JP2020041807A - Environmental test device - Google Patents

Abstract

To provide an environmental test device which enables more accurate check on change in shape of a body to be tested during a test.SOLUTION: An environmental test device comprises a test chamber and a displacement measurement mechanism. In the environmental test device, the test chamber in which a body to be tested is housed is provided with a window for observing the body to be tested from outside the test chamber. The displacement measurement mechanism disposed such as to face the window measures three-dimensional coordinate displacement of a predetermined measuring point in the body to be tested.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an environmental test device.

  Conventionally, as described in Patent Literature 1, a measuring device for performing various tests in an environment where the temperature is controlled is known. The measuring device described in Patent Literature 1 includes a test tank that accommodates a test object and has a transparent window provided in a part of a wall, and an optical measuring device that is arranged outside the test tank. Have. According to this measuring device, for example, when a tensile test or the like is performed, a change in shape of the test object can be measured from outside the test tank by an optical measuring device.

Japanese Patent No. 5492945

  In the measuring device described in Patent Document 1, while the shape change of the DUT during the test can be measured by the optical measuring device, the information obtained thereby is limited, and the change in the shape of the DUT is measured. There is a problem that it is difficult to confirm accurately.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an environmental test apparatus capable of more accurately confirming a shape change of a test object during a test.

  An environmental test apparatus according to one aspect of the present invention is a test tank that stores a test object, wherein the test tank is provided with a window for observing the test object from outside the test tank, A displacement measuring mechanism arranged to face the window and measuring a displacement of a predetermined measurement point in the three-dimensional coordinates on the test object.

  According to this environmental test apparatus, it is possible to confirm the shape change of the test object during the test as follows. First, a mark indicating a predetermined measurement point is attached to the test object, and the test object is accommodated in the test tank. Then, the displacement of the three-dimensional coordinates of the measurement point, which moves due to changes in various environmental factors (for example, the temperature in the test chamber) and test conditions, can be measured by the displacement measurement mechanism. This makes it possible to confirm the three-dimensional change in the shape of the DUT during the test, so that the change in the shape of the DUT can be checked more accurately.

  In the environmental test apparatus, the displacement measurement mechanism is based on an image acquisition unit that acquires an image of the test object housed in the test tank and an image of the test object that is acquired by the image acquisition unit. And an image processing unit that acquires a displacement amount of the three-dimensional coordinates of the measurement point.

  According to this configuration, since the displacement amount of the three-dimensional coordinates of the measurement point can be obtained based on the image of the test object acquired during the test, the three-dimensional The change in shape can be confirmed.

  The environmental test apparatus may further include a mounting mechanism for mounting the image acquisition unit outside the test tank. The image acquisition unit may be attached by the attachment mechanism so as to be slidable along the window.

  According to this configuration, the position of the image acquisition unit can be easily adjusted according to the position of the device under test in the test tank. Moreover, by attaching the image acquisition unit outside the test tank, it is possible to prevent the image acquisition unit from being exposed to the environment (for example, temperature and humidity) in the test tank and causing a failure.

  In the environmental test apparatus, the image acquisition unit may be attached by the attachment mechanism so that an angle with respect to the window can be adjusted.

  According to this configuration, it is possible to easily capture images of the test object housed in the test tank from various angles.

  In the above-mentioned environmental test apparatus, a plurality of the image acquisition units may be provided so that images of the test object can be acquired from multiple directions.

  According to this configuration, the displacement of the three-dimensional coordinates of the measurement point during the test can be measured with higher accuracy.

  The environmental test apparatus includes an in-bath temperature detecting unit that detects a temperature in the test tank, a temperature detected by the in-bath temperature detecting unit at a predetermined timing during a test, and the displacement measurement at the predetermined timing. The display unit may further include a display unit that displays the displacement of the three-dimensional coordinates of the measurement point measured by a mechanism in synchronization with each other.

  According to this configuration, since the temperature in the test chamber and the displacement of the three-dimensional coordinates of the measurement point during the test can be correlated with each other, it is necessary to analyze the shape change of the DUT due to the influence of the temperature in the test chamber. Becomes possible.

  The environmental test apparatus includes: a test object temperature detecting unit that detects a temperature of the test object; a temperature detected by the test object temperature detecting unit at a predetermined timing during a test; and the displacement measurement at the predetermined timing. The display unit may further include a display unit that displays the displacement of the three-dimensional coordinates of the measurement point measured by a mechanism in synchronization with each other.

  According to this configuration, since the temperature of the test object and the displacement of the three-dimensional coordinates of the measurement point during the test can be correlated with each other, it is possible to analyze the shape change of the test object due to the influence of the temperature of the test object. Becomes possible.

  The environmental test apparatus may be an apparatus for performing a charge / discharge test of the device under test, which is a secondary battery. The environmental test apparatus is configured to determine a charge / discharge amount of the test object at a predetermined timing during a test and a displacement of the three-dimensional coordinates of the measurement point measured by the displacement measurement mechanism at the predetermined timing. And a display unit for displaying in synchronization.

  According to this configuration, since the charge / discharge amount of the test object and the displacement of the three-dimensional coordinates of the measurement point during the test can be associated with each other, it is possible to analyze the shape change of the test object due to the influence of the charge / discharge amount. Becomes possible.

  As is apparent from the above description, according to the present invention, it is possible to provide an environmental test apparatus capable of more accurately confirming a change in the shape of a test object during a test.

It is a perspective view showing typically composition of an environmental testing device concerning Embodiment 1 of the present invention. It is a figure showing typically the inside of the environmental testing device concerning Embodiment 1 of the present invention. 5 is a graph illustrating an example of a measurement result displayed on a display unit of the environmental test device according to the first embodiment of the present invention. FIG. 4 is an enlarged view of a region IV in FIG. 1. FIG. 5 is an enlarged view of a region V in FIG. 1. FIG. 6 is an enlarged view of a region VI in FIG. 1. It is a side view which shows the structure of a bracket. FIG. 9 is a schematic diagram for explaining adjustment of an angle formed by an image acquisition unit with respect to a window. FIG. 9 is a schematic diagram for explaining adjustment of an angle formed by an image acquisition unit with respect to a window. It is a schematic diagram for explaining the configuration of the environmental test apparatus according to the second embodiment of the present invention.

  Hereinafter, an environmental test apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
First, the configuration of the environmental test apparatus 1 according to the first embodiment of the present invention will be described with reference to FIGS. The environmental test apparatus 1 is a constant-temperature and constant-humidity apparatus that operates under a preset temperature and humidity condition for a set time. As shown in FIGS. 1 and 2, the environmental test apparatus 1 includes a test tank 10, an air conditioning unit 20, a tank temperature detection unit 31, a tank humidity detection unit 32, a subject temperature detection unit 33, It mainly includes a control unit 40, a displacement measurement mechanism 50, a display unit 60, and a mounting mechanism 70.

  FIGS. 1 and 2 show only main components of the environmental test apparatus 1, and the environmental test apparatus 1 can include other components not shown in both the drawings. FIG. 2 shows a state in which the air conditioner 20 is disposed below the test tank 10. However, the present invention is not limited to this, and the air conditioner 20 may be disposed at any position in the test tank 10. Good. For example, the air-conditioning unit 20 may be arranged at any of the upper, side, and rear positions in the test tank 10. The air conditioning unit 20 is not limited to the case where the air conditioner is arranged in the test tank 10, and may be configured separately from the test tank 10, and may be arranged outside the test tank 10. The “horizontal direction (X direction)”, “vertical direction (Y direction)”, and “front-rear direction (Z direction)” are based on the directions shown in FIG. Hereinafter, each component in the environmental test apparatus 1 will be described in detail.

  The test tank 10 is a rectangular parallelepiped chamber that accommodates the test object S1. As shown in FIG. 1, a test tank 10 is rotated with respect to a tank main body 11 in which a device under test is accommodated, and an opening provided in front of the tank main body 11 can be opened and closed. And a door 12 that is freely mounted. As shown in FIG. 2, a plurality of shelves 13 are horizontally installed in the tank body 11, and the test object S <b> 1 is fixed on the shelves 13.

  As shown in FIG. 1, the door 12 is provided with a window portion 17 made of transparent glass having a rectangular shape in a front view, and a rectangular frame portion 18 surrounding the window portion 17 in a front view. The frame 18 projects forward from the window 17 and is provided with a handle (not shown) for gripping when the door 12 is opened and closed. In addition, a window 17 and a frame 18 surrounding the window 17 are similarly provided on both left and right side surfaces and the upper surface of the tank body 11. Through these windows 17, the test object S1 accommodated in the test tank 10 can be observed from outside the test tank 10.

  When the air-conditioning unit 20 is located above, to the side, or behind the test tank 10 as described above, the surface of the test tank 10 where the air-conditioning unit 20 is located (adjacent) is the test object. The window 17 for observing S1 is omitted. When the air conditioning unit 20 is not provided below the test tank 10, a window 17 for observing the test object S <b> 1 may be provided on the lower surface of the test tank 10.

  The air conditioner 20 controls the temperature and humidity in the test tank 10 and includes, for example, devices such as an evaporator (cooler) and a fan that constitute a refrigeration circuit. As shown in FIG. 2, a space in the test tank 10 (tank main body 11) is divided by a partition wall 19 into a test room 10 </ b> A in which the device under test S <b> 1 is stored and an air-conditioning room 10 </ b> B in which the air-conditioning unit 20 is arranged. It is partitioned. Air is sucked into the air conditioning room 10B from the test room 10A, and air whose temperature and humidity are adjusted by the air conditioning unit 20 is blown out to the test room 10A. The positions of the air outlet and the air inlet are not particularly limited.

  The in-bath temperature detecting unit 31 is a sensor that detects the temperature in the test bath 10, and is arranged at an air outlet of the test chamber 10A as shown in FIG. The in-tank humidity detector 32 is a sensor for detecting the humidity in the test tank 10, and is disposed at the air outlet of the test chamber 10 </ b> A, like the in-tank temperature detector 31. It should be noted that the in-bath temperature detecting section 31 and the in-bath humidity detecting section 32 are not limited to being arranged at the positions shown in FIG. 2, and may be arranged at arbitrary positions in the test tank 10.

  Each data acquired by the in-bath temperature detecting unit 31 and the in-bath humidity detecting unit 32 is transmitted to the control unit 40. Then, based on the data transmitted from the in-chamber temperature detection unit 31 and the in-chamber humidity detection unit 32, the control unit 40 controls the air-conditioning unit so that the temperature and humidity in the test tank 10 approach the set temperature and the set humidity, respectively. 20 is controlled.

  The test object temperature detection unit 33 is a sensor that detects the temperature of the test object S1, and is used in a state attached to the test object S1 as shown in FIG. In addition, the test object temperature detection part 33 is not limited to what is attached to the test object S1, and may detect the temperature of the test object S1 in a non-contact state.

  The displacement measuring mechanism 50 measures the displacement of the predetermined measurement point P1 (FIG. 2) in the three-dimensional coordinates (XYZ coordinates) on the test object S1. During the environmental test, the temperature of the test object S1 depends on various environmental factors (for example, the temperature and humidity in the test tank 10), the stress applied to the test object S1, or the temperature change due to the energization of the test object S1. The shape may change. On the other hand, by following each displacement of the measurement point P1 in the XYZ directions using the displacement measuring mechanism 50, it is possible to accurately confirm the shape change of the test object S1 during the environmental test.

  As shown in FIG. 1, the displacement measurement mechanism 50 includes an image acquisition unit 51 that acquires an image of the device under test S1 housed in the test tank 10, and an image that processes the image acquired by the image acquisition unit 51. And a processing unit 54.

  The image acquisition unit 51 includes a pair of cameras 51 </ b> A (stereo cameras) spaced apart from each other, and is arranged outside the test tank 10 so as to face the window 17 of the door 12. Each of the cameras 51A is arranged with a lens unit (not shown) facing the window 17 and separated from the window 17 (non-contact with the window 17). The image acquisition unit 51 captures an image of the test object S1 including three-dimensional coordinate information of the measurement point P1 at predetermined time intervals based on a triangulation method using a pair of cameras 51A.

  The image processing unit 54 is a computer communicably connected to the image acquisition unit 51, and transmits the image data of the test object S1 acquired by the image acquisition unit 51. The image processing unit 54 calculates the displacement of the three-dimensional coordinates of the measurement point P1 based on the image of the test object S1 acquired by the image acquisition unit 51 using a digital image correlation method (DIC; Digital Image Correlation). get. Specifically, the image processing unit 54 obtains an image (reference image) of the device under test S1 obtained by the image obtaining unit 51 at the start of the test, and obtains the image at a predetermined time interval by the image obtaining unit 51 during the test. The image of the test object S1 is compared with the image, and the three-dimensional coordinates of the measurement point P1 at each point in the test are acquired based on the comparison. In this way, it is possible to grasp a change in the three-dimensional coordinates of the measurement point P1 during the test.

  The display unit 60 is a display that displays a measurement result by the displacement measurement mechanism 50, a detection result by the in-chamber temperature detection unit 31, and a detection result by the subject temperature detection unit 33, respectively, and is connected to a computer constituting the image processing unit 54. Have been. The display unit 60 displays the three-dimensional coordinates of the temperature detected by the in-chamber temperature detecting unit 31 at a predetermined timing during the test (in-bath temperature) and the measurement point P1 measured by the displacement measuring mechanism 50 at the predetermined timing. And are displayed in synchronization with each other. In addition, the display unit 60 displays a three-dimensional display of the temperature (the subject temperature) detected by the subject temperature detection unit 33 at a predetermined timing during the test and the measurement point P1 measured by the displacement measurement mechanism 50 at the predetermined timing. And the coordinate displacement are displayed in synchronization with each other. In addition, the display unit 60 is not limited to a display in which both the in-bath temperature and the subject temperature are displayed in synchronization with the displacement of the three-dimensional coordinates of the measurement point P1, and any one of the in-bath temperature and the subject temperature is used. Only the display may be displayed in synchronization with the displacement of the three-dimensional coordinates of the measurement point P1.

  FIG. 3 is a graph showing an example of the measurement data displayed on the display unit 60. In the graph of FIG. 3, the horizontal axis indicates the elapsed time during the test, and the vertical axis indicates each measurement data (the displacement of the measurement point P1 in the XYZ directions, the temperature in the chamber, and the temperature of the subject). Each curve in the graph is (1) the X coordinate of the measurement point P1, (2) the Y coordinate of the measurement point P1, (3) the Z coordinate of the measurement point P1, (4) the temperature in the chamber, and (5) the temperature of the subject. Are respectively shown. Note that the XYZ coordinates of the measurement point P1 indicate the start time of the test as the origin 0.

  As shown in FIG. 3, according to the environmental test apparatus 1 according to the present embodiment, the data (1) to (3) of the XYZ coordinates of the measurement point P1 on the test object S1 are converted into the data (4) of the temperature in the chamber. And it can be displayed in synchronization with the subject temperature data (5). That is, the XYZ coordinates (X1, Y1, Z1 in FIG. 3) of the measurement point P1 at an arbitrary time point t1 during the test, the temperature in the chamber (T1 in FIG. 3) and the test object temperature (FIG. T2) can be displayed in association with each other.

  The attachment mechanism 70 is for attaching the image acquisition unit 51 to the test tank 10 outside the test tank 10. As shown in FIG. 1, the mounting mechanism 70 includes a vertical shaft 71 extending in the vertical direction (Y direction), a pair of flat shaft mounting plates 72, and a horizontal shaft (X direction) with respect to the vertical shaft 71. A slide rail 73 extending in the vertical direction at the closed position, a slide rail mounting plate 74 having an L-shape, a clamp 75, a slider 76, a horizontal shaft 77 extending in a horizontal direction, and a camera mount 78 are mainly provided. Have.

  As shown in FIG. 1, the pair of shaft mounting plates 72 are fixed to the left upper surface and the left lower surface of the door 12, respectively, and protrude forward from the door 12. A vertical shaft 71 is bridged between the projecting portions.

  The slide rail mounting plate 74 has one plate 74A fixed to the upper surface on the right side of the door 12 and the other plate 74B hanging down from the front end of the one plate 74A. As shown in FIG. 1, the upper end of the slide rail 73 is fixed to the other plate piece 74B of the slide rail mounting plate 74.

  FIG. 4 is an enlarged view of a region IV in FIG. 1 and shows the configuration of the clamp 75 in detail. As shown in FIG. 4, the clamp 75 is a block body in which a vertical hole 75A penetrating in the vertical direction and a horizontal hole 75B penetrating in the horizontal direction are formed. The vertical shaft 71 is inserted into the vertical hole 75A, and the horizontal shaft 77 is inserted into the horizontal hole 75B. By sliding the clamp 75 up and down along the vertical shaft 71, the horizontal shaft 77 can be moved in the vertical direction while being perpendicular to the vertical shaft 71.

  As shown in FIG. 4, the clamp 75 has an opening 75 </ b> AA that opens the vertical hole 75 </ b> A forward, and a fixing hole 75 </ b> AB extending in the horizontal direction across the opening 75 </ b> AA. . The vertical position of the clamp 75 with respect to the vertical shaft 71 can be fixed by inserting and fixing a fixing member such as a screw into the fixing hole 75AB.

  FIG. 5 is an enlarged view of a region V in FIG. 1 and shows a configuration of the slider 76 attached to the slide rail 73. The slider 76 has, for example, a rectangular parallelepiped shape, and is slidable along the longitudinal direction (vertical direction) of the slide rail 73 while being engaged with grooves (not shown) provided on both side surfaces of the slide rail 73. I have.

  As shown in FIG. 5, one plate piece 79A of a mounting plate 79 having an L-shape is fixed to the front surface of the slider 76 (the surface opposite to the back surface mounted on the slide rail 73), and the other is fixed. A through hole 79BB is formed in the plate piece 79B (a plate piece perpendicular to the one plate piece 79A). One end of the horizontal shaft 77 (the end opposite to the end inserted into the horizontal hole 75B of the clamp 75) is inserted into the through hole 79BB. That is, the horizontal shaft 77 is bridged between the clamp 75 and the mounting plate 79 along the horizontal direction. The vertical position of the horizontal shaft 77 can be adjusted by sliding the clamp 75 and the slider 76 in the vertical direction. After that, the vertical position of the horizontal shaft 77 can be fixed by tightening the clamp 75 with a fixing member (not shown) such as a screw inserted into the fixing hole 75AB (FIG. 4) of the clamp 75 as described above. it can.

  FIG. 6 is an enlarged view of the area VI in FIG. 1 and shows the configuration of the camera mount 78 in detail. As shown in FIG. 6, the camera mount 78 is a rectangular parallelepiped block, and has a horizontal hole 78A that penetrates in the horizontal direction and opens in one direction (front). The horizontal shaft 77 is inserted into the horizontal hole 78A, and the camera mount 78 is slidable along the horizontal shaft 77 in the horizontal direction. Further, the camera mount portion 78 is formed with two fixing holes 78C penetrating vertically in the opening portion 78AA of the horizontal hole 78A. A bolt or the like is inserted into the fixing hole 78C, and the position of the camera mount portion 78 is changed. Can be fixed.

  FIG. 7 shows a configuration when the camera mount 78 is viewed from the side from the direction indicated by the arrow VII in FIG. As shown in FIG. 7, a bracket 81 having a U-shape in a side view is fixed to the upper surface 78B of the camera mount 78. The bracket 81 includes a lower bracket piece 81A having a lower surface 81AA fixed to the upper surface 78B of the camera mount 78, an upper bracket piece 81B opposed to the lower bracket piece 81A with a space, and an upper bracket piece 81B. And a connection bracket 81C that connects the ends of the lower bracket 81A and is perpendicular to the upper bracket 81B and the lower bracket 81A.

  The bracket 81 is fixed to the camera mount 78 by a fixing member (not shown) such as a screw with the lower surface 81AA in contact with the upper surface 78B. As shown in FIG. 1, the image acquisition unit 51 is arranged on a camera mount 78 via a bracket 81. That is, the image acquisition unit 51 is mounted on the upper surface 81BB (FIG. 7) of the upper bracket piece 81B.

  According to the above configuration, the image acquisition unit 51 can be slid up and down along the window 17 of the door 12 by sliding the clamp 75 and the slider 76, and the camera mount 78 can be moved to the horizontal shaft 77. , The image acquisition unit 51 can be slid in the horizontal direction along the window 17 of the door 12. Thereby, the position of the image acquisition unit 51 (camera 51A) can be appropriately adjusted according to the position of the test object S1 in the test tank 10.

  The image acquisition unit 51 is attached by an attachment mechanism 70 so that the angle θ with respect to the window 17 can be adjusted. 8 and 9 show the configuration when the camera mount 78 is viewed from the side along the direction in which the horizontal shaft 77 extends. FIG. 9 shows the camera mount 78 in the state of FIG. Shows a state when it is rotated by a predetermined angle as indicated by an arrow R1 around the arrow. As described above, by rotating the camera mount portion 78 around the horizontal shaft 77, the angle θ formed by the camera 51A with respect to the outer surface 17A of the window portion 17 (a straight line extending from the lens portion of the camera 51A toward the window portion 17). The angle (θ) between L1 and the outer surface 17A can be changed, and the direction (angle) of the camera 51A can be adjusted.

  Next, an example of displacement measurement of the measurement point P1 during a test (for example, an energization test) using the environmental test apparatus 1 will be described.

  First, a mark or a mark indicating the measurement point P1 is provided on the test object S1, and the test object S1 is fixed on the shelf 13 in the test tank 10 (FIG. 2). Then, the set values of the in-chamber temperature and the in-chamber humidity are input to start the operation of the test tank 10 and to start the energization test. At the same time as the start of the test, the image acquisition unit 51 (camera 51A) also starts acquiring an image of the test object S1.

  During the test, as shown in the graph of FIG. 3, the change over time of the XYZ coordinates (1) to (3) of the measurement point P1, the temperature in the chamber (4), and the temperature of the test subject (5) are displayed on the display unit 60. Can be confirmed. Therefore, it is possible to three-dimensionally confirm the shape change of the test object S1 during the test. Moreover, by displaying the XYZ coordinates of the measurement point P1 in association with the in-chamber temperature and the subject temperature, it is possible to analyze in detail the shape change of the test object S1 due to the influence of the in-chamber temperature and the subject temperature. become.

(Embodiment 2)
Next, an environmental test apparatus 2 according to a second embodiment of the present invention will be described with reference to FIG. The environmental test device 2 according to the second embodiment basically has the same configuration as the environmental test device 1 according to the first embodiment, and has the same effect. However, the environmental test apparatus 1 according to the first embodiment includes only one image acquisition unit 51 arranged so as to face the door 12, whereas the environmental test apparatus 2 according to the second embodiment includes The environmental test apparatus 1 according to the first embodiment is different from the environmental test apparatus 1 according to the first embodiment in that Hereinafter, only differences from the first embodiment will be described.

  FIG. 10 shows a configuration near the upper surface of the environmental test device 2 according to the second embodiment. The environmental test apparatus 2 includes, in addition to one image acquisition unit 51 (the image acquisition unit 51 described in the first embodiment, FIG. 1) arranged to face the window 17 of the door 12, the upper surface of the tank body 11. Further, another image acquisition unit 51 (upper surface image acquisition unit 51) is provided so as to face the window unit 17 provided in the camera. The environmental test apparatus 2 further includes an upper surface side mounting mechanism 90 for mounting the upper surface side image acquisition unit 51 so as to be slidable along the window 17 outside the test tank 10. In FIG. 10, the upper surface side image acquisition unit 51 is drawn in a rectangular parallelepiped shape for simplification of the drawing, but the upper surface side image acquisition unit 51 is arranged so as to face the window 17 of the door 12. It has a configuration similar to that of the image acquisition unit 51 (door-side image acquisition unit).

  As shown in FIG. 10, the upper surface-side mounting mechanism 90 includes a first shaft 92 extending in the front-rear direction (Z direction), and a slide rail extending in the front-rear direction at a position horizontally separated from the first shaft 92. 95, a second shaft 94 bridged between the first shaft 92 and the slide rail 95, a pair of L-shaped shaft mounting plates 91, a clamp 93, and a slider 96. are doing.

  The pair of shaft mounting plates 91 are fixed to the frame portion 18 in front of the window portion 17 and the frame portion 18 in back of the window portion 17, respectively. As shown in FIG. 10, in each shaft mounting plate 91, one plate is fixed to the frame portion 18 and the other plate (a plate perpendicular to the one plate) extends upward. . Then, the first shaft 92 is bridged between the pair of shaft mounting plates 91 by inserting both ends of the first shaft 92 into the holes formed in the other plate piece.

  As shown in FIG. 10, the slide rail 95 is attached to the frame 18 on the right side of the window 17. The slider 96 is a rectangular parallelepiped block, and is slidable in the front-rear direction along the slide rail 95.

  The clamp 93 is a block body having a hole into which the first shaft 92 is inserted and a hole into which the second shaft 94 is inserted, and is slidable in the front-back direction along the first shaft 92. The end of the horizontal shaft 94 opposite to the end inserted into the clamp 93 is attached to the slider 96.

  A camera mount (not shown) slidable in the horizontal direction is attached to the second shaft 94, and the upper image acquisition unit 51 is mounted on the camera mount. Therefore, by sliding the second shaft 94 in the front-rear direction, the position of the upper image acquisition unit 51 in the front-rear direction is adjusted, and by sliding the camera mount unit in the horizontal direction along the second shaft 94, the upper surface is obtained. The horizontal position of the side image acquisition unit 51 can be adjusted. The upper surface side image acquisition unit 51 is configured to acquire an image of the test object S1 at the same timing as the door side image acquisition unit 51 (FIG. 1) arranged so as to face the window 17 of the door 12. ing.

  As described above, according to the environmental test apparatus 2 according to the second embodiment, by providing the plurality of image acquisition units 51 (the door-side image acquisition unit and the top-side image acquisition unit), it is possible to cover the image from multiple directions (forward and upward). An image of the test object S1 can be obtained. Therefore, an image of the test object S1 housed in the test tank 10 can be taken from a desired direction. In addition, by using a plurality of image acquisition units 51 in combination, it is possible to reduce the error of displacement measurement as compared with the environmental test apparatus 1 according to the first embodiment.

(Embodiment 3)
Next, an environmental test apparatus according to Embodiment 3 of the present invention will be described. The environmental test apparatus according to the third embodiment basically has the same configuration as the environmental test apparatus 1 according to the first embodiment and has the same effect, but measures the charge / discharge amount of the test object S1. This is different from the environmental test apparatus 1 according to the first embodiment in that the displacement of the three-dimensional coordinates of the point P1 is displayed in synchronization with each other. Hereinafter, only differences from the first embodiment will be described.

  The environmental test device according to the third embodiment is a device for performing a charge / discharge test of a test object S1 that is a secondary battery (for example, a lithium ion battery). The display unit 60 according to the third embodiment displays the charge / discharge amount of the test object S1 at a predetermined timing during the test and the three-dimensional coordinates of the measurement point P1 measured by the displacement measurement mechanism 50 at the predetermined timing. And are displayed in synchronization with each other. Accordingly, the charge / discharge amount of the test object S1 and the displacement of the three-dimensional coordinates of the measurement point P1 during the test can be associated with each other. Becomes possible. Note that, in addition to the charge / discharge amount of the test object S1, at least one of the tank temperature and the test object temperature may be displayed in synchronization with the displacement of the three-dimensional coordinates of the measurement point P1.

(Other embodiments)
Finally, other embodiments of the present invention will be described.

  The case where one image acquisition unit 51 is attached is not limited to the case where the image acquisition unit 51 is attached so as to face the window 17 of the door 12, and may be attached so as to face the window 17 provided on the upper surface of the tank body 11. Alternatively, it may be attached so as to face a window 17 provided on one of the left and right side surfaces of the test tank 11.

  When a plurality of image acquisition units 51 are attached, the image acquisition unit 51 is attached to both left and right sides of the tank main body 11 and an attachment mechanism that attaches the image acquisition units 51 so as to be slidable along the window 17 is provided. It may be attached to both left and right sides of the tank body 11.

  A rotating body (for example, a propeller of a fan, a disc brake of an automobile, or the like) may be used as the test object.

  The present invention is not limited to the case where a plurality of windows 17 are provided in the test tank 10, and only one window 17 may be provided. In this case, the window 17 may be provided on any of the door 12, the upper surface of the tank body 11, the right side of the tank body 11, and the left side of the tank body 11.

  As described above, when the air-conditioning unit 20 is configured separately from the test tank 10, observation windows are provided on up to six surfaces (front, rear, top, bottom, left, and right) of the test tank 10. 17 may be provided, and the image acquisition unit 51 may be attachable so as to face each window 17. When the temperature change in the test tank 10 is large, not only the shape change of the test object S1 but also the shape change of the glass or the exterior of the shelf 13, the inner tank, and the window 17 are considered to occur at the same time. On the other hand, by attaching the image acquisition units 51 to a maximum of six surfaces in the test tank 10, it is possible to acquire data necessary for calculating the true displacement amount of the test object S1 by correction.

  In the above embodiment, the case where the shape of the test tank 10 is a hexahedron has been described. However, the shape is not limited to this, and an arbitrary polyhedral shape may be used. In this case, the observation window 17 may be provided on all surfaces of the polyhedron, and the image acquisition unit 51 facing the window 17 may be attached.

  The image acquisition unit 51 is not limited to the case where the image acquisition unit 51 is attached to the test tank 10. For example, the image acquisition unit 51 may be attached to a support installed near the test tank 10.

  The test performed by the environmental test devices 1 and 2 is not limited to the current test. For example, a temperature test or a temperature / humidity test that does not energize the test object S1 may be performed, and a test for applying a stress to the test object S1 such as a tensile test may be performed. That is, the environmental test devices 1 and 2 can be used to measure the displacement of the test object S1 in various tests. When a test for applying a stress to the test object S1 is performed, the environmental test devices 1 and 2 include a stress applying device (not shown) for applying a stress to the test object S1 in addition to the test tank 10. Is further provided.

  Further, the environmental test device is not limited to a constant temperature and humidity device. For example, the present invention can be applied to a device that can adjust the inside of a closed space to a predetermined environment such as a predetermined temperature, temperature, humidity, pressure, gas concentration, and the like, such as various temperature test devices and constant humidity devices.

  The displacement measurement mechanism is not limited to one that acquires information of three-dimensional coordinates based on a triangulation method using a pair of cameras 51A (stereo camera). For example, the displacement measurement mechanism has a plurality of two-dimensional cameras that capture images of the test object S1 from a plurality of different directions, and derives three-dimensional coordinate information based on the images acquired by each two-dimensional camera. It may be something. Further, a plurality of image acquisition units 51 of the displacement measurement mechanism 50 may be provided for one surface of the test tank 10.

  In the above embodiment, the case where the displacement of the three-dimensional coordinates of the measurement point P1 in the test object S1 and various data are displayed on the display unit 60 in synchronization with each other is described. However, the present invention is not limited to this. Instead of displaying the data on the display unit 60, these data may simply be stored in synchronization.

  The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

Reference numerals 1 and 2 Environmental test apparatus 10 Test tank 17 Window 31 Temperature detector inside tank 33 Subject temperature detector 50 Displacement measurement mechanism 51 Image acquisition unit 54 Image processing unit 60 Display unit 70 Mounting mechanism P1 Measurement point S1 DUT

Claims (8)

A test tank for housing the test object, wherein the test tank provided with a window for observing the test object from outside the test tank,
An environmental test apparatus, comprising: a displacement measurement mechanism that is arranged to face the window and measures displacement of three-dimensional coordinates of a predetermined measurement point on the device under test. The displacement measurement mechanism,
An image acquisition unit that acquires an image of the test object housed in the test tank;
The environmental test apparatus according to claim 1, further comprising: an image processing unit configured to acquire a displacement amount of three-dimensional coordinates of the measurement point based on the image of the device under test acquired by the image acquisition unit. The image acquisition unit further includes an attachment mechanism for attaching the outside of the test tank,
The environmental test apparatus according to claim 2, wherein the image acquisition unit is attached by the attachment mechanism so as to be slidable along the window.   The environmental test apparatus according to claim 3, wherein the image acquisition unit is attached by the attachment mechanism such that an angle with respect to the window can be adjusted.   The environmental test apparatus according to any one of claims 2 to 4, wherein a plurality of the image obtaining units are provided so as to obtain images of the test object from multiple directions. A tank temperature detector for detecting the temperature in the test tank,
The temperature detected by the in-bath temperature detection unit at a predetermined timing during the test and the displacement of the three-dimensional coordinates of the measurement point measured by the displacement measurement mechanism at the predetermined timing are displayed in synchronization with each other. The environmental test apparatus according to claim 1, further comprising: a display unit configured to perform the operation. A subject temperature detection unit that detects the temperature of the test object,
The temperature detected by the subject temperature detection unit at a predetermined timing during the test and the displacement of the three-dimensional coordinates of the measurement point measured by the displacement measurement mechanism at the predetermined timing are displayed in synchronization with each other. The environmental test apparatus according to any one of claims 1 to 6, further comprising: a display unit configured to perform the operation. An apparatus for performing a charge / discharge test of the test object that is a secondary battery,
A display that displays the charge / discharge amount of the DUT at a predetermined timing during a test and the displacement of the three-dimensional coordinates of the measurement point measured by the displacement measurement mechanism at the predetermined timing in synchronization with each other. The environmental test apparatus according to any one of claims 1 to 7, further comprising a unit.

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