JP2017060659A - Mounting support program, mounting support method, and head-mounted device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To calculate the desired position of a sensor of a head-mounted device.SOLUTION: A program supports the mounting of a head-mounted device including an optical sensor for measuring at least one of blood flow of the head of a user and a change in hemodynamics, a flexible mounting part for holding the optical sensor so that the optical sensor can be positioned at the periphery of the head of the user, and a strain sensor for detecting strain corresponding to flexure when the mounting part is mounted on the head of the user. This mounting support program causes a computer to acquire a detection signal of the strain sensor, determine a positioning target position of the optical sensor on the mounting part according to the detection signal of the strain sensor, and support the user.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mounting support program, a mounting support method, and a head mounting apparatus.

  Conventionally, a biological light measurement device (head-mounted device) that is attached to the head called a headset and has a plurality of probes (sensors) is provided with a near-infrared irradiation unit and a near-infrared detection unit, and blood flow on the brain surface There is provided an information processing system that detects information indicating the activity state of the brain by detecting a change in data and processing the detected data with a data processing device.

JP 2000-37558 A

  In order to efficiently measure brain activity, it is required to install a sensor at an appropriate position depending on the structure of the subject's head or the task. However, due to variations in head circumference depending on the subject, it is required to manually measure the head circumference according to international standards (international 10-20 electrode placement method). Therefore, it is required to more easily arrange the sensor at an appropriate position.

  An object of this invention is to calculate the desired position of the sensor of a head mounting apparatus.

In order to solve the above problems, the following means are adopted.
That is, the first aspect is
An optical sensor for measuring at least one of the changes in blood flow and hemodynamics of the user's head and a flexible mounting portion for holding the optical sensor so as to be positioned on the outer periphery of the user's head And a head support device that includes a strain sensor that detects strain according to deflection when the mounting portion is mounted on the user's head, and a computer,
Obtaining a detection signal of the strain sensor;
Determining a positioning target position of the optical sensor on the mounting portion according to a detection signal of the strain sensor, and assisting the user;
This is a mounting support program for executing the above.

  An aspect of the disclosure may be realized by executing a program by an information processing device. That is, the disclosed configuration can be specified as a program for causing the information processing apparatus to execute the processing executed by each unit in the above-described aspect, or a computer-readable recording medium on which the program is recorded. Further, the disclosed configuration may be specified by a method in which the information processing apparatus executes the process executed by each of the above-described units. The configuration of the disclosure may be specified as a system including an information processing apparatus that performs the processing executed by each of the above-described units.

  The step of describing the program includes processes that are executed in parallel or individually even if they are not necessarily processed in time series, as well as processes that are executed in time series in the described order. Some of the steps describing the program may be omitted.

  According to the present invention, it is possible to calculate a desired position of the sensor of the head mounted device.

FIG. 1 is a diagram illustrating a configuration involved in information processing of an information processing system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration example of the head-mounted device. FIG. 3 is a diagram illustrating a configuration example of a user terminal. FIG. 4 is a perspective view illustrating the external appearance of the head-mounted device viewed from below. FIG. 5 is a front view of the head-mounted device viewed from the front. FIG. 6 is a diagram illustrating an example of an operation flow of the information processing system. FIG. 7 is a diagram illustrating an example of a graph showing the relationship between the strain of the head-mounted device and the head circumference. FIG. 8 is a diagram illustrating an example of a graph showing the relationship between the user's head circumference and the sensor position (desired position of the sensor). FIG. 9 is a diagram illustrating a configuration example 1 of the head-mounted device according to the first modification. FIG. 10 is a diagram illustrating a configuration example 2 of the head-mounted device according to the first modification.

  Hereinafter, embodiments will be described with reference to the drawings. The configuration of the embodiment is an exemplification, and the configuration of the invention is not limited to the specific configuration of the disclosed embodiment. In carrying out the invention, a specific configuration according to the embodiment may be adopted as appropriate.

Embodiment
(Configuration example)
FIG. 1 is a diagram illustrating a configuration involved in information processing of an information processing system according to an embodiment of the present invention. As shown in FIG. 1, the information processing system includes a head-mounted device 10 and a user terminal 20. The information processing system detects measurement data (also referred to as a detection value) that indicates a change in blood flow and / or a change in hemodynamics from the user's head, and obtains brain activity information that indicates the activity state of the user's brain. get.

FIG. 2 is a diagram illustrating a configuration example of the head-mounted device. The head mounting device 10 includes a control unit 11, a wireless communication unit 13, sensors 115 and 125, and a strain measurement unit 15 as aspects of information processing. The control unit 11 controls measurement and communication of the head-mounted device 10. The control unit 11 includes, for example, a processor such as a CPU (Central Processing Unit) or DSP (Digital Signal Processor) and a memory, and executes processing using a computer program, firmware, or the like that is executed on the memory. . However, the control unit 11 activates the wireless communication unit 13, the sensors 115 and 125, and the strain measurement unit 15, and uses a dedicated hardware circuit, FPGA (Field Programmable Gate Array), or the like that executes cooperation processing with each component. There may be. The control unit 11 may be a mixture of a CPU, a DSP, a dedicated hardware circuit, and the like. Here, the head-mounted device 10 has the two sensors 115 and 125, but the head-mounted device 10 may have three or more sensors.

  The head mounting device 10 has a structure in which a headband is wound around a user's head and fixed to the user's head by fastening a fixing member.

The wireless communication unit 13 is connected to the control unit 11, the sensors 115 and 125, and the strain measurement unit 15 through a predetermined interface. However, the wireless communication unit 13 may be configured to acquire data from the sensors 115 and 125 via the control unit 11. Wireless communication unit 13
Communicates with the user terminal 20 via the network N1. The network N1 is a network work according to standards such as Bluetooth (registered trademark), wireless LAN (Local Area Network), ZigBee, and the like. The wireless communication unit 13 is an example of a transfer unit. However, in the information processing system, the standard of the wireless interface of the wireless communication unit 13 is not limited.

  At the time of communication in the network N1, an identifier for identifying the head-mounted device 10 is embedded in the header portion of the communication header or the user data portion (payload portion) in the communication data, and the user terminal 20 receives the user ( (Subject) can be identified.

  In the information processing system, a communication unit that performs wired communication instead of the wireless communication unit 13 or together with the wireless communication unit 13 may be provided. That is, the head-mounted device 10 and the user terminal 20 may be connected by a wired communication interface. In this case, the interface for wired communication is not limited, and various interfaces such as USB (Universal Serial Bus) and PCI Express can be used according to the use of the information processing system.

  The sensors 115 and 125 irradiate the head with visible light or near-infrared light, receive visible light or near-infrared light that is partially absorbed and scattered near the cerebral cortex of the brain, and convert it into an electrical signal. In the cerebral cortex of the brain, for example, changes in blood flow and / or hemodynamics differ depending on the activity state of the brain. As a result, in each part of the cerebral cortex, the amount of hemoglobin bound to oxygen in the blood and the amount of hemoglobin not bound to oxygen change. Due to a change in the amount of hemoglobin, a change in the amount of oxygen, or the like, the absorption characteristic or scattering characteristic of visible light or near infrared light near the cerebral cortex changes. The sensors 115 and 125 are visible light or near infrared light whose light amount changes due to changes in the absorption rate or transmittance of visible light or near infrared light according to the blood flow and / or hemodynamic state in the vicinity of the cerebral cortex. Is converted into an electrical signal and output. The sensors 115 and 125 are identified by an identifier, for example.

The sensors 115 and 125 include, for example, a visible light or near infrared light source that emits visible light or near infrared light, and a light receiving unit that receives visible light or near infrared light. The light source for visible light or near infrared light is, for example, an LED (Light Emitting Diodes), a visible light lamp, an infrared lamp, or the like. The light receiving unit includes a photoelectric element such as a photodiode or a phototransistor, an amplifier, and an AD (Analog Digital) converter. The light source for visible light or near infrared light and the light receiving unit do not have to be provided in pairs. For example, a plurality of light receiving units may be provided for one visible light source or near infrared light source. The light receiving unit is an example of a light detection unit. The sensors 115 and 125 may further include a light source for detecting the wearing state. The light source for mounting state detection is, for example, an LED or the like. When the sensors 115 and 125 do not have a light source for wearing state detection, the light source for wearing state detection is substituted with a light source for visible light or near infrared rays. Each light source is an example of a light irradiation means.

  The strain measuring unit 15 measures the strain of the head-mounted device 10. The head mounting device 10 is bent (bent) along the shape of the head of the user (subject) and contacts the head. The curvature of the curved portion of the head mounting device 10 varies depending on the shape of the head. The strain measurement unit 15 measures the strain of the curved portion. The strain measurement unit 15 includes a strain gauge 150 that detects strain. The strain gauge 150 is affixed to a curved portion of the head mounting device 10. The strain gauge 150 is a device that detects strain by utilizing the fact that the electrical resistance changes according to the amount of strain. The strain gauge 150 is an example of a strain sensor.

The user terminal 20 acquires change data of absorption or transmittance of visible light or near infrared light in the vicinity of the user's cerebral cortex from the head-mounted device 10, and various information related to the activity state of the user's brain. Services that include sensitive information processing. The user terminal 20 is an example of an information processing apparatus (computer). The user terminal 20 includes a PC (Personal Computer), a smartphone,
It can be realized by using a dedicated or general-purpose computer such as a mobile phone, a tablet terminal, a car navigation device, a PDA (Personal Digital Assistant), a game machine (game device), or an electronic device equipped with a computer. The user terminal 20 can be installed in, for example, a fitness club or a learning school.

  FIG. 3 is a diagram illustrating a configuration example of a user terminal. The user terminal 20 includes a CPU 21, a memory 22, a wireless communication unit 23, a public line communication unit 24, a display unit 25, an operation unit 26, an output unit 27, an imaging unit 28, and a positioning unit 29. And a physical sensor unit 2A. The CPU 21 executes processing as the user terminal 20 by a computer program that is executed in the memory 22 so as to be executable. The processing as the user terminal 20 is, for example, a service including various information processing related to the activity state of the user's brain. The CPU 21 that executes such a computer program is an example of an analysis unit.

  The memory 22 stores a computer program executed by the CPU 21 or data processed by the CPU 21. The memory 22 may include volatile memory and non-volatile memory.

  The wireless communication unit 23 is the same as the wireless communication unit 13 of the head-mounted device 10. The wireless communication unit 23 is an example of a receiving unit. Further, the user terminal 20 may include a communication unit that performs wired communication instead of the wireless communication unit 23 or together with the wireless communication unit 23.

The public line communication unit 24 communicates with a server on the network N2, for example, the server (arithmetic unit) 3 and the like (not shown) via the network N2. The network N2 is a public line network, for example, a mobile phone network. When the network N2 is a mobile phone network, the public line communication unit 24 connects to the network N2 via a base station of the mobile phone network. However, the network N2 may be a network including an access network to the communication device of the Internet service provider and the Internet. An access network to a communication device of an Internet connection company is, for example, an optical network provided by a communication carrier, ADSL (Asymmetric Digital Subscriber Line), or the like. The network N2 is an example of a public wireless network. The public line communication unit 24 is an example of public wireless communication means. However, in this information processing system, the network N2 is not limited to the public line network. For example, a private network such as a local area network (LAN), a company, an operator, a government office, a school, a research institution, etc. It may be a wide area network such as VPN (Virtual Private Network). Hereinafter, companies, businesses, government offices, schools, research institutions, etc. are also referred to as companies.

  The display unit 25 is, for example, a liquid crystal display, an EL (Electro-Luminescence) panel, and the like, and displays output information from the CPU 21. The operation unit 26 is, for example, a push button, a touch panel, or the like, and accepts a user operation. The output unit 27 is, for example, a vibrator that outputs vibration, a speaker that outputs sound or sound, and the like. The imaging unit 28 is a camera including a solid-state imaging element, for example. As the solid-state image sensor, a CCD (Charge-coupled device) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like can be used.

The positioning unit 29 is a GPS (Global Positioning System) receiver, for example,
Receives radio waves from the satellite and calculates the current position (latitude, longitude, etc.), time, etc. However, the positioning unit 29 is not limited to the one having a GPS receiver. For example, when the public line communication unit 24 is a mobile phone network, the positioning unit 29 may perform positioning based on the distance from the mobile phone base station.

  The physical sensor unit 2A is, for example, an acceleration sensor or an angular acceleration sensor. However, the physical sensor unit 2A may be a temperature sensor, a humidity sensor, an atmospheric pressure sensor, or a water pressure sensor.

<Structure example of head mounted device>
FIG. 4 is a perspective view illustrating the external appearance of the head-mounted device 10 as viewed from below. FIG. 5 is a front view of the head-mounted device 10 as viewed from the front. However, in FIG. 5, the fixing member 101 illustrated in FIG. 4 is omitted. Here, the lower rear means a position behind the user when the user wears the head mounting device 10 and a position where the user's head is looked up from below. Moreover, the front means the front of the user (wearer) when the user wears the head mounting device 10, for example. Furthermore, “above” means, for example, above the user. Hereinafter, the part of the head mounting device 10 located on the right side of the user wearing the head mounting device 10 is referred to as the right side portion or the right side. Further, the portion of the head mounting device 10 located on the left side toward the user wearing the head mounting device 10 is referred to as the left side portion or the left side. Moreover, the surface of the head mounting apparatus 10 which contacts a user is called a back surface. The opposite side of the back side is called the front side. The surface is a surface that can be seen from around the user when the user wears the head-mounted device 10.

  As illustrated in FIG. 4, the head mounting device 10 has a structure in which the head mounting device 10 is wound around the head of the user and mounted on the head, and is fixed to the user's head by fastening the fixing member 101. Therefore, the head mounting device 10 includes a belt-like base material 100 that is curved in a space slightly larger than a human head, and fixing members 101 that are fixed to both ends of the base material 100. The fixing member 101 has wire rods 110 and 120 extending from both ends of the base material 100 and a fastener that pulls and fixes the wire rods 110 and 120 in pairs. The base material 100 forms an outer surface away from the user's head surface. That is, the head mounting apparatus 10 has a structure in which the base material 100 that is a member that maintains the shape is disposed on the outer surface away from the head. The base material 100 is made of, for example, a resin. However, the material of the base material 100 is not limited.

  In the present embodiment, the structure, shape, and material of the fixing member 101 are not limited. For example, in FIG. 4, the fixing member 101 includes the wire rods 110 and 120, but a belt-like member may be used instead of the wire rod. The fastener may have any structure.

  As shown in FIG. 4, a battery box 102 is provided at the right end of the base material 100 of the head-mounted device 10. The battery box 102 is a flat and substantially hexahedron, and both the area of the front surface and the area of the back surface are larger than the areas of the four side surfaces. A groove (not shown) is provided on the back surface of the battery box 102. An intermediate portion of the wire 120 extending from the right end portion of the substrate 100 is fitted in this groove. Therefore, the battery box 102 is fixed at the right end portion of the base material 100 and is fixed to the head mounting device 10 by inserting the wire 120 into the groove.

  Two rounded housings 111 and 121 are provided in the vicinity of both front side ends of the base material 100 of the head mounting device 10. The housings 111 and 121 accommodate a signal processing circuit, a control board having a communication circuit, and the like. As shown in FIG. 5, when the head mounting device 10 is viewed from the front, the two housings 111 and 121 appear to be located on both sides of the head mounting device 10.

As shown in FIG. 5, strip-shaped openings 114 and 124 are formed in the vicinity of the front side of the base material 100, and knobs 112 and 122 are inserted into the openings 114 and 124, respectively. The knobs 114 and 124 are respectively connected to left and right sliders (not shown) provided along the back surface of the substrate 100. On the other hand, as illustrated in FIG. 4, the sensors 115 and 125 are fixed to the slider on the back surface of the base material 100. Therefore, by moving the knob 112 or the knob 122 relative to the base material 100 along the strip-shaped opening 114 or the opening 124, the sensor 115 or 125 can be moved on the back surface side. It is. Furthermore, a screw is formed coaxially with the knobs 112 and 122, and the position of the sensor can be fixed by a screw type. The knobs 112 and 122 are an example of means for positioning.

  In FIG. 5, the knob has a short cylindrical shape, but the shape of the knob is not limited. Further, in FIG. 5, scales are engraved along the longitudinal direction of the strip-shaped opening 114 and the opening 124. The scale has a shape in which the scale at the center position and the scales other than the center position are different so that the center position can be understood. In FIG. 5, the scale at the center position has a triangular shape with the apexes facing the openings 114 and 124, while the scale other than the center position is formed in a circular shape or a dot shape. Each scale is assigned a number (value) so as to increase from the inside toward the outside. For example, the number at the center position is 0, and the scale numbers are assigned so that -1, -2, -3, 0, +1, +2, +3 from the inside.

  As illustrated in FIG. 4, the sensors 115 and 125 have a shape in which three windows are provided on a flat plate. A visible light or near-infrared LED is provided as a light source for visible light or near-infrared light in one window portion of each of the sensors 115 and 125. In addition, a photodiode or a phototransistor is provided as a light receiving unit in the remaining two windows of each of the sensors 115 and 125.

  Note that the number of light receiving portions of the sensors 115 and 125 is not limited to two. For example, one light receiving unit may be provided for each of the sensors 115 and 125, or three or more light receiving units may be provided. For example, when two light receiving units are provided in each of the sensors 115 and 125, and the respective light receiving units are distinguished as different sensors, they are referred to as sensors 115-1, 115-2, 125-1 and 125-2. To. However, in the present specification, the light source and the light receiving unit for visible light or near infrared light are collectively referred to as sensors 115 and 125.

  Further, light shielding portions 104 and 105 are provided on the upper and lower edges of the substrate 100. Therefore, the sensors 115 and 125 are installed in the space between the light shielding portions 104 and 105 at the upper and lower edges on the back surface of the base material 100. And the light-shielding parts 104 and 105 act also as a buffer material in the part which touches a forehead on the back surface of the head mounting device 10. Although the material of the light-shielding parts 104 and 105 is not limited, a light and soft member is desirable to contact the user's head. The light shielding portions 104 and 105 are, for example, resin such as urethane, rubber, or the like.

  Further, a strain gauge 150 is provided on the back surface of the base material 100 at a position between the light shielding portions 104 and 105 at the upper and lower edges and further between the sensors 115 and 125. That is, the strain gauge 150 is provided on the back side of the position indicated by the dotted line in the front view of FIG. The strain gauge 150 only needs to be able to measure strain due to deflection (bending) of the base material 100 when the head mounting device 10 is mounted on the head. Therefore, the mounting position of the strain gauge 150 is not limited to the position shown in FIGS. For example, the strain gauge 150 may be attached to the surface of the substrate 100.

  Further, on the back surface of the base material 100, wiring for connecting the battery box 102, the sensors 115 and 125, the strain gauge 150, and the substrates in the housings 111 and 121 is laid. However, the portion other than the portion where the sensors 115 and 125 are provided on the back surface of the base material 100 is covered with the cover 106. The cover 106 acts as a shielding plate that prevents the substrate, wiring, etc. from directly touching the user's skin on the back side of the head mounting device 10 that contacts the head side. Therefore, the wiring is laid in the space between the base material 100 and the cover 106.

(Operation example)
In the information processing system, the CPU 21 of the user terminal 20 supports the alignment of the sensors 115 and 125 by the user in accordance with an alignment application program (hereinafter referred to as an alignment application) that is executed in the memory 22. . The process in which the user terminal 20 supports the alignment of the sensors 115 and 125 by the user is also called calibration. By the calibration, the user terminal 20 guides the user so that the sensors 115 and 125 are arranged at a desired position on the user's head. When appropriate calibration is performed, the sensors 115 and 125 detect changes in blood flow and / or hemodynamic changes at a desired position on the user's head.

  However, the desired position of the user's head, which is the calibration target, varies depending on various services, functions, and applications used in this measurement system. For example, the user terminal 20 provides various services or functions using measurement data transmitted from the head-mounted device 10 by executing an application program (hereinafter referred to as a brain application). Therefore, it is desirable to arrange the sensors 115 and 125 at the measurement site for each brain application before executing the brain application.

  FIG. 6 is a diagram illustrating an example of an operation flow of the information processing system. Here, it is assumed that the head mounting device 10 is mounted on the user's head.

  In S <b> 101, the user terminal 20 instructs the control unit 11 of the head mounted device 10 to detect the strain of the head mounted device 10. When the control unit 11 of the head-mounted device 10 receives the instruction, the control unit 11 causes the strain measurement unit 15 to detect strain. The strain measurement unit 15 measures the amount of strain of the head-mounted device 10 (the strain at the portion where the strain gauge 150 is attached) with the strain gauge 150. When the head mounting device 10 is mounted on the user's head, the head mounting device 10 is curved along the shape of the user's head. The degree of bending (deflection) is measured as strain. The greater the deflection, the greater the strain. The strain measurement unit 15 converts the electrical resistance of the strain gauge 150 into an electrical signal and outputs it. The control unit 1 of the head-mounted device 10 converts the electrical signal output from the strain measurement unit 15 into strain measurement data (detection signal) indicating the amount of strain. The control unit 11 of the head-mounted device 10 transmits strain measurement data to the user terminal 20 via the wireless communication unit 13. When the user terminal 20 receives data from the head-mounted device 10 via the wireless communication unit 23, the user terminal 20 stores the received data in the memory 22.

  In S <b> 102, the CPU 21 of the user terminal 20 calculates the head circumference of the user wearing the head-mounted device 10 from the received distortion of the head-mounted device 10. The head circumference is the length around the head. The CPU 21 of the user terminal 20 calculates the head circumference based on the strain from a predetermined relational expression. In addition, the user terminal 20 measures the head of the user whose head circumference is known in advance and the strain when the user wears the head mounting device 10, and the head circumference and strain are measured. The correspondence table may be created, and the head circumference may be obtained from the strain based on the correspondence table. Here, it is assumed that the strain amount increases as the strain gauge 150 contracts. Depending on the position of the strain gauge 150, the relationship between the strain of the head-mounted device 10 and the head circumference can vary.

  FIG. 7 is a diagram illustrating an example of a graph showing the relationship between the strain of the head-mounted device and the head circumference. As shown in the graph of FIG. 7, the greater the strain, the shorter the head circumference. Head circumference decreases monotonically with strain. The shorter the head circumference, the smaller the head size, and the smaller the radius of curvature around the head. The smaller the curvature radius of the head, the more the head mounting device 10 is bent (bends) when the head mounting device 10 is mounted on the head. Therefore, the head circumference becomes shorter as the strain becomes larger. In the example of FIG. 7, the relationship between strain and head circumference is linear, but is not limited to linear.

  The CPU 21 of the user terminal 20 calculates the desired positions of the sensors 115 and 125 of the head mounted device 10 from the calculated head circumference of the user. Desirable positions of the sensors 115 and 125 differ depending on the head circumference of the user. In general, it is desirable that the sensors 115 and 125 be arranged on the outer side as the head circumference of the user increases. The CPU 21 of the user terminal 20 calculates a desired position of the sensors 115 and 125 based on the head circumference from a predetermined relational expression. Desirable positions of the sensors 115 and 125 are represented by, for example, numbers (values) assigned to the scales along the openings 114 and 124. The CPU 21 of the user terminal 20 stores the calculated desired positions of the sensors 115 and 125 in the memory 22. The desired positions of the sensors 115 and 125 are an example of sensor positioning target positions. The relationship between the head circumference and the desired positions of the sensors 115 and 125 may be changed depending on the application executed using the head-mounted device 10 at the user terminal 20.

  FIG. 8 is a diagram illustrating an example of a graph showing the relationship between the user's head circumference and the sensor position (desired position of the sensor). Here, the sensor position corresponds to a number (value) assigned to each scale marked along the opening 114 and the opening 124. It is assumed that the numbers (values) are assigned to the scales cut along the openings 114 and 124 so as to increase from the inside toward the outside. As shown in the graph of FIG. 8, the longer the head circumference, the more outward the sensor position. That is, the interval between the two sensors increases monotonously with respect to the head circumference. The longer the head circumference, the larger the size of the head, so the sensor position is on the outer side. In the example of FIG. 8, the relationship between the head circumference and the sensor position is linear, but is not limited to linear.

  Here, the user terminal 20 may calculate the desired positions of the sensors 115 and 125 directly from the strain using the relationship between the strain and the head circumference and the relationship between the head circumference and the sensor position. Good.

  In S103, the CPU 21 of the user terminal 20 outputs the sensor position calculated in S102 to the display unit 25. The sensor position is represented by a number assigned to the memory. The user or the user's assistant who has confirmed the sensor position output to the display unit 25 adjusts the positions of the sensors 115 and 125 by moving the knobs 112 and 122 according to the output sensor position. Thus, when the user wears the head-mounted device 10, the desired positions of the sensors 115 and 125 of the head-mounted device 10 are calculated and displayed, so that the user can easily position the sensors 115 and 125. Can be moved to a desired position.

(Operation and effect of the embodiment)
The information processing system detects a strain corresponding to the deflection of the head mounted device 10 from the strain measuring unit 15 of the head mounted device 10 mounted on the user. The user terminal 20 calculates the head circumference of the user wearing the head-mounted device 10 based on the detected strain, and calculates the desired positions of the sensors 115 and 125 based on the head circumference. The user terminal 20 displays the calculated desired positions of the sensors 115 and 125 on the display unit 25. A user wearing the head-mounted device 10 or an assistant of the user can adjust the sensor position of the head-mounted device 10 by recognizing a desired position displayed on the display unit 25. By setting the position of the sensor 14 to a desired position according to the head circumference of the user, more accurate measurement can be performed when measuring the brain activity state.

<Computer-readable recording medium>
A program for causing a computer or other machine or device (hereinafter, a computer or the like) to realize any of the above functions can be recorded on a recording medium that can be read by the computer or the like. The function can be provided by causing a computer or the like to read and execute the program of the recording medium.

  Here, a computer-readable recording medium is a recording medium that stores information such as data and programs by electrical, magnetic, optical, mechanical, or chemical action and can be read from a computer or the like. Say. In such a recording medium, elements constituting a computer such as a CPU and a memory may be provided to cause the CPU to execute a program.

  Examples of such a recording medium that can be removed from a computer or the like include a flexible disk, a magneto-optical disk, a CD-ROM, a CD-R / W, a DVD, a DAT, an 8 mm tape, and a memory card.

  In addition, as a recording medium fixed to a computer or the like, there are a hard disk, a ROM (Read Only Memory), and the like.

(Variation 1 of the head mounting device)
The modification 1 of the head mounting apparatus 10 is demonstrated. In the first modification, a foldable head mounting device will be described.

  FIG. 9 is a diagram illustrating a configuration example 1 of the head-mounted device according to the first modification. FIG. 9 is a view of the head mounting device 1-1 of the first modification as viewed from below. Unlike the head mounting device 10 of FIG. 4, the head mounting device 1-1 of Modification 1 cuts the central portion between the two sensors of the head mounting device 10 into two, and the cut center. It is the structure which connected the part by the connection part 170. FIG. The right portion (portion including the sensor 115) of the head mounting device 1-1 and the left portion (portion including the sensor 125) of the head mounting device 1-1 are connected by the connecting portion 170, respectively. The right side portion and the left side portion of the head mounting device 1-1 can be rotated about the connecting portion 170 as a rotation axis. The connection part 170 is comprised with a hinge and an elastic body, for example.

  FIG. 10 is a diagram illustrating a configuration example 2 of the head-mounted device according to the first modification. FIG. 10 shows an example in which the housing 111 and the housing 121 of the head-mounted device 1-1 of FIG. The housing 111 and the housing 121 can be brought close to each other by rotating one portion of the head mounting device 1-1 at the connecting portion 170. Thus, the volume of the head mounting apparatus 1-1 can be made small by changing the shape of the head mounting apparatus 1-1. By reducing the volume, the head mounting device 1-1 can be easily carried. Moreover, the volume can be further reduced by arranging more connecting portions 170.

(Modification 2 of the head mounting device)
The modification 2 of the head mounting apparatus 10 is demonstrated. The head mounting device 1-2 (not shown) of Modification 2 includes a protective cap (helmet) that protects the head from an impact or the like. The helmet includes a dome-shaped shell member that covers an upper portion of the user's head. Helmets include industrial protective caps, motorcycle riding helmets, sports helmets, military helmets, police helmets, and the like. The head mounting device 1-2 is integrated by connecting the edge portion of the dome-shaped shell member of the helmet and the upper end of the head mounting device 10 of FIG.

  By attaching the head mounting device 1-2 to a user who works at a factory or construction site, the brain activity state during work can be measured safely, and the fatigue level of the user during work is monitored. can do. In addition, it is possible to monitor the degree of tension, the duration of tension, and the persistence of tension from the state of brain activity during dangerous work. Furthermore, from the brain activity state during work, it is possible to evaluate the worker's danger potential, individual break timing, worker's work characteristic evaluation, safety evaluation during machine operation, comfort during product use, etc. .

(Modification 3 of the head mounting device)
Modification 3 of the head mounting device 10 will be described. In Modification 3, it is assumed that the head mounting device 10 is used in water. When the user wearing the head-mounted device 10 is underwater, water and air enter between the head-mounted device 10 and the head due to the water flow flowing on the body surface of the user, and the irradiation light is shaken. This affects the light measurement of the head-mounted device 10. Further, when the irradiated light is irradiated from an oblique direction rather than perpendicular to the head surface, the light receiving unit of the sensor may not be able to receive the light due to a difference in refractive index between air and water.

  The head mounting device 1-3 of Modification 3 arranges transparent materials on the light irradiation surfaces of the light sources of the sensors 115 and 125 and the light receiving surface of the light receiving unit of the head mounting device 10 of FIG. Examples of the transparent substance include plastic, acrylic resin, polymethacrylic resin, polycarbonate, and quartz glass. By placing the transparent substance between the light source and the head surface, and between the light receiving unit and the head surface, water can flow between the light source and the head surface and between the light receiving unit and the head surface. The light does not enter, and the light can be prevented from shaking or being refracted between the surface of the head. Thus, the light receiving portions of the sensors 115 and 125 can receive the reflected light from the surface of the head.

1 Head-mounted device
11 Control unit
13 Wireless communication unit
115 sensors
125 sensors
15 Strain measuring section
150 strain gauge
2 User terminals
21 CPU
22 memory
23 Wireless communication unit
24 Public Line Communication Department
25 Display section
26 Operation unit
27 Output section
28 Imaging unit
29 Positioning Department
2A physical sensor

Claims (4)

An optical sensor for measuring at least one of blood flow and hemodynamic changes in the user's head and flexible mounting for holding the optical sensor so as to be positionable on the outer periphery of the user's head Is a program that supports the mounting of the head mounting device including a strain sensor that detects strain according to deflection when the mounting unit is mounted on the user's head,
Obtaining a detection signal of the strain sensor;
Determining a positioning target position of the optical sensor on the mounting portion according to a detection signal of the strain sensor, and assisting the user;
Wearing support program to do that. An optical sensor for measuring at least one of blood flow and hemodynamic changes in the user's head and flexible mounting for holding the optical sensor so as to be positionable on the outer periphery of the user's head A head mounting device that includes a strain sensor that detects a strain corresponding to a deflection when the mounting portion is mounted on the user's head, and a computer,
Obtaining a detection signal of the strain sensor;
Determining a positioning target position of the optical sensor on the mounting portion according to a detection signal of the strain sensor, and assisting the user;
Wearing support method to do that. An optical sensor for measuring at least one of changes in blood flow and hemodynamics of the user's head;
A flexible mounting portion for holding the optical sensor so that the optical sensor can be positioned on the outer periphery of the user's head;
A strain sensor that detects strain according to deflection when the mounting portion is mounted on the user's head; and
Head-mounted device including   The head-mounted device according to claim 3, wherein the strain sensor is used to determine whether the optical sensor is in a desired position with respect to the user.