CN113411479A - Camera device for vacuum, low-temperature and strong electromagnetic field environment - Google Patents

Camera device for vacuum, low-temperature and strong electromagnetic field environment Download PDF

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Publication number
CN113411479A
CN113411479A CN202110671869.9A CN202110671869A CN113411479A CN 113411479 A CN113411479 A CN 113411479A CN 202110671869 A CN202110671869 A CN 202110671869A CN 113411479 A CN113411479 A CN 113411479A
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CN
China
Prior art keywords
camera
box body
vacuum
temperature
strong electromagnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110671869.9A
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Chinese (zh)
Inventor
毕研强
李西园
杨晓宁
杨勇
洪辰伟
赵越阳
于晨
李文淼
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Beijing Institute of Spacecraft Environment Engineering
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Beijing Institute of Spacecraft Environment Engineering
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Publication date
Application filed by Beijing Institute of Spacecraft Environment Engineering filed Critical Beijing Institute of Spacecraft Environment Engineering
Priority to CN202110671869.9A priority Critical patent/CN113411479A/en
Publication of CN113411479A publication Critical patent/CN113411479A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50Constructional details
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • G03B17/55Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50Constructional details
    • H04N23/51Housings
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/56Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60Control of cameras or camera modules
    • H04N23/695Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • H04N23/74Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Accessories Of Cameras (AREA)
  • Studio Devices (AREA)

Abstract

The application provides a camera device for a vacuum, low-temperature and strong electromagnetic field environment, which comprises a box body and a camera assembly; the box body is of a closed structure, and microwave absorbing materials are arranged inside the box body; the camera shooting assembly is positioned in the box body and comprises a rotatable camera and a reflector set which are arranged in the box body; the box body is provided with an observation window corresponding to the camera shooting assembly; the observation window is provided with glass for electromagnetic shielding. According to the technical scheme provided by the embodiment of the application, a vacuum environment outside the camera shooting assembly is shielded by a closed box body, and a strong electromagnetic environment outside the camera shooting assembly is shielded by matching with a microwave absorbing material, so that the camera shooting assembly is in an environment with normal temperature, normal pressure and weak field intensity; furthermore, the camera is indirectly shot through the reflector group, the camera can be arranged at a deeper position of the box body, microwaves are prevented from entering the camera through the optical channel coupling, and meanwhile, the reflector group is more convenient to finely adjust the shooting angle.

Description

Camera device for vacuum, low-temperature and strong electromagnetic field environment
Technical Field
The application relates to the technical field of special tests, in particular to a camera device for vacuum, low-temperature and strong electromagnetic field environments.
Background
The surface of the spacecraft is generally paved with a large number of multilayer heat insulation assemblies (MLI), the multilayer heat insulation assemblies generally consist of a plurality of layers of aluminizers and spacing layers (generally 5-20 layers), wherein the base material of the aluminizer at the inner part is generally a polyester film, the spacing layer is generally a polyester wire, a flame-retardant wire and the like, the base material of the outer film is generally a polyimide material, and meanwhile, in order to enhance the surface adaptability of the spacecraft, the multilayer heat insulation assemblies adopting the processes of surface carburization, ITO plating and the like are also provided. Under the coupling action of vacuum and strong electromagnetic fields, secondary electron multiplication effect, low-pressure discharge and other phenomena may occur on the surface of the multilayer heat insulation assembly, so that the surface and even the interior of the multilayer heat insulation assembly are damaged, adverse effects on the thermal control performance and the shielding efficiency of the spacecraft may be caused, and even further damage to internal materials is caused under the action of the strong field. The damage mechanism is very complex, and the coupling effect of micro discharge and low-pressure discharge often exists. In addition, similar damage phenomena may occur with other overlay materials on the surface of the spacecraft. Therefore, in order to evaluate the damage mechanism of the spacecraft surface material under the coupling action of vacuum, low temperature and strong field, a test is generally carried out in a ground simulation environment, and the damage of a test piece is observed and recorded in a video mode.
However, under vacuum, the camera often has problems of insufficient heat dissipation, volatilization of grease, discharge and the like; the low temperature often causes the problems of exceeding the use temperature range, freezing damage of materials, lubrication failure and the like; strong fields up to hundreds to thousands of V/m cause interference, degradation and even damage to electronic devices, and this problem is urgently needed to be solved.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide an imaging device for use in a vacuum, low temperature, and strong electromagnetic field environment.
The application provides a camera device for a vacuum, low-temperature and strong electromagnetic field environment, which comprises a box body and a camera assembly; the box body is of a closed structure, and microwave absorbing materials are arranged inside the box body; the camera shooting assembly is positioned in the box body and comprises a camera and a reflector group which are rotatably arranged in the box body; the box body is provided with an observation window corresponding to the camera shooting assembly; the observation window is provided with glass for electromagnetic shielding.
Further, a light supplementing assembly is also arranged in the box body; the light supplementing assembly comprises an LED lamp group and a light guide pipe; the light guide pipe is connected with the LED lamp bank and used for supplementing light to the illuminated object.
Further, a control system is also arranged in the box body; the box body is provided with an airtight electric connector and an airtight optical fiber connector corresponding to the control system.
Further, the control system comprises a power supply module, a controller and a switch; the power supply module is connected with the airtight electric connector and used for supplying power to the system; the switch is connected to a hermetically sealed fiber optic connector for providing connection of the controller and the camera to the ethernet network.
Further, the device also comprises a heating module; the heating module is electrically connected with the controller and is used for regulating and controlling the temperature of the device; the heating module comprises a temperature sensor, a heater and a field effect tube; the field effect transistor is electrically connected with the heater and is in signal connection with the temperature sensor through the controller.
Further, the camera and the reflector group are respectively arranged on the electric pan-tilt; the electric cradle head is electrically connected with the cradle head driving module; the holder driving module is in signal connection with the controller.
Further, the device also comprises a relay module; the relay module is electrically connected between the power supply module and the camera and between the holder driving module and the camera and used for controlling the on-off of the power supply.
Further, the reflector group comprises a first reflector and a second reflector; the first reflector is positioned at the camera; the second reflector is located at the viewing window.
The application has the advantages and positive effects that:
according to the technical scheme, a vacuum environment outside the camera shooting assembly is shielded by a closed box body, and a strong electromagnetic environment outside the camera shooting assembly is shielded by matching with a microwave absorbing material, so that the camera shooting assembly is in an environment with normal temperature, normal pressure and weak field intensity; furthermore, the camera can be arranged at a deeper position of the box body by indirectly shooting through the reflector group, microwaves can be prevented from entering the camera through the optical channel coupling, and meanwhile, the reflector group can more conveniently finely adjust the shooting angle.
Drawings
Fig. 1 is a schematic structural diagram of an image pickup apparatus for use in a vacuum, low-temperature, and strong electromagnetic field environment according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an appearance of an image pickup apparatus for use in a vacuum, low-temperature, and strong electromagnetic field environment according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a control system of an imaging apparatus for use in a vacuum, low-temperature, and strong electromagnetic field environment according to an embodiment of the present application.
The text labels in the figures are represented as: 100-a box body; 101-a flange; 102-a bolt; 110-glass; 120-LED lamp group; 121-a light guide; 130-a gas tight electrical connector; 140-hermetic fiber optic connectors; 200-a camera; 201-limit switch; 210-an electric pan-tilt; 220-a first mirror; 230-a second mirror; 300-a control system; 310-a power supply module; 320-a controller; 330-a switch; 340-a temperature sensor; 341-a heater; 342-field effect transistor; 350-a holder driving module; 360-relay module.
Detailed Description
The following detailed description of the present application is given for the purpose of enabling those skilled in the art to better understand the technical solutions of the present application, and the description in this section is only exemplary and explanatory, and should not be taken as limiting the scope of the present application in any way.
Referring to fig. 1-3, the present embodiment provides an image capturing apparatus for use in a vacuum, low temperature, and strong electromagnetic field environment, including a housing 100; the box body 100 is of a closed structure, microwave absorbing materials are pasted inside the box body and are used for providing an environment with normal temperature, normal pressure and weak field intensity for the camera assembly installed inside; still correspond the camera subassembly on the box 100 and be equipped with the observation window, install the glass 110 that is used for electromagnetic shield on the observation window, both ensured that camera unit can normally shoot to the outside, can effectively shield the electromagnetism again, ensured the inside weak field intensity environment of box 100.
In a preferred embodiment, the box 100 is made of metal, and has a surface with a stiffener for bearing a pressure difference of 1.0 atm or more; the observation window is positioned at one side of the box body 100; the glass 110 is mounted through the flange 101; the flange 101 is fixedly mounted on the box 100 through bolts 102; glass 110 is located between flange 101 and tank 100.
Preferably, the box body 100 is provided with corresponding blind holes corresponding to the bolts 102, and by arranging the blind holes to be abutted to the bolts 102, normal installation of the flange 101 can be ensured, continuity of an electromagnetic shielding interface can be ensured, possibility of electromagnetic waves coupling into the box body 100 through the bolts 102 is reduced, and a pressure sealing boundary is provided.
In a preferred embodiment, the camera assembly includes a camera 200; the video camera 200 is a surveillance camera having remote controllable zooming, focusing and detailed setting functions, and can transmit video streams to a collection device outside the container through the ethernet.
In a preferred embodiment, the cabinet 100 further has a reflector set therein; the reflector group is used for optically connecting the camera 200 with the observation window; the camera 200 shoots the outside through the reflecting mirror group, which not only facilitates the arrangement of the camera 200 in the box body 100, but also prevents the microwave from entering the inside of the camera 200 through the optical channel coupling.
Preferably, the mirror group comprises a first mirror 220 and a second mirror 230; first mirror 220 is located at the viewing window and second mirror 230 is located at camera 200; the camera 200 can effectively photograph the outside through the observation window by reflection between the mirror groups.
Preferably, the camera 200 and the mirror group are respectively mounted on the motorized pan and tilt head 210, and the angles of the camera 200 and the first and second mirrors 220 and 230 can be adjusted by rotating the motorized pan and tilt head 210, so as to control the shooting angle.
Preferably, limit switches 201 are further respectively arranged on two sides of the camera 200 in the box body 100; the limit switch is used for limiting the rotation angle of the camera 200 and is connected with the electric pan-tilt 210 for controlling the camera 200.
In a preferred embodiment, a light supplement assembly is further disposed in the box body 100; the light supplementing assembly comprises an LED lamp group 120 and a light guide pipe 121; LED banks 120 fixed mounting is in the inside of box 100, and light pipe 121 one end is connected with LED banks 120, and one end is located observation window department for derive light to the box 100 outside, can carry out the light filling to the mirror of being shot and shoot, can reduce the possibility of banks 120 electromagnetic wave coupling again.
In a preferred embodiment, a control system 300 is further disposed in the box 100; the control system 300 includes a power module 310, a controller 320, and a switch 330; the power module 310 is used for supplying power to the system and is connected with the outside for charging through the airtight electric connector 130 on the box 100; the box 100 is also provided with an airtight fiber connector 140 corresponding to the switch 330, and all video and control signals are transmitted through optical fibers during testing, so as to prevent interference of a strong electromagnetic field environment.
In a preferred embodiment, the control system 300 further includes a heating module; the heating module is connected to a controller 130 for controlling the temperature inside the case 100.
Preferably, the heating module includes a temperature sensor 340, a heater 341, and a field effect tube 342; the fet 342 is electrically connected to the heater 341 and is in signal connection with the temperature sensor 340 via the controller 320.
In a preferred embodiment, control system 300 further includes a pan-tilt drive module 350; the cradle head driving module 350 is in signal connection with the controller 320, and is used for controlling the rotation of the electric cradle head 210.
Preferably, a relay module 360 is further arranged between the holder driving module 350, the camera 200, the LED lamp set 120 and the power module 310; the relay module 360 is in signal connection with the controller 320 and is used for controlling the power supply on-off.
In a preferred embodiment, the external collection device comprises a video recording device, which is connected to the external switch via a signal, and is connected to the airtight fiber connector 140 via an external airtight fiber connector.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention in other contexts without modification may be viewed as within the scope of the present application.

Claims (8)

1. A camera device used in vacuum, low temperature and strong electromagnetic field environment is characterized in that the camera device comprises a box body (100) and a camera component; the box body (100) is of a closed structure, and microwave absorbing materials are arranged inside the box body; the camera shooting assembly is positioned in the box body (100) and comprises a camera (200) and a reflector group which are rotatably arranged in the box body (100); an observation window is arranged on the box body (100) corresponding to the camera shooting assembly; the observation window is provided with glass (110) for electromagnetic shielding.
2. The camera device for the vacuum, low-temperature and strong electromagnetic field environment according to claim 1, wherein a light supplement component is further arranged in the box body (100); the light supplementing assembly comprises an LED lamp set (120) and a light guide pipe (121); the light guide pipe (121) is connected with the LED lamp group (120) and used for supplementing light to an illuminated object.
3. The camera device for vacuum, low-temperature and strong electromagnetic field environment according to claim 1, characterized in that a control system (300) is further provided in the box body (100); the box body (100) is provided with an airtight electric connector (130) and an airtight optical fiber connector (140) corresponding to the control system (300).
4. The camera device for vacuum, low temperature, strong electromagnetic field environment according to claim 3, characterized in that the control system (300) comprises a power module (310), a controller (320) and a switch (330); the power supply module (310) is connected with the airtight electric connector (130) and used for supplying power to the system; the switch (330) is connected to a hermetically sealed fiber optic connector (140) for providing the controller (320) and camera (200) with an ethernet connection.
5. The imaging device for a vacuum, low-temperature, strong electromagnetic field environment according to claim 4, further comprising a heating module; the heating module is electrically connected with the controller and is used for regulating and controlling the temperature of the device; the heating module comprises a temperature sensor (340), a heater (341) and a field effect tube (342); the field effect transistor (342) is electrically connected with the heater (341) and is in signal connection with the temperature sensor (340) through the controller (320).
6. The camera device for vacuum, low-temperature and strong electromagnetic field environment according to claim 4, wherein the camera (200) and the mirror group are respectively installed on an electric pan-tilt (210); the electric cradle head (210) is electrically connected with the cradle head driving module (350); the holder driving module (350) is in signal connection with the controller (320).
7. The camera device for vacuum, low temperature, strong electromagnetic field environment according to claim 6, further comprising a relay module (360); the relay module (360) is electrically connected between the power supply module (310) and the holder driving module (350) and the camera (200) and is used for controlling the on-off of the power supply.
8. The camera device for vacuum, low temperature, strong electromagnetic field environment according to claim 1, wherein said mirror group comprises a first mirror (220) and a second mirror (230); the first mirror (220) is located at the camera (200); the second mirror (220) is located at the viewing window.
CN202110671869.9A 2021-06-17 2021-06-17 Camera device for vacuum, low-temperature and strong electromagnetic field environment Pending CN113411479A (en)

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Application Number Priority Date Filing Date Title
CN202110671869.9A CN113411479A (en) 2021-06-17 2021-06-17 Camera device for vacuum, low-temperature and strong electromagnetic field environment

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Application Number Priority Date Filing Date Title
CN202110671869.9A CN113411479A (en) 2021-06-17 2021-06-17 Camera device for vacuum, low-temperature and strong electromagnetic field environment

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114095638A (en) * 2021-12-08 2022-02-25 杭州海康威视数字技术股份有限公司 Camera system
CN115857259A (en) * 2023-02-22 2023-03-28 中国空气动力研究与发展中心设备设计与测试技术研究所 Integrated camera lighting device for cryogenic environment
WO2023103376A1 (en) * 2021-12-08 2023-06-15 杭州海康威视数字技术股份有限公司 Camera
CN116698757A (en) * 2023-08-04 2023-09-05 北京天工科仪空间技术有限公司 Test device and test method for laser induced discharge of spacecraft material or component

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114095638A (en) * 2021-12-08 2022-02-25 杭州海康威视数字技术股份有限公司 Camera system
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CN115857259A (en) * 2023-02-22 2023-03-28 中国空气动力研究与发展中心设备设计与测试技术研究所 Integrated camera lighting device for cryogenic environment
CN116698757A (en) * 2023-08-04 2023-09-05 北京天工科仪空间技术有限公司 Test device and test method for laser induced discharge of spacecraft material or component
CN116698757B (en) * 2023-08-04 2023-10-31 北京天工科仪空间技术有限公司 Test device and test method for laser induced discharge of spacecraft material or component

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