JP2022037753A - Biological signal measurement device, magnetoencephalography meter, magnetoencephalography meter fitting - Google Patents

Abstract

To stably fix sensors to a living body.SOLUTION: A biological signal measurement device according to an embodiment of the present invention comprises a plurality of sensors for detecting biological signals generated by a living body, a plurality of supporting parts for supporting the plurality of sensors respectively, a fixing part arranged opposite to the living body, and for fixing the supporting parts, a fitting part for fitting the fixing part to the living body, and an acquiring part for acquiring output of the sensors. The fixing part is constituted so as to include a material having flexibility.SELECTED DRAWING: Figure 7

Description

The present invention relates to a biological signal measuring device, a magnetoencephalogram, and a magnetoencephalograph wearing tool.

As a biological signal measuring device for measuring a biological signal such as a magnetic field emitted from a living body, a magnetoencephalography (MEG), a magnetocardiography (MCG), a spinometer (Magnetospinography; MSG) and the like are known.

Further, in order to fix a sensor such as a magnetic sensor used in a biological signal measuring device to a living body, a configuration in which a sensor platform board capable of fixing a plurality of sensors is attached to a balaclava (hood) type support is disclosed. (See, for example, Patent Document 1).

However, with the configuration described in Patent Document 1, the sensor may not be stably fixed to the living body.

An object of the present invention is to stably fix a sensor to a living body.

The biological signal measuring device according to one aspect of the present invention is arranged with a plurality of sensors for detecting biological signals emitted by the living body, a plurality of support portions for supporting each of the plurality of sensors, and facing the living body. The fixing portion has a fixing portion for fixing the support portion, a mounting portion for attaching the fixing portion to the living body, and an acquisition portion for acquiring the output of the sensor, and the fixing portion is made of a flexible material. Is configured to include.

According to the present invention, the sensor can be stably fixed to the living body.

It is a figure of the whole composition example of the magnetoencephalogram which concerns on 1st Embodiment. It is a perspective view of the configuration example of a measuring unit. It is a figure of the structural example of the biological covering part. It is a figure of an example of the structure of the measuring part attached to the head. It is a figure of another example of the structure of the measuring part attached to the head. It is a figure of the structural example of a fixed part, (a) is a top view, (b) is a side view. It is sectional drawing of the structural example around a fixed part. It is sectional drawing around the fixed part when there is an air layer between a living body and a sensor. It is sectional drawing of the 2nd example of the structure around a fixed part. It is a top view of the 2nd example of the structure of a fixed part. It is a top view of the 3rd example of the structure of a fixed part. It is a figure of the 2nd example of the structure of the biological covering part. It is a figure of the 3rd example of the structure of the biological covering part. It is sectional drawing of the structural example of the biological covering part of a two-layer structure. It is a figure of the mounting example of the biomagnetic measuring apparatus which concerns on 2nd Embodiment. It is a figure of the configuration example which the biomagnetic measuring apparatus has a frequency band adjustment part, (a) is fixed to a room temperature magnetic sensor in (a), and (b) is fixed to a support part in (b). Indicates the case.

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In each drawing, the same components are designated by the same reference numerals, and duplicate description will be omitted as appropriate.

Further, the embodiments shown below exemplify a biological signal measuring device for embodying the technical idea of the present invention, and the present invention is not limited to the embodiments shown below. Unless otherwise specified, the shapes of the components, their relative arrangements, the values of the parameters, etc. described below are not intended to limit the scope of the present invention to that alone, but are intended to be exemplified. Is. In addition, the size and positional relationship of the members shown in the drawings may be exaggerated in order to clarify the explanation.

The biological signal measuring device according to the embodiment is arranged with a plurality of sensors for detecting biological signals emitted by the living body, a plurality of support portions for supporting each of the plurality of sensors, and the support portions facing the living body, and fixes the support portions. It has a fixed portion, a mounting portion for attaching the fixed portion to the living body, and an acquisition portion for acquiring the output of the sensor. In the embodiment, by forming the fixing portion including a flexible material, the fixing portion is attached to the living body according to the surface shape of the living body, and the sensor can be stably fixed to the living body.

Hereinafter, an embodiment will be described using a magnetoencephalograph having a biomagnetic measuring device for measuring a magnetic field emitted from the head of a living body as an example.

[First Embodiment]
<Overall configuration example of the magnetoencephalograph 100>
FIG. 1 is a diagram illustrating an example of the overall configuration of the magnetoencephalograph 100 according to the present embodiment. As shown in FIG. 1, the magnetoencephalograph 100 has a magnetic shield room 1, a biomagnetic measuring device 2, and a stereo camera group 3.

Magnetic Shielding Room (MSR) 1 is a room constructed by shielding magnetic field lines with a nickel-iron alloy such as permalloy so that it is not affected by an external magnetic field and does not leak to the outside. It is a kind of equipment.

The biomagnetic measuring device 2 is an example of a biological signal measuring device that measures a magnetic field generated by a living body. Further, the biomagnetic measurement device 2 has a measurement unit 21, a control unit 22, and an acquisition unit 23.

The measuring unit 21 has a plurality of room temperature magnetic sensors that detect a magnetic field generated by the head 201 of the subject (person) 200, which is an example of a living body as a measurement target, and is attached to the head 201 of the subject 200. It is configured to be possible. The measurement by the magnetoencephalograph 100 is performed in a state where the subject 200 enters the magnetic shield room 1 and the measuring unit 21 is attached to the head 201.

The cable 210, one end of which is connected to the room temperature magnetic sensor of the measurement unit 21, is pulled out of the magnetic shield room 1 through a wiring port provided in the magnetic shield room 1 in a bundled state, and the other end is the control unit 22. Connected to. The measurement unit 21 can output the magnetic field detection data by the room temperature magnetic sensor to the control unit 22 via the cable 210.

The control unit 22 is a control device that controls the operation of the measurement unit 21. The functions of the control unit 22 are realized by an electric circuit, and some of these functions can also be realized by software (CPU; Central Processing Unit). These functions may be realized by a plurality of circuits or a plurality of software. Further, the control unit 22 is configured to be able to record the detection data of the magnetic field output by the measurement unit 21 by a storage device such as an HDD (Hard Disk Drive).

The acquisition unit 23 acquires the output of the sensor. Further, the acquisition unit 23 outputs the measured value of the brain magnetic field acquired based on the magnetic field detection data recorded in the control unit 22. The acquisition unit 23 is constructed by a computer and can operate the magnetoencephalograph 100, display the measured value of the brain magnetic field, transmit to an external device, and the like. The display of the measured value and the transmission to the external device are examples of the output of the measured value.

The stereo camera group 3 has a function of detecting the position and / or the posture of the measuring unit 21 attached to the head 201 of the subject 200 with respect to the head 201. The stereo camera group 3 has two stereo cameras 31 and a stereo camera 32, and can detect the position and / or the posture of the measurement unit 21 from two directions and output the position and / or the posture to the acquisition unit 23. Based on the position and / or orientation of the measurement unit 21 detected by the stereo camera group 3 and the known arrangement information of the plurality of room temperature magnetic sensors, the position information of each of the plurality of room temperature magnetic sensors included in the measurement unit 21. Is obtained and used for estimation of the magnetic field generation source in the living body (signal source estimation). The stereo camera group 3 may include three or more stereo cameras.

<Configuration example of measurement unit 21>
Next, the configuration of the measuring unit 21 will be described with reference to FIG. FIG. 2 is a perspective view showing an example of the configuration of the measuring unit 21. As shown in FIG. 2, the measurement unit 21 has a plurality of room temperature magnetic sensors 211, a plurality of support units 212, and a biological coating unit 213.

The plurality of room temperature magnetic sensors 211 are examples of a plurality of sensors that detect biological signals emitted by a living body, and each of them can detect a magnetic field emitted by a living body. The room temperature magnetic sensor 211 is composed of a magnetic impedance (MI) sensor, a magnetoresistance (MR) sensor, an optical pumping atomic magnetometer (OPM), and the like.

The magnetic impedance sensor is a sensor that detects the magnitude of a magnetic field by utilizing the pulsed energization magnetic impedance effect. The magnetoresistive effect sensor is a sensor that detects the magnitude of a magnetic field by utilizing the magnetoresistive effect in which the electrical resistance of a solid changes depending on the magnetic field. An optical pumping magnetic sensor is a sensor that detects the magnitude of a magnetic field by using optical pumping, which is an operation of exciting an atom or an electron in a molecule from a low energy level to a high energy level using light.

The magnetic impedance sensor, the magnetoresistive effect sensor, and the optical pumping magnetic sensor can each operate at room temperature. It is called a room temperature magnetic sensor as opposed to a SQUID (superconducting quantum interference device) sensor that requires an extremely low temperature environment such as liquid helium.

The room temperature magnetic sensor 211 has a prismatic shape having a side size of several mm to several cm in a cross section. However, the shape may be another shape such as a columnar shape. In the case of a cylinder, a cylinder having a cross-sectional diameter of several mm to several cm can be used. In the magnetoencephalograph according to the present embodiment, 112 or more normal temperature magnetic sensors 211 can be arranged when the size of one side of the prismatic normal temperature magnetic sensor 211 is 20 mm or less.

The plurality of support portions 212 can support each of the plurality of room temperature magnetic sensors 211 in a state of being fixed to the fixed portion described later with reference to FIG. It is sufficient that at least a part of the plurality of support portions 212 appropriately supports the normal temperature magnetic sensor 211, and the support portion 212 that does not support the normal temperature magnetic sensor 211 may be included in the measurement unit 21.

The plurality of support portions 212 are configured to include a tubular member each having a hollow portion 212a, and a long hole 212b, which is a through hole, is formed on a side portion of the tubular member. The support portion 212 inserts at least a part of the normal temperature magnetic sensor 211 into the hollow portion 212a, and the tip portion of the screw 212c presses the side surface of the normal temperature magnetic sensor 211 via the elongated hole 212b to press the normal temperature magnetic sensor 211. Fix and support. The support portion 212 is configured so that the support position of the room temperature magnetic sensor 211 can be changed in the axial direction of the tubular member.

Further, the support portion 212 is made of a rigid material. Specifically, a metal, a resin, or the like is used as the material of the support portion 212, and the support portion 212 is manufactured by, for example, a 3D printer or a cutting process.

The biological covering portion 213 is a component that covers a part of the living body such as the head of the subject and a part of the fixing portion for fixing the plurality of supporting portions 212, and is for attaching the fixing portion to the living body. Functions as a mounting part for. Further, the biological covering portion 213 corresponds to an example of a magnetoencephalograph wearing tool.

<Structure example of bio-covered portion 213>
Next, the configuration of the biological covering portion 213 will be described with reference to FIG. FIG. 3 is a diagram showing an example of the configuration of the biological covering portion 213.

As shown in FIG. 3, the biological covering portion 213 is a swimming cap-shaped member, and is configured to include a material having flexibility and elasticity. As the material constituting the biological coating portion 213, for example, a chemical fiber, a cloth, a rubber-based material, a chloroprene rubber sponge used in a wet suit, or the like can be used.

The biological covering portion 213 has a plurality of through holes 213a and a jaw stop portion 213b. The plurality of through holes 213a are portions for inserting a plurality of support portions that support the plurality of room temperature magnetic sensors. With the plurality of support portions supporting the plurality of room temperature magnetic sensors protruding through the plurality of through holes 213a, the subject can attach the bio-covered portion 213 to the head so as to wear a swimming cap. Further, the portion other than the through hole 213a in the biological covering portion 213 presses the fixing portion for fixing the support portion, so that the tip portion of the room temperature magnetic sensor supported by the support portion is designated on the surface of the subject's head. It is fixed in a state close to the distance.

The chin rest portion 213b is a belt-shaped portion that extends from one ear and the buccal side of the subject to which the biological covering portion 213 is attached to the head, and is a belt-shaped portion that extends when the belt is wrapped around the chin. Is formed to reach the opposite ear and cheek. Further, a hook-and-loop fastener 213c is provided at the tip of the belt in the jaw stop 213b and at the portion of the biological covering portion 213 where the tip of the belt reaches when the belt is wound around the jaw.

By connecting the hook-and-loop fasteners 213c while wrapped around the subject's chin, the biological coating portion 213 can be more stably attached to the subject's head so that the biological coating portion 213 does not come off. ..

Here, FIG. 4 shows an example of the configuration of the measurement unit 21 attached to the head 201 of the subject via the biological coating unit 213. A plurality of support portions 212 project through the through holes of the biocoating portion 213. Further, the belt-shaped portion of the jaw stop portion 213b is wrapped around the jaw in the head 201, and the measuring portion 21 is attached to the head 201 of the subject.

Since the bio-covering portion 213 has flexibility and elasticity, the wearability of the bio-covering portion 213 is improved. Further, the biological coating portion 213 presses the fixing portion for fixing the support portion that supports the normal temperature magnetic sensor, so that the position shift of the normal temperature magnetic sensor with respect to the head is less likely to occur.

In addition to the hook-and-loop fastener, a button, a hook, or the like may be used to connect the jaw stop portion 213b. Further, in order to fix the biological covering portion 213, in addition to the belt-shaped jaw stop portion 213b, as shown in FIG. 5, the biological covering portion 213 has a balaclava shape that covers the entire circumference of the subject's jaw and mouth. Can also be configured.

<Structure example of fixed portion 214>
Next, the configuration of the fixed portion 214 will be described with reference to FIG. 6A and 6B are views for explaining an example of the configuration of the fixed portion 214, where FIG. 6A is a top view and FIG. 6B is a side view. Further, FIG. 6A shows a fixed portion 214 in a flatly extended state, and FIG. 6B shows a fixed portion 214 in a bent state. In FIG. 6A, the axial direction of the support portion 212, which is a tubular member, is the Z-axis direction, the predetermined direction in the plane orthogonal to the Z-axis is the X-axis direction, and the X-axis direction in the plane. The direction orthogonal to is the Y-axis direction.

As shown in FIG. 6A, the fixing portion 214 is a band-shaped member, and a plurality of supporting portions 212 are arranged on the surface on the positive direction side of the Z axis. The plurality of support portions 212 are arranged in a staggered manner at substantially constant intervals with an interval dx in the X-axis direction and an interval dy in the Y-axis direction. The intervals dx and dy can be appropriately determined.

The room temperature magnetic sensor may have a coil inside to cancel the magnetic field, but the crosstalk phenomenon in which the magnetic field generated by the coil reaches the adjacent room temperature magnetic sensor affects the detection of the magnetic field by the room temperature magnetic sensor. You may receive it. By arranging the plurality of support portions 212 in a staggered pattern, the distance between the normal temperature magnetic sensors supported by the support portions 212 can be widened as compared with the grid-like arrangement, and the magnetism between the adjacent normal temperature magnetic sensors can be increased. It is possible to suppress the crosstalk of. It is preferable that the intervals dx and dy are appropriately determined so that a sufficient distance between adjacent room temperature magnetic sensors can be secured. For example, the intervals dx and dy can both be set to about 3 cm.

The fixing portion 214 is configured to include a material having flexibility and having almost no elasticity. As a material constituting the fixing portion 214, synthetic leather or rubber having almost no elasticity can be used. The support portion 212 can be fixed to the fixing portion 214 by adhesion, sewing, sandwiching, or the like.

Through holes are formed in the portions of the fixing portion 214 where the plurality of supporting portions 212 are fixed. When the fixing portion 214 is attached to the head of the subject using the biological covering portion, the tips of the plurality of room temperature magnetic sensors supported by the plurality of supporting portions 212 face each other with respect to the surface of the head. It is configured to be in close proximity.

Here, as shown in FIG. 6B, when the fixed portion 214 is bent, the position and posture of the support portion 212 also change with the bending of the fixed portion 214. When the fixed portion 214 is attached to the subject via the biological covering portion, the approximate bending radius r according to the shape of the attached portion of the fixed portion 214 such as the head and the axis of the cylinder of the adjacent support portion 212 are provided. The angle θ between them can be specified. Therefore, even when the position and posture of the support portion 212 change due to the bending of the fixed portion 214, the approximate position of the support portion 212 can be specified based on the bending radius r and the angle θ.

Next, FIG. 7 is a cross-sectional view showing an example of the configuration around the fixed portion 214. As shown in FIG. 7, the fixing portion 214 is arranged so as to face the surface of the head 201 of the subject 200, and the support portion 212 is a surface 214b opposite to the surface 214a facing the surface of the head 201. Is fixed. However, the fixing portion 214 may also fix the support portion 212 at a portion other than the surface 214b.

The support portion 212 is inserted into a through hole formed in the biological coating portion 213. The support portion 212 supports the normal temperature magnetic sensor 211 by inserting the normal temperature magnetic sensor 211 into the hollow portion 212a and pressing the support portion 212 with the tip of the screw 212c.

The normal temperature magnetic sensor 211 has a tip end close to and facing the surface of the head 201 through a through hole provided in the hollow portion 212a of the support portion 212 and the fixed portion 214. The normal temperature magnetic sensor 211 detects the magnetic field of the head 201 in this state, and outputs the detection data via the cable 210.

The flexible and elastic biocoating portion 213 presses the fixing portion 214 to stably fix the fixing portion 214 to the head 201, and the position and / or position of the room temperature magnetic sensor 211 with respect to the head 201. It is possible to ensure the stability of the posture.

The room temperature magnetic sensor 211 can move in the axial direction (Z-axis direction) of the support portion 212 in the hollow portion 212a of the support portion 212. There are some irregularities on the surface of the living body, but by moving the room temperature magnetic sensor 211 in the Z-axis direction, the tip of the room temperature magnetic sensor 211 can be brought closer and fixed according to the irregularities on the surface of the living body. .. Further, when the subject feels hot due to the heat generated by the normal temperature magnetic sensor 211, the normal temperature magnetic sensor 211 can be moved away from the surface.

FIG. 8 shows a state in which the room temperature magnetic sensor 211 is moved away from the surface (Z-axis positive direction) from the state of FIG. 7 and fixed by the screw 212c. Due to the movement of the room temperature magnetic sensor 211, a gap 201a is formed between the surface of the head 201 and the tip of the room temperature magnetic sensor 211. The heat transfer to the subject can be suppressed by the heat insulating action of the gap 201a. Since the support portion 212 is made of a rigid material, such stable support of the room temperature magnetic sensor 211 is possible.

FIG. 9 is a diagram illustrating a second example of the configuration around the fixed portion. Compared with the configurations of FIGS. 7 and 8, the length (height) of the room temperature magnetic sensor 211 and the support portion 212 in the Z-axis direction is shorter. Even with such a configuration, the room temperature magnetic sensor 211 can be supported and fixed in close proximity to the surface of the head 201.

Here, FIG. 6 illustrates the configuration of the fixing portion 214 for fixing the supporting portions 212 for two rows arranged along the X direction, but the present invention is not limited to this. FIG. 10 is a diagram illustrating a second example of the configuration of the fixed portion. The fixing portion 215 has three fixing portions 215a, 215b, and 215c capable of fixing two rows of support portions arranged along the X direction. The fixing portions 215a, 215b, and 215c are juxtaposed in the Y direction and are connected at a variable angle via the joint member 216 to form the fixing portion 215. For example, a hinge or the like can be used for the joint member 216.

With this configuration, the fixing portions 215a, 215b, 215c can be imitated by utilizing the flexibility of the fixing portions 215a, 215b, 215c with respect to the shape of the head in the X direction. Further, by changing the angles of the fixed portions 215a, 215b, and 215c in the Y direction with respect to the shape of the head in the Y direction, the fixed portions 215a, 215b, and 215c can be imitated. In this case, through holes are also formed in the biological coating portion so as to match the arrangement and number of through holes provided in the fixing portion 215.

FIG. 11 is a diagram illustrating a third example of the configuration of the fixed portion. The fixing portion 217 has five fixing portions 217a, 217b, 217c, 217d, 217e capable of fixing one row of support portions arranged along the Y direction. The fixed portions 217a, 217b, 217c, 217d, and 217e are juxtaposed in the X direction and connected via a joint member 218 so that the angle can be changed to form the fixed portion 217. For example, a hinge or the like can be used for the joint member 218.

With this configuration, the flexibility of the fixing portions 217a, 217b, 217c, 217d, 217e is used to imitate the fixing portions 217a, 217b, 217c, 217d, 217e with respect to the shape of the head in the Y direction. be able to. Further, by changing the angles of the fixed portions 217a, 217b, 217c, 217d, and 217e in the X direction with respect to the shape of the head in the X direction, the fixed portions 217a, 217b, 217c, 217d, and 217e are imitated. Can be done.

<Deformation example of biological coating>
The configuration of the biological coating can also be modified in various ways. FIG. 12 is a diagram showing a second example of the configuration of the biological coating portion, and FIG. 13 is a diagram showing a third example of the configuration of the biological coating portion.

The number of through holes provided in the bio-covered portion for inserting the support portion may be smaller than the number of the support portions. When the biological part for detecting the magnetic field is limited and the room temperature magnetic sensor is intensively arranged in the biological part, the number of holes in the biological covering portion may be small. The biological covering portion 219 shown in FIG. 12 is provided with one through hole 219a, and the biological covering portion 220 shown in FIG. 13 is provided with two through holes 220a and 220b.

Further, FIG. 14 is a diagram showing an example of the configuration of the biological coating portion 221 having a two-layer structure. As shown in FIG. 14, the bio-covering portion 221 has an inner bio-covering portion 221a and an outer bio-covering portion 221b. The inner bio-covering portion 221a is an example of a first bio-covering portion provided on the side facing the surface of the head 201 of the subject 200. The outer bio-covering portion 221b is an example of a second bio-covering portion provided on the opposite side of the inner bio-covering portion 221a with the fixing portion 214 interposed therebetween.

The fixing portion 214 is arranged between the inner bio-covering portion 221a and the outer bio-covering portion 221b, and is configured to face the head 201 of the subject 200 via the inner bio-covering portion 221a. The room temperature magnetic sensor 211 is arranged so that the tip portion faces the head 201 of the subject 200 via the inner biological coating portion 221a, and detects the magnetic field of the head 201.

Here, since the fixed portion 214 and the room temperature magnetic sensor 211 each have rigidity and may generate heat, the subject may feel uncomfortable due to pain, heat, or the like when they come into direct contact with the living body. By having the fixing portion 214 and the room temperature magnetic sensor 211 facing the head 201 via the inner biological covering portion 221a, the above-mentioned discomfort can be eliminated.

<Action and effect of biomagnetic measuring device 2>
Next, the action and effect of the biomagnetic measuring device 2 will be described.
Conventionally, a magnetoencephalograph, a magnetocardiography, a spinal cord, and the like are known as a biological signal measuring device such as a biomagnetic measuring device. A highly sensitive SQUID sensor is often used as the magnetic sensor used in the biomagnetic measuring device. However, since the SQUID sensor operates in an extremely low temperature environment, liquid helium for cooling is required. Liquid helium is said to be a depleted resource, and in addition to its high cost, it requires auxiliary equipment such as a dewar and a refrigerator, which makes the equipment costly as a whole.

Further, since the SQUID sensor is arranged in the dewar for liquid helium, there are restrictions on the arrangement, and the distance (working distance) between the measurement target and the SQUID sensor may be long. The longer the working distance, the lower the magnetic field detection sensitivity and the lower the measurement accuracy.

On the other hand, the normal temperature magnetic sensor that can operate in a normal temperature environment has the advantages of low cost because it does not use liquid helium and that the working distance can be shortened.

In order to fix a biomagnetic measuring device using such a room temperature magnetic sensor to a living body, a sensor platform board capable of fixing a plurality of room temperature magnetic sensors is attached to a cap (head width) type support. It has been disclosed. However, in this configuration, the room temperature magnetic sensor may not be stably fixed to the living body.

The biomagnetic measuring device according to the present embodiment is arranged with a plurality of sensors for detecting biological signals emitted by a living body, a plurality of support portions for supporting each of the plurality of sensors, and a support portion fixed to the living body. It has a fixing portion to be attached, a mounting portion for attaching the fixing portion to the living body, and an acquisition portion for acquiring the output of the sensor, and the fixing portion includes a flexible material.

With this configuration, the fixed part can be stably attached to the living body according to the surface shape of the living body, and the position and posture of the normal temperature magnetic sensor supported by the support part to which the fixed part is fixed are suppressed. can. And the room temperature magnetic sensor can be stably fixed to the living body. Further, by making the fixed portion imitate the surface shape of the living body, the tip portion of the room temperature magnetic sensor can be brought closer to the living body (the working distance is narrowed), and a weak signal can be detected more sensitively. As a result, the measurement accuracy of the magnetic field can be improved.

Further, in the present embodiment, the bio-covered portion included in the mounting portion is configured to include a flexible and stretchable material, and the bio-covered portion includes a part of the living body and a part of the fixed portion. Cover each. As a result, the normal temperature magnetic sensor can be attached to the living body by pressing the fixed portion against the living body by the biological covering portion, and the normal temperature magnetic sensor can be stably fixed to the living body.

Further, in the present embodiment, the support portion is configured to include a tubular member, and at least a part of the room temperature magnetic sensor is inserted inside the tubular member to support the room temperature magnetic sensor. As a result, even a room temperature magnetic sensor having a shape that is difficult to shake and stabilize, such as a columnar shape, can be stably fixed to the living body.

Further, in the present embodiment, the biological covering portion has a through hole through which the support portion is inserted, and in a state where the support portion is inserted through the through hole, the biological covering portion covers a part of the living body and a part of the fixed portion, respectively. .. As a result, the fixed portion for fixing the support portion can be pressed against the living body, and the room temperature magnetic sensor can be stably fixed to the living body.

Further, in the present embodiment, the fixing portion fixes a plurality of supporting portions arranged in a staggered pattern. As a result, the distance between the room temperature magnetic sensors supported by the support portion can be widened as compared with the grid-like arrangement, and magnetic crosstalk between adjacent room temperature magnetic sensors can be suppressed.

Further, the support portion fixed to the fixed portion and the room temperature magnetic sensor supported by the support portion have rigidity and may generate heat, so that the subject as a living body may feel uncomfortable. In the present embodiment, as shown in the above-mentioned modified example (see FIG. 14), the first biological coating portion and the second biological coating portion are provided, and the fixing portion is the first biological coating portion. The bio-covering portion is arranged between the second bio-covering portion and faces the living body via the second bio-covering portion. This prevents the support portion and the room temperature magnetic sensor from coming into direct contact with the subject, and can eliminate the discomfort of the subject.

[Second Embodiment]
Next, the biomagnetic measuring device 2a according to the second embodiment will be described. The same components as those described in the first embodiment will be given the same part numbers, and duplicated explanations will be omitted as appropriate.

In the first embodiment, the biomagnetic measuring device fixed to the head of the subject has been described, but in the present embodiment, the biomagnetic measuring device 2a is fixed to the waist of the subject.

FIG. 15 is a diagram illustrating an example of the configuration around the fixed portion 222 in the biomagnetic measuring device 2a. The biomagnetic measuring device 2a has a fixing portion 222. The fixing portion 222 fixes the supporting portion 212 that supports the room temperature magnetic sensor 211. Further, the fixing portion 222 is partially covered with the biological covering portion 213 and is fixed so as to be pressed against the waist portion 202 of the subject.

Since the waist portion 202 has more irregularities than the head and the like, the fixing portion 222 is configured to have a different thickness according to the irregularities on the surface of the waist portion 202. In the example of FIG. 15, the thick portion 222a, which is a part of the fixing portion 222, is a portion whose thickness is increased according to the unevenness of the waist portion 202.

By making the thickness of the fixing portion 222 different according to the unevenness of the surface of the living body in this way, the fixing portion can be attached to the living body more stably according to the surface shape of the living body. Then, it is possible to suppress the deviation of the position and posture of the normal temperature magnetic sensor to which the fixing portion is fixed with respect to the living body, and to stably fix the normal temperature magnetic sensor to the living body. The other actions and effects are the same as those described in the first embodiment.

[Other preferred embodiments]
Although examples of embodiments of the present invention have been described above, the present invention is not limited to such specific embodiments, and various aspects are described within the scope of the gist of the present invention described in the claims. It can be transformed and changed.

For example, the biomagnetic measuring device 2b can be configured by including a room temperature magnetic sensor including a frequency band adjusting unit. FIG. 16 is a diagram illustrating an example of a configuration in which the biomagnetic measuring device 2b has a frequency band adjusting unit 223, and FIG. 16A shows a case where the frequency band adjusting unit 223 is fixed to the room temperature magnetic sensor 211. Indicates a case where the frequency band adjusting unit 223 is fixed to the support unit 212.

The frequency band adjusting unit 223 is configured to include, for example, a coil, and can adjust the frequency of the signal detected by the room temperature magnetic sensor 211.

In FIG. 16A, the support unit 212 supports the room temperature magnetic sensor 211 to which the frequency band adjustment unit 223 is fixed. In FIG. 16B, the frequency band adjusting unit 223 is fixed to the support unit 212 that supports the room temperature magnetic sensor 211. When the frequency band adjusting unit 223 is fixed to the support unit 212, the frequency band adjusting unit 223 can be detachably configured.

It should be noted that the numbers such as the ordinal number and the quantity used in the description of the embodiment are all exemplified for concretely explaining the technique of the present invention, and the present invention is not limited to the exemplified numbers. Further, the connection relationship between the components is exemplified for concretely explaining the technique of the present invention, and the connection relationship for realizing the function of the present invention is not limited to this.

1 Magnetic shield room 2 Biomagnetic measuring device (an example of biological signal measuring device)
21 Measuring unit 210 Cable 211 Room temperature magnetic sensor (example of sensor)
212 Support part 212a Hollow part 212b Long hole 212c Screw 213 Bio-covered part (example of mounting part)
213a Through hole 213b Jaw stop 213c Hook-and-loop fastener 214 Fixing part 22 Control part 23 Acquisition part (data recording part / data analysis part)
3 Stereo camera group 100 Magnetoencephalogram 200 Subject 201 Head 221a Inner bio-covered part (an example of the first bio-covered part)
221b outer bio-covering part (an example of the second bio-covering part)
223 Frequency band adjustment unit dx, dy interval

Japanese Unexamined Patent Publication No. 2012-95939

Claims (11)

Multiple sensors that detect biological signals emitted by living organisms,
A plurality of support portions that support each of the plurality of sensors, and
A fixed portion that is arranged facing the living body and fixes the support portion,
An attachment part for attaching the fixing part to the living body,
It has an acquisition unit that acquires the output of the sensor, and
The fixing portion is a biological signal measuring device including a flexible material. The biological signal measuring device according to claim 1, wherein the mounting portion includes a material having flexibility and elasticity. The biological signal measuring device according to claim 1 or 2, wherein the attachment portion includes a biological coating portion that covers a part of the living body and a part of the fixing portion, respectively. The biological signal is a signal indicating a magnetic field generated by the biological body.
The biological signal measuring device according to any one of claims 1 to 3, wherein the sensor is a room temperature magnetic sensor that detects the magnetic field generated by the living body. The biological signal measuring device according to any one of claims 1 to 4, wherein the sensor has a columnar shape. The biological body according to any one of claims 1 to 5, wherein the support portion includes a tubular member, and at least a part of the sensor is inserted inside the tubular member to support the sensor. Signal measuring device. The attachment portion includes a biological coating portion that covers a part of the living body and a part of the fixing portion, respectively.
The biological covering portion has a through hole through which the support portion is inserted, and in a state where the support portion is inserted through the through hole, the biological covering portion covers a part of the living body and a part of the fixing portion, respectively. do
The biological signal measuring device according to any one of claims 1 to 6. The biological signal measuring device according to any one of claims 1 to 7, wherein the fixing portion fixes the plurality of supporting portions arranged in a staggered pattern. The attachment portion includes a biological coating portion that covers a part of the living body and a part of the fixing portion, respectively.
The bio-covering portion has a first bio-covering portion and a second bio-covering portion.
Any one of claims 1 to 8 in which the fixing portion is arranged between the first biomedical coating portion and the second biomedical coating portion and faces the living body via the first biomedical coating portion. The biological signal measuring device according to item 1. A magnetoencephalograph having the biological signal measuring device according to any one of claims 1 to 9. It is a magnetoencephalogram mounting tool for mounting the magnetoencephalogram on the living body.
Multiple supports that support each of the multiple sensors,
A fixed portion that is arranged facing the living body and fixes the support portion,
It has a mounting portion for attaching the fixing portion to the living body, and has.
The fixing portion is configured to include a flexible material.
The attachment portion includes a biological coating portion that covers a part of the living body and a part of the support portion, respectively, and is composed of a material having flexibility and elasticity. ..

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