KR100697211B1 - Blood pressure measurement system and method using unrestrained pulse wave arrival time measurement - Google Patents

Abstract

According to the present invention, when a user sits in a chair and uses a computer, the pulse wave arrival time is measured unrestrained by using an electric non-contact ECG measurement using the back of the chair and an optical volume pulse wave measurement using a computer mouse. In addition, the present invention provides a blood pressure measurement system and method using the unrestricted pulse wave arrival time measurement to measure blood pressure using the same.

The present invention provides a non-contact electrocardiogram measuring means for measuring the electrocardiogram of the user without direct contact with the user's body by using the electrode and the ground plate installed in a predetermined portion of the chair under the environment in which the user uses a computer; An unconstrained optical volumetric pulse wave measuring means for measuring the volumetric pulse wave of a user without restriction by measuring peripheral blood flow using a computer mouse; And a signal processing means for calculating the pulse wave arrival time using the electrocardiogram signal from the non-contact electrocardiogram measuring means and the volume pulse wave from the unbound optical volume pulse wave measuring means, and outputting blood pressure information therefrom. .

Description

Blood pressure measurement system and method using unresponsive pulse wave arrival time measurement {SYSTEM AND METHOD FOR ESTIMATION BLOOD PRESSURE BY USE OF UNCONSTRAINED PULSE TRANSIT TIME MEASUREMENT}

1 is a conceptual diagram of a blood pressure measurement system using the unbound pulse wave arrival time measurement according to the present invention.

Figure 2 is a schematic block diagram of a blood pressure measurement system using the unbound pulse wave arrival time measurement according to the present invention.

3 is a view showing an embodiment in which the electrical non-contact electrocardiogram measuring apparatus of FIG. 2 is applied to a chair.

Figure 4 is a block diagram of the electrical non-contact electrocardiogram measuring apparatus of FIG.

5 is a detailed block diagram of a filter and an amplifier of FIG. 4.

Figure 6 is a view showing the input impedance according to the gain value of the non-contact electrocardiogram measuring device of the present invention.

7 is an exemplary embodiment in which the unbound optical volumetric pulse wave measuring apparatus of FIG. 2 is applied to a mouse of a computer.

FIG. 8 is a block diagram of the unbound optical volumetric pulse wave measuring apparatus of FIG. 2. FIG.

9 is a block diagram illustrating the signal processing device of FIG. 2.

10 is an overall operational flow diagram of the present invention.

Fig. 11 is a waveform diagram of a feature point detection of optical bulk pulse wave in the present invention.

12 shows the relationship between blood pressure and pulse wave arrival time.

Figure 13 is an application example of the present invention.

<Description of the symbols for the main parts of the drawings>

100: non-contact electrocardiogram measuring device 200: non-constrained light volume pulse wave measuring device

110: electrode attached to the amplifier 120,220: filter and amplifier

130,230: A / D conversion unit 140: digital signal processing unit

150,240: signal transmission unit 160: ground plate

170: chair 300: signal processing device

310: pulse wave arrival time calculation unit 320: blood pressure information output unit

330 display unit 340 storage unit

The present invention relates to a blood pressure measurement system and method using unresponsive pulse wave arrival time measurement, and in particular, when the user sits in a chair and uses a computer, the electric non-contact ECG measurement using the back of the chair and the computer's forehead The present invention relates to a blood pressure measurement system and a method using an unbounded pulse wave arrival time measurement to measure a pulse wave arrival time unrestrained using optical volumetric pulse wave measurement using a mouse.

As the number of elderly people at home increases due to the general aging of society, the interest in the welfare and management of the elderly has gradually increased, and in various ways, they have started to approach the health care of the elderly in new ways, and the blood pressure measurement, which is the basis of the medical examination. Attention is gathering.

Blood pressure measurement is now one of the most common clinical measures that doctors perform in the examination room or during special surgery. It is the basis of health diagnosis to help understand the integrated function.

Blood pressure refers to the pressure of blood flowing through blood vessels on the walls of blood vessels and is determined by the amount of blood, elasticity of blood vessels, and resistance to contraction. By measuring blood pressure, we can infer the function of the heart and blood vessels.Blood pressure, ie, peak blood pressure, when the heart contracts and pumps blood all over our body, indicates the contractile force of the heart. Low blood pressure can be seen as an indicator of how well and smoothly blood flows through blood vessels.

Human blood vessels consist of arteries from which blood flows from body to body, veins from body to heart, and capillaries that connect between them. In general, arterial pressure, or arterial blood pressure, is called blood pressure. The blood pressure varies greatly depending on the size and location of the blood vessels, and the pressure in the order of aorta, artery, small artery, capillary, predetermined vein, vein, and middle process vein. Because of this gradually lowering the name of the blood vessels called aortic pressure, arterial blood pressure, arterial blood pressure, and so on. Arterial blood pressure, which is maintained by the heartbeat, is one of the basic and customary clinical signs of assessing cardiovascular function and is involved in the perfusion of all tissues, but is particularly important in cerebrovascular and coronary blood flow.

Conventional blood pressure measurement includes a stethoscope, an oscillometric method and a pulse wave transmission speed measurement method using a stethoscope.

Auscultation is a method of detecting Korotkoff sounds caused by opening of arteries blocked by external pressure, which is a hassle to go to the hospital to measure blood pressure and may be affected by the doctor's subjectivity. There is this.

Oscillometric measurement method, which is mainly used at present, presses the cuff pressure attached to the upper arm of the measurement object to a pressure higher than Systolic Blood Pressure to block blood vessels, and then gradually decreases the pressure when cuffs are reduced. Characteristic vibration occurs in the pressure value inside, and the cuff pressure when the magnitude of the vibration waveform reaches the maximum value is determined as the pressure value closest to the average blood pressure.

In general, the magnitude of the oscillation waveform of cuff pressure at systolic and diastolic blood pressures has a specific ratio with the magnitude of the vibration waveform at average blood pressure. This ratio is called characteristic ratios. Because of the large variation (10-20%) due to various factors, an error may occur in some individuals when a fixed characteristic ratio is applied. In addition, the blood pressure monitor using the cuff is affected by blood vessel hardness, the viscosity of the blood vessel wall, the magnitude of the pulse pressure, the heart rate, the state of the brachial tissue, the measurement posture, the characteristics and the size of the cuff material, and the like. In the process of pressurizing and depressurizing, there is an inconvenience that blood does not pass through the arm.

In addition, the pulse wave propagation velocity measurement method should be attached to three or more electrocardiogram electrodes on the skin, and the burden of the ultrasonic wave or piezoelectric element wrapped around the wrist or the optical volume pulse wave detection device must be attached to the finger for peripheral pulse wave measurement. exist.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide an optical volumetric pulse wave measuring device mounted on a mouse and an electric non-contact electrocardiogram provided in a user's chair in a situation where the user does not recognize when the user sits in a chair and uses a computer. Unbounded pulse wave enables to measure the pulse wave transmission speed unrestrained without attaching the electrocardiogram electrode or optical volumetric pulse wave sensor to the body by using The present invention provides a blood pressure measuring system and method using time of arrival measurement.

Blood pressure measurement system using the unrestrained pulse wave arrival time measurement according to the present invention for achieving the above object, the user's electrocardiogram using the electrode and the ground plate which is installed in close proximity to the right place of clothing without direct contact with the user's body Electrical non-contact ECG measurement means for measuring; An unconstrained optical volumetric pulse wave measuring means for measuring the volumetric pulse wave of a user without restriction by measuring peripheral blood flow using a computer mouse; And a signal processing for calculating the pulse wave arrival time using the electrocardiogram signal from the non-contact electrocardiogram measuring means and the volume pulse wave from the unbound optical pulse wave measuring means, and outputting the corresponding blood pressure information using the calculated pulse wave arrival time. It is characterized by consisting of means.

The non-contact electrocardiogram measuring means may include at least one amplifier-attached electrode installed in close proximity to a place of clothing without direct contact with a user's body; A filter and amplifying unit filtering noise of the biosignal obtained from the amplifier-attached electrode and amplifying the filtered signal; An A / D converter converting the output of the filter and the amplifier into a digital signal; A signal transmission unit for transmitting the output of the A / D conversion unit to the signal processing means; And a ground plate provided in close proximity to a place of clothing without direct contact with a user's body.

The amplifier attached electrode is installed on the back of the chair under the environment where the user uses a computer, and the ground plate is installed on the seat of the chair, or the amplifier attached electrode is installed on the seat of the chair, and the ground plate is supported on the back of the chair. It is preferable to be installed in a part.

The electrical non-contact ECG measuring means includes a subtractor for obtaining a signal difference between the A / D converter and the signal transmitter and a digitized biosignal input through the A / D converter, and a biosignal input through the subtractor. Preferably, the digital signal processor further comprises a subtraction filter for filtering noise generated in the subtraction process.

In addition, the unbound optical volumetric pulse wave measuring means is installed on the side of the mouse of the sensing unit for measuring the blood flow of the peripheral blood vessels to measure the volumetric pulse wave which is a temporal change of the blood vessel volume; A filter and amplifying unit which removes and amplifies noise components in the output of the sensing unit; An A / D converter converting the output of the filter and the amplifier into a digital signal; And a signal transmitter for transmitting the output of the A / D converter to the signal processing means.

The signal processing means may include a pulse wave arrival time calculation unit configured to calculate a pulse wave arrival time using an electrocardiogram signal from the non-contact electrocardiogram measuring means and a volume pulse wave of the user from the unconstrained optical volume pulse wave measuring means; A storage unit for storing blood pressure information according to the pulse wave arrival time of the user; A blood pressure information output unit which outputs blood pressure information corresponding to a calculation result of the pulse wave arrival time calculation unit based on the information of the storage unit; And a display unit displaying an output of the blood pressure information output unit on a user screen.

Blood pressure measurement method using the unrestrained pulse wave arrival time measurement according to the present invention for achieving the above object, receives the user's bio-signal through the electrode and ground plate installed in close proximity to the right place of clothing without direct contact with the user's body A first step of filtering and amplifying the same, and then transmitting the result by A / D conversion; A second step of filtering and amplifying peripheral blood flow measured using a computer mouse, and then transmitting the A / D conversion; And a third step of calculating a pulse wave arrival time using the electrocardiogram signal obtained from the first step and the volumetric pulse wave obtained from the second step, and outputting corresponding blood pressure information using the calculated pulse wave arrival time. It features.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following examples are merely to illustrate the present invention is not limited to the contents of the present invention.

According to the present invention, when the user sits on a chair and uses a computer, the ECG and peripheral pulse wave measurements of the user are made in a situation where the user is not aware of the pulse wave arrival time is calculated and the corresponding blood pressure can be measured. In general, the use of a computer in an office or the like is performed by sitting on a chair. However, the present invention will be described below using a chair for electrocardiogram measurement and a computer mouse for volumetric pulse wave measurement. It is not limited.

1 is a conceptual diagram of a blood pressure measurement system using a non-responsive pulse wave arrival time measurement according to the present invention, Figure 2 is a schematic block diagram of Figure 1, the present invention is largely an electrical non-contact ECG measuring apparatus 100 , An unconstrained optical volume pulse wave measuring apparatus 200 and a signal processing apparatus 300.

The non-contact electrocardiogram measuring apparatus 100 measures the electrocardiogram of the user without direct contact with the user's body by using an electrode provided in the user's chair back and a ground plate positioned in the chair seat, and the unbounded optical pulse wave The measuring device 200 is connected to the mouse 2 of the computer 1 to measure the volume pulse wave of the user without restraining the user, the signal processing device 300 is the electrical non-contact electrocardiogram measuring device 100 To calculate the pulse wave arrival time using the electrocardiogram signal measured in the) and the volumetric pulse wave of the user measured by the unbound optical volumetric pulse wave measuring apparatus 200, and to output the measured blood pressure information using the calculated pulse wave arrival time It is composed.

3 is a view showing an embodiment in which the non-contact electrocardiogram measuring apparatus 100 of the present invention is applied to a chair, FIG. 4 is a block diagram thereof, and FIG. 5 is a detailed block diagram of the filter and amplification unit 120 of FIG. 4. 6 is a view showing the input impedance according to the gain value of the non-contact electrocardiogram measuring apparatus 100 of the present invention.

The electrical contactless electrocardiogram measuring apparatus 100 includes an amplifier-attached electrode 110, a filter and amplifier 120, an A / D converter 130, a digital signal processor 140, a signal transmitter 150, and a ground. It is composed of a plate 160.

The amplifier-attached electrode 110 has an electrode surface 111 on one side, and a preamplifier 113 for amplifying and converting a minute biosignal input through a displacement current into a voltage without direct body contact. : Pre-amp, the preamplifier 113 is made to be shielded by a shield (115: Shield) provided on the outside, the amplifier attached electrode 110 is provided with at least one.

In the present invention, since the electrical contactless electrocardiogram measuring apparatus 100 is applied to a chair 170 that is an environment in which a user uses a computer, the chair 170 in which the shoulders of both sides of the user are positioned with the amplifier-attached electrode 110 is provided. At least one or more of the back portion 171 in place is installed, the ground plate 160 is installed in a predetermined position of the seat 172 of the chair 170 where the hip of the subject is located. Here, the ground plate 160 installed on the seat 172 of the chair 170 is used as a reference voltage.

In addition, at least one amplifier-attached electrode 110 is installed on both sides of the seat portion 172 of the chair 170 where the user's thigh is located, and the chair 170 at which both shoulders or the back of the subject are located. Of course, the ground plate 160 may be installed in the backrest portion 171 of the.

In the present invention, the amplifier-attached electrode 110 and the ground plate 160 are respectively installed on the back portion 171 or the seat portion 172 of the chair 170, the seat portion 172 of the chair 170 And the cushion-mounted electrode 110 and the ground plate 160 may be formed to perform the same function as described above.

On the other hand, the measurement of the biopotential in a system that is not in electrical contact with the surface of the body is achieved by the displacement current. Here, the displacement current is a transmission method of an electrical signal between the skin and the electrode surface of the human body, and as the potential changes in the body, a change in voltage is generated on an electrode sandwiched between a non-conductive material such as clothes, blankets, and leather. , The current generated accordingly.

In the present invention, after the biological signal generated on the surface of the body 10 is input to the amplifier-attached electrode 110 through the displacement current, the signal generated by the amplification and impedance conversion is measured, and the measured minute biological signal is measured. In order to convert the voltage to a high gain value, the amplifier-attached electrode 110 is configured to generate a high input impedance.

The filter and amplification unit 120 of FIG. 4 is connected to the preamplifier 113 of the amplifier attached electrode 110 to convert the biosignal generated according to the electrocardiogram detected by the amplifier attached electrode 110 into a voltage. To be made.

In this case, a high range for preventing the base line from swaying in the biosignal passing through the preamplifier 113 and for removing and filtering a change in the residual offset according to the biosignal when the biosignal is converted into a voltage Band blocking for removing and filtering common-mode noise of 60 Hz, which is a disturbance voltage of the human body, included in the displacement current according to the ECG signal passing through the pass filter 121 and the high pass filter 121 Amplified by the amplifier 122 and the amplifying unit 123 of FIG. A low pass filter 124 for outputting an analog signal is provided.

The A / D converter 130 converts the biosignal according to the electrocardiogram output through the filter and amplifier 120 of FIG. 4 into a digital signal.

The digital signal processor 140 is provided at one side of the A / D converter 130 to subtract each biosignal according to the electrocardiogram measured by the amplifier-attached electrode 110 and the subtractor. And a subtraction filter 142 for removing noise generated in the subtraction process of the digital signal input through 141.

The signal transmitter 150 transmits the output of the digital signal processor 140 to the signal processor 300.

The ground plate 160 is installed close to the user's clothing 20 when the non-contact electrocardiogram measuring apparatus 100 according to the present invention is applied.

Here, the ground plate 160 detects a common mode signal by adding a signal from at least one amplifier-attached electrode 110 and a method of connecting directly to the ground, and adds the signal as an appropriate gain. It is divided into the method of connecting to ground with negative feedback, and the whole system is more complicated to connect to ground with negative feedback, but there is a method of connecting directly to ground to remove common mode noise, but the latter is more effective. appear.

That is, a method of connecting to ground by negative feedback includes amplifying a common mode noise component detected by summing output signals of two electrodes with an amplifier having a negative gain or a negative gain, and then transmitting the same to the human body through the ground plate 160. Since the potential of the human body is pulled against the common mode noise, the magnitude of the common mode noise detected by the electrode can be reduced, so that the common mode noise can be more effectively removed than the direct ground method.

On the other hand, when the input value (V _in ) of the biosignal input to the preamplifier 113 of the amplifier-attached electrode 110 is equal to the output value (V _out ) of the output biosignal, the output signal gain of the biosignal is equal. The value can be expressed as V _out / V _in = (jwR _in C _E ) / (1 + jwR _in (C _in + C _E )), where C _in (total input volume of the amplifier) is C _E It needs to be much smaller than (capacitance) between the electrode and the human body, which requires a system with a very large input impedance. Where R _in is the total parallel input resistance of the amplifier. As C _in increases, V _out / V _in decreases.

In the present invention for this purpose, the input terminal of the system is configured using OPA 124 having a sufficiently large input impedance. The OPA 124 is a semiconductor IC amplifier with low noise, low bias current, and high input impedance.

On the other hand, since the electrical path to the electrode surface 111 and the electrode surface 111 and the preamplifier 113 maintains a very high impedance with respect to the ground is not significantly affected by external noise. In order to minimize the high impedance portion from the electrode surface 111 to the amplifier 123 to reduce external input noise, the amplifier-type electrode 110 having the preamplifier 113 attached to the electrode surface 111 is provided. Used.

FIG. 7 shows an embodiment in which the unconstrained optical volumetric pulse wave measuring apparatus 200 according to the present invention is applied to a mouse 2 of a computer 1, and FIG. 8 shows a circuit block diagram thereof. The device 200 is installed on the side of the mouse 2 of the computer 1, the sensing unit 210 for measuring the blood flow of peripheral blood vessels to measure the volumetric pulse wave, which is a temporal change of the blood vessel volume, the sensing unit 210 of the Filter and amplification unit 220 for removing and amplifying noise components in the output, A / D converter 230 for converting the output of the filter and amplifier 220 to a digital signal, the A / D converter ( It consists of a signal transmission unit 240 for transmitting the output of the 230 to the signal processing device (300).

The filter of the filter and the amplifier 220 passes only a predetermined frequency band. Although the volume pulse wave is mainly a component of a low frequency band, since a relatively high frequency component may occur at the low point of the volume pulse wave depending on an individual or a pulse rate, the predetermined frequency band may be a frequency band from 0.05 Hz to 20 Hz. .

In addition, the signal processing apparatus 300 uses the electrocardiogram signal from the non-contact electrocardiogram measuring apparatus 100 and the volume pulse wave of the user from the unbound optical volumetric pulse wave measuring apparatus 200 as shown in FIG. 9. The pulse wave arrival time calculation unit 310 for calculating the pulse wave arrival time, the blood pressure information output unit 320 for outputting the blood pressure information from the pulse wave arrival time calculation unit 310, and the blood pressure information output unit 320 It is composed of a display unit 330 for displaying the output of the) on the user screen.

In general, as the blood pressure value according to the pulse wave arrival time is different according to the person, the signal processing apparatus 300 of the present invention includes a storage unit 340 and has blood pressure information according to the pulse wave arrival time for each user. The information output unit 320 outputs the blood pressure information according to the corresponding user by using the blood pressure information according to the pulse wave arrival time stored in the storage unit 340. In addition, the display unit 330 may be a monitor of the computer 1 in the present invention.

Since the present invention intends to measure electrocardiogram and volumetric pulse wave unrestrained in an environment where the user sits on the chair 170 and uses the computer 1, the signal processing apparatus 300 in the computer 1 of FIG. It is preferable to provide each of the functional blocks of the computer 1 to perform the function of the signal processing apparatus 300. In addition, of course, in order to implement the present invention, the operating software of the present invention must be installed in the computer 1.

The present invention configured as described above will be described with reference to the flowchart of FIG. 10.

First, in the present invention, in the environment where the user sits on the chair 170 and uses the computer 1, the biosignal generated from the user's body 10 is input to the amplifier attachment electrode 110 through the displacement current (S110). )

At this time, the minute biological signal of the body 10 input through the electrode surface 111 of the amplifier-attached electrode 110 with the garment 20 therebetween is amplified and impedance-converted, and the amplifier-attached electrode 110 is present. The biosignal input and converted is input to the filter and amplifying unit 120.

A high impedance is applied to the amplifier attached electrode 110 in order to convert a minute biosignal generated from the body 10 into a voltage having a high gain value.

On the other hand, the amplifier attached electrode 110 serves as a kind of sensor for sensing (Sensing) the potential of the skin surface of the body 10, for this purpose by coating a copper foil on one side of the PCB (Printed Circuit Board), Is produced.

When the electrode-type electrode 110 manufactured as described above assumes that the thickness of the garment 20 is 1 mm and the relative dielectric constant of the garment 20 is 2, the capacitance between the electrode and the human body is calculated to be about 30 dB. The impedance can be expected to be 0.25G ohm at 20㎐.

On the other hand, the preamplifier 113 provided in the amplifier-attached electrode 110 is a voltage that is easy to use the biological signal generated according to the ECG detected by the amplifier-attached electrode 110 in the filter and amplification unit 120. The OPA 124 is used in the preamplifier 113, and the OPA 124 has an input resistance of 10 ¹³ Ω and an input capacitance of 1 kW.

The biosignal output from the amplifier attachment electrode 110 having the structure and configuration as described above is input to the filter and amplifying unit 120, and then filtered and amplified (S120), and the filtered and amplified biosignal A is obtained. It is input to the / D conversion unit 130.

On the other hand, the filter and amplification unit 120 passes through the band stop filter 122 after passing through the band stop filter 122 after the phenomenon in which the base line of the bio signal in the high pass filter 121 and the variation of the residual deviation are removed and filtered. The common bio-mode noise is removed and filtered, and the minute biological signal from which the common-mode noise is removed is amplified by a constant magnification by the amplifier 123 and amplified by the amplifier 123. After passing through the low pass filter 124, is output as an analog signal is input to the A / D converter 130.

The high pass filter 121 is configured as a fourth order sallen-key high pass filter in order to remove and filter a phenomenon in which the baseline of the biosignal passing through the preamplifier 113 fluctuates and a change in the residual deviation.

Here, the low pass filter 124 has a signal of 50 kHz or less corresponding to the electrocardiogram among the signals passing through the amplifier 123, the signals in the band of more than the band can be recognized as noise, the low pass filter ( In order to prevent aliasing, which is the overlap of frequencies, the analog signal output from 124) must be converted into a digital signal. For this purpose, the low pass filter 124 is composed of a fourth-order sallen-key low pass filter which is a kind of active filter circuit.

The analog signal output through the filter and amplifying unit 120 is converted into a digital signal by the A / D converter 130 (S130).

The digital signal output through the A / D converter 130 is input to the digital signal processor 140, and the input digital signal is subtracted through the subtractor 141 and then subtracted by the subtractor filter 142. The noise generated by the signal is removed and transmitted to the signal processing apparatus 300 through the signal transmitter 150 (S140).

On the other hand, when the electrocardiogram signal is measured by the non-contact electrocardiogram measuring apparatus 100, the unbound optical volumetric pulse wave measuring apparatus 200 measures the volumetric pulse wave.

That is, when the user sits on the chair 170 and uses the mouse 2, the sensing unit 210 installed on the side of the mouse 2 measures the amount of blood flow in the thumb (S210).

The output of the sensing unit 210 is a noise component is removed and amplified by the filter and amplification unit 220, and then converted into a digital signal through the A / D converter 230, which is a signal transmission unit 240 It is transmitted to the signal processing device 300 through (S220-S240).

Accordingly, the signal processing apparatus 300 receives the electrocardiogram signal from the electrical non-contact electrocardiogram measuring apparatus 100 and the volume pulse wave from the non-constrained optical volume pulse wave measuring apparatus 200 through a receiving unit (not shown). The calculation unit 310 calculates the pulse wave arrival time (S310).

The pulse wave arrival time is generally the time from the moment of the R-peak of the electrocardiogram to the point of time of the pulse wave in the distal region. In the present invention, in order to minimize the deformation of the optical volume pulse wave waveform caused by the user holding the mouse 2, The point where the slope of the light volume pulse wave is maximized is extracted as a feature point. This is because the sensor for measuring the optical volume pulse wave changes the waveform according to the force that the finger touches the sensor. will be.

That is, Pulse Arrival Time (PAT) in the present invention may be defined as the maximum slope point of the optical volume pulse wave from the R-peak of the electrocardiogram, as shown in the waveform diagram of FIG.

The blood pressure information output unit 320 outputs the corresponding blood pressure information based on the blood pressure information according to the pulse wave arrival time for the corresponding user stored in the storage unit 340 (S320), which is displayed through the display unit 330. It is shown to the user (S330). The relationship between the pulse wave arrival time and the blood pressure is shown in FIG. 12.

FIG. 13 illustrates an application example of the present invention, and illustrates a health care system through blood pressure management for a long time of a user through a connection with a server using a wired or wireless communication network.

As shown in FIG. 13, the blood pressure measurement system 1100 using the unrestricted pulse wave arrival time measurement of the present invention is connected to the health care server 1300 through a wired / wireless communication network 1200. Of course, the blood pressure measurement system 1100 using the wired or wireless communication network 1200 is capable of communication.

The health care server 1300 receives the blood pressure measurement results periodically or aperiodically from the blood pressure measurement system 1100 using the non-response-based pulse wave arrival time measurement and stores them in the database 1400 for a long time for the user. It is possible to grasp the change in blood pressure over a period of time, and also to allow the user to manage the health through advice such as dietary improvement based on the blood pressure for the user.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below Or it may be modified.

As described above, the present invention has the following effects.

 Firstly, the present invention provides an electrocardiogram measuring electrode or light using an electro-contact electrocardiogram provided in a user's chair and an optical volume pulse wave measuring device mounted in a mouse in a situation where the user does not recognize when the user sits in a chair and uses a computer. It is possible to measure pulse wave arrival time without any volume pulse wave sensor attached to the body, and it is possible to measure blood pressure without restriction.

Second, in the reality that hypertension patients are increasing according to westernized eating habits, the measurement of blood pressure regularly is very important, so it is convenient to measure blood pressure during the time of holding the mouse even if the blood pressure is not measured separately. Will be provided.

Third, it is very difficult to measure the change in blood pressure among the various changes in living body that appear when stressed, the present invention can easily measure the change in blood pressure according to the stress, it can also bring a biofeedback effect Will be.

Fourth, remote health management is possible by connecting to the server through a communication network.

Claims (11)

Electrical non-contact electrocardiogram measuring means for measuring an electrocardiogram of a user by using an electrode and a ground plate installed in close proximity to a place of clothing without directly contacting a user's body; An unconstrained optical volumetric pulse wave measuring means for measuring the volumetric pulse wave of a user without restriction by measuring peripheral blood flow using a computer mouse; And Signal processing means for calculating the pulse wave arrival time using the electrocardiogram signal from the non-contact electrocardiogram measuring means and the volume pulse wave from the unbound optical volumetric pulse wave measuring means, and outputting the corresponding blood pressure information using the calculated pulse wave arrival time. ; Blood pressure measurement system using an unbounded pulse wave arrival time measurement, characterized in that consisting of. The method of claim 1, wherein the non-contact ECG measuring means At least one amplifier attachable electrode installed in close proximity to the garment without direct contact with a user's body; A filter and amplifying unit filtering noise of the biosignal obtained from the amplifier-attached electrode and amplifying the filtered signal; An A / D converter converting the output of the filter and the amplifier into a digital signal; A signal transmission unit for transmitting the output of the A / D conversion unit to the signal processing means; And A ground plate provided in close proximity to a place of clothing without direct contact with a user's body; Blood pressure measurement system using the unrestricted pulse wave arrival time measurement, comprising a. The method of claim 2, wherein the electrical non-contact ECG measurement means is applied to a chair, Unlimited pulse wave arrival time measurement, characterized in that at least one amplifier-attached electrode is installed on both sides of the back of the chair seated by the user, and a ground plate is installed at a predetermined position of the seat of the chair where the user's hip is located. Blood pressure measurement system. The method of claim 2, wherein the electrical non-contact ECG measurement means is applied to a chair, At least one amplifier-attached electrode is installed on both sides of the seat portion of the chair seated by the user, and a ground plate is installed at a predetermined position of the back portion of the chair. The method of claim 2, wherein the non-contact ECG measuring means includes a subtractor and a subtractor for obtaining a signal difference of the digitized biosignal inputted through the A / D converter between the A / D converter and the signal transmitter. And a digital signal processor comprising a subtraction filter for filtering out noise generated in the subtraction process of the biological signal input through the blood pressure measurement system. According to claim 1, wherein the unbound optical volumetric pulse wave measuring means A sensing unit installed at a side of a mouse to measure blood flow of peripheral blood vessels in order to measure volume pulse wave, which is a temporal change of blood vessel volume; A filter and amplifying unit which removes and amplifies noise components in the output of the sensing unit; An A / D converter converting the output of the filter and the amplifier into a digital signal; And A signal transmission unit for transmitting the output of the A / D conversion unit to the signal processing means; Blood pressure measurement system using the unrestricted pulse wave arrival time measurement, comprising a. The method of claim 1, wherein the signal processing means A pulse wave arrival time calculation unit for calculating pulse wave arrival time using an electrocardiogram signal from the non-contact electrocardiogram measuring means and a volume pulse wave of a user from the unbound optical volume pulse wave measuring means; A storage unit for storing blood pressure information according to the pulse wave arrival time of the user; A blood pressure information output unit which outputs blood pressure information corresponding to a calculation result of the pulse wave arrival time calculation unit based on the information of the storage unit; And A display unit displaying an output of the blood pressure information output unit on a user screen; Blood pressure measurement system using the unrestricted pulse wave arrival time measurement, comprising a. The method of claim 7, wherein the pulse wave arrival time calculation unit A blood pressure measurement system using the unbounded pulse wave arrival time measurement, characterized by extracting the point where the gradient of the light volume pulse wave is the maximum. Electrical non-contact electrocardiogram measuring means for measuring an electrocardiogram of a user by using an electrode and a ground plate installed in close proximity to a place of clothing without directly contacting a user's body; An unconstrained optical volumetric pulse wave measuring means for measuring the volumetric pulse wave of a user unrestrictedly by measuring peripheral blood flow using a computer mouse; And a signal processing for calculating the pulse wave arrival time using the electrocardiogram signal from the non-contact electrocardiogram measuring means and the volume pulse wave from the unbound optical volumetric pulse wave measuring means, and outputting the corresponding blood pressure information using the calculated pulse wave arrival time. Blood pressure measurement apparatus using the unrestricted pulse wave arrival time measurement comprising; And A health management server connected to the blood pressure measuring device through a wired / wireless communication network, receiving a blood pressure measurement result periodically or aperiodically from the blood pressure measuring device, and storing the result in a database to allow blood pressure management for the user; Unrestrained pulse wave arrival time measurement based health care system, characterized in that consisting of. A first step of receiving a user's biosignal through an electrode and a ground plate installed in close proximity to a garment without direct contact with a user's body, filtering and amplifying the biosignal, and transmitting the result by A / D conversion; A second step of filtering and amplifying peripheral blood flow measured using a computer mouse, and then transmitting the A / D conversion; And A third step of calculating a pulse wave arrival time using the electrocardiogram signal obtained from the first step and the volumetric pulse wave obtained from the second step, and outputting corresponding blood pressure information using the calculated pulse wave arrival time; Blood pressure measurement method using a non-responsive pulse wave arrival time measurement, characterized in that it comprises a. 11. The method of claim 10, wherein the non-responsive pulse wave arrival time measurement is characterized by extracting the point where the slope of the optical volume pulse wave is maximized when calculating the pulse wave arrival time.

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