JP2007000251A - Biosignal detecting device and sleep device having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a conventional biosignal detecting device has a large and bulky constitution, requires a time and a labor for its installation and moving, and has difficulty in its storage. <P>SOLUTION: This biosignal detecting device is provided with a cable-shaped piezoelectric sensor 1 having flexibility, a plurality of rod-shaped members 9 orthogonally superposed on the piezoelectric sensor 1, and a flexible film member 8, and is so constituted that the piezoelectric sensor 8 and the rod-shaped member 9 are integrally disposed on the film member. This biosignal detecting device 10 can thus bent orthogonally to the rod-shaped member 9 so as to be carried, for example, by winding it or folding it and installed in an intended place. This device can be stored by winding or folding it. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a biological signal detection apparatus that is installed in bedding such as a bed and detects a signal such as a heartbeat.

  Conventionally, this type of biological signal detection device is installed on a product that is subjected to a biological load, such as bedding or a chair, and has a structure in which a biological signal detection means and an uneven member are combined in order to improve detection sensitivity. . (For example, see Patent Document 1 and Patent Document 2).

  FIG. 15 is a configuration diagram of a conventional biological signal detection device described in Patent Document 1. FIG. 16 is a cross-sectional view of a main part of the biological signal detection device described in the document. In FIG. 15, the pressure-sensitive means 1 is installed on the hard member 2, and the hard member 2 is installed on the hard member 3 having holes 3a to 3d (corresponding to a plurality of rods of the present invention). Installed between the floor board 4 and the mattress 5. Due to the vibration from the living body sleeping on the bed, a large signal is obtained because a large bending deformation is applied to the pressure-sensitive means 1 at the edge of the hole in FIG.

FIG. 17 is a configuration diagram of a detection unit of another conventional biological signal detection device described in Patent Document 2. In FIG. 17, a conventional biological signal detection apparatus sandwiches an optical fiber 6 (corresponding to pressure-sensitive means of the present invention) for detecting signals between concavo-convex members 7a and 7b (corresponding to a plurality of bars of the present invention), When this vibration is applied, the optical fiber 6 is largely bent to obtain a large signal.
JP 2005-13259 A JP-A-8-584

  However, in the conventional configuration, the hard member 2 has the same size as the bedding and is bulky, so it takes time to install and move, and the hard member 2 and the concavo-convex members 7a and 7b are hard, so they are stored small. There was a problem that it was difficult to do.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a biological signal detection device having good installation property and storage property.

  In order to solve the above-described conventional problems, a biological signal detection apparatus according to the present invention includes a flexible pressure-sensitive means, a plurality of rod-shaped members that overlap the pressure-sensitive means and intersect the pressure-sensitive means, and a flexible A film member is provided, and the pressure-sensitive means and the rod-shaped member are integrally disposed on the film member. As a result, since the flexible detection means and each of the plurality of separated rod-shaped members are installed on the flexible film member, the biological signal detection device can be bent in a direction perpendicular to the rod-shaped member. For example, take it up or down and carry it around and place it where you want it. Further, it can be stored by being wound or folded.

  The biological signal detection device of the present invention can be wound or folded, and can provide a product with good installation and storage.

  According to a first aspect of the present invention, there is provided a pressure-sensitive means having flexibility for detecting a pressure fluctuation generated by a living body, a plurality of rod-shaped members that overlap the pressure-sensitive means and intersect the pressure-sensitive means, and a flexible film member. In addition, by arranging the pressure-sensitive means and the rod-shaped member integrally with the film member, the biological signal detection device can be bent in a direction perpendicular to the rod-shaped member, so that it can be wound or folded. It can be carried, installed and stored in a desired place, and a biosignal detection device with good installation property and storage property can be provided.

  In the second invention, in particular in the first invention, the pressure-sensitive means is on the living body side. In the film member, the pressure-sensitive means is arranged on the living body side, and the rod-shaped member is arranged on the opposite side, so that vibration from the human body is easily transmitted, and the pressure-sensitive means when reaching the biological signal detection device. Since a large signal output is generated by applying a bending action along the cross-sectional shape of the rod-shaped member, a biological signal can be detected with high sensitivity.

  The third invention has an elastic member, and is arranged integrally with the film member so that the pressure-sensitive means is sandwiched between the rod-shaped member and the elastic member. And since the biological signal detection device can be bent in a direction perpendicular to the rod-shaped member, it can be taken up and folded down, and can be installed and stored in a desired place. A signal detection device can be provided. Moreover, even if the top and bottom (up and down) are reversed, that is, when the living body side and the opposite side are reversed, the pressure sensitive means is bent along the cross-sectional shape of the rod-like member and a large signal output is generated. Biological signals can be detected. Therefore, it is possible to provide an easy-to-use biological signal detection device that does not need to consider the front and back sides.

  In a fourth aspect of the invention, particularly in the third aspect of the invention, the elastic member has a plurality of elastic members, and is arranged integrally with the film member so as to sandwich the pressure-sensitive means between the rod-like member and the elastic member. Since the pressure-sensitive means has flexibility and a plurality of rod-shaped elastic members are separated, the biological signal detection device is arranged in a direction perpendicular to the elastic members and the rod-shaped members. It becomes easy to bend and round, and installation and storage are improved.

  According to a fifth aspect of the present invention, the second plurality of rod-shaped members are sandwiched between the pressure-sensitive means, and the plurality of rod-shaped members and the second plurality of rod-shaped members are arranged so as not to overlap each other. And since it can be bent in a direction perpendicular to the rod-shaped member and the second rod-shaped member, it can be taken up and folded, and can be installed and stored in a desired place. A good biological signal detection device can be provided. In addition, it is possible to provide an easy-to-use biological signal detection device that does not need to consider the front and back sides.

  In a sixth aspect of the present invention, in any one of the first to fifth aspects, the arrangement direction of the rod-shaped members is set to be a direction parallel to or perpendicular to the height direction of the living body. As a result, when it is orthogonal to the height direction, it can be folded and bent like a normal bedding, and when it is parallel to the height direction, it can be folded or bent in this direction, improving installation and storage. .

  According to a seventh aspect of the present invention, in the invention described in any one of the first to fifth aspects, the pressure-sensitive means includes an inner electrode, a pressure-sensitive member provided around the inner electrode, and the pressure-sensitive member. The outer electrode provided around was provided and configured in a cable shape. The external electrode serves as a shield with respect to the central electrode that transmits the detected biological signal, and is not easily affected by external electromagnetic noise. Therefore, a highly reliable biological signal detection apparatus is provided that is less likely to cause noise superimposition even when electronic devices are used nearby for the collection and processing of biological signals, or when communication devices such as mobile phones are used nearby. can do.

An eighth invention includes a flexible member disposed under a living body, a structure that supports the flexible member, and the biological signal detection device according to any one of the first to seventh inventions, wherein the biological detection device includes: The flexible member and the structure are arranged. As a result, it is configured to transmit vibration by indirect contact with the living body via the flexible member, and for the living body, while maintaining a comfort without affecting the sleeping posture and the sleeping content even with a biological signal detection device, The signal can be reliably detected by being installed on the structure.

  The ninth invention is characterized in that, in the eighth invention, the installation length of the pressure-sensitive means is larger than the length of the side of the flexible member. Thereby, in the side length of the flexible member, there is no undetectable region, and unnecessary portions can be installed so as not to detect noise by folding inside the structure, etc. can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1A is a configuration diagram of the front surface of the biological signal detection device, and FIG. 1B is a configuration diagram of the back surface of the biological signal detection device. FIG. 2 is a configuration diagram of the bed (sleeping apparatus) in which the biological signal detection device according to the first embodiment of the present invention is installed. 3 is a cross-sectional view of the pressure-sensitive means 1, and FIG. 5 is a block diagram of the biological signal detection device.

  In FIG. 1 (a), a flexible cable-like piezoelectric sensor 1 as a pressure-sensitive means is meandered and sewn on the surface of a flexible film-like member such as a cloth 8. FIG. 1 (b) In FIG. 2, aluminum round bars 9 as a plurality of hard rod-like members are sewn in parallel to each other at substantially equal intervals on the back side of the cloth 8 to form a biological signal detection device 10. By arranging as in this example, the rod-shaped member 9 and the straight portion of the meandering portion of the piezoelectric sensor 1 intersect at a plurality of points at an angle of about 90 degrees. That is, when the living body goes to sleep, the aluminum round bar 9 is arranged in a direction orthogonal to the height direction of the living body. A control unit 11 that processes an output signal from the piezoelectric sensor 1 is connected to one end of the piezoelectric sensor 1.

  In FIG. 2, the biological signal detection device 10 is arranged on the floor plate 4 of the bed with the surface on which the piezoelectric sensor 1 is sewed as the upper surface, the mattress 5 is disposed thereon, and the human body 12 that is a living body is sleeping on the mattress 5. is doing. At this time, vibration from the human body 12 is transmitted through the mattress 5 and reaches the biological signal detection device 10. At that time, the piezoelectric sensor 1 is subjected to a bending action along the cross-sectional shape of the aluminum round bar 9 to generate a large signal output. . In the experiment, a satisfactory result could be obtained by using a piezoelectric sensor having a diameter of about 2.5 mm and arranging a plurality of aluminum round bars having a diameter of 6 mm at intervals of 50 to 100 mm. Explaining the installation area of the piezoelectric sensor 1, the width direction A is set to a value larger than the shoulder width of the human body 12 and smaller than the width of the floor plate 4 based on the standard body shape of an adult male. Although not shown in the figure, the vertical direction is equivalent to the average height of saint men who are supposed to be used. With this arrangement, since the piezoelectric sensor 1 is arranged in a region where vibration from the living body 12 can be transmitted even when the sleeping position of the human body is shifted, vibration can be sufficiently detected.

  Then, as shown in FIG. 3, since the piezoelectric sensor 1 has flexibility and the rod-like member 9 is separated, the biological signal detection device 10 is bent or rolled in a direction perpendicular to the rod-like member 9. Since it can fold like normal bedding, it is easy to install and store.

  Since the mattress 4 is interposed between the biological signal detection device 10 and the human body 12 because it is installed between the bed floor plate 5 and the mattress 4, the piezoelectric sensor 1 and the aluminum round bar 9 are in direct contact with the human body 12. There is nothing, and it can be a thing that does not disturb bedtime.

  However, the arrangement location of the biological signal detection device 10 is not limited to this embodiment, or may be between the floor or the tatami mat and the mattress.

  In this example, the example in which the biological signal detection device 10 is installed in a bedclothing such as a bed has been described. However, the present invention is not limited to this and may be installed in a chair or a cushion. That is, if it is a household article which receives a human body load continuously, it will become possible to detect a biological signal like this Embodiment. In that case, the biological signal detection device of the present embodiment is installed, for example, between a seat surface of a chair and a cushion, and between a tatami mat and a cushion.

  Further, the film-like member is not limited to the cloth 8, and a resin sheet or the like may be used.

  Further, although a round bar made of metal such as aluminum is used as the hard bar-like member 9, the same effect can be expected with other metals having a hardness that does not compressively deform due to the weight or vibration of the living body, or a round bar made of resin. Further, the shape of the rod-like hard member 9 is not limited to a round cross section, and may be an oval shape, an elliptical shape, or a polygonal shape. In the case of a polygonal shape, the corner portion is chamfered so as not to damage the piezoelectric sensor 1. It is desirable.

  Further, the attachment method of the film-like member, the piezoelectric sensor, and the rod-like member is not limited to sewing, and may be adhesion.

  In addition, the diameter and the arrangement interval of the aluminum round bars are only one example, and the effects of the invention are not limited thereto. Further, in the present embodiment, the aluminum round bar is arranged in a direction orthogonal to the height direction of the sleeping living body, but may be parallel to the height direction, in which case the pressure-sensitive means is arranged to be orthogonal to the height direction. It will be. The piezoelectric sensor 1 used for the biological signal detection device 10 of the present invention will be described below.

  In FIG. 4, the piezoelectric sensor 1 includes a central electrode 101 made of a conductor as an inner electrode, a piezoelectric layer 102 that is a pressure-sensitive member, an outer electrode 103 made of a conductor, and a coating layer 104 made of an elastic body. As the piezoelectric layer 102, a resin-based polymer piezoelectric material such as polyvinylidene fluoride or a composite piezoelectric material obtained by mixing piezoelectric ceramic powder in a specific resin base material can be used. The outer electrode 103 is disposed so as to surround the inner electrode 101 and the piezoelectric layer 102. Since the piezoelectric sensor 1 has a coaxial cable shape, the outer electrode 103 serves as a shield with respect to the center electrode 101 that transmits a signal. It will be less susceptible to the effects of external electromagnetic noise. Therefore, even when an electronic device is used nearby to collect and process biological signals or a communication device such as a mobile phone is used nearby, the piezoelectric sensor 1 is less likely to cause noise to be superimposed. The high biological signal detection device 10 can be provided.

  Although the coaxial cable-like piezoelectric sensor 1 is shown as an example of the cable-like pressure-sensitive means having the inner electrode and the outer electrode, the present invention is not limited to this, and a cable having a plurality of center conductors, a center conductor The same effect can be obtained by using a cable that is eccentric from the center of the outer electrode, a cable whose cross-sectional shape is not circular, or the like.

Next, an example of processing of the output signal of the piezoelectric sensor 1 and an operation of detecting a biological signal from the human body will be described. FIG. 5 is a block diagram of the biological signal detection apparatus 10 according to the first embodiment of the present invention. In FIG. 5, the control unit 11 includes a detection unit 13, a determination unit 14, and a notification unit 15. The detection means 13 filters the output signal from the piezoelectric sensor 1 with a predetermined filtering characteristic, and amplifies the output signal of the filter section 16 with a predetermined set value. And a comparator unit 17 for comparison. As the filtering characteristics of the filter unit 16, for example, commercial power supply frequencies that are easily superimposed on the signal as noise are 50 Hz and 60 Hz, but the signal of the living body 12, for example, heartbeat is around 1 Hz, breathing is around 0.1 Hz, body motion Is a range of several Hz, and therefore, as a filtering characteristic, for example, a band-pass filter that passes a signal component of 0.05 Hz to 20 Hz is used.

  The operation and action of the biological signal detection device 10 configured as described above will be described below with reference to FIGS.

  FIG. 7 is a characteristic diagram showing temporal changes in the output signal V of the filter unit 16 and the output signal J of the comparator unit 17 corresponding to the output of the piezoelectric sensor 1 when vibration derived from the heartbeat of the human body 12 is applied to the piezoelectric sensor 1. It is.

First, as shown in FIG. 6, when the human body 12 lies on the bed, pressure such as weight from the human body 12 and vibration such as heartbeat are applied to the piezoelectric sensor 1 via the mattress 4. At this time, the piezoelectric sensor 1 is deformed, and a signal corresponding to the deformation acceleration of the piezoelectric sensor 1 is output by the piezoelectric effect. For this reason, pressure or the like due to body weight without variation is not detected, but only variation components with variation are detected. For example, body movement, respiration, heartbeat signal, and the like are detected. At this time, the bending deformation of the piezoelectric sensor 1 is increased particularly in the portion of the aluminum round bar 9, and a larger output signal can be obtained. And the output signal of the piezoelectric sensor 1 passes the signal of 0.05-20 Hz which is the frequency band at the time of the contact of the vibration from a human body, such as a heartbeat, by the filter part 16, and the signal of another frequency band is removed. . FIG. 7 shows the output signal V of the filter unit 16. When heartbeat vibration is detected, a signal component larger than the reference potential V ₀ appears in V. And the acceleration which is the secondary differential value of the deformation amount also increases, and as a result, the output signal of the piezoelectric sensor also increases. The comparator unit 17 is amplitude from _{V 0} which _V | V-V ₀ | is determined to detect the heartbeat vibration if larger than _{D 0,} and outputs the BALS signal of Lo → Hi → Lo as judging output at time t1.

  As described above, the signal output from the comparator unit 17 is input to the determination unit 14, and for example, the heart rate period, that is, the heart rate is known from the cycle Δt of the heart rate signal, and the notification unit 15 displays the heart rate or reports it by voice. it can.

(Embodiment 2)
A biological signal detection apparatus according to the second embodiment of the present invention will be described with reference to FIGS.

  The difference from the first embodiment is that the elastic member such as the sponge 18 is arranged on the biological signal detection device 10, and the piezoelectric sensor 1 is arranged so as to be sandwiched between the sponge 18 and the aluminum round bar 9. In the example shown in FIG. 8, the sponge 18 is placed on the floor plate 4 side, and the aluminum round bar 9 is placed on the mattress 5 side. The operation will be described below.

  The vibration from the human body 12 is transmitted to the piezoelectric sensor 1 through the mattress 5, the aluminum round bar 9 and the cloth 8. At that time, the sponge 18 is distorted. As a result, the piezoelectric sensor 1 is inserted into the sponge 18 together with the aluminum round bar 9 in the sponge 18 causing the depression deformation, and the piezoelectric sensor 1 is bent along the cross-sectional shape of the aluminum round bar 9 to generate a large signal output. To do. The hardness of the sponge 18 is preferably such that the sponge 18 is deformed by the weight of the human body 12 and the weight of the mattress 5 but does not collapse. For example, a material having a hardness of about the mattress 5 can be used.

Moreover, as shown in FIG. 9, you may arrange | position upside down in this structure. In this case, the aluminum round bar 9 is disposed on the floor plate 4 side and the sponge 18 is disposed on the mattress 5 side. The piezoelectric sensor 1 is indented into the sponge 18 together with the aluminum round bar 9 in the sponge 18 that is deformed by depression, and the piezoelectric sensor 1 is subjected to a bending action along the cross-sectional shape of the aluminum round bar 9. A large signal output is generated. Therefore, unlike the first embodiment, signals from the human body 12 can be detected with high sensitivity even if they are arranged without taking the front and back into consideration, and the biological signal detection device 10 that is easy to use can be obtained.

  Since the piezoelectric sensor 1 has flexibility and the sponge 18 also has elasticity, the biological signal detection device 10 can be bent or rounded, and installation and storage are facilitated.

(Embodiment 3)
A biological signal detection apparatus according to the third embodiment of the present invention will be described with reference to FIG.

  The difference from the first and second embodiments is that the piezoelectric sensor 1 is arranged in the biological signal detection device 10 such that a plurality of elastic members such as a bar-like sponge 19 are arranged opposite to the aluminum round bar 9. It arrange | positions so that it may pinch | interpose with the rod-shaped sponge 19 and the aluminum round bar 9 of a square cross section. In this example, the rod-shaped sponge 19 is placed on the floor plate 4 side, and the aluminum round bar 9 is placed on the mattress 5 side.

Since the piezoelectric sensor 1 has flexibility and the bar-like sponge 19 is separated, the biological signal detection device 10 can be bent or rolled in a direction perpendicular to the bar-like sponge 19 and the aluminum round bar 9. Furthermore, it becomes easy and installation property and storage property are improved.
In this configuration, they may be arranged upside down.

(Embodiment 4)
A biological signal detection apparatus according to the fourth embodiment of the present invention will be described with reference to FIG.

  The difference from the first to third embodiments is that a plurality of aluminum round bars 9 as the first plurality of rod-shaped members and a plurality of aluminum round bars as the second plurality of rod-shaped members are added to the biological signal detection device 10. The first aluminum round bar 9 and the second aluminum round bar 20 are arranged so as not to overlap each other at the point where the piezoelectric sensor 1 is sandwiched by 20. In this example, the aluminum round bar 9 and the aluminum round bar 20 are arranged in parallel to each other, and the aluminum round bar 9 is arranged between the aluminum round bars 20.

  At this time, the piezoelectric sensor 1 sandwiched between the first aluminum rod 9 and the second aluminum rod 20 by vibration from the human body 12 is subjected to a bending action along the cross-sectional shape of the aluminum round rod 9 and the aluminum round rod 20. A large signal output is generated. Also, even if the biological signal processing apparatus 10 is used on the back side, the bending action is applied along the cross-sectional shapes of the aluminum round bar 20 and the aluminum round bar 9 to generate a large signal output. Therefore, the biological signal processing apparatus 10 can be easily used.

  Here, the second aluminum rod 20 is arranged at an intermediate position between the adjacent first aluminum round rods 9. By doing so, the first aluminum rod 9 adjacent to the right side of the aluminum rod 20 secondly. Since the bending action is generated in the piezoelectric sensor 1 both between and between the first aluminum rod 9 adjacent to the left side, a biological signal can be detected efficiently.

  However, the present invention is not limited to this, even if the second aluminum bar is arranged at a position shifted from the intermediate position of the adjacent first aluminum round bar, the biological signal is detected even if there is a slight decrease in efficiency. Is possible.

In addition, the first plurality of bar members and the second plurality of bar members are not limited to round bars. An elliptical shape, an elliptical shape, or a rectangular shape may be used. In the case of a rectangular shape, it is desirable that corner portions are chamfered so as not to damage the piezoelectric sensor 1. Further, it goes without saying that the same effect can be expected even if the shapes of the first rod-shaped member 9 and the second rod-shaped member 20 are different.

  Furthermore, the biological signal detection device 10 can be bent or rolled in a direction perpendicular to the aluminum round bars 9 and 20, which facilitates installation and storage.

(Embodiment 5)
A biological signal detection apparatus according to a fifth embodiment of the present invention will be described with reference to FIG.

  The difference from the first to fourth embodiments is that the biological signal detection device 10 is arranged in the mattress 21. The padding 21, which is a soft member, is divided into upper and lower parts 22 a and 22 b, and the biological signal detection device 10 is assembled between them. If a hard bar-like member such as an aluminum bar 9 is installed so as to be parallel to the short side 21a of the mattress 21, it can be folded, for example, in the direction in which the long side 21b is bent, and stored in a closet like an ordinary mattress. Can be dried on clothesline. Therefore, the biological signal processing apparatus 10 that can be easily installed and stored can be provided.

  In addition to the mattress, it may be incorporated in a cushion or cushion.

(Embodiment 6)
A biological signal detection apparatus according to a sixth embodiment of the present invention will be described with reference to FIGS.

  The difference from the first to fifth embodiments is that the aluminum rod 9 of the biological signal detection device 10 is arranged along the side of the mattress, and the installation length A of the piezoelectric sensor 1 is made larger than that of the mattress 5. It is that.

  For example, in the example shown in FIG. 13, the installation length A of the piezoelectric sensor 1 is larger than the short side 5 a of the mattress 5. Here, the aluminum bar 9 is arranged in parallel with the long side 5 b of the mattress 5. Therefore, since the biological signal detection device 10 can be easily bent in a direction perpendicular to the aluminum rod 9, the portion protruding from the mattress 5 is bent and hangs down, so that it does not obstruct the passage around the bed. Further, the protruding portion may be folded and placed between the mattress 5 and the floor board 4.

  Usually, since the installation length A of the piezoelectric sensor is smaller than the width B of the biological signal detection device 10, the peripheral portion of the biological signal detection device 10 is structurally difficult to detect a signal. It becomes possible to detect up to the end of 5. That is, since the non-detectable area is eliminated, it is possible to detect the biological signal reliably regardless of where the human body 12 is on the mattress 5, for example, even if the human body 12 moves to the end of the mattress 5 by turning over. is there.

  For example, in the example shown in FIG. 14, the installation length of the piezoelectric sensor 1 is increased by the long side 5 b of the mattress 5. Here, the aluminum bar 9 is arranged in parallel with the short side 5 a of the mattress 5. Therefore, since the biological signal detection device 10 can be easily bent in a direction perpendicular to the aluminum rod 9, the portion protruding from the mattress 5 is bent and hangs down, so that it does not obstruct the passage around the bed. Further, the protruding portion may be folded and placed between the mattress 5 and the floor board 4. By doing so, since the end of the mattress 5 can be detected, the biological signal can be reliably detected regardless of the portion of the human body 12 on the mattress 5.

In the first to fifth embodiments, the cable-shaped piezoelectric sensor is used as the pressure-sensitive means. However, other types of piezoelectric sensors may be used, for example, a film-like or ribbon-like structure in which both surfaces of the PVDF thin film are sandwiched by electrodes as pressure-sensitive means. The same effect can be obtained by using this piezoelectric sensor. However, countermeasures against electromagnetic noise such as wrapping and shielding the sensor itself with a conductive sheet are taken as appropriate.

  In the first to fifth embodiments, the piezoelectric sensor 8 is used as the pressure-sensitive means. However, even if an optical fiber having a characteristic that the transmitted light is modulated in response to the pressure deformation is used as the pressure-sensitive means. There is a similar effect.

  As described above, the biological signal detection device according to the present invention can be easily bent by including a plurality of rod-shaped members for increasing sensitivity so as to cross the piezoelectric sensor. There is no hassle and it can be easily installed on a bed as described above and used to acquire biosignals. For example, it can be installed on relaxation equipment such as massage chairs, car seats, seats in entertainment facilities, etc. It can also be applied as a system for detecting Further, the present invention is applicable not only to a human body such as a pet mat, but also to uses for detecting biological signals of animals.

(A) Configuration diagram of the front surface of the biological signal detection device according to the first embodiment of the present invention (b) Configuration diagram of the back surface of the biological signal detection device Configuration diagram of a bed in which a biological signal detection device according to Embodiment 1 of the present invention is arranged The perspective view of the biosignal detection apparatus in Embodiment 1 of this invention. Sectional drawing of the piezoelectric sensor in Embodiment 1 of this invention 1 is a block diagram of a biological signal detection apparatus according to Embodiment 1 of the present invention. Sectional drawing of the principal part when the biological signal detection apparatus in Embodiment 1 of this invention is arrange | positioned to the bed. FIG. 5 is a characteristic diagram showing temporal changes in the output signal V of the filter unit and the output signal J of the comparator unit when a biological signal is received from the human body in the biological signal detection device according to the first embodiment of the present invention. Sectional drawing of the principal part when the biological signal detection apparatus in Embodiment 2 of this invention is arrange | positioned on the bed. Sectional drawing of the principal part when the biological signal detection apparatus in Embodiment 2 of this invention is arrange | positioned on the bed. Sectional drawing of the principal part when the biological signal detection apparatus in Embodiment 3 of this invention is arrange | positioned on the bed. Sectional drawing of the principal part when the biological signal detection apparatus in Embodiment 4 of this invention is arrange | positioned on the bed. The block diagram when arrange | positioning the biosignal detection apparatus in Embodiment 5 of this invention in the mattress (A) Configuration diagram when the biological signal detection device according to the sixth embodiment of the present invention is arranged on a bed (b) Configuration diagram of the biological signal detection device The block diagram when the biological signal detection apparatus in Embodiment 6 of this invention is arrange | positioned on the bed. 1 is a configuration diagram of a conventional biosignal detection device according to a first example. Sectional drawing of the principal part at the time of arrange | positioning the biological signal detection apparatus of the conventional 1st example to a bed Configuration diagram of conventional biological signal detection device of second example

Explanation of symbols

1 Piezoelectric sensor (coaxial cable pressure sensing means)
4 Floor board (structure)
5 Mattress (Flexible member placed under the living body)
8 Cloth (Flexible film-like member)
9 Aluminum round bars (multiple bars)
10 Biosignal detection device 18 Sponge (elastic member)
19 Stick-like sponge (multiple elastic members)
20 Aluminum round bar (second bar-like member)

Claims (9)

A pressure-sensitive means having flexibility for detecting pressure fluctuations generated by a living body, a plurality of rod-shaped members overlapping the pressure-sensitive means and intersecting the pressure-sensitive means, and a flexible film member, and the pressure-sensitive means And a bio-signal detection device having a configuration in which the rod-shaped member is integrally disposed on the film member. 2. The biological signal detection device according to claim 1, wherein the pressure sensitive means is on the living body side. The biological signal detection device according to claim 1, further comprising an elastic member, and disposed integrally with the film member so that the pressure-sensitive means is sandwiched between the rod-shaped member and the elastic member. The biological signal detection device according to claim 1, further comprising a plurality of elastic members, wherein the plurality of elastic members are integrally disposed on the film member so as to face the rod-shaped member with the pressure-sensitive means interposed therebetween. 5. The structure according to claim 1, further comprising a second plurality of rod-shaped members sandwiching the pressure-sensitive means, wherein the plurality of rod-shaped members and the second plurality of rod-shaped members are arranged so as not to overlap each other. The biological signal detection device according to Item. The living body detection apparatus according to any one of claims 1 to 5, wherein the arrangement direction of the rod-shaped member is a direction parallel to or perpendicular to the height direction of the living body. The pressure-sensitive means comprises an inner electrode, a pressure-sensitive member provided around the inner electrode, and an outer electrode provided around the pressure-sensitive member, and is configured in a cable shape. The biological signal detection device according to Item. A flexible member disposed under a living body, a structure that supports the flexible member, and the biological signal detection device according to any one of claims 1 to 7, wherein the biological detection device includes the flexibility. A sleeping device arranged between a member and the structure. The living body detection device according to claim 8 and a sleeping device provided with the living body detection device according to claim 8, wherein the installation length of the pressure-sensitive means is larger than the length of the side of the flexible member.