JP2015059873A - Environmental test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an environmental test device including a camera unit that has versatility, takes measures against the environment in a test tank, and has a large photographable range.SOLUTION: An environmental test device 1 includes a camera unit 10. The camera unit 10 includes: a duplex tube 11 formed of a transparent outer tube 12 and a transparent inner tube 13 disposed in the outer tube 12 so as to create a clearance between the inner tube 13 and the inner peripheral surface of the outer tube 12; an air blower 14 for feeding external air to the clearance between the outer tube 12 and inner tube 13; a camera 15 that is disposed in the inner tube 12 and has an imaging element 15a for photographing the inside of a test tank 3 via the duplex tube 11; and a movement mechanism 17 for moving the camera 15. The duplex tube 11 is inserted into an engagement hole 31 of a plug body 30 fitted into through holes 5a and 5b communicating the inside of the test tank 3 with the outside thereof.

Description

  The present invention relates to an environmental test apparatus that performs an environmental test on a DUT.

  2. Description of the Related Art Conventionally, an environmental test has been performed in which a test object such as an electronic device is accommodated in a test tank in an environmental test apparatus, and the test object is tested in various environments. Here, the various environments are environments of desired temperature and humidity, for example, environments of high temperature and low temperature, high humidity and low humidity. And in order to observe the behavior of the DUT being tested without changing the environment of the environmental test apparatus, the camera is photographed through an observation window provided on the door of the environmental test apparatus, A camera or an industrial endoscope is inserted into a test tank and a test object is photographed (see Patent Document 1).

  However, when shooting with the camera through the observation window provided on the door, a camera fixing jig is installed on the door, and the camera and the entire observation window are covered with a dark box that prevents reflection to obtain a good image. There was a need. Therefore, in order to fix the camera fixing jig and dark box, the door had to be modified. Further, since the camera fixing jig and the dark box are fixed to the door, there is a problem that the door cannot be easily opened and closed. Furthermore, since the image is captured by the camera through the observation window, there is a problem that the imageable range is determined and the behavior of the DUT cannot be observed from various angles.

  In addition, when a camera or industrial endoscope is inserted into the test tank and the object to be tested is photographed, a hole to be inserted into the environmental test device is formed so that the camera or industrial endoscope can be photographed inside the test tank. Or modification of the camera or industrial endoscope, it becomes a dedicated product, lacks versatility, and cannot be diverted to other environmental test apparatuses. Moreover, in the environmental test apparatus, environmental tests are performed in various environments in the test tank. Therefore, measures against the environment in the test tank (for example, for cameras and industrial endoscopes inserted in the test tank) It is necessary to take measures against heat and measures to prevent condensation and freezing.

Japanese Utility Model Publication No. 6-43552

  In view of this, an environment test apparatus having a camera unit having a wide photographing range while providing a general versatility to a general environment test apparatus and taking measures against the environment in the test tank is provided.

  An environmental test apparatus according to the present invention includes a test tank in which a test object is disposed inside and a through-hole that communicates the inside and the outside is formed, with respect to the test object disposed in the test tank. An environmental test apparatus for performing a test by changing the environment, wherein the transparent inner tube is disposed in the outer tube so that a gap is formed between the transparent outer tube and the inner peripheral surface of the outer tube. A double pipe constituted by a pipe, a blower for sending gas into a gap between the outer pipe and the inner pipe, and an inside of the inner pipe, and photographing the inside of the test tank through the double pipe A camera unit including a camera having an image sensor and a moving mechanism for moving the camera is provided, and the double tube is inserted into the through hole.

  According to the environmental test apparatus according to the present invention, the configuration of the test tank is the conventional one by inserting the double pipe through the through hole for drawing the wiring provided in the general environmental test apparatus into the test tank. The camera unit can be attached without changing from the above, and has versatility. In addition, by moving the camera with the moving mechanism, it is possible to photograph a wide range in the test tank. In addition, by sending outside air into the gap between the outer tube and the inner tube with a blower, the temperature inside the inner tube is prevented from changing according to the temperature in the test tank, and the camera operation is not affected. And good images can be obtained. Then, by connecting the camera unit to a computer or a video, it is possible to easily observe the object under test in the test tank, to capture still images, to shoot moving images, to perform interval shooting, and the like.

The environmental test apparatus preferably further includes a heating element disposed on an outer peripheral surface of the outer tube.
Thereby, it is possible to prevent the outer tube from being condensed or frozen by the temperature and humidity in the test tank. That is, due to the temperature difference between the temperature in the test tank and the inside of the double tube, the air in the vicinity of the outer tube is cooled, and condensation or freezing occurs on the inner peripheral surface or outer peripheral surface of the outer tube. Therefore, the heat generating element disposed on the outer peripheral surface of the outer tube generates heat, thereby preventing condensation or freezing from occurring on the outer tube.

In the environmental test apparatus, it is preferable that an insertion hole into which the double pipe is fitted is formed, and a plug body fitted into the through hole is further provided so that the inside of the test tank is kept airtight.
Thereby, while a camera unit is hold | maintained by a stopper, attachment / detachment to a through-hole can be performed easily. In addition, since external air does not enter the test tank of the environmental test apparatus, the air tightness of the test tank can be maintained, and the environmental test in the environmental test apparatus can be accurately performed.

In the environmental test apparatus, the double tube has a cylindrical shape with one end closed, and is inserted into the through hole so that the one end faces the test chamber. It is preferable that the camera is arranged at the one end in the double tube and the moving mechanism is capable of changing the direction of the camera so that a photographing direction by the image sensor changes.
Thereby, it can respond to the environmental test apparatus which has one or more through-holes. Further, by moving the camera with a moving mechanism so that the shooting direction by the image sensor changes, a wide range in the test tank can be shot.

In the environmental test apparatus, a reflection mirror may be further provided in the test tank, and the imaging element may be configured to photograph the inside of the test tank through the reflection mirror.
Thereby, the range which becomes a blind spot from a camera unit can be image | photographed via a reflective mirror, and an imaging range can be expanded.

In the environmental test apparatus, at least two through holes are formed including through holes formed at positions facing each other on the wall of the test tank, and both ends of the double tube are formed at positions facing each other. The moving mechanism extends along the longitudinal direction of the double pipe and is movable or rotatable, or is movable and rotatable in the double pipe. It is preferable that the camera is fixed to the mounting member.
Thereby, the camera can move in the longitudinal direction through the mounting member in the double pipe inserted through the opposing through-holes provided in the opposing walls of the test tank, respectively, and / or the circumferential direction of the double pipe The whole inside of the test tank can be photographed.

In the environmental test apparatus, it is preferable that the camera has a lighting device.
Thereby, the inside of a test tank can be irradiated with an illuminating device, and it can image | photograph clearly with a camera.

It is a schematic perspective view which shows an example of the general environmental test apparatus which has a through-hole, (a) is the state which closed the door member, (b) is the state which opened the door member. It is sectional drawing which shows the camera unit which concerns on 1st embodiment. It is sectional drawing which shows the state which penetrates the camera unit shown in FIG. 2 in the through-hole of an environmental test apparatus. It is sectional drawing which shows the state which penetrates the camera unit shown in FIG. 2 through the through-hole of an environmental test apparatus, and image | photographs through a reflective mirror. It is sectional drawing which shows the state which penetrated the camera unit which concerns on 2nd embodiment through the through-hole of an environmental test apparatus.

  Hereinafter, an embodiment for carrying out an environmental test apparatus according to the present invention will be described with reference to a specific example. In addition, what is demonstrated below is only what was illustrated and does not show the application limit of the environmental test apparatus which concerns on this invention. In other words, the environmental test apparatus according to the present invention is not limited to the following embodiments, and various modifications can be made as long as they are described in the claims.

  First, an example of a general environmental test apparatus having a through hole will be described with reference to FIG.

  As shown in FIG. 1, a general environmental test apparatus 1 includes a test tank 3 that performs an environmental test at a predetermined temperature and a predetermined humidity, and a door member 2 that allows a test object to be taken in and out of the test tank 3. The test chamber 3 is covered with a wall made of a heat insulating material. The environmental test apparatus 1 includes a cooler, a heater, a humidifier, a blower, and the like (not shown), and can make the inside of the test tank 3 various environments.

  The environmental test apparatus 1 is opposed to the test tank 3 in order to pass various sensors installed in the test tank 3 and wirings (cables) connected to measuring devices installed outside the test tank 3. Cylindrical through-holes 5a and 5b for communicating the inside and the outside of the test chamber 3 are formed opposite to the side walls 4a and 4b.

  In the environmental test apparatus 1 shown in FIG. 1, the two through holes 5a and 5b are provided in the side walls 4a and 4b of the test tank 3. However, the present invention is not limited to this, and only one through hole is provided in one wall. It may be provided. Moreover, in the environmental test apparatus 1 shown in FIG. 1, although two through-holes 5a and 5b are provided facing both side walls 4a and 4b of the test tank 3, it is not restricted to this, and it is 2 on the wall which is not facing. One or two or more may be provided.

  Next, the camera unit according to the first embodiment will be described with reference to FIGS.

  As shown in FIG. 2, the camera unit 10 includes a double tube 11 including an outer tube 12 and an inner tube 13, a blower 14, a camera 15, a moving mechanism 17, and a heating element 18.

  The outer tube 12 and the inner tube 13 constituting the double tube 11 are formed of a resin (for example, polycarbonate) having excellent heat resistance and transparency. Each of the outer tube 12 and the inner tube 13 is formed so as to have a cylindrical shape in which one end of the cylindrical member is closed with a hemispherical member. The material of the outer tube 12 and the inner tube 13 may be any material as long as it has heat resistance and transparency, and may be glass.

  In the double pipe 11, the inner pipe 13 is arranged so that a gap is formed between the outer pipe 12 and the inner peripheral surface of the outer pipe 12. The double pipe 11 is provided with a support member (not shown) so as to contact the outer pipe 12 and the inner pipe 13 to maintain a gap and to form an air passage through which air sent from a blower 14 described later passes. Is done. The support member is preferably formed to have a thickness equivalent to the width of the desired gap and not to be included in the photographing range of the camera 15 to be described later. For example, the support member is formed only on the cylindrical member at a predetermined interval along the longitudinal direction of the double tube 11 in the outer tube 12 and the inner tube 13.

  A blower 14 is provided at the end of the gap formed by the outer pipe 12 and the inner pipe 13, and air is sent from the blower 14 to the inlet of the air flow path formed in the gap, and in the middle of the air flow path. Heat exchange with the heat transmitted from the test tank 3 is released from the outlet of the air flow path. Here, the speed of the air flow formed by the blower 14 is preferably changed according to the temperature in the test chamber 3. That is, it is preferable to change the speed of the air flow formed by the blower 14 in accordance with the magnitude of the difference between the temperature inside the test chamber 3 and the outside temperature. Further, depending on the temperature in the test chamber 3, it is not always necessary to send air by the blower 14. Note that the air may be normal temperature air outside the test chamber 3 or may not be normal temperature air as long as the temperature is such that the camera 15 can be protected. The blower 14 may flow a gas other than air. By sending the outside air into the gap between the outer tube 12 and the inner tube 13 with the blower 14, the temperature in the inner tube 13 is prevented from changing according to the temperature in the test tank 3, and the operation of the camera 15 to be described later It is possible to suppress the influence on the image and obtain a good image. Further, the outer tube 12 and the inner tube 13 may not be dewed by air blown by the blower 14.

  The camera 15 includes an image sensor 15 a and a lighting device 16, is arranged at one closed end in the inner tube 13, and photographs the inside of the test chamber 3 through the double tube 11. In the present embodiment of FIG. 2, the camera 15 is arranged such that the imaging element 15 a and the illumination device 16 are fixed to a hemispherical pedestal 15 b that lacks one closed end in the inner tube 13. The imaging element 15a is an element that stores light as an electrical signal, and a CCD element or the like is used. The illumination device 16 is a device that is arranged on both sides of the image sensor 15a and irradiates light to a test object imaged by the image sensor 15a, and an LED light or the like is used. Note that the illumination device 16 may not be disposed on both sides of the image sensor 15a, and may be provided in three or more. Further, the lighting device 16 may be provided separately from the pedestal 15b of the camera 15. Thereby, the inside of the test tank 3 can be irradiated with the illumination device 16 and can be clearly photographed with the camera 15.

  The moving mechanism 17 includes a rod-shaped member 17a and a hinge portion 17b connected to one end of the rod-shaped member on the camera 15 side. The other end of the rod-shaped member 17 a of the moving mechanism 17 is configured to extend to the outside of the double tube 11. The hinge portion 17b of the moving mechanism 17 is also fixed to the base 15b of the camera 15. The moving mechanism 17 operates the other end of the rod-shaped member 17a to move in the radial direction of the double tube 11 (the arrow direction in FIG. 2), so that the camera 15 can rotate via the hinge portion 17b. Composed. By operating the moving mechanism 17, the image sensor 15 a of the camera 15 rotates in the direction of the arrow shown in FIG. 2, and the test object can be photographed from various angles. You can shoot. The moving mechanism 17 is not limited to the configuration of the embodiment in FIG. 2, and may have any configuration as long as the direction of the camera 15 can be changed.

  The heating element 18 is a cord heater, for example, and is disposed along the outer peripheral surface of the outer tube 12. The heating element 18 is energized according to the environment in the test chamber 3, and prevents the outer tube 12 from being condensed or frozen due to the temperature and humidity in the test chamber 3. That is, due to the temperature difference between the temperature in the test chamber 3 and the double tube 11, the air in the vicinity of the outer tube 12 is cooled, and condensation or freezing occurs on the inner peripheral surface or outer peripheral surface of the outer tube 12. Therefore, by energizing the heating element 18 disposed on the outer peripheral surface of the outer tube 12 and heating the outer tube 12 so that it does not fall below the dew point temperature, it is possible to prevent the outer tube 12 from being condensed or frozen. Can do. Here, the dew point temperature indicates a temperature at which condensation starts when air containing water vapor is cooled. When the air temperature is 0 ° C. or less, the condensed water further solidifies or sublimates directly from the water vapor. The temperature that changes to ice, that is, the temperature that produces frost. Note that the heating element 18 may not be provided.

  Moreover, the environmental test apparatus 1 is provided with a plug 30 as shown in FIG. The plug body 30 is formed of an elastic body such as silicon rubber that can be easily attached and detached, and is a through hole provided in the walls 4a and 4b of the test tank 3 so that the inside of the test tank 3 is kept airtight. It is fitted in either 5a or 5b.

  The plug 30 is formed according to the size of the through holes 5a and 5b. For example, the plug 30 is formed in a tapered columnar shape so that the inner side of the test tank 3 has the same diameter as the through holes 5a and 5b, and the diameter gradually increases toward the outer side of the test tank 3. Further, a flange is provided at a portion of the plug body 30 placed outside the test tank 3, and the plug body 30 is locked to the through holes 5a and 5b when the flange contacts the walls 4a and 4b. Thereby, the plug 30 is inserted in close contact with the through holes 5a and 5b, and the airtightness can be improved. The plug body 30 is not limited to the shape shown in FIG. 3, and may have any shape as long as it can be inserted in close contact with the through holes 5 a and 5 b. Moreover, the plug 30 is formed of a heat insulating material.

  The plug body 30 is formed with a fitting hole 31 into which the double tube 11 of the camera unit 10 is fitted. The insertion hole 31 is formed in the same shape as the double tube 11 or a slightly smaller shape. The double pipe 11 can be inserted into the plug body 30 by being press-fitted into the insertion hole 31 to hold the double pipe 11. The insertion hole 31 may be a notch or may sandwich the double pipe 11.

  As described above, the configuration of the test tank 3 is the conventional one by inserting the double pipe 11 into the through holes 5a and 5b for drawing the wiring provided in the general environmental test apparatus 1 into the test tank 3. The camera unit 10 can be attached without being changed, and has versatility. Further, since external air does not enter the test tank 3, the inside of the test tank 3 and the external air are insulated, and the air tightness of the test tank 3 can be maintained, and the environmental test in the environmental test apparatus 1 is accurately performed. Can be done.

  Here, in the example of FIG. 3, the insertion hole 31 into which only the double tube 11 is fitted is provided in the plug body 30, but the present invention is not limited thereto. That is, the plug body 30 may further be provided with a notch for communicating the cable in addition to the insertion hole 31 so that both the double pipe 11 and the cable are communicated. Alternatively, the plug body 30 may be one in which both the double tube 11 and the cable communicate with the insertion hole 31.

  Further, as shown in FIG. 4, the reflecting mirror 8 may be suspended from the ceiling of the test tank 3 of the environmental test apparatus 1 at a predetermined angle with respect to the vertical direction. The predetermined angle is adjusted in advance so that a desired shooting range is reflected on the camera unit 10 inserted into either of the through holes 5a and 5b. Thereby, the range which becomes a blind spot can be image | photographed from the camera unit 10 via the reflective mirror 8, and the imaging | photography range can be expanded. Note that the reflecting mirror 8 does not have to be suspended from the ceiling, and can be installed at an arbitrary location.

  Next, a camera unit according to the second embodiment will be described with reference to FIG.

  As shown in FIG. 5, the camera unit 20 includes a double tube 21 including an outer tube 22 and an inner tube 23, a blower 24, a camera 25, and a moving mechanism 27.

  Similar to the camera unit 10 according to the first embodiment, the outer tube 22 and the inner tube 23 constituting the double tube 21 are formed of a resin (for example, polycarbonate) having excellent heat resistance and transparency. Each of the outer tube 22 and the inner tube 23 is a cylindrical member, and is formed to have a cylindrical shape with both ends opened. The material of the outer tube 22 and the inner tube 23 may be other materials or glass as long as it has heat resistance and transparency.

  In the double pipe 21, the inner pipe 23 is arranged so that a gap is formed between the outer pipe 22 and the inner peripheral surface of the outer pipe 22. The double pipe 21 is formed with a support member (not shown) that contacts the outer pipe 22 and the inner pipe 23 to maintain a gap. It is preferable that the support member has a thickness equivalent to the width of the desired gap and is formed in a position that is not included in the photographing range of photographing by the camera 25 described later in the outer tube 22 and the inner tube 22. For example, the support member is formed to such an extent that an air flow path sent from a blower 24 described later can be secured at both ends of a gap formed by the outer tube 22 and the inner tube 23.

  A blower 24 is provided at one end of the gap formed by the outer tube 22 and the inner tube 23, and air is sent from the blower 24 to the air flow path formed in the gap, and in the middle of the air flow path. Heat exchange with the heat transmitted from the test chamber 3 is released from the other end of the gap formed by the outer tube 22 and the inner tube 23. Here, the speed of the air flow formed by the blower 24 is preferably changed according to the temperature in the test chamber 3. That is, it is preferable to change the speed of the air flow formed by the blower 24 according to the magnitude of the difference between the temperature inside the test chamber 3 and the outside temperature. Further, depending on the temperature in the test chamber 3, it is not always necessary to send air by the blower 24. Note that the air may be room temperature air outside the test chamber 3 or may be room temperature air as long as the temperature is such that the camera 25 can be protected. The blower 24 may flow a gas other than air. By sending the outside air into the gap between the outer tube 22 and the inner tube 23 with the blower 24, the temperature in the inner tube 23 is prevented from changing according to the temperature in the test tank 3, and the operation of the camera 25 to be described later It is possible to suppress the influence on the image and obtain a good image. In addition, the outer tube 22 and the inner tube 23 may not be dewed by air blown by the blower 24.

  Although not shown, a heating element such as a code heater is disposed on the outer peripheral surface of the outer tube 22 in order to prevent the outer tube 11 from condensing or freezing due to the temperature and humidity in the test chamber 3. You may do it.

  The camera 25 includes an imaging device 25a and two illumination devices 26 provided on both sides of the imaging device 25a, and a moving mechanism 27 that is an attachment member (for example, a slide rail) described later disposed in the inner tube 23. It is attached and the inside of the test tank 3 is photographed through the double tube 21. The camera 25 is installed in the approximate center of the moving mechanism 27. When the moving mechanism 27 is a slide rail, the image sensor 25a and the illumination device 26 are fixed by being tightened in a groove of the slide rail by a fixing means such as a knurled screw. The imaging element 25a is an element that stores light as an electrical signal, and a CCD element or the like is used. The installation position of the camera 25 in the moving mechanism 27 is not limited to the approximate center, and may be installed at a desired position where the test object can be photographed. Two illumination devices 26 are arranged on both sides of the image sensor 25a to irradiate light to a test object photographed by the image sensor 25a, and an LED light or the like is used. Thereby, the inside of the test tank 3 can be irradiated with the illumination device 26 and can be clearly photographed with the camera 25. In the present embodiment shown in FIG. 5, two illumination devices 26 are arranged. However, the present invention is not limited to this, and only one may be arranged, or three or more may be arranged. good. Further, the lighting device 26 may be provided separately from the moving mechanism 27 of the camera 25.

  The moving mechanism 27 is formed by an attachment member such as a slide rail. The moving mechanism 27 is configured to be longer than the double tube 21 so as to extend to the outside of the double tube 21 and is close to the inner diameter of the inner tube 23 so as to rotate around the center of the inner tube 23. Composed of width. The moving mechanism 27 operates the end to move (slide) the camera 25 in the axial direction (longitudinal direction) in the inner tube 23 and move (rotate) the camera 25 in the circumferential direction in the inner tube 23. Configured to be able to. By operating the moving mechanism 27, the image sensor 25a of the camera 25 slides and rotates in the direction of the arrow shown in FIG. 5, and the test object can be photographed from various positions and various angles. A wide range of the whole can be photographed. The moving mechanism 27 is not limited to the configuration of the embodiment of FIG. 2, and may be any configuration as long as the camera 25 can be moved in the axial direction and the circumferential direction within the double tube 21. A plurality of cameras 25 may be attached to the moving mechanism 27. Here, when a plurality of cameras 25 are attached, the orientations of the cameras may be different. The moving mechanism 27 may be movable only in the circumferential direction or only in the axial direction. Furthermore, the attachment member which is the moving mechanism 27 may be a plate or a film.

  The double pipe 21 is inserted through each of the through holes 5a and 5b provided in the walls 4a and 4b of the test tank 3 from one to the other. Here, the through holes 5a and 5b are fitted with plugs 30 (see FIG. 3) formed of an elastic material such as silicon rubber having heat insulation properties, and the inside of the test tank 3 is kept airtight. The plug body 30 is formed with a fitting hole 31 into which the double tube 21 of the camera unit 20 is fitted. The insertion hole 31 is formed in the same shape as the double tube 21 or a slightly smaller shape. The double pipe 21 is press-fitted into the insertion hole 31 and inserted into the plug body 30, and the double pipe 21 can be held. The insertion hole 31 may be a notch or may sandwich the double tube 21. In addition, the structure of the other plug body 30 is as above-mentioned, and abbreviate | omits description.

  As described above, the configuration of the test tank 3 is the conventional one by inserting the double pipe 21 into the through holes 5a and 5b for drawing the wiring provided in the general environmental test apparatus 1 into the test tank 3. The camera unit 20 can be attached without being changed, and has versatility. In addition, since the outside air does not enter the test tank 3, the air tightness of the test tank 3 can be maintained, the inside of the test tank 3 and the outside air are insulated, and the environmental test in the environmental test apparatus 1 is accurately performed. Can be done.

  Here, in the example of FIG. 5, the insertion hole 31 into which only the double tube 21 is fitted is provided in the plug body 30, but the present invention is not limited thereto. That is, the plug body 30 may further be provided with a notch for communicating the cable in addition to the insertion hole 31 so that both the double pipe 21 and the cable are communicated. Alternatively, the plug 30 may connect both the double pipe 21 and the cable to the insertion hole 31. Furthermore, you may install a reflective mirror in the test tank 3 with respect to the camera unit 20 which concerns on 2nd embodiment shown in FIG.

  Note that a plurality of camera units 10 according to the first embodiment and a plurality of camera units 20 according to the second embodiment may be arranged for the environmental test apparatus 1, and further, the camera according to the first embodiment. The unit 10 and the camera unit 20 according to the second embodiment may be mixed and arranged.

DESCRIPTION OF SYMBOLS 1 Environmental test apparatus 3 Test tank 5a, 5b Through-hole 10,20 Camera unit 11,21 Double tube 12,22 Outer tube 13,23 Inner tube 15,25 Camera 15a, 25a Image pick-up element 16,26 Illumination device 17,27 Movement mechanism 18 Heating element 30 Plug body 31 Insertion hole

Claims (7)

Provided with a test chamber in which a DUT is disposed and a through-hole that communicates the inside and the outside is formed. An environmental test device to perform,
A double pipe composed of a transparent outer pipe and a transparent inner pipe disposed in the outer pipe so that a gap is formed between the transparent outer pipe and the inner peripheral surface of the outer pipe;
A blower that sends gas into the gap between the outer tube and the inner tube;
A camera having an image sensor disposed in the inner tube and photographing the inside of the test tank through the double tube;
A moving unit for moving the camera, and a camera unit comprising:
An environmental test apparatus, wherein the double tube is inserted through the through hole.   The environmental test apparatus according to claim 1, further comprising a heating element disposed on an outer peripheral surface of the outer tube.   3. The plug according to claim 1, further comprising: a plug body that is fitted into the through-hole so that an insertion hole into which the double pipe is fitted is formed and the inside of the test tank is kept airtight. The environmental test apparatus described. The double tube has a cylindrical shape with one end closed, and the one end is inserted through the through hole so as to face the test chamber.
The camera is disposed at the one end in the double tube;
The environmental test apparatus according to claim 1, wherein the moving mechanism is capable of changing a direction of the camera so that a shooting direction of the imaging element is changed. Further comprising a reflector in the test chamber,
5. The environmental test apparatus according to claim 1, wherein the image pickup device photographs the inside of the test tank through the reflecting mirror. At least two through holes are formed including through holes formed at positions facing each other on the wall of the test chamber,
Both ends of the double pipe are respectively inserted through the through holes formed at opposing positions,
The moving mechanism includes an attachment member that extends along the longitudinal direction of the double pipe and is movable or rotatable in the double pipe, or is arranged to be movable and rotatable.
The environmental test apparatus according to claim 1, wherein the camera is fixed to the mounting member.   The environmental test apparatus according to claim 1, wherein the camera includes a lighting device.

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