laser range-gated imaging system includes: an outer shell assembly (1), an inner support assembly (2), a laser emitting module (3), a laser receiving module (4), an imaging control module (5), an image processing module (6), and a power supply module (7); The outer shell assembly (1) is a sealed cylindrical cavity structure that integrates all other structural components and optoelectronic modules inside the cavity; one end of the outer shell assembly (1) serves as the light transmission window for the laser emitting module (3) and the laser receiving module (4), and the other end is connected to the inner support assembly (2) through the adapter bracket (21); The inner support assembly (2) divides the cavity into upper and lower layers for installing the laser emitting module (3) and the laser receiving module (4), and connects the imaging control module (5), the image processing module (6) and the power supply module (7) through multiple adapter plates (24), integrating the optoelectronic modules required by the system onto the inner support assembly (2).

2. The miniaturized integrated laser range-gated imaging system as described in claim 1, characterized in that, The outer casing assembly (1) includes a front panel (11), a cylindrical casing (12), and a rear panel (13); The front panel (11) and rear panel (13) are provided with countersunk holes evenly distributed in the circumference, which are threaded to the end face of the cylindrical shell (12) to form a closed cylindrical cavity. The front panel (11) has two circular openings, which serve as light transmission windows for the laser emitting module (3) and the laser receiving module (4); The rear panel (13) is connected to the adapter bracket (21) in the inner support assembly (2), and is connected to the base plate (22) and the second layer plate (23); since the imaging system is used for underwater testing, all connections of the outer shell assembly (1) are water-sealed by double-layer sealing strips.

3. The miniaturized integrated laser range-gated imaging system as described in claim 2, characterized in that, The inner support assembly (2) is a frame structure composed of multiple panels, including a transfer bracket (21), a base plate (22), a second-layer plate (23), and multiple transfer plates (24). The transfer bracket (21) connects the base plate (22) and the second-layer plate (23) to the outer shell assembly (1) by thread. The base plate (22) and the second-layer plate (23) cut the internal space of the cavity along the axial direction. The transfer plates (24) cut the internal space of the cavity perpendicular to the axial direction. The inner support assembly (2) divides the cavity into multiple non-interfering spaces for installing multiple optoelectronic modules of the system.

4. The miniaturized integrated laser range-gated imaging system as described in claim 3, characterized in that, The base plate (22) is threadedly connected to the adapter bracket (21). The side facing the inner side of the cavity is the first optical plane (221), which is used to install the laser emitting module (3) and is provided with multiple elliptical weight reduction grooves. The side of the base plate (22) facing the outer side of the cavity is an arc-shaped curved surface (223), which is attached to the inner wall of the cylindrical shell (12) to conduct the heat generated by the laser emitting module (3) to the outer side of the cavity, while improving the coaxiality and connection strength between the base plate (22) and the outer shell assembly (1). Multiple elliptical weight reduction grooves (222) are provided on the base plate (22) to reduce the structural weight and improve the heat dissipation efficiency by increasing the heat dissipation surface.

5. The miniaturized integrated laser range-gated imaging system as described in claim 4, characterized in that, The second-layer plate (23) is threaded to the adapter bracket (21) along the axial direction on one side and to the stud of the base plate (22) on the other side, which increases the structural strength and ensures the parallelism between the second-layer plate (23) and the base plate; the side of the second-layer plate facing the inner side of the cavity is the second optical plane (231), which is used to install the laser receiving module (4); the side wall of the second-layer plate is threaded to multiple adapter plates (24), which are used to install the imaging control module (5), the image processing module (6) and the power supply module (7).

6. The miniaturized integrated laser range-gated imaging system as described in claim 5, characterized in that, The second-layer plate (23) and the adapter plate (24) are mostly hollow frame structures, which reduce the structural weight while facilitating the connection of circuits and data transmission between multiple optoelectronic modules.

7. The miniaturized integrated laser range-gated imaging system as described in claim 1, characterized in that, The laser emitting module (3) includes a laser source and an emitting optical system. The laser source provides nanosecond-level, high peak power pulsed laser, and the irradiation range is increased through the emitting optical system.

8. The miniaturized integrated laser range-gated imaging system as described in claim 1, characterized in that, The laser receiving module (4) includes an ultra-fast shutter gain detector and a receiving optical system. The detector has a nanosecond-level ultra-fast shutter and performs time-synchronized detection with the laser pulse. The receiving optical system is responsible for receiving the reflected light and can adjust the parameters of focal length, focus, and aperture according to the detection distance requirements.

9. The miniaturized integrated laser range-gated imaging system as described in claim 1, characterized in that, The imaging control module (5) is responsible for high-precision time synchronization of the laser pulse signal of the laser emitting system and the detector shutter of the laser receiving system. Through internal high-precision timing, it controls the detector to be selected after a specific delay to complete the imaging process. The imaging control module is also responsible for the conversion of imaging modes and the timing encoding of different imaging modes.

10. The miniaturized integrated laser range-gated imaging system as described in claim 3, characterized in that, The image processing module (6) is responsible for image reception, image processing, image transmission, video encoding and decoding, and video storage; the image processing module has an embedded GPU chip and has image processing and target recognition algorithm functions; The power supply module (7) provides power to all other internal modules.

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