CN113891047A - Real-time image acquisition system under fire experiment scene - Google Patents

Real-time image acquisition system under fire experiment scene Download PDF

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Publication number
CN113891047A
CN113891047A CN202111176624.5A CN202111176624A CN113891047A CN 113891047 A CN113891047 A CN 113891047A CN 202111176624 A CN202111176624 A CN 202111176624A CN 113891047 A CN113891047 A CN 113891047A
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water cooling
camera
real
cooling device
protection
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CN202111176624.5A
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CN113891047B (en
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王禹
徐明俊
方正
张曼曼
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University of Science and Technology of China USTC
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University of Science and Technology of China USTC
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/18Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/181Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
    • 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
    • H04N23/50Constructional details
    • H04N23/52Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Devices (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

The invention discloses a real-time image acquisition system under a fire experiment scene, which belongs to the technical field of building fire safety and comprises a real-time video recording system, a thermal protection facility and a cooling device, wherein the real-time video recording system comprises a data acquisition instrument and a camera which are connected through a data transmission wire, the thermal protection facility comprises a first protection part and a thermal protection structure, the cooling device comprises a water cooling device, the water cooling device is arranged in a cavity of a wall body of an experiment cavity, the camera is arranged in the water cooling device, the water cooling device is provided with a protection opening, the protection opening is provided with the first protection part, a lens of the camera corresponds to the protection opening in position, and the thermal protection structures are respectively coated outside the data transmission wire and the water cooling device. The invention utilizes the water cooling device to cool the camera, and utilizes the thermal protection facility to thermally protect the real-time video recording system, thereby overcoming the problem that the image acquisition system is damaged due to overhigh temperature of the cavity in the conventional fire experiment, and the image can not be acquired.

Description

Real-time image acquisition system under fire experiment scene
Technical Field
The invention relates to the technical field of building fire safety, in particular to a real-time image acquisition system in a fire experiment scene.
Background
The building fire frequently threatens the life safety and property loss of people, and the research on the building chamber fire has extremely important value on the prevention and treatment of the building fire. In an actual fire scenario, a fire typically goes through four stages, including an initial stage, a hard burn, a growth stage, and a decay stage. With the development of fire, a fire scene can generate a large amount of high-temperature hot smoke, the temperature of the fire scene can reach 800 ℃ at most or even higher, and how to record the development process of the building fire becomes a difficult problem of building fire research.
The video record carrier of a conventional general video camera usually carries a memory card by itself, and data cannot be transmitted and stored to a secure area in real time. With the development of fire, cameras and memory cards placed in the fire scene are likely to be damaged or even burned out due to the direct action of high-temperature hot smoke or flames, thereby losing valuable experimental videos. Although the common monitoring system can transmit and record data in real time, due to the temperature resistance limit of the material of the common monitoring system, the real-time overview of the fire development can be recorded only at the initial stage of the fire and the stage of low fire temperature. Once a fire disaster develops to a comprehensive development stage, the temperature of a fire scene is high, a common monitoring system is damaged or even burnt out, and recording is stopped, so that fire scene image data after the fire disaster bombs and the bombs cannot be obtained.
Due to the influence of high-temperature hot smoke, hot air and flame in a fire scene in a fire experiment, recording of the fire scene overview becomes a big problem for building fire researchers, and the recording of the fire scene overview plays a very important role in understanding fire development laws of the researchers and making fire protection strategies. At present, the research on real-time video in a fire experiment scene is less, and only some applicable backgrounds are research schemes of industrial high-temperature places (such as a metallurgical plant, a steel plant, a boiler house, a hardware processing plant and the like). The industrial high-temperature place and the high-temperature fire place have great difference, for example, the industrial high-temperature place generally has no influence of factors such as high-temperature fire smoke, flame and the like, and the high-temperature industrial place mainly influences external video equipment through hot air, and the temperature of the flame is lower compared with the temperature of the high-temperature hot air, generally does not exceed 300 ℃, but the highest temperature under a fire experiment scene may reach 800 ℃ or even higher. Therefore, the camera system suitable for the industrial high-temperature place is generally difficult to bear the direct action of flame in the fire experiment scene. In addition, once the high-temperature hot smoke in the fire scene contacts the lens of the camera, shielding influence may be generated, so that the camera cannot continuously acquire image data.
Therefore, the imaging device applied to the industrial high-temperature place is difficult to be applied to the fire experiment scene.
Disclosure of Invention
The invention aims to provide a real-time image acquisition system in a fire experiment scene, and aims to solve the problem that the existing image acquisition scheme cannot be applied to image acquisition in the fire experiment scene.
In order to achieve the above object, the present invention provides a real-time image acquisition system in a fire experiment scene, comprising: real-time video recording system, hot protective device and cooling device, wherein, real-time video recording system includes the camera, data transmission wire and data acquisition instrument, the camera is connected with the data acquisition instrument through the data transmission wire, hot protective device includes first guard portion, the hot protective structure of first heat protective structure and second, cooling device includes water cooling plant, water cooling plant arranges in experiment cavity wall body cavity, the camera is arranged inside water cooling plant, water cooling plant has seted up the protection mouth, first guard portion is installed to the protection mouth, the camera lens of camera and protection mouth are seted up the position and are corresponded, the outside cladding of data transmission wire has first hot protective structure, the outside cladding of water cooling plant has the hot protective structure of second.
Optionally, the thermal protection facility further includes a second protection portion, the second protection portion is disposed on one side of the protection port away from the camera, and the second protection portion is installed on the wall surface of the experiment chamber.
Optionally, the first protection part and the second protection part both adopt quartz glass, and the silica content of the quartz glass is greater than 99.5% and the quartz glass is resistant to high temperature of 1100 ℃.
Optionally, first hot protective structure with the hot protective structure of second all includes thermal-insulated cotton of fire prevention and tin foil paper, the data transmission wire is outside reaches the outside parcel of water cooling plant has thermal-insulated cotton of fire prevention, the outside cladding of thermal-insulated cotton of fire prevention has tin foil paper.
Optionally, the camera is a common camera or a common surveillance camera or an infrared surveillance camera.
Optionally, the bottom of the water cooling device is connected with a supporting seat, universal wheels are installed at the bottom of the supporting seat, and the universal wheels are fixed on the wall surface of the experimental cavity.
Optionally, the water cooling device includes water cooling cover and afterbody panel, water cooling cover and afterbody panel fixed connection, and the inside direction of water cooling cover is provided with the support frame on the afterbody panel, the camera is installed on the support frame, and the water cooling cover is the cavity structure that supplies water to flow, and water cooling cover upper portion sets up the outlet pipe, the lower part sets up the inlet tube, outlet pipe and inlet tube and cavity intercommunication.
Optionally, the cooling device further comprises an air cooling device, and the air cooling device is arranged on the outer wall of the water cooling cover and located in the cavity of the wall body of the experimental chamber.
Optionally, the air cooling device comprises at least one heat radiation fan arranged on the outer wall surface of the water cooling cover.
Compared with the prior art, the invention has the following technical effects: according to the invention, the first protection part is arranged at the protection port of the water cooling device, the second protection part is arranged on the wall surface of the experiment cavity wall body at the side of the protection port far away from the camera, hot flue gas, hot air and flame in the cavity are separated from the real-time video recording system through the second protection part, so that the damage of the hot flue gas, the hot air and the flame to the real-time video recording system in the fire development process is weakened, and meanwhile, secondary isolation is carried out through the first protection part, so that the experiment process can be completely recorded. Meanwhile, the camera is arranged in the water cooling device, the type can be selected according to specific experimental requirements, a common camera or a common monitoring camera or an infrared monitoring camera can be adopted, image data captured by the front-end camera is transmitted to the rear-end data acquisition instrument through the data transmission lead in real time for real-time storage, the water cooling device and the data transmission lead are externally coated with a thermal protection structure, and the problem that the data of the traditional camera is lost due to self damage in a high-temperature fire scene is solved. Carry out cooling to the camera through water cooling plant, overcome in the past in the conflagration experiment because the cavity temperature is too high and damage the problem that image acquisition facility and then lead to the unable collection of image, and system simple structure, low cost.
Drawings
The following detailed description of embodiments of the invention refers to the accompanying drawings in which:
FIG. 1 is a side view of a real-time image acquisition system in a fire experimental scenario in accordance with the present invention;
FIG. 2 is a block diagram of the cooling apparatus of the present invention;
FIG. 3 is a block diagram of the real-time video recording system of the present invention;
fig. 4 is a block diagram of the thermal protection structure of the present invention.
In the figure:
1-a camera, 2-a water cooling cover, 3-a water outlet pipe, 4-a water inlet pipe, 5-a universal wheel, 6-a second protection part, 7-a third screw, 8-a first protection part, 9-a data transmission wire, 10-a first thermal protection structure, 11-a data acquisition instrument, 12-a wall surface of an experimental cavity, 13-a base and 14-a supporting seat; 15-air cooling device; 16-a second thermal protection structure; 17-cavity of the wall body of the chamber, 18-tail panel, 19-first screw, 20-support frame, 21-second screw and 22-wall of the experimental chamber.
Detailed Description
To further illustrate the features of the present invention, refer to the following detailed description of the invention and the accompanying drawings. The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure.
As shown in fig. 1 to 4, the present embodiment discloses a real-time image capturing system under a fire experiment scene, including: real-time video recording system, hot protective device and cooling device, wherein, real-time video recording system includes camera 1, data transmission wire 9 and data acquisition instrument 11, camera 1 is connected with data acquisition instrument 11 through data transmission wire 9, hot protective device includes first protection portion 8, first hot protective structure 10 and the hot protective structure 16 of second, cooling device includes water cooling plant, water cooling plant arranges in experiment cavity wall cavity 17, camera 1 arranges inside water cooling plant, water cooling plant has seted up the protection mouth, first protection portion 8 is installed to the protection mouth, camera 1's camera lens sets up the position with the protection mouth and corresponds, the outside cladding of data transmission wire 9 has first hot protective structure 10, the outside equal cladding of water cooling plant has the hot protective structure 16 of second.
As a further preferred embodiment, as shown in FIG. 4, FIG. 4- (b) is a sectional view taken along the direction C-C in FIG. 4- (a); the thermal protection facility further comprises a second protection part 6, the second protection part 6 is arranged on one side of the camera, away from the protection opening, and the second protection part 6 is arranged on the wall surface of the experimental chamber.
It should be noted that, when a fire experiment is performed, a cavity for placing the real-time image acquisition system is formed in a wall body of an experiment cavity, the camera 1 is placed in the water cooling device, the camera 1 is cooled by using cold water, the real-time video recording system is separated from a high-temperature fire scene by using the second protection part 6, so that the heat damage of high-temperature smoke, hot air and flame in the fire scene to the real-time video recording system can be weakened, and meanwhile, the safety of the image acquisition system can be greatly improved by performing secondary isolation through the first protection part 8; meanwhile, image data captured by the front-end camera is transmitted to the rear-end data acquisition instrument 11 through the data transmission lead 9 to be stored in real time, and the data transmission lead 9 is subjected to thermal protection by adopting the thermal protection structure 10, so that the problem that the data of the traditional camera is lost due to self damage in a high-temperature fire scene can be solved.
As a further preferable technical solution, both the first protective part 8 and the second protective part 6 adopt transparent quartz glass, and the silica content of the quartz glass is more than 99.5%, and the quartz glass can resist high temperature 1100 ℃ for a long time.
It should be noted that, first guard portion 8 and 6 parallel arrangement of second guard portion make things convenient for the camera to find a view, and the thermal radiation in scene of a fire carries out attenuation for the first time through second guard portion 6, carries out attenuation once more through first guard portion 8, has improved the security of camera greatly through setting up first guard portion 8 and second guard portion 6.
As a further preferable technical solution, in this embodiment, the quartz glass contains more than 99.5% of silica, can resist a high temperature of 1100 ℃ for a long time, has a size of 250mm (length) × 250mm (width) × 6mm (thickness), and is fixedly mounted on the wall surface 12 of the chamber wall by a high temperature resistant screw iii 7, so as to separate the hot flue gas, the hot air and the flame in the chamber from the real-time video recording system, and weaken the damage of the hot flue gas, the hot air and the flame to the real-time video recording system in the fire development process, so as to ensure that the experimental process can be completely recorded.
As a further preferred technical scheme, first hot protective structure 10 and the hot protective structure 16 of second all include fire prevention thermal-insulated cotton and tin foil paper, data transmission wire 9 is outside reaches the outside parcel of water cooling plant has fire prevention thermal-insulated cotton, the outside cladding of fire prevention thermal-insulated cotton has the tin foil paper.
It should be noted that the data transmission line 9 is wrapped with fireproof heat insulation cotton to thermally protect the data transmission line 9, and then the fireproof heat insulation cotton is wrapped with tin foil paper, so that the tin foil paper has both the fixing and heat insulation functions. After the camera 1 and the water cooling device are installed before the experiment, fireproof heat-insulating cotton is wrapped outside the water cooling device and fixed by tin foil paper, and the fireproof heat-insulating cotton can carry out heat protection on the water cooling device and internal components of the water cooling device.
As a further preferable technical solution, the camera 1 adopts a common camera or a common surveillance camera or an infrared surveillance camera.
It should be noted that, the camera 1 is arranged in the water cooling device, and the type can be selected according to specific experimental requirements, for example, under a certain experimental condition, the fire source is fixed, the temperature of the fire scene is relatively low, and for convenience of image data acquisition, the camera with a memory card can be selected; if fire load is distributed and arranged under a certain experimental condition, the temperature of a fire scene is difficult to predict, a real-time recording camera can be selected, and image data is transmitted to a collecting instrument of a safe area in real time through a data transmission lead 9; under other experimental conditions, the cameras meeting the requirements can be selected according to specific requirements.
In this embodiment, the camera may be an infrared monitoring camera, or a general camera, and may be type-selected according to the needs of a specific fire experiment. When the camera is an infrared monitoring camera or a common monitoring camera, the internal profile of the fire scene can be transmitted to the data acquisition instrument 11 in real time through the data transmission lead 9 and stored in real time. When the infrared monitoring camera is adopted, the fire scene general situation can be captured through fire smoke, and the difficulty that a common camera and a common monitoring camera cannot capture a scene due to the influence of smoke shielding is overcome.
As a further preferred technical scheme, the bottom of the water cooling device is connected with a supporting seat 14, a universal wheel 5 is installed at the bottom of the supporting seat 14, and the universal wheel 5 is fixed on the wall surface 12 of the experimental chamber.
It should be noted that the universal wheel 5 is connected with the water cooling device through the supporting seat 14, before the experiment, a cavity wall cavity 17 with a proper size is cut on an experiment cavity wall 22, the universal wheel 5 is fixedly connected with a wall inner cavity wall 12 through the base 13, and the shooting direction is adjusted through the universal wheel 5 to obtain the best shooting angle for the experiment.
As a further preferred technical means, as shown in FIG. 2, among them, FIG. 2- (B) is a structural view of a cooling apparatus, FIG. 2- (a) is a sectional view taken along A-A of FIG. 2- (B), and FIG. 2- (c) is a sectional view taken along B-B of FIG. 2- (B); the water cooling device comprises a water cooling cover 2 and a tail panel 18, the water cooling cover 2 is fixedly connected with the tail panel 18 through a first screw 19, a support frame 20 is arranged on the tail panel 18 in the direction towards the inside of the water cooling cover 2, the camera is mounted on the support frame 20 through a second high-temperature-resistant screw 21, the water cooling cover 2 is of a cavity structure in which water flows, a water outlet pipe 3 is arranged at the upper part of the water cooling cover 2, a water inlet pipe 4 is arranged at the lower part of the water cooling cover, and the water outlet pipe 3 and the water inlet pipe 4 are communicated with the cavity; the protection mouth has been seted up to water cooling cover 2 front end and has been used for installing first guard portion 8, and first guard portion 8 can block in water cooling cover 2's protection mouth or through the screw installation, and 2 bottom connections of water cooling cover have supporting seat 14 to be used for installing universal wheel 5.
It should be noted that, all the screws used in the real-time image capturing system in this embodiment are made of 304 stainless steel, so as to have high temperature resistance.
As a further preferable technical solution, the cooling device further includes an air cooling device 15, and the air cooling device 15 is disposed on the outer wall of the water cooling jacket 2 and located in the cavity 17 of the wall body of the experimental chamber.
It should be noted that, the water cooling cover 2 is a double-layer structure, cooling water enters from the lower water inlet pipe 4 and is discharged from the upper water outlet pipe 3, and a real-time video recording system arranged in the water cooling cover 2 is cooled by using cooling water flow, and the cooling effect is good; meanwhile, cooling air generated by the air cooling device 15 forms flowing air flow in the cavity of the water cooling device and the wall body of the experimental chamber, so that the temperature of air in the cavity is reduced, and the cooling effect is further enhanced; through setting up water cooling plant and 15 air cooling plants and carrying out dual cooling to real-time video recording system, overcome in the past in the conflagration experiment because the cavity temperature is too high and damage the problem that image acquisition facility and then lead to the unable collection of image.
As a further preferable technical solution, the air cooling device 15 includes at least one heat radiation fan disposed on an outer wall surface of the water cooling cover 2.
It should be noted that the wind direction of the heat dissipation fan is as shown by an arrow in fig. 1, or may be the opposite direction as shown by the arrow, so as to ensure that flowing air flows are formed between the water cooling jacket 2 and the cavity of the wall of the cavity, and reduce the temperature of the air in the cavity.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. The utility model provides a real-time image acquisition system under fire experiment scene which characterized in that includes: real-time video recording system, hot protective device and cooling device, wherein, real-time video recording system includes the camera, data transmission wire and data acquisition instrument, the camera is connected with the data acquisition instrument through the data transmission wire, hot protective device includes first guard portion, the hot protective structure of first heat protective structure and second, cooling device includes water cooling plant, water cooling plant arranges in experiment cavity wall body cavity, the camera is arranged inside water cooling plant, water cooling plant has seted up the protection mouth, first guard portion is installed to the protection mouth, the camera lens of camera and protection mouth are seted up the position and are corresponded, the outside cladding of data transmission wire has first hot protective structure, the outside cladding of water cooling plant has the hot protective structure of second.
2. The system for acquiring real-time images under a fire experiment scene as claimed in claim 1, wherein the thermal protection facility further comprises a second protection part, the second protection part is arranged on the side of the protection port far away from the camera, and the second protection part is installed on the wall surface of the experiment chamber.
3. The system for acquiring real-time images under a fire experiment scene as claimed in claim 2, wherein the first protection part and the second protection part are made of quartz glass, the silica content of the quartz glass is more than 99.5%, and the quartz glass is resistant to high temperature of 1100 ℃.
4. The system for acquiring real-time images under a fire experiment scene as claimed in claim 1, wherein the first thermal protection structure and the second thermal protection structure both comprise fireproof heat insulation cotton and tin foil paper, the fireproof heat insulation cotton is wrapped outside the data transmission lead and the water cooling device, and the tin foil paper is wrapped outside the fireproof heat insulation cotton.
5. A real-time image acquisition system under fire experiment scene as claimed in any one of claims 1-4, characterized in that the camera is a common camera or a common surveillance camera or an infrared surveillance camera.
6. The system for acquiring real-time images under the fire experiment scene as claimed in any one of claims 1 to 4, wherein a supporting seat is connected to the bottom of the water cooling device, and universal wheels are mounted at the bottom of the supporting seat and fixed on the wall surface of the experiment chamber.
7. The system for real-time image acquisition under fire experiment scene as claimed in any one of claims 1 to 4, wherein the water cooling device comprises a water cooling cover and a tail panel, the water cooling cover is fixedly connected with the tail panel, a support frame is arranged on the tail panel towards the inside of the water cooling cover, the camera is mounted on the support frame, the water cooling cover is a cavity structure for water supply flow, a water outlet pipe is arranged at the upper part of the water cooling cover, a water inlet pipe is arranged at the lower part of the water cooling cover, and the water outlet pipe and the water inlet pipe are communicated with the cavity.
8. The system for acquiring the real-time image under the fire experiment scene as claimed in claim 7, wherein the cooling device further comprises an air cooling device, and the air cooling device is arranged on the outer wall of the water cooling cover and is positioned in the cavity of the wall body of the experiment chamber.
9. The system for real-time image acquisition under fire experiment scene as claimed in claim 8, wherein the air cooling device comprises at least one heat radiation fan arranged on the outer wall surface of the water cooling cover.
CN202111176624.5A 2021-10-09 2021-10-09 Real-time image acquisition system under fire experiment scene Active CN113891047B (en)

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CN211362271U (en) * 2019-09-09 2020-08-28 山东鼎维数字技术有限公司 Explosion-proof transformer substation inspection robot
CN112216060A (en) * 2020-10-21 2021-01-12 淮北市盛世昊明科技服务有限公司 Intelligent fire-fighting terminal information acquisition system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5835806A (en) * 1997-02-26 1998-11-10 The United States Of America As Represented By The Secretary Of Agriculture Passive self-contained camera protection and method for fire documentation
JP2004266474A (en) * 2003-02-28 2004-09-24 Hitachi Kokusai Electric Inc Water-cooled camera case
CN104469090A (en) * 2013-09-13 2015-03-25 天津宇内通通信技术有限公司 A heat resistant anti-explosive camera
CN205453864U (en) * 2015-12-10 2016-08-10 四川雅化实业集团股份有限公司 Video monitor system for explosion hazard area
CN109167906A (en) * 2018-11-01 2019-01-08 北京力升高科科技有限公司 A kind of high temperature resistant monitoring system
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CN209823858U (en) * 2019-04-12 2019-12-20 马鞍山市科泰电气科技有限公司 High-temperature heat-insulation protective cover for furnace nose camera
CN211362271U (en) * 2019-09-09 2020-08-28 山东鼎维数字技术有限公司 Explosion-proof transformer substation inspection robot
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CN112216060A (en) * 2020-10-21 2021-01-12 淮北市盛世昊明科技服务有限公司 Intelligent fire-fighting terminal information acquisition system

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