JP6912325B2 - Work site monitoring device - Google Patents

Description

The present disclosure relates to a work site monitoring device that monitors a work environment such as temperature and humidity at a work site such as a construction site.

At construction sites such as construction sites, which are often outdoors, it is necessary to take measures against deterioration of the work environment, such as the risk of workers developing heat stroke, especially in hot seasons such as summer. Therefore, Patent Document 1 discloses a heat stroke prediction device for predicting heat stroke as a device for monitoring a work environment at an outdoor construction site. Based on the information from the temperature / humidity sensor, this device transmits an alarm signal to the outside when both the temperature and humidity values exceed a predetermined value set according to the work environment.

Japanese Unexamined Patent Publication No. 2015-195451

However, in the apparatus of Patent Document 1, an alarm signal is transmitted to the outside every time the numerical values of temperature and humidity become equal to or higher than the predetermined values under the situation where the numerical values of temperature and humidity fluctuate around the set predetermined values. , The alarm signal is complicatedly transmitted to the outside. Then, in a device for monitoring heat stroke such as the device of Patent Document 1, in order to alert workers at the construction site regarding heat stroke, when a heat stroke warning is notified at the construction site, In a situation where the values of temperature and humidity fluctuate around the set predetermined values, the heat stroke alarm may be issued complicatedly. Therefore, there is a risk that the work efficiency at the construction site may decrease because the workers at the construction site cannot concentrate on the work.

Therefore, the present disclosure has been made in order to solve the above-mentioned problems, and an object of the present disclosure is to provide a work site monitoring device capable of suppressing complicated issuance of a heat stroke alarm.

One form of the present disclosure made to solve the above problems is a temperature / humidity sensor, a notification unit for notifying an alarm, and heat obtained at predetermined time intervals from the temperature and humidity detected by the temperature / humidity sensor. In a work site monitoring device having a control unit that controls notification of a heat stroke alarm by the notification unit based on the index, the control unit continuously sets a predetermined threshold value for the value of the heat index. 1 When the value of the heat index continuously exceeds the predetermined threshold value after issuing a notification by the trigger for notifying the heat stroke alarm by the notification unit when the predetermined number of times is exceeded and issuing the alarm by the trigger. The notification unit issues a re-alert to notify a heat stroke alarm , measures the difference between the heat index value and the predetermined threshold at predetermined time intervals, and integrates the measured differences. When the value exceeds a predetermined value, the alarm is issued by the re-alert, and when the value of the heat index is high and the risk of heat stroke is high, the time interval for issuing the alarm by the re-alert is set. If the value of the heat index is low and the risk of heat stroke is low, the time interval for issuing the re-alert is increased by increasing the frequency of issuing the re-alert. It is characterized in that the frequency of issuing a report by the re-alert is reduced, and the frequency of issuing a report by the re-alert is adjusted according to the risk of heat stroke.

According to this aspect, even in a time zone in which the value of the heat index fluctuates around a predetermined threshold value, a heat stroke alarm is issued when the value of the heat index continuously exceeds the predetermined threshold value the first predetermined number of times. Since the notification is performed, it is possible to suppress the complicated issuance of the heat stroke alarm. Therefore, the worker at the work site can concentrate on the work, and the work efficiency at the work site is maintained.

In addition, when the value of the heat index once exceeds the predetermined threshold value and then continues to exceed the predetermined threshold value, a re-alert is issued to alert the worker regarding heat stroke. It can be done continuously.
In addition, if the value of the heat index continuously exceeds a predetermined threshold value after the alarm is issued by the above-mentioned trigger, the heat stroke alarm is not monotonically notified at predetermined time intervals, and the work site. The frequency of notification of heat stroke alarm can be adjusted according to the risk of heat stroke in the above. Therefore, when the work environment has a higher risk of heat stroke at the work site, the frequency of notification of heat stroke warning is increased, and the alert to the worker regarding heat stroke is further strengthened. be able to. On the other hand, when the work environment has a low risk of heat stroke at the work site, the frequency of notification of the heat stroke alarm can be reduced to prevent the heat stroke alarm from being issued complicatedly. Therefore, it is possible to continue to alert the worker about heat stroke appropriately according to the risk of heat stroke at the work site.

In the above aspect, the control unit issues a report by the re-alert when the value of the heat index continuously exceeds the predetermined threshold value a second predetermined number of times.

According to this aspect, after the notification by the trigger is performed, when the value of the heat index continuously exceeds a predetermined threshold value, the heat stroke warning is continuously notified. Can be suppressed. Therefore, during the time period when the value of the heat index continuously exceeds a predetermined threshold value, the worker should be continuously alerted about heat stroke while suppressing the complicated issuance of the heat stroke alarm. Can be done.

In the above aspect, the wireless communication unit has a wireless communication unit for wireless communication with the outside, and the wireless communication unit performs communication with an external user terminal via an external communication network and issues a notification by the trigger. Alternatively, it is characterized in that an e-mail is notified on the user terminal when the alarm is issued by the re-alert.

According to this aspect, it is possible to notify the administrator who manages the user terminal about the heat stroke alarm. Therefore, the manager can promptly respond when the worker may develop heat stroke.

Further, even in the time zone in which the value of the heat index fluctuates around a predetermined threshold value as described above, it is possible to suppress the complicated issuance of the heat stroke alarm at the work site. It is possible to suppress complicated notification of emails.

In the above aspect, the temperature / humidity sensor, the human sensor, and the notification unit are assembled in a housing having a motion sensor for detecting a moving object and accommodating the control unit. It is characterized by being.

According to this aspect, each device such as a temperature / humidity sensor, a motion sensor, and a notification unit can be easily installed. In addition, cost reduction can be achieved.
In the above aspect, the control unit is characterized in that the first predetermined number of times and / or the numerical value of the predetermined value is changed according to the time zone and the season.

According to the work site monitoring device of the present disclosure, it is possible to suppress the complicated issuance of a heat stroke alarm.

It is a front view of the work site monitoring apparatus of this embodiment. It is a side view of the work site monitoring apparatus of this embodiment. It is a top view of the work site monitoring apparatus of this embodiment. It is a side view of the wind speed wind direction sensor. It is a schematic block diagram of a work site monitoring device and a communication destination. It is a block diagram of a monitoring control unit. It is a figure which shows the specific example of the control performed in 1st Embodiment. It is a figure which shows the specific example of the control performed in 2nd Embodiment. It is a figure which shows the specific example of the control performed in the comparative example.

Hereinafter, an embodiment in which the work site monitoring device of the present disclosure is embodied will be described in detail with reference to the drawings.

<First Embodiment>
As shown in FIGS. 1 to 5, the work site monitoring device 1 of the present embodiment includes a motion sensor 11, a temperature / humidity sensor 12, an indicator light 13, a housing 14, a monitoring control unit 15, and a speaker. It has 16, a wind speed wind direction sensor 17, a power plug 18, a connecting metal fitting 19, a mounting metal fitting 20, a mounting metal fitting 21, and the like.

The motion sensor 11 includes three infrared sensors, two sensors detect infrared rays in the horizontal direction, and the remaining one sensor detects infrared rays from the ground direction. Since the motion sensor 11 is provided with three infrared sensors in this way, it is possible to detect (detect) an intruder by reducing malfunctions caused by shaking of birds and trees. Then, when the motion sensor 11 detects a moving object such as a suspicious person, it outputs a detection signal to the monitoring control unit 15. The motion sensor 11 is screwed and fixed to the side surface of the housing 14.

The temperature / humidity sensor 12 measures the temperature and humidity every minute, for example, and outputs the measurement data to the monitoring control unit 15. The temperature / humidity sensor 12 is connected to the housing 14 via a connecting metal fitting 19.

The indicator light 13 is one of the notification units for notifying the alarm. The indicator lamp 13 has light emitting units of three colors of red, blue, and yellow, and the light emitting operation thereof is controlled by the monitoring control unit 15. For example, the indicator light 13 blinks a red light when it detects a suspicious person, blinks a yellow light when it notifies a heat stroke alarm, and turns on a blue light when the wind speed exceeds a predetermined value. Let me.

The housing 14 is made of metal and houses the monitoring control unit 15 and the speaker 16. A dedicated mounting bracket 20 for mounting on the pole 41 is attached to the housing 14.

As shown in FIG. 6, the monitoring control unit 15 includes a wireless communication unit 31, a memory 32, a first IF (first interface) 33, a second IF (second interface) 34, a monitoring control unit CPU 35, and a power supply. It has 36 and so on.

The wireless communication unit 31 wirelessly communicates with the external management server 51 (see FIG. 5) via the mobile phone communication network and the Internet network constituting the communication network N (see FIG. 5).

The memory 32 stores various setting values for emitting from the speaker 16 and various messages of alarm contents. Further, the memory 32 stores a conversion table (for example, a WBGT value conversion table) in which the threshold value of the wind speed for specifically notifying the alarm and the probability of the onset of heat stroke obtained from the temperature and humidity are tabulated.

The first IF 33 receives signals output from the motion sensor 11, the temperature / humidity sensor 12, and the wind speed / direction sensor 17. The indicator light 13 and the speaker 16 are connected to the second IF 34.

The monitoring control unit CPU 35 controls the monitoring control unit 15. Further, the monitoring control unit CPU 35 determines that an abnormality has occurred when the obtained wind speed data exceeds the threshold value. Further, the monitoring control unit CPU 35 refers to the conversion table from the temperature and humidity data, outputs a heat stroke danger signal when the probability of heat stroke onset reaches a certain value, and issues a heat stroke alarm from the indicator lamp 13 and the speaker 16. Control to notify. It should be noted that this warning is carried out in a plurality of stages, and the warning content is changed depending on whether the warning is in the warning area or the danger area. In this way, the monitoring control unit 15 determines the indicator lamp 13 and the speaker 16 based on the heat index WBGT obtained at predetermined time intervals (for example, every minute) from the temperature and humidity detected by the temperature / humidity sensor 12. Controls the notification of the alarm by.

Further, the monitoring control unit CPU 35 communicates with the management server 51 every minute, for example, and transmits the value acquired from each sensor and the calculation result to the management server 51. Further, the monitoring control unit CPU 35 communicates with the user terminal 52 such as a personal computer or a mobile terminal via the management server 51, and determines the schedule (sensor operation time zone, etc.), threshold value, etc. input by the user terminal 52. Make settings. Then, the setting information at this time is saved in the memory 32.

The power supply 36 receives power from a commercial power supply via the power plug 18. Then, the motion sensor 11, the temperature / humidity sensor 12, the wind speed / wind direction sensor 17, and the indicator lamp 13 and the speaker 16 receive power from the monitoring control unit 15 via the first IF33 and the second IF34.

The speaker 16 is one of the notification units for notifying the alarm. The speaker 16 is installed at the bottom of the housing 14, and emits various alarm sounds and various messages under the control of the monitoring control unit 15.

The wind speed wind direction sensor 17 includes a signal conversion unit 17a that converts wind speed information and wind direction information into an electric signal, and is connected to the housing 14 by a cable 17b. Then, the signal from the wind speed wind direction sensor 17 is sent to the monitoring control unit 15 via the cable 17b. The wind speed wind direction sensor 17 includes a mounting bracket 21 for mounting on the pole 41. Since the wind speed / wind direction sensor 17 needs to be installed at a place higher than the motion sensor 11 and the temperature / humidity sensor 12 integrally provided in the housing 14, they are installed independently, and the housing 14 Is installed on the upper part of the pole 41 on which the sensor is installed. Further, the wind speed wind direction sensor 17 measures the wind speed and the wind direction every 0.25 seconds, and outputs the measurement data to the monitoring control unit 15. Here, the wind speed wind direction sensor 17 transmits the wind speed data and the wind direction data, but only the wind speed data may be transmitted.

The power plug 18 supplies power to the monitoring control unit 15, the motion sensor 11, the temperature / humidity sensor 12, and the wind speed / direction sensor 17 housed in the housing 14.

The work site monitoring device 1 having such a configuration operates (acts) as follows. First, the operating time of the motion sensor 11, the temperature / humidity sensor 12, and the wind speed / direction sensor 17 is set according to the working time zone at the site. In addition, a threshold value for wind speed is set according to the monitoring environment. Such a setting may be performed by connecting a setting means such as a user terminal 52 to the housing 14, or may be performed by the user terminal 52 via the communication network N.

Then, the work site monitoring device 1 set in this way performs the following monitoring operation by the monitoring control unit CPU 35. For example, when a suspicious person invades during a time zone in which the motion sensor 11 is set to operate, such as at night, the motion sensor 11 detects the motion and performs an alarm operation. At this time, for example, the red light of the indicator lamp 13 blinks, a threatening sound is emitted from the speaker 16, and a message such as "There is a suspicious person. Please evict immediately." Is emitted from the speaker 16.

Further, when the temperature and humidity satisfy certain conditions from the information of the temperature / humidity sensor 12, a heat stroke alarm is notified. At this time, for example, the blue light of the indicator light 13 is turned on, an alarm sound is emitted from the speaker 16, and a message (voice) such as "Be careful of heat stroke" is emitted from the speaker 16.

Further, when the wind speed exceeds the set threshold value, a strong wind warning is notified. At this time, for example, the yellow light of the indicator light 13 is turned on, an alarm sound is emitted from the speaker 16, and a message such as "A strong wind is blowing. Please interrupt the work." Is emitted from the speaker 16. Be done.

Then, the detection status of these suspicious persons, the heat stroke warning, and the monitoring status of the strong wind warning are transmitted from the wireless communication unit 31 to the management server 51 via the communication network N, and the mobile terminal further managed by the manager from the management server 51. Is transmitted to the user terminal 52 such as.

In the present embodiment, the temperature / humidity sensor 12, the motion sensor 11, the indicator light 13, and the speaker 16 are assembled in the housing 14 in which the monitoring control unit 15 is housed. Then, in this way, each device for monitoring heat stroke prevention, monitoring a suspicious person, and notifying an alarm is integrated by using one common housing 14. Therefore, by attaching the housing 14 to the pole 41, each device can be easily installed. Further, the movement of the monitoring place by the work site monitoring device 1 can be carried out by a simple operation of moving one housing 14. Further, since the notification for the abnormality detection of the two types of sensors can be performed by the common notification unit (indicator light 13 and speaker 16), the cost can be reduced.

In the work site monitoring device 1 as described above, the control performed in the present embodiment with respect to the heat stroke alarm will be described.

Here, as a comparative example, as shown in FIG. 9, every time the value of the heat index WBGT (wet-bulb globe temperature) exceeds a predetermined threshold value (for example, 31 ° C.), a heat stroke warning is notified and heat stroke occurs. Suppose an example in which an email notification regarding an alarm is sent. Then, for example, in the time zone from 11:30 to 11:38, when the value of the heat index WBGT fluctuates between values around a predetermined threshold value, a heat stroke warning notification and an e-mail notification (in the figure, " "Alarm + mail") is complicated. Therefore, in order to prevent the onset of heat stroke, the worker needs to interrupt the work more than necessary and take a break, or the worker cannot concentrate on the work due to the complicated heat stroke warning. There is a risk. In addition, there is a risk that the administrator who manages the email (for example, the site administrator) will be overwhelmed by the email management work due to the complicated notification of the email. Therefore, the work efficiency at the work site may decrease.

Therefore, in the present embodiment, the notification by the trigger is performed with respect to the notification of the heat stroke alarm. That is, when the value of the heat index WBGT continuously exceeds a predetermined threshold value X a predetermined number of times, the monitoring control unit 15 issues a trigger by the indicator lamp 13 and the speaker 16 to notify the heat stroke alarm. The predetermined number of times X is an example of the "first predetermined number of times" in the present disclosure, and is at least two times (plural times).

Further, in the present embodiment, when the wireless communication unit 31 of the monitoring control unit 15 communicates with the external user terminal 52 via the external communication network N and the alarm is issued by the trigger. The user terminal 52 also notifies an e-mail regarding a heat stroke alarm. As a result, it is possible to notify the manager (for example, the site manager) who manages the user terminal 52 about the heat stroke alarm. Therefore, the manager can promptly respond when the worker may develop heat stroke.

Here, as a specific example, it is assumed that, for example, the monitoring control unit 15 calculates the heat index WBGT every minute based on the temperature and humidity detected by the temperature / humidity sensor 12. Further, a predetermined threshold value for the heat index WBGT is set to 31 ° C., and the predetermined number of times X is set to "3". Then, as shown in FIG. 7, the monitoring control unit 15 sets the monitoring control unit 15 in a time zone in which the value of the heat index WBGT fluctuates around 31 ° C., such as a time zone from 11:30 to 11:38. The indicator light 13 and the speaker 16 do not notify the heat stroke alarm, and the user terminal 52 does not notify the mail. On the other hand, when the value of the heat index WBGT exceeds 31 ° C. three times in a row (time 11:43), the monitoring control unit 15 notifies the heat stroke warning and notifies the e-mail (Fig.). Medium "alarm + mail").

In this way, even in a time zone in which the value of the heat index WBGT goes back and forth around a predetermined threshold value, a heat stroke alarm is issued when the value of the heat index WBGT continuously exceeds the predetermined threshold value X times. Since the notification of the above and the notification of the mail are performed, it is possible to suppress the complicated issuance of the heat stroke alarm at the work site and the complicated notification of the mail on the user terminal 52. Therefore, the worker at the work site can concentrate on the work, and the work efficiency at the work site is maintained. Moreover, since the administrator is not overwhelmed by the mail management work, the administrator can carry out the management work of the worker.

Further, in the present embodiment, after the trigger is issued as described above, when there is a risk of heat stroke due to the continuous high heat index WBGT, the re-alert is issued. That is, the monitoring control unit 15 continuously issues a heat stroke alarm by the indicator light 13 and the speaker 16 when the value of the heat index WBGT exceeds a predetermined threshold value after issuing the alarm by the trigger. Make a report. Then, in the present embodiment, at this time, the wireless communication unit 31 of the monitoring control unit 15 performs communication with the external user terminal 52 via the external communication network N, and the alarm is issued by the above-mentioned re-alert. When it is called, the user terminal 52 notifies the user terminal 52 of an e-mail regarding the heat stroke alarm.

As a result, when the value of the heat index WBGT once exceeds a predetermined threshold value and then continuously exceeds the predetermined threshold value, a re-alert is issued and an e-mail is notified to the worker or the administrator. It is possible to continue to call attention to heat stroke.

Here, when the re-alert is issued, if the re-alert is issued every time the value of the heat index WBGT exceeds a predetermined threshold value as in the comparative example shown in FIG. 9, heat stroke. Warning notifications and email notifications are complicated.

Therefore, in the present embodiment, the notification of the heat stroke alarm and the notification of the e-mail are not complicatedly performed, and the alarm is issued by the re-alert. Specifically, the monitoring control unit 15 issues a re-alert when the value of the heat index WBGT continuously exceeds a predetermined threshold value Y a predetermined number of times. The predetermined number of times Y is an example of the "second predetermined number of times" in the present disclosure, and is at least two times (plural times).

Here, as a specific example, for example, the predetermined number of times Y is set to "5". Then, as shown in FIG. 7, the monitoring control unit 15 issues a trigger by a trigger at 11:43, and then continuously sets the heat index WBGT value at 31 ° C., which is a predetermined threshold value, five times. When it exceeds (5 minutes in a row) (time 11: 48, 53, 58), a re-alert is issued and an email is notified.

As a result, when the value of the heat index WBGT continuously exceeds a predetermined threshold value (for example, 31 ° C.) after the notification by the trigger is performed, it is continuously (for example, every minute). It is possible to suppress the notification of heat stroke warning and the notification of e-mail. Therefore, in the time zone when the value of the heat index WBGT continuously exceeds a predetermined threshold value, the worker or the manager is notified while suppressing the complicated issuance of the heat stroke alarm and the complicated notification of the e-mail. On the other hand, it is possible to continue to call attention to heat stroke.

The monitoring control unit 15 may change the numerical values of the predetermined number of times X and the predetermined number of times Y according to the time zone and the season. As a result, it is possible to adjust the timing (time) of issuing a trigger and notifying an e-mail, and the interval (frequency) of the time of issuing a re-alert and notifying an e-mail according to the time zone and the season.

<Second Embodiment>
Next, the second embodiment will be described, but the points different from the first embodiment will be mainly described.

In the present embodiment, the monitoring control unit 15 measures the difference between the value of the heat index WBGT and the predetermined threshold value at predetermined time intervals, and when the integrated value of the measured difference becomes equal to or more than the predetermined value, a re-alert is performed. Make a report. Here, for example, the monitoring control unit 15 measures every minute a value obtained by adding "1" to the difference between the value of the heat index WBGT and the predetermined threshold value, and the total value of the measured values is the predetermined value Z. When the above is reached, a re-alert will be issued.

Here, as a specific example, for example, the predetermined value Z is set to "10 ° C.". Then, as shown in FIG. 8, the monitoring control unit 15 issues a trigger alarm at 11:43, and then sets the difference between the heat index WBGT value and the predetermined threshold value (31 ° C.) as " The value obtained by adding "1" is measured every minute. For example, at 11:44,45,46, the value of the heat index WBGT is "33 ° C", so the value obtained by adding "1" to the difference between the value of the heat index WBGT and the predetermined threshold value is , (33 ° C)-(31 ° C) + (1 ° C) = "3 ° C". Then, at 11:47, the value of the heat index WBGT is "32 ° C.", so that the value obtained by adding "1" to the difference between the value of the heat index WBGT and the predetermined threshold value is (32 ° C.). )-(31 ° C) + (1 ° C) = "2 ° C". Therefore, the total value from time 11:44 to time 11:47 for the value obtained by adding "1" to the difference between the value of the heat index WBGT and the predetermined threshold value becomes "11 ° C" and is predetermined. The value Z of "10 ° C." was exceeded. Therefore, a re-alert alert is issued at 11:47. Similarly, at 11:51, 55, 59 at time, a re-alert alert is issued. As described above, when the value of the heat index WBGT is high and the risk of heat stroke (probability of developing heat stroke) is high, as shown in FIG. 8, the re-alert is used as compared with the example shown in FIG. It is possible to increase the frequency by reducing the time interval between issuing a notification and notifying an email.

On the other hand, when the value of the heat index WBGT is relatively low and the risk of heat stroke is low, the time interval between alerting and email notification can be increased to reduce the frequency. ..

In this way, in the present embodiment, the risk of heat stroke is determined not only by the length of time that the value of the heat index WBGT continues to exceed a predetermined threshold value, but also by the value of the heat index WBGT along the time axis. Judgment is made by measuring the size of the area between the value of the heat index WBGT when the change is represented by a line and a predetermined threshold value. Then, the timing (time) of issuing the alarm by the re-alert is adjusted according to the size of the measured area.

As a result, when the value of the heat index WBGT continuously exceeds a predetermined threshold value (for example, 31 ° C.) after the alarm is issued by the trigger, every predetermined time (for example, every minute). ) Is not monotonously notified of heat stroke warning and email, and the frequency of notification of heat stroke warning and email notification can be adjusted according to the risk of heat stroke at the work site. Therefore, when the work environment has a higher risk of heat stroke at the work site, the frequency of notification of heat stroke warning and e-mail notification is increased to notify the worker or manager of heat stroke. It is possible to further strengthen the alert regarding. On the other hand, when the work environment has a low risk of heat stroke at the work site, the frequency of notification of heat stroke warning and e-mail notification is reduced, and heat stroke warning is issued complicatedly or e-mail is sent. It is possible to suppress complicated notification. Therefore, it is possible to continuously alert workers and managers regarding heat stroke according to the degree of risk of heat stroke at the work site.

The monitoring control unit 15 may change the numerical value of the predetermined value Z according to the time zone and the season. As a result, it is possible to adjust the interval (frequency) between the notification by re-alert and the notification of e-mail according to the time zone and the season.

It should be noted that the above-described embodiment is merely an example and does not limit the present disclosure in any way, and it goes without saying that various improvements and modifications can be made without departing from the gist thereof.

For example, the first embodiment and the second embodiment may be combined. That is, after the monitoring and control unit 15 issues a trigger, the monitoring and control unit 15 continuously issues a re-alert when the value of the heat index WBGT exceeds a predetermined threshold value, and together with the value of the heat index WBGT. A re-alert may be issued even when the integrated value of the difference obtained by measuring the difference from the predetermined threshold value at predetermined time intervals exceeds the predetermined value.

1 Work site monitoring device 11 Human sensor 12 Temperature / humidity sensor 13 Indicator light 14 Housing 15 Monitoring control unit 16 Speaker 17 Wind speed Wind direction sensor 31 Wireless communication unit 35 Monitoring control unit CPU
51 Management server 52 User terminal N Communication network WBGT Heat index X Predetermined number of times Y Predetermined number of times Z Predetermined value

Claims (5)

Based on the temperature / humidity sensor, the notification unit for notifying the alarm, and the heat index obtained at predetermined time intervals from the temperature and humidity detected by the temperature / humidity sensor, the notification unit notifies the heat stroke alarm. In a work site monitoring device having a control unit to control
The control unit
When the value of the heat index continuously exceeds a predetermined threshold value the first predetermined number of times, the notification unit issues a trigger for notifying a heat stroke alarm, and continues after issuing the alarm by the trigger. When the value of the heat index exceeds the predetermined threshold value, the notification unit issues a re-alert to notify the heat stroke alarm .
By measuring the difference between the value of the heat index and the predetermined threshold value at predetermined time intervals and issuing a notification by the re-alert when the integrated value of the measured difference becomes a predetermined value or more.
When the value of the heat index is high and the risk of heat stroke is high, the time interval for issuing the re-alert is reduced to increase the frequency of issuing the re-alert, while increasing the frequency of issuing the re-alert.
When the value of the heat index is low and the risk of heat stroke is low, the time interval for issuing the re-alert is increased so that the frequency of issuing the re-alert is reduced.
Adjusting the frequency of issuing the re-alert according to the risk of heat stroke,
Work site monitoring device featuring. In the work site monitoring device of claim 1,
When the value of the heat index continuously exceeds the predetermined threshold value a second predetermined number of times, the control unit issues a report by the re-alert.
Work site monitoring device featuring. In the work site monitoring device of claim 1 or 2.
It has a wireless communication unit for wireless communication with the outside,
The wireless communication unit performs communication with an external user terminal via an external communication network, and notifies an e-mail on the user terminal when the trigger is issued or the re-alert is issued. To do,
Work site monitoring device featuring. In the work site monitoring device according to any one of claims 1 to 3.
It has a motion sensor that detects moving objects,
The temperature / humidity sensor, the motion sensor, and the notification unit are assembled in the housing containing the control unit.
Work site monitoring device featuring. In the work site monitoring device according to any one of claims 1 to 4.
The control unit changes the numerical value of the first predetermined number of times and / or the predetermined value according to the time zone and the season.
Work site monitoring device featuring.

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