CN-121978706-A - Miniaturized integrated laser distance gating imaging system

CN121978706ACN 121978706 ACN121978706 ACN 121978706ACN-121978706-A

Abstract

The invention belongs to the technical field of laser distance gating imaging systems, and particularly relates to a miniaturized integrated laser distance gating imaging system which comprises an outer shell component, an inner supporting component, a laser emitting module, a laser receiving module, an imaging control module, an image processing module and a power supply module, wherein the imaging module is used for acquiring a target transient image in an underwater test. The invention is characterized in that the outer shell component provides shell protection for the system, the inner support component is connected with the end face of the outer shell component and is circumferentially attached to the end face of the outer shell component, the heat dissipation efficiency is improved while the structural strength is ensured, the inner part of the cavity is divided into a plurality of mutually non-interfering spaces for installing a plurality of photoelectric modules in the cavity, the inner space of the cavity is utilized to the maximum extent, and the photoelectric modules are all installed on the inner support component, so that the system is convenient to debug and install before integration, and the invention is suitable for the integrated design of various imaging systems.

Inventors

CUI QINGQING
LIU MINGFENG
LIU QIANGHUI
LIANG XUQIANG
WANG DANNI
ZHENG JIAHUAN
DU BAICHENG
HU PENGYU
TIAN SHUAI

Assignees

西安现代控制技术研究所

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. The miniaturized integrated laser distance gating imaging system is characterized by comprising an outer shell component (1), an inner supporting component (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 of a sealed cylindrical cavity structure, and other all structural assemblies and photoelectric modules are integrated in the cavity, wherein one end of the outer shell assembly (1) is used as a light transmission window of the laser emitting module (3) and the laser receiving module (4), and the other end of the outer shell assembly is connected with the inner support assembly (2) through the switching support (21); The inner support assembly (2) divides the cavity into an upper layer and a lower layer, is used for installing the laser emitting module (3) and the laser receiving module (4), is connected with the imaging control module (5), the image processing module (6) and the power supply module (7) through a plurality of adapter plates (24), and integrates the photoelectric module required by the system on the inner support assembly (2).
2. A miniaturized integrated laser range-gated imaging system according to claim 1, characterized in that the outer housing assembly (1) comprises a front panel (11), a cylindrical housing (12) and a rear panel (13); Countersunk holes which are uniformly distributed in the circumferential direction are formed in the front panel (11) and the rear panel (13) and are in threaded connection with the end face of the cylindrical shell (12) to form a closed cylindrical cavity; The front panel (11) is provided with two circular openings which are used as light transmission windows of the laser emitting module (3) and the laser receiving module (4); The rear panel (13) is connected with the switching support (21) in the inner support assembly (2) and is connected with the bottom plate (22) and the two-layer plate (23), and as the imaging system is used for underwater test, all the joints of the outer shell assembly (1) are sealed by double-layer sealing strips.
3. The miniaturized integrated laser range gate imaging system according to claim 2, wherein the inner support assembly (2) is a frame structure formed by a plurality of panels, and comprises a transfer support (21), a bottom plate (22), a two-layer plate (23) and a plurality of transfer plates (24), wherein the transfer support (21) is used for connecting the bottom plate (22) and the two-layer plate (23) with the outer shell assembly (1) in a threaded manner, the bottom plate (22) and the two-layer plate (23) axially cut the inner space of the cavity, the transfer plates (24) are perpendicular to the axial direction, and the inner support assembly (2) is used for dividing the inner space of the cavity into a plurality of mutually non-interfering spaces for installing a plurality of photoelectric modules of the system.
4. A miniaturized integrated laser range gate imaging system as claimed in claim 3, characterized in that the base plate (22) is in threaded connection with the adapting support (21), one surface of the base plate facing the inner side of the cavity is a first optical plane (221) for installing the laser emission module (3), a plurality of elliptical weight reduction grooves are formed, one surface of the base plate (22) facing the outer side of the cavity is an arc-shaped curved surface (223), the base plate is attached to the inner wall of the cylindrical shell (12), heat generated by the laser emission module (3) is conducted to the outer side of the cavity, the coaxiality and the connection strength of the base plate (22) and the outer shell component (1) are improved, and a plurality of elliptical weight reduction grooves (222) are formed in the base plate (22), so that the structural weight is reduced, and the heat dissipation efficiency is improved by increasing the heat dissipation surface.
5. The miniaturized integrated laser range-gated imaging system as claimed in claim 4, characterized in that the two-layer plate (23) is connected with the adapter support (21) in a threaded manner along the axial direction and is connected with the bottom plate (22) in a stud manner, so that the structural strength is increased and the parallelism between the two-layer plate (23) and the bottom plate is ensured, the surface of the two-layer plate facing the inner side of the cavity is provided with a second optical plane (231) for mounting the laser receiving module (4), and the side walls of the two-layer plate are connected with the adapter plates (24) in a threaded manner for mounting 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 of claim 5 wherein the two-layer plate (23) and the interposer (24) are hollow frame structures to facilitate circuit connection and data transmission between the plurality of optoelectronic modules while reducing the weight of the structure.
7. A miniaturized integrated laser range-gated imaging system according to claim 1, characterized in that the laser emitting module (3) comprises a laser source providing nanosecond, high peak power pulsed laser light and an emission optical system by means of which the irradiation range is increased.
8. The miniaturized integrated laser range-gated imaging system of claim 1, wherein the laser receiving module (4) comprises an ultra-shutter gain type detector and a receiving optical system, the detector is provided with an ultra-shutter of nanosecond level and is used for detecting in time synchronization with laser pulses, and the receiving optical system is responsible for receiving reflected light and can adjust parameters of focal length, focusing and aperture according to the requirements of detection range.
9. The miniaturized integrated laser range-gated imaging system of claim 1 wherein the imaging control module (5) is responsible for high precision time synchronization of the laser pulse signal of the laser transmitter system and the detector shutter of the laser receiver system, and by internal high precision timing, the detector gating is controlled after a specific delay to complete the imaging process, and the imaging control module is responsible for both the conversion of imaging modes and the time sequential encoding of different imaging modes.
10. The miniaturized integrated laser range-gated imaging system of claim 3 wherein the image processing module (6) is responsible for image reception, image processing, image transmission, video encoding and decoding, and video storage; the power supply module (7) provides power for all other modules in the interior.

Description

Miniaturized integrated laser distance gating imaging system Technical Field The invention belongs to the technical field of laser distance gating imaging systems, and particularly relates to a miniaturized integrated laser distance gating imaging system. Background In an underwater test, because the underwater environment is dark and laser light supplementing is needed to be carried out on a target, the laser distance gating imaging technology is used for shielding back scattering light in a laser imaging path by controlling the instantaneous closing and opening of a shutter of an imaging detector, and capturing a transient image of the target. The laser range gating imaging system comprises a plurality of modules, such as a laser emitting module, a laser receiving module, an imaging control module, an image processing module, a power supply module and the like, and because all the modules of the system are required to be wrapped in a sealed cabin when the system is used underwater, the sealed cabin is required to have certain pressure resistance, and meanwhile, the whole weight of the system is required to be approximately equivalent to buoyancy in consideration of the buoyancy characteristic of a water body, so that the volume of an internal module is required to be compressed as much as possible, and the volume and the drainage of the sealed cabin are reduced. At present, an integrated design technology of a miniaturized laser range gate imaging system is lacking, so that optoelectronics is highly integrated in a closed space, structural strength, internal heat dissipation, optical path control and wiring design are comprehensively considered, and the requirements of an underwater severe test environment are met. Disclosure of Invention First, the technical problem to be solved The technical problem to be solved by the invention is how to provide a miniaturized integrated laser distance gating imaging system, so that an optical-mechanical-electrical module in the system is highly integrated in a closed space, structural strength, internal heat dissipation, optical path control and wiring design are comprehensively considered, and the requirement of acquiring a target transient image in an underwater test is met. (II) technical scheme In order to solve the technical problems, the invention provides a miniaturized integrated laser distance gating imaging system, which comprises an outer shell component (1), an inner supporting component (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 of a sealed cylindrical cavity structure, and other all structural assemblies and photoelectric modules are integrated in the cavity, wherein one end of the outer shell assembly (1) is used as a light transmission window of the laser emitting module (3) and the laser receiving module (4), and the other end of the outer shell assembly is connected with the inner support assembly (2) through the switching support (21); The inner support assembly (2) divides the cavity into an upper layer and a lower layer, is used for installing the laser emitting module (3) and the laser receiving module (4), is connected with the imaging control module (5), the image processing module (6) and the power supply module (7) through a plurality of adapter plates (24), and integrates the photoelectric module required by the system on the inner support assembly (2). Wherein the outer housing assembly (1) comprises a front panel (11), a cylindrical housing (12) and a rear panel (13); Countersunk holes which are uniformly distributed in the circumferential direction are formed in the front panel (11) and the rear panel (13) and are in threaded connection with the end face of the cylindrical shell (12) to form a closed cylindrical cavity; The front panel (11) is provided with two circular openings which are used as light transmission windows of the laser emitting module (3) and the laser receiving module (4); The rear panel (13) is connected with the switching support (21) in the inner support assembly (2) and is connected with the bottom plate (22) and the two-layer plate (23), and as the imaging system is used for underwater test, all the joints of the outer shell assembly (1) are sealed by double-layer sealing strips. As shown in fig. 3, the inner support assembly (2) is a frame structure formed by a plurality of panels, and comprises a switching support (21), a bottom plate (22), a two-layer plate (23) and a plurality of switching plates (24), wherein the switching support (21) is used for connecting the bottom plate (22) and the two-layer plate (23) with the outer shell assembly (1) in a threaded manner, the bottom plate (22) and the two-layer plate (23) are used for axially cutting the inner space of the cavity, the switching plates (24) are perpendicular to the inner space of the cavity, and the inner suppo