WO2015046055A1 - Dispositif de détection d'information biologique et siège équipé du dispositif de détection d'information biologique - Google Patents

Dispositif de détection d'information biologique et siège équipé du dispositif de détection d'information biologique Download PDF

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Publication number
WO2015046055A1
WO2015046055A1 PCT/JP2014/074846 JP2014074846W WO2015046055A1 WO 2015046055 A1 WO2015046055 A1 WO 2015046055A1 JP 2014074846 W JP2014074846 W JP 2014074846W WO 2015046055 A1 WO2015046055 A1 WO 2015046055A1
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WIPO (PCT)
Prior art keywords
detection
biological information
human body
electrode
detection device
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PCT/JP2014/074846
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English (en)
Japanese (ja)
Inventor
厚志 後藤
大滝　幸夫
吉村　隆
敏行 星
秀晴 大竹
Original Assignee
アルプス電気株式会社
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Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2015046055A1 publication Critical patent/WO2015046055A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
    • A61B5/18—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state for vehicle drivers or machine operators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02444—Details of sensor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • A61B5/6893—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon

Definitions

  • the present invention relates to a biological information detection device and a seat including the biological information detection device.
  • a biological information detection apparatus that is disposed in a vehicle seat and detects biological information of a vehicle driver (human body) has been put into practical use.
  • a biological information detection device is used when detecting biological information such as a driver's heartbeat interval and determining the driver's arousal level based on the detected data.
  • FIG. 10 is an explanatory diagram showing a configuration of the heartbeat detection device 200 according to Patent Document 1.
  • FIG. 10A is an explanatory diagram illustrating an example of use of the heartbeat detection device 200
  • FIG. 10B is an explanatory diagram illustrating a configuration of the heartbeat detection device 200.
  • the heartbeat detection device 200 is a device that detects the heartbeat of an occupant 211 (human body) who gets on the vehicle and sits on the seat 212.
  • the heartbeat detection device 200 includes a sensor unit 201 and a calculation unit 202.
  • the calculation unit 202 includes a heartbeat cycle signal calculation unit 203, an R wave existence section setting unit 204, a heartbeat peak signal calculation unit 205, an R wave calculation unit 206, and an RRI calculation unit 207.
  • the sensor unit 201 is a detection device of a type called a Doppler sensor, and detects the movement of the body surface of the occupant 211 using a transmission signal transmitted to the occupant 211 and a reflection signal thereof.
  • the heartbeat cycle signal calculation unit 203 calculates a sinusoidal heartbeat cycle signal indicating the periodicity of the heartbeat of the occupant 211 from the heartbeat source signal.
  • the R wave existence section setting unit 204 sets an R wave existence section based on the heartbeat cycle signal.
  • the heartbeat peak signal calculation unit 205 calculates a heartbeat peak signal in which the heartbeat peak signal is emphasized from the heartbeat source signal that is the output of the sensor unit 201.
  • the R wave calculation unit 206 calculates a peak wave as an R wave based on amplitude information from the heartbeat peak signal.
  • the RRI calculation unit 207 calculates a time interval (RRI: RR Interval) between two R waves that are adjacent in time, and determines whether the calculated time interval is an abnormal value.
  • the heartbeat detection device 200 detects a biometric information test relating to the heartbeat of the occupant 211 seated on the seat 212.
  • the heart rate detection device 200 detects biological information at a specific part of the back of the vehicle seat 212 using only the Doppler sensor, there is a change in the posture of the occupant 211, a change in the environment, and the like. In such a case, there is a problem that detection of biological information is likely to be missed, and detection of biological information cannot be reliably performed.
  • the present invention has been made in view of such a state of the art, and an object of the present invention is to provide a biological information detection apparatus capable of more reliably detecting biological information.
  • the biological information detection device is a biological information detection device that detects biological information of a human body, and includes a detection surface that is arranged so that the human body is positioned forwardly. Detecting biological information of the human body using capacitive coupling between a plurality of detection electrodes arranged behind the detection surface along the detection surface and the human body adjacent to the detection electrode First detection means for detecting a living body information of the human body using the transmission signal and the reflected signal, and a radiation unit that radiates a transmission signal toward the human body and receives the reflected signal. And the radiating portion is arranged at a position that does not overlap the detection electrode when viewed from the front.
  • biometric information is detected using the first detection means and the second detection means having different detection methods. Since the first detection means and the second detection means have different environments suitable for detection, it is easy to prevent detection of biological information from being missed even when there is a change in the posture of the human body or a change in the surrounding environment.
  • the radiating portion is arranged at a position that does not overlap the detection electrode when viewed from the front, the transmission signal radiated from the radiating portion becomes a noise component and affects the capacitive coupling between the detection electrode and the human body. The influence can be reduced. In addition, it is possible to reduce the influence of the detection electrode blocking the transmission signal radiated from the radiating unit and the reflected signal. Thus, in the biological information detection device, interference between the first detection means and the second detection means can be suppressed. As a result, biometric information can be detected more reliably.
  • the detection electrode when viewed from the front, is disposed so as to be positioned in a peripheral portion of the detection surface, and the radiating portion is positioned in a central portion of the detection surface. It is arranged so that it may be arranged.
  • the radiating portion is disposed so as to be positioned at the center of the detection surface when viewed from the front. Therefore, even if the position of the human body is somewhat shifted, the transmission signal can be reliably transmitted to the human body.
  • the detection electrode is arrange
  • the biological information detection apparatus wherein the radiation unit is arranged so as not to protrude forward from the detection electrode.
  • the radiating portion is disposed so as not to protrude forward from the detection electrode. Therefore, even if the human body is close to the detection electrode, the human body does not contact the radiation portion. Therefore, it is possible to prevent discomfort caused by the human body coming into contact with the radiating portion. Further, since the radiating portion does not protrude forward from the detection electrode, the distance between the detection electrode and the human body can be reduced. Therefore, it is possible to prevent a decrease in detection accuracy due to a distance between the detection electrode and the human body.
  • the seat according to claim 4 is a seat on which the human body is seated, and has a backrest part that supports the back of the human body from behind, and the backrest part is provided with any one of claims 1 to 3.
  • the living body information detection device is provided, and the backrest surface of the backrest portion is a detection surface of the living body information detection device according to any one of claims 1 to 3.
  • the seat having this configuration has a backrest portion on which a biological information detection device is disposed. Therefore, in the seat with this configuration, it is possible to detect biological information through the back of the seated human body. Since the back is close to the heart, it is suitable for detecting biological information related to heartbeat activity such as electrocardiogram and heartbeat motion of a human body seated on the seat.
  • the biological information detection device is a biological information detection device that detects biological information of a human body, the detection surface being arranged so that the human body is positioned above, and the detection surface along the detection surface.
  • a plurality of detection electrodes disposed below a detection surface; and first detection means for detecting biological information of the human body using capacitive coupling between the detection electrodes and the human body adjacent to the detection electrodes;
  • a pressure-sensitive sheet for detecting pressure from the human body, and second detection means for detecting biological information of the human body using the pressure detected by the pressure-sensitive sheet, wherein the pressure-sensitive sheet includes the detection electrode. It is arranged on the lower side.
  • biometric information is detected using the first detection means and the second detection means having different detection methods. Since the first detection means and the second detection means have different environments suitable for detection, it is easy to prevent detection of biological information from being missed even when there is a change in the posture of the human body or a change in the environment. In addition, since the pressure-sensitive sheet is not interposed between the detection electrode and the human body, it is possible to prevent the pressure-sensitive sheet from affecting the capacitive coupling between the detection electrode and the human body. Further, by making the detection electrode thin, it is possible to easily transmit the pressure from the human body to the pressure-sensitive sheet, and it is possible to prevent the detection electrode from affecting the piezoelectric detection. Thus, in the biological information detection device, the first detection unit and the second detection unit can be prevented from interfering with each other. As a result, biometric information can be detected more reliably.
  • the biological information detection apparatus wherein the detection surface has two side end portions facing each other, and the pressure-sensitive sheet has a plurality of pressure-sensitive elements extending over the two side end portions. It is characterized by having.
  • the pressure-sensitive sheet has a plurality of pressure-sensitive elements extending over two side ends of the detection surface. Therefore, even if the position of the human body is slightly deviated, it is easy to prevent pressure detection omission. As a result, biometric information can be detected more reliably.
  • the seat according to claim 7 is a seat on which the human body is seated, and has a seat portion that supports a lower part of the human body from below, and the living body according to claim 5 or 6 is provided in the seat portion.
  • An information detection device is provided, and a seating surface of the seating portion is a detection surface of the biological information detection device according to claim 5 or 6.
  • the seat having this configuration has a seating portion in which a biological information detection device is disposed. Therefore, in the seat with this configuration, it is possible to detect biological information through the seated portion of the seated human body.
  • the seat is always pressed against the seating surface while seated, so that the proximity between the detection electrode and the seat is easily stabilized, and the pressure from the seat is easily transmitted to the pressure sensitive sheet. Therefore, such a seat is suitable for detecting biological information related to heartbeat activity, such as electrocardiograms and pressure fluctuations in the vicinity of the seat of the seated human body.
  • the seat according to claim 8 is a seat on which the human body is seated, and includes a backrest portion that supports the back of the human body from behind, and a seating portion that supports the waist portion of the human body from below, and the backrest.
  • the living body information detection device according to any one of claims 1 to 3 is disposed in a portion, and the backrest surface of the backrest portion is the living body information detection device according to any one of claims 1 to 3.
  • the living body information detection device according to claim 5 or 6 is arranged in the seating part, and the seating surface of the seating part is the living body information detection according to claim 5 or 6. It is a detection surface of the apparatus.
  • the seat having this configuration has a backrest portion and a seating portion in which a biological information detection device is disposed. For this reason, in the seat with this configuration, it is possible to detect biological information through the back of the human body seated and the waist. And detection of biometric information can be performed more reliably by detecting biometric information through a plurality of parts, such as the back and the elbow of the human body.
  • FIG. 1 It is explanatory drawing which shows typically the side cross-section of the pressure sensitive element 122 shown in FIG. It is explanatory drawing which shows arrangement
  • FIG. 1 It is explanatory drawing which shows typically the side cross-section of the pressure sensitive element 122 shown in FIG. It is explanatory drawing which shows arrangement
  • FIG. 1 is an explanatory diagram showing a usage example of the biological information detection apparatus 1 according to the first embodiment of the present invention.
  • FIG. 2 is an explanatory diagram showing the arrangement of the biological information detection device 1 shown in FIG. 2A is a view of the seat 70 as viewed from the front
  • FIG. 2B is a view of the seat 70 and the driver 60 as viewed from the side.
  • FIG. 3 is an explanatory diagram showing a configuration of the biological information detection apparatus 1 shown in FIG.
  • FIG. 3 is an exploded perspective view of the biological information detection apparatus 1.
  • FIG. 4 is an explanatory diagram showing the arrangement of the detection electrodes 12 and the radiation portions 22 shown in FIG. 4A is a view of the detection electrode 12 and the radiating portion 22 as viewed from above
  • FIG. 4B is a view of the detection electrode 12 and the radiating portion 22 as viewed from the front.
  • the biological information detection apparatus 1 is used by being disposed in a vehicle seat 70 to detect biological information of a vehicle driver 60 (human body).
  • the seat 70 has a backrest portion 71 that supports the back 61 of the driver 60 from behind. Of the front surface of the backrest portion 71, a substantially rectangular portion with which the back 61 of the driver 60 contacts is a backrest surface 72.
  • the seat 70 also has a seating portion 73 that supports the driver's 60 seat 62 from below. Of the upper surface of the seating portion 73, a substantially rectangular portion with which the driver's 60 dent portion 62 contacts is a seating surface 74.
  • the driver 60 is seated on the seat 70 such that the back 61 is located in front of the backrest surface 72 and the elbow 62 is located above the seating surface 74.
  • the biological information detection device 1 is disposed on the backrest portion 71 of the seat 70, and the backrest surface 72 of the seat 70 is the detection surface 2 of the biological information detection device 1.
  • the biological information detection apparatus 1 includes first detection means 10 and second detection means 20 as shown in FIG.
  • the first detection means 10 and the second detection means 20 are disposed inside the backrest portion 71.
  • the 1st detection means 10 and the 2nd detection means 20 are connected to the control apparatus 30 arrange
  • the first detection means 10 is a capacitive coupling type detection device. As shown in FIG. 3, the first detection means 10 includes a detection sheet 11, six detection electrodes 12 formed on the front side of the detection sheet 11, and a ground electrode 13 formed on the back side of the detection sheet 11. ,have.
  • the detection sheet 11 is a film made of an insulator such as cloth. The detection sheet 11 is disposed behind the detection surface 2 along the detection surface 2.
  • the detection electrode 12 is a substantially rectangular electrode.
  • the surface of the detection electrode 12 is covered with an insulating protective film (not shown).
  • the three detection electrodes 12 are arranged side by side so as to be positioned at the left end portion (peripheral portion) of the detection surface 2 when viewed from the front, and the other three detection electrodes 12 When viewed from above, they are arranged side by side so as to be located at the right end (peripheral part) of the detection surface 2.
  • the driver 60 is seated, the back 61 of the driver 60 comes close to the detection electrode 12.
  • the detection electrode 12 and the back 61 are capacitively coupled. And the detection electrode 12 respond
  • the ground electrode 13 is formed at positions corresponding to the upper end, lower end, left end, right end (peripheral portion) of the detection surface 2 when viewed from the front.
  • the ground electrode 13 is not formed at a position corresponding to the central portion of the detection surface 2.
  • the ground electrode 13 is grounded via a wiring or the like (not shown), and the capacitive coupling between the detection electrode 12 and the back 61 is stabilized.
  • the ground electrode 13 may be omitted.
  • the detection sheet 11 may be provided with a feedback electrode that feeds back an electric signal for noise removal to the back 61 of the driver 60.
  • the second detection means 20 is a detection device called a Doppler sensor. As shown in FIG. 3, the second detection unit 20 includes two main body parts 21 each including a transmission / reception circuit, a radiation part 22 formed on the front side of the main body part 21, and two main body parts 21. And a fixed frame 24 to which the mounting plate 23 is fixed.
  • the radiating unit 22 is an antenna for transmitting and receiving a high-frequency electromagnetic wave signal.
  • the radiating portion 22 is obtained, for example, by forming a predetermined electrode pattern on the other plate surface of the wiring board on which the transmission / reception circuit is formed on one plate surface.
  • the radiating unit 22 is connected to a transmission / reception circuit built in the main body unit 21 through a wiring or the like (not shown).
  • the radiation unit 22 radiates the high-frequency transmission signal generated by the main body unit 21 as an electromagnetic wave signal to the back 61 of the driver 60 and receives a reflection signal from the back 61 of the driver 60 of the transmission signal.
  • the reflected signal received by the radiating unit 22 is mixed with the transmission signal by the main body unit 21.
  • the main-body part 21 is outputting the detection signal based on the mixed signal of a transmission signal and a reflected signal.
  • the detection signal is an electrical signal including operation information related to the movement of the back 61 (hereinafter, abbreviated as a heartbeat operation) associated with a biological activity such as a heartbeat of the driver 60.
  • the electrical signal output from the main body 21 is transmitted to the control device 30.
  • the mounting plate 23 is a plate-like member made of metal such as aluminum.
  • the radiating portion 22 is attached to the front side of the mounting plate 23 by a method such as adhesion.
  • the fixed frame 24 is a frame-shaped member made of metal such as aluminum.
  • the attachment plate 23 is fixed to the fixed frame 24 by a method such as screwing, and the fixed frame 24 is fixed inside the backrest portion 71 of the seat 70.
  • emission part 22 is arrange
  • the radiating portion 22 is positioned so as not to overlap the detection electrode 12 and the ground electrode 13 when viewed from the front. Further, the radiating portion 22 is arranged so as not to protrude in front of the detection electrode 12.
  • the control device 30 controls the first detection means 10 and the second detection means 20. In addition, the control device 30 operates based on the electrical signals transmitted from the six detection electrodes 12 of the first detection means 10 and the electrical signals transmitted from the two main body portions 21 of the second detection means 20. Biological information relating to the heartbeat and the like of the person 60 is calculated.
  • the biological information is detected by using the first detection means 10 and the second detection means 20 having different detection methods as described above. Since the detection principle of biological information using a capacitive coupling type detection device is known, detailed description thereof is omitted. In addition, since the detection principle of biological information using a Doppler sensor type detection device is also known, detailed description is omitted.
  • the control device 30 calculates biological information based on the electrical signal related to the electrocardiogram transmitted from the first detection means 10 and the electrical signal related to the heartbeat motion transmitted from the second detection means 20. The possibility of detection failure of biological information can be reduced.
  • the biological information is calculated based on the electrical signal transmitted from one detection electrode 12.
  • the accuracy of detection can be improved by calculating the biological information based on the difference between the electrical signals transmitted from the plurality of detection electrodes 12. Therefore, it is desirable that the number of detection electrodes 12 is plural.
  • the biological information of the driver 60 is detected using the first detection means 10 and the second detection means 20 that are different in detection method.
  • the first detection unit 10 and the second detection unit 20 have different environments suitable for detection. Therefore, even if there is a change in the posture of the driver 60, a change in the surrounding environment, or the like, It is easy to prevent detection leakage.
  • the radiation part 22 is arranged at a position that does not overlap the detection electrode 12 and the ground electrode 13 when viewed from the front, the transmission signal radiated from the radiation part 22 is arranged by the detection electrode 12 and the ground electrode 13. The driver 60 can be reached through an area that is not.
  • the biological information detection apparatus 1 can reduce the influence of the transmission signal radiated from the radiating unit 22 on the capacitive coupling between the detection electrode 12 and the human body as a noise component. Moreover, the influence by the detection electrode 12 blocking the transmission signal radiated
  • the radiating unit 22 is disposed so as to be located at the center of the detection surface when viewed from the front. Therefore, even if the position of the back 61 of the driver 60 is slightly shifted, the transmission signal can be reliably transmitted to the back 61 of the driver 60.
  • the detection electrode 12 is arrange
  • the radiating unit 22 is disposed so as not to protrude forward from the detection electrode 12. Therefore, even if the back 61 of the driver 60 is close to the detection electrode 12, the back 61 of the driver 60 does not contact the radiation unit 22. Therefore, discomfort caused by the driver's 60 back 61 coming into contact with the radiation portion 22 can be prevented. Moreover, since the radiation part 22 does not protrude forward from the detection electrode 12, the distance between the detection electrode 12 and the back 61 of the driver 60 can be reduced. Therefore, it is possible to prevent a decrease in detection accuracy due to the distance between the detection electrode 12 and the back 61 of the driver 60 being increased.
  • the seat 70 of the present embodiment has a backrest portion 71 that supports the back 61 of the driver 60 from behind, and the biological information detection device 1 is disposed in the backrest portion 71.
  • the backrest surface 72 of the backrest 71 is the detection surface 2 of the biological information detection device 1. Therefore, in the seat 70 having this configuration, the biological information of the driver 60 can be detected through the back 61 of the driver 60 who is seated.
  • the back 61 is close to the heart, it is suitable for detecting biological information related to heartbeat activity such as electrocardiogram and heartbeat motion of the driver 60 seated on the seat 70.
  • FIG. 5 is an explanatory diagram showing a usage example of the biological information detection apparatus 101 according to the second embodiment of the present invention.
  • FIG. 6 is an explanatory diagram showing the arrangement of the biological information detection apparatus 101 shown in FIG.
  • FIG. 6A is a view of the seat 70 viewed from above
  • FIG. 6B is a view of the seat 70 and the driver 60 viewed from the side.
  • FIG. 7 is an explanatory diagram showing the configuration of the biological information detection apparatus 101 shown in FIG.
  • FIG. 7 is an exploded perspective view of the biological information detection apparatus 101.
  • FIG. 8 is an explanatory view schematically showing a side sectional structure of the pressure sensitive element 122 shown in FIG.
  • the biological information detection apparatus 101 is disposed and used in a vehicle seat 70 to detect biological information of a driver 60 (human body) of the vehicle.
  • the seating surface 74 is the detection surface 102 of the biological information detection device 101.
  • the biological information detection apparatus 101 includes first detection means 110 and second detection means 120 as shown in FIG.
  • the first detection unit 110 and the second detection unit 120 are disposed inside the seating portion 73.
  • the 1st detection means 110 and the 2nd detection means 120 are connected to the control apparatus 30 arrange
  • the first detection means 110 is a capacitive coupling type detection device. As shown in FIG. 7, the first detection unit 110 includes a detection sheet 111, two detection electrodes 112 formed on the upper surface side of the detection sheet 111, and a ground electrode 113 formed on the lower surface side of the detection sheet 111. ,have.
  • the detection sheet 111 is disposed below the detection surface 102 along the detection surface 102.
  • the detection electrode 112 is a substantially rectangular electrode.
  • the surface of the detection electrode 112 is covered with an insulating protective film (not shown).
  • the two detection electrodes 112 are arranged side by side so as to be positioned on the rear side of the detection surface 102 when viewed from above.
  • the driver 60 is seated, the driver's 60 seat 62 is brought close to the detection electrode 112.
  • the detection electrode 112 and the waist portion 62 are capacitively coupled. Then, the sensing electrode 112 uses a capacitive coupling between the sensing electrode 112 and the waist portion 62 to change the surface potential of the waist portion 62 due to a biological activity such as a heartbeat of the driver 60 (hereinafter abbreviated as electrocardiogram). ) Is detected. The electrical signal detected by the detection electrode 112 is transmitted to the control device 30.
  • the ground electrode 113 is formed at a position corresponding to the entire surface of the detection surface 102 when viewed from above.
  • the ground electrode 113 is grounded via an unillustrated wiring or the like, and stabilizes the capacitive coupling between the detection electrode 112 and the rod portion 62.
  • the ground electrode 113 may not be provided.
  • the detection sheet 111 may be provided with a feedback electrode or the like that feeds back an electric signal for noise removal to the bellows 62.
  • the second detection means 120 is a piezoelectric detection device. As shown in FIG. 7, the second detection unit 120 is arranged on the pressure-sensitive sheet 121, the four pressure-sensitive elements 122 arranged on the upper surface side of the pressure-sensitive sheet 121, and the lower surface side of the pressure-sensitive sheet 121. And a cushion 127.
  • the pressure sensitive sheet 121 is a film made of an insulator such as cloth.
  • the pressure-sensitive element 122 is an element having an elongated rectangular shape when viewed from above, and extends from the left end portion of the seating surface 74 to the right end portion.
  • the four pressure sensitive elements 122 are arranged on the upper surface of the pressure sensitive sheet 121 so as to be arranged at substantially equal intervals in the front-rear direction. As shown in FIG. 8, the pressure sensitive element 122 is formed on the insulating film 123 disposed on the upper surface side of the pressure sensitive sheet 121, the first electrode layer 124 formed on the insulating film 123, and the first electrode layer 124.
  • the piezoelectric layer 125 and the second electrode layer 126 formed thereon are configured.
  • a resin in which fine particles of piezoelectric ceramic such as barium titanate are kneaded is used as a material used for the piezoelectric layer 125.
  • the surface of the pressure sensitive element 122 is covered with an insulating protective film (not shown).
  • the pressure sensitive element 122 has a piezoelectric effect.
  • the pressure-sensitive element 122 uses the piezoelectric effect to make an electrical signal corresponding to a minute change in pressure from the waist portion 62 (hereinafter, abbreviated as pressure fluctuation) due to a biological activity such as a heartbeat of the driver 60. Is generated.
  • the electrical signal generated by the pressure sensitive element 122 is transmitted to the control device 30.
  • the cushion 127 is a plate-like member made of a resin having elasticity such as urethane.
  • the cushion 127 is held inside the seating portion 73 and supports the detection sheet 111 and the pressure sensitive sheet 121 from below.
  • the control device 30 controls the first detection means 110 and the second detection means 120. Further, the control device 30 is based on the electrical signals transmitted from the two detection electrodes 112 of the first detection means 110 and the electrical signals transmitted from the four pressure sensitive elements 122 of the second detection means 120. Biological information related to the heartbeat and the like of the driver 60 is calculated.
  • the biological information detection apparatus 101 detects biological information using the first detection means 110 and the second detection means 120 having different detection methods. Since the detection principle of biological information using a capacitive coupling type detection device is known, detailed description thereof is omitted. Further, since the detection principle of biological information using a piezoelectric detection device is also known, detailed description thereof is omitted.
  • the first detection means 110 needs to bring the driver's 60 belly part 62 close to the detection electrode 112, if the staring part 62 is close to the detection electrode 112, the driver 60 moves the body somewhat. Has the advantage of being able to detect stably.
  • the second detection means 120 is likely to become unstable when the driver 60 moves his body. However, if the pressure from the waist portion 62 is transmitted to the pressure sensitive element 122, the second portion 120 62 has the advantage that it can be detected even if it is not close to the pressure sensitive element 122.
  • the control device 30 calculates the biological information based on the electrical signal transmitted from the first detection unit 110 and the electrical signal transmitted from the second detection unit 120, thereby detecting the detection of biological information. The possibility of this can be reduced.
  • the biometric information of the driver 60 is detected using the first detection unit 110 and the second detection unit 120 having different detection methods.
  • the environment suitable for detection differs between the first detection unit 110 and the second detection unit 120, even if there is a change in the posture of the driver 60, a change in the environment, or the like, detection of biological information is not performed. It is easy to prevent.
  • the pressure sensitive sheet 121 is not interposed between the detection electrode 112 and the driver's 60 belly part 62, the pressure sensitive sheet 121 affects the capacitive coupling between the detection electrode 112 and the belly part 62. Can be prevented.
  • the biological information detection apparatus 101 can prevent the first detection unit 110 and the second detection unit 120 from interfering with each other. As a result, the biological information detection apparatus 101 can more reliably detect biological information.
  • the pressure sensitive sheet 121 has four pressure sensitive elements 122 extending over two side end portions of the seating surface 74. Therefore, even if the position of the waist portion 62 of the driver 60 is slightly deviated, it is easy to prevent the detection of pressure from being detected. As a result, the biological information detection apparatus 101 can more reliably detect biological information.
  • the seat 70 has a seating portion 73 that supports the den 62 of the driver 60 from below, and the living body information detection device 101 is disposed in the seating portion 73.
  • the seating surface 74 of the seating portion 73 is the detection surface 102 of the biological information detection device 101. Therefore, in the seat 70 having this configuration, the biological information of the driver 60 can be detected through the seat 62 of the driver 60 who is seated.
  • the seat 62 is always pressed against the seating surface 74 while seated, so that the proximity of the detection electrode 112 and the seat 62 can be stabilized, and the pressure from the seat 62 is applied to the pressure sensitive sheet 121. Easy to tell. Therefore, such a seat 70 is suitable for detecting biological information related to heartbeat activity such as electrocardiogram and pressure fluctuation in the vicinity of the seat 62 of the driver 60 who is seated.
  • FIG. 9 is an explanatory diagram showing the arrangement of the biological information detection device 1 and the biological information detection device 101 according to the third embodiment of the present invention.
  • FIG. 9A is a view of the seat 70 viewed from the front
  • FIG. 9B is a view of the seat 70 and the driver 60 viewed from the side.
  • the biological information detection device 1 and the biological information detection device 101 are disposed in a seat 70.
  • the biological information detection apparatus 1 is the same as that described in the first embodiment.
  • the biological information detection apparatus 101 is the same as that described in the second embodiment.
  • the 1st detection means 10 and the 2nd detection means 20 of the biometric information detection apparatus 1 are connected to the control apparatus 30 via the wiring which is not shown in figure.
  • Both the first detection means 110 and the second detection means 120 of the biological information detection apparatus 101 are connected to the control apparatus 30 via wiring (not shown).
  • the first detection means 10 and the second detection means 20 of the biological information detection apparatus 1 and the first detection means 110 and the second detection means 120 of the biological information detection apparatus 101 are provided at the same time. ing.
  • the seat 70 of the present embodiment has a backrest portion 71 that supports the driver's 60 back 61 from behind, and the biological information detection device 1 is disposed on the backrest portion 71. Further, the seat 70 has a seating portion 73 that supports the driver's 60 seat 62 from below, and the living body information detecting device 101 is disposed in the seating portion 73. Therefore, in the seat 70 having this configuration, it is possible to detect the biological information of the human body through the back 61 and the elbow 62 of the driver 60 who is seated. And by detecting biometric information through a plurality of parts of driver 60, biometric information can be detected more reliably.
  • the detection of the biological information can be continued if the den 62 is close to the seat 73.
  • the detection of the biological information can be continued if the back 61 is close to the backrest 71.
  • the biological information detection device 1 Even if the detection result of the biological information detection device 1 shows an abnormal value due to the influence of noise generated in the vicinity of the backrest 71, if the biological information detection device 101 is operating normally, the biological information detection device Detection failure can be prevented using the detection result 101. On the contrary, even if the detection result of the biological information detection device 101 shows an abnormal value due to the influence of noise generated near the seating portion 73, if the biological information detection device 1 is operating normally, the biological information detection device 1 Detection failure can be prevented using the detection result.
  • the orientation of the detection surface 2 of the biological information detection apparatus 1 may be changed as appropriate according to the usage status of the apparatus.
  • the detection surface 2 may face the up-down direction or the diagonal direction instead of the front-rear direction.
  • the detection surface 2 of the biological information detection apparatus 1 may be a surface other than the backrest surface 72 of the seat 70.
  • the biological information detection apparatus 1 does not set only the back 61 of the driver 60 as a detection target, but may set the shoulder or waist of the driver 60 as a detection target.
  • the number of detection electrodes 12 of the first detection means 10 is not limited to six. If sufficient detection accuracy is obtained, the number of detection electrodes 12 may be two. If the detection accuracy is to be further improved, the number of detection electrodes 12 may be further increased. Further, the detection electrode 12 may be disposed so as to be located at the upper end portion or the lower end portion of the detection surface 2 when viewed from the front.
  • the number of the radiating portions 22 of the second detection means 20 is not limited to two. As long as sufficient detection accuracy is obtained, the number of the radiation parts 22 may be one. Further, when it is desired to further improve the detection accuracy, the number of the radiation portions 22 may be further increased.
  • the main body 21 and the radiating part 22 of the second detection means 20 may be arranged separately.
  • the radiating portion 22 may be an electrode pattern formed together with the detection electrode 12 on the front surface of the detection sheet 11.
  • the main-body part 21 may be arrange
  • the mounting plate 23 and the fixing frame 24 may be omitted.
  • the second detection means 20 does not detect the biological information of the driver 60 using a high-frequency electromagnetic wave signal, but uses the ultrasonic signal to detect the biological information of the driver 60. May be detected.
  • the radiating unit 22 is a device that combines a speaker that radiates an ultrasonic transmission signal and a microphone that receives a reflected signal from the driver 60 of the transmission signal.
  • the orientation of the detection surface 102 of the biological information detection apparatus 101 may be changed as appropriate according to the use status of the apparatus.
  • the detection surface 102 of the biological information detection apparatus 101 may be a surface other than the seating surface 74 of the seat 70.
  • the biological information detection apparatus 101 may be used by being disposed other than the seat 70 of the vehicle.
  • the biological information detection apparatus 101 does not set only the waist part 62 of the driver 60 as a detection target, but may set the thigh of the driver 60 as a detection target.
  • the number of detection electrodes 112 of the first detection means 110 is not limited to two. If it is desired to further improve the detection accuracy, the number of detection electrodes 112 may be further increased.
  • the number of pressure sensitive elements 122 of the second detection means 120 is not limited to four.
  • the number of pressure sensitive elements 122 may be three or less as long as sufficient detection accuracy is obtained. Further, when it is desired to further improve the detection accuracy, the number of pressure sensitive elements 122 may be further increased. Further, the pressure sensitive element 122 may extend from the front end portion of the detection surface 102 to the rear end portion.
  • the pressure sensing element 122 of the second detection means 120 is other than that shown in FIG.
  • An element having the structure may be used.
  • the pressure-sensitive element 122 may be an element such as a strain gauge that is distorted corresponding to the pressure from the rod 62 and the resistance value changes corresponding to the distortion.
  • the air pressure of the second detecting means 120 is changed according to the pressure from the pressure part 62, and the pressure sensing element 122 is an element such as a pressure sensor for detecting the pressure of the air bag. It doesn't matter.

Abstract

L'invention concerne un dispositif de détection d'information biologique (1) équipé d'une surface de détection réalisée de manière telle qu'une personne est positionnée sur sa partie avant, d'une pluralité d'électrodes de détection (12) positionnées le long de la surface de détection sur sa partie arrière, d'un premier moyen de détection (10) pour détecter l'information biologique de la personne à l'aide d'un couplage capacitif entre les électrodes de détection (12) et la personne proche des électrodes de détection (12), d'une unité d'émission (22) pour émettre un signal de transmission vers la personne et recevoir le signal réfléchi par celle-ci, et d'un deuxième moyen de détection (20) pour détecter l'information biologique de la personne à l'aide du signal de transmission et du signal réfléchi. Selon l'invention, il est possible de détecter l'information biologique de manière plus définitive lorsque l'unité d'émission (22) est positionnée de manière à ne pas recouvrir les électrodes de détection (12) lorsqu'elles sont observées à partir de l'avant.
PCT/JP2014/074846 2013-09-27 2014-09-19 Dispositif de détection d'information biologique et siège équipé du dispositif de détection d'information biologique WO2015046055A1 (fr)

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JP2013201937A JP2016198121A (ja) 2013-09-27 2013-09-27 生体情報検知装置及び生体情報検知装置を備えた座席
JP2013-201937 2013-09-27

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CN110461223A (zh) * 2017-04-03 2019-11-15 提爱思科技股份有限公司 生物传感器的配置构造
US20230045261A1 (en) * 2017-04-03 2023-02-09 Ts Tech Co., Ltd. Arrangement structure for biological sensors

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JP2019180451A (ja) * 2018-04-02 2019-10-24 テイ・エス テック株式会社 生体センサーの配置構造及びシート
JP7315875B2 (ja) * 2017-04-03 2023-07-27 テイ・エス テック株式会社 車両用シート
JP2018175831A (ja) * 2017-04-03 2018-11-15 テイ・エス テック株式会社 生体センサーの配置構造
JP7057497B2 (ja) * 2018-04-27 2022-04-20 テイ・エス テック株式会社 生体情報検出システム

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JP2009072396A (ja) * 2007-09-21 2009-04-09 Hiroshima Industrial Promotion Organization ベッドマットレスの生体情報検出装置
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WO2010125705A1 (fr) * 2009-04-30 2010-11-04 株式会社村田製作所 Dispositif biocapteur
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JP2008541977A (ja) * 2005-06-07 2008-11-27 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 患者モニタリングシステム及び方法
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