JP2023153623A - Temperature measurement system, temperature measurement device, and temperature measurement method - Google Patents

Abstract

To provide a temperature measurement system which enables appropriate correction of temperature of a desired object within a shooting range.SOLUTION: A temperature measurement system according to an embodiment comprises a camera, an illumination unit, and a process execution unit. The camera captures an image to detect temperature-related or humidity-related parameter within a shooting range. The illumination unit is emits light and is provided integrally with or in the vicinity of the camera. The process execution unit specifies a temperature measurement point in the captured image acquired by the camera.SELECTED DRAWING: Figure 2

Description

Embodiments of the present invention relate to a temperature measurement system, a temperature measurement device, and a temperature measurement method.

BACKGROUND OF THE INVENTION Using a camera such as a thermal camera, the temperature in the photographing range of the camera is measured. When measuring temperature using such a camera, it is necessary to appropriately measure the temperature of a desired measurement target within the shooting range, rather than the temperature of the entire shooting range (photographed image) taken by the camera. It is being For example, when photography is performed with a camera in a factory or the like, it is required to appropriately measure the temperature at a predetermined facility within the photography range.

JP2019-169388A

The problem to be solved by the present invention is to provide a temperature measurement system, a temperature measurement device, and a temperature measurement method that can appropriately measure the temperature of a desired measurement target within a photographing range.

According to the embodiment, the temperature measurement system includes a camera, a lighting section, and a processing execution section. By photographing, the camera detects either temperature or temperature-related parameters in the photographing range. The illumination unit emits light and is provided integrally with the camera or near the camera. The processing execution unit specifies a temperature measurement location in the image captured by the camera.

According to the present invention, it is possible to provide a temperature measurement system, a temperature measurement device, and a temperature measurement method that can appropriately measure the temperature of a desired measurement target within a shooting range.

FIG. 1 is a schematic diagram showing an example of a usage state of the temperature measurement system according to the first embodiment. FIG. 2 is a block diagram schematically showing the system configuration of the example temperature measurement system shown in FIG. FIG. 3 is a schematic diagram illustrating an example of a process of designating a temperature measurement location in an image captured by a camera, which is performed by the measurement location designation unit of the temperature measurement system according to the first embodiment. FIG. 4 is a schematic diagram illustrating an example of notification information generated by the notification information generation unit of the temperature measurement system according to the first embodiment. FIG. 5 is a flowchart schematically showing an example of a process performed by the process execution unit of the temperature measurement system according to the first embodiment. FIG. 6 is a schematic diagram showing an example of a usage state of the temperature measurement system according to the first modification. FIG. 7 is a schematic diagram showing an example of a usage state of the temperature measurement system according to the second modification. FIG. 8 is a block diagram schematically showing the configuration of a temperature measuring device according to a third modification.

The temperature measurement system (1) of the embodiment includes a camera (11), a lighting section (12), and a processing execution section (21). By photographing, the camera (11) detects either temperature or temperature-related parameters in the photographing range (A1; A1, A2). The illumination unit (12) emits light and is provided integrally with the camera (11) or in the vicinity of the camera (11). The processing execution unit (21) specifies the temperature measurement location in the image taken by the camera (11). Therefore, by using the temperature measurement system (1), it is possible to appropriately measure the temperature of a desired measurement target within the photographing range (A1; A1, A2) of the camera (11).

In the temperature measurement system (1) of the embodiment, the processing execution unit (21) specifies a plurality of temperature measurement locations in the captured image (A1; A1, A2) of the camera (11). Therefore, it is possible to appropriately measure the temperature of each of the plurality of measurement targets within the photographing range (A1; A1, A2) of the camera (11).

In the temperature measurement system (1) of the embodiment, the processing execution unit (21) sets a corresponding threshold value for each temperature of the specified measurement location, and determines whether the temperature of each measurement location exceeds the threshold value. Determine. Therefore, for each temperature of the measurement location, an appropriate threshold value is set based on the usable temperature range of the corresponding equipment to be measured. Then, it is possible to determine whether or not the temperature is appropriate for the measurement target corresponding to each measurement location based on the appropriately set threshold value.

In the temperature measurement system (1) of the embodiment, the processing execution unit (21) issues a warning when the temperature exceeds the threshold value at any of the specified measurement locations. Therefore, the user of the temperature measurement system (1) can appropriately recognize that a temperature abnormality such as a fire has occurred in the measurement target corresponding to any of the measurement locations.

The temperature measuring device (8) of the embodiment includes a camera (11), a lighting section (12), and a processing execution section (21). By photographing, the camera (11) detects either temperature or temperature-related parameters in the photographing range (A1; A1, A2). The illumination unit (12) emits light and is provided integrally with the camera (11) or in the vicinity of the camera (11). The processing execution unit (21) specifies the temperature measurement location in the image taken by the camera (11). Therefore, by using the temperature measuring device (8), it becomes possible to appropriately measure the temperature of a desired measurement target within the photographing range (A1; A1, A2) of the camera (11).

In the temperature measurement method of the embodiment, by photographing with the camera (11), one of the temperature and temperature-related parameters in the photographing range (A1; A1, A2) of the camera (11) is detected. In the temperature measurement method, light is emitted from an illumination unit (12) provided integrally with the camera (11) or in the vicinity of the camera (11). In the temperature measurement method, a temperature measurement location is specified in an image taken by the camera (11). Therefore, the temperature measurement method makes it possible to appropriately measure the temperature of a desired measurement target within the photographing range (A1; A1, A2) of the camera (11).

Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
First, a first embodiment will be described. FIG. 1 shows an example of a usage state of the temperature measurement system 1 according to the first embodiment, and FIG. 2 shows a system configuration of the example temperature measurement system 1 of FIG. 1. As shown in FIGS. 1 and 2, the temperature measurement system 1 includes a processing device 10, a camera 11, and an illumination unit 12. In the example of FIGS. 1 and 2, the camera 11 and the illumination unit 12 are mounted on the device 13, and the camera 11 and the illumination unit 12 are integrally provided with respect to each other. That is, a device 13 in which a camera 11 and a lighting section 12 are integrated is provided. Further, as shown in FIG. 1 and the like, a device 13 including a camera 11 and a lighting section 12 is installed on a ceiling wall 17 of the space 16.

Camera 11 is a thermal camera. The camera 11 photographs a photographing range A1 in the space 16. At this time, the camera 11 photographs the photographing range A1 by capturing infrared rays (far-infrared rays) incident on the camera 11 from the photographing range A1. Therefore, by photographing with the camera 11, an infrared image is generated as a photographed image of the photographing range A1. Further, the camera 11 photographs the subject by forming an image of the subject in the photographing range A1 on the image sensor using the imaging optical system. By photographing as described above, the camera 11 detects the intensity of infrared rays incident on the camera 11 from the photographing range A1 as a parameter related to the temperature in the photographing range A1.

The illumination unit 12 irradiates an irradiation range B1 in the space 16 with light having a peak wavelength in the wavelength range of visible light. The illumination unit 12 includes any one of an LED, a fluorescent lamp, an incandescent lamp, etc. as a light source. At least a part of the photographing range A1 by the camera 11 overlaps with the irradiation range B1 of the light from the illumination unit 12.

In the example of FIG. 1, the space 16 is a space where equipment for manufacturing products in a factory or the like is arranged, and equipment E1 to E3 are arranged in the photographing range A1 by the camera 11. The positions where each of the equipment E1 to E3 is arranged are included in the light irradiation range B1 by the illumination unit 12. Note that in the example of FIG. 1, the light emitted from the illumination unit 12 does not directly enter the camera 11. That is, direct light from the illumination section 12 does not enter the camera 11. However, the reflected light reflected at the irradiation range B1 after being emitted from the illumination unit 12 may be incident on the camera 11. Further, in the example of FIG. 1, the camera 11 is provided integrally with the illumination unit 12 and is arranged on the ceiling wall 17 of the space 16. Therefore, by photographing with the camera 11, an overhead image showing a plurality of facilities such as the facilities E1 to E3 is generated as a photographed image.

The processing device 10 includes a processing execution section 21, a data storage section 22, a communication interface 23, and a user interface 24, and the processing execution section 21 includes a measurement point specification section 25, a temperature calculation section 26, a determination section 27, and a notification information generation section. 28. Each of the measurement point designation unit 25, temperature calculation unit 26, determination unit 27, and notification information generation unit 28 performs a part of the processing performed by the processing execution unit 21. In the processing device 10, the processing execution unit 21 and the like communicate with other devices and devices including the device 13 via the communication interface 23.

In one example, the processing device 10 is configured from a terminal device such as a smartphone or a computer, and includes a processor or an integrated circuit, and a storage medium such as a memory. In the processing device 10, the processor or integrated circuit includes a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), a microcomputer, an FPGA (Field Programmable Gate Array), a GPU (Graphics Processing Unit), and a DSP (Digital Signal processor). Contains any of the following. The processing device 10 may include only one integrated circuit or the like, or may include a plurality of integrated circuits or the like. Furthermore, the processing device 10 may include only one storage medium, or may include multiple storage media. In the processing device 10, a processor or an integrated circuit functions as a processing execution unit 21, and a storage medium functions as a data storage unit 22.

In the processing device 10, a processor or the like executes a program or the like stored in a storage medium or the like, so that the processing execution unit 21 performs the processing described below. In one example, a program executed by a processor or the like in the processing device 10 may be stored in a computer (server) connected via a network such as the Internet, or a server in a cloud environment. In this case, the processor of the processing device 10 downloads the program via the network.

Furthermore, in another example, the processing device 10 is composed of a plurality of computers. In this case, the processors of the plurality of computers work together to perform the processing by the processing execution unit 21. In another example, the processing device 10 is configured from a server in a cloud environment. The infrastructure of the cloud environment is composed of virtual processors such as virtual CPUs and cloud memory. In a server in a cloud environment serving as the processing device 10, a virtual processor or the like functions as the processing execution unit 21, and the processing by the processing execution unit 21 is performed by the virtual processor or the like. The cloud memory then functions as the data storage unit 22.

A user of the temperature measurement system 1 or the like can input operations on the user interface 24 . The user interface 24 of the processing device 10 can notify the user of the temperature measurement system 1 and the like of the information. In the user interface 24, information is notified by, for example, displaying a screen, making a sound, or turning on a light. In one example, user interface 24 includes a touch panel. Then, operations can be input on the touch panel, and information and the like are displayed on the touch panel. Note that the user interface 24 may be provided separately from the processing device 10.

The processing execution unit 21 receives photographic data acquired by photographing with the camera 11 from the camera 11 via the communication interface 23 . The photographic data includes a photographed image of the photographing range A1 photographed by capturing infrared rays incident on the camera 11. Further, the photographing data includes detection results of parameters related to temperature in the photographing range A1. As the detection result of the temperature-related parameter in the photographing range A1, for example, the detection result of the intensity of infrared rays incident on the camera 11 from the photographing range A1 is acquired.

Here, the image captured by the camera 11 is composed of a large number of pixels. For each pixel constituting the photographed image, a corresponding location in the photographing range A1 is indicated. The processing execution unit 21 acquires the intensity of infrared rays incident on the camera 11 from the corresponding location in the photographing range A1 for each pixel forming the photographed image. That is, the processing execution unit 21 acquires, for each pixel, the intensity of infrared rays incident on the camera 11 from the corresponding location in the photographing range A1 for the image photographed by the camera 11.

The measurement point specifying unit 25 specifies a temperature measurement point in the image taken by the camera 11. The measurement location designation unit 25 may designate only one temperature measurement location, or multiple temperature measurement locations, in the photographed image capturing infrared rays. In one example, the measurement point specifying unit 25 specifies a measurement point based on an operation input on the user interface 24 by a user of the temperature measurement system 1 or the like.

In one example, the temperature is measured for one or more measurement targets within the photographing range A1. Then, for each measurement target, position information in the image taken by the camera 11 is stored in the data storage unit 22. The measurement point designation unit 25 reads position information in the captured image for each measurement target from the data storage unit 22. Based on the read position information, the measurement location designation unit 25 designates locations where each of the temperature measurement targets is indicated as temperature measurement locations in the photographed image. When the measurement location is specified as in this example, the photographing range A1 by the camera 11 in the space 16 and the arrangement of the equipment, etc. that is the object of temperature measurement in the space 16 do not change over time. shall be.

In another example, the processing execution unit 21 acquires a visible light image that captures visible light incident on the camera 11 from the imaging range A1, in addition to the above-mentioned captured image that captures infrared rays. In the visible light image, the same photographing range A1 as the photographed image which is the infrared image is photographed. In this example, the measurement location specifying unit 25 specifies the location where the temperature measurement target is shown in the captured image, which is an infrared image, by performing image processing on a visible light image that captures visible light. At this time, the measurement location specifying unit 25 detects locations where each of the one or more measurement targets is indicated in the visible light image by, for example, performing edge detection processing on the visible light image. Then, the measurement location specifying unit 25 specifies locations corresponding to each of the detected locations of the measurement target in the captured image, which is an infrared image. As a result, in the photographed image, which is an infrared image, the locations where each of the equipment, etc. whose temperature is to be measured are indicated.

In this example, the measurement location designation unit 25 designates locations identified as locations where each of the temperature measurement targets is shown as temperature measurement locations in the photographed image. Note that in specifying the temperature measurement location, image processing of the visible light image and the like are performed based on, for example, an algorithm stored in the data storage unit 22. Further, in specifying the temperature measurement location, image processing of the visible light image, etc. may be performed using a learning model stored in the data storage unit 22. In this case, a model is trained using a visible light image showing equipment to be measured as learning data, and a learning model is generated.

FIG. 3 describes an example of a process for specifying a temperature measurement location in an image taken by the camera 11 that captures infrared rays. In the example of FIG. 3, the measurement location specifying unit 25 surrounds the temperature measurement locations with frames F1 to F3, respectively, in the photographed image I1 of the photographing range A1 in which infrared rays are captured. As a result, in the captured image I1, the locations surrounded by each of the frames F1 to F3 are designated as temperature measurement locations. Here, in the captured image I1, the measurement location surrounded by the frame F1 shows the equipment E1, which is one of the temperature measurement targets, and the measurement location surrounded by the frame F2 shows the equipment E1, which is the temperature measurement target. In the measurement location surrounded by the frame F3, the equipment E3, which is different from the equipment E1 and E2 whose temperature is to be measured, is shown. Therefore, in the example of FIG. 3, in the image I1 taken by the camera 11, the locations where each of the equipment E1 to E3 is shown are designated as temperature measurement locations.

The temperature calculation unit 26 calculates the temperature for each of the specified temperature measurement locations in the photographed image. At this time, the temperature calculation unit 26 calculates the temperature for each of the specified measurement locations based on the detection results of parameters related to temperature in the photographing range A1. In one example, as a detection result of a parameter related to temperature in the photographing range A1, the intensity of infrared rays incident on the camera 11 from a corresponding location in the photographing range A1 is acquired for each pixel of an image photographed by the camera 11. be done. The data storage unit 22 stores relationship data indicating the relationship between the intensity of infrared rays incident on the camera 11 and the temperature. In this example, the temperature of each designated measurement location is calculated based on the above-mentioned detection result of the intensity of infrared rays, which is a temperature-related parameter, and related data.

When calculating the temperature for one measurement location, the temperature calculation unit 26 calculates the temperature for each of one or more pixels included in the measurement location based on the detection result of the infrared intensity and related data. , calculate the temperature. If the measurement location includes one pixel, the temperature of one pixel is calculated as the temperature of the measurement location. Furthermore, when a plurality of pixels are included in a measurement location, the average value of the temperatures of the plurality of pixels is calculated as the temperature of the measurement location. Temperatures are calculated in the same manner for other measurement locations.

Note that the temperature calculation unit 26 may correct the temperature of each measurement location calculated as described above based on the detection result of the infrared intensity and related data. Here, within the photographing range A1 of the camera 11, the distance from the camera 11 is longer at the edge of the angle of view of the camera 11 than at the center of the angle of view of the camera 11. Therefore, even if the equipment is the same, when it is placed at the edge of the field of view of the camera 11, the equipment is not shown in the image taken by the camera 11, compared to when it is placed at the center of the field of view of the camera 11. The number of pixels included in the location is small. Therefore, by correcting the temperature calculated for each measurement location based on the position of the measurement target corresponding to the measurement location in the photographing range A1, the temperature of each measurement location can be derived more appropriately.

In one example, the temperature calculation unit 26 defines, for one temperature measurement location, a state in which a measurement target corresponding to the measurement location is located at the center of the angle of view of the camera 11 as a virtual state. Then, in a captured image taken by the camera 11 in a virtual state, a location where a measurement target corresponding to the measurement location is shown is defined as a virtual location. The temperature calculation unit 26 calculates the number of pixels included in a virtual location in an image taken in a virtual state. The number of pixels included in a virtual location in a captured image in a virtual state is based on the position information, angle of view and resolution of the camera 11, and the distance in the imaging range A1 between the measurement target corresponding to the measurement location and the camera 11. is calculated.

The distance between the measurement object corresponding to the measurement point and the camera 11 is determined by the position information of the camera 11 including the installation height of the camera 11, the height information of the measurement object corresponding to the measurement point, and the measurement object corresponding to the measurement point. It can be derived based on the distance along the horizontal direction from the center of the angle of view of the camera 11 up to. Then, the temperature calculation unit 26 compares the number of pixels included in the virtual location in the captured image in the virtual state with the number of pixels included in the measurement location in the actual captured image, and calculates the calculated measurement location based on the comparison result. to compensate for the temperature. In this example, the temperature of one measurement point is corrected based on the position of the measurement point in the photographed image, that is, based on the position of the measurement target corresponding to the measurement point in the angle of view of the camera 11. Ru. Note that the temperature can be corrected in the same manner for other measurement locations.

Furthermore, when a measurement target is located at the end of the field of view of the camera 11, the measurement location corresponding to the measurement target in the image taken by the camera 11 may be smaller than one pixel. In this case, in the captured image, one pixel in which a measurement location exists is composed of the measurement location and a portion other than the measurement location. Regarding a measurement location smaller than one pixel in the photographed image, the temperature calculation unit 26 calculates the temperature of one pixel in which the measurement location exists. Then, the occupancy rate of the measurement location in one pixel where the measurement location exists is calculated. Then, the temperature calculation unit 26 calculates the measured value of the temperature of the measurement location based on the temperature of one pixel where the measurement location exists and the occupancy rate of the measurement location in one pixel where the measurement location exists.

Furthermore, in this embodiment, as described above, at least a portion of the photographing range A1 by the camera 11 overlaps with the irradiation range B1 of the light from the illumination unit 12. Therefore, the light emitted from the illumination unit 12 is reflected at the measurement object such as equipment corresponding to any of the temperature measurement points, and the reflected light from the measurement object corresponding to any of the measurement points is reflected by the camera 11. There is a possibility that it will be incident on the Here, when the reflected light from the measurement object corresponding to one of the temperature measurement points is incident on the camera 11, the intensity of the infrared rays incident on the camera 11 from the measurement object is as follows: There is a possibility that it is different from the case where the light does not enter 11. Therefore, for a measurement location where reflected light enters the camera 11 from the corresponding measurement target, by correcting the temperature in consideration of the influence of the reflected light entering the camera 11, the temperature at that measurement location can be adjusted more appropriately. derived.

In one example, the temperature is corrected as follows for one measurement location where reflected light from the corresponding measurement target enters the camera 11. That is, information regarding the reflected light incident on the camera 11 from the measurement target corresponding to the measurement location is stored in the data storage unit 22. The information regarding the reflected light that enters the camera 11 from the measurement target includes information about the intensity of the reflected light from the measurement target at the camera 11, and information about the intensity of infrared rays at the camera 11 caused by the reflected light from the measurement target. This includes information about changes, etc. In this example, the temperature calculation unit 26 corrects the calculated temperature for the measurement location based on information regarding reflected light incident on the camera 11. As a result, the temperature of the measurement location excluding the influence of reflected light incident on the camera 11 is derived. Note that the temperature can be corrected in the same manner for other measurement locations where the reflected light enters the camera 11.

Further, in the example of FIG. 1, direct light from the illumination unit 12 does not enter the camera 11, but depending on the positional relationship between the camera 11 and the illumination unit 12, direct light from the illumination unit 12 may enter the camera 11. . When direct light from the illumination unit 12 enters the camera 11, the intensity of infrared rays entering the camera 11 may be different from when direct light does not enter the camera 11. Therefore, a more appropriate temperature can be derived by correcting the temperature for each measurement location in consideration of the influence of direct light incident on the camera 11.

In one example, information regarding direct light incident on the camera 11 from the illumination unit 12 is stored in the data storage unit 22. The information regarding the direct light that enters the camera 11 from the illumination unit 12 includes information about the intensity of the direct light from the illumination unit 12 at the camera 11, and information about the infrared rays at the camera 11 caused by the direct light from the illumination unit 12. This includes information about changes in the intensity of the . In this example, the temperature calculation unit 26 corrects the calculated temperature for each measurement location based on information regarding direct light incident on the camera 11. Thereby, the temperature excluding the influence of direct light incident on the camera 11 is derived for each measurement location.

The temperature calculating unit 26 calculates the calculated value calculated as described above based on the detection result of the infrared ray intensity and related data, or the correction value corrected as described above for the temperature of each measurement location. , derived as a measured value. The determination unit 27 acquires the measured value of each temperature at the measurement location, and determines the temperature of each measurement location based on the acquired measurement value.

The determination unit 27 sets a corresponding threshold value for each temperature of the designated temperature measurement location in the photographed image. The threshold value for each temperature of the measurement location is set, for example, to a value based on the usable temperature range of equipment to be measured corresponding to the measurement location. In one example, as in the example in FIG. 3, measurement points surrounded by frames F1 to F3 in the photographed image are designated. At the measurement point surrounded by the frame F1, a value based on the usable temperature range of the equipment E1, which is the corresponding measurement target, is applied, and at the measurement location, which is surrounded by the frame F2, the value is set to the value based on the usable temperature range of the equipment E1, which is the corresponding measurement target. The threshold value for temperature is set to the value based on the usable temperature range of equipment E3, which is the corresponding measurement target, at the measurement location surrounded by frame F3. be done.

Since the threshold value for each temperature of the measurement location is set as described above, when the temperature is measured for multiple measurement locations, the temperature thresholds set for the multiple measurement locations may have different values for each other. It can be. However, even if the temperature is measured at multiple measurement locations, the temperature threshold for one measurement location may be the same as the temperature threshold for another measurement location. . In one example, the determination unit 27 sets a threshold value for each temperature of the measurement location, for example, based on an operation input on the user interface 24 by a user of the temperature measurement system 1 or the like. In another example, a threshold value for each temperature of the measurement location is stored in the data storage unit 22, and the determination unit 27 sets the threshold value for each temperature of the measurement location to the value read from the data storage unit 22. do.

Further, a threshold value may be set as follows for one temperature at a measurement location. In one example, the determination unit 27 acquires a temporal change in temperature (time history) regarding one of the measurement locations. Then, the determination unit 27 sets a temperature threshold for the measurement location based on the temporal change in temperature. Further, the determination unit 27 may update (reset) the threshold value for temperature from a real-time value for one measurement location based on the change in temperature over time.

Further, the determination unit 27 may be able to set a plurality of values that are different from each other as a threshold value for one temperature at a measurement location. In this case, the determination unit 27 selects one of the plurality of values as the threshold based on the state of the equipment to be measured corresponding to the measurement location. For example, in setting a threshold value for one temperature at a measurement location, the determination unit 27 acquires information regarding whether or not equipment to be measured corresponding to the measurement location is operating. When the equipment corresponding to the measurement location is operating, the threshold value for the temperature of the measurement location is set to a higher value than when the equipment is not operating. Note that it is possible to similarly set threshold values for temperatures at other measurement locations.

The determination unit 27 determines whether the temperature (measured value of temperature) exceeds a threshold value for each of one or more measurement locations. That is, it is determined whether or not the temperature at any measurement location is below a set threshold. The notification information generation unit 28 acquires the measurement results regarding the temperature of each measurement location and the determination result of the determination unit 27 regarding the temperature of each measurement location. Then, the notification information generation unit 28 generates notification information based on the acquired measurement results and determination results, and causes the user interface 24 or the like to notify the generated notification information.

If the determination unit 27 determines that the temperature at any measurement location is below the threshold, the notification information generation unit 28 generates the temperature measurement results for each measurement location and the temperature at each measurement location. The determination result regarding whether or not is less than or equal to the threshold value is notified in the notification information. On the other hand, if it is determined that the temperature at any of the measurement points exceeds the threshold, the notification information generation unit 28 generates the temperature measurement result of each measurement point and the temperature of each measurement point below the threshold. In addition to the determination result as to whether or not the temperature exceeds the threshold value, warning information indicating the measurement location where the temperature exceeds the threshold value is notified in the notification information.

FIG. 4 shows an example of notification information generated by the notification information generation unit 28. In the example of FIG. 4, the notification information is displayed on the touch panel, display screen, or the like of the user interface 24. In the example of FIG. 4, similarly to the example of FIG. 3, in the image I1 taken by the camera 11, the temperature is specified as the measurement point. The notification information shows the measurement results of the temperatures at each of the three measurement locations and the determination result as to whether the temperature at each of the three measurement locations is equal to or lower than the threshold value. In the example of FIG. 4, the notification information indicates that the measured values of the temperatures at the measurement locations surrounded by frames F1, F2, and F3 are 100° C., 80° C., and 100° C., respectively.

In the example of FIG. 4, the threshold values are set to 110° C., 100° C., and 90° C., respectively, for the temperatures at measurement locations surrounded by frames F1, F2, and F3. In the notification information, the determination result by the determination unit 27 is that the temperature of the measurement location surrounded by frames F1 and F2 is below the threshold value, and the temperature of the measurement location surrounded by frame F3 exceeds the threshold value. It is shown that there is. Further, in the example of FIG. 4, the notification information includes warning information indicating that the temperature at the measurement location surrounded by the frame F3 exceeds the threshold value. In the example of FIG. 4, as warning information, a measurement location surrounded by a frame F3 in the photographed image I1 is shown in a color different from other parts, such as red. In addition, in FIG. 4, the measurement location surrounded by the frame F3, that is, the location where the equipment E3, which is the measurement target corresponding to the measurement location, is shown is indicated by red hatching. Further, the warning information may be notified by voice, lighting of a corresponding warning lamp, or the like.

FIG. 5 shows an example of a process performed by the process execution unit 21. The example process shown in FIG. 5 may be performed periodically, or may be performed based on operations on the user interface 24 or the like. When the process in the example of FIG. 5 is started, the processing execution unit 21, as described above, detects the intensity of infrared rays incident on the camera 11 from the photographing range A1 as the detection result of the temperature-related parameter in the photographing range A1. (S51). Then, the measurement point specifying section 25 of the processing execution section 21 specifies the temperature measurement point in the image taken by the camera 11 in the same manner as in any of the above-described examples (S52). Then, the temperature calculation unit 26 derives a temperature measurement value for each of the specified measurement locations in the same manner as in any of the above-described examples (S53). At this time, a calculated value calculated as described above based on the detection result of the intensity of infrared rays and related data, or a correction value obtained by correcting the calculated value as described above is derived as a measured value.

Then, the determination unit 27 determines whether the measured temperature value is equal to or less than the threshold value for each of the designated measurement locations (S54). The threshold value for each temperature of the measurement location is set in the same manner as in any of the examples described above. If the measured temperature value at any measurement location is below the threshold value (S54-Yes), the notification information generation unit 28 generates the temperature measurement result at each measurement location and the temperature at each measurement location below the threshold value. The determination result as to whether or not this is the case is notified in the notification information (S55). On the other hand, if the temperature measurement value exceeds the threshold at any measurement location (S54-No), the notification information generation unit 28 generates the temperature measurement result of each measurement location and the temperature measurement value of each measurement location. In addition to the determination result as to whether or not the temperature is below the threshold value, warning information indicating a measurement location where the temperature exceeds the threshold value is notified in the notification information. Note that the notification information is notified in the same manner as in any of the examples described above.

In this embodiment, the camera 11 detects the intensity of infrared rays incident on the camera 11 from the photographing range A1 as a parameter related to the temperature in the photographing range A1. Further, an illumination unit 12 that irradiates light is provided integrally with the camera 11. Since the camera 11 is integrated with the lighting unit 12, it is possible to obtain an overhead image showing multiple facilities by photographing with the camera 11, and temperature-related parameters can be detected in the photographing range A1 that includes multiple facilities. Become.

Further, in the present embodiment, the processing execution unit 21 specifies a measurement location where the temperature is to be measured in the image taken by the camera 11. Therefore, by having the processing execution unit 21 designate a location corresponding to the desired measurement target within the imaging range A1 as a measurement location in the captured image, the temperature of the desired measurement target within the imaging range A1 can be appropriately determined. becomes measurable. For example, when a photograph is taken by the camera 11 in a factory or the like, by having the processing execution unit 21 designate a location corresponding to a predetermined equipment within the photographing range A1 as a measurement location in the photographed image, the predetermined equipment can be temperature can be measured appropriately.

Furthermore, in the present embodiment, the processing execution unit 21 specifies a plurality of temperature measurement locations in the captured image of the camera 11. Therefore, it is possible to appropriately measure the temperature of each of the plurality of desired measurement targets within the photographing range A1. For example, it is assumed that the temperature is measured for each of a plurality of facilities arranged in the photographing range A1. By having the processing execution unit 21 designate locations corresponding to each of the plurality of facilities to be measured within the photographing range A1 as measurement locations in the photographed image, the temperature of each of the plurality of facilities within the photographing range A1 is determined. can be measured appropriately.

As described above, in this embodiment, by providing the camera 11 in a state where a plurality of measurement objects (a plurality of equipment) are located in the photographing range A1, one camera 11 is used to measure each of the plurality of measurement objects. Temperature can be measured. That is, it is possible to measure the temperature of each of a plurality of measurement objects without providing each of the plurality of measurement objects (a plurality of equipment) with one camera 11 that detects temperature-related parameters. Therefore, even when measuring the temperature of each of a plurality of measurement targets, the number of cameras 11 can be reduced. Thereby, even when measuring the temperature of each of a plurality of measurement targets, the system configuration of the temperature measurement system 1 does not become complicated, and the cost etc. of the temperature measurement system 1 can be reduced.

Furthermore, in the present embodiment, the processing execution unit 21 sets a corresponding threshold value for each temperature of the designated measurement location. Then, the processing execution unit 21 determines whether the temperature of each measurement location exceeds a threshold value. Therefore, for each temperature of the measurement location, an appropriate threshold value is set based on the usable temperature range of the corresponding equipment to be measured. Then, it is possible to determine whether or not the temperature is appropriate for the measurement target corresponding to each measurement location based on the appropriately set threshold value.

Further, in the present embodiment, the processing execution unit 21 issues a warning by, for example, notifying warning information when the temperature exceeds a threshold value at any of the specified measurement locations. As a result, the user of the temperature measurement system 1 can recognize that a temperature abnormality such as a fire has occurred in the equipment corresponding to any of the measurement locations, and also Based on the warning information, it becomes possible to recognize whether or not a problem has occurred. Therefore, it is possible to appropriately take safety measures including fire prevention measures in a place such as a factory where multiple pieces of equipment are arranged.

Furthermore, in this embodiment, by providing the camera 11 integrally with the illumination section 12, the camera 11 can be easily placed at a position where direct light from the illumination section 12 does not enter. Further, the camera 11 can be easily placed at a position where the reflected light from the irradiation range B1 does not enter, or at a position where the influence of the reflected light from the irradiation range B1 on the intensity of infrared rays incident on the camera 11 is determined. Become.

(Modified example)
Note that the temperature measurement system 1 may be provided with a plurality of cameras 11. In a first modification shown in FIG. 6, the temperature measurement system 1 is provided with a plurality of the above-described devices 13 in which the camera 11 and the illumination unit 12 are mounted. In this modification, two devices 13A and 13B are provided. In the device 13A, the camera 11A and the illumination section 12A are integrally provided, and in the device 13B, the camera 11B and the illumination section 12B are integrally provided. In the example of FIG. 6, the equipment E1 to E3 are arranged in the photographing range A1 by the camera 11A, and the positions where each of the equipment E1 to E3 is arranged are included in the light irradiation range B1 by the illumination unit 12A. The equipment E2 is also included in the photographing range A2 by the camera 11B and the light irradiation range B2 by the illumination unit 12B.

In this modification, the processing execution unit 21 of the processing device 10 acquires the detection result of the intensity of infrared rays incident on the camera 11A from the photographing range A1 as the detection result of the temperature-related parameter in the photographing range A1, and As a detection result of the temperature-related parameter in the range A2, a detection result of the intensity of infrared rays incident on the camera 11B from the photographing range A2 is obtained. Thereby, in this modification as well, it is possible to measure the temperature of a desired measurement target in each of the photographing ranges A1 and A2, similarly to any of the above-described embodiments.

For example, the processing execution unit 21 designates the locations where each of the equipment E1 and E3 is shown as the temperature measurement location in the image taken by the camera 11A, as in any of the above-described embodiments. Then, the processing execution unit 21 calculates the temperature at the measurement location where each of the equipment E1 and E3 is shown in the image taken by the camera 11A, based on the detection result of the intensity of infrared rays incident on the camera 11A from the photographing range A1. It can be measured in the same manner as in any of the embodiments.

Furthermore, in this modification, the equipment E2 is included in both the photographing range A1 of the camera 11A and the photographing range A2 of the camera 11B. Then, the processing execution unit 21 can calculate the temperature of the measurement location where the equipment E2 is shown in the image taken by the camera 11A, as described above, based on the detection result of the infrared ray intensity and the related data by the camera 11A. It is. Further, the processing execution unit 21 can calculate the temperature of the measurement location where the equipment E2 is shown in the image taken by the camera 11B as described above, based on the detection result of the infrared ray intensity and related data by the camera 11B. It is. Here, the equipment E2 is arranged at the end of the angle of view of the camera 11A, whereas it is arranged at the center of the angle of view of the camera 11B. Therefore, if the above-mentioned correction for the temperature of the measurement point based on the position of the measurement point in the captured image is not performed, the processing execution unit 21 corrects the temperature of the measurement location where the equipment E2 is shown in the captured image by the camera 11B. , is adopted as the measured value of the temperature of equipment E2. Further, it is determined whether or not the temperature at the measurement location where the equipment E2 is shown in the captured image by the camera 11B is equal to or higher than a threshold value.

Moreover, in a certain modification, devices 13A and 13B are provided, similar to the modification in FIG. Then, light from either of the illumination units 12A, 12B is reflected at the equipment E2. The reflected light from the equipment E2 enters the camera 11A, but does not enter the camera 11B. In this modification, if the above-mentioned correction for the temperature of the measurement location that excludes the influence of reflected light incident on the camera 11A is not performed, the processing execution unit 21 performs the measurement in which the equipment E2 is shown in the image taken by the camera 11B. The temperature at the location is adopted as the measured value of the temperature of the equipment E2. Further, it is determined whether or not the temperature at the measurement location where the equipment E2 is shown in the captured image by the camera 11B is equal to or higher than a threshold value.

In the first modified example as well, the processing execution unit 21 specifies the measurement location where the temperature is to be measured in each of the captured images of the cameras 11A and 11B. For this reason, by having the processing execution unit 21 designate a location corresponding to a desired measurement target in each of the imaging ranges A1 and A2 as a measurement location in the image taken by the corresponding one of the cameras 11A and 11B, the imaging range It becomes possible to appropriately measure the temperature of a desired measurement target in each of A1 and A2. That is, even in the first modification, etc., the same operation and effect as in the above-described embodiment, etc. can be achieved.

Furthermore, in a second modification shown in FIG. 7, the camera 11 and the illumination unit 12 are provided separately from each other. However, in this modification, the illumination unit 12 is placed near the camera 11. Since the camera 11 is arranged near the illumination unit 12, in this modification as well, it is possible to obtain an overhead image showing a plurality of measurement targets (a plurality of equipment) by photographing with the camera 11. In the included shooting range A1, parameters related to temperature can be detected.

Further, in this modification as well, the processing execution unit 21 specifies the measurement location where the temperature is to be measured in the image taken by the camera 11. Therefore, by having the processing execution unit 21 designate a location corresponding to the desired measurement target within the imaging range A1 as a measurement location in the captured image, the temperature of the desired measurement target within the imaging range A1 can be appropriately determined. becomes measurable. In other words, the second modification etc. also have the same operation and effect as the above-described embodiment etc.

Note that when the camera 11 is separate from the illumination unit 12 as in the second modification, the camera 11 does not necessarily need to be placed on the ceiling wall 17. In a modification, the camera 11 is arranged at the vertically upper end of the side wall of the space 16. However, in this case as well, the illumination unit 12 is arranged near the camera 11 on the ceiling wall 17.

Further, in the embodiments described above, the camera 11 detects parameters related to the temperature in the photographing range A1, but in a certain modification, the camera 11 may be configured to detect the temperature in the photographing range A1. In this case, the processing execution unit 21 acquires the temperature detection result in the photographing range A1 by the camera 11. In this modification, the camera 11 includes a built-in processor or integrated circuit that performs image processing. Information about the intensity of infrared rays incident on the camera 11 from the photographing range A1 is converted into information about the temperature of the photographing range A1 through image processing by the processor of the camera 11 and the like. In this modification, the processor or the like of the camera 11 obtains, for example, the intensity of infrared rays incident on the camera 11 from a corresponding location in the photographing range A1 for each pixel of the photographed image. Then, the processor or the like of the camera 11 calculates the temperature for each pixel of the captured image based on the intensity of the acquired infrared rays.

Furthermore, in the above-described embodiments, the processing by the processing execution unit 21 is performed by a processor or integrated circuit of a computer or the like that is separate from the camera 11 and the lighting unit 12, or by a virtual processor in a cloud environment. It is not limited to. In a third modification shown in FIG. 8, a processor or an integrated circuit that performs the above-described processing by the processing execution section 21 is mounted on the temperature measurement device 8 in which the camera 11 and the illumination section 12 are mounted. Also in this modification, the camera 11 is provided integrally with the illumination section 12. Then, the processing execution unit 21 specifies a measurement location where the temperature is to be measured in the image taken by the camera 11. Therefore, by having the processing execution unit 21 designate a location corresponding to the desired measurement target within the imaging range A1 as a measurement location in the captured image, the temperature of the desired measurement target within the imaging range A1 can be appropriately determined. becomes measurable. In other words, the third modification etc. also have the same operation and effect as the above-described embodiment etc.

In the example of FIG. 8, a storage medium serving as the data storage unit 22 is installed in the temperature measurement device 8, but the processing execution unit 21 stores data, algorithms, etc. used for processing separately from the temperature measurement device 8. The information may be obtained from a storage medium installed in a computer or the like. Further, in the example shown in FIG. 8, the user interface 24 is provided separately from the temperature measuring device 8, but the user interface 24 may be installed in the temperature measuring device 8.

According to at least one of these embodiments, the illumination unit is provided integrally with the camera or in the vicinity of the camera. Then, a temperature measurement location is specified in the image taken by the camera. Thereby, it is possible to provide a temperature measurement system, a temperature measurement device, and a temperature measurement method that can appropriately measure the temperature of a desired measurement target within a shooting range.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

DESCRIPTION OF SYMBOLS 1... Temperature measurement system, 8... Temperature measurement device, 10... Processing device, 11 (11A, 11B)... Camera, 12 (12A, 12B)... Illumination section, 21... Process execution section, 25... Measurement point designation section, 26 ...Temperature calculation section, 27... Judgment section, 28... Notification information generation section, A1, A2... Shooting range, B1, B2... Irradiation range.

Claims (6)

a camera that detects either temperature or a parameter related to the temperature in a photographing range by photographing;
an illumination unit that irradiates light and is provided integrally with the camera or in the vicinity of the camera;
a processing execution unit that specifies the temperature measurement location in the captured image of the camera;
A temperature measurement system equipped with 2. The temperature measurement system according to claim 1, wherein the processing execution unit specifies a plurality of locations where the temperature is measured in the image taken by the camera. 2. The processing execution unit sets a corresponding threshold value for each of the temperatures of the specified measurement locations, and determines whether the temperature of each of the measurement locations exceeds the threshold value. temperature measurement system. 4. The temperature measurement system according to claim 3, wherein the processing execution unit issues a warning when the temperature exceeds the threshold value at any of the designated measurement locations. a camera that detects either temperature or a parameter related to the temperature in a photographing range by photographing;
an illumination unit that irradiates light and is provided integrally with the camera;
a processing execution unit that specifies the temperature measurement location in the captured image of the camera;
A temperature measuring device comprising: detecting either the temperature in the photographing range of the camera or a parameter related to the temperature by photographing with a camera;
irradiating light from an illumination unit provided integrally with the camera or in the vicinity of the camera;
specifying the temperature measurement location in the captured image of the camera;
A temperature measurement method comprising: