KR20130012990A - Method for measuring non-invasive glucose, apparatus and computer-readable recording medium with program therefor - Google Patents

Abstract

PURPOSE: A noninvasive method for measuring blood glucose, a device thereof, and a recording medium thereof are provided to the test blood glucose of a target body by directly transmitting microwaves to the target body, and from a reflection coefficient of the microwaves calculate a blood sugar level to be displayed. CONSTITUTION: A transmitting unit(110) transmits microwaves to a target body. A waveform generator(130) generates microwaves. A receiving unit(120) receives a first reflected wave of the microwaves. An echo cancellation unit(140) generates a second reflected wave after removing direct waves. A control unit(150) measures a reflection coefficient of the second reflected waves and converts the reflection coefficient into a blood sugar level. [Reference numerals] (110) Transmitting unit; (120) Receiving unit; (130) Waveform generator; (140) Echo cancellation unit; (150) Control unit; (160) Display unit; (AA) Human body

Description

Method for Measuring Bloodless Blood Glucose, Apparatus and Computer-Readable Recording Medium for Its Method {Method for Measuring Non-Invasive Glucose]

One embodiment of the present invention relates to a method for measuring bloodless blood glucose, an apparatus therefor, and a computer-readable recording medium. More specifically, a blood-free blood glucose measurement method and apparatus and a computer-readable record for transmitting microwave directly to a human body located within a certain distance and converting and displaying blood sugar levels based on the physical characteristics of the reflected wave therefor. It is about the medium.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

In general, a blood glucose meter uses a needle to cut a finger and then collects a blood. A polymer is used to measure blood glucose levels by absorbing blood into a sensor region in which an enzyme is fixed to an electrode surface.

However, such a conventional blood glucose meter has a problem of feeling unpleasant and painful to see the periodic change in blood sugar due to the pain and fear of blood collection. That is, it is important for diabetics to maintain a normal blood glucose level (glucose concentration of about 100 mg / dl) through periodic blood glucose measurement, which is a big burden in the blood collection process, many diabetics avoid to use.

In order to solve the above problems, an embodiment of the present invention, a blood-free blood glucose measurement method for transmitting a microwave directly to the human body located within a certain distance, and converts and displays the blood sugar level based on the physical characteristics of the reflected wave thereto; Its main purpose is to provide a device and a computer-readable recording medium therefor.

One embodiment of the present invention to achieve the above object, a transmission unit for transmitting a microwave (Microwave) to the object; A waveform generator for generating the microwaves based on sample values of previously stored waveforms; A receiver which receives a first reflected wave with respect to the microwave; An echo canceller for generating a second reflected wave from which the direct wave is removed based on a ratio of the power value of the first reflected wave to the power value of a reference waveform; And a control unit for measuring a reflection coefficient from the second reflected wave, converting the measured reflection coefficient into a blood sugar level, and controlling the converted blood sugar value to be output through a display unit having the converted blood sugar level. It provides a bloodless blood glucose measurement apparatus.

In addition, according to another object of the present invention, a waveform generation process for generating the microwave based on a sample value of a pre-stored waveform; A transmission process of transmitting microwaves to the human body; A receiving step of receiving a first reflected wave for the microwave; An echo cancellation process of generating a second reflected wave from which a direct wave is removed based on a ratio of the power value of the first reflected wave and the power value of a reference waveform; A conversion process of measuring a reflection coefficient from the second reflected wave and converting the measured reflection coefficient into a blood glucose value; And a display process of outputting the converted blood sugar level through a display unit provided with the blood sugar level.

In addition, according to another object of the present invention, the transmission function for transmitting a microwave to the human body; A receiving function for receiving a first reflected wave for the microwaves; An echo cancellation function for generating a second reflected wave from which the direct wave is removed based on a ratio of the power value of the first reflected wave to the power value of the reference waveform; A conversion function of measuring a reflection coefficient from the second reflected wave and converting the measured reflection coefficient into a blood sugar level; And a computer-readable medium having recorded thereon a program for realizing a display function of outputting the converted blood sugar level through a display unit provided with the converted blood sugar level.

As described above, according to one embodiment of the present invention, there is an effect of directly transmitting microwaves to a human body located within a certain distance, and converting and displaying blood sugar levels based on the physical characteristics of the reflected waves thereto. In addition, according to an embodiment of the present invention, the blood glucose measurement apparatus using the transmission of microwaves through the multiple antenna and the physical characteristics of the reflected wave according to the present invention, compared to using a conventional expensive measurement device or a limited sample in the waveguide, it is manufactured to be portable It is easy to do the effect, there is an effect that can reduce the device manufacturing cost.

1 is a block diagram schematically showing a blood-free blood glucose measurement apparatus according to an embodiment of the present invention,
2 is an exemplary view showing a microwave according to an embodiment of the present invention;
3 is a block diagram schematically illustrating a waveform generator and a transmitter according to an embodiment of the present invention;
4 is a block diagram schematically illustrating an echo canceller and a receiver according to an embodiment of the present invention;
5 is a flow chart for explaining a blood-free blood glucose measurement method according to an embodiment of the present invention,
6 is a flowchart illustrating a method of using an average value when measuring blood free blood glucose according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings an embodiment according to the present invention will be described in detail.

1 is a block diagram schematically showing a bloodless blood glucose measurement apparatus according to an embodiment of the present invention.

The blood-free blood glucose measurement apparatus 100 according to an embodiment of the present invention includes a transmitter 110, a receiver 120, a waveform generator 130, an echo canceller 140, a controller 150, and a display 160. ). In an embodiment of the present invention, the bloodless blood glucose measurement apparatus 100 includes a transmitter 110, a receiver 120, a waveform generator 130, an echo canceller 140, a controller 150, and a display 160. Although described as including only, which is merely illustrative of the technical spirit of one embodiment of the present invention, those skilled in the art to which one embodiment of the present invention belongs to the essentials of one embodiment of the present invention Various modifications and variations to the components included in the blood-free blood glucose measurement apparatus 100 may be applied without departing from the characteristics.

Referring to the overall operation of the blood-free blood glucose measurement apparatus 100 according to an embodiment of the present invention. That is, the blood-free blood glucose measurement apparatus 100 transmits microwaves to a human body using multiple antennas, receives a reflected signal, which is a reflected signal, through multiple antennas, measures reflection coefficients differently depending on blood sugar, and measures measured reflections. The coefficient is displayed in terms of blood glucose level. That is, the bloodless blood glucose measurement apparatus 100 according to an embodiment of the present invention uses a microwave instead of a method of injecting blood into the blood sugar device after performing blood collection with pain as in the conventional blood sugar measurement method. Blood glucose can be measured. At this time, since the human body is made of a dielectric having a different dielectric constant (Dielectric Constant) for each individual, the dielectric constant of each individual may vary depending on the blood sugar present in the blood. That is, to measure the blood sugar is to project a microwave having a certain size and waveform to the human body, and since the reflection coefficient of the human body varies depending on the blood sugar of the human body to measure the blood sugar by measuring the reflected wave.

Hereinafter, the battalion to the transmitter 110, the receiver 120, the waveform generator 130, the echo canceller 140, the controller 150 and the display 160 included in the blood-free blood glucose measurement apparatus 100, respectively Explain.

The transmitter 110 is a signal transmission module that transmits microwaves to the object. Here, the transmitter 110 transmits microwaves to a body, which is an object, as an RF (Radio Frequency) Tx module. Here, the microwave refers to an electromagnetic wave (frequency), which usually has a frequency of 1 GHz to 300 GHz and a wavelength of 1 mm to 1 m. That is, the short wavelength generally leads to electromagnetic waves similar to light in terms of straightness, reflection, refraction, and interference. Such microwaves include ultra high frequency (UHF), centimeter wave (SHF), and millimeter wave (EHF), which are electromagnetic waves used in radar, communication, microwave ovens, and television. In addition, the transmitter 110 transmits microwaves to the object at a predetermined signal period Ts and a transmission period Tm. The receiver 120 is a signal receiving module that receives a first reflected wave for microwaves. Here, the first reflected wave basically includes the reflection coefficient for the dielectric constant according to the blood sugar present in the blood of the human body, and includes the direct wave directly received from the transmitting antenna provided in the transmitter 110 and the reflected wave reflected from the human body as an object. Include. In addition, the receiver 120 is an RF Rx module and receives a first reflected wave with respect to a microwave having a constant signal period Ts and a transmission period Tm.

The transmitter 110 and the receiver 120 encode or decode a signal or data, perform an equalizer function to remove multipath noise, perform a digital signal processing function, and perform a data / signal processing function. Baseband conversion function that converts into band signal, performs digital-to-analog conversion and analog-to-digital conversion processing, receives RF (Radio Frequency) signal, converts into IF (Intermediate Frequency) signal, and converts IF signal into RF signal And a means for performing an RF signal processing function for demodulating and amplifying an RF signal, an antenna function for transmitting and receiving a radio signal in the air, and the like.

Meanwhile, the transmitter 110 and the receiver 120 include a multi-input multi-output antenna. On the other hand, to explain the role of such a multi-antenna, if the received signal for the microwave is weak to compensate for this by using a multi-antenna included in the transmitter 110 is applied to the directional transmit signal, as a result to the human body Signal to Noise Ratio (SNR) of microwaves, which are transmitted signals, is increased. In addition, since the receiver 120 increases the SNR in a specific direction by using multiple antennas, the first reflected wave having a level that can be analyzed can be obtained.

Meanwhile, the transmitter 110 and the receiver 120 may transmit and receive a signal within a limited distance. Preferably, it may be about 2 m or more, but it will be possible for those skilled in the art to various modifications and variations within the scope without departing from the essential characteristics of the present invention.

The waveform generator 130 generates microwaves based on sample values of pre-stored waveforms. The waveform generating unit 130 will now be described in more detail with respect to a process of generating microwaves based on sample values of pre-stored waveforms. The waveform generator 130 stores sample values of preset waveforms in a separately provided storage unit, and generates a microwave having a predetermined size and waveform based on previously stored sample values by using control logic. Transmit to 110. For example, when about 100 sample values are stored in a separately provided storage unit, the waveform generator 130 sequentially performs digital-to-analog conversion on about 100 sample values at predetermined times, and then converts the signal to digital-analog conversion. Is transmitted to the transmitter 110, and the microwave, which is a predetermined waveform, is transmitted through the transmitter 110. At this time, the transmitter 110 outputs a value multiplied by about 5 GHz in the process of transmitting the microwave through the antenna.

The echo canceller 140 generates a second reflected wave from which the direct wave is removed based on a ratio of the power value of the first reflected wave and the power value of the reference waveform received through the receiver 120. Here, the echo canceller 140 is an echo canceller, and refers to an apparatus or module that cancels an echo by interfering with an anti-phase wave to a reflected wave or a reflected wave reflected back to the transmitting side. Meanwhile, a process of generating the second reflected wave from which the echo canceller 140 removes the direct wave based on the ratio of the power value of the first reflected wave and the power value of the reference waveform will be described in detail. The echo canceller 140 provides a preset reference waveform. When the ratio of the power value of the reference waveform to the power value of the first reflected wave exceeds the preset value, the echo canceller 140 considers that the waveform is a direct wave and removes the waveform. do.

The controller 150 is a control means for controlling the overall operation of the blood-free blood glucose measurement apparatus 100, and performs the basic operation according to the signal (microwave) transmitted to the transmitter 110 or the first reflected wave received by the receiver 120. Perform additional actions as well as actions. To describe the operation performed by the controller 150 in more detail, the controller 150 measures a reflection coefficient from the second reflected wave, converts the measured reflection coefficient into a blood sugar value, and converts the converted blood sugar value. Control to be output through the display unit provided with. Herein, the controller 150 measures a reflection coefficient of a single frequency band such as a sine wave to measure a reflection coefficient, or a method of obtaining characteristics for each frequency band by using a discrete multi-tone (DMT) signal. This can be used. To describe the reflection coefficient in more detail, the controller 150 measures the reflection coefficient by the power (amount of power) of the reflected wave, in which the sine wave or the DMT signal measuring method is the same. That is, the controller 150 may extract the reflected signal and measure the reflection coefficient as a ratio with respect to the transmission signal (after removing the direct wave). The reflection coefficient may vary depending on the frequency, and the controller 150 measures only the reflection coefficient for a specific frequency in the sine wave, and may measure the reflection coefficient within a predetermined band because it is a DMT broadband signal.

In this case, the controller 150 receives the second reflected wave a predetermined number of times Kmax and uses the average value of the coefficient values measured for each signal as the reflection coefficient. In addition, the controller 150 discards the corresponding data when the coefficient value measured for each signal and the deviation of the accumulated data are less than the threshold. In addition, the controller 150 converts the reflection coefficient into the blood sugar value using a table in which the blood sugar value converted according to the reflection coefficient is stored. On the other hand, such a table may be applied to the optimized blood sugar level matching the reflection coefficient through the experiment.

The display unit 160 displays an overall operation state and blood sugar level of the bloodless blood glucose measurement apparatus 100, and outputs the information when information is transmitted in the form of letters, numbers, symbols, images, and images. Screen display means. The display unit 160 displays messages generated during the operation of the blood-free blood glucose measurement apparatus 100 under the control of the controller 150. For example, the display unit 160 may be used by an LCD. In this case, the display unit 160 may include an LCD controller, a memory capable of storing image data, and an LCD display device.

2 is an exemplary view showing a microwave according to an embodiment of the present invention.

As shown in FIG. 2, the microwaves transmitted through the transmitter 110 have waveforms that are periodically transmitted for measurement. In other words, the microwave-modulated signal waveform is transmitted with a certain period. This transmission period may be determined according to the performance of the controller 150 and the amount of data to be transmitted and received. In addition, the waveform transmission for measuring the reflection coefficient is not only 'once', but is performed by performing a preset number of times Kmax and then obtaining an average value. In this case, the transmission waveform is transmitted in the form as shown in FIG. 2 in the signal period Ts of the waveform and the period Tm in which the waveform is transmitted.

3 is a block diagram schematically illustrating a waveform generator and a transmitter according to an embodiment of the present invention.

The waveform generator 130 according to an embodiment of the present invention includes a waveform storage unit 310 and a waveform generation control unit 320, and the transmitter 110 includes a digital to analog converter (DAC) 330. . In an exemplary embodiment of the present invention, the waveform generator 130 includes the waveform storage 310 and the waveform generation controller 320, and the transmitter 110 includes only the DAC 330. As merely illustrative of the technical spirit of one embodiment of the invention, those skilled in the art to which one embodiment of the present invention belongs to the waveform generator (within the scope not departing from the essential characteristics of one embodiment of the present invention) 130 and the components included in the transmitter 110 may be variously modified and modified.

The waveform storage unit 310 stores sample values of preset waveforms. The waveform storage unit 310 is a non-volatile memory, for example, to store sample values of a preset waveform, and may be electrically erased and programmable read only memory (EEPROM) or block capable of modifying the contents in byte units. Flash memory and flash memory (SDRAM), which can modify contents in units of), may be used. Of course, the waveform storage unit 310 is a kind of storage concept, and those skilled in the art to which the present invention belongs may be modified and modified in various ways without departing from the essential characteristics of the present invention. .

The waveform generation control unit 320 generates microwaves having a predetermined size and waveform based on the sample values previously stored in the waveform storage unit 310, and transmits the microwaves to the transmission unit 110. That is, the specific operation of the waveform generation control unit 320 will be described. For example, when about 100 sample values are stored in the waveform storage unit 310, the waveform generation control unit 320 is stored in the waveform storage unit 310. The 100 stored sample values are sequentially transmitted to the DAC 330 at predetermined times, and microwaves, which are preset waveforms, are transmitted through the transmitter 110. At this time, the transmitter 110 outputs a value multiplied by about 5 GHz in the process of transmitting the microwave through the antenna. Meanwhile, the DAC 330 digitally-analog converts the signal received from the waveform generation controller 320 and transmits the signal to the transmitter 110.

Hereinafter, an operation of generating a transmission waveform by the waveform storage 310, the waveform generation controller 320, and the DAC 330 illustrated in FIG. 3 will be described. That is, the waveform of the signal for transmission is stored in the waveform storage unit 310, the sample value of the waveform is periodically transmitted to the DAC (330) according to the counter (Counter), the transmission of such a transmission waveform is transmitted to the transmitter 110 Is done through. In order to transmit a transmission waveform based on a sample value previously stored in the waveform storage unit 310, a waveform generation control unit 320 including control logic is required. Here, the counter refers to setting information used by the waveform generation controller 320 to transmit a predetermined number of data. The waveform generation control unit 320 transmits a sample value of a waveform previously stored by the waveform storage unit 310 to the DAC 330 according to a clock, and the information on the transmission period Tm is registered. ) Information on the transmission period Tm is specified through the controller 150. On the other hand, the signal stored in the waveform storage unit 310 is generated in consideration of the frequency band and the sampling frequency of the signal, it can store a sine wave and a DMT signal.

4 is a block diagram schematically illustrating an echo canceller and a receiver according to an exemplary embodiment of the present invention.

The echo canceller 140 according to an embodiment of the present invention includes a power ratio providing unit 410 and a reference waveform providing unit 420, and the receiving unit 120 includes an analog to digital converter (ADC) 430. do. In the exemplary embodiment of the present invention, the echo canceller 140 includes a power ratio providing unit 410 and a reference waveform providing unit 420, and the receiving unit 120 includes only the ADC 430. As merely illustrative of the technical spirit of an embodiment of the present invention, those skilled in the art to which one embodiment of the present invention belongs, the echo canceller within a range without departing from the essential characteristics of one embodiment of the present invention The components included in the 140 and the receiver 120 may be variously modified and modified. Here, the echo canceller 140 is an echo canceller, and refers to an apparatus or module that cancels an echo by interfering with an anti-phase wave to a reflected wave or a reflected wave reflected back to the transmitting side.

When the ratio between the power value of the reference waveform and the power value of the first reflected wave exceeds a preset value, the power ratio providing unit 410 considers that the waveform is a direct wave and removes the waveform. The reference waveform providing unit 420 provides a preset reference waveform to the power ratio providing unit 410. The ADC 430 may analog-to-digital convert the first reflected wave received from the receiver 120 and transmit the analog reflected signal to the echo canceller 140 to the transmitter 110.

That is, the echo canceller 140 includes a first reflected wave received through the receiver 120 and a direct wave directly received from a transmission antenna provided in the transmitter 110 and a reflected wave reflected from a human body that is an object. The second reflected wave is generated by removing the direct wave included in the first reflected wave. This will be described with reference to the power ratio providing unit 410 and the reference waveform providing unit 420 illustrated in FIG. 4. The power ratio providing unit 410 may be a direct wave based on a reference waveform of a signal used in a transmitter and a first reflected wave. Can be removed. That is, when the ratio of the power value of the reference waveform and the power value of the first reflected wave exceeds a preset value, the power ratio providing unit 410 removes the waveform by considering the waveform as a direct wave.

Figure 5 is a flow chart for explaining a blood-free blood glucose measurement method according to an embodiment of the present invention.

The bloodless blood glucose measurement apparatus 100 generates microwaves based on sample values of pre-stored waveforms (S510). In operation S510, the blood-free blood glucose measurement apparatus 100 stores a sample value of a preset waveform and generates a microwave having a predetermined size and waveform based on the stored sample value. The blood-free blood glucose measurement apparatus 100 transmits microwaves to the human body (S520). In operation S520, the blood-free blood glucose measurement apparatus 100 transmits microwaves to the subject at a predetermined signal period Ts and a transmission period Tm.

The bloodless blood glucose measurement apparatus 100 receives the first reflected wave with respect to the microwave (S530), and generates a second reflected wave from which the direct wave is removed based on the ratio of the power value of the first reflected wave to the power value of the reference waveform ( S540). In operation S540, the blood-free blood glucose measurement apparatus 100 provides a preset reference waveform. When the ratio of the power value of the preset reference waveform to the power value of the first reflected wave exceeds the preset value, the corresponding waveform is a direct wave. The waveform is considered to be removed.

The bloodless blood glucose measurement apparatus 100 measures the reflection coefficient from the second reflected wave, and converts the measured reflection coefficient into a blood sugar level (S550). In operation S550, the blood-free blood glucose measurement apparatus 100 converts the reflection coefficient into a blood sugar level using a table in which blood sugar values converted according to the reflection coefficient are stored. In operation S550, the blood-free blood glucose measurement apparatus 100 receives the second reflected wave a predetermined number of times and uses the average value of the coefficient values measured for each signal as the reflection coefficient. In addition, the blood-free blood glucose measurement apparatus 100 discards the data when the count value measured for each signal and the deviation value for the accumulated data are less than the threshold value. That is, the blood-free blood glucose measurement apparatus 100 considers that the data is abnormal data when the count value measured for each signal and the deviation value for the accumulated data are less than the threshold value. The blood-free blood glucose measurement apparatus 100 outputs the converted blood sugar level through the display unit 160 provided with the converted blood sugar level (S560).

In FIG. 5, steps S510 to S560 are described as being sequentially executed. However, this is merely illustrative of the technical idea of an embodiment of the present invention, and the general knowledge in the technical field to which an embodiment of the present invention belongs. Those having a variety of modifications and variations may be applicable by changing the order described in FIG. 5 or executing one or more steps of steps S510 to S560 in parallel without departing from the essential characteristics of an embodiment of the present invention. 5 is not limited to the time series order.

As described above, the bloodless blood glucose measurement method according to an embodiment of the present invention described in FIG. 5 may be implemented in a program and recorded in a computer-readable recording medium. A computer-readable recording medium having recorded thereon a program for implementing a bloodless blood glucose measurement method according to an embodiment of the present invention includes all kinds of recording devices for storing data that can be read by a computer system. Examples of such computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and also implemented in the form of a carrier wave (e.g., transmission over the Internet) . The computer readable recording medium may also be distributed over a networked computer system so that computer readable code is stored and executed in a distributed manner. In addition, functional programs, code, and code segments for implementing an embodiment of the present invention may be easily inferred by programmers skilled in the art to which an embodiment of the present invention belongs.

6 is a flowchart illustrating a method of using an average value when measuring blood free blood glucose according to an embodiment of the present invention.

The blood-free blood glucose measurement apparatus 100 generates microwaves based on sample values of pre-stored waveforms, transmits microwaves to the human body, receives first reflected waves for microwaves, and calculates power values of the first reflected waves and reference waveforms. Generates a second reflected wave from which the direct wave is removed based on the ratio of the power values, measures the reflection coefficient from the second reflected wave, converts the measured reflection coefficient into a blood sugar value, and outputs the converted blood sugar value through the display unit having the converted blood sugar value. do. In this case, the blood-free blood glucose measurement apparatus 100 does not measure the reflection coefficient by one measurement when measuring the reflection coefficient, but calculates an average value by measuring the reflection coefficient by a preset number Kmax. This will be described in detail.

The blood-free blood glucose measurement apparatus 100 generates microwaves based on sample values of pre-stored waveforms and transmits microwaves to the human body. The reflection coefficient measurement frequency K is set to '0' before the microwaves are first transmitted. (S610).

The blood-free blood glucose measurement apparatus 100 transmits microwaves at a constant signal cycle Ts and a transmission cycle Tm for transmitting microwaves to the human body. The bloodless blood glucose measurement apparatus 100 receives the first reflected wave with respect to the microwave, and generates the second reflected wave from which the direct wave is removed based on the ratio of the power value of the first reflected wave and the power value of the reference waveform. That is, the blood-free blood glucose measurement apparatus 100 provides a preset reference waveform. When the ratio of the power value of the preset reference waveform to the power value of the first reflected wave exceeds the preset value, the corresponding waveform is a direct wave. Consider and remove the waveform. The blood-free blood glucose measurement apparatus 100 outputs the waveform of the second K-th reflected wave, which is the number of times of measurement (S620), and measures the reflection coefficient from the second K-th reflected wave (S630).

The blood-free blood glucose measurement apparatus 100 checks whether the reflection coefficient measured from the 'K' second reflected wave and the deviation value for the accumulated data are less than the threshold value (S640). As a result of checking in step S640, when the reflection coefficient measured from the second K-th reflected wave and the deviation value for the cumulative data are less than the threshold value, the blood-free blood glucose measurement apparatus 100 is the second K-th second data, which is the corresponding data. The reflection coefficient measured from the reflected wave is discarded (S650). In operation S650, the blood-free blood glucose measurement apparatus 100 may determine from the second K-th reflected wave when the reflection coefficient measured from the second K-th reflected wave that is the corresponding data and the deviation value of the cumulative data are less than the threshold. It is assumed that the measured reflection coefficient is abnormal data. On the other hand, when the result of the check in step S640 indicates that the reflection coefficient measured from the second K-th reflected wave and the deviation value for the cumulative data exceed the threshold, the blood-free blood glucose measurement apparatus 100 performs the second K-th reflected wave. The average reflection coefficient is calculated by summing the reflection coefficients measured from (S660).

The blood-free blood glucose measurement apparatus 100 checks whether the reflection coefficient measurement number 'K' is less than the preset number 'Kmax' (S670). As a result of checking in step S670, when the reflection coefficient measurement number 'K' is less than the preset number Kmax, the blood-free blood glucose measurement apparatus 100 sets the reflection coefficient measurement number 'K + 1' as the 'K' value (S680). After step S620 to S670 are performed. On the other hand, as a result of checking in step S670, when the number of reflection coefficient measurement 'K' exceeds the preset number of times 'Kmax', the blood-free blood glucose measurement apparatus 100 converts the average reflection coefficient into a blood sugar value and then converted the blood sugar The numerical value is output through the display unit 160 provided.

In FIG. 6, steps S610 to S680 are described as being sequentially executed. However, this is merely illustrative of the technical idea of an embodiment of the present invention, and the general knowledge in the technical field to which an embodiment of the present invention belongs. Those having a variety of modifications and variations may be applicable by changing the order described in FIG. 6 or executing one or more steps of steps S610 to S680 in parallel without departing from the essential characteristics of an embodiment of the present invention. 6 is not limited to the time series order.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

100: bloodless blood glucose measurement device 110: transmitter
120: receiver 130: waveform generator
140: echo canceller 150: controller
160: display unit 310: waveform storage unit
320: waveform generation control unit 310: DAC
410: power ratio providing unit 420: mood waveform providing unit
430: ADC

Claims (11)

A transmitter for transmitting microwaves to the object;
A waveform generator for generating the microwaves based on sample values of previously stored waveforms;
A receiver which receives a first reflected wave with respect to the microwave;
An echo canceller for generating a second reflected wave from which the direct wave is removed based on a ratio of the power value of the first reflected wave to the power value of a reference waveform; And
A control unit for measuring a reflection coefficient from the second reflected wave, converting the measured reflection coefficient into a blood sugar value, and controlling the converted blood sugar value to be output through a display unit having the converted blood sugar value
Bloodless blood glucose measurement apparatus comprising a. The method of claim 1,
The transmitting unit,
The blood-free blood glucose measurement apparatus characterized in that for transmitting the microwave to the subject at a predetermined signal period (Ts) and the transmission period (Tm). The method of claim 1,
The waveform generator,
A waveform storage unit for storing a sample value of a preset waveform; And
A waveform generation control unit for generating the microwave having a constant size and waveform based on the sample value and transmitting to the transmitting unit
Bloodless blood glucose measurement apparatus comprising a. The method of claim 1,
The forward echo canceller,
A reference waveform providing unit configured to provide the preset reference waveform; And
If the ratio of the power value of the reference waveform and the power value of the first reflected wave exceeds a predetermined value, the power ratio providing unit for removing the waveform by considering the waveform as the direct wave
Bloodless blood glucose measurement apparatus comprising a. The method of claim 1,
The control unit,
The blood-free blood glucose measurement apparatus, characterized in that the average of the coefficient value measured for each signal after receiving the predetermined number of times the second reflected wave is used as the reflection coefficient. The method of claim 5, wherein
The control unit,
The blood-free blood glucose measurement apparatus, characterized in that for discarding the data when the coefficient value measured for each signal and the deviation (Deviation) to the cumulative data is less than the threshold (Threshold). The method of claim 1,
And the transmitter and the receiver include a multi-input multi-output antenna. The method of claim 1,
The first reflected wave,
The blood-free blood glucose measurement apparatus comprising the reflection coefficient for the permittivity coefficient according to the blood sugar present in the blood of the human body. The method of claim 1,
The control unit,
The blood-free blood glucose measurement apparatus, characterized in that for converting the reflection coefficient to the blood sugar level using a table that stores the blood sugar value converted in accordance with the reflection coefficient. A waveform generation process of generating the microwaves based on sample values of previously stored waveforms;
A transmission process of transmitting microwaves to the human body;
A receiving step of receiving a first reflected wave for the microwave;
An echo cancellation process of generating a second reflected wave from which a direct wave is removed based on a ratio of the power value of the first reflected wave and the power value of a reference waveform;
A conversion process of measuring a reflection coefficient from the second reflected wave and converting the measured reflection coefficient into a blood glucose value; And
Display process of outputting through the display unit provided with the converted blood sugar level
Bloodless blood glucose measurement method comprising a. On computer
A waveform generation function for generating the microwaves based on sample values of previously stored waveforms;
A transmission function for transmitting microwaves to the human body;
A receiving function for receiving a first reflected wave for the microwaves;
An echo cancellation function for generating a second reflected wave from which the direct wave is removed based on a ratio of the power value of the first reflected wave to the power value of the reference waveform;
A conversion function of measuring a reflection coefficient from the second reflected wave and converting the measured reflection coefficient into a blood sugar level; And
Display function to output the converted blood sugar level through the display unit provided
Readable recording medium having recorded thereon a program for realizing the program.

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