CN111163251A - Variable-view-angle camera system used in vacuum and high-low temperature environment - Google Patents

Variable-view-angle camera system used in vacuum and high-low temperature environment Download PDF

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Publication number
CN111163251A
CN111163251A CN202010008812.6A CN202010008812A CN111163251A CN 111163251 A CN111163251 A CN 111163251A CN 202010008812 A CN202010008812 A CN 202010008812A CN 111163251 A CN111163251 A CN 111163251A
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China
Prior art keywords
cover body
transverse plate
inner cover
plate
camera system
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Granted
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CN202010008812.6A
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Chinese (zh)
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CN111163251B (en
Inventor
李西园
高庆华
纪欣言
李振伟
封宝华
廖达雄
盖文
罗强
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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 of CN111163251A publication Critical patent/CN111163251A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS 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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/55—Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

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

Abstract

The invention relates to a camera system with a variable visual angle for a vacuum and high-low temperature environment, which comprises an outer cover body, an inner cover body, a camera module and a mounting frame, wherein an upper flange cover plate and a lower flange plate are arranged on the inner cover body; the gas outlet is positioned in the area of the upper flange plate corresponding to the gap between the inner cover body and the outer cover body, so that gas between the inner cover body and the outer cover body can be discharged. The camera module is arranged in the closed space, and normal temperature gas or low temperature gas is introduced into the closed space to maintain the camera module within a normal working range.

Description

Variable-view-angle camera system used in vacuum and high-low temperature environment
Technical Field
The invention belongs to the technical field of ground tests of spacecrafts and aircrafts, and particularly relates to a visual angle variable camera system used in vacuum and high-low temperature environments.
Background
With the diversification of the models of the spacecraft in China, the models put forward the requirements of monitoring a test piece and a test system in vacuum and high-low temperature environment tests, particularly for large components such as a moving mechanism, the overall situation needs to be supplemented with light in the tests, the visual angle is switched according to the needs in the tests, and the details of the components are observed. High definition under the current vacuum, high-speed make a video recording generally use tubular structure, and the material is stainless steel or aluminium, and quartz glass is installed to the front end to through flange, sealing washer sealed, rear end installation wiring flange can lead out outside the container with inside signal of telecommunication, and it has following problem generally:
the visual angle is limited, because the front end uses a quartz glass disc, the visual angle is limited to the size of quartz glass, even if a holder is arranged in the container, the metal cylinder can also shield the sight, only the local adjustment of the visual angle can be realized, and the requirement of multi-angle monitoring is difficult to meet;
the tripod head customized by using the vacuum motor is arranged outside the sealing cylinder, the sealing cylinder and the camera rotate together, but the requirement on the torque of the tripod head is higher, the problem of overheating is easy to occur in vacuum, and the tripod head is difficult to be used in vacuum and high-temperature environments;
when the traditional dome camera is directly used, the following problems exist:
in general, the lubricating grease in movable components such as an internal lens and a motor slowly volatilizes under low pressure, so that the lubricating grease is desublimated on a low-temperature surface to form organic pollution, which affects cleanliness in a test and even causes equipment damage;
when an explosion-proof ball machine is used, the problem of difficult heat dissipation also exists.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a variable viewing angle imaging system for use in vacuum, high and low temperature environments to solve the above-mentioned problems of the background art.
In the first aspect, the invention provides a technical scheme that the camera system with a variable visual angle for use in vacuum and high and low temperature environments comprises an outer cover body, an inner cover body arranged in the outer cover body, a camera module, a mounting frame for arranging the camera module, an upper flange cover plate and a lower flange plate,
the mounting frame and the camera module are arranged on the inner cover body, the upper flange cover plate and the lower flange plate seal the opening parts of the outer cover body and the inner cover body,
the inner cover body is provided with a gap, the upper flange cover plate is provided with an air inlet and an air outlet, and the air inlet is positioned in the area of the upper flange cover plate corresponding to the opening part of the inner cover body, so that air can be guided into the inner cover body;
the gas outlet is positioned in the area of the upper flange plate corresponding to the gap between the inner cover body and the outer cover body, so that gas between the inner cover body and the outer cover body can be discharged.
Preferably, the outer cover body comprises a first skirt edge which is circular, a first cylinder body and a first spherical end enclosure,
one end of the first cylinder is provided with a first skirt edge, and the other end of the first cylinder is provided with a first spherical end socket;
the inner cover body comprises a second skirt edge which is annular, a second cylinder body and a second seal head,
one end of the second cylinder body is provided with a second skirt edge, the other end of the second cylinder body is provided with the second spherical sealing head, the second skirt edge is provided with a through hole, and the second spherical sealing head is provided with a gap.
Preferably, the inner cover body is made of organic glass, and the outer cover body is made of quartz glass.
Preferably, the mounting rack comprises a first transverse plate, a second transverse plate, a third transverse plate, a vertical rod and a radiating fin,
the first transverse plate, the second transverse plate and the third transverse plate are arranged at intervals from top to bottom in sequence,
the vertical rod passes through the first transverse plate, the second transverse plate and the third transverse plate, one end part of the vertical rod is the first transverse plate, the other end part of the vertical rod is the third transverse plate,
the radiating fins are located between the second transverse plate and the third transverse plate and are uniformly distributed at equal angles relative to the vertical rods.
Preferably, the device also comprises a control module, a sensor module and an air supply device,
the sensor module is arranged in the inner cover body and is used for measuring the temperature,
the control module is in communication connection with the sensor module, and the control module is electrically connected with the gas supply device.
Preferably, the control module comprises a switch, a power supply, a computer and an electrical connector,
when the test is carried out in a simulation container in a vacuum and low-temperature space environment, the computer, the power supply and the switch are arranged outside the simulation container,
the switch, the power supply, the computer and the camera module are electrically connected through the electric connector and the polytetrafluoroethylene high and low temperature resistant cable.
The camera module is arranged in the closed space, and normal temperature gas or low temperature gas is introduced into the closed space to maintain the camera module within a normal working range.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the configuration of the camera system of the present invention;
FIG. 2 is an enlarged partial schematic view of A of FIG. 1;
FIG. 3 is a first schematic view of the mount of the present invention;
FIG. 4 is a second schematic view of the mount of the present invention;
FIG. 5 is a control schematic of the camera system of the present invention in an experimental loop;
in FIGS. 1-5: 1. the device comprises an outer cover body 11, a first skirt edge 12, a first cylinder body 13, a first spherical end enclosure 2, an inner cover body 21, a second skirt edge 211, a through hole 22, a second cylinder body 23, a second spherical end enclosure 231 and a gap;
3. an upper flange cover plate 31, an air inlet 32, an air outlet 4 and a lower flange plate;
5. the heat dissipation device comprises a mounting frame 51, a first transverse plate 52, a second transverse plate 53, a third transverse plate 54, a vertical rod 55 and heat dissipation fins;
6. camera, 7, auxiliary light source.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be mechanically or electrically connected, directly or indirectly through an intermediate medium, or they may be connected through the inside of two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1 and 2, a variable-view-angle camera system for use in a vacuum, high-temperature and low-temperature environment includes an outer cover 1, an inner cover 2, an upper flange cover 3, a lower flange 4, a mounting bracket 5, and a camera module.
The mounting bracket 5 and the camera module are arranged on the inner cover body 2, and the upper flange cover plate 3 and the lower flange plate 4 close the opening parts of the outer cover body 1 and the inner cover body 2.
The upper flange cover plate 3 is provided with an air inlet 31 and an air outlet 32, the air inlet 31 is positioned in the area of the upper flange cover plate 3 corresponding to the opening part of the inner cover body 2, so that air can be guided into the inner cover body 2; the air outlet 32 is positioned in the area of the upper flange cover plate 3 corresponding to the gap between the inner cover body 2 and the outer cover body 1, so that the air between the inner cover body 2 and the outer cover body 1 can be exhausted out of the outer cover body 1; the inner cover 2 is provided with a gap 231 to allow the gas of the inner cover 2 to enter the gap between the inner cover 2 and the outer cover 1.
If the camera system is in a vacuum and low-temperature environment, normal-temperature gas is introduced into the inner cover body 2 from the air inlet 31 to exchange heat with the camera module, so that the camera module is maintained in a normal working temperature range. Then, the normal temperature gas enters the gap between the inner cover 2 and the outer cover 1 through the slit 231 of the inner cover 2, and finally, the normal temperature gas is discharged to the external environment through the gas outlet 32.
If this camera system is in under vacuum, the high temperature environment, low temperature gas is leading-in inner cover body 2 from air inlet 31, carries out the heat transfer with the module of making a video recording, maintains the module of making a video recording and is in normal operating temperature range. Then, the normal temperature gas enters the gap between the inner cover 2 and the outer cover 1 through the slit 231 of the inner cover 2, and finally, the normal temperature gas is discharged to the external environment through the gas outlet 32.
The camera module is arranged in the closed space, and the camera module is maintained within a normal working range through the convection heat exchange of the normal-temperature gas or the low-temperature gas.
Referring to fig. 1 and 2, in a preferred embodiment of the present embodiment, the outer cover 1 includes a first skirt 11, a first cylinder 12 and a first spherical head 13.
The first skirt 11 is a circular ring-shaped plate, one end of the first cylinder 12 is provided with the first skirt 11, and the other end of the first cylinder 12 is provided with a first spherical end enclosure 13.
The inner cover body 2 comprises a second skirt 21, a second cylinder 22 and a second spherical end socket 23.
The second skirt 21 is a circular ring-shaped plate, one end of the second cylinder 22 is provided with the second skirt 21, and the other end of the second cylinder 22 is provided with a second spherical end socket 23.
The second skirt 21 is provided with a through hole 211, the through hole 211 corresponds to the air outlet 32 of the upper flange cover plate 3, and the second sealing head 23 is provided with a gap 231.
The outer diameter of the second skirt edge 21 of the inner cover body 2 is equal to the inner diameter of the first cylinder 12 of the outer cover body 1, so that the second skirt edge 21 of the inner cover body 2 can be embedded into the first cylinder 12, and the inner cover body 2 is fixed in the outer cover body 1.
The first skirt edge 11 of the outer cover body 1 is positioned between the upper flange cover plate 3 and the lower flange plate 4, and holes with the same size are formed in the outer cover body 1, the upper flange cover plate 3 and the lower flange plate 4. The three parts are fastened by the bolts penetrating through the holes, so that the camera module is positioned in a closed space.
For further optimization scheme design, set up sealed the pad between upper flange apron 3 and lower flange board 4, further improve airtight space's sealing performance, avoid the influence of external environment's steam, dust to the module of making a video recording, prolong its working life.
The structure of the outer cover 1 and the inner cover 2 is beneficial to maintaining the camera module in a normal working range.
It should be noted that the air inlet 31 is connected to a pipe, and the pipe is connected to an air outlet pipe of the blower or the air storage tank. The fan leads the normal temperature gas outside the pressure container into the inner cover body 2, or the low temperature gas stored in the gas storage tank is led into the inner cover body 2 through the pipeline. The air outlet is connected with another pipeline and used for discharging the air in the outer cover body 1.
In a preferred embodiment of this embodiment, the material of the outer cover 1 is quartz glass, and the material of the inner cover 2 is organic glass.
Because the quartz glass is high-temperature resistant and has a very small thermal expansion coefficient, the quartz glass is only 1/12-1/20 of common glass; the chemical thermal stability is good, the bubbles, the stripes, the uniformity and the birefringence can be compared favorably with the common optical glass, the essential optical material with a high-stability optical system works in various severe occasions, the light transmission of the quartz glass is good, and the mechanical property is better than that of hard glass and ceramics. The wear resistance of the system can be effectively improved by installing the wear-resistant anti-abrasion system outside the system, and the system is prevented from generating scratches in the installation.
Organic glass is the most excellent high molecular transparent material at present, has the advantages of high strength, tensile resistance, strong shock resistance, good heat insulation effect and the like, but has lower surface hardness and easy abrasion, and can improve the heat insulation performance of a system when being used for the inner cover body 2.
Referring to fig. 3 and 4, in a preferred embodiment of the present invention, the mounting frame 5 for arranging the camera module comprises a first horizontal plate 51, a second horizontal plate 52, a third horizontal plate 53, a vertical rod 54 and a heat sink 55.
The first horizontal plate 51 is a circular plate, and the first horizontal plate 51 is disposed on the lower surface of the upper flange cover 3, so that the mounting bracket 5 is fixed to the upper flange cover 3.
The second transverse plate 52 and the third transverse plate 53 are regular polygonal plates, the radius of the circumscribed circle corresponding to the third transverse plate 53 is smaller than the inner diameter of the second cylinder 22 of the inner cover 2, and the radius of the circumscribed circle corresponding to the second transverse plate 52 is smaller than the radius of the circumscribed circle corresponding to the third transverse plate 53.
The first transverse plate 51, the second transverse plate 52 and the third transverse plate 53 are sequentially arranged from top to bottom at intervals, the vertical rod 54 penetrates through the first transverse plate 51, the second transverse plate 52 and the third transverse plate 53, one end portion of the vertical rod 54 is the first transverse plate 51, the other end portion of the vertical rod 54 is the third transverse plate 53, and therefore the first transverse plate 51, the second transverse plate 52 and the third transverse plate 53 are perpendicular to the vertical rod 54 respectively.
A plurality of heat dissipation fins 55 are fixed between the second horizontal plate 52 and the third horizontal plate 53, and the heat dissipation fins 55 are uniformly distributed at equal angles relative to the vertical rod 54, so that the included angles between any two adjacent heat dissipation fins 55 are equal.
The camera module comprises a camera 6 and an auxiliary light source 7, wherein the camera 6 is a spherical camera and is arranged on the lower surface of the third transverse plate 53. The auxiliary light source 7 is an LED supplementary light array. The light supplement lamp array is arranged between the two adjacent radiating fins 55, and heat conduction silicone grease is smeared on the radiating fins 55, so that heat generated by the LED light supplement array can be rapidly LED out.
The camera 6 and the auxiliary light source 7 are fixed, so that a part of light emitted by the LED light supplement array is blocked by the third transverse plate 53, and the influence on the normal monitoring of the spherical camera is avoided.
In a preferred implementation manner of this embodiment, the camera system further includes a sensor module, a control module, and a fan, where the sensor module is disposed in the inner cover body 2 and is used to measure the temperature in the cover; the control module is in communication connection with the sensor module and is electrically connected with the fan.
For example, if this camera system is in the vacuum, under the low temperature environment, the temperature in the inner cover body 2 is discerned too low to the sensor module, the sensor module sends low temperature signal to control module, control module control fan work, the gaseous leading-in inner cover body 2 of normal atmospheric temperature dehumidification from air inlet 31, with the module heat transfer of making a video recording, it is in normal operating temperature range to maintain the module of making a video recording, the gaseous gap 231 that gets into between inner cover body 2 and the outer cover body 1 from the opening of inner cover body 2 of normal atmospheric temperature, discharge the external environment from gas outlet 32 at last.
If the camera system is in a vacuum and high-temperature environment, low-temperature gas can be blown in through the fan, and the working process is the same as that of the camera system.
In a preferred embodiment of this embodiment, the control module includes a switch, a power source, a computer, and an electrical connector.
Referring to fig. 5, when the test is performed in the simulation container in the vacuum, low-temperature space environment, the computer, the power supply, and the exchanger are disposed outside the simulation container.
The electric connector 1 is arranged in the camera system; the electric connector 2 is a through-wall airtight electric connector and is arranged on an upper flange cover plate 3 of the invention; the electric connector 3 is arranged outside the camera system, and the electric connectors 1, 2 and 3 can lead out camera signals on the basis of ensuring the sealing of the camera system and provide the power supply function of the system.
In the application mode of vacuum and high and low temperature, the electric connector 4 is arranged on the inner wall surface of the simulation container; the electric connection 5 is a through-wall airtight electric connector; the electric connector 6 is mounted on the outer wall surface of the dummy container.
One end of the first cable is electrically connected with the auxiliary light source, and the other end of the first cable is welded to the electric connector 1;
one end of the second cable is electrically connected with the camera, and the other end of the second cable is welded to the electric connector 1;
one end of the third cable is soldered to the electrical connector 3 and the other end is soldered to the electrical connector 4; one end of the fourth cable is soldered to the electrical connector 3 and the other end is soldered to the electrical connector 4;
one end of the fifth cable is welded to the electric connector 6, and the other end of the fifth cable is connected with a power supply through a network cable; one end of the sixth cable is welded to the electric connector 6, and the other end of the sixth cable is connected with the switch through a network cable; the exchanger is connected with the computer through a network cable, so that the functions of camera shooting, monitoring, storage and the like are realized.
Wherein the electric connectors 1 and 6 are of type Y27A III-2237 TK1L, the electric connectors 2 and 5 are of type Y27A III-2237 ZJB4H, the electric connectors 3 and 4 are of type Y27A III-2237 TKLW,
wherein first cable, third cable, fifth cable are two-core cable, and second cable, fourth cable, sixth cable are 8-core cable, and third cable and fourth cable are the resistant high low temperature cable of polytetrafluoroethylene, greatly reduced system's complexity.
The above examples are only illustrative of the technical solutions of the present invention and not restrictive, and although the present invention is described in detail with reference to the examples, those of ordinary skill in the art should understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. A camera system with a variable visual angle for use in vacuum and high and low temperature environments is characterized by comprising an outer cover body, an inner cover body arranged in the outer cover body, a camera module, a mounting frame for arranging the camera module, an upper flange cover plate and a lower flange plate,
the mounting frame and the camera module are arranged on the inner cover body, the upper flange cover plate and the lower flange plate seal the opening parts of the outer cover body and the inner cover body,
the inner cover body is provided with a gap, the upper flange cover plate is provided with an air inlet and an air outlet, and the air inlet is positioned in the area of the upper flange cover plate corresponding to the opening part of the inner cover body, so that air can be guided into the inner cover body;
the gas outlet is positioned in the area of the upper flange plate corresponding to the gap between the inner cover body and the outer cover body, so that gas between the inner cover body and the outer cover body can be discharged.
2. The camera system according to claim 1, wherein the outer cover body comprises a first skirt, a first cylinder and a first spherical end socket, the first skirt is arranged at one end of the first cylinder, and the first spherical end socket is arranged at the other end of the first cylinder; the inner cover body comprises a second skirt edge, a second cylinder body and a second seal head, wherein the second skirt edge is annular, one end portion of the second cylinder body is provided with the second skirt edge, the other end portion of the second cylinder body is provided with the second spherical seal head, the second skirt edge is provided with a through hole, and the second spherical seal head is provided with an opening.
3. The camera system of claim 1, wherein the inner housing is made of plexiglass and the outer housing is made of quartz glass.
4. The camera system according to claim 1, wherein the mounting bracket includes a first transverse plate, a second transverse plate, a third transverse plate, a vertical rod and heat dissipation fins, the first transverse plate, the second transverse plate and the third transverse plate are sequentially arranged at intervals from top to bottom, the vertical rod penetrates through the first transverse plate, the second transverse plate and the third transverse plate, one end of the vertical rod is the first transverse plate, the other end of the vertical rod is the third transverse plate, and the heat dissipation fins are located between the second transverse plate and the third transverse plate and are uniformly distributed at equal angles relative to the vertical rod.
5. The camera system of claim 1, further comprising a control module, a sensor module and a gas supply, wherein the sensor module is disposed in the inner cover for measuring temperature, the control module is in communication with the sensor module, and the control module is electrically connected to the gas supply.
6. The camera system according to claim 5, wherein the control module comprises a switch, a power supply, a computer and an electrical connector, when the test is performed in a simulation container in a vacuum and low-temperature space environment, the computer, the power supply and the switch are disposed outside the simulation container, and the switch, the power supply, the computer and the camera module are electrically connected through the electrical connector and a teflon high and low temperature resistant cable.
CN202010008812.6A 2020-01-06 2020-01-06 Variable-view-angle camera system used in vacuum and high-low temperature environment Active CN111163251B (en)

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CN103354593A (en) * 2013-06-13 2013-10-16 北京航空航天大学 Camera system applicable to vacuum and cryogenic environment
CN203715707U (en) * 2014-02-28 2014-07-16 金川集团股份有限公司 Composite metal cylinder of titanium sponge reactor
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