JP2018082405A - Processor switching apparatus, monitoring camera, processor switching method, control program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of suitably suppressing concentration of processing on one processor.SOLUTION: A processor switching device (15) includes: a switching unit (21) for switching a processor to be operated among a plurality of processors with reference to a switching condition; an acquisition unit (19) for acquiring reference information; and a setting unit (20) for setting the switching condition in accordance with the reference information acquired by the acquisition unit.SELECTED DRAWING: Figure 1

Description

  One embodiment of the present invention relates to a processor switching device for switching a processor to be operated among a plurality of processors.

  For example, when a recording process (4K3K encoding process or the like) and an image analysis process are executed in an external temperature environment corresponding to the upper limit of the operating temperature range in a surveillance camera, the chip internal temperature (hereinafter referred to as CPU) of the CPU that executes these processes Temperature) reaches the upper limit of the allowable temperature. Therefore, in order to lower the CPU temperature to an allowable range, there is a method of forcibly lowering the clock frequency by applying a CPU performance limit to limit the clock frequency to the CPU.

  However, in this method, when the CPU clock frequency is lowered, the CPU performance (processing capability) for executing both the recording process and the image analysis process cannot be ensured. For this reason, in order to constantly execute the operations required for the surveillance camera (recording process and image analysis process), it is not possible to apply CPU performance limitation (a function to suppress heat generation) as a countermeasure against heat generation.

  Conventional techniques that can be generally applied as a countermeasure to replace the above-described CPU performance limitation are shown below. For example, Patent Document 1 discloses a method for suppressing a temperature rise of a CPU in a printing apparatus including a plurality of CPUs. In the second control mode, the printing apparatus switches the CPU to be operated before the CPU temperature exceeds the upper limit value. By doing so, the CPU is given a pause period, and as a result, the CPU temperature does not exceed the upper limit value, and the necessary CPU performance can be ensured.

  In Patent Document 2, the frequency of occurrence of the next operation by the user is stored, the frequency of occurrence is updated based on the elapsed time, and the power supply mode to the multi-core processor is switched based on the frequency of occurrence after the update. A multi-core processor system is disclosed.

JP 2013-86404 A (published on May 13, 2013) Patent No. 5459393 (registered on January 24, 2014)

  When the above-mentioned CPU performance restriction is applied, there is an effect that the operation of the CPU in a high temperature state can be continued. On the other hand, as in the inventions described in Patent Documents 1 and 2, in the case of a system equipped with a plurality of CPUs, the operation time of each CPU can be reduced by switching the CPU to be operated. Thereby, there is another effect that it is possible to extend the product life as a CPU component by suppressing thermal deterioration due to heat generated by the operation.

  However, in the technology of switching the CPU to be operated when the CPU temperature exceeds a preset upper limit value, for example, in the case of a surveillance camera having a plurality of CPUs, the surveillance camera is usually installed outdoors. The CPU temperature is affected by the surrounding environment at the place where the CPU is installed, and the technology may not be applicable. For example, depending on the installation location, time zone, or season, the temperature in the surrounding environment may be low, and the CPU temperature may not exceed a preset upper limit value. Therefore, when the above-described conventional technology is applied to the CPU of the monitoring camera as it is, the CPU switching operation does not occur in an environment where the CPU temperature does not exceed the preset upper limit value. In such an environment, the processing is concentrated on one CPU, and the operation time of the CPU cannot be reduced. This is a problem that can occur in processors other than the CPU as well.

  One embodiment of the present invention has been made in view of the above-described problems, and a main object thereof is to provide a technique capable of suitably suppressing processing concentration on one processor.

  In order to solve the above-described problem, a processor switching device according to an aspect of the present invention is a processor switching device that switches a processor to be operated among a plurality of processors, and refers to the switching condition. Among these, a switching unit that switches a processor to be operated, an acquisition unit that acquires reference information, and a setting unit that sets the switching condition according to the reference information acquired by the acquisition unit are provided.

  In order to solve the above-described problem, a processor switching method according to an aspect of the present invention is a processor switching method for switching a processor to be operated among a plurality of processors. Among these, the switching process which switches the processor to operate | move, the acquisition process which acquires reference information, and the setting process which sets the said switching condition according to the reference information acquired at the said acquisition process are included.

  According to one embodiment of the present invention, processing concentration on one processor can be suitably suppressed.

It is a block diagram which shows the structure of the surveillance camera system containing the processor switching apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the example of arrangement | positioning of 1st CPU and 2nd CPU with which the surveillance camera which concerns on Embodiment 1 of this invention is provided. It is a flowchart explaining the processor switching method which the processor switching apparatus which concerns on Embodiment 1 of this invention performs. It is a figure for demonstrating the processor switching method which the processor switching apparatus which concerns on Embodiment 1 of this invention performs. It is a block diagram which shows the structure of the surveillance camera system containing the processor switching apparatus which concerns on Embodiment 2 of this invention. It is a flowchart explaining the processor switching method which the processor switching apparatus which concerns on Embodiment 2 of this invention performs. It is a block diagram which shows the structure of the surveillance camera system containing the processor switching apparatus which concerns on Embodiment 3 of this invention. It is a flowchart explaining the processor switching method which the processor switching apparatus concerning Embodiment 3 of this invention performs. It is a block diagram which shows the structure of the surveillance camera system containing the processor switching apparatus which concerns on Embodiment 4 of this invention. It is a flowchart explaining the processor switching method which the processor switching apparatus which concerns on Embodiment 4 of this invention performs. It is a block diagram which shows the structure of the surveillance camera system containing the surveillance camera which concerns on the modification of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiment, an example in which the processor switching device according to one embodiment of the present invention is applied to a surveillance camera is described. However, the processor switching device according to one embodiment of the present invention includes a plurality of processors. The present invention can also be applied to other electronic devices including the above. Further, in the following embodiment, an example in which the processor switched by the processor switching device according to the embodiment of the present invention is two CPUs is described. However, the processor switched by the processor switching device according to the embodiment of the present invention. May be a processor other than the CPU. Further, the processor switching device according to the embodiment of the present invention may switch a processor to be operated among three or more processors.

  Further, in this embodiment, the processor switching method according to one embodiment of the present invention is executed by the processor switching device itself, but the processor itself that is the target for switching the processor to be operated (in this embodiment, the first CPU 7 and The second CPU 8) may do this. In that case, the operating CPU executes the processor switching method by operating the inactive CPU.

Embodiment 1
(Monitoring camera system 1)
A surveillance camera system 1 according to the present embodiment will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the surveillance camera system 1. As shown in FIG. 1, the surveillance camera system 1 includes a surveillance camera 2, a wireless LAN access point 3, a server 4, and an image recording device 5.

  The surveillance camera 2 captures the surroundings of its own device, and transmits the captured images (including still images and moving images) to the wireless LAN access point 3 via the wireless LAN. The wireless LAN access point 3 receives the moving image transmitted from the surveillance camera 2 and transmits it to the server 4 and the image recording device 5 via the LAN. The server 4 records and stores the image transmitted from the wireless LAN access point 3 in its own device. Further, the server 4 may transmit the stored image to a device (not shown) other than its own device in response to a transmission request from the device. Similarly, the image recording apparatus 5 records and stores the image transmitted from the wireless LAN access point 3 in its own apparatus.

  In this embodiment, the monitoring camera 2 transmits the captured image to the server 4 and the image recording device 5 via the wireless LAN and the wireless LAN access point 3, but the monitoring camera 2 transmits the image. The method is not limited to this. For example, the monitoring camera 2 may transmit the captured image to the server 4 and the image recording device 5 via a mobile phone line, a wired LAN, or the Internet.

(Monitoring camera 2)
The surveillance camera 2 according to the present embodiment will be described in more detail with reference to FIG. As shown in FIG. 1, the surveillance camera 2 includes a photographing unit 6, a first CPU 7, a second CPU 8, a first memory 9, a second memory 10, a first power supply unit 11, a second power supply unit 12, a first wireless unit 13, A second wireless unit 14 and a processor switching device 15 are provided.

  The photographing unit 6 photographs the surroundings of the surveillance camera 2 and transmits the photographed image to the operating CPU of either the first CPU 7 or the second CPU 8. The first CPU 7 and the second CPU 8 execute a recording process, an image analysis process, a face recognition collation process, an image cut-out process, or the like on the image transmitted from the photographing unit 6. The first memory 9 and the second memory 10 are operation memories for the first CPU 7 and the second CPU 8 to perform processing, respectively.

  The 1st power supply part 11 and the 2nd power supply part 12 supply the electric power for operation | movement to 1st CPU7 and 2nd CPU8, respectively. The first wireless unit 13 and the second wireless unit 14 transmit the image data processed by the first CPU 7 and the second CPU 8 to the wireless LAN access point 3 via the wireless LAN, respectively. The processor switching device 15 switches a CPU to be operated among the first CPU 7 and the second CPU 8.

(Examples of processes executed by the first CPU 7 and the second CPU 8)
For example, as an example of the recording process executed by the first CPU 7 and the second CPU 8, the resolution is 12M pixels and the image compression method is H.264. H.264 recording process. When the first CPU 7 and the second CPU 8 execute such a recording process, it is possible to record a clear image with high resolution. However, since the load on the CPU is large, the CPU temperature tends to increase.

  An example of the image analysis process executed by the first CPU 7 and the second CPU 8 is a process of adding meaning to image data by analyzing the movement of a person or an object. When the first CPU 7 and the second CPU 8 execute such image analysis processing, it is possible to detect passage of a person, entry of a person, movement of an object, and the like.

  Further, as an example of the face recognition / collation process executed by the first CPU 7 and the second CPU 8, there is a process of automatically detecting a human face and collating with data on the server. When the first CPU 7 and the second CPU 8 execute such face recognition / collation processing, a suspicious person can be monitored.

  Moreover, as an example of the image cut-out process executed by the first CPU 7 and the second CPU 8, there is a process of cutting out a specific area in the image taken by the photographing unit 6 in the store. When the first CPU 7 and the second CPU 8 execute such image cut-out processing and it is necessary to monitor the entrance of the store intensively, in the image taken by the photographing unit 6 in the store, an image near the entrance of the store And the cut-out image can be transmitted as independent image data.

(Example of arrangement of first CPU 7 and second CPU 8)
An arrangement example of the first CPU 7 and the second CPU 8 will be described with reference to FIG. 2A and 2B show examples of arrangement of the first CPU 7 and the second CPU 8, respectively. 2A and 2B show top views of the respective arrangement examples, and the lower stage shows side views of the respective arrangement examples.

  As shown in the arrangement example of FIG. 2A, the first CPU 7 and the second CPU 8 are installed on the substrate 22 at a predetermined distance L or more from each other. Here, the predetermined distance L is a distance such that the heat generated from the first CPU does not affect the CPU temperature of the second CPU, and the heat generated from the second CPU does not affect the CPU temperature of the first CPU.

  By adopting the arrangement of CPUs as described above, it is possible to prevent heat from being generated by each CPU on a substrate having a plurality of CPUs, and to suppress an increase in CPU temperature. Can do.

  In another arrangement example, as shown in the arrangement example of FIG. 2B, the first CPU 7 is installed on a surface opposite to the surface of the substrate 22 on which the second CPU 8 is installed. In the case of a configuration including three or more CPUs, the three or more CPUs are divided into two groups, and the first group is opposite to the surface of the substrate 22 on which the second group is installed. It may be installed on the surface.

  By adopting the CPU arrangement as described above, the first CPU 7 (or the first group) and the second CPU 8 (or the second group) are isolated from each other via the substrate. It is possible to prevent heat from being generated, and to prevent the CPU temperature from rising.

(Processor switching device 15)
The processor switching device 15 according to the present embodiment will be described in more detail with reference to FIG. As shown in FIG. 1, the processor switching device 15 includes a temperature measurement unit 16, a time measurement unit 17, and a control unit 18. The control unit 18 includes an acquisition unit 19, a setting unit 20, and a switching unit 21.

  The temperature measurement unit 16 measures the temperatures of the first CPU 7 and the second CPU 8 and transmits them to the control unit 18. In FIG. 1, the temperature measurement unit 16 is outside the first CPU 7 and the second CPU 8, but the temperature measurement unit 16 may be built in the first CPU 7 and the second CPU 8. The time measurement unit 17 measures the current time and transmits it to the control unit 18.

  The acquisition unit 19 acquires the current time measured by the time measurement unit 17 as reference information. Note that the reference information acquired by the acquisition unit 19 indicates information by which the environment around the monitoring camera 2 can be estimated by referring to the information. For example, the reference information may be information with which the temperature in the environment around the monitoring camera 2 can be estimated by referring to the information. Examples of the information include current time, date, altitude and wind speed.

  The setting unit 20 sets a switching condition according to the reference information acquired by the acquisition unit 19. The switching condition indicates a condition for switching the CPU to be operated among the first CPU 7 and the second CPU 8 when the condition is satisfied. In addition, the switching unit 21 refers to the switching condition set by the setting unit 20 and switches the processor to be operated among the first CPU 7 and the second CPU 8.

(Processor switching method)
A processor switching method by the processor switching device 15 according to the present embodiment will be described in detail with reference to FIG. FIG. 3 is a flowchart for explaining an example of a processor switching method by the processor switching device 15 according to the present embodiment. Each step shown in FIG. 3 may be started when the monitoring camera 2 provided with the processor switching device 15 is activated, or may be started when the processor switching device 15 is activated alone. You can start at the timing.

  First, the switching unit 21 operates one of the first CPU 7 and the second CPU 8 (step S0). Then, the time measuring unit 17 measures the current time, and the acquiring unit 19 acquires the current time (reference information) measured by the time measuring unit 17 from the time measuring unit 17 (step S1). Note that the acquisition unit 19 may acquire the current time from the outside instead of from the time measurement unit 17.

  Next, the setting unit 20 determines from the current time acquired by the acquisition unit 19 whether or not the environment outside the monitoring camera 2 (hereinafter, the external environment) is daytime (step S2). When the setting unit 20 determines that the external environment is daytime (YES in step S2), the process proceeds to step S3. When the setting unit 20 determines that the external environment is not daytime (NO in step S2), the process proceeds to step S9 described later. Note that the current time at which the setting unit 20 determines that the external environment is daytime from the current time is preferably a time in a time zone during which the temperature tends to increase during the day and can affect the CPU temperature.

  In the step S3, the setting unit 20 sets the switching condition to a condition that the CPU temperature of the operating CPU (first CPU 7 or second CPU 8) measured by the temperature measuring unit 16 exceeds a predetermined temperature (hereinafter referred to as a threshold). Set. Then, the setting unit 20 sets the threshold value (step S4). Note that the CPU temperature threshold set by the setting unit 20 is preferably a temperature at which the CPU processing speed is significantly reduced when the CPU temperature exceeds the threshold.

  Next, the CPU temperature of the CPU (first CPU 7 or second CPU 8) in which the temperature measurement unit 16 is operating is measured, and the switching unit 21 determines whether the CPU temperature of the operating CPU measured by the temperature measurement unit 16 has exceeded a threshold value. It is determined whether or not (step S5). When it is determined that the CPU temperature has exceeded the threshold (YES in step S5), the switching unit 21 switches the CPU to be operated (step S6). When the switching unit 21 determines that the CPU temperature does not exceed the threshold value (NO in step S5), the process proceeds to step S7. Note that in the present embodiment, the switching unit 21 switches the CPU to be operated to the CPU that is out of two CPUs. On the other hand, in the case of a configuration in which three or more CPUs are provided and the switching unit 21 switches the CPU to be operated among the three or more CPUs, the switching unit 21 is the most recent consecutive among the three or more CPUs. It is preferable to switch the CPU to be operated to the CPU having the longest pause time.

  FIG. 4 is a diagram showing the operation of the first CPU 7 and the second CPU and the CPU temperature of the first CPU 7 in the processes of steps S5 and S6, and the upper part is a graph schematically showing the operation state of the first CPU 7 and the second CPU 8 The vertical axis indicates whether or not it is operating, and the horizontal axis indicates time. The lower part of FIG. 4 is a graph showing the elapsed time of the CPU temperature of the first CPU 7, the vertical axis shows the CPU temperature of the first CPU 7, and the horizontal axis shows the time. As shown in FIG. 4, when the first CPU 7 is operating, the CPU temperature of the first CPU 7 rises. When the CPU temperature of the first CPU 7 exceeds the threshold A, the operating CPU is switched from the first CPU 7 to the second CPU 8, and the CPU temperature of the first CPU 7 decreases.

  In step S7, the time measurement unit 17 measures the current time, and the acquisition unit 19 acquires the current time (reference information) measured by the time measurement unit 17 from the time measurement unit 17. Then, the setting unit 20 determines whether or not the external environment is nighttime from the current time acquired by the acquisition unit 19 (step S8). Here, night refers to a time period that is not the daytime period described above. When the setting unit 20 determines that the external environment is nighttime (YES in step S8), the process proceeds to step S9. If the setting unit 20 determines that the external environment is not nighttime (NO in step S8), the process returns to step S5, and steps S5 to S8 are performed until the setting unit 20 determines that the external environment is nighttime. repeat.

  Step S9 described above will be described. In step S9, the setting unit 20 sets the switching condition such that the current time measured by the time measuring unit 17 passes a predetermined time (hereinafter referred to as switching time). Then, the setting unit 20 sets the switching time (step S10). Note that the switching time set by the setting unit 20 is an arbitrary time, and may include only one time or a plurality of times.

  Next, the time measuring unit 17 measures the current time, and the switching unit 21 determines whether or not the current time measured by the time measuring unit 17 has passed the switching time (step S11). When it is determined that the current time has passed the switching time (YES in step S11), the switching unit 21 switches the CPU to be operated (step S12). When the switching unit 21 determines that the current time has not passed the switching time (NO in step S11), the process proceeds to step S13. The current time referred to by the setting unit 20 to determine whether or not the current time has passed the switching time may not be the time measured by the time measuring unit 17 and may be acquired from outside the processor switching device 15. It may be the time.

  In step S13, the time measuring unit 17 measures the current time, and the acquiring unit 19 acquires the current time (reference information) measured by the time measuring unit 17 from the time measuring unit 17. Then, the setting unit 20 determines whether or not the external environment is daytime from the current time acquired by the acquisition unit 19 (step S14). When the setting unit 20 determines that the external environment is daytime (YES in step S14), the process proceeds to step S3. If the setting unit 20 determines that the external environment is not daytime (NO in step S14), the process returns to step S11, and steps S11 to S14 are performed until the setting unit 20 determines that the external environment is daytime. repeat.

  As described above, the processor switching device 15 according to the present embodiment acquires reference information, sets a switching condition according to the reference information, refers to the switching condition, and among the plurality of processors, Switch the processor to run. In this configuration, it is possible to set a switching condition based on the influence of the surrounding environment on the CPU temperature by recognizing the surrounding environment based on the reference information. As a result, even if the processor to be operated cannot be switched due to the influence of the surrounding environment, the processor can be switched. Therefore, it is possible to prevent the processing from being concentrated on a specific processor, and to reduce the operation time of the CPU. Then, CPU degradation due to heat can be suppressed and the product life of the CPU can be extended by the reduced operating time.

  More specifically, the processor switching device 15 according to the present embodiment acquires the current time as reference information, and when the current time indicates daytime, the switching condition is determined based on the temperature of the operating processor. The condition is set to exceed a predetermined temperature, and when the current time indicates night, the switching condition is set to a condition that the current time passes a predetermined time. Thereby, in the daytime when the temperature tends to be high, the processor to be operated can be switched according to the temperature of the processor, and in the nighttime when the temperature is likely to be low, the processor to be operated can be switched according to the current time. Thereby, even if it is a case where the processor to operate cannot be switched by the influence of low temperature at night, a processor can be switched.

[Embodiment 2]
The following describes Embodiment 2 of the present invention with reference to the drawings. The surveillance camera system 30 according to the present embodiment has the same configuration as that of the surveillance camera system 1 according to the first embodiment, except that the processor switching device 32 includes a date measurement unit 33. Therefore, for convenience of explanation, members other than the processor switching device 32 including the date measurement unit 33 and members having the same functions as the members included in the processor switching device 15 described in the first embodiment are as follows. The same reference numerals are given and explanations thereof are omitted.

(Processor switching device 32)
The processor switching device 32 according to the present embodiment will be described with reference to FIG. FIG. 5 is a block diagram illustrating a configuration of a monitoring camera system 30 including the monitoring camera 31 including the processor switching device 32 according to the present embodiment. As illustrated in FIG. 5, the processor switching device 32 further includes a date measurement unit 33 in addition to the configuration of the processor switching device 15 according to the first embodiment.

  The date measuring unit 33 measures the date and transmits it to the control unit 18.

(Processor switching method)
A processor switching method by the processor switching device 32 according to the present embodiment will be described with reference to FIG. FIG. 6 is a flowchart for explaining an example of a processor switching method by the processor switching device 32 according to the present embodiment. Note that detailed description of the same steps as those of the processor switching method according to the first embodiment will be omitted.

  First, the switching unit 21 operates one of the first CPU 7 and the second CPU 8 (step S20). Then, the date measuring unit 33 measures the date, and the acquiring unit 19 acquires the date (reference information) measured by the date measuring unit 33 from the date measuring unit 33 (step S21). Note that the acquisition unit 19 may acquire the date from the outside instead of from the date measurement unit 33.

  Next, the setting unit 20 determines whether or not the season is the summer season from the current time acquired by the acquisition unit 19 (step S22). When the setting unit 20 determines that the season is summer (YES in step S22), the process proceeds to step S23. When the setting unit 20 determines that the season is not summer (NO in step S22), the process proceeds to step S29 described later. Note that the date that the setting unit 20 determines from the date that the season is summer is preferably a date in a period during which the temperature tends to be high and can affect the CPU temperature.

  In the step S23, the setting unit 20 sets the switching condition to a condition that the CPU temperature of the operating CPU (first CPU 7 or second CPU 8) measured by the temperature measuring unit 16 exceeds a predetermined temperature (hereinafter referred to as a threshold). Set. Then, the setting unit 20 sets the threshold value (step S24).

  Next, the temperature measurement unit 16 measures the CPU temperature of the operating CPU (first CPU 7 or second CPU 8), and the switching unit 21 determines that the CPU temperature of the operating CPU measured by the temperature measurement unit 16 exceeds the threshold value. It is determined whether or not (step S25). When it is determined that the CPU temperature has exceeded the threshold (YES in step S25), the switching unit 21 switches the CPU to be operated (step S26). When the switching unit 21 determines that the CPU temperature does not exceed the threshold value (NO in step S25), the process proceeds to step S27.

  In step S27, the date measurement unit 33 measures the date, and the acquisition unit 19 acquires the date (reference information) measured by the date measurement unit 33 from the date measurement unit 33. And the setting part 20 determines whether a season is winter season from the date which the acquisition part 19 acquired (step S28). Here, the winter season indicates a period that is not the above-described summer period. If the setting unit 20 determines that the season is winter (YES in step S28), the process proceeds to step S29. If the setting unit 20 determines that the season is not winter (NO in step S28), the process returns to step S25, and steps S25 to S28 are repeated until the setting unit 20 determines that the season is winter.

  Step S29 described above will be described. In step S29, the setting unit 20 sets the switching condition such that the current time measured by the time measuring unit 17 passes a predetermined time (hereinafter referred to as switching time). Then, the setting unit 20 sets the switching time (step S30).

  Next, the time measuring unit 17 measures the current time, and the switching unit 21 determines whether or not the current time measured by the time measuring unit 17 has passed the switching time (step S31). When it is determined that the current time has passed the switching time (YES in step S31), the switching unit 21 switches the CPU to be operated (step S32). When the switching unit 21 determines that the current time has not passed the switching time (NO in step S31), the process proceeds to step S33.

  In step S <b> 33, the date measurement unit 33 measures the date, and the acquisition unit 19 acquires the date (reference information) measured by the date measurement unit 33 from the date measurement unit 33. Then, the setting unit 20 determines whether or not the season is summer from the date acquired by the acquisition unit 19 (step S34). When the setting unit 20 determines that the season is summer (YES in step S34), the process proceeds to step S23. If the setting unit 20 determines that the season is not summer (NO in step S34), the process returns to step S31, and steps S31 to S34 are repeated until the setting unit 20 determines that the season is summer.

  As described above, the processor switching device 32 according to the present embodiment acquires a date as reference information, and when the date indicates summer, the switching condition is set so that the temperature of the operating processor exceeds a predetermined temperature. When the date indicates winter season, the switching condition is set such that the current time passes a predetermined time. Thus, in the summer when the temperature tends to be high, the processor to be operated can be switched according to the temperature of the processor, and in the winter when the temperature is likely to be low, the processor to be operated can be switched according to the current time. Thereby, even if it is a case where the processor to operate cannot be switched by the influence of the low temperature of winter, a processor can be switched.

[Embodiment 3]
Embodiment 3 of the present invention will be described below with reference to the drawings. The surveillance camera system 40 according to the present embodiment has the same configuration as that of the surveillance camera system 1 according to the first embodiment, except that the processor switching device 42 includes an altitude measuring unit 43. Therefore, for convenience of explanation, members other than the processor switching device 42 including the altitude measuring unit 43 and members having the same functions as the members included in the processor switching device 15 described in the first embodiment are as follows. The same reference numerals are given and explanations thereof are omitted.

(Processor switching device 42)
The processor switching device 42 according to the present embodiment will be described with reference to FIG. FIG. 7 is a block diagram illustrating a configuration of a monitoring camera system 40 including the monitoring camera 41 including the processor switching device 42 according to the present embodiment. As illustrated in FIG. 7, the processor switching device 42 further includes an altitude measuring unit 43 in addition to the configuration of the processor switching device 15 according to the first embodiment.

  The altitude measuring unit 43 measures the altitude of the place where the monitoring camera 41 is installed (hereinafter, “installation place”), and transmits it to the control unit 18.

(Processor switching method)
A processor switching method by the processor switching device 42 according to the present embodiment will be described with reference to FIG. FIG. 8 is a flowchart for explaining an example of a processor switching method by the processor switching device 42 according to the present embodiment. Note that detailed description of the same steps as those of the processor switching method according to the first embodiment will be omitted.

  First, the switching unit 21 operates one of the first CPU 7 and the second CPU 8 (step S40). Then, the altitude measuring unit 43 measures the altitude, and the acquiring unit 19 acquires the altitude (reference information) measured by the altitude measuring unit 43 from the altitude measuring unit 43 (step S41). The acquiring unit 19 may acquire the altitude from the outside instead of from the altitude measuring unit 43.

  Next, the setting unit 20 determines whether or not the installation location is a lowland from the altitude acquired by the acquisition unit 19 (step S42). When the setting unit 20 determines that the installation location is low (YES in step S42), the process proceeds to step S43. When the setting unit 20 determines that the installation location is not low (NO in step S42), the process proceeds to step S49 described later. Note that the altitude at which the setting unit 20 determines that the installation location is low from the altitude is preferably an altitude at a location where the temperature tends to be high and can affect the CPU temperature.

  In the step S43, the setting unit 20 sets the switching condition to a condition that the CPU temperature of the operating CPU (the first CPU 7 or the second CPU 8) measured by the temperature measuring unit 16 exceeds a predetermined temperature (hereinafter referred to as a threshold). Set. Then, the setting unit 20 sets the threshold value (step S44).

  Next, the temperature measuring unit 16 measures the CPU temperature of the operating CPU (first CPU 7 or second CPU 8), and the switching unit 21 is the operating CPU (first CPU 7 or second CPU 8) measured by the temperature measuring unit 16. It is determined whether the CPU temperature has exceeded a threshold value (step S45). When it is determined that the CPU temperature has exceeded the threshold (YES in step S45), the switching unit 21 switches the CPU to be operated (step S46). When the switching unit 21 determines that the CPU temperature does not exceed the threshold value (NO in step S45), the process proceeds to step S47.

  In step S47, the altitude measuring unit 43 measures the altitude, and the acquiring unit 19 acquires the altitude (reference information) measured by the altitude measuring unit 43 from the altitude measuring unit 43. And the setting part 20 determines whether the installation place is a highland from the height which the acquisition part 19 acquired (step S48). In addition, the highland here shows the place which is not the place of the above-mentioned lowland. When the setting unit 20 determines that the installation location is low (YES in step S48), the process proceeds to step S49. If the setting unit 20 determines that the installation location is not highland (NO in step S48), the process returns to step S45, and steps S45 to S48 are performed until the setting unit 20 determines that the installation location is highland. repeat.

  Step S49 described above will be described. In step S49, the setting unit 20 sets the switching condition such that the current time measured by the time measuring unit 17 passes a predetermined time (hereinafter referred to as switching time). Then, the setting unit 20 sets the switching time (step S50).

  Next, the time measuring unit 17 measures the current time, and the switching unit 21 determines whether or not the current time measured by the time measuring unit 17 has passed the switching time (step S51). When it is determined that the current time has passed the switching time (YES in step S51), the switching unit 21 switches the CPU to be operated (step S52). When the switching unit 21 determines that the current time has not passed the switching time (NO in step S51), the process proceeds to step S53.

  In step S53, the altitude measuring unit 43 measures the altitude, and the acquiring unit 19 acquires the altitude (reference information) measured by the altitude measuring unit 43 from the altitude measuring unit 43. And the setting part 20 determines whether the installation place is a lowland from the height which the acquisition part 19 acquired (step S54). When the setting unit 20 determines that the installation location is low (YES in step S54), the process proceeds to step S53. If the setting unit 20 determines that the installation location is not lowland (NO in step S54), the process returns to step S51, and the steps S51 to S54 are performed until the setting unit 20 determines that the installation location is lowland. repeat.

  As described above, the processor switching device 42 according to the present embodiment acquires an altitude as reference information, and when the altitude indicates a lowland, the switching condition is set so that the temperature of the operating processor exceeds a predetermined temperature. When the altitude indicates a high altitude, the switching condition is set to a condition that the current time passes a predetermined time. Thereby, in the lowland where the temperature tends to be high, the processor to be operated can be switched according to the temperature of the processor, and in the highland where the temperature is likely to be low, the processor to be operated can be switched according to the current time. Thereby, even if it is a case where the processor to operate cannot be switched by the influence of the low temperature of a high altitude, a processor can be switched.

[Embodiment 4]
Embodiment 4 of the present invention will be described below with reference to the drawings. The surveillance camera system 50 according to the present embodiment has the same configuration as the surveillance camera system 1 according to the first embodiment, except that the processor switching device 52 includes a wind speed measuring unit 53. Therefore, for convenience of explanation, members other than the processor switching device 52 provided with the wind speed measuring unit 53 and members having the same functions as the members provided in the processor switching device 15 described in the first embodiment are as follows. The same reference numerals are given and explanations thereof are omitted.

(Processor switching device 52)
The processor switching device 52 according to the present embodiment will be described with reference to FIG. FIG. 9 is a block diagram illustrating a configuration of a monitoring camera system 50 including the monitoring camera 51 including the processor switching device 52 according to the present embodiment. As illustrated in FIG. 9, the processor switching device 52 further includes a wind speed measuring unit 53 in addition to the configuration of the processor switching device 15 according to the first embodiment.

  The wind speed measuring unit 53 measures the wind speed in the environment outside the monitoring camera 2 (hereinafter, “external environment”), and transmits the wind speed to the control unit 18.

(Processor switching method)
A processor switching method by the processor switching device 52 according to the present embodiment will be described with reference to FIG. FIG. 10 is a flowchart for explaining an example of a processor switching method by the processor switching device 52 according to the present embodiment. Note that detailed description of the same steps as those of the processor switching method according to the first embodiment will be omitted.

  First, the switching unit 21 operates one of the first CPU 7 and the second CPU 8 (step S60). And the wind speed measurement part 53 measures a wind speed, and the acquisition part 19 acquires the wind speed (reference information (meteorological element)) which the wind speed measurement part 53 measured from the wind speed measurement part 53 (step S61). The acquisition unit 19 may acquire the wind speed from the outside instead of from the wind speed measurement unit 53.

  Next, the setting unit 20 determines whether or not the wind speed acquired by the acquisition unit 19 is less than a predetermined threshold (step S62). When the setting unit 20 determines that the wind speed is less than the predetermined threshold (YES in step S62), the process proceeds to step S63. When the setting unit 20 determines that the wind speed is not less than the predetermined threshold (NO in step S62), the process proceeds to step S69 described later. Note that the wind speed threshold used by the setting unit 20 for the determination is preferably a low wind speed at which the cooling effect by the wind is difficult to obtain and the rise in CPU temperature can be affected when the wind speed is less than the threshold.

  In the step S63, the setting unit 20 sets the switching condition as a condition that the CPU temperature of the operating CPU (first CPU 7 or second CPU 8) measured by the temperature measurement unit 16 exceeds a predetermined temperature (hereinafter, temperature threshold). Set to. And the setting part 20 sets the threshold value of the said temperature (step S64).

  Next, the temperature measuring unit 16 measures the CPU temperature of the operating CPU (first CPU 7 or second CPU 8), and the switching unit 21 is the operating CPU (first CPU 7 or second CPU 8) measured by the temperature measuring unit 16. It is determined whether or not the CPU temperature exceeds a temperature threshold (step S65). When it is determined that the CPU temperature has exceeded the temperature threshold (YES in step S65), the switching unit 21 switches the CPU to be operated (step S66). When the switching unit 21 determines that the CPU temperature does not exceed the temperature threshold (NO in step S65), the process proceeds to step S67.

  In step S67, the wind speed measurement unit 53 measures the wind speed, and the acquisition unit 19 acquires the wind speed (reference information) measured by the wind speed measurement unit 53 from the wind speed measurement unit 53. And the setting part 20 determines whether the wind speed which the acquisition part 19 acquired is more than a predetermined threshold value (step S68). When the setting unit 20 determines that the wind speed is equal to or higher than the predetermined threshold (YES in step S68), the process proceeds to step S69. If the setting unit 20 determines that the wind speed is not equal to or greater than the predetermined threshold (NO in step S68), the process returns to step S65, and steps S65 to S65 are performed until the setting unit 20 determines that the wind speed is equal to or greater than the predetermined threshold. The process of S68 is repeated.

  Step S69 described above will be described. In step S69, the setting unit 20 sets the switching condition such that the current time measured by the time measuring unit 17 passes a predetermined time (hereinafter referred to as switching time). Then, the setting unit 20 sets the switching time (step S70).

  Next, the time measuring unit 17 measures the current time, and the switching unit 21 determines whether or not the current time measured by the time measuring unit 17 has passed the switching time (step S71). When it is determined that the current time has passed the switching time (YES in step S71), the switching unit 21 switches the CPU to be operated (step S72). When the switching unit 21 determines that the current time has not passed the switching time (NO in step S71), the process proceeds to step S73.

  In step S73, the wind speed measuring unit 53 measures the wind speed, and the acquiring unit 19 acquires the wind speed (reference information) measured by the wind speed measuring unit 53 from the wind speed measuring unit 53. And the setting part 20 determines whether the wind speed which the acquisition part 19 acquired is less than a threshold value (step S74). When the setting unit 20 determines that the wind speed is less than the threshold value (YES in step S74), the process proceeds to step S73. When the setting unit 20 determines that the wind speed is not less than the threshold (NO in step S74), the process returns to step S71, and the steps S71 to S74 are performed until the setting unit 20 determines that the wind speed is less than the threshold. repeat.

  As described above, when the wind speed is less than the predetermined threshold, the processor switching device 52 according to the present embodiment sets the switching condition to the condition that the temperature of the operating processor exceeds the predetermined threshold, and the wind speed Is equal to or greater than a predetermined threshold, the switching condition is set such that the current time passes a predetermined time. As a result, it is difficult to obtain a cooling effect by wind.If the wind speed is lower than the threshold, the processor to be operated is switched according to the temperature of the processor, and it is easy to obtain the cooling effect by wind. The processor to be operated can be switched. As a result, even when the processor temperature decreases due to the influence of the high wind speed and the processor to be operated cannot be switched, the processor can be switched.

  In the processor switching device according to the present embodiment, the wind speed is measured using the wind speed as reference information, and the switching condition is set according to the wind speed. However, instead of the wind speed, for example, a weather element such as precipitation (or snowfall) May be used as reference information. In that case, in addition to the configuration of the processor switching device 15 according to the first embodiment, the processor switching device includes a precipitation measuring unit (or snowfall sensor) (not shown) such as a rain gauge or a rainfall sensor (or snowfall sensor). In addition, the precipitation measurement unit (or snowfall sensor) measures the precipitation (or snowfall), and when the precipitation (or snowfall) is below a predetermined threshold, the switching condition is activated. If the temperature of the internal processor exceeds a predetermined threshold, and the precipitation (or snowfall) is greater than or equal to the predetermined threshold, the switching condition is set to the condition that the current time passes the predetermined time. Set.

  Thereby, when the precipitation amount (or snowfall amount) as a weather element is less than a threshold at which the cooling effect due to rain (or snow) is difficult to be obtained, the processor switching device 52 selects the processor to be operated according to the processor temperature. Can be switched. Further, the processor switching device 52 switches the processor to be operated according to the current time when the precipitation amount (snowfall amount) as a weather element is equal to or greater than a threshold at which a cooling effect due to rain (or snow) is easily obtained. it can. Thereby, the processor switching device 52 can switch the processor even when the temperature of the processor is lowered due to the influence of rain or snow and the processor to be operated cannot be switched.

  Furthermore, in the processor switching device 52 according to the present embodiment, the processor may be switched by referring to both the wind speed and precipitation (or snowfall) as reference information.

[Modification]
The processors included in the monitoring cameras 2, 31, 41, and 51 included in the monitoring camera systems 1, 30, 40, and 50 according to the present embodiment may be multi-core CPUs. FIG. 11 is a block diagram illustrating a configuration of a monitoring camera system 60 including a monitoring camera 61 including a multi-core CPU 62. As shown in FIG. 11, in the monitoring camera system 60, in the configuration of the monitoring camera system 1 according to the first embodiment, the configuration in which the monitoring camera 61 includes a processor and each member attached to the processor is not two sets. Only one set is provided. Specifically, the surveillance camera 61 includes a multi-core CPU 62 as a processor, a radio unit 67, a power supply unit 68, and a memory 69 associated therewith. The multi-core CPU 62 includes a first core 63, a second core 64, a third core 65, and a fourth core 66.

  Even in such a configuration including a multi-core CPU as a processor for controlling the monitoring camera, the same method as in the above-described first to fourth embodiments can be performed. In that case, the processor switching devices 15, 32, 42, and 52 include the first core 63, the second core 64, and the third core included in the multi-core CPU 62 instead of the first CPU 7 and the second CPU 8 described in the first to fourth embodiments. By switching the core to be operated among the core 65 and the fourth core 66, the same effect as the processor switching device according to the first to fourth embodiments can be obtained.

[Example of software implementation]
The control blocks of the processor switching devices 15, 32, 42 and 52 (particularly the acquisition unit 19, the setting unit 20 and the switching unit 21 of the control unit 18) are logic circuits (hardware) formed in an integrated circuit (IC chip) or the like. Hardware), or software using a CPU (Central Processing Unit).

  In the latter case, the processor switching devices 15, 32, 42 and 52 have a CPU for executing instructions of a program which is software for realizing each function, and the program and various data are recorded so as to be readable by a computer (or CPU). A ROM (Read Only Memory) or a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) for expanding the program, and the like are provided. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. Note that one embodiment of the present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.

[Summary]
A processor switching device (15, 32, 42, and 52) according to aspect 1 of the present invention is a processor switching device that switches a processor to be operated among a plurality of processors (first CPU 7 and second CPU 8). The switching condition (21) for switching the processor to be operated among the plurality of processors, the acquisition unit (19) for acquiring reference information, and the switching condition according to the reference information acquired by the acquisition unit. And a setting unit (20) for setting.

  According to the above configuration, by recognizing the surrounding environment based on the reference information, it is possible to set a switching condition based on the influence of the surrounding environment on the processor temperature. As a result, even if the processor to be operated cannot be switched due to the influence of the surrounding environment, the processor can be switched. Therefore, it is possible to prevent the processing from being concentrated on a specific processor, and to reduce the operation time of the processor. Then, deterioration of the processor due to heat can be suppressed by the reduced operation time, and the product life of the processor can be extended.

  In the processor switching device (15, 32, 42, and 52) according to aspect 2 of the present invention, in the aspect 1, the reference information includes at least one of current time, date, altitude, and wind speed. Also good.

  According to the above configuration, it is easy to estimate the influence of the surrounding environment on the temperature of the processor by referring to the current time, date, altitude, or wind speed. Thereby, the processor switching device according to aspect 1 can be preferably used.

  In the processor switching device (15) according to aspect 3 of the present invention, in the aspect 2, the reference information acquired by the acquisition unit includes the current time, and the setting unit determines that the current time is daytime. Is set to the condition that the temperature of the operating processor exceeds a predetermined temperature, and when the current time indicates night, the switching condition is You may set to the conditions that predetermined time passes.

  According to the above configuration, the processor to be operated can be switched according to the temperature of the processor in the daytime when the temperature tends to be high, and the processor to be operated can be switched according to the current time at night when the temperature is likely to be low. . Thereby, even if it is a case where the processor to operate cannot be switched by the influence of low temperature at night, a processor can be switched.

  In the processor switching device (32) according to aspect 4 of the present invention, in the aspect 2, the reference information acquired by the acquisition unit includes a date, and the setting unit indicates that the date indicates summer. The switching condition is set to a condition that the temperature of the operating processor exceeds a predetermined temperature, and when the date indicates night, the switching condition is set to the predetermined time. You may set to the conditions that pass.

  According to the above configuration, the processor to be operated can be switched according to the temperature of the processor in the summer when the temperature tends to be high, and the processor to be operated can be switched according to the current time in the winter when the temperature is likely to be low. . Thereby, even if it is a case where the processor to operate cannot be switched by the influence of the low temperature of winter, a processor can be switched.

  In the processor switching device (42) according to aspect 5 of the present invention, in the aspect 2, the reference information acquired by the acquisition unit includes an altitude, and the setting unit indicates that the altitude is low. The switching condition is set to a condition in which the temperature of the operating processor exceeds a predetermined temperature, and the altitude indicates a high altitude, the switching condition is set to the predetermined time. You may set to the conditions that pass.

  According to the above configuration, the processor to be operated can be switched according to the temperature of the processor in the lowland where the temperature tends to be high, and the processor to be operated can be switched according to the current time in the highland where the temperature is likely to be low. . Thereby, even if it is a case where the processor to operate cannot be switched by the influence of the low temperature of a high altitude, a processor can be switched.

  In the processor switching device (52) according to aspect 6 of the present invention, in the aspect 2, the reference information acquired by the acquisition unit includes a weather element, and the setting unit includes a predetermined weather element. The switching condition is set to a condition that the temperature of the operating processor exceeds a predetermined threshold when the threshold is less than a predetermined threshold, and when the weather element is equal to or higher than the predetermined threshold, the switching condition is You may set to the conditions that time passes predetermined time.

  According to the above configuration, in a weather element that is less than a threshold value where it is difficult to obtain a cooling effect due to a weather element, the processor to be operated is switched according to the temperature of the processor, and a weather element that is equal to or greater than a threshold value where a cooling effect due to the weather element is easily obtained Then, the processor to be operated can be switched according to the current time. Thereby, even when the temperature of the processor decreases due to the influence of weather factors and the processor to be operated cannot be switched, the processor can be switched.

  In the processor switching device (52) according to aspect 7 of the present invention, in the aspect 6, the weather element may be at least one of wind speed, precipitation, and snowfall.

  According to said structure, in the processor switching apparatus of the said aspect 6, when the temperature of a processor falls by the influence of at least any one of a wind speed, precipitation, and snowfall, and the processor to operate cannot be switched. Even if it is, the processor can be switched.

  A surveillance camera (2, 31, 41, and 51) according to aspect 8 of the present invention includes any one of the processor switching devices according to aspects 1 to 7 and the plurality of processors.

  According to said structure, the processor switching apparatus which concerns on the said aspects 1-7 can be used suitably.

  In the surveillance camera (2, 31, 41 and 51) according to aspect 9 of the present invention, in the aspect 8, the plurality of processors may be separated from each other by a predetermined distance or more.

  According to the above configuration, it is possible to prevent heat from being generated by each processor on a substrate including a plurality of processors, and to suppress an increase in the temperature of the processor.

  A surveillance camera (2, 31, 41, and 51) according to an aspect 10 of the present invention further includes a substrate on which the plurality of processors are installed in the above aspects 8 and 9, wherein the plurality of processors are the first The first group may be disposed on a surface opposite to the surface of the substrate on which the second group is disposed. Good.

  According to the above configuration, since the plurality of processors are isolated from each other via the substrate, it is possible to prevent heat from being generated by each processor and to prevent an increase in the temperature of the processor. Can be suppressed.

  A processor switching method according to an aspect 11 of the present invention is a processor switching method for switching a processor to be operated among a plurality of processors, and switches a processor to be operated among the plurality of processors with reference to a switching condition. A switching step, an acquisition step of acquiring reference information, and a setting step of setting the switching condition according to the reference information acquired in the acquisition step.

  According to said structure, there exists an effect similar to the said aspect 1. FIG.

  The processor switching device according to each aspect of the present invention may be realized by a computer. In this case, the processor switching device is operated on each computer by operating the computer as each unit (software element) included in the processor switching device. The control program for the processor switching device realized and the computer-readable recording medium on which the control program is recorded also fall within the scope of the present invention.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

1, 30, 40, 50, 60 Surveillance camera system 2, 31, 41, 51, 61 Surveillance camera 6 Imaging unit 7 First CPU
8 Second CPU
15, 32, 42, 52 Processor switching device 16 Temperature measurement unit 17 Time measurement unit 18 Control unit 19 Acquisition unit 20 Setting unit 21 Switching unit 22 Substrate 33 Date measurement unit 43 Altitude measurement unit 53 Wind speed measurement unit

Claims (13)

A processor switching device that switches a processor to be operated among a plurality of processors,
A switching unit that switches a processor to be operated among a plurality of processors with reference to the switching condition;
An acquisition unit for acquiring reference information;
A processor switching device, comprising: a setting unit configured to set the switching condition according to reference information acquired by the acquisition unit.   The processor switching device according to claim 1, wherein the reference information includes at least one of a current time, a date, an altitude, and a weather element. The reference information acquired by the acquisition unit includes the current time,
The setting part
When the current time indicates daytime, the switching condition is set to a condition that the temperature of the operating processor exceeds a predetermined temperature,
3. The processor switching device according to claim 2, wherein when the current time indicates night, the switching condition is set to a condition that the current time passes a predetermined time. The reference information acquired by the acquisition unit includes a date,
The setting part
When the date indicates summer, the switching condition is set to a condition that the temperature of the operating processor exceeds a predetermined temperature,
3. The processor switching device according to claim 2, wherein when the date indicates winter season, the switching condition is set to a condition that a current time passes a predetermined time. The reference information acquired by the acquisition unit includes altitude,
The setting part
When the altitude indicates a low altitude, the switching condition is set to a condition that the temperature of the operating processor exceeds a predetermined temperature,
3. The processor switching device according to claim 2, wherein when the altitude indicates a high altitude, the switching condition is set to a condition that a current time passes a predetermined time. The reference information acquired by the acquisition unit includes a weather element,
The setting part
When the weather element is less than a predetermined threshold, the switching condition is set to a condition that the temperature of the operating processor exceeds a predetermined threshold,
3. The processor switching device according to claim 2, wherein when the weather element is equal to or greater than a predetermined threshold, the switching condition is set to a condition that a current time passes a predetermined time.   The processor switching device according to claim 6, wherein the weather element is at least one of wind speed, precipitation, and snowfall. The processor switching device according to any one of claims 1 to 7,
A surveillance camera comprising the plurality of processors.   The surveillance camera according to claim 8, wherein the plurality of processors are separated from each other by a predetermined distance or more. A board on which the plurality of processors are installed;
The plurality of processors includes two groups including a first group and a second group,
The surveillance camera according to claim 8 or 9, wherein the first group is installed on a surface opposite to a surface of the substrate on which the second group is installed. A processor switching method for switching a processor to be operated among a plurality of processors,
A switching step of switching a processor to be operated among a plurality of processors with reference to the switching condition;
An acquisition process for acquiring reference information;
And a setting step of setting the switching condition according to the reference information acquired in the acquisition step.   A control program for causing a computer to function as the processor switching device according to claim 1, wherein the control program causes the computer to function as the switching unit, the obtaining unit, and the setting unit.   A computer-readable recording medium on which the control program according to claim 12 is recorded.

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