KR100734622B1 - Apparatus and method for measuring physiology signal with auto calibration - Google Patents

Abstract

The present invention relates to a bio-signal measuring device having an automatic correction function, in particular one or more light-receiving unit for obtaining a bio-signal by transmitting and receiving a frequency signal in contact with the user's skin, receiving the biological signal collected through the light-receiving unit A measurement signal processor for preprocessing the collected biosignal into a digital value, a wireless communication unit wirelessly providing a user's actual external measurement value for correction of the measured biosignal value, the measured value received from the outside and the light-receiving unit A signal correction unit for calculating a coefficient value for correction by calculating the coefficient value for correction, calculating an accurate result value based on the coefficient value for correction, a display unit for displaying the calculated result value, and the final calculated result. It includes a speaker that outputs a warning signal if the value deviates from the normal value. It shall be.

Blood sugar, blood alcohol level, light-receiving part, vital signal, wireless module, correction value

Description

Apparatus and method for measuring bio-signals with automatic correction function {APPARATUS AND METHOD FOR MEASURING PHYSIOLOGY SIGNAL WITH AUTO CALIBRATION}

1 is a block diagram showing a detailed structure of a portable contact type bio-signal measuring apparatus having an automatic correction function according to an embodiment of the present invention.

2 is a flowchart illustrating a portable contact biosignal measuring procedure having an automatic correction function according to an exemplary embodiment of the present invention.

Figure 3 is a graph showing the absorbance for each frequency for measuring blood glucose according to an embodiment of the present invention.

Figure 4 is a graph showing the absorbance for each frequency for measuring the alcohol concentration according to an embodiment of the present invention.

5 is a view showing a portable contact type bio-signal measuring apparatus according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: light-receiving unit 101, 513: first blood sugar measurement light-receiving unit

102, 514: second blood glucose measurement light-receiving unit

103, 515: light-receiving unit for measuring the first alcohol concentration

104, 516: the second alcohol concentration measurement light-receiving unit

110: measurement signal processing unit 120: signal correction unit

130 control unit 140 speaker

150, 511: wireless communication unit 160, 512: display unit

170: input unit

311, 321, 411, 421: Absorption to normal blood

312, 322: Absorption of high blood sugar

313, 323, 413, 423: measured distance from normal blood

412, 422: Absorption to high blood alcohol

510: portable contact biosignal measuring device

520: wireless terminal

The present invention relates to a biosignal measuring apparatus and method thereof, such as blood sugar or blood alcohol concentration, and more particularly, to a portable contact biosignal measuring apparatus and method having a correction function.

Diabetes is a major cause of death and disability worldwide and has plagued quite a few people. Complications of diabetes include heart and kidney disease, blindness, nerve damage and hypertension, and the estimated overall costs are significant. Long-term clinical studies have shown that moderate control of blood glucose levels can significantly reduce the onset of complications. Thus, an important element of diabetes management is the self-monitoring of blood glucose levels by diabetics anytime, anywhere.

Conventionally, in order for a diabetic patient to self-monitor blood glucose levels, blood samples are collected through the skin prior to analysis, and then blood glucose levels are measured using the collected samples. However, such a conventional monitoring method has a problem that diabetics cannot use regularly due to the inconvenience and pain of taking blood through the skin before analyzing the blood glucose level. Therefore, there is a need for a new method of self-monitoring the blood sugar level in order to allow the diabetics to control the blood sugar more precisely and easily. Accordingly, numerous methods for measuring blood glucose levels have been studied, from invasive methods such as microdialysis to non-invasive techniques based on spectroscopy.

As one method by the non-invasive technique, there is a method of irradiating near-infrared electromagnetic radiation (light in the wavelength range of 750-2500 nm) to one part of the body through near infrared spectroscopy. This light is partially absorbed and scattered upon interaction with tissue components before being reflected behind the detector. In addition, the detected light will contain quantitative information based on the known interaction of incident light with tissue components in the body, including water, fat, proteins and sugars. Non-invasive measurement of sugars by near infrared spectroscopy is based on detecting the amount of light attenuation caused by the absorption signal of blood glucose as seen in the target tissue volume.

In addition, since the dangers caused by drunk driving and the like are seriously raised, interest in the blood alcohol concentration measurement method as well as the blood sugar measurement is increasing. Therefore, in recent years, methods for attaching and measuring blood alcohol concentration measurement devices to portable terminals such as mobile phones have been proposed.

As such, the biosignal measuring devices that measure the user without using a blood sample by using optical signals having different absorbances provide considerable convenience when compared to devices by the blood sampling method. However, because the characteristics of the signal are different for each user, a significant error occurs in the actual measured value.

Therefore, there is a need for a means that is portable and capable of measuring accurate blood glucose and alcohol concentration values.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a biosignal measuring apparatus such as blood sugar or blood alcohol concentration, and a method for measuring the biosignal by means of information received by wireless communication means. The present invention provides a portable contact type biosignal measuring apparatus and method capable of accurately measuring a biosignal by correcting the present invention.

According to an aspect of the present invention, there is provided a biosignal measuring apparatus having an automatic correction function, including: one or more light-receiving units for obtaining a biosignal by transmitting and receiving a frequency signal in contact with a user's skin; A measurement signal processor configured to receive the bio signals collected through the light receiving unit and preprocess the collected bio signals into digital values; A wireless communication unit wirelessly providing an actual external measurement value of a user to correct the measured biosignal value; A signal correction unit configured to calculate a coefficient value for correction by calculating the measured value received from the outside and data measured through the light-receiving unit, and to calculate an accurate result value by the count value for correction; A display unit which displays the calculated result value; And a speaker for outputting a warning signal when the final calculated result is out of the normal value.

In addition, the biological signal measuring method having an automatic correction function according to the present invention for achieving the above object comprises: a first step of receiving a measured value measured by an individual through an external device through a wireless communication means for correction of the measured value; A second step of emitting light of each frequency signal for measuring a bio-signal after contacting the light-receiving part with the skin; A third step of signal-processing the received signal for each frequency to calculate absorbance for each frequency; A fourth step of calculating a coefficient value for correction by operating with data measured from the light receiving unit based on the externally received measurement value; And a fifth step of calculating an accurate blood glucose and blood alcohol concentration by the count value for the correction.

The present invention proposes a portable contact type biosignal measuring apparatus and method having an automatic correction function. As described above, in the prior art, blood was mainly collected and blood glucose was measured, and a method of measuring alcohol concentration in respiration is mainly used. However, the device according to the present invention can measure the blood sugar in a non-invasive manner while the user is carrying, and can measure the alcohol concentration by contact, and has a function of transmitting and receiving data wirelessly in conjunction with the mobile terminal.

That is, the device according to the present invention can measure the bio-signal without using blood sampling to the user by using the optical signal with different absorbance, and is convenient to carry and provides the convenience of measurement because it uses a contact method. .

On the other hand, in the present invention, since the characteristics of the signal are different according to each user, the actual external measurement value is wirelessly provided or received from the user to automatically calculate the correction coefficient for each individual. In this way, it is possible to provide the user with a more accurate value by automatically correcting the blood sugar value and the alcohol concentration value, and it is possible to prevent health by preventing the alarm when the user exceeds the normal average value. .

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same reference numerals and the same elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram showing a detailed structure of a portable contact type bio-signal measuring apparatus having an automatic correction function according to an embodiment of the present invention. Referring to FIG. 1, a portable contact type biosignal measuring apparatus having an automatic correction function according to an exemplary embodiment of the present invention includes a light emitting unit 100, a measurement signal processor 110, and a signal beam for measuring a biosignal for each frequency. The government 120, the controller 130, the speaker 140, the wireless communication unit 150, the display unit 160, and the input unit 170 may be configured.

The light receiving unit 100 may include a plurality of light receiving units 101 to 104 according to the type of the biosignal to be measured and the frequency of the light source. In FIG. 1, a first blood glucose measurement light-receiving unit 101 and a second blood sugar measurement light-receiving unit 102 are provided to measure blood glucose, and a first alcohol concentration measurement light-receiving unit 103 and a second alcohol are used to measure alcohol concentration. A concentration measuring light receiving unit 104 is provided. As described above, the number of the light receiving parts 100 may vary depending on the type and frequency of the bio signals to be measured.

The first blood sugar light-receiving unit 101 for measuring blood glucose is a module for light-receiving a light source having a frequency f ₁ having the highest absorbance of blood sugar compared to normal blood, and places a fingertip on the light-receiving unit sensor. It can also be configured as a watch or bracelet-type device can be measured by wearing only by mounting the light-receiving unit sensor inside the wrist.

The second blood sugar light-receiving unit 102 for measuring blood sugar is a module for light-receiving a light source having a frequency f ₂ having the lowest absorbance of blood sugar compared to normal blood, similar to the first blood sugar light-receiving unit 101. Fingertips can be placed on the light-receiving part sensor and measured, or it can be configured as a watch or bracelet-type device so that the light-receiving part sensor is mounted inside the wrist to be measured by wearing only.

On the other hand, the first alcohol concentration light-receiving unit 103 is a light-receiving unit for measuring the alcohol concentration is a module for receiving and receiving a light source having a frequency (f ₃ ) having the highest absorption of alcohol concentration compared to normal blood. In addition, the second alcohol concentration light-receiving unit 104 is a light-receiving unit for measuring the alcohol concentration is a module for receiving and receiving a light source having a frequency (f ₄ ) the lowest absorption of the alcohol concentration compared to normal blood.

The biological signals collected through the plurality of light receiving units 100 are input to the measurement signal processing unit 110, and the measurement signal processing unit 110 preprocesses the biological signals collected by each light receiving unit 100 into digital values. You will go through the process.

On the other hand, the collected bio-signals have a different signal characteristic according to each user, so that the error is too severe to be used as a measurement value. Therefore, according to the present invention, accurate measurement values are provided to the user by reflecting the correction values for the respective users.

That is, the wireless communication unit 150 provided in the device according to the present invention wirelessly receives the actual external measurement value of the user, and automatically calculates a correction coefficient based on the actual external measurement value. The wireless communication unit 150 is a wireless RF transmission and reception module for wirelessly receiving a value measured from another measuring device for the correction of personalized blood sugar or alcohol concentration. At this time, the microprocessor (that is, the controller 130) embedded in the device automatically calculates and stores a value for calibration with data measured from the sensor of the device based on a measurement value wirelessly input from the outside. do.

Therefore, the measured bio-signals processed by the measurement signal processor 110 are corrected by reflecting the coefficient values for the correction, which are calculated by the signal correction unit 120, thereby finally obtaining accurate results (i.e., blood sugar values or alcohol concentrations). Value) is calculated.

The calculated result is provided to the user through a notification means such as the display unit 160 or the speaker 140. That is, the calculated result may be displayed to the user through the display unit 160 (eg, a display device such as an LCD or LED) or may be known to the user through the speaker 140.

On the other hand, when the final calculated result exceeds the normal value and reaches a dangerous level, that is, when the user is out of the usual normal average bound (Average Bound), a warning signal is generated through the speaker 140 or the wireless The communication unit 150 notifies the fact of danger to a predetermined place (eg, home or hospital). In other words, by alerting the user at regular time intervals or outputting an alarm sound, the user is quickly notified of the danger.

The measurement value used for correction according to the present invention may be received through the wireless communication unit 150 as described above, or may be directly input by the user through the input unit 170. That is, the input unit 170 is an input device for receiving a user input, and receives a value measured by another measuring device to correct blood sugar or alcohol concentration from the user. At this time, the control unit 130 is a microprocessor embedded in the device, based on the measurement value received from the outside as described above in the signal correction unit 120 for the correction with the data measured from the sensor of the present system The coefficient values A ₁ , B ₁ , C ₁ , and D ₁ are calculated.

2 is a flowchart illustrating a portable touch type biosignal measurement procedure having an automatic correction function according to an exemplary embodiment of the present invention. Referring to FIG. 2, first, a measurement value measured by an individual through an external device is received through a wireless communication means provided in the apparatus according to the present invention for correction of the measured value (S201).

After the user of the device according to the present invention contacts the light-receiving unit 100 of the device with the skin, the user emits light of each frequency signal (S202) for the measurement of the biological signal. Then, the absorbance signal for each frequency is calculated by signal processing the received signal for each frequency (S203).

Meanwhile, in order to calculate an accurate result value reflecting the correction value for each user according to the present invention, the coefficient value for correction is calculated by calculating with the data measured from the light-receiving unit 100 based on the measured value received from the outside. It calculates (S204). The correct blood sugar and blood alcohol concentration are calculated by using the count value for correction (S205).

The result value calculated above may be displayed (S206) by the display means provided in the apparatus or may be notified through a speaker. On the other hand, if the measured result is a dangerous value out of the normal value (S207), by outputting the alarm sound through the speaker (S208) it is possible to promptly notify the fact of danger.

3 is a graph showing absorbance at each frequency for measuring blood glucose according to an exemplary embodiment of the present invention. Referring to FIG. 3, the frequency f ₁ is a light source of a frequency having the highest absorbance of blood glucose compared to normal blood, and is a band of the frequency at which d ₁ 313 indicated in the graph is the largest. That is, the d ₁ 313 refers to the distance measured by the light source f ₁ having a frequency 312 having the highest blood sugar absorption level compared to the normal blood 311 using user blood.

On the other hand, the frequency f ₂ is a light source of the frequency having the lowest absorbance of blood sugar compared to normal blood is a band of the frequency where the d ₂ (323) shown in the graph is the largest. That is, the d ₂ 323 means a distance measured by the light source f ₂ having a frequency 322 having the lowest blood glucose absorbance compared to the normal blood 321 using user blood.

4 is a graph showing absorbance at each frequency for measuring alcohol concentration according to an embodiment of the present invention. Referring to FIG. 4, the frequency f ₃ is a light source of a frequency having the highest absorption of alcohol compared to normal blood, and is a band of the frequency at which d ₃ 413 shown in the graph is greatest. That is, the d ₃ 413 refers to the distance measured by the light source f ₃ at the frequency having the highest value 412 of alcohol absorption compared to the normal blood 411 using user blood.

On the other hand, the frequency f ₄ is a light source of the frequency having the lowest absorption of alcohol compared to the normal blood is a band of the frequency where d ₄ (423) shown in the graph is the largest. That is, the d ₄ 423 means a distance measured by the light source f ₄ having a frequency 422 having the lowest alcohol absorbance value 422 compared to the normal blood 421 using user blood.

Hereinafter, a method for calculating and correcting blood sugar and alcohol concentrations according to the present invention based on absorbance measured by a light source of such frequency will be described.

The method of calculating and correcting blood glucose first calculates d ₁ and d ₂ using the light sources f ₁ and f ₂ , and receives a blood sugar value measured by another device from the outside, and corrects the correction coefficient (A ₁ , B ₁ ) is calculated. The blood glucose value reflecting the correction factor may be calculated as shown in Equation 1 below.

Referring to [Equation 1], it can be seen that h is a function consisting of d ₁ , d ₂ , A ₁ , B ₁ for calculating the blood glucose level. In this case, various correction methods such as LS, RLS, and RMS may be used as the correction method in which the correction coefficient is reflected.

Next, the method of calculating and correcting the alcohol concentration first calculates d ₃ and d ₄ using the light sources f ₃ and f ₄ , and receives a blood glucose value measured by another device from the outside to obtain a correction coefficient suitable for the characteristics of the individual ( C ₁ , D ₁ ) is calculated. The alcohol concentration value reflecting the correction factor may be calculated as shown in Equation 2 below.

Referring to [Equation 2], it can be seen that h is a function consisting of d ₃ , d ₄ , C ₁ , D ₁ for calculating the blood alcohol concentration. In this case, various correction methods such as LS, RLS, and RMS may be used as the correction method in which the correction coefficient is reflected.

5 is a view showing a portable contact type bio-signal measuring apparatus according to an embodiment of the present invention. Referring to FIG. 5, the biosignal measuring apparatus 510 according to the present invention may be implemented as a portable watch type as shown. That is, the light-receiving unit 100 for acquiring the biosignal may be easily connected to the skin by wearing the watch-type biosignal measuring device on the wrist.

The portable contact type biosignal measuring apparatus 510 receives the measured value from the outside for generating the correction value according to the present invention as described above. Accordingly, from the external wireless terminal 520 (that is, the wireless terminal including the measured biosignal information or the external biometric measuring device equipped with the wireless communication function) through the wireless communication unit 511 included in the device 510. You will receive the measured value.

In addition, the portable contact type bio-signal measuring device 510 may include a display unit 512 to display a measured result. When the measured value deviates from a normal value, an alarm sound may be transmitted through a means such as a speaker 517. You will be notified.

On the other hand, the portable contact type bio-signal measuring apparatus 510 includes a plurality of light-receiving units 513, 514, 515, and 516 on the surface in contact with the user's skin, thereby easily acquiring a bio-signal. In addition, as described above, the user may directly input the measured value for generating the correction value through the input means 518.

The portable contact biosignal measuring method having an automatic correction function according to the present invention may be embodied as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and also include those implemented in the form of carrier waves such as transmission over the Internet. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by those equivalent to the claims.

According to the present invention as described above, by using a portable contact type biosignal measuring device having an automatic correction function, the user provides convenience by measuring the biosignal without collecting blood, and provides portability and communication with the outside. do.

In addition, since the characteristics of the signal are different for each user, the device automatically has the function of automatically correcting the correct blood glucose value and alcohol concentration value by receiving the actual external measurement value wirelessly or inputting it from the user and automatically calculating the correction coefficient for each individual person. . Therefore, it is possible to provide a more accurate value to the user, and there is an advantage that can be prevented health care by promptly notify when the user exceeds the normal average value.

Claims (12)

At least one light-receiving unit for obtaining a biological signal by transmitting and receiving a frequency signal in contact with the skin of the user; A measurement signal processor configured to receive the bio signals collected through the light receiving unit and preprocess the collected bio signals into digital values; A wireless communication unit wirelessly providing an actual external measurement value of a user to correct the measured biosignal value; A signal correction unit configured to calculate a coefficient value for correction by calculating the measured value received from the outside and data measured through the light-receiving unit, and to calculate an accurate result value by the count value for correction; And And a notification means for providing the calculated result value to a user. The method of claim 1, wherein the light receiving unit, A first blood sugar light-receiving unit for light-receiving a light source having a frequency of higher absorption in blood than blood absorption in normal blood; And And a second blood sugar light-receiving unit for light-receiving a light source having a frequency at which blood glucose is higher than blood absorption in normal blood. The method of claim 1, wherein the light receiving unit, A first alcohol concentration light-receiving unit for light-receiving a light source having a frequency of higher absorption in blood than an alcohol concentration in normal blood; And And a second alcohol concentration light-receiving unit for light-receiving a light source having a frequency at which the alcohol concentration is higher than the absorption in normal blood and having a low absorption in blood. The method of claim 1, wherein the device, Bio-signal measuring device having an automatic correction function, characterized in that the bracelet is wrapped around the wrist so that the light-receiving unit is in direct contact with the body. The method of claim 1, wherein the wireless communication unit, The biological signal measuring device having an automatic correction function, characterized in that for transmitting the final calculated result value to a predetermined external wireless communication equipment. The apparatus of claim 1, wherein the notifying means includes a display unit which displays the calculated result value. The biological signal measuring apparatus of claim 1, wherein the notifying means includes a speaker that outputs a warning signal when the final calculated result is out of a normal value. Receiving a measurement value measured by an individual through an external device through a wireless communication means for correction of the measurement value; A second step of emitting light of each frequency signal for measuring a bio-signal after contacting the light-receiving part with the skin; A third step of signal-processing the received signal for each frequency to calculate absorbance for each frequency; A fourth step of calculating a coefficient value for correction by operating with data measured from the light receiving unit based on the externally received measurement value; And And a fifth step of calculating an accurate blood glucose and blood alcohol concentration by the count value for the correction. The method of claim 8, wherein after the fifth step, And outputting an alarm sound through a speaker when the measured result value is out of a normal value. The method of claim 8, wherein the second step, Light-receiving a light source having a frequency higher in absorbance in blood than in absorbance in normal blood; And And a light-receiving light source having a frequency lower in absorbance in blood than in absorbance in normal blood. The method of claim 8, wherein the second step, Light-receiving a light source having a frequency of higher absorption in blood with higher alcohol concentration than absorption in normal blood; And A method of measuring a biological signal having an auto-correction function, the method comprising: light-receiving a light source having a frequency at which alcohol concentration is higher than blood absorption in normal blood and having a lower absorption in blood. The method of claim 8, wherein And a measurement value measured by the external device used to correct the measured value as a value input by a user.

Images