JP2014217707A - Biological information measuring device and biological information measuring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a limb-worn biological information measuring device that can measure pulse pressure and arterial oxygen saturation as well as pulse.SOLUTION: A biological information measuring device includes: first biological information measuring means which includes an attachment belt worn wrapped around either a wrist or an ankle of a user and a pulse sensor and a pulse pressure sensor which are disposed in the attachment belt; second biological information measuring means which includes an SPOsensor for measuring oxygen saturation (hereinafter referred to as "SPO") of human blood and attachment means for attaching the SPOsensor to the tip part of a finger or a toe; control means for controlling the first biological information measuring means and the second biological information measuring means; storage means for storing an output of each sensor: wireless communication means for wirelessly transmitting the output of each sensor; and a power supply including a battery for driving the control means.

Description

  The present invention relates to a biological information measuring device for measuring human biological information (vital sign), and more specifically, can be directly attached to a human limb and has at least pulse, pulse pressure, and arterial oxygen saturation. The present invention relates to a portable biological information measuring device and a biological information measuring system capable of simultaneously measuring.

Conventionally, methods for collecting vital signs continuously and simply have been studied with wearable biological information measuring devices.
However, such a conventional method has been studied focusing on the measurement of electrocardiograms, and is not supposed to collect all the vital information that is really necessary. That is, it is said that there are five types of biometric information required by doctors, in addition to electrocardiogram, including body temperature, pulse, pulse pressure, and arterial oxygen saturation. In particular, it is necessary to continuously measure the pulse rate, pulse pressure, and arterial oxygen saturation, and analyze the data to confirm the disease state / cause. The arterial blood oxygen saturation is a numerical value representing oxygen saturation in blood and is called SPO ₂ and is generally measured by a device called a pulse oximeter.

However, in the past, biometric information collection in intensive care units and hospital rooms at hospitals is done by attaching various types of sensors to the body and collecting them in a wired manner. There is a problem that is large.
In addition, it is necessary for a doctor to collect patient's biological information remotely for treatment at home, observation of health condition, and the like. In such a case, if the sensor is connected by wire, there is a problem that continuous measurement cannot be performed because it interferes with daily life.
In order to cope with such a problem, a limb-mounted and wireless biological information measuring device has been proposed (see, for example, Patent Document 1).

JP 2012-183177 A

However, the biological information measuring device described in Patent Document 1 can measure only the pulse among the above-described ecological information, and does not support measurement of pulse pressure and arterial blood oxygen saturation.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a limb-mounted biological information measuring apparatus capable of measuring pulse pressure and arterial blood oxygen saturation in addition to pulse. To do.

The present invention relates to a limb-mounted biological information measuring apparatus capable of measuring pulse pressure and arterial oxygen saturation in addition to a pulse, and the object of the present invention is to wrap around either a wrist or an ankle of a user A wearing belt, a pulse sensor that measures a pulse that is human biological information, and a pulse pressure sensor that measures a pulse pressure disposed in the wearing belt; Second biological information measurement comprising an SPO ₂ sensor for measuring oxygen saturation in blood (hereinafter referred to as “SPO ₂ ”) and a mounting means for mounting the SPO ₂ sensor on the fingertip of a hand or foot. Means,
Control means for controlling the first biological information measuring means and the second biological information measuring means, storage means for storing the outputs of the sensors, and the control means for wirelessly transmitting the outputs of the sensors. This is achieved by a biological information measuring device comprising: wireless communication means controlled by the control means; and a power source comprising a battery that drives the control means.

  In addition, the present invention provides the above-described biological information measuring device, and a pad-type second biological information measuring device that is attached to and used on the chest of a user, which includes an electrocardiographic sensor and a heart sound sensor including two electrodes. The second object of the present invention is to provide a control means for controlling the measurement by the electrocardiographic sensor and the heart sound sensor, and the electrocardiographic sensor and the heart sound sensor. A storage means for storing the output; a wireless communication means controlled by the control means for wirelessly transmitting the outputs of the electrocardiographic sensor and the heart sound sensor; and a power source comprising a battery for driving the control means. Synchronization that synchronizes data of biological information to be measured by synchronizing the control means of the biological information measuring apparatus and the control means of the second biological information measuring apparatus with a synchronization signal. It is achieved by the biological information measuring system comprising the stages.

According to the biological information measuring apparatus having the above configuration, it is possible to simultaneously and continuously measure the pulse, the pulse pressure, and the arterial oxygen saturation.
In addition, according to the biological information measuring system according to the present invention, the pulse propagation velocity can be easily measured, and the diagnosis of arteriosclerosis can be easily performed.

It is a figure showing a 1st embodiment of a living body information measuring device concerning the present invention. It is a figure which shows 2nd Embodiment of the biological information measuring device which concerns on this invention. It is a figure which shows 3rd Embodiment of the biological information measuring device which concerns on this invention. It is a figure which shows the basic composition of embodiment of a 1st biometric information measurement means. A schematic side view of a piezoelectric element is shown. 1 illustrates an embodiment (schematic side view) of an example of a pressure sensor. It is a figure for demonstrating the measurement principle of a pulse and a pulse pressure. It is a cross-sectional view showing an example of SPO ₂ sensor. It is a diagram for explaining the principle of measurement of the SPO ₂ by the pulse oximeter. 3 is an example of a functional block diagram of the biological information measuring device 1. FIG. It is a figure which shows the mounting state of the pad type | mold biological information measuring device. It is a figure which shows an example of the functional block of the pad type | mold biological information measuring device. It is a figure which shows the specific example of the structure of the pad type | mold biological information measuring device. (A) is a perspective view seen from the top surface, (B) is a perspective view seen from the side surface, and (C) is a view seen from the back surface (side in close contact with the skin). It is a figure which shows the Example of a heart sound sensor. It is a figure for demonstrating the Example which connects the chest pad type | mold biological information measuring device 2 and the limb mounting | wearing type biological information measuring device 1 by radio | wireless communication, and synchronizes with a synchronizing signal and measures a pulse wave propagation time. It is a figure for demonstrating the mechanism for correct | amending the delay time of the signal by the radio | wireless communication from a main | base station to a sub_unit | mobile_unit. It is a figure which shows the mounting aspect of the biological information measuring device in the case of measuring ABI (ankle / wrist blood pressure ratio) and PWV (pulse wave velocity). It is a figure which shows the mounting | wearing aspect of the biological information measuring device in the case of measuring CAVI (cardiac ankle vascular index). It is a figure for demonstrating the significance of measuring body temperature continuously with the temperature sensor built in the breast pad type | mold biological information measuring device. It is a figure which shows the embodiment of the monitoring of the biometric information data in the remote place using the biometric information measurement system which concerns on this invention. It is a figure which shows the external appearance of the box-type charger for charging a secondary battery non-contactingly.

Hereinafter, various embodiments of a biological information measuring apparatus according to the present invention will be described in detail with reference to the drawings.
1A and 1B are diagrams showing a first embodiment of a biological information measuring apparatus according to the present invention, in which FIG. 1A is a type that is worn on a wrist and fingers (SPO ₂ sensor), and FIG. And a type to be worn on the toes (SPO ₂ sensor). Both have the same configuration but different sizes.
In either case, the wrist (ankle) is equipped with a first biological information measuring means 10 in which a pulse sensor and a pulse pressure sensor are built in the wearing belt, and the finger (toe) is a _second sensor composed of an SPO ₂ sensor. The biological information measuring means 20 is attached by the attaching means.

A flexible battery that supplies power to the first biological information measuring means 10 is attached to the wrist (ankle), and a sheet-like shape that supplies power to the second biological information measuring means 20 on the back of the hand (foot). The flexible battery is installed. In particular, since the SPO ₂ sensor consumes electric power, a sheet-like battery with a large area is suitable.
In addition, since the control part which preserve | saves and transmits the measured biometric information outside is arrange | positioned in the 1st biometric information measurement means 10, connection with the 2nd biometric information measurement means 20 is a problem. However, this may be either wired or wireless.
The battery can be either a disposable primary battery or a rechargeable secondary battery. In the present embodiment, a case where a secondary battery is employed will be described as an example.

The first biological information measuring means 10, the second biological information measuring means 20, and the flexible battery are integrally formed on the glove (or socks), and the pulse, preferably, to allow measurement of pulse pressure and SPO _2.
The first biological information measuring means 10 and the second biological information measuring means 20 constitute a biological information measuring apparatus according to the present invention.

FIG. 2 is a diagram showing a second embodiment of the biological information measuring device according to the present invention, in which the second biological information measuring means 20 composed of the SPO ₂ sensor is mounted on the back of the foot (the part close to the finger) by the wearing means. ) Is the same as FIG. 1B except that it is mounted, and a description thereof will be omitted.
The first biological information measuring unit 10, the second biological information measurement unit 20 and the flexible battery integrally formed on socks, simply attaching the sock to the foot, so the pulse, the pulse pressure and SPO ₂ can be measured It is preferable to do this.

FIG. 3 is a diagram showing a third embodiment of the biological information measuring apparatus according to the present invention, in which a pulse sensor, a pulse pressure sensor, and an SPO ₂ sensor are arranged in a wearing belt. Measurement of pulse, pulse pressure, and SPO ₂ is possible by measuring the dorsal artery just by wearing it on the back. In addition, in FIG. 3, although the sheet-like flexible battery with which an instep is mounted | worn is not illustrated, it cannot be overemphasized that it may install in piles on a mounting belt.

  4 (a) and 4 (b) are diagrams showing a basic configuration of an embodiment of the first biological information measuring means. 4A is a side view of the first biological information measuring means, and FIG. 4B is a cross-sectional view taken along line AA in FIG. 4A.

  The first biological information measuring means 10 of this embodiment includes a mounting belt 11, a piezoelectric element 101, and a pressure sensor 102. The piezoelectric element 101 and the pressure sensor 102 are built in the mounting belt 11. The first biological information measuring unit 10 is not shown in FIGS. 4A and 4B, but as will be described later, the control unit 103, the storage unit 104, the acceleration sensor 105, the wireless device 106, and the antenna 107. And an information processing unit 108, a battery 109a, and a charging circuit 110 (see FIG. 10 described later). The piezoelectric element 101 corresponds to a pulse sensor, and the pressure sensor 102 corresponds to a pulse pressure sensor. Needless to say, when the battery 109a is a primary battery, the charging circuit 110 is unnecessary.

The mounting belt 11 includes a ring-shaped (tubular) first belt portion 11a and a ring-shaped second belt portion 11b provided on the inner peripheral side thereof. Both the first belt portion 11a and the second belt portion 11b are formed of a material having elasticity and flexibility such as rubber and cloth rubber.
In addition, in this embodiment, since the ease of generating a pulse changes according to a user, the mounting belt 11 which has the elastic force suitable for a user is used. Specifically, when the first biological information measuring means 10 is attached, the forming material, diameter, width, and thickness of the attachment belt 11 are appropriately selected so that an optimum tightening pressure is obtained for the user. .

  For example, if the user is difficult to output a pulse, the wearing belt 11 having a relatively high tightening pressure (for example, about 30 to 60 hPa) is used. If the general user is likely to output a pulse, the tightening pressure is relatively high. A small (for example, about 20 to 30 hPa) wearing belt 11 is used. However, if the tightening pressure of the mounting belt 11 is too strong, the user may feel uncomfortable or blood flow may deteriorate. Therefore, in consideration of these symptoms and pulse detection accuracy, The forming material, diameter, width and thickness are appropriately selected, and the fastening pressure of the mounting belt 11 is adjusted.

  The piezoelectric element 101 is composed of a sheet-like piezoelectric element that extends in the circumferential direction (winding direction) of the mounting belt 11. Here, FIG. 5 shows a schematic side view of the piezoelectric element 101. The piezoelectric element 101 includes a piezoelectric sheet 101a and an upper electrode 101b and a lower electrode 101c formed on the upper and lower surfaces, respectively.

  In the present embodiment, when the dimension (shape) of the piezoelectric sheet 101a contracts or expands in the extending direction (in-plane direction of the piezoelectric element 101), a voltage (electric field) is applied in the thickness direction of the piezoelectric sheet 101a. The piezoelectric material is generated. In other words, in the present embodiment, the piezoelectric sheet 101a whose deformation mode is the d31 mode orthogonal to the voltage generation direction and the dimension deformation direction is used, and the pulse is measured using this deformation characteristic. The pulse measurement principle using this deformation mode will be described later.

  As a material for forming the piezoelectric sheet 101a having the above-described characteristics, a polymer piezoelectric film can be used. For example, a ferroelectric material such as polyvinylidene fluoride (PVDF) can be used. For example, when PVDF is used as the material for forming the piezoelectric sheet 101a, the main deformation mode can be adjusted to the d31 mode by performing a predetermined polarization process on the uniaxially stretched film of PVDF. In addition, the thickness of the piezoelectric sheet 101a is appropriately set according to, for example, required pulse measurement accuracy, and can be, for example, about several tens to 100 μm.

  The upper electrode 101b and the lower electrode 101c are formed over substantially the entire upper and lower surfaces of the piezoelectric sheet 101a, respectively. For the upper electrode 101b and the lower electrode 101c, a metal material such as silver (Ag) can be used, for example. However, the present invention is not limited to this, and any conductive material can be used as a material for forming each electrode, and is appropriately selected according to, for example, the use and use environment.

  The upper electrode 101b and the lower electrode 101c are connected to a control unit 103 (described later) built in the mounting belt 11, and a voltage signal generated in the piezoelectric sheet 101a during pulse measurement is transmitted via the upper electrode 101b and the lower electrode 101c. It is output to the control unit 103.

  Further, in the example shown in FIG. 4B, the extending length of the piezoelectric element 101 is about 1/3 of the circumferential length of the mounting belt 11, but the present invention is not limited to this. The extension length of the piezoelectric element 101 is appropriately set according to, for example, the required pulse detection accuracy. Furthermore, since the above-described functional blocks (for example, a control unit, an information processing unit, an acceleration sensor, a wireless device, etc.) are provided in the mounting belt 11, the extending length of the piezoelectric element 101 is determined by the functional blocks. It is set as appropriate in consideration of the occupied area and the like.

  FIG. 6 shows an embodiment (schematic side view) of an example of the pressure sensor 102 for detecting the pulse pressure of the user. FIG. 6A shows a state where no pressure is applied. Briefly explaining the structure, an insulating spacer is arranged between the electrode and the carbon sheet, and if no pressure is applied, the electrode and the carbon sheet are separated from each other. , Simply called resistance value) becomes infinite. Next, FIG. 6B shows a case where pressure is applied along the upper surface of the electrode, and the resistance value decreases when the electrode and the carbon sheet come into contact with each other by the pressure.

FIG. 6C shows a case where a larger pressure is applied. Since the contact area is increased as compared with the case of FIG. 6B, the resistance value is further reduced. If the relationship between the applied pressure (absolute value) and the resistance value at that time is measured and stored in advance using such properties, the attachment belt 11 can be measured by measuring the resistance value of the pressure sensor 102. Can be detected. Also, the pulse pressure is obtained by converting the resistance value change (maximum value-minimum value of resistance value) during one pulse (one cycle) of the pulse into a pressure value. Needless to say, instead of detecting the resistance value, a constant current may be supplied to the pressure sensor 102 to detect the voltage, or a constant voltage may be applied to detect the current.
Further, as an embodiment of the pressure sensor 102, a pressure sensor using a polymer pressure film element can be used.

  In this embodiment, the piezoelectric element 101 and the pressure sensor 102 are sandwiched between the first belt portion 1a and the second belt portion 11b of the mounting belt 11 as shown in FIG. 102 is fixed in the mounting belt 11. In FIG. 4B, in order to clarify the overall shape of the first biological information measuring means 10 and the mounting positions of the piezoelectric element 101 and the pressure sensor 102 in the mounting belt 11, the piezoelectric element 101 and the pressure are shown. It is described that there is a gap in the region between the first belt portion 11a and the second belt portion 11b where the sensor 102 or the like is not disposed. However, actually, in this region, the first belt portion 11a and the second belt portion 11b are in close contact.

  In the present embodiment, the configuration in which the piezoelectric element 101, the pressure sensor 102, and other functional blocks are built in such a manner as to be sandwiched inside the mounting belt 11 is described, but the present invention is not limited to this. For example, the piezoelectric element 101, the pressure sensor 102, and other functional blocks may be arranged on the outer peripheral side or inner peripheral side surface of the mounting belt 11. In this case, the mounting belt 11 can be configured by only one of the first belt portion 11a and the second belt portion 11b described above, and the configuration becomes simpler.

Next, the measurement principle of the pulse and pulse pressure in the first biological information measuring means 10 of the biological information measuring apparatus according to the present invention will be described with reference to FIG.
When a pulse is generated in a state where the wearing belt of the first biological information measuring means 10 is attached to any of the four limbs, the first biological information measuring means 10 is in a radial direction with respect to the central axis CX of the opening (see FIG. 7 in the direction of arrow A1). As a result, the piezoelectric element 101 in the first biological information measuring means 10 is pulled and extended in the circumferential direction of the mounting belt 11 (in the direction of arrow A2 in FIG. 7). In this embodiment, the piezoelectric sheet used for the piezoelectric element 101 is formed of a piezoelectric material that generates a voltage (electric field) in the thickness direction of the piezoelectric sheet when contracted or expanded in the extending direction. Therefore, when the piezoelectric element 101 expands in the circumferential direction of the mounting belt 11 (the direction of arrow A2 in FIG. 7), a voltage is generated in the thickness direction of the piezoelectric element 101 (the voltage increases). At this time, since the pressure applied to the pressure sensor 102 increases, the resistance value of the pressure sensor changes (decreases), and the absolute value of the pressure corresponding thereto is measured.

  Thereafter, when the pulse disappears, the piezoelectric element 101 and the pressure sensor 102 of the biological information measuring apparatus return to their original shapes, the voltage in the thickness direction of the piezoelectric element 101 decreases, and the resistance value of the pressure sensor 102 increases. In a state where the biological information measuring device is attached to any of the four limbs, the voltage fluctuation in the thickness direction of the piezoelectric element 101 and the output signal change of the pressure sensor 102 are repeated in the cycle of the pulse.

  That is, in the biological information measuring apparatus of the present embodiment, a voltage signal having a waveform in which the voltage has a maximum value (peak) in a cycle corresponding to the pulse cycle is output from the piezoelectric element 101. At the same time, an output signal from the pressure sensor 102 is also acquired. In this embodiment, the pulse and the pulse pressure are measured in this way.

Next, the SPO ₂ sensor 20 as the second biological information measuring means will be described. FIG. 8 is a cross-sectional view showing an example of the SPO ₂ sensor 20. As shown in FIG. 8, the SPO ₂ sensor 20 receives light that has passed through a light emitting portion composed of red (R) and infrared (IR) light emitters and a fingertip irradiated from the light emitting portion. A calculation unit for calculating and outputting oxygen saturation in blood, that is, SPO ₂ based on the ratio between the irradiated light amount and the received light amount, and mounting means for mounting on the fingertips of the limbs Prepare. Commercially available pulse oximeters are available.

FIG. 9 is a diagram for explaining the principle of SPO ₂ measurement using a pulse oximeter.
Hemoglobin turns bright red when combined with oxygen. The pulse oximeter looks at the redness of arterial blood and looks at the oxygen saturation (the ratio of hemoglobin bound to oxygen).
Hemoglobin (HbO ₂ ) associated with oxygen has a red color because it passes only the red color without much absorption. That is, the red color absorbance is low.
On the other hand, hemoglobin (Hb) from which oxygen has been released becomes a blackish color because it absorbs light well.

The left side of FIG. 9 shows a case where hemoglobin in blood is combined with oxygen. When red light (R) is applied to the fingertip, if more hemoglobin and oxygen are bound, most red light passes through the finger without being absorbed, and the amount of red light received by the sensor increases. On the other hand, infrared light (IR) passes through blood (that is, not absorbed) with little change, whether or not hemoglobin and oxygen are associated.
On the other hand, when hemoglobin releases oxygen (right side of FIG. 9), the amount of red light (R) transmitted through the finger decreases, and infrared light (IR) does not change much.
That is, if the ratio of R / IR received by the sensor is known, that is, the oxygen saturation (SPO ₂ ) can be known. Actually, the relationship between the ratio of the fluctuation component of the transmitted light quantity of red light (R) and infrared light (IR) and the SPO ₂ value varies depending on the R and IR LED wavelengths used. The relationship between the two is called a calibration constant. The calibration constant is determined by experimentally determining the correlation between the pulse oximeter and SAO ₂ (arterial blood oxygen saturation) obtained by simultaneous blood sampling.

FIG. 10 is an example of a functional block diagram of the biological information measuring apparatus 1 including the first biological information measuring means 10 and the second biological information measuring means 20.
10, the biological information measuring apparatus 1 includes the above-described piezoelectric element 101 and pressure sensor 102, control unit 103, storage unit 104, acceleration sensor 105, wireless device 106, antenna 107, information processing unit 108, battery 109a, and charging. A first biological information measuring means 10 including a circuit 110a and a second biological information measuring means 20 including an SPO ₂ sensor, a battery 109b, and a charging circuit 110b are provided.

Note that the piezoelectric element 101, the pressure sensor 102, the control unit 103, the storage unit 104, the acceleration sensor 105, the wireless device 106, the antenna 107, and the information processing unit 108 are attached in the mounting belt 11. The SPO ₂ sensor is attached to the fingertips of the limbs or the instep. The configuration and function of each part are as follows.
Since the configurations and functions of the piezoelectric element 101, the pressure sensor 102, and the SPO ₂ sensor have already been described, description thereof will be omitted.

The control unit 103 is a control device and an arithmetic processing device that control the overall operation of the biological information measuring device 1. Therefore, the control unit 103 includes a CPU that realizes the function of each unit by a predetermined control program, a ROM that stores a predetermined program and the like, and a RAM that is a work area.
The control unit 103 performs acquisition, analysis, and output operations of pulse, pulse pressure, and SPO ₂ measurement data. Then, it has a function of transmitting acquired and / or analyzed pulse, pulse pressure, SPO ₂ data, and the like to an external information processing apparatus (not shown) via a communication device including the wireless device 106 and the antenna 107.

The pulse, pulse pressure, and SPO ₂ data are obtained by obtaining a voltage signal generated by the piezoelectric element 101, an output signal (resistance value, voltage or current) detected by the pressure sensor 102, and data of the SPO ₂ sensor ( It may be transmitted to an external information processing apparatus (in real time), or may be temporarily stored in the storage unit 104 and transmitted periodically.
When transmitting the acquired pulse, pulse pressure, and SPO ₂ data to an external information processing apparatus, the data analysis of the above-described pulse, pulse pressure, and SPO ₂ data may be performed by the external information processing apparatus. .

The storage unit 104 is connected to the control unit 103 and is a pulse measurement data acquired by the control unit 103, data that records in advance the relationship between the resistance value and pressure (absolute value) of the pressure sensor 102, and an SPO ₂ sensor. The acquired oxygen saturation data is stored. Note that the storage unit 104 is configured by, for example, a nonvolatile semiconductor memory such as a flash memory.

  The acceleration sensor 105 is constituted by a three-dimensional acceleration sensor, and mainly has a function of detecting a user's movement. The acceleration sensor 105 is connected to the control unit 103 and outputs a detected signal (analog signal) to the control unit 103. This detection signal is used to determine whether or not the user is in a stationary state (a state where the attached limb is not moving). Further, in this embodiment, by continuously monitoring the detection signal of the acceleration sensor 105, it is possible to monitor time-series changes in the user's exercise amount and exercise intensity.

  As the acceleration sensor 105, a three-dimensional acceleration sensor that has a precision that can detect whether or not the user is in a stationary state and has a size and a weight that can be embedded in the mounting belt 11. Any acceleration sensor can be used.

When the wireless device 106 wirelessly transmits pulse, pulse pressure, SPO ₂ measurement data, and the like to an external information processing apparatus (not shown) such as a personal computer, for example, using a method such as Bluetooth (registered trademark). For example, a predetermined process such as a modulation process is performed on the measurement data. The wireless device 106 is connected to the antenna 107 and transmits the pulse, pulse pressure, SPO ₂ measurement data, and the like on which predetermined processing has been performed to the external information processing apparatus via the antenna 107. The antenna 107 is preferably a planar antenna.

The information processing unit 108 calculates the cardiac work by multiplying the pulse measured by the piezoelectric element 101 by the pulse pressure measured by the pressure sensor 102, or uses time data measured by a clock function (not shown), Resting time (ex. 1 minute, 3 minutes, 5 minutes, 10 minutes, 30 minutes, 60 minutes, etc.) It calculates the average pulse, average pulse pressure, average pulse wave pattern, etc. of the segment time from the pulse wave extraction ratio within the rest time, the average interval and amplitude of the extracted pulse wave, and the average pulse wave time series pattern. Or a software such as a program. Further, the average pulse and the average pulse pressure may be used to calculate the cardiac work.
Note that the information processing unit 108 may calculate (data analysis) an average value, maximum value, minimum value, data acquisition rate, and the like of the pulse during a predetermined period from the acquired pulse measurement data.

The battery 109a is a drive power source for the control unit 103, and is composed of, for example, a sheet-like flexible battery and is used by being wound around a wrist or an ankle. Charging is preferably performed using radio waves. The charging circuit 110 and the charging device will be described later. The battery 109b serves as an auxiliary power source for the SPO ₂ sensor, and is preferably composed of a sheet-like flexible battery with a large area for securing a large capacity of power.

The communication between the SPO ₂ sensor 20 and the control unit 103 may be wired or wireless. However, in the case of wireless, it is necessary to provide a short-distance wireless communication device inside the SPO ₂ sensor. For example, the above-described Bluetooth (registered trademark) method can be adopted.

Furthermore, since the measurement data input from the piezoelectric element 101, the pressure sensor 102, the SPO ₂ sensor 20, and the acceleration sensor 105 to the control unit 103 is analog data, the control unit 103 converts the input analog data into digital data. AD (Analog-to-Digital) conversion function. However, when the input analog data is directly transmitted to an external information processing apparatus or the like, the AD conversion function may not be provided.

  In the present embodiment, during the wearing period of the biological information measuring apparatus 1, the control unit 103 may acquire a voltage signal (measurement data) generated by the piezoelectric element 101 and an output signal from the pressure sensor 102 continuously. However, if the user performs any action (eg, exercise, conversation, etc.) during pulse and pulse pressure measurement, only the pulse and pulse pressure signal components are included in the voltage signal generated by the piezoelectric element 101 and the output signal from the pressure sensor 102. In addition, various noise components are included, and it is difficult to accurately detect the pulse and the pulse pressure signal component.

  Therefore, in the present embodiment, the control unit 103 determines whether or not the user is in a stationary state (a state where the attached limb is not moving) based on the output signal of the acceleration sensor 105, Only when it is determined to be in a stationary state, the voltage signal from the piezoelectric element 101 and the output signal from the pressure sensor 102 are acquired. In this case, noise components included in the acquired voltage signal and the output signal from the pressure sensor 102 are reduced, and the pulse and the pulse pressure signal component can be detected with high accuracy.

  In ordinary daily life, there is generally a stationary state of several seconds or more in 3 minutes. Therefore, in the biological information measuring apparatus 1 of the present embodiment, the control unit 103 automatically acquires the voltage signal from the piezoelectric element 101 and the output signal from the pressure sensor 102 only when the user is in a stationary state. Statistical measurement data (average, maximum, minimum, data collection rate) of 480 segments of pulses per day can be obtained. In this case, the data of each section can be continuously acquired, the amount of data to be acquired is reduced, and the processing amount of data analysis can be reduced.

  In addition, when acquiring the voltage signal from the piezoelectric element 101 and the output signal from the pressure sensor 102 continuously during the mounting period of the biological information measuring apparatus 1, the control unit 103 simultaneously performs the operation of the acceleration sensor 105 during the mounting period. It is preferable to obtain the detection signal continuously. In this case, it is possible to specify the period in a stationary state from the time-series characteristics of the acquired detection signal of the acceleration sensor 105, and from the time-series data of the voltage signal acquired from the piezoelectric element 101 and the output signal from the pressure sensor 102. Data of the specified quiescent period can be extracted to analyze pulse and pulse pressure data. Also in this case, noise components included in the voltage signal from the piezoelectric element 101 and the output signal from the pressure sensor 102 used for analysis are reduced, and the pulse and the pulse pressure signal component can be detected with high accuracy.

  Furthermore, in the biological information measuring apparatus 1 according to the present embodiment, the pulse is detected based on the characteristics of the voltage signal in the thickness direction of the piezoelectric element 101 that changes due to expansion and contraction in the extending direction of the piezoelectric element 101 (the circumferential direction of the mounting belt 11). . Therefore, in this embodiment, even if the piezoelectric element 101 is not disposed on the artery (even if no pressure is directly applied from the blood vessel), the pulse can be accurately measured. That is, it is not necessary to align the piezoelectric element 101 when the biological information measuring device 1 is worn, and even if the biological information measuring device 1 is displaced during pulse measurement, the pulse can be reliably measured.

  In addition, since the biological information measuring apparatus 1 of the present embodiment has a simple configuration in which the wearing belt 11 is simply wrapped around one of the user's limbs, the biological information measurement is performed without giving the user unpleasantness or discomfort. The apparatus 1 can be continuously worn for a longer period. That is, in the present embodiment, it is possible to provide the biological information measuring apparatus 1 that is extremely excellent in portability.

  Next, FIG. 11 is a diagram showing a mounting state of the second biological information measuring device 2 which is another element constituting the biological information measuring system according to the present invention together with the biological information measuring device 1. The second biological information measuring device 2 is a pad-type biological information measuring device that is used by being attached to the chest. Hereinafter, the second biological information measuring device 2 is referred to as a “pad type biological information measuring device”.

FIG. 12 is a diagram illustrating an example of functional blocks of the pad-type biological information measuring device 2.
In FIG. 12, the pad-type biological information measuring device 2 includes an electrocardiographic sensor (electrode) 201, a heart sound sensor 202, a signal amplification unit 203, a temperature sensor 204, a control unit 205, a storage unit 206, an information processing unit 207, and a wireless transmission / reception unit. 208, a battery 209, and a charging circuit 210. Needless to say, when the battery 209 is a primary battery, the charging circuit 210 is unnecessary.
Among these, the electrocardiographic sensor 201 is composed of two electrodes and has a function of continuously measuring an electrocardiographic waveform by a voltage signal generated between the two electrodes.
The heart sound sensor 202 includes a sound collecting element that collects heart sounds, and has a function of converting heart sounds generated in the heart into electrical signals. This makes it possible to continuously measure the heart sound waveform.

The signal amplifying unit 203 has a function of amplifying an electrocardiographic sensor signal and a heart sound sensor signal, which are weak signals, and inputting them to the control unit 205.
The temperature sensor 204 has a function of measuring body temperature. Since the sheet-like sensor measured on the surface can be measured stably, it is preferable. More accurate measurement is possible by combining an infrared sensor, thermistor, etc.
The control unit 205 is a control device and an arithmetic processing device that control the overall operation of the pad-type biological information measuring device 2. Therefore, the control unit 205 includes a CPU that realizes the function of each unit by a predetermined control program, a ROM that stores a predetermined program and the like, and a RAM that is a work area.
The control unit 205 acquires, analyzes, and outputs an electrocardiogram waveform, an electrocardiogram, and body temperature measurement data. A function of transmitting the acquired and / or analyzed electrocardiographic waveform, ECG data, body temperature data, and the like to an external information processing apparatus (not shown) via the wireless transmission / reception unit 208 is provided.

The storage unit 206 is connected to the control unit 205 and stores the electrocardiographic sensor measurement data, the heart sound sensor measurement data, and the body temperature data measured by the temperature sensor acquired by the control unit 205.
Note that the storage unit 206 is configured by, for example, a nonvolatile semiconductor memory such as a flash memory.
Further, the information processing unit 207, based on the electrocardiogram data and the heart sound data, and the pulse wave data and the pulse pressure data acquired from the biological information measuring apparatus 1, will be described later, CAVI (heart ankle vascular index), PWV (pulse wave). (Propagation speed) or ABI (ankle-wrist blood pressure ratio) or the like.
The information processing unit 207 may be a circuit configured by hardware, or may be software such as a program.

The wireless transmission / reception unit 208 receives pulse, pulse pressure, SPO ₂ measurement data, and the like from the belt-type biological information measurement device 1, and transmits electrocardiogram data, heart sound data, and body temperature data to an external device (a card type described later). And a function of wirelessly transmitting to an information processing device such as a transceiver or a smart terminal. Since it is a short-distance communication, for example, the above-described Bluetooth (registered trademark) system can be adopted.

  The battery 209 is a driving power source for the control unit 205, and is configured by, for example, a sheet-like battery and embedded in the apparatus. The battery 209 may be provided separately for the wireless transmission / reception unit 209 in addition to driving the control unit 205. By separating the power source, it is possible to prevent the influence of noise generated in the wireless transmission / reception unit 208 from reaching the control unit 205.

FIG. 13 is a diagram illustrating a specific example of the structure of the pad-type biological information measuring device 2. (A) is a perspective view seen from the top surface, and (B) is a perspective view seen from the side surface. Electrocardiogram electrodes 201 are attached to both ends of the pad, and a heart sound sensor 202 is arranged between them. By using the surface of the pad, a substrate in which the sheet battery 209, the sheet temperature sensor 204, the control unit 205, and the wireless transmission / reception unit 208 are integrally arranged as an integrated circuit is formed in layers. The temperature sensor 204 is disposed at a position not affected by the temperature of the battery and the substrate.
In addition, the back surface is adhered to the body with an adhesive sheet. For example, as shown in (C) (a diagram viewed from the back surface (the side that is in close contact with the skin)), conductive adhesion that also serves as an electrocardiographic electrode as the electrocardiographic sensor 201 If the material is placed on both ends and an insulating adhesive sheet is sandwiched between them, the sheet can be evenly adhered to the back surface and firmly adhered to the skin, allowing more accurate measurement. The distance between the two electrodes is preferably 80 mm or more. Each element is assembled into a pad shape by a mold member or the like.

FIG. 14 is a diagram illustrating an example of the heart sound sensor 202. (A) is a front view, which has a diaphragm that collects and vibrates a heart sound, transmits the vibration to the coil, and a vibration / electric conversion unit that includes a magnet and a coil.
(B) is a side view of the heart sound sensor 202 and shows a skin contact type. Moreover, (C) is a side view of the heart sound sensor 202 and shows a mortar type that can collect sound like a stethoscope. In any case, the sound pressure is measured by absorbing the sound pressure in the diaphragm, transmitting the vibration to the coil, and measuring a voltage signal generated when the coil vibrates in the vicinity of the permanent magnet (magnet). This heart sound sensor can be replaced with a thin and small flat speaker.

  FIG. 15 shows a measurement of pulse wave propagation time by connecting a chest pad type biological information measuring device 2 (master unit) and a limb-mounted biological information measuring device 1 (slave unit) by wireless communication and synchronizing them with a synchronization signal. It is a figure for demonstrating the case to do. For convenience, the limb-mounted biological information measuring device 1 attached to the wrist is referred to as a child device 1, and the limb-mounted biological information measuring device 1 attached to the ankle is referred to as a child device 2 for convenience.

In FIG. 15, in order to measure the time for the pulse wave generated in the heart to reach the wrist and ankle, first, a synchronization signal instructing the start of measurement is transmitted from the parent device to the child device 1 and the child device 2. At the same time, the master unit also measures the time C until the peak of the pulse wave.
The subunit | mobile_unit 1 which received the synchronizing signal measures the time X1 to the peak of a pulse wave, and the subunit | mobile_unit 2 which received the synchronizing signal measures the time X2 to the peak of a pulse wave, respectively.
Then, the relative pulse wave propagation time from the heart to the wrist is (X1-C), and the relative pulse wave propagation time from the heart to the ankle is (X2-C).
However, since the synchronization signal transmitted from the master unit to each slave unit has a delay time due to wireless communication, by correcting this amount (referred to as d1 and d2, respectively), absolute pulse wave propagation Time is required.
That is,
Absolute pulse wave propagation time from heart to wrist = d1 + X1-C
-Absolute pulse wave propagation time from heart to ankle = d2 + X2-C
It becomes.
Next, a method for obtaining and correcting the delay times (d1, d2) will be described.

FIG. 16 is a diagram for explaining a mechanism for correcting a signal delay time due to wireless communication from a parent device to a child device. This will be described with reference to FIG.
First, the correction tool (calibrator) and the master unit, the slave unit 1 and the slave unit 2 are connected by wire or light. This is to prevent signal delay due to communication.
Next, the following procedure is performed.
(1) A start signal is transmitted from the correction tool to the master unit.
(2) The master unit that has received the start signal sends a synchronization signal to the correction tool and simultaneously sends it to each slave unit wirelessly.
(3) Each slave unit returns a synchronization signal to the correction tool when receiving the synchronization signal.
(4) signal arrival time (t ₀₎ from the correction tool is the master _unit, signal arrival time from the child machine 1 (t ₁₎ to measure the signal arrival time (t ₂₎ from the slave unit 2.
As a result, the difference between _{t 1} and _{t 0} is the difference between d1 next, _{t 2} and _{t 0} is d2.
That is, d1 = t ₁ −t ₀ and d2 = t ₂ −t ₀ . These d1 and d2 may be measured at the time of shipment from the factory and stored in each slave unit or stored in the master unit.

Next, a method for measuring an index relating to a blood vessel using a combination of the biological information measuring device 1 (limb mounting type) or the biological information measuring device 1 and the biological information measuring device 2 (chest pad type) will be described.
FIG. 17A shows a wearing mode of the biological information measuring device in the case of measuring ABI (ankle / wrist blood pressure ratio). ABI is one of the indicators for examining the degree of progression of arteriosclerosis, and this makes it possible to determine the degree of clogging of blood vessels.
Usually, when the pulse pressure of both wrists and both ankles is measured while lying down, the value of the ankle is slightly higher. However, when a blood vessel is clogged, the pulse pressure downstream from the blood vessel decreases, and the ratio of ankle pulse pressure / wrist pulse pressure (ABI) decreases. When ABI is 0.9 or less, it is determined that the artery is stenotic, and the progression of arteriosclerosis is suspected. A decrease in ABI indicates that there is arteriosclerosis throughout the body, not just the lower limb arteries.

Specifically, the pulse pressure data measured by the biological information measuring device (child device 1) worn on the wrist and the pulse pressure data measured by the biological information measuring device (child device 2) worn on the ankle are wirelessly connected to the parent device. Alternatively, it is received by an external information processing apparatus (not shown), and the ABI is calculated by dividing the pulse pressure of the ankle by the pulse pressure of the wrist. Alternatively, data may be sent from the slave unit 2 to the slave unit 1, calculated in the slave unit 1, and the result transmitted to the outside.
This is because it is possible to determine that there is a clog in the blood vessel on either side if there is a difference between the left and right by performing on the left and right wrist-ankle.

FIG. 17B shows an aspect in the case of measuring PWV (pulse wave propagation velocity). PWV is used as an index for determining the degree of arteriosclerosis (arterial hardness) by calculating the pulse wave propagation velocity from the pulse waves of the arm (wrist) and ankle.
Specifically, the distance between the aortic valve opening and the ankle (La) and the distance between the aortic valve opening and the wrist (Lb) are obtained by an estimation formula obtained from the height, and the obtained (La−Lb) is calculated between the wrist and the ankle. It is obtained by dividing by the pulse wave deviation time (Δt).
Δt can be obtained by subtracting the absolute pulse wave propagation time (d1 + X1-C) of the child device 1 from the absolute pulse wave propagation time (d2 + X2-C) of the child device 2 in FIG.
That is, Δt = (X2−X1) + (d2−d1).
Therefore, PWV = (La−Lb) / (X2−X1 + d2−d1)
It becomes. As arteriosclerosis progresses, PWV tends to increase. Similar to (A), it is easy to find an abnormality by obtaining and comparing the left and right sides.

  FIG. 18 shows how the biological information measuring device is worn when CAVI (cardiac ankle vascular index) is measured. CAVI is an index for determining the arteriosclerosis by calculating the pulse wave propagation velocity from the heart sound and the pulse wave of the ankle, and has a feature independent of blood pressure. The higher the pulse wave velocity, the higher the risk of myocardial infarction and cerebral infarction. When the value exceeds 9, about half of the cases have developed arteriosclerosis in the cerebral artery or coronary artery.

The measurement method is that a chest pad type biological information measuring device 2 (master device) for measuring electrocardiograms and heart sounds is attached to the chest, and a belt type biological information measuring device 1 (slave device) is attached to the wrist and ankle, respectively. Wear.
Then, in accordance with the transmission of the synchronization signal from the parent device, the electrocardiogram and the electrocardiogram are measured on the parent device side, and the pulse wave waveform is measured on the child device side.

As a result, assuming that a waveform as shown in FIG. 18 is obtained, a method for obtaining CAVI will be described.
Since CAVI is the pulse wave propagation speed from the aortic valve opening to the ankle, the distance L between the aortic valve opening and the ankle is divided by the pulse wave propagation time T from the aortic valve opening to the ankle. Desired.
The distance L between the aortic valve opening and the ankle can be selected either automatically calculated or measured based on the height, but the automatic calculation method has less variation.

Next, the pulse wave propagation time T from the aortic valve opening to the ankle is obtained by the sum of the time tb ′ reaching the wrist after the opening of the aortic valve and the pulse wave propagation time difference Δt between the wrist part and the ankle part. Since the first heart sound is small, tb ′ cannot be obtained directly. Therefore, the time tb from the time when the aortic valve is closed (second heart sound) to the notch on the wrist pulse wave is used instead. That is, tb ′ = tb. Note that Δt is the same as Δt when the above PWV is obtained.
As a result, T = tb + Δt, and CAVI is obtained by L / T. This calculation may be performed by sending the pulse wave data measured by the slave unit to the master unit wirelessly and by the information processing unit 207 in the master unit, or performing electrocardiogram and heart sound data from the master unit and pulse data from the slave unit. The wave data may be sent wirelessly to an external information processing apparatus and calculated by an external apparatus.

FIG. 19 is a diagram for explaining the significance of continuously measuring the body temperature with the temperature sensor built in the chest pad type biological information measuring device 2.
That is, if a continuous change in body temperature is measured from the beginning of illness, a temperature curve as shown in FIG. 19 is obtained, and symptoms can be estimated.
As shown in FIG. 19, the body temperature gradually rises from the beginning of illness (rise phase). During this period, the body temperature continues to rise because the heat produced is greater than the heat dissipated.
When the extreme is reached after more than a dozen hours, it rises and falls (the heat produced is equal to the heat dissipated). Symptoms can be estimated to some extent by temperature changes at extreme values.

Thereafter, when the heat produced is less than the heat dissipated, the heat begins to fall and returns to normal after about 50 hours. Thus, it can be estimated that the patient recovered from the disease.
If this body temperature data is stored in the storage unit 206 in the chest pad type biological information measuring device 2, the doctor can make a diagnosis at a later date by looking at the data, or in real time via a network 5 to be described later. You can also send it to a doctor who has a doctor.

FIG. 20 is a diagram showing an embodiment of monitoring of biological information data at a remote place using the biological information measuring system according to the present invention.
In the figure, reference numeral 3 denotes a card-type transceiver connected to the belt-type biological information measuring device 1 and the chest pad-type biological information measuring device 2 by wireless communication.
The card-type transceiver 3 performs wireless communication between the biological information measuring device 1 and the biological information measuring device 2 and has a function of transmitting the acquired biological information data to the outside via a smart terminal 4 described later. A transmission / reception unit 301, a control unit 302 that controls the wireless transmission / reception unit 301, and a power source 303 are provided. Moreover, you may provide suitably the memory | storage part 304 which memorize | stores the data received from the biometric information measuring device 1 and the biometric information measuring device 2, and the operation display part 305 for a user performing operation for transmission / reception. The card-type transceiver 3 may be worn by the user, or may be installed, for example, in a hospital or home bed.

  The smart terminal 4 has a function of performing wireless communication with the card-type transceiver 3 and transmitting data to a doctor's computer 6 or the like via a network 5 (for example, the Internet). The smart terminal is preferably a so-called smartphone or PDA (Personal Digital Assistants) that can be directly connected to the network 5 wirelessly, but is not limited thereto, and may be a personal computer connected to a gateway for connection to the network. In short, any information device can be used as long as it can wirelessly communicate with the card-type transceiver 3 and is connected to the network.

FIG. 21 shows a box-type charger for charging a battery (in the case of a secondary battery) built in the biological information measuring device 1 (belt type) and the biological information measuring device 2 (pad type) in a non-contact manner. FIG.
When the biometric information measuring device 1 (belt type) and the biometric information measuring device 2 (pad type) are complicated in shape and difficult to charge by non-contact electromagnetic induction, a box-type charger using electric power transmission technology using radio waves Is used. Since it is a box type, radio waves hardly leak out of the box.
The charging circuits 110 and 210 described above apply power transmission technology using radio waves, and rectify an antenna that receives a microwave generated in a box-type charger or an external radio wave generator. A circuit is provided, and by rectifying the microwave received by the antenna, the energy of the radio wave is converted into a direct current and the battery is charged.
Note that an antenna that receives radio waves may also be used as a data transmission / reception antenna.
Further, the box-type charger is provided with a sterilizing lamp (for example, an ultraviolet lamp), and sterilization is performed simultaneously when charging the biological information measuring device 1 (belt type) and the biological information measuring device 2 (pad type). May be.

Although the description of the embodiment is completed as described above, in the present invention, the specific configuration of each device, the content of processing, and the like are not limited to those described in the embodiment. Modifications can be made without departing from the spirit of the present invention.
Furthermore, it is needless to say that the embodiments and operation configurations described above can be arbitrarily combined and implemented as long as they do not contradict each other.

1: biological information measuring device (belt type), 2: second biological information measuring device (pad type), 3: card type transceiver, 5: network, 10: first biological information measuring means, 20: second Biological information measuring means (SPO ₂ sensor), 101: piezoelectric element (pulse sensor), 102: pressure sensor (pulse pressure sensor), 103: control unit, 104: storage unit, 105: acceleration sensor, 106: wireless device, 109: battery, 110: charging circuit, 201: electrocardiographic sensor, 202: heart sound sensor, 204: temperature sensor, 205: control unit, 206: storage unit, 208: wireless transmission / reception unit, 209: battery, 210: charging circuit

Claims (13)

A mounting belt that is wound around either the wrist or ankle of the user, a pulse sensor that measures a pulse that is human biological information, and a pulse pressure sensor that measures the pulse pressure are disposed in the mounting belt. A first biological information measuring means comprising:
A second living body comprising an SPO ₂ sensor for measuring oxygen saturation (hereinafter referred to as “SPO ₂ ”) in human blood, and a mounting means for mounting the SPO ₂ sensor on a fingertip of a hand or a foot. Information measuring means;
Control means for controlling the first biological information measuring means and the second biological information measuring means;
Storage means for storing the output of each sensor;
Wireless communication means controlled by the control means for transmitting the output of each sensor wirelessly;
A biological information measuring device comprising: a power source including a battery that drives the control means. A mounting belt that is wound around either the wrist or ankle of the user, a pulse sensor that measures a pulse that is human biological information, and a pulse pressure sensor that measures the pulse pressure are disposed in the mounting belt. A first biological information measuring means comprising:
A second biological information measuring means comprising an SPO ₂ sensor for measuring SPO ₂ in human blood, and an attaching means for attaching the SPO ₂ sensor to the back of the foot;
Control means for controlling the first biological information measuring means and the second biological information measuring means;
Storage means for storing the output of each sensor;
Wireless communication means controlled by the control means for transmitting the output of each sensor wirelessly;
A biological information measuring device comprising: a power source including a battery that drives the control means. A wearing belt that is wound around the back of the user's foot, a pulse sensor that measures a pulse that is human biological information, a pulse pressure sensor that measures pulse pressure, and an SPO ₂ that measures SPO ₂ in human blood Biological information measuring means comprising _two sensors arranged in the wearing belt;
Control means for controlling the biological information measuring means;
Storage means for storing the output of each sensor;
Wireless communication means controlled by the control means for transmitting the output of each sensor wirelessly;
A biological information measuring device comprising: a power source including a battery that drives the control means.   The biological information measuring apparatus according to claim 1, wherein the battery is a sheet-like flexible battery and is disposed in the mounting belt.   2. A glove or a sock, wherein the flexible battery is built in the back part of the glove or the back part of the sock and connected to the control means. The biological information measuring device according to any one of 3. A three-dimensional acceleration sensor is disposed in the wearing belt,
The control means determines whether or not the user is in a stationary state based on a detection signal of the three-dimensional acceleration sensor, and only when the user is in a stationary state, the pulse sensor and the pulse pressure sensor The biological information measuring apparatus according to claim 1, wherein an output signal is acquired. Furthermore, the battery is a secondary battery, and includes a charging circuit for charging the secondary battery,
2. The charging circuit includes a means for receiving radio waves and a means for converting energy of the received radio waves into a direct current, and charging the secondary battery with the converted direct current. The biological information measuring device according to any one of 1 to 6. The biological information measuring device according to any one of claims 1 to 6,
A biological information measurement system comprising a pad-type second biological information measurement device that is used by being attached to the chest of the user, comprising an electrocardiographic sensor and a heart sound sensor comprising two electrodes,
The second biological information measuring device is
Control means for controlling measurement by the electrocardiographic sensor and the heart sound sensor;
Storage means for storing outputs of the electrocardiographic sensor and the heart sound sensor;
Wireless communication means controlled by the control means for wirelessly transmitting outputs of the electrocardiographic sensor and the heart sound sensor;
A power source comprising a battery for driving the control means,
Synchronizing means for synchronizing the data of the biological information to be measured by synchronizing the control means of the biological information measuring apparatus and the control means of the second biological information measuring apparatus with a synchronization signal. A biometric information measuring system that is characterized.   The biological information measurement system according to claim 8, wherein an interval between the two electrodes is 80 mm or more, and the heart sound sensor is disposed between the two electrodes.   The biological information measuring system according to claim 8 or 9, wherein the second biological information measuring device further includes a temperature sensor.   The biological information measuring system according to claim 10, wherein the temperature sensor is a sheet-like thermocouple or a piezoelectric sheet, and the battery is a sheet-like battery. Furthermore, in the second biological information measuring device, the battery is a secondary battery, and further includes a charging circuit for charging the secondary battery,
9. The charging circuit includes means for receiving radio waves and means for converting energy of the received radio waves into a direct current, and charging the secondary battery with the converted direct current. The biological information measurement system according to any one of 11 to 11. A card type transceiver that performs wireless transmission and reception between the biological information measuring device and the second biological information measuring device;
The card-type transmitter / receiver performs wireless transmission / reception between the biological information measurement device and the second biological information measurement device, and communicates with an external device via a network;
The biological information measuring system according to any one of claims 8 to 12, further comprising a control unit for controlling the wireless transmission / reception means.