JP2013076632A - Thermal image data storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal image storage device not using any mechanical limit switch for detecting setting of a high-temperature object which is a monitoring target at a predetermined imaging position and capable of eliminating the necessity of a space for installing the mechanical limit switch and working costs.SOLUTION: Thermal image processing means 3 for processing a thermal image 2a is connected to thermal image generation means 2 for generating the thermal image 2a. The thermal image processing means 3 includes a position detection unit 30 for detecting, when a temperature in an area occupied by a ladle 4 in the thermal image 2a when the ladle 4 is set at a predetermined imaging position is monitored and the temperature in the area is equal to or more than a predetermined detection threshold value, the setting of the ladle 4 at the imaging position.

Description

  The present invention relates to a thermal image data storage device that stores thermal image data obtained by imaging a high-temperature object moving along a predetermined trajectory, and in particular, based on the thermal image that the high-temperature object is located at a predetermined imaging position. By detecting, it is possible to save thermal image data in which high-temperature objects exist at the same position without using a mechanical limit switch, eliminating the space and work cost for installing the mechanical limit switch It relates to a new improvement to make it possible.

  As this type of apparatus conventionally used, for example, a configuration shown in the following Patent Document 1 can be exemplified. That is, in the conventional apparatus, in order to detect that a high-temperature object to be monitored is located at a predetermined imaging position, when the high-temperature object is located at a predetermined imaging position, the mechanical device is brought into contact with the high-temperature object. A limit switch is installed. When it is detected by the operation of the mechanical limit switch that the high temperature object is located at the imaging position, the high temperature object is imaged and the thermal image is stored. As described above, by storing the thermal image in which the high-temperature object is present at the predetermined imaging position, it is possible to discover deterioration and abnormality of the high-temperature object by analyzing the stored thermal image.

Japanese Utility Model Publication No. 5-54529

  In the conventional apparatus as described above, since a mechanical limit switch is used to detect that a high-temperature object to be monitored is located at a predetermined imaging position, the space and work for installing the mechanical limit switch Cost is required.

  The present invention has been made to solve the above-described problems, and its purpose is to store thermal image data in which a high-temperature object exists at the same position without using a mechanical limit switch. It is possible to provide a thermal image data storage device that does not require a space and work cost for installing a mechanical limit switch.

  A thermal image data storage device according to the present invention is a thermal image data storage device that stores thermal image data obtained by imaging a high-temperature object that moves along a predetermined trajectory, and images a region including the trajectory to capture a thermal image. And a thermal image processing means that is connected to the thermal image generation means and processes the thermal image, and the thermal image processing means is configured to generate heat when a high-temperature object is located at a predetermined imaging position. A position detection unit that monitors the temperature in the area occupied by the high-temperature object in the image and detects that the high-temperature object is located at the imaging position when the temperature in the area is equal to or higher than a predetermined detection threshold; A storage unit that stores thermal image data when the high-temperature object is positioned at the imaging position when the position detection unit detects that the object is positioned at the imaging position.

In addition, in the region occupied by the high temperature object in the thermal image when the high temperature object is positioned at the imaging position, one end of the high temperature object along the moving direction of the high temperature object is positioned when the high temperature object is positioned at the imaging position. 1 position and the 2nd position where the other end of the high temperature object along the moving direction of the high temperature object is located when the high temperature object is located at the imaging position are included, and the position detection unit includes the first and second positions. When the temperature at the first position is equal to or higher than the first detection threshold and the temperature at the second position is equal to or higher than the second detection threshold, it is confirmed that the high-temperature object is located at the imaging position. To detect.
The position detection unit monitors the temperature of the entire region occupied by the high-temperature object in the thermal image when the high-temperature object is located at the imaging position, and if the temperature of the entire region is equal to or higher than the detection threshold, Is located at the imaging position.
Further, the position detection unit further monitors the temperature outside the region occupied by the high-temperature object in the thermal image when the high-temperature object is located at the imaging position, and the temperature outside the region is equal to or less than a threshold for preventing erroneous detection. When the condition is further satisfied, it is detected that the high temperature object is located at the imaging position.
The high temperature material is a ladle that transports the molten metal, and the position detection unit monitors the temperature outside the region below the region occupied by the ladle located at the imaging position in the thermal image.
In addition, when the position detection unit detects that the high temperature object is located at the imaging position, the storage unit stores temperature information at a position set in advance in the thermal image as thermal image data.
Further, the thermal image processing means monitors the order in which the temperatures of two locations separated from each other along the moving direction of the hot object in the thermal image are equal to or higher than a predetermined threshold, and the moving direction of the hot object is based on the order. The storage unit further includes a movement direction detection unit that detects the movement direction detected by the movement direction detection unit when the position detection unit detects that the high-temperature object is located at the imaging position. Save with.

  According to the thermal image data storage device of the present invention, the position detection unit has a temperature in a region occupied by the high-temperature object in the thermal image when the high-temperature object is located at a predetermined imaging position, which is equal to or higher than a predetermined detection threshold. In this case, since it is detected that the high temperature object is located at the imaging position, it can be detected based on the thermal image that the high temperature object is located at the predetermined imaging position. As a result, it is possible to save thermal image data in which a high-temperature object is present at the same position without using a mechanical limit switch, and to eliminate the space and work cost for installing the mechanical limit switch. it can.

It is a block diagram which shows the structure of the thermal image data storage apparatus by Embodiment 1 of this invention. It is a front view which shows the ladle of FIG. 1 when located in an imaging position. It is a flowchart which shows the thermal image data preservation | save operation | movement by the thermal image processing means of FIG. It is explanatory drawing which shows the 3rd monitoring area | region used with the thermal image data storage apparatus by Embodiment 2 of this invention. It is a flowchart which shows the thermal image data preservation | save operation | movement using the 3rd monitoring area | region of FIG. It is a block diagram which shows the structure of the thermal image data storage apparatus by Embodiment 3 of this invention. It is a flowchart which shows the thermal image data preservation | save operation | movement by the thermal image processing means of FIG. It is explanatory drawing which shows the monitoring area | region used with the thermal image data storage apparatus by Embodiment 4 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a thermal image data storage device 1 according to Embodiment 1 of the present invention, and FIG. 2 is a front view showing a ladle 4 of FIG. 1 when located at an imaging position. . In addition, in FIG. 1, the ladle 4 and the vacuum vessel 6 are shown with the plane. In FIG. 1, the thermal image data storage device 1 includes a camera 2 (thermal image generation means) and a thermal image processing means 3 connected to the camera 2. The camera 2 has an infrared element that detects infrared rays, and generates a thermal image 2a indicating a heat distribution in the imaging region 2b. In this Embodiment, the camera 2 is arrange | positioned so that the area | region above the vacuum vessel 6 containing the track | orbit 5 of the ladle 4 may be imaged (refer FIG.1 and FIG.2).

  As shown in FIG. 2, the ladle 4 is an upper-opening cylindrical container suspended by a crane 4 a and conveys the molten stainless steel 4 b (see FIG. 1) along a predetermined track 5. . In the present embodiment, the ladle 4 transports the molten stainless steel 4 b roughly decarburized in a decarburization furnace (not shown) such as a converter to the vacuum vessel 6, and vacuum oxygen blowing in the vacuum vessel 6. The wrought stainless steel melt 4b is conveyed to a continuous casting facility (not shown). That is, the movement of the ladle 4 includes a movement that is lowered from above the vacuum container 6 into the vacuum container 6 and a movement that is pulled up from inside the vacuum container 6 to above the vacuum container 6. In the present embodiment, the high temperature material is constituted by the ladle 4 and the molten metal is constituted by the stainless molten steel 4b.

  Returning to FIG. 1, the thermal image processing means 3 is constituted by arithmetic means such as a computer, for example, and performs processing of the thermal image 2 a generated by the camera 2. The thermal image processing means 3 includes a position detection unit 30 and a storage unit 31.

  The position detection unit 30 monitors the temperature in the region occupied by the high-temperature object 4 in the thermal image 2a when the ladle 4 is positioned at the predetermined imaging position, and the temperature in this region is equal to or higher than a predetermined detection threshold. If it is, it is detected that the high temperature object 4 is located at the imaging position.

  Specifically, as shown in FIG. 2, the position detection unit 30 includes first and second monitoring regions included in a region occupied by the high temperature object 4 in the thermal image 2 a when the high temperature object 4 is located at the imaging position. When the temperature of the first monitoring area 30a is equal to or higher than the first detection threshold and the temperature of the second monitoring area 30b is equal to or higher than the second detection threshold. Is located at the imaging position.

  The 1st monitoring area | region 30a is an area | region arrange | positioned in the location (1st position) where the end of the ladle 4 along the moving direction of the ladle 4 is located, when the ladle 4 is located in the predetermined imaging position, The 2nd monitoring area | region 30b is an area | region arrange | positioned in the location (2nd position) where the other end of the ladle 4 along the moving direction of the ladle 4 is located, when the ladle 4 is located in a predetermined imaging position. . When the imaging position is provided at a place where the ladle 4 moves in the vertical direction as in the present embodiment, when the ladle 4 is positioned at the imaging position, the upper end of the ladle 4 is placed in the first monitoring area 30a. Is positioned, and the lower end of the ladle 4 is positioned in the second monitoring region 30b. The first and second monitoring areas 30a and 30b are constituted by a plurality of pixels included in the thermal image 2a.

  Whether or not the temperature of each monitoring region 30a, 30b is equal to or higher than each detection threshold is determined by, for example, the number of pixels indicating the temperature equal to or higher than each detection threshold among the pixels included in each monitoring region 30a, 30b being predetermined. It is determined by whether or not the value exceeds the value, or whether or not the ratio of the pixels indicating the temperature equal to or higher than each detection threshold value exceeds a predetermined value.

  As the first and second detection thresholds, a temperature that is higher than the normal ambient temperature at the imaging position and is equal to or higher than the lowest outer surface temperature of the ladle 4 that houses the molten stainless steel 4b is set. For example, the first detection threshold to be compared with the temperature of the first monitoring region 30a is set to about 60 ° C., and the second detection threshold to be compared with the temperature of the second monitoring region 30b is set to about 100 ° C. . The first and second detection threshold values may be the same value.

  In FIG. 2, the first monitoring area 30a is set smaller than the second monitoring area 30b because the area occupied by the crane 4a in the thermal image 2a when the ladle 4 is located at the imaging position is the first. This is because the temperature of the ladle 4 itself can be monitored by avoiding being included in the monitoring region 30a.

  The storage unit 31 stores the data of the thermal image 2a when the ladle 4 is located at the imaging position when the position detection unit 30 detects that the ladle 4 is located at the imaging position. At this time, the storage unit 31 stores the entire data of the thermal image 2a and temperature information at a position set in advance in the thermal image 2a. The temperature information at the preset position is temperature information at a position arbitrarily set by the administrator in order to monitor the temperature trend. For example, the ladle at the height position in the ladle 4 where the slag exists. 4, the outer surface temperature of the bottom side surface portion of the ladle 4, and the like. In this way, by configuring not only the entire data of the thermal image 2a but also the temperature information of a preset position, when analyzing the data of the thermal image 2a, the temperature information of a specific position is manually added. It is possible to eliminate the need to extract Further, the temperature information of the preset position can be used to issue an alarm when the temperature at the position exceeds a predetermined value.

  Next, the operation of the thermal image processing means 3 will be described. FIG. 3 is a flowchart showing the thermal image data storing operation by the thermal image processing means 3 of FIG. In the figure, when the power of the thermal image processing means 3 is turned on, it is determined whether or not the temperatures of both the first and second monitoring areas 30a and 30b are equal to or higher than the first and second detection thresholds. 30 (step S10). At this time, if it is determined that the temperature of one of the first and second monitoring areas 30a and 30b is lower than the detection threshold value, the temperature of both the first and second monitoring areas 30a and 30b is the first. And the said determination is repeated until it becomes more than the 2nd detection threshold value.

  On the other hand, when it is determined that the temperatures of both the first and second monitoring areas 30a and 30b are equal to or higher than the detection threshold when the temperatures of the first and second monitoring areas 30a and 30b are determined, the ladle 4 is The position detection unit 30 detects that the camera is located at the imaging position (step S11), and the storage unit 31 stores the entire data of the thermal image 2a and the temperature information at a preset position in the thermal image 2a. (Steps S12 and S13). When the data of these thermal images 2a are stored, the thermal image data storage operation is terminated. This thermal image data storage operation is repeatedly performed when the thermal image processing means 3 is powered on.

  In such a thermal image data storage device, when the ladle 4 is positioned at a predetermined imaging position, the position detection unit 30 has a temperature in an area occupied by the ladle 4 in the thermal image 2a equal to or higher than a predetermined detection threshold. Since it is detected that the ladle 4 is located at the imaging position, it can be detected based on the thermal image 2a that the ladle 4 is located at the predetermined imaging position. Thereby, the data of the thermal image 2a in which the ladle 4 exists in the same position can be preserve | saved without using a mechanical limit switch, and the space and work cost for installing a mechanical limit switch are unnecessary. be able to.

  The position detection unit 30 monitors the temperatures of the first and second monitoring areas 30a and 30b, and the temperature of the first monitoring area 30a is equal to or higher than the first detection threshold and the temperature of the second monitoring area 30b. When the ladle 4 is equal to or greater than the second detection threshold, it is detected that the ladle 4 is located at the imaging position, so that the temperature monitoring area by the position detection unit 30 can be limited to a location sufficient for specifying the position of the ladle 4, The load required for processing the thermal image 2a can be reduced. Moreover, the possibility that an object not intended for the position detection of the ladle 4 is included in the temperature monitoring region can be reduced, and the accuracy of the position detection of the ladle 4 can be improved.

  Further, when the position detection unit 30 detects that the high-temperature object 4 is located at the imaging position, the storage unit 31 stores temperature information at a position set in advance in the thermal image 2a as data of the thermal image 2a. Therefore, when analyzing the data of the thermal image 2a, it is possible to eliminate the necessity of manually extracting temperature information at a specific position and improve convenience. Further, the temperature information of the preset position can be used to issue an alarm when the temperature at the position exceeds a predetermined value.

Embodiment 2. FIG.
FIG. 4 is an explanatory diagram showing the third monitoring area 30c used in the thermal image data storage device 1 according to the second embodiment of the present invention, and FIG. 5 shows thermal image data using the third monitoring area 30c of FIG. It is a flowchart which shows a preservation | save operation | movement. The overall configuration of the thermal image data storage device 1 is the same as the configuration of the first embodiment, and therefore FIG. 1 is also referred to for the description of the configuration of the second embodiment.

  In this Embodiment 2, the position detection part 30 is the 3rd monitoring area | region 30c arrange | positioned outside the area | region which the ladle 4 occupies in the thermal image 2a, when the ladle 4 is located in the imaging position (refer FIG. 4). When the temperature (outside the area) is further monitored and the condition that the temperature in the third monitoring area 30c is equal to or lower than a predetermined false detection prevention threshold is further satisfied, the ladle 4 is (See step S20 in FIG. 5). In other words, in the position detection unit 30 of the second embodiment, the ladle 4 is positioned at the imaging position unless the condition that the temperature of the third monitoring region 30c is equal to or lower than the false detection prevention threshold is further satisfied. Does not detect that.

  Here, as explained in the first embodiment, the ladle 4 is a container having an upper opening. For example, when the vacuum container 6 is opened, a large flame may blow out from the upper opening of the ladle 4. . When it is detected that the ladle 4 is located at the imaging position when the temperatures of both the first and second monitoring areas 30a and 30b are equal to or higher than the detection threshold as in the first embodiment, the ladle When the flame blown out from the opening 4 hits both the first and second monitoring areas 30a and 30b, it may be erroneously detected that the ladle 4 is located at the imaging position. So, in this Embodiment, when the ladle 4 is located in the imaging position, the temperature of the 3rd area | region 30a arrange | positioned outside the area | region which the ladle 4 occupies in the thermal image 2a is below the threshold value for false detection prevention. Is added to the detection of the position of the pan 4 to reduce the possibility of the erroneous detection as described above.

  In particular, the third monitoring region 30c is provided adjacent to the second region 30c so as to be positioned below the region occupied by the ladle 4 located at the imaging position in the thermal image 2a. Assuming that the third monitoring region 30c is set in the region above the ladle 4, when the flame is blown from the upper opening of the ladle 4, the ladle 4 is positioned at the imaging position due to the influence of the flame. It is also conceivable that it cannot be detected. Therefore, by arranging the third monitoring region 30c below the ladle 4 as described above, it is possible to prevent the fact that the ladle 4 is located at the imaging position due to the influence of flame.

  In addition, the structure which arrange | positions the 3rd monitoring area | region 30c below the ladle 4 is a structure especially useful when a flame blows up from the ladle 4 located in the imaging position, from the ladle 4 located in the imaging position. When the possibility that the flame is blown up is low, and when detecting the position of another high-temperature object, the third region is placed at another position such as above or on the side of the region occupied by the high-temperature object in the thermal image 2a. May be arranged. Other configurations are the same as those in the first embodiment.

  In such a thermal image data storage device 1, the position detection unit 30 further sets the temperature of the third monitoring region 30 c outside the region occupied by the high-temperature object 4 in the thermal image 2 a when the ladle 4 is positioned at the imaging position. Monitoring and detecting that the ladle 4 is located at the imaging position when the condition that the temperature of the third monitoring region 30c is equal to or lower than the false detection prevention threshold is further satisfied, the flame from the ladle 4 Even in the case where the mist is blown out, the possibility of erroneous detection due to the influence of the flame can be reduced, and the accuracy of storing the data of the thermal image 2a can be improved.

  Further, since the position detection unit 30 monitors the temperature of the third monitoring region 30c below the region occupied by the ladle 4 located at the imaging position in the thermal image 2a, flames are emitted from the ladle 4 located at the imaging position. Even when it blows up, it can detect more reliably that the ladle 4 is located in the imaging position, and can further improve the position detection accuracy of the ladle 4.

Embodiment 3 FIG.
6 is a block diagram showing the configuration of the thermal image data storage device 1 according to the third embodiment of the present invention, and FIG. 7 is a flowchart showing the thermal image data storage operation by the thermal image processing means 3 of FIG. . The configuration of the third embodiment is a configuration in which a moving direction detection unit 32 is added to the configuration of the second embodiment. The movement direction detector 32 monitors the order in which the temperatures of the first and second monitoring areas 30a, 30b are equal to or higher than the respective detection thresholds, and detects the movement direction of the ladle 4 based on this order.

  That is, when the temperature of the second monitoring region 30b becomes equal to or higher than the second detection threshold after the temperature of the first monitoring region 30a becomes equal to or higher than the first detection threshold, the moving direction detection unit 32 determines the ladle 4 Is detected from above the vacuum vessel 6. In addition, when the temperature of the first monitoring region 30a becomes equal to or higher than the first detection threshold after the temperature of the second monitoring region 30b becomes equal to or higher than the second detection threshold, the moving direction detection unit 32 detects the ladle 4. Is detected to be pulled up from the vacuum vessel 6.

  The storage unit 31 stores the movement direction detected by the movement direction detection unit 32 together with the data of the thermal image 2a when the position detection unit 30 detects that the ladle 4 is located at the imaging position (FIG. 7). Step S30). Other configurations are the same as those of the second embodiment.

  In such a thermal image data storage device, the moving direction detector 32 monitors the order in which the temperatures of the first and second monitoring areas 30a, 30b are equal to or higher than the respective detection thresholds, and based on this order, the ladle 4 is detected, and the storage unit 31 detects the movement direction detected by the movement direction detection unit 32 when the position detection unit 30 detects that the ladle 4 is located at the imaging position. Therefore, it is possible to more reliably determine at which timing the data of the thermal image 2a stored by the storage unit 31 is, and the convenience in analyzing the data of the thermal image 2a is greatly improved. it can.

  In the third embodiment, the movement direction detection unit 32 is described as being added to the configuration of the second embodiment. However, the movement direction detection unit 32 may be added to the configuration of the first embodiment. That is, regardless of whether or not position detection using a false detection prevention threshold is performed, the moving direction detection unit may detect the moving direction of the high-temperature object.

  In the third embodiment, the movement direction detection unit 32 is described as monitoring the order in which the temperatures of the first and second monitoring regions 30a and 30b are equal to or higher than the detection thresholds. In the thermal image, the temperature at a location different from the position at which the position detection unit monitors the temperature may be monitored as long as the location is two locations separated from each other along the moving direction of the high-temperature object. That is, a monitoring region or a monitoring point only for the movement direction detection unit to monitor the temperature may be separately provided. Further, the threshold used by the movement direction detection unit may be a threshold different from the threshold used by the position detection unit.

  Furthermore, in Embodiments 1-3, while detecting that the ladle 4 is located at the imaging position based on the temperature of the first to third monitoring regions 30a to 30c having a two-dimensional spread, Although it has been described that the moving direction of the ladle 4 is detected, the above determination is made based on the temperature of a point (one pixel) included in the thermal image 2a instead of such a region composed of a plurality of pixels. May be.

Embodiment 4 FIG.
FIG. 8 is an explanatory diagram showing a monitoring area 30d used in the thermal image data storage device according to the fourth embodiment of the present invention. The overall configuration of the thermal image data storage device 1 is the same as the configuration of the first embodiment, and therefore FIG. 1 is also referred to for the description of the configuration of the fourth embodiment. The position detection unit 30 of the first embodiment has detected that the ladle 4 is located at the imaging position based on the temperatures of the two monitoring regions 30a and 30b provided in the thermal image 2a. When the ladle 4 is positioned at a predetermined imaging position, the position detection unit 30 of the fourth embodiment monitors the temperature with the entire area occupied by the ladle 4 in the thermal image 2a as one monitoring area 30d, When the temperature of the monitoring region 30d is equal to or higher than the detection threshold, it is detected that the high temperature object 4 is located at the imaging position.

  Whether or not the temperature of the monitoring region 30d is equal to or higher than a predetermined detection threshold value is, for example, whether or not the number of pixels having a temperature equal to or higher than the detection threshold value among pixels included in the monitoring region 30d exceeds a predetermined value. Or whether the ratio of pixels indicating a temperature equal to or higher than the detection threshold exceeds a predetermined value. Other configurations are the same as those in the first embodiment.

  In this way, when the high temperature object 4 is positioned at the imaging position, the temperature of the entire region occupied by the high temperature object 4 in the thermal image 2a is monitored, and when the temperature of the entire region is equal to or higher than the detection threshold, It is also possible to detect that 4 is located at the imaging position. Even when this configuration is adopted, the data of the thermal image 2a in which the ladle 4 is present at the same position can be stored without using the mechanical limit switch, and the space and work cost for installing the mechanical limit switch Can be made unnecessary.

  Note that the configuration of the second embodiment can be combined with the configuration of the fourth embodiment. That is, as in the fourth embodiment, when the ladle 4 is positioned at a predetermined imaging position, the entire area occupied by the ladle 4 in the thermal image 2a is taken as one monitoring area 30d and the temperature is monitored. When the high temperature object 4 is positioned at the imaging position, the temperature outside the area occupied by the high temperature object 4 in the thermal image 2a is further monitored, and the condition that the temperature outside the area is equal to or lower than the false detection prevention threshold is further set. When it is satisfied, it can be configured to detect that the high temperature object 4 is located at the imaging position.

  Further, the configuration of the third embodiment can be combined with the configuration of the fourth embodiment. That is, even when the configuration as in the fourth embodiment is adopted, the movement direction detection unit monitors the order in which the temperatures at two locations separated from each other along the movement direction of the high-temperature object in the thermal image are equal to or higher than a predetermined threshold. And you may detect the moving direction of the ladle 4 based on this order.

  Moreover, in Embodiment 1-4, although the ladle 4 is made into the monitoring object, it moves along predetermined track | orbits, such as a chaotic car (topped car) in a steel mill, for example, Comprising: Heat higher than atmospheric temperature Other high-temperature objects that can be identified in the thermal image by having them may be monitored.

1 thermal image data storage device 2 camera (thermal image generation means)
2a Thermal image 3 Thermal image processing means 4b Molten stainless steel (molten metal)
4 Ladle (high temperature)
5 Trajectory 30 Position detection unit 31 Storage unit 32 Movement direction detection unit

Claims (7)

A thermal image data storage device that stores data of a thermal image (2a) obtained by imaging a high temperature object (4) moving along a predetermined trajectory (5),
Thermal image generation means (2) for imaging the region including the trajectory (5) and generating the thermal image (2a);
A thermal image processing means (3) connected to the thermal image generation means (2) and performing processing of the thermal image (2a);
The thermal image processing means (3)
When the high temperature object (4) is located at a predetermined imaging position, the temperature in the area occupied by the high temperature object (4) in the thermal image (2a) is monitored, and the temperature in the area is detected in a predetermined manner. A position detection unit (30) that detects that the high temperature object (4) is located at the imaging position when it is equal to or greater than the threshold for use;
The thermal image (2a) when the high temperature object (4) is positioned at the imaging position when the position detection unit (30) detects that the high temperature object (4) is positioned at the imaging position. A thermal image data storage device, comprising: a storage unit (31) for storing the data. When the high temperature object (4) is located at the imaging position, the high temperature object (4) is located at the imaging position within the region occupied by the high temperature object (4) in the thermal image (2a). The first position (30a) where one end of the high temperature object (4) along the moving direction of the high temperature object (4) is positioned, and the high temperature object (4) when the high temperature object (4) is positioned at the imaging position. 4) and the second position (30b) at which the other end of the high temperature object (4) along the moving direction is located,
The position detector (30) monitors the temperature of the first and second positions (30a, 30b), the temperature of the first position (30a) is equal to or higher than a first detection threshold, and the first The thermal image data storage according to claim 1, wherein when the temperature at the second position (30b) is equal to or higher than a second detection threshold, it is detected that the high temperature object (4) is positioned at the imaging position. apparatus.   The position detector (30) monitors the temperature of the entire region occupied by the high temperature object (4) in the thermal image (2a) when the high temperature object (4) is located at the imaging position, and The thermal image data storage device according to claim 1, wherein when the temperature of the entire area is equal to or higher than the detection threshold, it is detected that the high temperature object (4) is located at the imaging position.   The position detector (30) further monitors the temperature outside the region occupied by the high temperature object (4) in the thermal image (2a) when the high temperature object (4) is located at the imaging position, The detection that the high-temperature object (4) is located at the imaging position is further performed when a condition that the temperature outside the region is equal to or lower than a false detection prevention threshold is further satisfied. The thermal image data storage device according to any one of claims 3 to 4. The high temperature object (4) is a ladle (4) for conveying the molten metal (4b),
The said position detection part (30) monitors the temperature outside the said area | region below the area | region which the said ladle (4) located in the said imaging position occupies in the said thermal image (2a). 4. The thermal image data storage device according to 4.   When the position detection unit (30) detects that the high temperature object (4) is located at the imaging position, the storage unit (31) has a position set in advance in the thermal image (2a). The thermal image data storage device according to any one of claims 1 to 5, wherein temperature information is stored as data of the thermal image (2a). The thermal image processing means (3) monitors the order in which the temperatures at two locations separated from each other along the moving direction of the high temperature object (4) in the thermal image (2a) are equal to or higher than a predetermined threshold value, A moving direction detector (32) for detecting a moving direction of the high temperature object (4) based on the order;
The storage unit (31) detects the movement direction detection unit (32) when the position detection unit (30) detects that the high temperature object (4) is located at the imaging position. The thermal image data storage device according to any one of claims 1 to 6, wherein the moving direction is stored together with the data of the thermal image (2a).

Images