JP6761765B2 - Heat stroke prevention device - Google Patents

Description

The present invention relates to a heat stroke prevention device that warns of the risk of heat stroke and prevents the illness.

Due to the effects of global warming in recent years, the summer temperature is on the rise. Along with this, the number of people suffering from heat stroke is increasing. At work sites such as construction sites and civil engineering sites, it is often obligatory to wear long-sleeved work clothes and helmets from the viewpoint of safety management. In addition, it is difficult for elderly people and persons with disabilities to be aware of changes in their physical condition, and even if they are aware of changes in their physical condition, it may be difficult to take appropriate measures. Therefore, it is important to detect the risk of heat stroke as soon as possible.

WBGT (Wet Bulb Globe Temperature) has been proposed as an index for determining the risk of heat stroke. WBGT is an index focusing on the heat exchange (heat balance) between the human body and the outside air. WBGT is an index that incorporates three factors that have a large effect on the heat balance of the human body: humidity, the surrounding thermal environment such as solar radiation and radiation, and temperature. Patent Document 1 describes a device that calculates the risk of heat stroke based on the measured WBGT and issues an alarm.

The above WBGT is just an index for evaluating the surrounding environment. However, the risk of suffering from heat stroke varies from person to person. Furthermore, the degree of risk varies depending on the person's clothing status and activity status. Therefore, the apparatus described in Patent Document 1 has a problem that it is difficult to accurately determine the risk of heat stroke. Therefore, a system has been developed that measures biological information such as a person's body temperature and heart rate and determines the risk of heat stroke based on the measured biological information (see, for example, Patent Document 2).

Utility model registration No. 3157604 Japanese Unexamined Patent Publication No. 2012-187127 Japanese Unexamined Patent Publication No. 2015-169551

However, it is difficult to distinguish the fluctuation of the heart rate used as biological information from the fluctuation due to the thermal load and the fluctuation due to the exercise load, and the fluctuation of the heart rate varies from person to person. In addition, the body temperature used as biological information is generally the temperature at which the body surface is measured. This measured body temperature changes depending on the physical condition, surrounding environment, clothing conditions, and the like. Therefore, it is difficult to accurately measure the increase in body temperature. Due to such circumstances, it has been difficult to accurately determine the risk of heat stroke with the conventional system.

On the other hand, a system for determining the risk of heat stroke is required to be easy to use according to the usage environment of humans. For example, it is required that it does not interfere with on-site work and that the device can be easily installed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat stroke prevention device capable of determining the risk of heat stroke in accordance with the surrounding environment and the usage environment.

In order to achieve the above object, the heat stroke prevention device according to the present invention is attached to the inside of the head wearer to be worn on the head of the human body at a position where it comes into contact with the wearer's head and is deep in the wearer. By a core body temperature probe for measuring body temperature, a heat stroke risk determination means for determining the risk of the wearer suffering from heat stroke based on the core body temperature measured by the core body temperature probe, and a heat stroke risk determination means. The head wearing device includes a cap body and a helmet having a hammock and a head band arranged inside the cap body, and includes an alarm means for issuing an alarm according to a determined degree of danger. The body temperature probe is attached to the headband or hammock .

According to the heat stroke prevention device according to the present invention, since the risk of heat stroke is determined based on the core body temperature of the wearer, it is possible to make an accurate determination without being affected by the wearer's surrounding environment or usage environment. it can. Further, according to the heat stroke prevention device according to the present invention, since it is provided on the head wearing device, it is highly convenient without affecting the activity and workability of the wearer.

Top view of the helmet from the bottom side Cross section of the helmet as seen from the side Sectional view of core body temperature probe The figure explaining the charging method of the heat stroke prevention device Functional block diagram of the heat stroke prevention device according to the first embodiment A flowchart illustrating the operation of the heat stroke risk determination unit according to the first embodiment. Top view illustrating other attachment positions of the core body temperature probe Top view illustrating other attachment positions of the core body temperature probe Sectional view of the core body temperature probe according to another example Functional block diagram of the heat stroke prevention device according to the second embodiment A flowchart illustrating the operation of the heat stroke risk determination unit according to the first embodiment. Functional block diagram of the heat stroke prevention device according to the third embodiment Functional block diagram of the heat stroke prevention device according to the fourth embodiment Functional block diagram of the heat stroke prevention device according to the fifth embodiment

(First Embodiment)
The heat stroke prevention device according to the first embodiment of the present invention will be described with reference to the drawings. It is assumed that the heat stroke prevention device according to the present embodiment is used at various work sites such as construction sites and civil engineering sites. Further, it is assumed that the heat stroke prevention device according to the present embodiment is provided on the helmet worn by the wearer as a head wearing tool. FIG. 1 is a plan view of the helmet viewed from the bottom side, and FIG. 2 is a cross-sectional view of the helmet viewed from the side.

The helmet 10 has a structure similar to that of a conventionally known one used in various work sites and the like. The helmet 10 is also called a protective cap. As shown in FIGS. 1 and 2, the helmet 10 includes a cap body 11 made of a hard material such as synthetic resin or metal, a shock absorbing liner 12 provided on the inner surface of the cap body 11, and a liner 12. It is provided with an elastic hammock 13 arranged inside the cap body 11, a head band 14 surrounding the wearer's head circumference, and a jaw strap (not shown) extending downward from both inner side portions of the cap body 11. An eaves 11a is formed on the front portion of the cap body 11. The hammock 13 is configured by arranging a plurality of legs in a radial pattern. The ends of the legs of the hammock 13 are attached to the cap body 11. The headband 14 is attached to the inside of the hammock 13. The headband 14 is provided with a length adjusting mechanism (not shown). A predetermined gap is formed between the hammock 13, the cap body 11, and the liner 12.

The heat stroke prevention device 100 according to the present embodiment includes a core body temperature probe 200 for measuring the core body temperature of the wearer, and a box-shaped storage portion 300 for storing electrical components and the like. The core body temperature probe 200 is provided inside the headband 14 or the hammock 13 (on the wearer side) at a position where it comes into contact with the wearer. The contact position with the wearer is preferably a position where the wearer can easily come into direct contact with the body surface, such as near the wearer's forehead or temples. However, although direct contact with the body surface (scalp) by the hair is difficult, the contact may be made at any position of the head with the hair. In the examples of FIGS. 1 and 2, the core body temperature probe 200 is provided inside the front of the headband 14 and abuts on the frontal region or forehead of the wearer.

The core body temperature probe 200 uses, for example, the dithermal flow method disclosed in Patent Document 3. As shown in FIG. 3, the core body temperature probe 200 includes a two-stage disk-shaped heat insulating material 210 having a thick center and a thin circumference, and temperature sensors arranged on both sides of the thick portion 211 and the thin portion 212 of the heat insulating material 210, respectively. It includes 221 and 223, 222, 224, and a cover 230 made of an aluminum plate which is a low emissivity material that covers the peripheral side surface and the outside air side surface of the heat insulating material 210. The temperature sensors 221 and 222 formed on the bottom surface of the heat insulating material 210, that is, the contact surface with the human body, are substantially flush with the bottom surface of the heat insulating material 210. For the principle and structure of the core body temperature probe 200, refer to Patent Document 3 described above. The invention of the present application can be carried out even if it is disclosed in the prior art of the same document.

As shown in FIGS. 1 and 2, the storage portion 300 is located at the rear portion of the inner surface of the cap body 11 and is arranged in a gap with the hammock 13. The storage portion 300 can also be arranged at an arbitrary position from the rear portion of the inner surface to the side portion of the inner surface of the cap body 11. The storage portion 300 is preferably formed integrally with the cap body 11, but may be separate from the cap body 11. A charging terminal 301 for transmitting charging power is attached to the front surface of the storage unit 300. When charging, as shown in FIG. 4, for example, the rear portion of the helmet 10 is hooked on the hook 410 of the charging device 400 installed on the wall surface. As a result, the charging terminal 411 formed on the upper surface of the hook 410 and the charging terminal 301 of the storage portion 300 are electrically connected, and the heat stroke prevention device 100 can be charged. In addition, instead of the charging terminal 301 of the storage unit 300 and the charging terminal 411 of the charging device 400, a coil or the like for non-contact power transmission may be provided.

FIG. 5 shows a functional block diagram of the heat stroke prevention device. In addition to the core body temperature probe 200, the heat stroke prevention device 100 includes a heat stroke risk determination unit 310, an alarm unit 320, and a power supply unit 330. The core body temperature probe 200 is electrically connected to the heat stroke risk determination unit 310 by wire (not shown). The heat stroke risk determination unit 310, the alarm unit 320, and the power supply unit 330 are housed in the storage unit 300.

The heat stroke risk determination unit 310 calculates the core body temperature based on the temperature measured by each temperature sensor of the core body temperature probe 200, determines the risk of heat stroke based on the core temperature, and determines the risk of heat stroke according to the determined risk. The alarm unit 320 controls to issue an alarm. For the method of calculating the core body temperature, refer to Patent Document 3 described above. As the alarm unit 320, various devices such as a display device such as an LED or an LCD, an audio output device such as a speaker, or a combination thereof can be used. The power supply unit 330 includes a well-known stabilizing circuit, secondary battery, and charging circuit (not shown). The charging circuit of the power supply unit 330 charges the secondary battery with the electric power supplied from the charging device 400.

The operation of the heat stroke risk determination unit according to the present embodiment will be described with reference to the flowchart of FIG. The heat stroke risk determination unit 310 checks whether or not there is an error in the core body temperature probe 200, and if there is an error, controls the alarm unit 320 so as to display a predetermined error (steps S1 and S5). .. Next, the heat stroke risk determination unit 310 calculates the core body temperature based on the temperature measured by each temperature sensor of the core body temperature probe 200 (step S2), and the calculated core temperature is equal to or higher than a predetermined threshold value (for example, 38 ° C.). In the case of, the alarm unit 320 is controlled so as to display that the body temperature is rising (steps S3 and S4).

As described above, according to the heat stroke prevention device according to the present embodiment, the risk of heat stroke is determined based on the core body temperature of the wearer, so that the risk of heat stroke is accurately determined without being affected by the wearer's surrounding environment and usage environment. Judgment can be made. Further, according to the heat stroke prevention device according to the present embodiment, since it is provided on the helmet of the wearer, the workability is not affected and the convenience is high.

In the above embodiment, the core body temperature probe 200 is provided on the front inside of the headband 14 and is in contact with the frontal region or the forehead of the wearer, but may be arranged in another place. In the example of FIG. 7, the core body temperature probe 200 is provided inside either the left or right side or both of the headband 14, and comes into contact with the vicinity of the wearer's temples. In the example of FIG. 8, the core body temperature probe 200 is provided inside the center of the hammock 13 and comes into contact with the vicinity of the crown of the wearer.

Further, for example, when the deep body temperature probe 200 is provided at a position where the hair is located such as the crown as shown in FIG. 8, when the temperature sensors 221 and 222 are provided with the protruding portions 240 as shown in FIG. It is suitable because it can be brought into contact with the body surface through the gaps in the hair. In this case, it is preferable to provide a dummy protrusion 250 in addition to the protrusion 240 on the bottom surface of the core body temperature probe 200 in order to stabilize the contact surface.

(Second Embodiment)
The heat stroke prevention device according to the second aspect of the present invention will be described with reference to the drawings. FIG. 10 is a functional block diagram of the heat stroke prevention device according to the second embodiment.

As shown in FIG. 10, the heat stroke prevention device according to the present embodiment is provided with a WBGT measuring unit 340 for the heat stroke prevention device according to the first embodiment. Other components such as the structure of the helmet 10 are the same as those in the first embodiment. Only the differences will be described here.

As the WBGT measuring unit 340, a well-known one is used, and one provided with an outside air temperature sensor, an outside air humidity sensor, and a WBGT calculation unit, and one further provided with a black globe temperature sensor are used. In this embodiment, an outside air temperature sensor, an outside air humidity sensor, and a WBGT calculation unit are provided. Various forms of mounting the sensor can be considered, such as arranging the sensor in the vicinity of the vent formed in the storage portion 300, attaching the sensor to the outer surface of the storage portion 300, or attaching the sensor to the outside of the helmet 10.

The WBGT calculation unit of the WBGT measurement unit 340 calculates the WBGT by the following formula.

WBGT = 0.735 x Ta
+0.0374 x RH
+0.00292 x Ta x RH
+7.619 x SR-4.557 x SR ²
-0.0572 x WS-4.064

Here, Ta is the air temperature (° C.), RH is the relative humidity (%), SR is the total amount of solar radiation (KW / m ² ), and WS is the average wind speed (m / s). In the present embodiment, since the means for measuring the total amount of solar radiation and the average wind speed are not provided, predetermined coefficients are used for these values. In the present embodiment, the total amount of solar radiation and the average wind speed are calculated assuming SR = 0 (kW · m ² ) and WS = 0 (m / s) assuming indoor work. It should be noted that this predetermined coefficient may be selected as an appropriate value according to the surrounding environment by using, for example, a changeover switch or the like.

The operation of the heat stroke risk determination unit according to the present embodiment will be described with reference to the flowchart of FIG. The heat stroke risk determination unit 310 checks whether or not there is an error in the core body temperature probe 200, and if there is an error, controls the alarm unit 320 so as to display a predetermined error (steps S11 and S21). .. Next, the heat stroke risk determination unit 310 calculates the core body temperature based on the temperature measured by each temperature sensor of the core body temperature probe 200 (step S12), and the calculated core temperature is equal to or higher than a predetermined threshold value (for example, 38 ° C.). In the case of, the alarm unit 320 is controlled so as to display that the body temperature is rising (steps S13 and S14).

Next, the heat stroke risk determination unit 310 measures the WBGT using the WBGT measurement unit 340 (step S15). Then, the heat stroke risk determination unit 310 divides the measured value into a plurality of predetermined bands using a plurality of threshold values, and controls the alarm unit 320 so as to display a different risk degree stepwise according to each band. .. Specifically, it is divided into less than 25 ° C, 25 ° C or more and less than 28 ° C, 28 ° C or more and less than 31 ° C, and 31 ° C or more. The 320 is controlled (steps S16 to S20).

As described above, according to the heat stroke prevention device according to the present embodiment, the risk of heat stroke is determined based on the wearer's core body temperature and WBGT, so that the wearer's surrounding environment and usage environment are affected. It is possible to make an accurate judgment. Other actions and effects are the same as in the first embodiment.

(Third Embodiment)
The heat stroke prevention device according to the third aspect of the present invention will be described with reference to the drawings. FIG. 12 is a functional block diagram of the heat stroke prevention device according to the third embodiment.

As shown in FIG. 12, the heat stroke prevention device according to the present embodiment measures the activity amount of the wearer and detects the fall of the wearer with respect to the heat stroke prevention device according to the first embodiment. The acceleration sensor 350 is provided as a means for the operation. Other components such as the structure of the helmet 10 are the same as those in the first embodiment. Only the differences will be described here. The same modification may be applied to the heat stroke prevention device according to the second embodiment.

The heat stroke risk determination unit 310 aggregates the accelerations detected by the acceleration sensor 350 and calculates the amount of activity of the wearer in the latest predetermined time. Then, the heat stroke risk determination unit 310 refers to various threshold values used at the time of determining the heat stroke risk (thresholds used in comparison with core body temperature in the first embodiment, and further with WBGT in the second embodiment. The threshold used in the comparison) is corrected. Specifically, the threshold value is adjusted to be smaller as the amount of activity is larger. As a result, an appropriate alarm can be given according to the amount of activity of the wearer.

In addition, the heat stroke risk determination unit 310 detects the wearer's fall based on the acceleration detected by the acceleration sensor 350. As the fall detection algorithm, various conventionally known ones can be used. Then, the heat stroke risk determination unit 310 controls the alarm unit 320 to display the fall detection display when the wearer's fall is detected.

As described above, according to the heat stroke prevention device according to the present embodiment, the risk of heat stroke is determined based on the wearer's core body temperature, WBGT, and activity amount, which affects the wearer's surrounding environment and usage environment. An accurate judgment can be made without being made. Other actions and effects are the same as in the first and second embodiments.

(Fourth Embodiment)
The heat stroke prevention device according to the fourth aspect of the present invention will be described with reference to the drawings. FIG. 13 is a functional block diagram of the heat stroke prevention device according to the fourth embodiment.

As shown in FIG. 13, the heat stroke prevention device according to the present embodiment is a means for transmitting various information to a predetermined management device 500 to the heat stroke prevention device according to the first embodiment. A communication unit 360 is provided. Other components such as the structure of the helmet 10 are the same as those in the first embodiment. Only the differences will be described here. The same modification may be applied to the heat stroke prevention device according to the second and third embodiments.

As described above, when the heat stroke risk determination unit 310 controls the alarm unit 320 to issue various alarms, the wireless communication unit 360 transmits the alarms to the predetermined management device 500 via the network 510. The wireless communication unit 360 may transmit all the alarms by the alarm unit 320, or may transmit only a part of the alarms. Further, when transmitting the alarm, the wireless communication unit 360 can transmit the measured value and the calculated value such as the core body temperature and the WBGT together. In addition, the wireless communication unit 360 periodically or in response to a request from the management device 500, measures and calculates values such as core body temperature and WBGT, and the risk degree determined by the heat stroke risk determination unit 310. It can be transmitted to the management device 500.

The management device 500 is a device that manages one or more heat stroke prevention devices 100, and the mounting form thereof does not matter. For example, the management device 500 may be mounted on a so-called cloud server, may be mounted on a computer installed in the company's equipment by the administrator, or may be a mobile terminal owned by the administrator. You may. When the management device 500 receives an alarm from the heat stroke prevention device 100, the management device 500 issues a predetermined alarm. For example, an alarm display may be displayed on the computer, or a notification may be further transmitted from the management device 500 to a predetermined contact.

The form and communication protocol of the network 510 for connecting the heat stroke prevention device 100 and the management device 500 are not limited. For example, when the wireless communication unit 360 has a communication interface with the mobile communication network, it can communicate with the management device 500 via the mobile communication network. Further, for example, when the wireless communication unit 360 has a wireless LAN interface, it can communicate with the management device 500 via the wireless LAN constructed at the work site.

As described above, according to the heat stroke prevention device according to the present embodiment, the alarm of the risk of heat stroke is transmitted to the predetermined management device, so that the manager can manage the physical condition of the wearer. Other actions and effects are the same as those in the first to third embodiments.

(Fifth Embodiment)
The heat stroke prevention device according to the fifth aspect of the present invention will be described with reference to the drawings. FIG. 14 is a functional block diagram of the heat stroke prevention device according to the fifth embodiment.

The heat stroke prevention device according to the present embodiment is a distributed arrangement of each part of the heat stroke prevention device according to the first embodiment. That is, in the heat stroke prevention device 100 according to the present embodiment, as shown in FIG. 14, the helmet 10 includes a core body temperature probe 200, a power supply unit 330, and a storage unit 300 including a short-range wireless communication unit 370. Is provided. On the other hand, a short-range wireless communication unit 610, a power supply unit 620, a heat stroke risk determination unit 310, and an alarm unit 320 are mounted on a second device 600 separate from the storage unit 300. Only the differences will be described here. The same modification may be applied to the heat stroke prevention device according to the second to fourth embodiments.

The second device 600 may be mounted on dedicated hardware or may be mounted on a general-purpose mobile computer. As a typical example of the latter case, it is preferable to use a multifunctional mobile phone called a so-called smartphone. In this case, the short-range wireless communication units 370 and 610 can use a standard communication standard such as Bluetooth (registered trademark). Further, the alarm unit 320 can use a display, a speaker, or the like of a multifunctional mobile phone. The mounting position of the second device 600 does not matter as long as it is carried by the wearer. For example, it can be attached to a waist belt.

When applying this modification to the second embodiment, it is preferable that the WBGT measurement unit 340 is provided in the storage unit 300. Further, when applying this modification to the third embodiment, it is preferable that the acceleration sensor 350 is arranged in the second device 600. Specifically, it is preferable to use the acceleration sensor of the multifunctional mobile phone. Further, when applying the present modification to the third embodiment, it is preferable that the wireless communication unit 360 is arranged in the second device 600. Specifically, it is preferable to use the communication function of the multifunctional mobile phone.

As described above, according to the heat stroke prevention device according to the present embodiment, the storage portion 300 arranged in the helmet 10 can be miniaturized, so that the convenience is improved. In addition, since a general-purpose multifunctional mobile phone can be diverted, the cost can be reduced. Other actions and effects are the same as those in the first to fourth embodiments.

Although the first to fifth embodiments of the present invention have been described in detail above, the present invention is not limited thereto. For example, in the first to fifth embodiments, the case where the helmet is used as the head wearing tool has been described, but other devices may be used. For example, a hair band, which is an accessory worn on the head, can be used. The hair band may be a stretchable band-shaped cloth, rubber, or the like formed in an annular shape, or may be a so-called headband in which a hard resin or metal is formed in a substantially C shape. The core body temperature probe 200 is attached to the hair band so as to abut on the forehead, forehead, temples, and the like. When a hair band is used, it is preferable to implement it as a modification of the fifth embodiment.

In addition, unlike field helmets, other types of helmets that do not have a hammock or headband inside, such as nursing helmets, baseball helmets, automobile helmets, motorcycle helmets, and bicycle helmets, can also be used. it can. It is also possible to use helmets and headgear for nursing care and medical use. You can also use a headband or other common hats.

10 ... Helmet 11 ... Cap body 12 ... Liner 13 ... Hammock 14 ... Headband 200 ... Deep body temperature probe 210 ... Insulation material 221,222,223,224 ... Temperature sensor 230 ... Cover 240 ... Projection 250 ... Dummy protrusion 300 ... Storage unit 301 ... Charging terminal 310 ... Heat stroke risk determination unit 320 ... Alarm unit 330 ... Power supply unit 340 ... WBGT measurement unit 350 ... Acceleration sensor 360 ... Wireless communication unit 370 ... Short-range wireless communication unit 400 ... Charging device 410 ... Hook 411 ... Charging terminal 500 ... Management device 510 ... Network 600 ... Second device 610 ... Short-range wireless communication unit

Claims (5)

A deep body temperature probe that is attached to the inside of the head wearer to be worn on the human head and abuts on the wearer's head to measure the wearer's core body temperature.
A heat stroke risk determination means for determining the risk of a wearer suffering from heat stroke based on the core body temperature measured by the core body temperature probe.
It is provided with an alarm means for issuing an alarm according to the degree of danger determined by the heat stroke risk determination means.
The head fitting comprises a cap body and a helmet equipped with a hammock and a headband arranged inside the cap body.
The heat stroke prevention device, characterized in that the core body temperature probe is attached to the headband or hammock. The heat stroke prevention device according to claim 1, wherein the heat stroke risk determination means is provided inside a rear portion of the cap body and in a storage portion arranged in a gap between the cap body and the hammock. Further, a secondary battery arranged in the storage unit and
The heat stroke prevention device according to claim 2, further comprising a power transmission means for supplying electric power for charging the secondary battery from the outside, which is provided in the storage portion. In addition, it is equipped with a WBGT measuring means.
The heat stroke risk determination means is characterized in that the wearer determines the risk of heat stroke based on the core body temperature measured by the core body temperature probe and the WBGT measured by the WBGT measuring means. Item 3. The heat stroke prevention device according to any one of Items 1 to 3 . In addition, it is equipped with an acceleration sensor
The invention according to any one of claims 1 to 4, wherein the heat stroke risk determination means adjusts parameters used in a process for determining the risk of suffering from heat stroke based on a value detected by an acceleration sensor. Heat stroke prevention device.

Images