JP2017214673A - Radio shielding device in wearable apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio shielding device, effectively protecting a head part from radio waves by a radio shielding material, mounting the radio shielding material without much labor, and preventing a wearer from feeling discomfort, in a wearable apparatus with a radio communication function being used with it worn on a head part of a user.SOLUTION: A radio shielding device in a wearable apparatus with a radio communication function being used with it worn on a head part M of a user, includes a radio shielding material 11 on a part thereof, for protecting the head part without impairing the radio communication function, at a periphery of an electronic control device 9 having radio communication means and constituting the wearable apparatus.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radio wave shield device in a wearable device such as a smart helmet having a wireless communication function.

  It is well known to acquire biological information by attaching electrodes to a hat or a helmet (see Patent Documents 1 to 3). Examples of biological information include brain waves, heart rate, pulse wave, body temperature, and the like. In order to obtain this biometric information, it describes a system that measures bioimpedance, detects the fatigue level of a worker, drowsiness, etc., warns and prompts a break.

  In the above-described helmet and other wearable devices, information is transmitted and received with an external base station, a wireless router, or an access point by wireless communication means. This wireless communication means uses radio waves having a frequency of about 700 MHz to 5 GHz. That is, a wearable device having a wireless communication function emits radio waves of the above-described frequency, and there are various discussions about the influence of the radio waves on the human body. It is known that, in the absorption of radio waves to a dielectric, resonance absorption is efficiently performed on a dielectric having the same size as the wavelength. For example, the wavelength of a radio wave with a frequency of 2.4 GHz is about 12.5 cm, and thus is close to the size of the head. As a result, radio waves are protected against the head.

  Patent Documents 4 and 5 disclose a head protector or a hat that protects the head from radio waves of a mobile phone. A dome-shaped conductor covering the entire head is disposed inside the head protector or the hat. In patent document 4, the conductor which silver-plated on the surface of nylon fiber is used. In Patent Document 5, a conductive cloth in which metal yarns are knitted or woven is used. Patent Document 6 discloses that a pacemaker is protected from radio waves by partially attaching a protective sheet woven with silver-plated nylon fibers to clothes corresponding to the outside of the pacemaker.

  However, the ones described in Patent Documents 4 and 5 are configured to protect the entire head from radio waves by providing a radio wave shield material on the entire head protector or hat. Wearing the shield material is troublesome, and the head is stuffy, leading to discomfort. Moreover, Patent Documents 4 and 5 do not have a structure that exhibits a wireless communication function provided in the wearable device.

JP 2010-148718 A JP 2005-230030 A Utility Model Registration No. 3202884 Japanese Patent Laid-Open No. 10-8317 Utility Model Registration No. 3034280 JP-A-10-52506

  Accordingly, in view of the above-described situation, the present invention intends to solve the problem in a radio wave shield device in a wearable device equipped with a wireless communication function that is worn on a user's head, and the head is made of a radio wave shield material. An object of the present invention is to provide a radio wave shield device in a wearable device that effectively protects from radio waves and does not take time and effort to install a radio wave shield material.

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

(1)
A radio wave shield device in a wearable device equipped with a wireless communication function to be worn and used on a user's head, and hinders the wireless communication function around an electronic control device having a wireless communication means constituting the wearable device An electromagnetic wave shielding device in a wearable device, wherein an electromagnetic wave shielding material made of silver-plated fibers is partially provided to protect the head without any problems.

(2)
The radio wave shield device according to (1), wherein the radio wave shield material is disposed between the electronic control unit and a head and is disposed with a side opposite to the head open to the outside.

(3)
The wearable device is a radio wave shield device in a wearable device according to (1) or (2), wherein the wearable device is a helmet including one or more types of sensors.

(4)
The radio wave shielding device according to any one of (1) to (3), wherein the radio wave shielding material is laminated on the outside with a soft material.

(5)
The radio wave shield device according to any one of (1) to (4), wherein the radio wave shield material is formed of a thin film conductive material.

(6)
The radio wave shielding device for a wearable device according to any one of (1) to (5), wherein a pocket for storing the electronic control device is provided in at least a part of the inside of the wearable device.

  According to the radio wave shield device in the wearable device of the present invention as described above, since the entire head is not covered with the radio wave shield material made of silver-plated fiber, it is necessary to wrap the radio wave shield material around the head one by one when wearing a helmet or the like. Absent. Further, the problem of stuffiness due to the radio wave shielding material hardly occurs, and the cost can be reduced. In addition, since the outside of the electronic control device is open, it is possible to protect the head from radio waves without hindering the transmission and reception of information with the outside by the built-in wireless communication means.

  Further, when the wearable device is a helmet, if a radio wave shielding material made of silver-plated fiber is provided on the entire inside of the cap body, there is a possibility that it cannot withstand durability, energization, and water immersion test. Furthermore, since the structure is more complicated than other wearable devices worn by the head, it is difficult to form a fiber membrane on the inside.

  Further, when the outside of the radio wave shielding material is laminated with a soft material, the soft material absorbs the impact received by the wearable device attached to the head and protects the user's head from the impact. Furthermore, when the radio wave shielding material is formed of a thin film conductive material, the weight is lighter than that of a metal plate or the like, and the head is not damaged by the metal plate even when the wearable device is impacted. When the radio wave shielding material made of a thin film conductive material is laminated with a soft material, there is no possibility that the radio wave shielding material breaks through the soft material.

  When a pocket for storing the electronic control device is provided in at least a part of the inside of the wearable device, the electronic control device is not fixed with screws, so that repair and inspection can be easily performed, and sweat and dust It is possible to protect the electronic control device from dirt and dirt, and to prevent failure of the electronic control device. The electronic control device can be installed more easily than the case where the electronic control device is incorporated in the wearable device, can be externally attached to a wearable device such as an existing helmet, and the cost can be reduced.

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. It is a perspective view which shows a pocket member and a radio wave shielding material. It is a fragmentary top view which shows the buckle with a built-in 1st switch provided in the chin string. It is a flowchart for demonstrating ON / OFF operation | movement of the system power supply which consists of a 1st switch and a 2nd switch. It is a block diagram which shows the hardware constitutions of a smart helmet. It is the flowchart which showed operation | movement of a smart helmet. It is a block diagram which shows the detail of temperature measurement. It is a block diagram which shows the detail of an acceleration and angular velocity measurement. It is a graph which shows the example of a measurement of the acceleration and angular velocity in the motion of walking. It is a graph which shows the example of a measurement of the acceleration and angular velocity in the operation | movement of a bow. It is a graph which shows the example of a measurement of the acceleration and angular velocity in the operation which comes before.

  The smart helmet of the present invention acquires environmental data such as biometric data and outside temperature from various sensors provided on the helmet while the operator (user) wears it on the head M and uses it. Is acquired as body movement data. And these various acquisition data are processed with the signal processing means with which the helmet was equipped, and it transmits to the management server installed outside by the sequential wireless communication means. In the management server, personal information associated with the individual ID is stored, and the sent information is processed to monitor the physical condition such as worker fatigue. By using such a management system using a Sumet helmet, it is possible to manage the physical condition of the worker, prevent accidents before they occur, and improve work efficiency. Further, when the management server recognizes an abnormality of the worker, a warning signal can be transmitted to the worker's smart helmet so as to notify the worker.

  In addition, environmental information other than biological information and body movement information can be measured simultaneously, calculated by a signal processing device, distributed to the management server using a wireless communication device, and 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 for predicting signs of health deterioration and protecting yourself from dangerous conditions.

  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 smart helmet 1 of the present invention is put on the head of an operator M, FIG. 2 shows a side view of the smart helmet 1, reference numeral 2 denotes a cap body, 3 denotes a headband, 4 Indicates a chin string.

  1 and 2, a portion of the headband 3 that comes into contact with the forehead of the operator is provided with a biological information acquisition electrode 5 made of a conductive cloth having flexibility. The biological information acquisition electrode 5 also has a function as a contact sensor. In addition, a temperature / humidity sensor 6 and an acceleration / angular velocity sensor 7 are provided in the cap body 2 using the space at the top of the head, and the outside of the cap body 2, the illustrated one is located at a position located on the back of the head. A temperature / humidity sensor 8 is provided. Further, an electronic control unit 9 is provided at a proper position of the cap body 2, comprising signal processing means for processing signals from various sensors and wireless communication means for transmitting and receiving data to and from an external management server. Further, a battery 10 for supplying electric power to the various sensors 6, 7, 8 and the signal processing means 9A and the wireless communication means 9B is provided. For example, the electronic control device 9 is provided in the cap body 2 using the space at the back of the head, and the battery 10 is provided in a collar part outside the cap body 2. It is not limited. Further, although not shown, an image sensor for acquiring an operator's face image on the buttocks of the cap body is also provided. Furthermore, a position information sensor (GPS) is provided to acquire position information on the work site. Here, the acceleration / angular velocity sensor 7 and the GPS are often mounted on a smartphone or an information terminal having various wireless communication functions in recent years, and the miniaturization and the power saving are advanced, and they are provided as general-purpose parts.

  Since the electronic control device 9 generates high-frequency radio waves, it is necessary to protect the head from radio waves radiated from the wireless communication means. For this purpose, a radio wave shielding material 11 is disposed around the electronic control device 9 and at least on the head side. On the other hand, it is necessary not to shield communication radio waves radiated outward from the wireless communication means of the electronic control unit 9. In addition, since the radio wave radiated from the radio base station or the wireless router directly from the radio communication device provided in the management server or via the Internet communication network or the telephone network to the worker is weak, the radio wave to the head Do not shield.

  The electronic control device 9 is provided with a pocket for storing the electronic control device 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 in the back of the head inside the cap body 2 and stored in a pocket formed by the pocket member 12 and the inner surface of the cap body 2. The radio wave shielding material 11 is disposed between the head M and the electronic control device 9. Specifically, the radio wave shielding material 11 is laminated 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 back of the head inside the cap body 2 using a peripheral attachment piece 12D. A bag-like holding portion 12E opened upward is formed with the inner surface of the cap body 2, and the electronic control device 9 is stored in a pocket formed by the holding portion 12E and the inner surface of the cap body 2. Thereby, the radio wave radiated from the electronic control device 9 is shielded from propagation in the head direction by the radio wave shield material 11. Here, the shielding of radio waves means that radio waves are absorbed or reflected, or that propagation in a specific direction is limited by both absorption and reflection. The shield material 11 is configured. The electronic control device 9 can be fixed to the electromagnetic shielding material 11 or the cap body 2 with an adhesive, a magic tape, or the like.

  Specifically, the radio wave shielding material 11 is in the form of a thin film made of a conductive material, and may be any shape such as a plate shape, a wire mesh shape, or a fiber fabric shape, and the periphery thereof is laminated with a soft material. Among them, the conductive fiber fabric is most preferable in terms of touching the skin, not damaging the head, and not piercing the laminated soft material. In this embodiment, AGpos (registered trademark) manufactured by Mitsufuji Corporation is employed as the radio wave shielding material 11. The radio wave shielding material 11 is a woven fabric made of silver-plated fibers, but may be plated with a conductive material such as nickel, copper-nickel, or aluminum other than silver. Silver is most preferable because it has little influence on the human body.

  The material of the pocket member 12 may be anything such as fiber, wood, paper, leather, foamed polystyrene, foamed polypropylene, rubber elastomer material, polyurethane, etc. as long as it is flexible. Polyurethane is the best.

  In the case of the smart helmet 1, the pocket member 12 may be installed anywhere on the inside, outside, inside, chin strap, etc. of the head-mounted item, but in order to prevent the electronic control device 9 from being damaged, And around the back of the head is most preferable. Although the present invention is not limited to the smart helmet 1, head-mounted wearable devices other than the smart helmet 1 include hats, wigs, masks, costumes, headgear, masks, glasses, goggles, hair bands, headbands, etc. These are equipped with a wireless communication function. The contents stored in the pocket member 12 include transmitters, transmitters / receivers, telephones, music / video players, smartphones and other terminals, USB connection terminals, batteries and other electronic devices, and other miscellaneous goods such as amulets and coins. In the helmet for cycling, food and drink can be stored together with the wireless communication means.

  The smart helmet 1 is based on various sensors attached to the helmet worn by the worker, personal biological data of the field worker in the workplace, work environment data, image data of the worker, body movement related to the movement of the helmet and the worker. Measure data and manage the physical condition of workers. Typically, the smart helmet 1 detects an abnormal state of an operator by comparing data at the time of field work with an abnormal threshold value determined from data measured and accumulated in the past. Thereby, the health status of the worker is determined, and the health and safety status of the worker is easily grasped by notifying the manager or the like. In addition, by accumulating analysis data, it is possible to predict signs of health deterioration. Furthermore, it is possible for the operator or administrator to manually cancel the erroneous determination of the sensor, the malfunction of the switch, or the abnormality determination, and by accumulating the erroneous determination and malfunction data, It is also possible to employ a program that automatically calibrates the system based on the accumulated data so that the erroneous determination and malfunction do not occur. In particular, the system is effective in that erroneous determination and malfunction may occur due to the method adopted in the fixing method of the electronic control device 9 described above.

  Here, the work environment data is the temperature, humidity, and position information at the work site, and the biological data is an electroencephalogram, heart rate, pulse rate, body temperature, body temperature, deep body temperature, blood flow, electrocardiogram, myoelectricity, sweating. The image data is a face image of the worker, and the body motion data relating to the movement of the helmet and the worker is acceleration and angular velocity (gyro).

  The biometric data is measured by the biometric information acquisition electrode 5 (contact sensor) for changes in bioelectrical impedance due to electroencephalogram, heart rate, pulse rate, body temperature, body temperature, deep body temperature, blood flow, electrocardiogram, myoelectricity, sweating, and the like. To get by. The body temperature may be acquired by providing a separate temperature sensor. The work environment data acquired by the various sensors attached to the cap body 2 is temperature (air temperature), humidity, position information, or rainfall conditions, and the body motion data is information on the operation of the helmet and the body. The electronic control unit 9 is mounted to stably measure and analyze the information simultaneously, and information can be distributed to the management server by using wireless communication means so that the situation can be known on the screen. As the biometric information acquisition electrode 5, AGposs (registered trademark) manufactured by Mitsufuji Corporation is preferably adopted in consideration of washing durability in addition to flexibility and flexibility.

  When the smart helmet 1 is used, a combination switch provided at an appropriate position of 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 automatically turned off when the smart helmet 1 is removed from the head. The second switch maintains the ON state only when the helmet switch of the user is detected based on the change in the head impedance of the contact sensor only when the first switch is in the ON state, and detects that the helmet is not worn. Sometimes it is in an OFF state. The system power supply is turned on only when both the first switch and the second switch are turned on, and power is continuously supplied from the battery 10 to the various sensors 6, 7, 8 and the electronic control device 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 may be a lithium battery or an alkaline battery, for example. Although not shown, when the battery 10 is built in a transmitter or a sensor, the wiring in the smart helmet 1 can be simplified, and further, since it is not necessary to provide a packing or the like in the connecting portion, waterproofness is improved. Furthermore, when the battery 10 is a small button-type battery or a coin-type battery, the overall weight of the smart helmet 1 is reduced, so that the burden on the operator is reduced. In addition, the smart helmet 1 can 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 simultaneously by hooking the smart helmet 1 on the wall. 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 or the like of the battery remaining amount by wireless communication means can be adopted. A means for indicating can also be adopted.

  A specific configuration of the system power supply will be described below. In the present embodiment, the first switch is integrated into the buckle 13 of the chin string 4. The buckle 13 has a structure in which the first member 13A and the second member 13B provided at the ends of the chin strings 4 and 4 on both sides can be engaged with and disengaged from each other, and any of the first member 13A and the second member 13B On the other hand, a small switch such as a limit switch is built in, and when connected, the other is detected and connected. That is, when the helmet is worn and the buckle 13 of the chin string 4 is connected, the first switch is activated and turned on. 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 with only the first switch, the helmet 13 may be suspended in a state where the buckle 13 is connected when the helmet is stored. In this 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 this purpose, the second switch is required to recognize from the change in the head impedance of the contact sensor that the worker has worn the helmet. This 2nd switch is comprised by the auto power-off circuit which determines attachment / detachment of a helmet. Specifically, after the first switch is turned on, when the presence of the head is recognized (a helmet is worn), the hold circuit remains on and the presence of the head cannot be recognized (a helmet is not worn) ) Is set so that the hold circuit is turned off. Here, the change in the head impedance of the contact sensor is used to recognize the presence of the head.

  In this embodiment, the contact sensor used for the second switch is an impedance change that occurs when the biological information acquisition electrode 5 (contact sensor) contacts or approaches the skin. The system power ON / OFF operation will be described with reference to FIG. First, the case where a helmet is worn will be described. When the worker wears the helmet on the head and connects the buckle 13 of the chin string 4, the first switch is turned on. When the first switch is turned on, a current flows through the biological information acquisition electrode 5 to detect a change in impedance due to contact with or approaching the skin. By detecting the impedance change, it is determined that the helmet is worn, the hold circuit is maintained in the ON state, the second switch is turned on, and the system power is turned on. This determination is performed by the electronic control unit 9. Once the second switch is in the ON state and connected, it maintains the connection state regardless of the subsequent impedance change. 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 supply is turned off.

  When removing the helmet 13 when the buckle 13 of the chin string 4 is removed, the system power is automatically turned off when the first switch is turned off. Then remove the helmet from the operator's head. And when storing the helmet, it is hooked on the hook of the rocker with the buckle 13 of the chin string 4 connected (first switch ON state), but since the impedance does not change, it is determined that the helmet is not worn. The switch is not turned on, and the system power is turned off.

  As described above, the system power is turned ON / OFF by combining the first switch that is always operated when the helmet is worn and the second switch configured by the auto power-off circuit that determines whether the helmet is attached or detached. Malfunctions such as supplying power from the battery when not worn can be prevented. In addition, since the contact sensor is provided on the periphery of the head, there is no need to tighten the helmet tightly, and the smart helmet will continue to operate if it is in contact with or close to the forehead even when the helmet is displaced during work. . In addition, if the impedance change by the contact sensor is used to determine whether the helmet is worn or not, it is superior to the temperature sensor in that it does not depend on the response speed or the environment, and a complex configuration such as an infrared ray or illuminance sensor is required. However, it can be realized at low cost. Further, the head is not compressed like a pressure sensor, and there is no pain even if a worker in a factory wears it for a long time. In addition, once the second switch is connected, if the connection state is maintained regardless of the change in impedance, even if the helmet is displaced and the contact sensor is detached from the forehead, as long as the first switch is connected, The smart helmet continues to operate. If the system power is automatically turned off when the first switch is turned off, the power is automatically turned off, so that the power consumption of the battery can be suppressed, and there is no need to provide an individual manual switch. The troublesome operation of turning off the power becomes unnecessary. Further, by providing the contact sensor at the forehead corresponding portion of the headband 3, it is possible to make the contact more stable and reliable as compared with other portions.

  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. Other forms of ON / OFF operation of the switch include a button type, manually tying the string, etc. Applicable to all types of connection. Moreover, it is also possible to energize by creating and connecting a chin string and a buckle with a conductive material. In that case, there are a case where the chin string itself is made of a conductive fiber, and a case where a conductive wire is provided in the chin string. In addition, various sensors and manual switches may be employed as the first switch. For example, a contact sensor may be disposed on the frame portion of the glasses.

  As described above, AGpos (registered trademark) manufactured by Mitsufuji Corporation was adopted as the second switch (contact sensor). However, the material may be any conductive fiber such as silver, nickel, copper nickel, etc. Silver with the least impact on the human body is the best. Further, the form may be anything such as a plate shape, a wire shape, or a fiber shape, but the fiber shape is the best in terms of touch to the skin. The outer shape may be anything as long as it has a certain area, such as a rectangle, a circle, or a triangle. The size is not particularly limited, but is determined by balancing the contact rate with the skin and the cost. In the present embodiment, a contact sensor whose impedance is changed by contact is used to acquire biometric data. However, a temperature sensor, an illuminance sensor, or an infrared sensor that detects the presence of the head by infrared rays may be used. Further, the position where the contact sensor is provided may be anywhere around the head, such as the forehead, ear, nape, cheek, neck, etc., but the circumference around the forehead inside the helmet is most preferable in terms of allowing stable contact with the skin. . Further, when a contact sensor is provided on the chin strap, it is possible to detect the contact of the cheek, neck, and ear. Further, a contact sensor can be provided on the nose pad of the glasses.

  Next, the hardware configuration of the smart helmet 1 will be briefly described with reference to a block diagram in FIG. Further, various sensors are connected to the above-described 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 on the temperature / humidity sensor 21 and the biological information sensor 22 is sent to the biological information detection unit 26 to acquire biological data. Information of the acceleration sensor 23 and the angular velocity sensor 24 is sent to the impact information detection unit 27 to acquire body motion data. The information of the image sensor 25 is sent to the image information detection unit 28, and image data is acquired.

  The biological data detected by the biological information detection unit 26 is processed by the biological information processing unit 29. When a biological abnormality is detected by the biological 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 abnormality information to the abnormality notification unit 34 as necessary. To the report destination 36 together with the position information acquired by the position information sensor 37. And the confirmation for confirming the condition of the user of a smart helmet via the wireless communication means 35 is performed from the report destination 36 as needed. This is the answer back function 38.

  On the other hand, the body motion data detected by the impact information detection unit 27 is processed by the impact information processing unit 39, and when a body motion abnormality is detected by the impact abnormality detection unit 40, the impact abnormality processing unit 41 performs a notification determination unit. The information is sent to 33, the notification determining unit 33 sends the abnormality information to the abnormality reporting unit 34 as necessary, and the location information sensor 37 acquires the location information to the reporting destination 36 such as an external management server by the wireless communication means 35. Send with information. Further, the image data detected by the image information detection unit 28 is processed by the image information processing unit 42, the notification determination unit 33 sends the face image information to the abnormality notification unit 34, and the wireless communication means 35 provides an external management server. Or the like to the report destination 36. The face image information is used for checking the worker's state by the sun back-up 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 operator's face image data are not measured constantly by measuring intermittently at a predetermined time or time interval, so that battery consumption is suppressed. The battery can be downsized.

  Further, in this embodiment, after the worker wears the helmet, the initial data at the start of the worker's work for a certain period of time is measured, and the abnormal threshold is determined by comparing with the past threshold data. Based on the fact that the abnormal value changes accordingly, the abnormal threshold value can be set with high accuracy.

  In this embodiment, when the value detected by the temperature sensor exceeds the abnormal threshold, if the cooling system that cools 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 is detected, it is possible to respond quickly by notifying the worker or a management system that manages the worker.

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

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

  Next, the outline of the operation of the smart helmet will be described with reference to the flowchart shown in FIG. First, as described above, the system power is turned on to start. Then, temperature, humidity information, and biological information are acquired by various sensors, and compared with the latest or previous data. If the temperature and humidity are abnormal compared to the abnormal threshold, a temperature / humidity abnormal flag is issued, and if the biological information is abnormal compared to the abnormal threshold, a biological abnormal flag is issued. If there are no abnormalities, proceed to the next step.

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

  The above measurement operation is repeatedly performed while the helmet is worn. When the chin string 4 is removed and the helmet is removed, 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 a 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 a threshold value is determined. And it measures continuously for 5 minutes after helmet wearing, and determines an initial value. If the initial value of the temperature is within the threshold, the measurement timing is set to 30 minutes / time to suppress battery consumption. If the initial value of the temperature is outside the threshold, continuous measurement is performed for 30 minutes thereafter, and if the temperature is within the threshold, the measurement timing is set to 30 minutes / time to suppress battery consumption. If the temperature measured once every 30 minutes falls outside the threshold, continuous measurement is performed again for 30 minutes. If the measured temperature is still outside the threshold, the management server or the operator is notified. In addition, for a certain period of initial use of the smart helmet (for example, for one month of use) where past data has not been accumulated, the measurement timing is 5 minutes / time, and while accumulating some 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 and the worker will be described with reference to the block diagram shown in FIG. Measurement using an acceleration / angular velocity sensor is to detect an abnormal operation such as a worker's falling, and is therefore constantly measured. 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 always started and sampled every 10 msec. If the value (absolute value) at this time is out of the threshold value, the process proceeds to the fall determination, a plurality of fall patterns are set in advance, and the fall is judged by comparing with them. . Here, when it falls, it notifies a management server or a worker. In addition, when the fall determination is out of the determination, that is, when the fall is not considered, the measurement is always returned to the measurement.

  Note that the above-described measurement time and measurement interval are not limited to the above-described 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 performed. A test body is a silver plating fiber fabric, a silver plating fiber nonwoven fabric, a silver plating fiber knit knitting, a nickel-copper fiber fabric, and a copper mesh. First, the measurement frequency range of 100 kHz to 1 GHz was performed by an electromagnetic shield evaluation method developed at KEC (Kansai Electronics Industry Promotion Center). In this evaluation method, a 150 mm × 150 mm flat specimen was sandwiched between jigs for measuring the near electric field shield effect and measuring the near magnetic field shield effect. The measurement frequency range of 1 GHz to 15 GHz is measured by sandwiching a 300 mm × 30 mm flat specimen in a DFFC (Dual-Focus Flat Cavity) fixture having an elliptical inner shape. This evaluation method is performed by connecting a network analyzer to transmission / reception points at two focal points of an ellipse.

  As a result of the measurement, the measurement frequency is in the range of 100 kHz to 1 GHz, and the electric field shield characteristic is 40 dB even with one specimen of silver-plated fiber fabric, one specimen of nickel-copper fiber fabric, and one specimen of copper mesh. Although it has a shielding performance exceeding, in a two-ply test specimen of silver-plated fiber nonwoven fabric, when it exceeds about 80 MHz, it tends to decrease to 40 dB or less. Naturally, the shielding performance is improved by increasing the number of sheets. In addition, in the magnetic field shielding characteristics, the shielding performance improves as the frequency increases for each specimen, and the single specimen of the copper mesh has high shielding performance as a whole, but three layers of silver-plated fiber fabrics are stacked. The specimen has a shielding performance of about 30 dB at 1 GHz. In addition, although the shield performance exceeded 40 dB in the range of about 50 MHz for the three-layer test specimen of nickel-copper fiber fabric, it was found that the two-layer test specimen of silver-plated fiber nonwoven fabric had no shielding performance.

  Next, when the measurement frequency is in the range of 1 GHz to 15 GHz, especially in the vicinity of 2.4 GHz used for wireless communication, the shield performance exceeds 40 dB. A two-ply test specimen of a fiber fabric, a single-ply test specimen of a nickel-copper fiber woven fabric, and a two-ply test specimen of a nickel-copper fiber woven fabric. On the other hand, the single-sheet specimen of the silver-plated fiber woven fabric has a shielding performance slightly lower than 40 dB. Further, the three-layer specimen of the silver-plated fiber nonwoven fabric, the two-layer specimen of the silver-plated fiber nonwoven fabric, and 1 It becomes lower in order of the sheet test body, and the silver-plated fiber knitted one-sheet test body is also 20 dB or less.

  From the above radio wave shielding test, it can be seen that by using two or more layers of the silver-plated fiber fabric, it is possible to shield radio waves having a frequency used in normal wireless communication means with a shielding performance of 40 dB or more. . 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 a required standard for the radio wave shield. The specimens used in this measurement test have different fiber densities and weights per unit, so it is difficult to make simple performance comparisons. However, in the 2.4 GHz band such as Wi-Fi (registered trademark) and Bluetooth (registered trademark). It can be seen that the radio wave can be shielded by a nickel-copper fiber fabric or a silver-plated fiber fabric.

  Finally, the test results when the worker performs some typical operations while wearing the smart helmet 1 are shown. FIG. 10 shows measurement data of three axes (x, y, z) of acceleration and angular velocity in a normal walking motion. Of the three axes, the x-axis indicates the front-rear direction of the operator, the y-axis indicates the height vertical direction, and the z-axis indicates the lateral direction of the worker. FIG. 11 shows three-axis measurement data of acceleration and angular velocity in the bowing motion. FIG. 12 shows three-axis measurement data of acceleration / angular velocity in a previous motion. The pattern of acceleration / angular velocity data is clearly different between the case of falling and the normal operation, and these can be distinguished by the fall determination.

1 Smart helmet (wearable device)
2 Cap body 3 Headband 4 Chin string 5 Biological 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 shielding material 12 Pocket member (pocket)
13 Buckle (1st 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 Biological information detection unit 27 Impact information detection unit 28 Image information detection unit 29 Biological information processing unit 30 Biological abnormality detection unit 31 Cooling system 32 Biological abnormality processing unit 33 Notification determination unit 34 Abnormality notification unit 35 Wireless communication means 36 Report destination 37 Position information sensor 38 Answer back function 39 Impact information processing unit 40 Impact abnormality detection unit 41 Impact abnormality processing unit 42 Image information processing unit M Head

(1)
A radio wave shield device in a wearable device equipped with a wireless communication function to be worn and used on a user's head, and hinders the wireless communication function around an electronic control device having a wireless communication means constituting the wearable device An electromagnetic wave shielding device in a wearable device, wherein an electromagnetic wave shielding material is partially provided to protect the head without any problems.

  According to the radio wave shield device in the wearable device of the present invention configured as described above, since the entire head is not covered with the radio wave shield material, it is not necessary to wrap the radio wave shield material around the head when wearing a helmet or the like. Further, the problem of stuffiness due to the radio wave shielding material hardly occurs, and the cost can be reduced. In addition, since the outside of the electronic control device is open, it is possible to protect the head from radio waves without hindering the transmission and reception of information with the outside by the built-in wireless communication means.

  In addition, when the wearable device is a helmet, if a radio wave shield material is provided on the entire inside of the cap body, the radio wave shield material may be made of silver-plated fibers, which may not be able to withstand durability, energization, and water immersion tests. This is not the case because it is partially provided. Furthermore, since the structure is more complicated than other wearable devices worn by the head, it is difficult to form a fiber membrane on the inside.

Claims (6)

  A radio wave shield device in a wearable device equipped with a wireless communication function to be worn and used on a user's head, and hinders the wireless communication function around an electronic control device having a wireless communication means constituting the wearable device An electromagnetic wave shielding device in a wearable device, wherein an electromagnetic wave shielding material made of silver-plated fibers is partially provided to protect the head without any problems.   2. The radio wave shielding device in a wearable device according to claim 1, wherein the radio wave shielding material is disposed between the electronic control unit and a head and is disposed with an opposite side to the head open to the outside.   The radio wave shielding apparatus for a wearable device according to claim 1 or 2, wherein the wearable device is a helmet including one or more types of sensors.   The radio wave shielding device for wearable devices according to any one of claims 1 to 3, wherein the radio wave shielding material is laminated on the outside with a soft material.   The radio wave shielding apparatus for wearable equipment according to any one of claims 1 to 4, wherein the radio wave shielding material is formed of a thin-film conductive material.   The radio wave shielding apparatus for a wearable device according to any one of claims 1 to 5, wherein a pocket for storing the electronic control device is provided in at least a part of the inside of the wearable device.

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