WO2020184686A1

WO2020184686A1 - Head-mounted device, heatstroke preventing system, and re-hydration alert system

Info

Publication number: WO2020184686A1
Application number: PCT/JP2020/010962
Authority: WO
Inventors: 橋元　伸晃; 組田　良則; 敏仁近藤
Original assignee: 公立大学法人公立諏訪東京理科大学; 株式会社フジタ; 株式会社高環境エンジニアリング
Priority date: 2019-03-13
Filing date: 2020-03-12
Publication date: 2020-09-17
Also published as: JP2024110962A; JPWO2020184686A1; JP7495064B2

Abstract

Provided is a head-mounted device capable of measuring, with increased accuracy, a state of the body of a wearer required for estimating the probability of coming down with a heatstroke. The head-mounted device is provided with: a head-covering member covering the head of the wearer and having air-breathability; a fan which is disposed on the outside or inside of the head-covering member and blows or suctions air; a first humidity sensor for measuring the absolute humidity of intake air that enters the fan or the head-covering member; and a second humidity sensor for measuring the absolute humidity of discharged air exiting the head-covering member or the fan.

Description

Head-mounted device, heat stroke prevention system and hydration warning system

This disclosure relates to a head-mounted device, a heat stroke prevention system, and a hydration warning system.

In a high temperature environment, it is necessary to prevent heat stroke. Conventionally, there has been known a device to be worn by a worker in order to prevent heat stroke of a worker engaged in work such as a construction site. For example, Patent Document 1 describes a helmet including a temperature sensor and a humidity sensor. According to the helmet of Patent Document 1, since the manager can grasp the situation inside the helmet, it is possible to contact the operator when an abnormality occurs. Non-Patent Document 1 describes signs that it is necessary to stop exposure to heat. Non-Patent Document 2 describes the symptoms of heat stroke.

Japanese Unexamined Patent Publication No. 2017-115275

However, the helmet of Patent Document 1 merely measures the temperature and humidity inside the helmet. For this reason, there is a limit to accurately detecting the physical condition of the wearer who is the worker, which is necessary for estimating the possibility of heat stroke, such as the amount of decrease in the amount of water in the body of the worker. Therefore, it is difficult to improve the estimation accuracy of the possibility of heat stroke. In addition, not only workers but also ordinary people who perform activities and exercise outdoors may suffer from heat stroke. Therefore, it is desirable that it can be worn not only by a helmet but also by the general public.

The present disclosure has been made in view of the above problems, and provides a head-mounted device capable of measuring the physical condition of the wearer with higher accuracy, which is necessary for estimating the possibility of heat stroke. With the goal.

In order to achieve the above object, the head wearing device of one aspect of the present disclosure is arranged outside or inside the head covering member having a breathability and covering the head of the wearer and the head covering member. , The fan that blows or sucks, the first humidity sensor for measuring the absolute humidity of the intake air that enters the fan or the head covering member, and the absolute humidity of the exhaust air that comes out of the head covering member or the fan. It is provided with a second humidity sensor for measuring.

As a desirable embodiment of the head-mounted device, the housing, the fan, the sensor unit having the first humidity sensor and the second humidity sensor are provided, and the fan, the first humidity sensor and the second humidity sensor are described. Supported by the housing.

As a desirable embodiment of the head mounting device, the sensor unit is removable from the head covering member.

As a preferred embodiment of the head mounting device, a tube member having one end arranged outside the head covering member and the other end arranged inside the head covering member is provided, and the fan includes the one end and the other. Air is blown from one end to the other, the first humidity sensor measures the absolute humidity of the intake air entering the pipe member from one of the one end and the other end, and the second humidity sensor measures the absolute humidity of the intake air from one end and the other end. Measure the absolute humidity of the exhaust air from the other end.

As a desirable embodiment of the head mounting device, an intermediate covering member provided in the gap between the wearer's head and the head covering member and having a through hole is provided.

As a preferred embodiment of the head-mounted device, the fan sends air from one end toward the other end and is located at the upstream end of the tube member, and the first humidity sensor is upstream of the fan. Located in.

As a desirable embodiment of the head mounting device, the first humidity sensor is located outside the head covering member.

As a preferred embodiment of the head-mounted device, the fan sends air from one end toward the other end and is located at the upstream end of the tube member, and the second humidity sensor is downstream of the fan. Located in.

As a desirable embodiment of the head mounting device, the second humidity sensor is located on the inner surface of the head covering member.

As a desirable embodiment of the head-mounted device, the first humidity sensor measures the temperature and relative humidity of the intake air, and the second humidity sensor measures the temperature and relative humidity of the exhaust air.

As a desirable embodiment of the head-mounted device, the fan blows air at an air volume such that the temperature of the exhaust air is equal to or higher than the dew point temperature of the exhaust air.

As a desirable embodiment of the head wearing device, a body temperature sensor for measuring the body temperature of the wearer is provided.

As a desirable embodiment of the head-mounted device, the body temperature sensor measures core body temperature.

As a desirable embodiment of the head wearing device, a heart rate sensor for measuring the heart rate of the wearer is provided.

As a desirable embodiment of the head-mounted device, an environmental sensor for measuring the wet-bulb temperature and the black-ball temperature around the wearer is provided.

As a desirable mode of the head mounting device, an air volume measuring device for measuring the air volume of the fan is provided.

As a preferred embodiment of the head-mounted device, the air volume measuring device includes an air volume sensor provided at an air inlet or outlet of the fan.

As a desirable embodiment of the head-mounted device, the air volume measuring device includes a pressure sensor for measuring the differential pressure of the fan, and includes a control device that calculates the air volume of the fan based on the information obtained from the pressure sensor. ..

As a desirable embodiment of the head-mounted device, the air volume measuring device includes a detection mechanism for detecting a power supply voltage for driving the fan, and includes a control device for calculating the air volume of the fan based on the information obtained from the detection mechanism. ..

As a desirable embodiment of the head-mounted device, a control device for calculating the amount of sweating of the wearer based on the information obtained from the first humidity sensor and the second humidity sensor is provided.

As a desirable embodiment of the head-mounted device, the salt concentration sensor for measuring the salt concentration of the wearer's sweat, and the information obtained from the salt concentration sensor, the first humidity sensor, and the second humidity sensor are used. It is provided with a control device for calculating the amount of salt loss of the wearer.

As a desirable embodiment of the head-mounted device, an alarm device for issuing an alarm when the transition of the sweating amount satisfies a predetermined condition is provided.

As a desirable embodiment of the head-mounted device, an alarm device for issuing an alarm when the transition of the salt loss amount satisfies a predetermined condition is provided.

The heat stroke prevention system of one aspect of the present disclosure includes the head-mounted device and the management device described above, and the head-mounted device includes information obtained from the first humidity sensor and the second humidity sensor. The management device includes a communication device that transmits information from the communication device, and stores the amount of sweating of the wearer by receiving information from the communication device.

As a desirable embodiment of the heat stroke prevention system, an alarm device for issuing an alarm to the administrator when the transition of the sweating amount satisfies a predetermined condition is provided.

As a desirable embodiment of the heat stroke prevention system, the head-mounted device includes an alarm device that issues an alarm to the wearer when the transition of the amount of sweating satisfies a predetermined condition.

As a desirable embodiment of the heat stroke prevention system, the above-mentioned head-mounted device and the management device are provided, and the head-mounted device is obtained from the salt concentration sensor, the first humidity sensor, and the second humidity sensor. The management device includes a communication device that transmits the information by wireless communication, and the management device receives information from the communication device and stores the amount of salt loss of the wearer.

As a desirable embodiment of the heat stroke prevention system, an alarm device for issuing an alarm to the administrator when the transition of the salt loss amount satisfies a predetermined condition is provided.

As a desirable embodiment of the heat stroke prevention system, the head-mounted device includes an alarm device that issues an alarm to the wearer when the transition of the salt loss amount satisfies a predetermined condition.

The hydration warning system of one aspect of the present disclosure includes the head-mounted device and the management device described above, and the head-mounted device includes information obtained from the first humidity sensor and the second humidity sensor. The management device includes a communication device that transmits information from the communication device, and stores the amount of sweating of the wearer by receiving information from the communication device.

As a desirable embodiment of the hydration warning system, an alarm device for issuing an alarm to the administrator when the transition of the sweating amount satisfies a predetermined condition is provided.

As a desirable embodiment of the hydration warning system, the head-mounted device includes an alarm device that issues an alarm to the wearer when the transition of the amount of sweating satisfies a predetermined condition.

The hydration warning system of one aspect of the present disclosure includes the above-mentioned head-mounted device and the management device, and the head-mounted device includes the salt concentration sensor, the first humidity sensor, and the second humidity sensor. The management device includes a communication device that transmits information obtained from the above communication device by wireless communication, and the management device receives information from the communication device and stores the amount of salt loss of the wearer.

As a desirable embodiment of the hydration warning system, an alarm device for issuing an alarm to the administrator when the transition of the salt loss amount satisfies a predetermined condition is provided.

As a desirable embodiment of the hydration warning system, the head-mounted device includes an alarm device that issues an alarm to the wearer when the transition of the salt loss amount satisfies a predetermined condition.

According to the present disclosure, it is possible to provide a head wearing device capable of measuring the physical condition of the wearer with higher accuracy, which is necessary for estimating the possibility of heat stroke.

FIG. 1 is a schematic diagram of the heat stroke prevention system of the first embodiment. FIG. 2 is a schematic diagram of the heat stroke prevention system of the second embodiment. FIG. 3 is a schematic view of the sensor unit of the second embodiment. FIG. 4 is a schematic diagram of the heat stroke prevention system of the third embodiment.

Hereinafter, this disclosure will be described in detail with reference to the drawings. The present disclosure is not limited to the embodiment for carrying out the present disclosure (hereinafter referred to as the embodiment). In addition, the components in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, that is, those in a so-called equal range. Further, the components disclosed in the following embodiments can be appropriately combined.

(First Embodiment)
FIG. 1 is a schematic diagram of the heat stroke prevention system of the first embodiment. The heat stroke prevention system 1 of the present embodiment is a system for suppressing the onset of heat stroke of workers and the like. The heat stroke prevention system 1 is applied to workers at construction sites, for example. The heat stroke prevention system 1 is a hydration warning system that warns the worker that hydration should be performed, instructs the worker to rehydrate, or urges or instructs the worker to take a break. It is also 1. As shown in FIG. 1, the heat stroke prevention system 1 includes a head-mounted device 10 and a management unit 9.

The head mounting device 10 is a device mounted on the worker's head. In the following description, a person who wears the head wearing device 10 is referred to as a wearer. For example, the head-mounted device 10 of the present embodiment is a hat. As shown in FIG. 1, the head mounting device 10 includes a head covering member 2, an intermediate covering member 3, a sensor unit 4, a fan 6, a battery 16, a first humidity sensor 52, and a second humidity. The sensor 54, the air volume sensor 56, the environment sensor 58, the salt concentration sensor 72, the body temperature sensor 74, the heart rate sensor 76, the control device 11, the alarm device 12, the communication device 13, and the antenna 14. Be prepared.

The head covering member 2 is a member that covers the wearer's head and is hemispherical. The head covering member 2 has breathability. The sweat generated on the wearer's head becomes water vapor and passes through the head covering member 2 without being blocked by the head covering member 2. The head covering member 2 includes a main body 20 and a collar 21. The main body 20 is made of, for example, cloth. The collar 21 is integrally formed with the main body 20, and protrudes from the lower end 201 of the main body 20 in a direction away from the wearer. In the following description, the region outside the substantially hemispherical region surrounded by the head covering member 2 is referred to as the outer E.

The intermediate covering member 3 is a member facing the wearer's head. The intermediate covering member 3 is provided in the gap between the wearer's head and the head covering member 2. The intermediate covering member 3 may be detachable from the head covering member 2. The intermediate covering member 3 is made of, for example, a synthetic resin or the like. The intermediate covering member 3 is provided with a plurality of through holes 31 and covers a part of the wearer's head. The sweat generated on the wearer's head becomes water vapor and passes through the intermediate covering member 3 without being blocked by the intermediate covering member 3. The intermediate covering member 3 may cover the entire head, but in such a case, the intermediate covering member 3 is made of a moisture-permeable material.

The sensor unit 4 includes a housing 42, a pipe member 44, a support member 46, and a subunit 7. Fan 6, first humidity sensor 52, second humidity sensor 54, air volume sensor 56, environment sensor 58, salinity sensor 72, body temperature sensor 74, heart rate sensor 76, control device 11, alarm device 12, communication device 13, antenna 14 And the battery 16 are provided in the sensor unit 4.

The housing 42 is attached to the outer surface of the head covering member 2. The housing 42 has an intake port 421 for sucking air and an air outlet 422 for sending out air. On the outside of the housing 42, a first humidity sensor 52, an environment sensor 58, and an antenna 14 are attached in the vicinity of the intake port 421. A fan 6, an air volume sensor 56, a control device 11, an alarm device 12, a communication device 13, and a battery 16 are mounted inside the housing 42. In the first embodiment, the air volume sensor 56 is attached to the air outlet side of the fan 6. The air volume sensor 56 may be attached to the air inlet side of the fan 6.

One end 441 of the pipe member 44 is arranged on the outer E of the head covering member 2. One end 441 of the pipe member 44 is connected to the air outlet 422 of the housing 42. The other end 442 of the tube member 44 is arranged inside the head covering member 2. The other end 442 of the tube member 44 is connected to the inner lower end of the head covering member 2.

The support member 46 is fixed to the housing 42. The support member 46 is provided along the inner surface of the intermediate covering member 3 from the lower end portion of the head covering member 2 upward. The head covering member 2 and the intermediate covering member 3 are sandwiched between the support member 46 and the housing 42. A second humidity sensor 54 is attached to the upper end of the support member 46.

The subunit 7 is, for example, a plate-shaped member. A salinity sensor 72, a body temperature sensor 74, and a heart rate sensor 76 are attached to one surface of the subunit 7. The subunit 7 is attached to the inner surface of the intermediate covering member 3 so that the surface on which the salinity sensor 72, the body temperature sensor 74, and the heart rate sensor 76 are attached faces the head of the wearer. The subunit 7 is connected to the housing 42. The subunit 7 is connected to the housing 42 by a cable 78.

It is preferable that the housing 42 is removable from the head covering member 2. It is preferable that the subunit 7 is removable from the intermediate covering member 3. It is preferable that the sensor unit 4 is detachable from the head covering member 2 and the intermediate covering member 3.

The fan 6 is provided in the sensor unit 4. The fan 6 is arranged inside the housing 42. In the present embodiment, the fan 6 guides the air sucked from the intake port 421 of the housing 42 to the pipe member 44 via the air outlet 422. The fan 6 sends air from one end 441 of the pipe member 44 toward the other end 442. That is, the fan 6 is located at the upstream end of the pipe member 44. Air enters the housing 42 from the outside E, passes through the inside of the pipe member 44 and the head covering member 2, passes through the surface of the head covering member 2, and is discharged to the outside E. When the wearer sweats, water vapor is supplied to the inside of the head covering member 2. Air containing water vapor due to sweat passes through the surface of the head covering member 2 and is discharged to the outside E.

The air volume of the fan 6 is measured by the air volume sensor 56. The fan 6 can be adjusted manually or by a control circuit included in the control device 11 described later so that the air volume becomes a predetermined value. The fan 6 is adjusted so that the temperature of the exhaust air leaking from the surface of the head covering member 2 is equal to or higher than the dew point temperature of the exhaust air. That is, the fan 6 is adjusted so as to blow air at an air volume that does not cause dew condensation around the exhaust air. The minimum air volume of the fan 6 is preferably an air volume such that the exhaust air is at least the dew point temperature. This is because, in general, a humidity sensor cannot measure the humidity of air having a relative humidity higher than 100% (humidity of air having a dew point temperature or less). In order to reduce the relative humidity of the exhaust air to 100% or less, the control device 11 may increase the air volume of the fan 6 so that the temperature measured by the second humidity sensor 54, which will be described later, is equal to or higher than the dew point temperature. When used in an environment where the relative humidity of the exhaust air does not reach 100%, which is a general work environment (in an environment where dew condensation does not occur around the exhaust air), it is resistant to the heat of the wearer. Even if the air volume of the fan 6 is simply and manually set to the desired air volume according to the resistance and the amount of perspiration, the exhaust air becomes the dew point or higher. Therefore, the second humidity sensor 54, which will be described later, can accurately measure the absolute humidity. The minimum air volume of the fan 6 is preferably 0.01 l / min or more so that the air on the surface of the second humidity sensor 54 is replaced. The air volume of the fan 6 is more preferably 0.01 l / min or more and 500 l / min or less.

The battery 16 supplies electric power to the fan 6, the first humidity sensor 52, the second humidity sensor 54, the body temperature sensor 74, the heart rate sensor 76, the environment sensor 58, the control device 11, the alarm device 12, the communication device 13, and the antenna 14. .. The control device 11, the alarm device 12, the communication device 13, and the antenna 14 may be formed on an integrated substrate.

The first humidity sensor 52 is a sensor for measuring the absolute humidity of the intake air entering the pipe member 44 (hereinafter referred to as the first absolute humidity). Absolute humidity is the amount of water vapor contained in air per unit volume. The first humidity sensor 52 is located upstream of the fan 6. The first humidity sensor 52 is located on the outside E. For example, the first humidity sensor 52 is attached to the outer surface of the housing 42. The first humidity sensor 52 measures the temperature and relative humidity of the air outside E.

The second humidity sensor 54 is a sensor for measuring the absolute humidity of the exhaust air emitted from the surface of the head covering member 2 (hereinafter referred to as the second absolute humidity). The second humidity sensor 54 is located downstream of the fan 6. The second humidity sensor 54 is located inside the head covering member 2. For example, the second humidity sensor 54 is attached to the inner surface 202 of the main body 20 of the head covering member 2. The second humidity sensor 54 may be attached to the outer surface of the main body 20. The second humidity sensor 54 measures the temperature and relative humidity of the air inside the head covering member 2.

The air volume sensor 56 is a sensor for measuring the air volume of the fan 6. The air volume sensor 56 is attached to the air outlet side of the fan 6. The air volume sensor 56 may be attached to the air inlet side of the fan 6. The air volume measuring device for measuring the air volume of the fan 6 is not limited to the air volume sensor 56. The air volume measuring device may include a pressure sensor for measuring the differential pressure of the fan 6. The air volume of the fan 6 is calculated by the control device 11 described later based on the information obtained from the pressure sensor. The air volume measuring device may include a detection mechanism for detecting the power supply voltage for driving the fan 6. The air volume of the fan 6 is calculated by the control device 11 described later based on the information obtained from the detection mechanism.

The environmental sensor 58 is a sensor that measures the wet-bulb temperature, the dry-bulb temperature, and the black-bulb temperature around the wearer. As shown in FIG. 1, the environment sensor 58 is attached to the outer surface of the housing 42.

The salt concentration sensor 72 is a sensor for measuring the salt concentration of the wearer's sweat. The salinity sensor 72 is attached to the subunit 7. The salinity sensor 72 is in contact with the wearer. The salinity sensor 72 preferably comes into contact with the wearer's skin. It is more preferable that the salinity sensor 72 is attached so as to be in contact with the wearer's forehead.

The body temperature sensor 74 is a sensor that measures the body temperature of the wearer. The body temperature sensor 74 is attached to the subunit 7. The body temperature sensor 74 is in contact with the wearer. Further, it is more preferable that the body temperature sensor 74 can measure the core body temperature of the wearer. Examples of core body temperature include oral temperature, rectal temperature, and eardrum temperature. When the body temperature sensor 74 measures the core body temperature, the mounting position of the body temperature sensor 74 is appropriately adjusted.

The heart rate sensor 76 is a sensor that measures the wearer's heart rate. The heart rate sensor 76 is attached to the subunit 7. The heart rate sensor 76 is in contact with the wearer. The heart rate sensor 76 preferably comes into contact with the wearer's temples.

The control device 11 is a computer, and includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an input interface, and an output interface. The control device 11 is electrically connected to the first humidity sensor 52, the second humidity sensor 54, the air volume sensor 56, the salinity sensor 72, the body temperature sensor 74, the heart rate sensor 76, and the environment sensor 58, and receives the measured values. To do. The control device 11 calculates medical parameters based on the information obtained from each sensor. For example, the control device 11 calculates the amount of sweating as a medical parameter. It is preferable that the control device 11 calculates fluctuations in sweating amount, fluctuations in core body temperature, heartbeat intervals, and the like. Further, the control device 11 indexes the work environment and the risk of heat stroke of the wearer from the information obtained from each of the above-mentioned sensors and the calculated medical parameters, and the alarm device 12 or the communication device 13 is based on the index. It is preferable to control. Further, the control device 11 is electrically connected to the fan 6, and the air volume of the fan 6 may be controlled. The control device 11 is mounted inside the housing 42.

The control device 11 stores information about the wearer, such as the weight, age, work place, and work process of the wearer. For example, the control device 11 can obtain information about the wearer stored in the management device 91, which will be described later, via the communication device 13. Alternatively, information about the wearer may be directly input to the control device 11 before the work.

The control device 11 calculates the first absolute humidity based on the temperature and relative humidity of the intake air received from the first humidity sensor 52. There are various approximate formulas for estimating absolute humidity from relative humidity, but here we will use the relatively commonly used Tetens formula to estimate the first absolute humidity at X [g / m ³ ] and intake air. When the temperature of the intake air is t _A [K], the relative humidity of the intake air is RH _A [%], and the saturated water vapor pressure of the intake air is e _A [hPa], the control device 11 has the following equations (1) and (1). Get X from 2).

The control device 11 calculates the mass of water entering the pipe member 44 per unit time based on the first absolute humidity (X) and the air volume of the fan 6 received from the air volume sensor 56. When the mass of water entering the pipe member 44 per unit time is A [g / min] and the air volume of the fan 6 is V [m ³ / min], the control device 11 obtains A from the following equation (3). ..

The control device 11 calculates the second absolute humidity based on the temperature and relative humidity of the exhaust air received from the second humidity sensor 54. The second absolute humidity was Y [g / m ³ ], the temperature of the exhaust air was t _B [K], the relative humidity of the exhaust air was RH _B [%], and the saturated water vapor pressure of the exhaust air was e _B [hPa]. In this case, the control device 11 obtains Y from the following equations (4) and (5).

The control device 11 calculates the sum of the masses of the water leaking from the surface of the head covering member 2 per unit time based on the second absolute humidity (Y) and the air volume of the fan 6. When the sum of the masses of the water is B [g / min], the control device 11 obtains B from the following equation (6).

When the mass of water evaporated from the wearer's head per unit time is C [g / min], the control device 11 obtains C from the following equation (7). In the following description, the mass (C) of water evaporated from the wearer's head per unit time is described as the amount of perspiration.

The control device 11 calculates and stores the amount of sweating at predetermined intervals. The control device 11 determines whether or not the wearer may suffer from heat stroke based on the transition of the amount of sweating. The control device 11 determines that the wearer may suffer from heat stroke when the change in the amount of sweating satisfies a predetermined condition. For example, the control device 11 stores a predetermined threshold value for the amount of sweating, and determines that the wearer may suffer from heat stroke when the amount of sweating exceeds the threshold value. Alternatively, the control device 11 stores a predetermined threshold value and the number of thresholds for the amount of sweating, and when the number of times the amount of sweating exceeds the threshold exceeds the number of thresholds, the wearer may suffer from heat stroke. Judge that there is.

Alternatively, the control device 11 integrates the amount of sweating and determines that the wearer may suffer from heat stroke when the accumulated amount of sweating exceeds the threshold value. The threshold value in this case is, for example, a mass corresponding to 1.5% of the wearer's body weight (see Non-Patent Document 1). The amount of weight loss of the wearer can be measured by the amount of sweating of the wearer's whole body. In order to prevent heat stroke, it is preferable to set a value smaller than the above-mentioned threshold value as the threshold value. The control device 11 can calculate the amount of sweating on the head, but by storing the correlation between the amount of sweating on the head and the amount of sweating on the whole body in advance, the amount of sweating on the whole body (the amount of weight loss) is converted from the amount of sweating on the head. ) Can be estimated. Alternatively, the control device 11 stores a threshold value for the amount of perspiration accumulated within the predetermined time, and when the amount of perspiration accumulated within the predetermined time exceeds the threshold value, the wearer may suffer from heat stroke. Is determined. Alternatively, the control device 11 stores a first threshold value regarding the accumulated sweating amount within a predetermined time and a second threshold value regarding the wet-bulb temperature (or dry-bulb temperature) around the wearer, and the first threshold value is used. The possibility that the wearer will suffer from heat stroke is determined based on the second threshold value. For example, the control device 11 determines that the wearer may suffer from heat stroke when the wet-bulb temperature exceeds the second threshold value and the amount of perspiration accumulated within a predetermined time is lower than the first threshold value.

The control device 11 determines that the wearer should replenish water when the change in the amount of sweating satisfies a predetermined condition. For example, the control device 11 stores a predetermined threshold value for the whole body sweating amount, and determines that the wearer should replenish water when the whole body sweating amount exceeds the threshold value. The control device 11 calculates the amount of water to be replenished by the wearer based on the information on the amount of sweating. For example, the amount of water to be replenished by the wearer calculated by the control device 11 is the amount of water corresponding to the amount of sweating throughout the body. The amount of water to be replenished by the wearer calculated by the control device 11 may be different from the amount of water corresponding to the amount of whole body sweating.

The control device 11 calculates the amount of salt loss contained in the sweat evaporated from the wearer's head per unit time based on the amount of sweating and the salt concentration of the sweat received from the salt concentration sensor 72. The control device 11 calculates and stores the amount of salt loss at predetermined intervals. The control device 11 determines whether or not the wearer may suffer from heat stroke based on the transition of the amount of salt loss. The control device 11 determines that the wearer may suffer from heat stroke when the change in the amount of salt loss satisfies a predetermined condition. For example, the control device 11 stores a predetermined threshold value for the amount of salt loss, and determines that the wearer may suffer from heat stroke when the amount of salt loss exceeds the threshold value. Alternatively, the control device 11 stores a predetermined threshold value and the number of thresholds for the amount of salt loss, and when the number of times the amount of salt loss exceeds the threshold exceeds the number of thresholds, the wearer suffers from heat stroke. Judge that there is a possibility. The control device 11 may store the average salt concentration of sweat. The control device 11 may calculate the amount of salt loss of the wearer based on the average salt concentration of sweat. The average salt concentration of sweat is a predetermined value stored in advance in the control device 11. The average salt concentration of sweat may be obtained from, for example, the average value of the salt concentration of sweat measured in advance for each wearer a predetermined number of times, or is generally known without installing the salt concentration sensor 72. You may use the value of the salt concentration of sweat. The average salinity in generally known sweat is 0.3% or more and 0.4% or less.

The control device 11 determines whether or not the wearer may suffer from heat stroke based on the transition of body temperature. For example, the control device 11 determines that the wearer may suffer from heat stroke if the body temperature received from the body temperature sensor 74 during the wearer's break does not return to the body temperature before the start of work (Non-Patent Document). 1).

The control device 11 determines whether or not the wearer may suffer from heat stroke based on the transition of the heart rate. For example, the control device 11 determines that the wearer may suffer from heat stroke if the heart rate per minute exceeds the value obtained by subtracting the age of the wearer from 180 for several minutes. Alternatively, the control device 11 determines that the wearer may suffer from heat stroke when the heart rate for one minute exceeds 120 one minute after the peak of the work intensity of the wearer (Non-Patent Document 1). reference).

The control device 11 calculates a heat index (WBGT: Wet-Bub Globe Temperature) based on the information measured by the environment sensor 58. Since the control device 11 stores the work process of the wearer, it knows whether the wearer is outdoors or indoors. When the wearer is outdoors, the control device 11 calculates the heat index based on the wet-bulb temperature, the dry-bulb temperature, and the black-bulb temperature. When the wearer is indoors, the control device 11 calculates the heat index based on the wet-bulb temperature and the black-bulb temperature. The control device 11 can also use the heat index to determine whether or not the wearer may suffer from heat stroke.

In addition, the control device 11 combines the amount of sweating with the information obtained from the salt concentration sensor 72, the body temperature sensor 74, the heart rate sensor 76, and the environmental sensor 58 to determine whether or not the wearer may suffer from heat stroke. You may judge.

The alarm device 12 is a device for making the wearer recognize that he / she may suffer from heat stroke. The alarm device 12 is mounted inside the housing 42. When the control device 11 determines that the wearer may suffer from heat stroke, the alarm device 12 issues an alarm. The type of alarm is not particularly limited. Examples of alarms include sound, light or vibration. Further, the alarm device 12 is a device for making oneself recognize that at least one of hydration and salt supply is necessary. When the control device 11 determines that the wearer should replenish at least one of water and salt, the alarm device 12 issues an alarm. The type of alarm is not particularly limited. Examples of alarms include sound, light or vibration. For example, when the control device 11 determines that the wearer should replenish at least one of the water and salt, the alarm device 12 determines that the wearer should replenish at least one of the water and salt calculated by the control device 11. Display the amount. For example, when the control device 11 determines that the wearer should replenish at least one of water and salt, the alarm device 12 determines at least the amount of water and salt that the wearer should replenish as calculated by the control device 11. Instruct the wearer to take one by voice or the like. Further, in the alarm device 12, at least one of the instructions for hydration and salt supply may be used in combination with, for example, an instruction for prompting a break based on continuous working time.

The communication device 13 and the antenna 14 are devices for transmitting the information obtained by the control device 11 to the management unit 9. The communication device 13 is mounted inside the housing 42. The antenna 14 is attached to the outer surface of the housing 42.

The management unit 9 is a place where there is an administrator who monitors the wearer. The management unit 9 includes a management device 91 and an alarm device 92. The management device 91 receives information from the plurality of head-mounted devices 10. The management device 91 stores information such as a work place, a work process, and an age of a plurality of wearers.

The management device 91 stores the amount of sweating, the amount of salt loss, and the information obtained from each sensor obtained from the control device 11. The management device 91 determines whether or not the wearer may suffer from heat stroke based on the changes in the amount of sweating, the amount of salt loss, the body temperature, the heart rate, and the heat index. The management device 91 determines whether or not the wearer should replenish at least one of water and salt based on the transition of the amount of sweating, the amount of salt loss, the body temperature, the heart rate, and the heat index. The specific determination method may be the same as or different from the determination method of the control device 11.

The alarm device 92 is a device for making the administrator aware that the wearer may suffer from heat stroke. When the management device 91 determines that the wearer may suffer from heat stroke, the alarm device 92 issues an alarm to the manager. The alarm device 92 is a device for making the manager aware that the wearer should replenish at least one of water and salt. When the management device 91 determines that the wearer should replenish at least one of water and salt, the alarm device 92 issues an alarm to the manager. Similar to the alarm device 12, the type of alarm is not particularly limited. Further, in the alarm device 92, at least one of the instructions for hydration and salt supply may be used in combination with, for example, an instruction for prompting a break based on continuous working time.

The materials of the head covering member 2 and the intermediate covering member 3 are merely examples, and are not particularly limited. Further, the head mounting device 10 does not necessarily have to include the intermediate covering member 3.

In the head mounting device 10, the air of the outside E does not necessarily have to enter from the intake port 421 of the housing 42. The air of the outside E may enter from the surface of the head covering member 2 and be discharged from the intake port 421. In such a case, the second humidity sensor 54 is preferably arranged in the vicinity of the intake port 421.

The number of the second humidity sensors 54 included in the head mounting device 10 does not necessarily have to be one. For example, the second humidity sensor 54 may be arranged in the vicinity of the plurality of through holes 31 of the intermediate covering member 3. In such a case, it is preferable that the control device 11 calculates the amount of sweating based on the average of the measurement results of the plurality of second humidity sensors 54.

The head mounting device 10 has one tube member 44 in the present embodiment, but may have a plurality of tube members 44. The pipe member 44 may be branched so as to have one end 441 and a plurality of other ends 442.

When the air volume of the fan 6 is automatically adjusted by the control device 11, the control device 11 may increase the air volume of the fan 6 when the temperature of the exhaust air becomes lower than the dew point temperature. Further, the control device 11 may increase the air volume of the fan 6 as the amount of perspiration increases. Further, the fan 6 may blow air from the air outlet 422 to the intake port 421.

The head-mounted device 10 may not include the air volume sensor 56, the salinity sensor 72, the body temperature sensor 74, the heart rate sensor 76, and the environmental sensor 58. Instead of the air volume sensor 56, the head-mounted device 10 may include a pressure sensor that measures the differential pressure of the fan 6 or a detection mechanism that detects the power supply voltage that drives the fan 6. The head mounting device 10 may measure the air volume in any way as long as it can measure the air volume of the fan 6. In the head mounting device 10, in the present embodiment, the air volume set by the control device 11 is set to V [m ³ / min] as the air volume measured by the air volume measuring device, but the air volume set by the control device 11 is set. May be V [m ³ / min]. That is, the head mounting device 10 does not necessarily have to measure the air volume of the fan 6.

The head-mounted device 10 may include at least a first humidity sensor 52 and a second humidity sensor 54 as sensors. Further, the first humidity sensor 52 and the second humidity sensor 54 do not necessarily have to be sensors for measuring temperature and relative humidity, as long as they can measure absolute humidity. For example, the first humidity sensor 52 and the second humidity sensor 54 may be a moisture meter (infrared moisture meter) using light (near infrared light). Moisture has the property of absorbing near-infrared light of a specific wavelength. The infrared moisture meter measures absolute humidity based on the magnitude of absorbance. The first humidity sensor 52 does not necessarily have to be arranged on the outer surface of the housing 42. The second humidity sensor 54 does not necessarily have to be attached to the support member 46. The second humidity sensor 54 may be attached, for example, in the vicinity of the through hole 31 of the intermediate covering member 3. The environment sensor 58 does not necessarily have to be arranged on the outer surface of the housing 42. The environment sensor 58 may be attached to the outer surface of the head covering member 2, for example.

The control device 11, the alarm device 12, and the communication device 13 do not necessarily have to be arranged inside the housing 42. The control device 11, the alarm device 12, and the communication device 13 may be attached to, for example, the inner surface 211 of the collar 21. The antenna 14 does not necessarily have to be arranged on the outer surface of the housing 42. The antenna 14 may be attached to the outer surface of the collar 21, for example. The salinity sensor 72, the body temperature sensor 74, and the heart rate sensor 76 do not necessarily have to be arranged in the subunit 7. The salinity sensor 72, the body temperature sensor 74, and the heart rate sensor 76 may be attached to the inner surface of the intermediate covering member 3, for example.

The head-mounted device 10 may include a sensor other than the above-mentioned sensor. For example, the head wearing device 10 may include a cerebral blood flow sensor that measures the cerebral blood flow of the wearer. As a cerebral blood flow sensor, a device that non-invasively measures brain function from above the scalp using near infrared light is known. Such a device is called a Near Infrared Spectroscopy (NIRS) brain measuring device. Further, the head mounting device 10 may include an acceleration sensor. As a result, the head wearing device 10 can detect dizziness and the like of the wearer.

The head-mounted device 10 does not have to include the communication device 13 and the antenna 14. Even in such a case, since the head wearing device 10 includes the alarm device 12, the wearer can recognize that he / she may suffer from heat stroke.

The head-mounted device 10 does not have to include the control device 11. In such a case, the information measured by the first humidity sensor 52, the second humidity sensor 54, the air volume sensor 56, the salinity sensor 72, the body temperature sensor 74, the heart rate sensor 76, and the environment sensor 58 is managed via the communication device 13. It is transmitted to the device 91. Then, the management device 91 calculates the amount of sweating based on the above-mentioned formulas (1) to (7), and determines whether or not the wearer may suffer from heat stroke. Even when the head-mounted device 10 includes the control device 11, the management device 91 may calculate the amount of sweating.

The control device 11 and the management device 91 may accumulate information measured by each sensor in the past, and change the criterion for determining whether or not there is a possibility of heat stroke based on the information. Further, the control device 11 and the management device 91 may have artificial intelligence (AI: Artificial Intelligence). By letting artificial intelligence learn the accumulated information, it is possible to improve the accuracy of determining whether or not there is a possibility of heat stroke.

The head-mounted device 10 does not have to include the alarm device 12. The management unit 9 does not have to include the alarm device 92. However, it is preferable that the heat stroke prevention system 1 has at least one of the alarm device 12 and the alarm device 92.

As described above, the head mounting device 10 includes a head covering member 2, a fan 6, a first humidity sensor 52, and a second humidity sensor 54. The head covering member 2 covers the wearer's head and has breathability. The fan 6 is arranged outside E or inside the head covering member 2 and blows or sucks air. The first humidity sensor 52 is a device for measuring the absolute humidity of the intake air entering the fan 6 or the head covering member 2. The second humidity sensor 54 is a device for measuring the absolute humidity of the exhaust air emitted from the head covering member 2 or the fan 6.

As a result, the head wearing device 10 can obtain the amount of sweating on the wearer's head based on the information obtained from the first humidity sensor 52 and the second humidity sensor 54. As a result, the head wearing device 10 can measure the physical condition of the wearer who is the worker, which is necessary for estimating the possibility of heat stroke, with higher accuracy.

Further, the head mounting device 10 includes a sensor unit 4. The sensor unit 4 has a housing 42, a fan 6, a first humidity sensor 52, and a second humidity sensor 54. The fan 6, the first humidity sensor 52, and the second humidity sensor 54 are supported by the housing 42. As a result, for example, by attaching the sensor unit 4 to the head covering member 2, it is possible to obtain the amount of sweating of the wearer's head based on the information obtained from the first humidity sensor 52 and the second humidity sensor 54. .. The head-mounted device 10 can more easily measure the physical condition of the wearer who is an operator, which is necessary for estimating the possibility of heat stroke.

Further, in the head mounting device 10, the sensor unit 4 is removable from the head covering member 2. Thereby, for example, the head covering member 2 can be washed with water or the like.

Further, the head mounting device 10 includes an intermediate covering member 3. The intermediate covering member 3 is provided in the gap between the wearer's head and the head covering member 2, and has a through hole 31. As a result, it is possible to prevent the head covering member 2 from being deformed by the weight of the sensor unit 4 without impairing the air permeability of the head covering member 2.

Further, the head mounting device 10 includes a tube member 44 in which one end 441 is arranged outside E of the head covering member 2 and the other end 442 is arranged inside the head covering member 2. The fan 6 blows air from one end 441 and the other end 442 to the other. The first humidity sensor 52 measures the absolute humidity of the intake air entering the pipe member 44 from one of the one end 441 and the other end 442. The second humidity sensor 54 measures the absolute humidity of the exhaust air emitted from the other of the one end 441 and the other end 442. As a result, the first humidity sensor 52 is less susceptible to the influence of water vapor caused by the wearer's sweat. Further, the second humidity sensor 54 is less likely to be affected by the outside air. Therefore, the accuracy of the absolute humidity obtained from the first humidity sensor 52 and the second humidity sensor 54 is improved.

Further, in the head mounting device 10, the fan 6 sends air from one end 441 to the other end 442 and is located at the upstream end of the pipe member 44. The first humidity sensor 52 is located upstream of the fan 6.

As a result, the first humidity sensor 52 is less susceptible to the influence of water vapor caused by the wearer's sweat. Therefore, the accuracy of the absolute humidity obtained by the first humidity sensor 52 is improved.

Further, in the head mounting device 10, the first humidity sensor 52 is located outside E of the head covering member 2.

Further, in the head mounting device 10, the fan 6 sends air from one end 441 to the other end 442 and is located at the upstream end of the pipe member 44. The second humidity sensor 54 is located downstream of the fan 6.

As a result, the air containing water vapor due to sweat is agitated by the fan 6, so that the distribution of absolute humidity tends to be uniform downstream of the fan 6. Further, when there are a plurality of other ends 442 of the pipe member 44, the difference in absolute humidity between the pipe members 44 is suppressed. Therefore, the accuracy of the absolute humidity obtained by the second humidity sensor 54 is improved.

Further, in the head mounting device 10, the second humidity sensor 54 is located on the inner surface (for example, the inner surface 202) of the head covering member 2.

As a result, the head covering member 2 blocks the sunlight, which makes it difficult for the second humidity sensor 54 to receive the sunlight. Since the temperature of the exhaust air measured by the second humidity sensor 54 is less likely to cause an error, the accuracy of the absolute humidity obtained by the second humidity sensor 54 is improved.

Further, in the head-mounted device 10, the first humidity sensor 52 measures the temperature and relative humidity of the intake air, and the second humidity sensor 54 measures the temperature and relative humidity of the exhaust air.

Since the absolute humidity can be calculated from the temperature and the relative humidity, the absolute humidity of the intake air and the exhaust air of the head mounting device 10 can be calculated. This makes it possible to more preferably estimate the amount of sweating of the wearer.

Further, in the head mounting device 10, the fan 6 blows air at an air volume such that the temperature of the exhaust air is equal to or higher than the dew point temperature of the exhaust air.

As a result, the relative humidity of the exhaust air becomes less than 100%. Condensation due to moisture contained in the exhaust air is suppressed. Therefore, the accuracy of the absolute humidity obtained by the second humidity sensor 54 is improved. As a result, the head-mounted device 10 can improve the accuracy of measuring the amount of sweating.

Further, the head wearing device 10 includes a body temperature sensor 74 that measures the body temperature of the wearer. As a result, the head wearing device 10 can measure the physical condition of the wearer with higher accuracy.

Further, in the head wearing device 10, the body temperature sensor 74 measures the core body temperature. As a result, the head wearing device 10 can measure the physical condition of the wearer with higher accuracy.

Further, the head wearing device 10 includes a heart rate sensor 76 that measures the heart rate of the wearer. As a result, the head wearing device 10 can measure the physical condition of the wearer with higher accuracy.

In addition, the head mounting device 10 includes an environmental sensor 58 that measures the wet-bulb temperature and the black-bulb temperature around the wearer. As a result, the head wearing device 10 can measure the physical condition of the wearer with higher accuracy.

Further, the head mounting device 10 includes an air volume measuring device for measuring the air volume of the fan 6. This makes it possible to correct the air volume by real-time measurement. Since the sweating amount of the wearer's head can be calculated based on a more accurate air volume value, the sweating amount of the wearer's head can be more preferably obtained. As a result, the head wearing device 10 can measure the physical condition of the wearer who is the worker, which is necessary for estimating the possibility of heat stroke, with higher accuracy.

Further, in the head mounting device 10, the air volume measuring device is an air volume sensor 56 provided at the air inlet or the air outlet of the fan 6. As a result, the air volume of the fan 6 can be easily measured.

Further, the head mounting device 10 calculates the air volume of the fan 6 based on the pressure sensor for measuring the differential pressure between the air inlet and the outlet of the fan 6 and the information obtained from the pressure sensor instead of the air volume sensor 56. The control device 11 and the like may be provided. As a result, the air volume of the fan 6 can be easily measured.

Further, the head mounting device 10 has a detection mechanism that detects the power supply voltage that drives the fan 6 instead of the air volume sensor 56, and a control device 11 that calculates the air volume of the fan 6 based on the information obtained from the detection mechanism. May be provided. As a result, the air volume of the fan 6 can be easily measured.

Further, the head wearing device 10 includes a control device 11 that calculates the sweating amount of the wearer based on the information obtained from the first humidity sensor 52 and the second humidity sensor 54.

Since a large amount of sweating is an initial symptom of heat stroke (see Non-Patent Document 2), the head wearing device 10 can detect whether or not the wearer has an initial symptom of heat stroke. That is, the head-mounted device 10 can detect heat stroke at an early stage. The head-mounted device 10 can improve the estimation accuracy of the possibility of heat stroke.

Further, the head-mounted device 10 includes a salt concentration sensor 72 and a control device 11. The salt concentration sensor 72 is a device for measuring the salt concentration of the wearer's sweat. The control device 11 calculates the amount of salt loss of the wearer based on the information obtained from the salt concentration sensor 72, the first humidity sensor 52, and the second humidity sensor 54. As a result, in addition to the amount of sweating on the wearer's head, the amount of salt loss can be obtained. As a result, the head wearing device 10 can measure the physical condition of the wearer who is the worker, which is necessary for estimating the possibility of heat stroke, with higher accuracy.

Further, the head-mounted device 10 includes an alarm device 12 that issues an alarm when the transition of the amount of sweating satisfies a predetermined condition. This allows the wearer to recognize early on that he or she may suffer from heat stroke. Therefore, the head-mounted device 10 can suppress the aggravation of heat stroke.

Further, the head-mounted device 10 includes an alarm device 92 that issues an alarm when the transition of the salt loss amount satisfies a predetermined condition. This allows the wearer to recognize early on that he or she may suffer from heat stroke. Therefore, the head-mounted device 10 can suppress the aggravation of heat stroke.

Further, the heat stroke prevention system 1 includes a head-mounted device 10 and a management device 91. The head-mounted device 10 includes a communication device 13 that transmits information obtained from the first humidity sensor 52 and the second humidity sensor 54 by wireless communication. The management device 91 receives information from the communication device 13 and stores the sweating amount of the wearer.

As a result, the management device 91 can detect whether or not the wearer at a distant place has the initial symptom of heat stroke. That is, the heat stroke prevention system 1 can detect heat stroke at an early stage. The heat stroke prevention system 1 can improve the estimation accuracy of the possibility of heat stroke. The manager can recognize from the management device 91 that the wearer may suffer from heat stroke. Therefore, the heat stroke prevention system 1 can suppress the aggravation of heat stroke.

Further, the heat stroke prevention system 1 is provided with an alarm device 92 that issues an alarm to the administrator when the transition of the amount of sweating satisfies a predetermined condition.

This allows the administrator to recognize at an early stage that the wearer may suffer from heat stroke. Therefore, the aggravation of heat stroke is suppressed.

Further, in the heat stroke prevention system 1, the head wearing device 10 includes an alarm device 12 that issues an alarm to the wearer when the transition of the amount of sweating satisfies a predetermined condition.

This allows the wearer to recognize at an early stage that he / she may suffer from heat stroke. Therefore, the aggravation of heat stroke is suppressed.

Further, the heat stroke prevention system 1 includes a head-mounted device 10 and a management device 91. The head-mounted device 10 includes a communication device 13 that transmits information obtained from the salt concentration sensor 72, the first humidity sensor 52, and the second humidity sensor 54 by wireless communication. The management device 91 receives information from the communication device 13 and stores the amount of salt loss of the wearer.

Further, the heat stroke prevention system 1 is provided with an alarm device 92 that issues an alarm to the administrator when the transition of the amount of salt loss satisfies a predetermined condition.

Further, in the heat stroke prevention system 1, the head wearing device 10 includes an alarm device 12 that issues an alarm to the wearer when the transition of the salt loss amount satisfies a predetermined condition.

The hydration warning system 1 includes a head-mounted device 10 and a management device 91. The head-mounted device 10 includes a communication device 13 that transmits information obtained from the first humidity sensor 52 and the second humidity sensor 54 by wireless communication. The management device 91 receives information from the communication device 13 and stores and displays the amount of sweating of the wearer.

As a result, the management device 91 can detect whether or not the wearer at a remote location needs hydration. The manager can recognize that the wearer needs hydration by the management device 91, and can instruct the wearer to rehydrate or take a break. Therefore, the hydration warning system 1 can prevent heat stroke caused by a decrease in body water due to sweating of the wearer. The hydration warning system 1 contributes to the safe labor management of the wearer who wears the head wearing device 10.

Further, the hydration warning system 1 is provided with an alarm device 92 that issues an alarm to the administrator when the transition of the amount of sweating satisfies a predetermined condition.

This allows the administrator to recognize at an early stage that the wearer needs hydration. Therefore, it is possible to prevent heat stroke caused by a decrease in water content in the body due to sweating of the wearer.

Further, in the hydration warning system 1, the head wearing device 10 includes an alarm device 12 that issues an alarm to the wearer when the transition of the amount of sweating satisfies a predetermined condition.

As a result, the wearer can recognize at an early stage that he / she is in a state of needing hydration due to the decrease in body water due to his / her sweating. This allows the wearer to voluntarily ingest an appropriate amount of water or take a break. Therefore, it is possible to prevent heat stroke due to a decrease in body water due to sweating of the wearer. In the hydration warning system 1, an instruction of water intake by the administrator using the alarm device 92 and an instruction of voluntary water intake to the wearer using the alarm device 12 may be used in combination.

The hydration warning system 1 includes a head-mounted device 10 and a management device 91. The head-mounted device 10 includes a communication device 13 that transmits information obtained from the salt concentration sensor 72, the first humidity sensor 52, and the second humidity sensor 54 by wireless communication. The management device 91 receives information from the communication device 13 and stores and displays the amount of sweating of the wearer.

As a result, the management device 91 can detect whether or not the wearer at a remote location needs salt supplementation. The manager can recognize that the wearer needs salt supply by the management device 91, and can instruct the wearer to supply salt or take a break. Therefore, the hydration warning system 1 can prevent heat stroke caused by a decrease in body salt due to sweating of the wearer. The hydration warning system 1 contributes to the safe labor management of the wearer who wears the head wearing device 10.

Further, the hydration warning system 1 is provided with an alarm device 92 that issues an alarm to the administrator when the transition of the amount of salt loss satisfies a predetermined condition.

This allows the administrator to recognize at an early stage that the wearer needs salt supplementation. Therefore, it is possible to prevent heat stroke caused by a decrease in body salt due to sweating of the wearer.

Further, in the hydration warning system 1, the head-mounted device 10 includes an alarm device 12 that issues an alarm to the wearer when the transition of the salt loss amount satisfies a predetermined condition.

As a result, the wearer can recognize at an early stage that he / she is in need of salt supplementation due to the decrease in body salt due to his / her sweating. This allows the wearer to voluntarily ingest an appropriate amount of salt or take a break. Therefore, it is possible to prevent heat stroke due to a decrease in body salt due to sweating of the wearer. In the hydration warning system 1, an instruction of salt intake by the administrator using the alarm device 92 and an instruction of voluntary salt intake to the wearer using the alarm device 12 may be used in combination.

(Second Embodiment)
FIG. 2 is a schematic diagram of the heat stroke prevention system of the second embodiment. FIG. 3 is a schematic view of the sensor unit of the second embodiment. In the heat stroke prevention system 1A of the second embodiment, the same configurations as those of the heat stroke prevention system 1 described above are designated by the same reference numerals, the description is omitted, and different configurations will be described. As shown in FIG. 2, the heat stroke prevention system 1A includes a head-mounted device 10A and a management unit 9.

The head mounting device 10A includes a head covering member 2, a sensor unit 4A, a fan 6, a battery 16, a first humidity sensor 52, a second humidity sensor 54, an air volume sensor 56, and an environment sensor 58. , A salt concentration sensor 72, a body temperature sensor 74, a heart rate sensor 76, a control device 11, an alarm device 12, a communication device 13, and an antenna 14. That is, the head mounting device 10A is different from the head mounting device 10 of the first embodiment in that the sensor unit 4A is provided instead of the intermediate covering member 3 and the sensor unit 4.

The sensor unit 4A includes a housing 42, a pipe member 44A, a support member 46, and a subunit 7A. Fan 6, first humidity sensor 52, second humidity sensor 54, air volume sensor 56, environment sensor 58, salinity sensor 72, body temperature sensor 74, heart rate sensor 76, control device 11, alarm device 12, communication device 13, antenna 14 And the battery 16 are provided in the sensor unit 4A.

One end 441 of the pipe member 44A is arranged on the outer E of the head covering member 2. The opening of one end 441 of the pipe member 44 is connected to the air outlet 422 of the housing 42. The other end 442A of the tube member 44 is arranged inside the head covering member 2. In the present embodiment, the pipe member 44 includes a plurality of other ends 442A. The opening of the other end 442A of the tube member 44 is connected to the inner lower end of the head covering member 2. The pipe member 44A includes a first pipe 443 and a second pipe 444. The first pipe 443 includes one end 441. At least a part of the first pipe 443 is arranged on the outer E of the head covering member 2. The first pipe 443 communicates with the second pipe 444 at one end opposite to the second pipe 441. It can be said that the first pipe 443 is a pipe member that connects the housing 42 and the second pipe 444.

As shown in FIG. 3, the second pipe 444 is a C-shaped pipe member. As a result, the second tube 444 can be easily deformed according to the size of the wearer's head. The second pipe 444 extends forward from the first pipe 443. The second pipe 444 is provided along the lower end portion of the inner surface 202 of the main body 20. As shown in FIG. 2, the end portion of the second pipe 444 is arranged in front of the center of the main body 20 in the front-rear direction. The first pipe 443 may communicate with any portion of the second pipe 444 in the longitudinal direction, but it is preferable to communicate with the center of the second pipe 444 in the longitudinal direction as in the present embodiment. The second tube 444 includes a plurality of openings on the upper surface. The plurality of openings are the other end 442A. The air sent from the fan 6 inside the housing 42 passes through the first pipe 443 and the second pipe 444, and is discharged upward from the other end 442A.

The subunit 7A is, for example, a plate-shaped member. The subunit 7A is attached to the surface of the second tube 444 facing the wearer's head. That is, the subunit 7A is attached to the inner peripheral surface of the second pipe 444. A salinity sensor 72, a body temperature sensor 74, and a heart rate sensor 76 are attached to one surface of the subunit 7A. The subunit 7A is attached to the inner peripheral surface of the second tube 444 so that the surface on which the salinity sensor 72, the body temperature sensor 74, and the heart rate sensor 76 are attached faces the wearer's head.

(Third Embodiment)
FIG. 4 is a schematic diagram of the heat stroke prevention system of the third embodiment. FIG. 4 is a schematic view of the sensor unit of the third embodiment. In the heat stroke prevention system 1B of the third embodiment, the same configurations as those of the heat stroke prevention system 1 described above are designated by the same reference numerals, the description thereof will be omitted, and different configurations will be described. As shown in FIG. 4, the heat stroke prevention system 1B includes a head wearing device 10B and a management unit 9.

The head mounting device 10B includes a head covering member 2B, a sensor unit 4B, a fan 6, a battery 16, a first humidity sensor 52, a second humidity sensor 54, an air volume sensor 56, and an environment sensor 58. , A control device 11, an alarm device 12, a communication device 13, and an antenna 14. That is, the head wearing device 10A has a head covering member 2, an intermediate covering member 3, a sensor unit 4, a salt concentration sensor 72, a body temperature sensor 74, and a heart rate sensor, as compared with the head wearing device 10 of the first embodiment. The difference is that the head covering member 2B and the sensor unit 4B are provided instead of the 76.

The head covering member 2B is a member that covers the wearer's head. The head covering member 2B is, for example, a straw hat or a red and white hat for exercise. The head covering member 2B has breathability. The sweat generated on the wearer's head becomes water vapor and passes through the head covering member 2B without being blocked by the head covering member 2B. The head covering member 2B includes a main body 20B and a collar 21B. The main body 20B is made of, for example, straw, a straw-like material, or cloth. The collar 21B is integrally formed with the main body 20B, and protrudes from the lower end portion 201B of the main body 20B in a direction away from the wearer. In the following description, the region outside the region surrounded by the head covering member 2B is referred to as the outer E.

The sensor unit 4B includes a housing 42B. The fan 6, the first humidity sensor 52, the second humidity sensor 54, the air volume sensor 56, the environment sensor 58, the control device 11, the alarm device 12, the communication device 13, the antenna 14, and the battery 16 are provided in the sensor unit 4B.

The housing 42B is attached to the outer surface 203 at the crown of the head covering member 2B. The housing 42B has an intake port 421B for sucking air and a plurality of air outlets 422B for sending out air. The housing 42B is attached so that the air outlet 422B faces the outer surface 203 of the head covering member 2B. On the outside of the housing 42B, the first humidity sensor 52, the environment sensor 58, and the antenna 14 are attached in the vicinity of the intake port 421B. On the outside of the housing 42B, a second humidity sensor 54 is attached in the vicinity of the outer surface 203B of the head covering member 2B. A fan 6, an air volume sensor 56, a control device 11, an alarm device 12, a communication device 13, and a battery 16 are mounted inside the housing 42. In the third embodiment, the air volume sensor 56 is attached to the air outlet side of the fan 6. The air volume sensor 56 may be attached to the air inlet side of the fan 6.

It is preferable that the housing 42B is removable from the head covering member 2B. It is preferable that the sensor unit 4B is detachable from the head covering member 2B.

The fan 6 is provided in the sensor unit 4B in the third embodiment. The fan 6 is arranged inside the housing 42. In the third embodiment, the fan 6 guides the air sucked from the intake port 421 of the housing 42 to the head covering member 2B via the air outlet 422. Air passes from the outside E through the surfaces of the housing 42 and the head covering member 2 to enter the inside of the head covering member 2, passes through the surface of the head covering member 2, and is discharged to the outside E. When the wearer sweats, water vapor is supplied to the inside of the head covering member 2. Air containing water vapor due to sweat passes through the surface of the head covering member 2 and is discharged to the outside E.

As described above, the pipe member for connecting the outside E and the inside of the head covering member as illustrated in the pipe member 44 of the first embodiment and the pipe member 44A of the second embodiment is not necessarily provided. Good. By not providing the tube member, it is possible to contribute to the miniaturization of the sensor unit 4B.

Although each embodiment of the present disclosure has been described above, the embodiment is not limited by the content of this embodiment. For example, the second tube 444 of the second embodiment is not provided on the forehead side of the wearer, but may be an O-shaped tube member that surrounds the head circumference over the entire circumference. The salinity sensor 72, the body temperature sensor 74, and the heart rate sensor 76 may be directly attached to the inner peripheral surface of the second tube 444. The support member 46 may be provided integrally with the second pipe 444.

Further, the sensor unit 4B of the third embodiment may be attached to the inside of the head covering member 2B.

1, 1A, 1B Heat stroke prevention system,

hydration warning system

10, 10A, 10B Head mounting device 11 Control device 12 Alarm device 13 Communication device 14 Antenna 16 Battery 2, 2B

Head covering member

20,

20B Main body

201, 201B Lower end 202 Inner surface

203B Outer surface

21, 21B Flange 211 Inner surface 3 Intermediate covering member 31 Through

holes

4, 4A,

4B Sensor unit

42,

42B Housing

421,

421B Intake port

422,

422B Blower port

44, 44A Pipe member 441 One

end

442, 442A The other end 443 1st tube 444 2nd tube 46 Support member 52 1st humidity sensor 54 2nd humidity sensor 56 Air volume sensor 58 Environmental sensor 6

Fan

7, 7A Subunit 72 Salt concentration sensor 74 Body temperature sensor 76 Heart rate sensor 78 Cable 9 Management unit 91 Management device 92 Alarm device E External

Claims

A head covering member that covers the wearer's head and has breathability,
A fan that is placed outside or inside the head covering member and blows or sucks air,
A first humidity sensor for measuring the absolute humidity of the intake air entering the fan or the head covering member, and
A second humidity sensor for measuring the absolute humidity of the exhaust air emitted from the head covering member or the fan, and
Head-mounted device with.
A housing, a fan, a sensor unit having the first humidity sensor and the second humidity sensor,
The head-mounted device according to claim 1, wherein the fan, the first humidity sensor, and the second humidity sensor are supported by the housing.
The head mounting device according to claim 2, wherein the sensor unit is removable from the head covering member.
The head mounting device according to any one of claims 1 to 3, further comprising an intermediate covering member provided in a gap between the wearer's head and the head covering member and having a through hole.
A tube member having one end arranged outside the head covering member and the other end arranged inside the head covering member.
The fan blows air from one of the one end and the other end to the other.
The first humidity sensor measures the absolute humidity of the intake air entering the pipe member from one of the one end and the other end.
The second humidity sensor measures the absolute humidity of the exhaust air emitted from the other end of the one end and the other end.
The head-mounted device according to any one of claims 1 to 4.
The fan sends air from one end toward the other end and is located at the upstream end of the tube member.
The head-mounted device according to claim 5, wherein the first humidity sensor is located upstream of the fan.
The head-mounted device according to claim 6, wherein the first humidity sensor is located outside the head covering member.
The fan sends air from one end toward the other end and is located at the upstream end of the tube member.
The head-mounted device according to any one of claims 5 to 7, wherein the second humidity sensor is located downstream of the fan.
The head-mounted device according to claim 8, wherein the second humidity sensor is located on the inner surface of the head covering member.
The first humidity sensor measures the temperature and relative humidity of the intake air.
The head-mounted device according to any one of claims 1 to 9, wherein the second humidity sensor measures the temperature and relative humidity of the exhaust air.
The head-mounted device according to any one of claims 1 to 10, wherein the fan blows air at an air volume such that the temperature of the exhaust air is equal to or higher than the dew point temperature of the exhaust air.
The head-mounted device according to any one of claims 1 to 11, further comprising a body temperature sensor for measuring the body temperature of the wearer.
The head-mounted device according to claim 12, wherein the body temperature sensor measures core body temperature.
The head-mounted device according to any one of claims 1 to 13, further comprising a heart rate sensor for measuring the heart rate of the wearer.
The head-mounted device according to any one of claims 1 to 14, further comprising an environmental sensor that measures the wet-bulb temperature and the black-bulb temperature around the wearer.
The head-mounted device according to any one of claims 1 to 15, further comprising an air volume measuring device for measuring the air volume of the fan.
The head-mounted device according to claim 16, wherein the air volume measuring device includes an air volume sensor provided at an inlet or an outlet of air of the fan.
The air volume measuring device includes a pressure sensor for measuring the differential pressure of the fan.
The head-mounted device according to claim 16, further comprising a control device that calculates the air volume of the fan based on the information obtained from the pressure sensor.
The air volume measuring device includes a detection mechanism for detecting a power supply voltage for driving the fan.
The head-mounted device according to claim 16, further comprising a control device that calculates the air volume of the fan based on the information obtained from the detection mechanism.
The head-mounted device according to any one of claims 1 to 19, further comprising a control device for calculating the amount of sweating of the wearer based on the information obtained from the first humidity sensor and the second humidity sensor.
A salt concentration sensor for measuring the salt concentration of the wearer's sweat, and
A control device that calculates the amount of salt loss of the wearer based on the information obtained from the salt concentration sensor, the first humidity sensor, and the second humidity sensor.
The head-mounted device according to any one of claims 1 to 20.
The head-mounted device according to claim 20, further comprising an alarm device that issues an alarm when the transition of the amount of sweating satisfies a predetermined condition.
The head-mounted device according to claim 21, further comprising an alarm device that issues an alarm when the transition of the salt loss amount satisfies a predetermined condition.
The head-mounted device according to any one of claims 1 to 21 and a management device are provided.
The head-mounted device includes a communication device that transmits information obtained from the first humidity sensor and the second humidity sensor by wireless communication.
The management device is a heat stroke prevention system that receives information from the communication device and stores the amount of sweating of the wearer.
The heat stroke prevention system according to claim 24, further comprising an alarm device that issues an alarm to the administrator when the transition of the amount of sweating satisfies a predetermined condition.
The heat stroke prevention system according to claim 24, wherein the head wearing device includes an alarm device that issues an alarm to the wearer when the transition of the amount of sweating satisfies a predetermined condition.
The head-mounted device according to claim 21 and a management device are provided.
The head-mounted device includes a communication device that wirelessly transmits information obtained from the salt concentration sensor, the first humidity sensor, and the second humidity sensor.
The management device is a heat stroke prevention system that receives information from the communication device and stores the amount of salt loss of the wearer.
The heat stroke prevention system according to claim 27, further comprising an alarm device that issues an alarm to the administrator when the transition of the salt loss amount satisfies a predetermined condition.
The heat stroke prevention system according to claim 27, wherein the head-mounted device includes an alarm device that issues an alarm to the wearer when the transition of the salt loss amount satisfies a predetermined condition.
The head-mounted device according to any one of claims 1 to 21 and a management device are provided.
The head-mounted device includes a communication device that transmits information obtained from the first humidity sensor and the second humidity sensor by wireless communication.
The management device is a hydration warning system that receives information from the communication device and stores the amount of sweating of the wearer.
The hydration warning system according to claim 30, further comprising an alarm device that issues an alarm to the administrator when the transition of the amount of sweating satisfies a predetermined condition.
The hydration warning system according to claim 30, wherein the head-mounted device includes an alarm device that issues an alarm to the wearer when the transition of the amount of sweating satisfies a predetermined condition.
The head-mounted device according to claim 21 and a management device are provided.
The head-mounted device includes a communication device that wirelessly transmits information obtained from the salt concentration sensor, the first humidity sensor, and the second humidity sensor.
The management device is a hydration warning system that receives information from the communication device and stores the amount of salt loss of the wearer.
The hydration warning system according to claim 33, further comprising an alarm device that issues an alarm to the administrator when the transition of the salt loss amount satisfies a predetermined condition.
The hydration warning system according to claim 33, wherein the head-mounted device includes an alarm device that issues an alarm to the wearer when the transition of the salt loss amount satisfies a predetermined condition.