JP6750311B2 - System power supply for wearable devices - Google Patents

Description

The present invention relates to a system power supply device in a wearable device such as a smart helmet equipped with an electronic control device and a battery.

It is publicly known that electrodes are attached to a hat or a helmet to obtain biological information (see Patent Documents 1 to 3). As the biometric information, brain waves, heart rate, pulse waves, body temperature, etc. are representative. In order to obtain this biometric information, a system for measuring bioimpedance, detecting a worker's fatigue level, drowsiness, etc., and issuing a warning to encourage a break is described.

Wearable devices such as the aforementioned helmets are equipped with electric devices and electronic devices, and power is supplied to them from a battery. Patent Document 4 discloses a structure in which a conductive wire is provided that conducts when connected to a buckle of a chin strap of a helmet and turns on and off a switch circuit. In Patent Document 5, an electric device such as a wiper and a lamp, a battery for driving the electric device, a power switch for connecting and disconnecting the battery and the electric device are provided in a helmet, and a buckle provided on a chin strap of the helmet is turned on when the helmet is attached. There is disclosed a structure provided with a switch mechanism which is brought into a state and is turned off upon removal. Patent Document 6 discloses that a helmet wear is determined by the conduction of both strap pieces when a jaw strap stopper is connected.

In addition, Patent Document 7 discloses a configuration in which the system power is turned on and off by a plurality of switches. Specifically, it is determined that the helmet cap body is worn by the user only when all the continuity of the chin strap connection switch, chin strap pull switch and head switch is detected, and the system power is turned on. Is disclosed. In this case, even if the helmet is hooked on the hook with the buckle of the chin strap connected and stored, the head switch does not operate, so there is an advantage that the power does not turn on.

However, since the head switch of Patent Document 7 is a switch that is operated by being pressed by the top of the user's head, the head switch constantly presses on the head, which makes the wearing feeling of the helmet uncomfortable, and when it takes a long time. It's painful. Further, it is assumed that the head switch is turned off when the helmet is displaced from the head after wearing the helmet, which causes malfunction.

JP, 2010-148718, A JP 2005-230030 A Utility model registration No. 3202884 Japanese Utility Model Publication No. 4-37860 Japanese Utility Model Publication No. 62-41031 JP 2002-264874 A JP, 2007-016342, A

Therefore, in view of the above-mentioned situation, the present invention is to solve the problem in a system power supply device in a wearable device such as a smart helmet equipped with an electronic control device to be mounted on the head of a user for use. The system power supply is turned on only when the device is worn on the head, and is turned off in other cases. The system power supply is suitable for wearable devices without malfunction and stable pressure on the head. It is in the point of providing.

In order to solve the above problems, the present invention provides a radio wave shield device in a wearable device having the following configuration.

(1)
A system power supply device in a wearable device equipped with an electronic control device, which is mounted on a user's head and used,
The wearable device includes an electronic control unit, a battery, and a combination switch for turning on and off the power supply from the battery,
The combination switch includes a first switch and a second switch,
The first switch is integrally incorporated into a buckle of a chin strap used for mounting the wearable device on a user's head, and automatically when the first member and the second member forming the buckle are connected. Is turned on when the buckle is removed and the wearable device is removed from the head, it is automatically turned off.
The second switch, when the wearable device is worn on the head, contacts or approaches at least part of the head and detects a change in impedance due to the presence of the head, and a wearable device based on the contact sensor. An automatic power-off circuit that determines whether the device is attached or detached. When the first switch is turned on, power is temporarily supplied from the battery to the contact sensor and an electronic control device that controls the contact sensor. Only when the function of the system power supply unit including the switch is activated and the first switch is in the ON state, it is turned on when it is detected that the wearable device is worn by the user, and when it is detected that the wearable device is not worn, it is turned off. , And once it is turned on and connected, it is set to maintain the connected state regardless of the subsequent change in impedance,
A system power supply device in a wearable device, characterized in that the system power supply is turned on only when both the first switch and the second switch are on, and power is continuously supplied from the battery to the electronic control device.

( 2 )
The wearable device is a helmet, the first switch is a mechanical switch built into a buckle that connects a chin strap that is always used when wearing a helmet , and the contact sensor that constitutes the second switch is inside the cap body. The system power supply device in the wearable device according to claim 1, wherein the system power supply device is provided at a position corresponding to a forehead.

According to the system power supply device in the wearable device of the present invention as described above, the combination switch including the first switch and the second switch is provided, and the second switch is turned on by detecting the presence of the head. Therefore, it is possible to prevent an erroneous operation in which the system power is turned on when it is not worn on the head, for example, when it is hung in a locker and stored.

The wearable device further includes a contact sensor that constitutes a second switch, and when the first switch is turned on, power is temporarily supplied from the battery to the contact sensor and an electronic control device that controls the contact sensor. Then, by activating the function of the system power supply device including the second switch, the contact sensor contacts the proper position of the head and detects the presence of the head without wearing the wearable device tightly on the head. When the wearable device is detached from the head, the contact sensor can reliably detect the absence of the head, so that no malfunction occurs. Further, since the contact sensor only comes into contact with the proper position on the head, there is no feeling of pressure on the head, and there is no pain even if a worker in a factory wears it for a long time.

When the wearable device is worn on the head, the contact sensor forming the second switch contacts the head or approaches the head and detects a change in impedance due to the presence of the head. On the other hand, even if the wearable device is slightly displaced, if the contact sensor is in contact with or close to the head, for example, the forehead, a sufficient impedance change can be detected. Further, if the impedance change by the contact sensor is used, it is superior to the temperature sensor in that it does not depend on the response speed or the environment, and it can be realized at low cost without requiring a complicated configuration such as an infrared ray or illuminance sensor. In addition, unlike a pressure sensor, the head is not pressed, and for example, a worker in a factory does not have any pain even if it is worn for a long time.

The second switch is composed of an auto power-off circuit that determines the attachment/detachment of the helmet based on the contact sensor. Once the second switch is turned on and connected, the connected state is maintained regardless of the change in impedance thereafter. With this setting, even if the wearable device is slightly displaced from the head, the wearable device continues to operate if the first switch is in the ON state.

If the first switch is a mechanical switch that is turned on when the wearable device is worn on the head and turned off when the wearable device is removed from the head, the first switch is released from the troublesome operation of the switch. In particular, the wearable device is a helmet, the first switch is built in a buckle that connects a chin strap that is always used when wearing a helmet, and the contact sensor that constitutes the second switch is located inside the cap body at a position corresponding to the forehead. When the helmet is mounted on the head, the system power is automatically turned on when the helmet is mounted on the head. In addition, the helmet is equipped with various sensors in addition to the contact sensor, and biometric data and body movement data are acquired from various sensors to detect abnormalities in the worker and build a system to manage the physical condition of the worker and improve work efficiency. it can.

It is a fragmentary sectional view showing an example of use of a smart helmet which is a typical embodiment of the present invention. It is a side view of a smart helmet similarly. It is a perspective view showing a pocket member and a radio wave shield material. It is a partial top view which shows the buckle with the 1st switch provided in the chin strap. 6 is a flowchart for explaining an ON/OFF operation of a system power supply including a first switch and a second switch. It is a block diagram which shows the hardware constitutions of a smart helmet. It is the flowchart which showed the operation|movement of a smart helmet. It is a block diagram which shows the detail of temperature measurement. FIG. 3 is a block diagram showing details of acceleration/angular velocity measurement. 7 is a graph showing an example of measurement of acceleration/angular velocity in a walking motion. 7 is a graph showing an example of measurement of acceleration/angular velocity in bowing motion. It is a graph which shows the example of measurement of the acceleration and the angular velocity in the motion of moving forward.

The smart helmet of the present invention acquires biometric data and environmental data such as outside temperature from various sensors provided on the helmet while the worker (user) wears the head M and uses the same. The motion of is acquired as body motion data. Then, these various kinds of acquired data are processed by the signal processing means provided in the helmet, and sequentially transmitted to the management server installed outside by the wireless communication means. The management server stores the personal information associated with the individual ID, processes the sent information, and monitors the physical condition such as the fatigue level of the worker. By using such a management system using a smite helmet, it is possible to manage the physical condition of the worker, prevent accidents in advance, and improve work efficiency. Further, when the management server recognizes an abnormality of the worker, it is also possible to send a warning signal to the smart helmet of the worker to notify the worker.

Also, environmental information other than biometric information, sensors that measure body movement information can be measured at the same time, and the signal processing device can be used to calculate and deliver the worker information to the management server using the wireless communication device so that the situation can be known on the screen. .. The management server may be a personal computer or a tablet terminal. By accumulating the above information and associating it with big data, it is possible to provide a system that predicts signs of poor health and protects people from dangerous situations.

Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. FIG. 1 shows a state in which the head of a worker M is covered with the smart helmet 1 of the present invention, and FIG. 2 shows a side view of the smart helmet 1, in which reference numeral 2 denotes a cap body, 3 denotes a headband, 4 Indicates a chin strap.

1 and 2, a portion of the headband 3 that comes into contact with the forehead of an operator is provided with a biometric information acquisition electrode 5 made of a conductive cloth having flexibility. The biometric information acquisition electrode 5 also has a function as a contact sensor. A temperature/humidity sensor 6 and an acceleration/angular velocity sensor 7 are provided inside the cap body 2 by utilizing the space at the top of the head, and the outside of the cap body 2, that shown in the figure is located on the back of the head. A temperature/humidity sensor 8 is provided. Further, an electronic control unit 9 provided with a signal processing means for processing signals from various sensors and a wireless communication means for transmitting/receiving data to/from an external management server is provided at an appropriate position of the cap body 2. Further, a battery 10 for supplying electric power to various sensors 6, 7, 8 and signal processing means 9A and wireless communication means 9B is provided. For example, the electronic control unit 9 is provided inside the cap body 2 by utilizing the space of the occipital region, and the battery 10 is provided at the collar portion outside the cap body 2, but the installation location is Not limited. Further, although not shown, an image sensor for acquiring a face image of the worker is also provided on the collar portion of the cap body or the like. Further, a position information sensor (GPS) is provided to acquire position information of the work site. Here, the acceleration/angular velocity sensor 7 and the GPS are often mounted on smartphones and information terminals equipped with various wireless communication functions recently, and they are provided as general-purpose parts due to the progress of downsizing and power saving.

Since the electronic control unit 9 generates high-frequency radio waves, it is necessary to protect the head from radio waves emitted from the wireless communication means. Therefore, the radio wave shield material 11 is arranged at least on the head side around the electronic control unit 9. On the other hand, it is necessary not to block the communication radio waves emitted from the wireless communication means of the electronic control unit 9 to the outside. The radio waves radiated from the radio communication equipment provided in the management server directly or through the internet communication network or the telephone network to reach the worker by being radiated from the radio base station, the radio router, etc. are radio waves to the head. Do not shield.

The electronic control unit 9 is provided with a pocket for storing the electronic control unit 9 in at least a part of the inside of the cap body 2. Specifically, as shown in FIGS. 1 and 7, a pocket member 12 is provided on the back of the head inside the cap body 2 and is stored in a pocket formed by the pocket member 12 and the inner surface of the cap body 2. Then, the radio wave shield material 11 is arranged between the head M and the electronic control unit 9. Specifically, the radio wave shield material 11 is laminated and arranged on the pocket member 12. The pocket member 12 has a base surface 12A corresponding to the head side and both side surfaces 12B and a lower surface 12C among the peripheral surfaces thereof, and is attached to the occipital region of the inside of the cap body 2 by using a peripheral attachment piece 12D. A bag-shaped holding portion 12E opened upward is formed on the inner surface of the cap body 2, and the electronic control unit 9 is stored in a pocket formed by the holding portion 12E and the inner surface of the hat body 2. As a result, the radio wave emitted from the electronic control unit 9 is blocked by the radio wave shield material 11 from propagating toward the head. Here, the shielding of radio waves means limiting the propagation in a specific direction by absorbing or reflecting the radio waves or both absorbing and reflecting the radio waves. The shield material 11 is configured. The electronic control unit 9 can be fixed to the radio wave shield material 11, the cap body 2, etc. with an adhesive, a surface fastener or the like.

Specifically, the radio wave shield material 11 is a thin film made of a conductive material, and may have any shape such as a plate shape, a wire mesh shape, and a fiber woven shape, and the periphery thereof is laminated with a soft material. Among them, the conductive fiber woven fabric is most preferable in terms of the feel to the skin, the damage to the head, and the breakage of the laminated soft material. In the present embodiment, AGposs (registered trademark) manufactured by Mitsufuji Corporation is used as the radio wave shield material 11. The radio wave shield material 11 is a woven fabric made of silver-plated fiber, but may be plated with a conductive substance such as nickel, copper nickel, or aluminum in addition to silver. Silver is most preferable because it has little effect on the human body.

The pocket member 12 may be made of any material such as fiber, wood, paper, leather, polystyrene foam, polypropylene polypropylene, elastomer material made of rubber, polyurethane, etc. as long as it is flexible, but shock absorbing and scratch resistant. Polyurethane is the best.

In the case of the smart helmet 1, the location of the pocket member 12 may be anywhere inside, outside, inside, or a chin strap of the head wearing article, but the inside of the cap body 2 is preferably around the occipital region. The present invention is not limited to the smart helmet 1, but examples of the head-mounted wearable device other than the smart helmet 1 include a hat, a wig, a mask, a costume, headgear, a mask, glasses, goggles, a hair band, a headband, and the like. These are equipped with a wireless communication function. Further, as contents stored in the pocket member 12, a transmitter, a transceiver, a telephone, a music/video player, a terminal such as a smartphone, a USB connection terminal, an electronic device such as a battery, and other miscellaneous items such as amulets and coins. In a helmet for cycling, food and drink can be stored together with wireless communication means.

The smart helmet 1 includes various sensors mounted on a helmet worn by a worker, from the biometric data of the site worker at the work site, the work environment data, the image data of the worker, body movements related to the movement of the helmet and the worker. Measure the data and manage the physical condition of the worker. Typically, the smart helmet 1 detects an abnormal condition of a worker by comparing data during field work with an abnormal threshold value calculated from data measured and accumulated in the past. This makes it possible to judge the health condition of the worker and notify the manager or the like to easily grasp the health or safety condition of the worker. In addition, by accumulating analysis data, it is possible to predict the precursor of health deterioration. Further, it is also possible for an operator or an administrator to manually release the erroneous determination of the sensor, the erroneous operation of the switch, and the erroneous determination of the abnormality determination, and by accumulating the data of the erroneous determination and the erroneous operation, It is also possible to employ a program that automatically calibrates the system based on the accumulated data so that the erroneous determination and the erroneous operation do not occur. In particular, the system is effective in that erroneous determination and erroneous operation may occur due to the method adopted as the method of fixing the electronic control unit 9 described above.

Here, the work environment data is temperature, humidity and position information at a work site, and the biological data is brain waves, heartbeats, pulse rates, body temperature, body temperature, deep body temperature, blood flow, electrocardiogram, myoelectricity, sweating. The image data is the face image of the worker, and the body motion data regarding the movement of the helmet or the worker is acceleration and angular velocity (gyro).

As the biometric data, changes in bioelectric impedance due to electroencephalogram, heartbeat, pulse rate, body temperature, body temperature, deep body temperature, blood flow, electrocardiogram, myoelectricity, sweating, etc. are measured by the biometric information acquisition electrode 5 (contact sensor). Get by. The body temperature may be acquired by separately providing a temperature sensor. Further, the work environment data acquired by the various sensors attached to the cap body 2 are temperature (temperature), humidity, position information, or rainfall condition, and the body movement data is information on the movement of the helmet or the body. At the same time, the electronic control unit 9 is mounted for stable measurement and analysis, and information can be distributed to the management server using a wireless communication means so that the situation can be known on the screen. As the biological information acquisition electrode 5, it is preferable to use AGposs (registered trademark) manufactured by Mitsufuji Co., Ltd. in consideration of washing durability in addition to flexibility and flexibility.

When the smart helmet 1 is used, a combination switch provided at a proper position on the helmet is turned on. This combination switch is composed of a first switch and a second switch. The first switch is a mechanical switch that is automatically turned on when the smart helmet 1 is worn on the user's head, and is automatically turned off when the smart helmet 1 is removed from the head. The second switch maintains the ON state only when the first switch is in the ON state and only when the user wears the helmet based on the change in the head impedance of the contact sensor, and detects the non-wearing of the helmet. Sometimes it is in the OFF state. Then, the system power supply is turned on only when both the first switch and the second switch are on, and the power is continuously supplied from the battery 10 to the various sensors 6, 7, 8 and the electronic control unit 9. When the smart helmet 1 is not used, it is necessary to completely shut off the battery 10 in order to save the stored power. The battery 10 can be, for example, a lithium battery or an alkaline battery. Although not shown, when the battery 10 is built in a transmitter or a sensor, the wiring inside the smart helmet 1 can be simplified, and since it is not necessary to provide packing or the like at the connecting portion, the waterproof property is also improved. Furthermore, when the battery 10 is a small button-type battery or coin-type battery, the weight of the entire smart helmet 1 is reduced, so that the burden on the operator is reduced. Furthermore, the smart helmet 1 can also be charged by installing it on a dedicated charging stand. Especially, in the case of a charging stand installed on the wall, it can be stored and charged at the same time by hooking the smart helmet 1 on the wall. It is very convenient in terms. Further, the smart helmet 1 can be provided with a battery remaining amount means, for example, a means for notifying the administrator etc. of the battery remaining amount by wireless communication means can be adopted, and the battery remaining amount can be indicated by lighting an LED or the like It is also possible to employ means for indicating.

The specific configuration of the system power supply will be described below. In this embodiment, the first switch is integrally incorporated in the buckle 13 of the chin strap 4. The buckle 13 has a structure in which the first member 13A and the second member 13B provided on the ends of the jaw strings 4 and 4 on both sides are engageable with and disengageable from each other, and either the first member 13A or the second member 13B. A small switch such as a limit switch is built in one of them, and when they are connected, they sense the presence of the other and connect. That is, when the helmet is worn and the buckle 13 of the chin strap 4 is connected, the first switch is activated to be in the ON state. When the first switch is turned on, power is temporarily supplied from the battery 10 to at least the contact sensor and the electronic control device 9 that controls the contact sensor, and the functions of the system power supply device including the second switch are activated. ..

However, when the power is turned on and off only by this first switch, the buckle 13 may be hung while being stored when the helmet is stored, and in that situation, the power remains on during storage. Therefore, it is necessary to turn on the system power only when the worker is actually wearing the helmet. For that purpose, it is essential for the second switch to recognize from the biometric data that the worker wears the helmet. The second switch is composed of an automatic power-off circuit that determines attachment/detachment of a helmet. Specifically, after the first switch is turned ON, when the presence of the head is recognized (helmet wearing), the hold circuit maintains the ON state, and when the presence of the head cannot be recognized (helmet not wearing). ) Is set so that the hold circuit is turned off. Here, biometric data is used to recognize the presence of the head.

In the present embodiment, the contact sensor used for the second switch uses an impedance change that occurs when the biometric information acquisition electrode 5 (contact sensor) contacts or approaches the skin. The ON/OFF operation of the system power supply will be described with reference to FIG. First, the case of wearing a helmet will be described. When the worker wears the helmet on the head and connects the buckle 13 of the chin strap 4, the first switch is turned on. When the first switch is turned on, a current flows through the biometric information acquisition electrode 5, and a change in impedance due to contact with or proximity to the skin is detected. By detecting a change in impedance, it is determined that a helmet is worn, the hold circuit is maintained in the ON state, the second switch is turned on, and the system power supply is turned on. This judgment is executed by the electronic control unit 9. Once the second switch is turned on and connected, the second switch maintains the connected state regardless of the subsequent change in impedance. If no change in impedance is detected, it is determined that the helmet is not worn, the hold circuit is turned off, and the system power is turned off.

When the buckle 13 of the chin strap 4 is removed when the helmet is taken off, the system power is automatically turned off when the first switch is turned off. Then take off the helmet from the worker's head. Then, when the helmet is stored, it is hooked on the locker hook with the buckle 13 of the chin strap 4 connected (first switch ON state), but since the impedance does not change, it is determined that the helmet is not worn, and the second The switch is not turned on and the system power is turned off.

In this way, the system power supply is turned on and off by combining the first switch that is always operated when wearing the helmet and the second switch that is configured with an auto power-off circuit that determines whether the helmet is attached or removed. It is possible to prevent malfunctions such as supplying power from the battery when not worn. Also, since the contact sensor is provided in a part of the periphery of the head, it is not necessary to tighten the helmet tightly, and even if the helmet shifts during work, the smart helmet will continue to operate if it contacts or approaches the forehead. .. Moreover, if the impedance change by the contact sensor is used to judge whether the helmet is worn or not, it is superior to the temperature sensor in that it does not depend on the response speed and the environment, and requires a complicated configuration such as an infrared ray or illuminance sensor. It can be realized at low cost. Also, once the second switch is connected, if the connection state is maintained regardless of the change in impedance, even if the contact sensor comes off the forehead due to the displacement of the helmet, as long as the first switch is connected, The smart helmet continues to operate. Then, if the system power supply is automatically turned off when the first switch is turned off, the power is automatically turned off, so that power consumption of the battery can be suppressed and it is not necessary to provide an individual manual switch. The troublesome operation of turning off the power becomes unnecessary. Further, by providing the contact sensor at a position corresponding to the forehead of the headband 3, it is possible to make contact more stably and surely than other parts.

The position where the first switch is provided can also be applied to the rubber band of the mask and the frame of the glasses, and other forms of ON/OFF operation of the switch include a button type, a manual tie of the string, etc. It is applicable to all types of connection. It is also possible to energize the jaw strap and the buckle by making them with a conductive material and connecting them. In that case, the chin strap itself may be made of conductive fibers, or the chin strap may be provided with conductive wires. It is also possible to employ various sensors or a manual switch for the first switch, and for example, a contact sensor may be arranged on the frame portion of the glasses.

As the second switch (contact sensor), AGposs (registered trademark) manufactured by Mitsufuji Corporation was adopted as described above, but the material may be any conductive fiber such as silver, nickel, copper nickel, etc. , Silver is the best because it has less effect on the human body. The form may be plate-like, wire-like, fiber-like or the like, but the fiber-like is the best in terms of the feel to the skin. The outer shape may be rectangular, circular, triangular, or any other shape as long as it has a certain area. The size is not particularly limited, but it is determined by balancing the contact rate with the skin and the cost. In the present embodiment, a contact sensor whose impedance changes due to contact is used to acquire the biometric data, but other than that, a temperature sensor, an illuminance sensor, or an infrared sensor that detects the presence of the head by infrared rays may be used. The position of the contact sensor may be anywhere on the forehead, ears, nape, cheeks, neck, etc. around the head, but it is most preferable around the forehead inside the helmet in terms of stable contact with the skin. .. Furthermore, when a contact sensor is provided on the chin strap, contact with the cheeks, neck, and ears can be detected. Further, it is possible to provide a contact sensor on the nose pad of the glasses.

Next, the hardware configuration of the smart helmet 1 will be briefly described with reference to the block diagram of FIG. In addition, various sensors are connected to the detachable switch 20 serving as the first switch, and power is supplied from the battery 10. Examples of the sensor include a temperature/humidity sensor 21, a biological information sensor 22, an acceleration sensor 23, an angular velocity sensor 24, an image sensor 25, and the like. Information of the temperature/humidity sensor 21 and the biometric information sensor 22 is sent to the biometric information detection unit 26 to acquire biometric data. Information on the acceleration sensor 23 and the angular velocity sensor 24 is sent to the impact information detection unit 27 to acquire body movement data. Further, the information of the image sensor 25 is sent to the image information detection unit 28, and the image data is acquired.

The biometric data detected by the biometric information detection unit 26 is processed by the biometric information processing unit 29, and when a biometric abnormality is detected by the biometric abnormality detection unit 30, the cooling system 31 such as a Peltier element is operated to operate the head. The biological abnormality processing unit 32 sends information to the notification determination unit 33, and the notification determination unit 33 sends the abnormality information to the abnormality notification unit 34 as needed, and the wireless communication means 35 causes an external management server or the like. The location information acquired by the location information sensor 37 is transmitted to the notification destination 36 of FIG. Then, if necessary, the notification destination 36 confirms via the wireless communication means 35 to confirm the situation of the user of the smart helmet. This is the answerback function 38.

On the other hand, the body movement data detected by the impact information detecting unit 27 is processed by the impact information processing unit 39, and when the body movement abnormality is detected by the impact abnormality detecting unit 40, the impact abnormality processing unit 41 causes the notification determining unit to notify. 33, the notification determining unit 33 sends the abnormality information to the abnormality notifying unit 34 as necessary, and the wireless communication unit 35 notifies the notification destination 36, such as an external management server, of the position acquired by the position information sensor 37. Send with information. The image data detected by the image information detecting unit 28 is processed by the image information processing unit 42, the notification determining unit 33 sends face image information to the abnormality notifying unit 34, and the wireless communication unit 35 causes the external management server to operate. Etc. to the report destination 36. The face image information is used to confirm the operator's state by the sun server back function 38.

Next, the basic operation of the smart helmet will be briefly described. In the present embodiment, the biometric data, the work environment data, and the face image data of the worker are intermittently measured at a predetermined time or time interval, and are not constantly measured, so that battery consumption is suppressed. , The battery can be miniaturized.

Further, in the present embodiment, after the worker puts on the helmet, the initial data at the start of the work of the worker for a certain period of time is measured, and the abnormal threshold value is calculated by collating with the data of the past threshold value. In consideration of the fact that the abnormal value changes accordingly, the abnormal threshold can be set accurately.

Further, in the present embodiment, when the value detected by the temperature sensor exceeds the abnormal threshold value, if the cooling system for cooling a part of the head is activated, the head is cooled and the worker becomes heat stroke. Can be prevented. Here, the cooling system can be easily configured by using a Peltier element.

Further, in the present embodiment, when a value exceeding the abnormal threshold value is detected, it is possible to promptly respond by notifying the worker or the management system that manages the worker.

Further, in the present embodiment, if the personal data is managed by the individual ID, it is not necessary to make the personal setting each time, and the threshold value management becomes easy.

In this embodiment, if the measurement data is transmitted wirelessly to the management personal computer server, mobile personal computer, and smartphone, data management becomes easy and a large-scale system can be constructed.

Next, the operation of the smart helmet will be outlined with reference to the flowchart shown in FIG. First, as described above, the system power is turned on to start. Then, temperature and humidity information and biometric information are acquired by various sensors and compared with the latest or previous data. If the temperature or humidity is abnormal compared with the abnormal threshold, a temperature/humidity abnormal flag is issued, and if the biological information is abnormal compared with the abnormal threshold, the biological abnormal flag is issued. If they are normal, move to the next step.

Then, it is judged whether there is an abnormality in the temperature/humidity or biological information, and if there is an abnormality, the abnormality generation processing routine operates, the face image data is acquired, the biological reaction confirmation state is detected, and the biological reaction is confirmed. In this case, the temperature, the humidity, and the biological information are acquired again, and if the biological reaction cannot be confirmed, a notification process is performed and the process ends. If there is no abnormality in the temperature/humidity or the biometric information, the temperature/biological information data is determined and the temperature/humidity or the biometric information is acquired again.

The above measurement operation is repeatedly performed while wearing the helmet. When the chin strap 4 is removed and the helmet is taken off, the first switch is turned off and the system power is turned off.

FIG. 8 is a block diagram showing details of temperature measurement. This measurement is in the power saving mode. First, for the current temperature data acquired by the temperature sensor, normal heat is calculated from the accumulation of past measurement data, and the threshold value is determined. Then, the initial value is determined by continuously measuring for 5 minutes after wearing the helmet. If the initial value of the temperature is within the threshold, the measurement timing is set to 30 minutes/time to suppress the battery consumption. If the initial value of the temperature is outside the threshold value, continuous measurement is performed for 30 minutes thereafter, and if it is within the threshold value, the measurement timing is set to 30 minutes/time to suppress battery consumption. If the temperature measured once every 30 minutes is outside the threshold value, continuous measurement is performed again for 30 minutes, and if it is still outside the threshold value, the management server or the operator is notified. It should be noted that during a certain period of the initial use of the smart helmet (for example, one month after the start of use), in which past data has not been accumulated, the measurement timing is set to 5 minutes/times to save some power, while accumulating data. It is also possible to give priority.

Next, details of the acceleration/angular velocity measurement by the acceleration/angular velocity sensor for acquiring the body movement data of the helmet or the worker will be described with reference to the block diagram shown in FIG. The measurement with the acceleration/angular velocity sensor is to detect an abnormal operation such as a fall of an operator, and therefore the measurement is always performed at a basic level. First, measurement is performed 10 times within a sampling time of 10 msec, and the average value is transmitted every 100 msec. Then, the measurement is started at regular intervals, and sampling is performed every 10 msec. If the value (absolute value) at this time is outside the threshold value, the fall determination is performed, and a plurality of fall patterns are set in advance, and the fall pattern is compared with that to determine the fall. .. If the fall is determined, the management server or the worker is notified. Further, in the fall determination, if the result is not the determination, that is, the fall is not considered, the measurement is always returned to.

The above-mentioned measurement time and measurement interval are not limited to the above-mentioned values, and should be appropriately set according to the work environment, work content, and the like.

A radio wave shielding experiment using the radio wave shielding material 11 was conducted. The test body is a silver-plated fiber woven fabric, a silver-plated fiber nonwoven fabric, a silver-plated fiber knit knit, a nickel-copper fiber woven fabric, and a copper mesh. First, the measurement frequency range of 100 kHz to 1 GHz was measured by the electromagnetic shield evaluation method developed by KEC (Kansai Electronics Industry Promotion Center). In this evaluation method, a 150 mm×150 mm flat plate-shaped test body was sandwiched between jigs for measuring a near electric field shield effect and a near magnetic field shield effect, and then measured. In the range of the measurement frequency of 1 GHz to 15 GHz, a DFFC (Dual-Focus Flat Cavity) fixture having an elliptical internal shape is sandwiched with a 300 mm×30 mm flat plate-shaped test body. This evaluation method is performed by connecting a network analyzer to the transmitting and receiving points at the two focal points of the ellipse.

As a result of this measurement, in the electric field shielding property in the range of the measurement frequency of 100 kHz to 1 GHz, the one-piece test piece of the silver-plated fiber woven fabric, the one-piece test piece of the nickel-copper fiber woven cloth, and the one-piece test piece of the copper mesh show 40 dB. Although it has a shielding performance exceeding the above range, the double-layered test piece of the silver-plated fiber non-woven fabric tends to decrease to 40 dB or less when it exceeds about 80 MHz. Naturally, the shield performance is improved by stacking the number of sheets. Regarding the magnetic field shield characteristics, the shielding performance of each test specimen also improved as the frequency increased, and one copper mesh test specimen had high overall shield performance, but three layers of silver-plated fiber woven fabric were stacked. The test body has a shielding performance of about 30 dB at 1 GHz. Incidentally, it was found that the three-layer test piece of the nickel-copper fiber woven fabric had a shielding performance of more than 40 dB in the range of about 50 MHz, but the two-layer test piece of the silver-plated fiber non-woven fabric had no shield performance at all.

Next, when the measurement frequency is in the range of 1 GHz to 15 GHz, especially in the vicinity of 2.4 GHz used in wireless communication lines, the shield performance exceeds 40 dB in order from the lower one, a copper mesh test piece, and silver plating. They are a two-ply test piece of a fiber woven fabric, a one-ply test piece of a nickel-copper fiber woven cloth, and a two-ply test piece of a nickel-copper fiber woven cloth. On the other hand, the one-piece test piece of the silver-plated fiber woven fabric has a shielding performance slightly lower than 40 dB, and further, the three-ply test piece of the silver-plated fiber non-woven fabric, the two-ply test piece of the silver-plated fiber non-woven fabric, and the one of the silver-plated fiber non-woven fabric. It becomes lower in the order of the one-piece test body, and the silver-plated fiber knitted one-piece test body is 20 dB or less.

From the above radio wave shield test, it is understood that it is possible to shield the radio wave of the frequency used in the normal wireless communication means with the shielding performance of 40 dB or more by using two or more silver-plated fiber woven fabrics. .. Here, the shield performance of 40 dB or more means that the radio wave shield is 99% or more, and thus the shield performance of 40 dB is the required standard of the radio wave shield. Since the test bodies used in this measurement test have different fiber densities and areal weights, it is difficult to compare the performances, but in the 2.4GHz band such as Wi-Fi (registered trademark) or Bluetooth (registered trademark). It can be seen that the nickel-copper fiber woven fabric and the silver plated fiber woven fabric can shield radio waves.

Finally, test results are shown when the worker wears the smart helmet 1 and performs some typical actions. FIG. 10 shows measurement data of acceleration/angular velocity on three axes (x, y, z) in a normal walking motion. Of the three axes, the x-axis indicates the operator's front-back direction, the y-axis indicates the height up-down direction, and the z-axis indicates the operator's lateral direction. FIG. 11 shows triaxial measurement data of acceleration and angular velocity in bowing motion. FIG. 12 shows three-axis measurement data of acceleration and angular velocity in a forward motion. The pattern of the acceleration/angular velocity data is obviously different between the case of a fall and the normal operation, and it is possible to distinguish them by the fall determination.

1 Smart helmet (wearable equipment)
2 Hat body 3 Headband 4 Chin string 5 Biometric information acquisition electrode (contact sensor)
7 Acceleration/angular velocity sensor 8 Temperature/humidity sensor 9 Electronic control unit 9A Signal processing means 9B Wireless communication means 10 Battery 11 Radio wave shield material 12 Pocket member (pocket)
13 Buckle (first switch)
20 Detachable switch (first switch)
21 Humidity sensor 22 Biological information sensor (second switch)
23 Acceleration sensor 24 Angular velocity sensor 25 Image sensor 26 Biometric information detection unit 27 Impact information detection unit 28 Image information detection unit 29 Biometric information processing unit 30 Biometric abnormality detection unit 31 Cooling system 32 Biometric abnormality processing unit 33 Notification determination unit 34 Abnormality notification unit 35 wireless communication means 36 report destination 37 position information sensor 38 answerback function 39 impact information processing unit 40 impact abnormality detection unit 41 impact abnormality processing unit 42 image information processing unit M head

Claims (2)

A system power supply device in a wearable device equipped with an electronic control device, which is mounted on a user's head and used,
The wearable device includes an electronic control unit, a battery, and a combination switch for turning on and off the power supply from the battery,
The combination switch includes a first switch and a second switch,
The first switch is integrally incorporated into a buckle of a chin strap used for mounting the wearable device on the user's head , and is automatically connected when the first member and the second member forming the buckle are connected. Is turned on when the buckle is removed and the wearable device is removed from the head, it is automatically turned off.
The second switch, when the wearable device is worn on the head, contacts or approaches at least part of the head and detects a change in impedance due to the presence of the head, and a wearable device based on the contact sensor. An automatic power-off circuit that determines whether the device is attached or detached, and when the first switch is turned on, power is temporarily supplied from the battery to the contact sensor and an electronic control device that controls the contact sensor. Only when the function of the system power supply unit including the switch is activated and the first switch is in the ON state , the system is turned on when it is detected that the user wears the wearable device, and is turned off when it is detected that the wearable device is not worn. , And once it is turned on and connected, it is set to maintain the connected state regardless of the subsequent change in impedance,
A system power supply device in a wearable device, characterized in that the system power supply is turned on only when both the first switch and the second switch are on, and power is continuously supplied from the battery to the electronic control device. The wearable device is a helmet, the first switch is a mechanical switch built into a buckle that connects a chin strap that is always used when wearing a helmet , and the contact sensor that constitutes the second switch is inside the cap body. The system power supply device in the wearable device according to claim 1, wherein the system power supply device is provided at a position corresponding to a forehead.

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