JP6881840B2 - Image monitoring device and temperature control method for image monitoring device - Google Patents

Description

An embodiment of the present invention relates to an image monitoring device for photographing and monitoring the inside of a plant and a temperature control method for the image monitoring device.

In a nuclear plant, in order to grasp the situation of the fuel storage pool and core that store spent nuclear fuel in water and respond promptly even if an abnormality occurs, a monitoring camera is installed in the fuel storage pool, etc. It is necessary to install it above the equipment and constantly monitor it.

The image monitoring device for monitoring the inside of the nuclear plant should be able to continue monitoring important equipment such as the core and fuel storage pool even in the event of an emergency event such as a core meltdown accident due to an earthquake or tsunami. Is required.

Japanese Unexamined Patent Publication No. 2005-351655

When an emergency event occurs in a nuclear power plant, the inside of the plant may be in a high temperature and high humidity state exceeding 100 ° C., and the radiation dose may be extremely high. Under such a bad situation, it is difficult to maintain the shooting function with the structure of the conventional camera, such as the image sensor of the camera for shooting being damaged by high temperature.

The present invention has been made in consideration of such circumstances, and provides an image monitoring device and a temperature control method for an image monitoring device that can stably maintain an imaging function even in a poor environment such as a high temperature state. The purpose.

The image monitoring device according to the embodiment of the present invention is provided with a storage container in which a window through which light can pass is provided, a camera is housed inside, and the inside is evacuated, and a storage container inside the storage container. A cooling unit that absorbs heat from one surface of the camera by the supplied current and dissipates heat to the other surface, and a cooling unit that closes the storage container and is provided in contact with the outside air to dissipate heat from the cooling unit. A heat radiating portion that emits heat to the outside of the storage container, and one surface is provided so as to be connected to the back surface of the image pickup element of the camera, and the heat of the camera is conducted to the other surface connected to the cooling portion. A first heat conductive portion and a second heat conductive portion having one surface connected to the cooling portion and conducting heat radiation from the cooling portion to the other surface connected to the heat radiating portion. The cooling unit, the first heat conductive unit, and the second heat conductive unit are accommodated at a certain space from the inner surface of the accommodating container so as not to come into contact with the accommodating container, and the heat of the camera is provided. However, it is characterized in that a path is formed in which the first heat conduction portion, the cooling portion, the second heat conduction portion, and the heat dissipation portion are transmitted in this order.

In the temperature control method of the image monitoring device according to the embodiment of the present invention, a window through which light can pass is provided, a camera is housed inside, and a storage container in which the inside is evacuated is provided. Using the cooling unit provided inside the storage container, the step of absorbing the heat of the camera from one surface by the supplied current and radiating it to the other surface, and closing the storage container and the outside air. A step of discharging heat from the cooling unit to the outside of the storage container by using the contacting heat radiation unit, and a first heat conduction unit provided with one surface connected to the back surface of the image pickup element of the camera. Using the step of conducting the heat of the camera to the other surface connected to the cooling unit, and the second heat conduction unit provided with one surface connected to the cooling unit, the cooling unit is used. radiating only contains the steps of: conducting on the other surface connected to the heat radiating portion from the cooling portion, the first heat conductive portion, and the second heat conducting unit is not in contact with the container As described above, the path in which the heat of the camera is transmitted in the order of the first heat conduction part, the cooling part, the second heat conduction part, and the heat dissipation part is accommodated with a certain space from the inner surface of the storage container. It is characterized in that it is formed.

An embodiment of the present invention provides an image monitoring device and a temperature control method for an image monitoring device that can stably maintain an imaging function even in a poor environment such as a high temperature state.

The vertical sectional view which shows the structure of the image monitoring apparatus which concerns on 1st Embodiment. The explanatory view which shows the state which the camera is cooled in the image monitoring apparatus which concerns on this embodiment. The perspective view which shows the structure of the image monitoring apparatus which concerns on this embodiment. The block diagram which shows an example of the case where the image monitoring apparatus which concerns on this Embodiment is installed in order to monitor a fuel storage pool in a nuclear reactor building. The flowchart which shows the temperature control method of the image monitoring control apparatus which concerns on this embodiment. The vertical sectional view which shows the modification of the image monitoring apparatus which concerns on 1st Embodiment. The vertical sectional view which shows the structure of the image monitoring apparatus which concerns on 2nd Embodiment. The vertical sectional view which shows the structure of the image monitoring apparatus which concerns on 3rd Embodiment.

(First Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
The image monitoring device 10 according to the first embodiment shown in FIG. 1 absorbs heat from one surface of the storage container 11, the camera 13 provided inside the storage container 11, and the heat supplied by the camera 13 by the supplied current. Then, a cooling unit 16 that dissipates heat to the other surface and a heat radiating unit 20 that closes the storage container 11 and is provided in contact with the outside air to discharge heat radiated from the cooling unit 16 to the outside of the storage container 11. At least I have.

In this way, the image monitoring device 10 absorbs the heat of the camera 13 built in the storage container 11 by using the cooling unit 16 and releases the heat from the heat dissipation unit 20 to the outside of the storage container 11. The camera 13 can be maintained at a constant temperature with a simple configuration, and even when the camera 13 is installed in a high temperature environment, the shooting function of the camera 13 can be stably maintained.

A specific configuration will be described.
The storage container 11 is a hollow container, and a window 12 formed of glass or the like and through which light can pass is provided on the surface facing the object to be photographed. A camera 13, a cooling unit 16, a first heat conduction unit 17, and a second heat conduction unit 19 are housed inside the storage container 11. Then, a heat radiating portion 20 is connected to the lower part of the storage container 11 to close the space of the storage container 11.

The cooling unit 16, the first heat conductive unit 17, and the second heat conductive unit 19 are accommodated with a certain space from the inner surface of the accommodating container 11 so as not to come into contact with the accommodating container 11.

Further, it is desirable that the inside of the storage container 11 is brought into a vacuum state by sucking air using an intake port (not shown) provided in the storage container 11. By creating a vacuum state, the inside of the storage container 11 is insulated, and the inflow of heat from the outside can be prevented.

The camera 13 includes a lens 14 that collects light incident from the window 12, and an image sensor 15 that converts the light incident through the lens 14 into an electric signal. As the image sensor of the image sensor 15, a semiconductor element such as a CMOS image sensor or a CCD image sensor is used. In FIG. 1, the configurations of the aperture, shutter, etc. provided in the camera body are omitted.

The temperature sensor 22 is a sensor that measures the temperature of the camera 13 (particularly the image sensor 15) using a thermistor, a thermocouple, or the like. The temperature sensor 22 is arranged at a position where the temperature of the camera 13 can be grasped. For example, as shown in FIG. 1, it is arranged at the end of the image sensor 15. The temperature control method of the image monitoring device 10 using the measured temperature information will be described later.

The first heat conductive portion 17 is a plate-shaped metal having high heat conductivity. One surface of the first heat conduction unit 17 is connected to the back surface of the image sensor 15 of the camera 13 (the surface opposite to the light incident surface), and the other surface is connected to the cooling unit 16. .. The first heat conduction unit 17 conducts the heat of the camera 13 to the cooling unit 16. As the material used for the first heat conductive portion 17, a metal (for example, copper) having high thermal conductivity and stable in a high temperature environment is used.

When the cooling unit 16 is directly connected to the image sensor 15, the image sensor 15 is directly cooled by the cooling unit 16. In this case, a sudden temperature change may affect the operation of the image sensor 15. By providing a first heat conduction unit 17 between the image pickup element 15 and the cooling unit 16 and absorbing the heat conducted from the first heat conduction unit 17 by the cooling unit 16, the image pickup element 15 suddenly absorbs heat. It is possible to prevent various temperature changes.

The cooling unit 16 absorbs the heat of the camera 13 conducted through the first heat conductive unit 17 from one surface by the supplied current, and transfers the heat to the second heat conductive unit 19 connected to the other surface. It is an element that dissipates heat. An example is a Peltier element as the cooling unit 16.

A Peltier element is an element that can transfer heat from one surface to the other surface by electrically joining two dissimilar metals or semiconductors in series and passing a direct current. The Peltier element can adjust the amount of heat absorbed from one surface according to the supplied current value. Further, the Peltier element can be formed opposite to the endothermic surface and the heat radiating surface by reversing the direction of the supplied current. That is, it is possible to heat the camera 13 to raise the temperature, contrary to the normal cooling operation.

The second heat conductive portion 19 is a plate-shaped metal having high thermal conductivity like the first heat conductive portion 17. One surface of the second heat conductive portion 19 is connected to the cooling portion 16, and the other surface is connected to the heat radiating portion 20. The second heat conduction unit 19 conducts the heat radiated from the cooling unit 16 to the heat dissipation unit 20.

When the small cooling unit 16 and the large heat radiating unit 20 are directly connected, the heat from the cooling unit 16 may be dissipated and not sufficiently transferred to the heat radiating unit 20. By providing a second heat conductive unit 19 close to the size of the heat radiating unit 20 between the cooling unit 16 and the heat radiating unit 20, even when a small cooling unit 16 is used, the cooling unit 16 can be used. The heat can be efficiently transferred to the heat radiating unit 20.

The heat radiating section 20 is connected to the second heat conductive section 19 to close the storage container 11 and is provided in contact with the outside air. The heat radiating section 20 is made of a metal having high thermal conductivity, and releases the heat conducted from the second heat conductive section 19 to the outside of the storage container 11. In the lower part of the heat radiating portion 20, in order to increase the contact area with the outside air, a protrusion 21 in which a plurality of metal plates are arranged in a fin shape or a plurality of rod-shaped metals are arranged is provided.

Further, a hydrophilic film may be attached to the outer surface of the window 12. When the storage container 11 is installed above the fuel storage pool 50 which has reached a high temperature of 100 ° C. (see FIG. 4), water vapor is generated due to the evaporation of water in the pool, and the shooting environment becomes a mist atmosphere. It becomes. In this case, water droplets may adhere to the window 12 and the visibility may be deteriorated.

By attaching a hydrophilic film having a hydrophilic coating on the surface of the window 12 to the window 12 and arranging the window 12 downward and the storage container 11 at an angle, the water droplets adhering to the window 12 flow down. Therefore, it is possible to prevent water droplets from adhering to the window 12 and prevent deterioration of visibility.

FIG. 2 is an explanatory diagram showing a state in which the camera 13 is cooled in the image monitoring device 10 according to the present embodiment.

By supplying an electric current to the cooling unit 16, the heat of the camera 13 is conducted to the cooling unit 16 via the first heat conduction unit 17. Then, the cooling unit 16 absorbs the conducted heat and dissipates it to the second heat conductive unit 19.

Then, the second heat conduction unit 19 conducts the heat radiated from the cooling unit 16 to the heat dissipation unit 20. Finally, the heat dissipation unit 20 releases the heat conducted from the second heat conduction unit 19 to the outside of the storage container 11.

Since the two conduction portions and the cooling portion 16 are not in contact with the storage container 11, the heat of the camera 13 does not escape toward the container, and all the heat of the camera 13 is transferred to the first heat conduction portion 17 having high conductivity. Since the heat is sequentially conducted to the heat radiating portion 20, heat can be efficiently released to the outside.

FIG. 3 is a perspective view showing the configuration of the image monitoring device 10 according to the present embodiment (see FIG. 1 as appropriate).

The storage container 11 is provided with a cable outlet 24 for pulling out the three cables 23 (23a, 23b, 23c) out of the container. The three cables 23 are connected to the control device 25.

The camera control cable 23a is connected to the camera 13 inside the container, and transmits and receives control signals related to shooting conditions (shutter speed, etc.) in the camera 13. Further, the camera control cable 23a is connected to the temperature sensor 22, and transmits the temperature information measured by the temperature sensor 22 to the control device 25.

The camera image communication cable 23b is connected to the camera 13 inside the container, and transmits the image signal of the camera 13 to the control device 25.

The cooling unit control cable 23c is connected to the cooling unit 16 inside the container, and sends the direct current supplied from the control device 25 to the cooling unit 16. The control device 25 controls the amount of heat absorbed by the cooling unit 16 by adjusting the current value supplied to the cooling unit 16 based on the temperature of the camera 13 measured by the temperature sensor 22.

Subsequently, the temperature control method of the image monitoring device 10 will be specifically described.

FIG. 4 is a configuration diagram showing an example of a case where an image monitoring device 10 is installed to monitor the fuel storage pool 50 in the reactor building. In FIG. 4, the three cables 23 (23a, 23b, 23c) shown in FIG. 3 are shown as one cable 23.

The storage container 11 in which the camera 13 is housed is arranged so as to be fixed obliquely to the bottom surface of the gallery room in the reactor building. The cable 23 pulled out from the container extends to the outdoor part of the building and is connected to the control device 25.

The control device 25 includes a data receiving unit 26, an input display unit 27, a temperature data storage unit 28, and a current adjusting unit 29.

The function of each unit constituting the control device 25 is a storage medium including an external storage device such as an HDD (Hard Disk Drive) or an optical disk device in addition to a ROM (Read Only Memory) and a RAM (Random Access Memory). The predetermined program code stored in the storage circuit is executed in an electronic circuit such as a processor such as FPGA (Field Programmable Gate Array), PLD (programmable logic device), GPU (Graphics Processing Unit), or CPU (Central Processing Unit). It may be realized by the above, and is not limited to such software processing. For example, it may be realized by hardware processing using an electronic circuit such as ASIC, or it may be realized by combining software processing and hardware processing. You may.

The data receiving unit 26 receives the video signal transmitted from the camera 13, the temperature information of the camera 13 measured by the temperature sensor 22, the control signal related to the control of the camera 13, and the like via the cable 23.

The input display unit 27 monitors the fuel storage pool 50 based on the received video signal. Further, when the setting of the shooting conditions of the camera 13 is input by the observer, the control signal related to the setting of the camera 13 is transmitted to the camera 13.

The temperature data storage unit 28 stores a set temperature (set temperature range) that enables the image sensor 15 of the camera 13 to operate optimally. The set temperature can be changed as appropriate by the observer.

The current adjusting unit 29 inputs the temperature information of the camera 13 measured by the temperature sensor 22 from the data receiving unit 26. Then, the measured temperature of the camera 13 is compared with the set temperature stored in advance, and when the measured temperature exceeds the set temperature, the current value supplied to the cooling unit 16 is adjusted (increased or decreased).

The current adjusting unit 29 stores in advance the current values required for the temperature of the camera 13 to reach the set temperature when the measured temperature is not the set temperature for each of the measured temperatures. The current value required for each measurement temperature is obtained in advance by actual experimental data and simulation.

When the measurement temperature is lower than the set temperature, it is desirable to maintain the set temperature in order to operate the image sensor 15 optimally. Therefore, the direction of the current supplied to the cooling unit 16 is changed in reverse to change the direction of the camera. Heat may be applied to 13 to raise the temperature.

When the inside of the storage container 11 is evacuated, the inflow of heat into the container is eliminated, so that the temperature rises only due to the heat generated by the camera 13 itself. Therefore, a constant current is supplied to the cooling unit 16, the heat generated by the image sensor 15 is absorbed by the cooling unit 16, and the heat is dissipated from the heat radiating unit 20 to the outside, so that the temperature of the image sensor 15 is set to the optimum temperature. Can be held in.

However, when monitoring is performed for a long period of time, the degree of vacuum in the container gradually decreases, and the degree of vacuum deteriorates due to the influence of the outgas generated from the substrate of the image sensor 15, so that heat inflow may occur. In this case, since the amount of heat flowing into the container is added to the amount of heat generated by the image sensor 15, the temperature of the camera 13 gradually rises only with the current corresponding to the amount of heat generated by the image sensor 15.

In the present embodiment, by providing the current adjusting unit 29, the current value is adjusted based on the measured temperature of the camera 13, and the image sensor 15 is provided even when heat flows in from the outside. Can be cooled to keep the temperature of the camera 13 constant.

Further, since the camera 13 can be cooled by supplying an electric current to the cooling unit 16 using the cable 23 connected to the control device 25 in the outdoor part of the building, the cable 23 can be easily arranged, and a water cooling device or the like can be used. Since a large-scale device is not required, the image monitoring device 10 can have a simple and compact configuration.

FIG. 5 is a flowchart showing a temperature control method in the image monitoring device 10 (see FIGS. 1 and 4 as appropriate). It is assumed that a constant current corresponding to the amount of heat generated by the normal image sensor 15 first flows through the cooling unit 16.

The temperature sensor 22 measures the temperature of the camera 13 and transmits the measured temperature to the control device 25 (S10).

When the measured temperature exceeds the set temperature stored in the temperature data storage unit 28, the current adjustment unit 29 adjusts the current flowing through the cooling unit 16 (S11: YES, S12).
On the other hand, if the measured temperature is the set temperature is held without adjusting the current flowing in the cooling unit 16 (S1 1: NO).

The camera 13 is cooled by adjusting the current flowing through the cooling unit 16 (S13). Then, the current adjusting unit 29 adjusts the current and continues cooling until the temperature of the camera 13 reaches the set temperature (S14: NO).

On the other hand, when the temperature of the camera 13 reaches the set temperature, the temperature is returned to the normal current value and the temperature control is continued (S14: YES).

By adjusting the temperature while referring to the temperature information of the camera 13 in this way, the camera 13 can be maintained at a constant temperature even in a high temperature environment, and the shooting performance of the camera 13 can be stably maintained. can do.

FIG. 6 is a vertical cross-sectional view showing a modified example of the image monitoring device 10 according to the first embodiment.

The crimping portion 30 includes a plate 31 in which the first heat conductive portion 17 is inserted inside and is connected to the first heat conductive portion 17, and a support portion 32 in which one end is connected to the heat radiating portion 20 to support the plate 31. , Consists of. Then, the plate 31 and the support portion 32 are crimped to each other through a through hole formed in the plate 31 using a screw 33 or the like.

By crimping the plate 31 and the support portion 32, the first heat conductive portion 17 connected to the plate 31 is pressed downward, and the first heat conductive portion 17, the cooling portion 16, and the second heat conductive portion 19 are pressed. Adhere to each other. By bringing the first heat conduction unit 17, the cooling unit 16, and the second heat conduction unit 19 into close contact with each other, the heat of the camera 13 can be conducted to the heat dissipation unit 20 without loss.

The air cooling fan 34 is a fan provided in the vicinity of the heat radiating unit 20 to blow air to the heat radiating unit 20. By constantly blowing air to the heat radiating unit 20, the heat radiating efficiency of the heat radiating unit 20 can be improved.

(Second Embodiment)
FIG. 7 is a vertical cross-sectional view showing the configuration of the image monitoring device 10 according to the second embodiment. In FIG. 7, parts having the same configuration or function as that of the first embodiment (FIG. 1) are indicated by the same reference numerals, and redundant description will be omitted.

Note that FIG. 7 shows an example in which the FPGA substrate 37 for processing the signal or the like acquired by the image sensor 15 is mounted in the storage container 11 separately from the image sensor 15. The FPGA substrate 37 is arranged perpendicular to the incident surface of the image pickup device 15 at the end of the image pickup device 15. The first heat conduction section 17 is provided on the back surface of the FPGA substrate 37 and the image pickup device 15, and conducts the heat of each to the cooling section 16.

By the way, in a general camera, the lens surface of the lens 14 and the incident surface of the image sensor 15 are arranged in parallel as shown in FIG. That is, the light incident from the window 12 directly incidents on the image sensor 15 via the lens 14. In this case, when radiation is generated from the direction of the object to be imaged, the radiation is directly incident on the image sensor 15 together with the light.

When the image sensor 15 such as a CMOS image sensor used in the camera 13 is irradiated with radiation, the radiation may affect the function of each pixel constituting the sensor, and random noise may be generated in the image to be captured. .. When random noise is generated in the image, the visibility of the imaged object is reduced. Further, when the radiation dose is high, the image sensor 15 may be damaged.

Therefore, the image monitoring device 10 in the second embodiment is provided with a window 12 on the side surface of the storage container 11. Then, the camera 13 includes a reflection mirror 35 that reflects the incident light through the lens 14 provided parallel to the window 12 and changes the optical axis by 90 degrees. The light reflected by the reflection mirror 35 enters the image sensor 15 through a lens (not shown).

The light entry surface of the window 12 provided in the storage container 11 and the incident surface of the image sensor 15 have a positional relationship orthogonal to each other. Therefore, the radiation incident from the window 12 does not directly enter the image pickup device 15, and the influence of the radiation on the image pickup device 15 can be reduced.

Further, a shielding material 36 that shields radiation may be provided around the FPGA substrate 37 and the image pickup element 15. As the shielding material 36, lead or the like, which is a metal capable of shielding radiation, is used. A metal having a high density (for example, tungsten) is preferable from the viewpoint of being thin and reducing the weight while maintaining the shield.

In this way, by providing the reflection mirror 35 on the camera 13 and arranging the shielding material 36, it is possible to remove the radiation incident on the image sensor 15, so that the photographing performance can be improved even in a place having a high radiation amount. Can be maintained.

(Third Embodiment)
FIG. 8 is a vertical cross-sectional view showing the configuration of the image monitoring device 10 according to the third embodiment. In FIG. 8, parts having the same configuration or function as those of the first embodiment (FIG. 1) are indicated by the same reference numerals, and duplicate description will be omitted.

In the image monitoring apparatus 10 in the third embodiment, a plurality of cooling section 16 ₍₁₆ 1, 16 ₂₎ is arranged between the camera 13 and the heat radiating portion 20. The two cooling units 16 are joined by a joining member 38 such as indium. Although FIG. 8 shows an example in which the two cooling units 16 are arranged, the cooling units 16 may be further increased and arranged in multiple layers.

The controller 25 (FIG. 3), based on the temperature information sent from the temperature sensor 22, so that the temperature of the camera 13 is set temperature, adjusting the current flowing through the respective cooling units 16 _1, 16 _2.

Specifically, the cooling unit 16 ₂ located farther from the imaging device 15, the control device 25 large, medium, keep the settable small and rough three current values. The control device 25 sets one of the current values based on the temperature information transmitted from the temperature sensor 22, and constantly supplies the current. On the other hand, the cooling unit 16 _1, the current value is finely adjusted based on the temperature information sent from the temperature sensor 22.

Incidentally, with respect to the measured temperature of the camera 13, the temperature of the optimum combination of the cooling unit 16 ₁ and the cooling unit 16 ₂ (combination as camera 13 reaches the set temperature) in advance by actual experimental data and simulation Ask.

By providing the plurality of cooling units 16 and adjusting the current in this way, it is possible to accurately cool the camera 13 so that the temperature of the camera 13 becomes the set temperature.

According to the image monitoring device of each of the above-described embodiments, the heat contained in the camera built in the storage container is absorbed by the cooling unit, and this heat is released from the heat dissipation unit to the outside of the storage container. Even in adverse environments such as high temperature, high humidity (100%), and high radiation, which exceed 100 ° C, it is possible to cool the camera with a simple configuration and maintain stable shooting functions. it can.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof. In this embodiment, the configuration in which the image monitoring device is installed in the nuclear power plant has been described as an example, but this embodiment is also carried out when camera photography is required in an environment such as high temperature (for example, inside a thermal power plant). The form is applicable.

10 ... image monitoring apparatus, 11 ... container, 12 ... window, 13 ... camera, 14 ... lens, 15 ... imaging element, 16 ₍₁₆ 1, 16 ₂₎ ... cooling unit, 17 ... first heat conductive portion, 19 ... 2nd heat conduction part, 20 ... heat dissipation part, 21 ... protrusion, 22 ... temperature sensor, 23 ... cable, 23a ... camera control cable, 23c ... cooling part control cable, 23b ... camera image communication cable, 24 ... cable Exit, 25 ... Control device, 26 ... Data reception unit, 27 ... Input display unit, 28
... Temperature data storage unit, 29 ... Current adjustment unit, 30 ... Crimping part, 31 ... Plate, 32 ... Support part, 33 ... Screw, 34 ... Air cooling fan, 35 ... Reflective mirror, 36 ... Shielding material, 37 ... FPGA substrate, 38 ... Joining member, 50 ... Pool for fuel storage.

Claims (9)

A storage container with a window through which light can pass, the camera is housed inside, and the inside is evacuated.
A cooling unit provided inside the storage container, which absorbs the heat of the camera from one surface by the supplied current and dissipates the heat to the other surface.
A heat radiating unit that closes the storage container and is provided in contact with the outside air to discharge heat radiated from the cooling unit to the outside of the storage container.
A first heat conductive portion that is provided with one surface connected to the back surface of the image sensor of the camera and conducts heat of the camera to the other surface connected to the cooling portion.
A second heat conductive portion, which is provided with one surface connected to the cooling unit and conducts heat radiation from the cooling unit to the other surface connected to the heat radiating unit, is provided.
The cooling unit, the first heat conduction unit, and the second heat conduction unit are housed at a certain space from the inner surface of the storage container so as not to come into contact with the storage container, and the heat of the camera is transferred. An image monitoring device characterized in that a path transmitted in the order of the first heat conduction portion, the cooling portion, the second heat conduction portion, and the heat dissipation portion is formed. A temperature sensor that measures the temperature of the camera and
The image monitoring device according to claim 1, further comprising a control device that adjusts a current supplied to the cooling unit based on the measured temperature. The control device is
A data reception unit that acquires the temperature measured by the temperature sensor, and
By comparing the pre-acquired and stored set temperature temperature, and a current adjusting unit for adjusting the current supplied to the cooling unit such that the set temperature, to claim 2, characterized in that it comprises a The image monitoring device described. A plurality of the cooling portions are arranged between the camera and the heat radiating portion.
The image monitoring device according to claim 2 or 3 , wherein the control device adjusts a current flowing through each of the cooling units. The window is provided on the side surface of the storage container.
Any of claims 1 to 4 , wherein the camera includes a reflection mirror that reflects light incident on the lens through a lens provided parallel to the window and changes the optical axis by 90 degrees. The image monitoring device according to paragraph 1. The image monitoring device according to claim 5 , wherein a shielding material that shields radiation is provided around the image sensor of the camera. The image monitoring device according to any one of claims 1 to 6 , wherein a hydrophilic film is attached to the outer surface of the window. There is a window through which light can pass, a camera is housed inside, and a storage container with a vacuum inside is provided .
A step of absorbing the heat of the camera from one surface by a supplied current by using a cooling unit provided inside the container and dissipating the heat to the other surface.
A step of closing the storage container and using a heat radiating unit in contact with the outside air to release heat radiation from the cooling unit to the outside of the storage container.
A step of conducting heat of the camera to the other surface connected to the cooling unit by using a first heat conduction portion provided with one surface connected to the back surface of the image sensor of the camera.
Using the second thermal conductive portion having one face arranged in connection with the cooling section, seen including the steps of: conducting on the other surface of the heat radiation is connected to the heat radiating portion from the cooling unit,
The cooling unit, the first heat conduction unit, and the second heat conduction unit are housed at a certain space from the inner surface of the storage container so as not to come into contact with the storage container, and the heat of the camera is transferred. A temperature control method for an image monitoring device, wherein a path is formed in which the first heat conduction portion, the cooling portion, the second heat conduction portion, and the heat dissipation portion are transmitted in this order. The step of measuring the temperature of the camera and
The temperature control method for an image monitoring device according to claim 8 , further comprising a step of adjusting a current supplied to the cooling unit based on the measured temperature.

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