System and method for acquiring high-resolution amplified bioactivity signals

Abstract

A system and method for acquiring a high-resolution amplified biological activity signal is provided. The system for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention includes a biological activity signal processing unit that acquires a biological activity signal of a user using a radar device and performs preprocessing to generate a preprocessed biological activity signal, a digital signal processing unit that performs digital processing on the preprocessed biological activity signal to generate a digitally processed biological activity signal, and a signal extraction unit that outputs the digitally processed biological activity signal and extracts amplified signals for each of the previously set biological activity signal classifications.

Description

Technical Field

[0001] The present invention relates to a system and method for acquiring a high-resolution amplified bioactivity signal, and particularly to a bioactivity signal acquired with a resolution above a reference level that can analyze information on the user's bioactivity acquired via radar, and based on which an amplification degree is controlled and amplified and then output. The present invention relates to a system and method for acquiring a high-resolution amplified bioactivity signal formed to output after amplification.

Background Art

[0002] In recent years, in Korean society, the population that requires management or attention has been increasing. The population that requires management or attention can be defined as the population that needs help when an emergency occurs or the population without cohabitants, and for example, it can include the elderly, the disabled, and single-person household furniture. According to recent surveys, the elderly population has exceeded 9 million, and the populations of single-person household furniture and registered disabled persons have also exceeded 6.6 million and 2.6 million, respectively. In addition, the population of so-called lonely deaths, which are discovered after death due to the absence of cohabitants, also exceeds 10,000.

[0003] In addition, combined with the recent increase in personal terminals and the increasing demand for personal health management, recently, various solutions or applications that collect personal healthcare data and provide customized health management content for each individual have been emerging one after another. In order to collect such personal healthcare data, wearable devices or attached devices are used. When using a wearable device, since healthcare data is acquired from a part close to the body, preprocessing of the measured data is often unnecessary. However, in the case of an attached device, since the user's physical activity information is measured from a distance, not only is the probability of noise mixing into the measured data high, but there is also a problem that it is difficult to distinguish minute differences.

Summary of the Invention

Problems to be Solved by the Invention

[0004] To solve the problems of the conventional technology described above, one embodiment of the present invention aims to provide a high-resolution amplified bioactivity signal acquisition system and method that can variably determine the amplification size for real-time changing bioactivity signals by determining the amplification size using a pre-set noise ratio and amplification level, even when acquiring low-frequency and low-resolution bioactivity signals via radar, and amplifying the signal. [Means for solving the problem]

[0005] According to one aspect of the present invention for solving the above-mentioned problems, a biosignal processing unit that acquires the user's biosignal using a radar device and performs preprocessing to generate a preprocessed biosignal, a digital signal processing unit that performs digital processing on the preprocessed biosignal to generate a digitally processed biosignal, and the digitally processed biosignal Obtain, The signals have already been amplified according to the already established biosignal classification. Signal output section that sorts and outputs signals. It is equipped with the following.

[0006] The biosignal processing unit may include a biosignal acquisition module that acquires the biosignal, which includes a first biosignal that is a biosignal and a second biosignal that is a signal, and a biosignal preprocessing module that performs the preprocessing on the biosignal to generate the preprocessed biosignal.

[0007] The preprocessing may involve amplifying the first and second biological signals to a predetermined size using an amplifier, and then applying a low-pass filter with a predetermined bandwidth.

[0008] The digital signal processing unit may include a signal conversion module that digitizes the preprocessed biological signal, a signal ratio calculation module that checks the amplification of the digitized preprocessed biological signal (digital biological signal) and performs conversion of the digital biological signal to calculate the signal-to-noise ratio, and an amplification size determination module that applies the amplification and the signal-to-noise ratio to a pre-set algorithm to determine the pre-set size.

[0009] The signal output unit may include a digital processing biosignal output determination module that determines whether to output the digital biosignal if the signal-to-noise ratio is greater than or equal to a previously set size, and whether to output the digital biosignal if the signal-to-noise ratio is less than a previously set size, and a digital processing biosignal output module that, when it is determined to output the digital processing biosignal, determines the previously set biosignal classification to which the digital processing biosignal corresponds, sorts the digital processing biosignal according to the signal classification, and outputs the digital processing biosignal.

[0010] According to one aspect of the present invention, a method for acquiring a high-resolution amplified biological signal is provided. The method for acquiring a high-resolution amplified biological signal includes the steps of: a biological signal processing unit acquiring the user's biological signal using a radar device and processing the biological signal to generate a pre-processed biological signal; a digital signal processing unit processing the pre-processed biological signal to generate a digitally processed biological signal; and a signal output In the section, the digital processing of the biological signal Obtain, The signals have already been amplified according to the already established biosignal classification. Steps to sort and output This includes,

[0011] The step of processing the biological signal may include the step of acquiring the biological signal, which includes a first biological signal and a second biological signal, which is a signal, and the step of performing the preprocessing on the biological signal to generate the preprocessed biological signal.

[0012] The preprocessing may involve amplifying the first and second biological signals to a predetermined size using an amplifier, and then applying a low-pass filter with a predetermined bandwidth.

[0013] The steps for processing the digital signal may include: digitizing the preprocessed biological signal; checking the amplification of the digital biological signal, which is the digitized preprocessed biological signal, and calculating a signal ratio by performing a conversion of the digital biological signal to calculate the signal-to-noise ratio; and determining the amplification size by applying the amplification and the signal-to-noise ratio to a previously set algorithm to determine the previously set size.

[0014] The aforementioned signal output The steps may include determining whether to output a digitally processed biosignal, which is determined to output the digital biosignal if the signal-to-noise ratio is greater than or equal to a previously set size, and to not output the digital biosignal if the signal-to-noise ratio is less than a previously set size; and, if it is determined to output the digitally processed biosignal, determining the previously set biosignal classification to which the digitally processed biosignal corresponds, sorting the digitally processed biosignal according to the signal classification and outputting the digitally processed biosignal. [Effects of the Invention]

[0015] A high-resolution amplified bioactivity signal acquisition system and method according to one embodiment of the present invention has the effect of being able to variably determine the amplification size for a bioactivity signal that changes in real time, even when acquiring a low-frequency and low-resolution bioactivity signal via radar, by determining the amplification size using a pre-set noise ratio and amplification level and amplifying the signal. [Brief explanation of the drawing]

[0016] [Figure 1]It is a block diagram of an acquisition system for a high-resolution amplified bioactivity signal according to an embodiment of the present invention. [Figure 2] It is a block diagram of the bioactivity signal processing unit in FIG. 1. [Figure 3] [[ID=]6]It is a block diagram of the digital signal processing unit in FIG. 1. [Figure 4] It is a block diagram of the signal output unit in FIG. 1. [Figure 5] It is a flowchart of a method for acquiring a high-resolution amplified bioactivity signal according to an embodiment of the present invention. [Figure 6] It is a flowchart related to step S11 in FIG. 5. [Figure 7] It is a flowchart related to step S13 in FIG. 5. [Figure 8] It is a flowchart related to step S15 in FIG. 5. [Figure 9] It is a conceptual diagram related to the present invention in FIGS. 1 and 5. [Figure 10] It is an exemplary diagram of a method for setting an amplification size in the amplification size determination module of the present invention or in the step of determining the amplification size.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, some embodiments of this disclosure will be described in detail based on exemplary drawings. When assigning reference numerals to the components in each figure, it should be noted that, for the same components, as far as possible, the same numerals are used even if they are shown in different figures. Also, when explaining this embodiment, if it is recognized that a detailed explanation of known techniques related to the present invention may obscure the gist of the present invention, the detailed explanation thereof will be omitted. When terms such as "including", "having", and "comprising" mentioned in this specification are used, other parts can be added as long as "only" is not used. In this specification, a singular expression regarding a component includes plural expressions unless it clearly has a different meaning from the context.

[0018] In addition, when describing the components of this disclosure, expressions such as first, second, A, B, (a), (b), etc. can be used. These expressions are merely used to distinguish the components from other components, and the essence, order, sequence, or number of the components are not limited by these expressions. When a certain component is described as being "connected", "coupled", or "connected" to another component, the certain component may be directly connected, coupled, or connected to the other component, but it should be understood that there may also be other components connected, coupled, or connected between the components. When explaining the positional relationship between components, when two or more components are described as being "connected", "coupled", or "connected", etc., two or more components may be directly "connected", "coupled", or "connected", but it should be understood that two or more components and other components may be further "intervened" and "connected", "coupled", or "connected". Here, the other components may be included in one or more of the two or more components that are "connected", "coupled", or "connected" to each other.

[0019] When explaining the temporal flow relationship related to components, operating methods, manufacturing methods, etc., for example, when the temporal front-back relationship or flow front-back relationship is described as "after ~", "subsequent to ~", "next to ~", "before ~", etc., if "immediately" or "directly" is not used, it may include cases where they are not continuous.

[0020] On the other hand, when a numerical value or its corresponding information (e.g., level, etc.) related to a component is mentioned, even without separate notice, the numerical value or its corresponding information may be interpreted as including the error range that may be caused by various factors (e.g., process factors, internal or external impacts, noise, etc.).

[0021] Figure 1 is a block diagram of a high-resolution amplified bioactivity signal acquisition system according to one embodiment of the present invention, Figure 2 is a block diagram of the bioactivity signal processing unit of Figure 1, Figure 3 is a block diagram of the digital signal processing unit of Figure 1, and Figure 4 is a block diagram of the signal of Figure 1. output This is a block diagram of the section. Below, a high-resolution amplified bioactivity signal acquisition system according to one embodiment of the present invention will be described in detail based on Figures 1 to 4.

[0022] A high-resolution amplified bioactivity signal acquisition system 1 according to one embodiment of the present invention may be configured to acquire the user's bioactivity signal using a radar device, sort the acquired bioactivity signal into pre-set classifications, and amplify and output the signal for each classification. For this purpose, as shown in Figure 1, the high-resolution amplified bioactivity signal acquisition system 1 according to one embodiment of the present invention comprises a bioactivity signal processing unit 11, a digital signal processing unit 13, and a signal output It is formed to include part 15.

[0023] A bioactivity signal processing unit 11 according to one embodiment of the present invention is configured to acquire a user's bioactivity signal using a radar device, perform preprocessing, and generate a preprocessed bioactivity signal. For this purpose, the bioactivity signal processing unit 11 may be configured to include a bioactivity signal acquisition module 111 and a bioactivity signal preprocessing module 113, as shown in Figure 2.

[0024] The bioactivity signal acquisition module 111 is configured to acquire the user's bioactivity signal, which is information measured by radar. The bioactivity signal is configured to include the user's biosignal and activity signal. Here, the biosignal may be a signal measured for respiration, heart rate, etc., and the activity signal may be a signal measured for the user's movement. Once the bioactivity signal acquisition module 111 acquires the bioactivity signal, it can acquire the biosignal contained in the bioactivity signal as a first bioactivity signal and acquire the activity signal contained in the bioactivity signal as a second bioactivity signal.

[0025] The bioactivity signal preprocessing module 113 is configured to perform preprocessing on the bioactivity signal to generate a preprocessed bioactivity signal. Here, preprocessing can be performed on both the first and second bioactivity signals. The preprocessing performed in the bioactivity signal preprocessing module 113 may involve amplifying both the first and second bioactivity signals to a previously set size using an amplifier and applying a low-pass filter with a previously set bandwidth. Here, the previously set size may be the amplification size determined in the digital signal processing unit 13 described later, but as an exception, the amplification size initially determined may be used for the first and second bioactivity signals acquired initially.

[0026] In another embodiment of the present invention, the bioactivity signal preprocessing module 113 may also use a variable amplifier for amplifying the first and second bioactivity signals. The variable amplifier of the present invention may further include the role of a bandpass filter that acquires the first and second bioactivity signals and allows only frequencies within a pre-set band to pass through, and can amplify the frequencies within that band to a pre-set size. In the case of the pre-set band low-pass filter described above, in this embodiment, it may be configured to exclude other frequency bands if the bioactivity signal that has passed through the variable amplifier includes frequency bands other than those intended for use in the present invention.

[0027] However, the present invention is not necessarily limited thereto, and the amplification size determined in the digital signal processing unit 13 may be used for the initial amplification if it has already been set in the bioactivity signal preprocessing module 113.

[0028] The digital signal processing unit 13 is configured to generate a digitally processed biosignal by performing digital processing on the preprocessed bioactivity signal. For this purpose, the digitally processed signal unit 13 is configured to include a signal conversion module 131, a signal ratio calculation module 133, and an amplification size determination module 135, as shown in Figure 3.

[0029] The signal conversion module 131 is configured to digitize the preprocessed bioactivity signal. Here, the signal conversion module 131 may be, for example, an analog-to-digital converter (ADC). The signal conversion module 131 may also be configured to further include a bandpass filter to use the digital bioactivity signal, which is the digitized preprocessed bioactivity signal converted via the analog-to-digital converter, only for a specific frequency band. Here, the specific frequency band of the bandpass filter used in the signal conversion module 131 may be determined as different frequency bands from each other based on the first bioactivity signal and the second bioactivity signal.

[0030] The digital bioactivity signal, which is a pre-processed bioactivity signal digitized after passing through the signal conversion module 131, is used in the signal ratio calculation module 133 for checking the amplification and calculating the signal-to-noise ratio. The signal ratio calculation module 133 may be configured to check the amplification of the digital bioactivity signal and to perform a conversion of the digital bioactivity signal to calculate the signal-to-noise ratio.

[0031] To achieve this, the signal ratio calculation module 133 first obtains a digital bioactivity signal from the signal conversion module 131, then checks the amplification of the digital bioactivity signal to obtain amplification information, and then converts it back into a digital bioactivity signal to calculate the signal-to-noise ratio. The conversion used here may, for example, be the Fast Fourier Transform (FFT). The digital bioactivity signal to which the Fast Fourier Transform (FFT) has been applied is converted into a pure bioactivity signal, and the signal ratio calculation module 113 can then compare the digital bioactivity signal with the pure bioactivity signal to calculate the signal-to-noise ratio.

[0032] The signal-to-noise ratio can be used in the signal output unit 15, described later, to determine whether or not to output the digital bioactivity signal based on its ratio value. More details will be provided later.

[0033] On the other hand, once the signal-to-noise ratio is obtained, the amplification size determination module 135 may be configured to determine the amplification size by applying the amplification and signal-to-noise ratio to a pre-set algorithm. Here, the amplification size may be the amplification size set in the bioactivity signal preprocessing module 113, as described above. The amplification size determination module 135 may be configured to output the amplification size as a PWM signal and to control the amplification size by outputting a voltage that controls the amplification via an integrator filter and supplying a voltage to the amplifier of the bioactivity signal preprocessing module 113.

[0034] Figure 10 is an illustrative diagram of the amplification size determination module of the present invention or a method for setting the amplification size in the step of determining the amplification size. Referring to Figure 10, the amplification size determination module 135 according to one embodiment of the present invention operates differently depending on whether (a) it is an under-amplification, (b) it is an over-amplification, (c) optimization is required, or (d) rapid setting of the SNR level is required.

[0035] First, as shown in Figure 10a, the amplification size determination module 135 of the present invention, in the case of under-amplification, can acquire the SNR (signal-to-noise ratio) while increasing the amplification from P1 to Pn, and determine the amplification size by determining the point with the maximum SNR as the optimal amplification.

[0036] Furthermore, as shown in Figure 10b, the amplification size determination module 135 of the present invention, in the case of over-amplification, can, contrary to Figure 10a, start scanning from P1 and decrease the amplification level to Pn while acquiring the SNR, and set the point of maximum SNR as the optimal amplification level.

[0037] Furthermore, as shown in Figure 10c, the amplification size determination module 135 of the present invention may be configured to, when optimization is required, start scanning from P1 and acquire the SNR while increasing the amplification up to Pn, and set the point with the maximum SNR as the optimal amplification.

[0038] Furthermore, as shown in Figure 10d, the amplification size determination module 135 of the present invention may be configured to perform a staggered scan starting from Pn and set the point where the value obtained from the desired SNR is within a set error range as the optimal amplification level when it is necessary to quickly set the SNR level to a desired level.

[0039] Although Figures 10a to 10d illustrate only specific situations, the present invention is not limited thereto and may be configured to determine the amplification size by setting a specific SNR point as the optimal amplification level according to various settings and conditions.

[0040] The optimal amplification level described above may be determined using the analog-to-digital converter of the signal conversion module 131. The signal passing through the analog-to-digital converter is output as a signal of 0s and 1s. In this case, if a signal larger than the already set size is acquired, the analog-to-digital converter has the characteristic of outputting a digital signal of the already set size. That is, in the present invention, using this characteristic of the analog-to-digital converter, in the cases of Figures 10a and 10c, when the amplification level is increased to measure the SNR of Pn, if the same digital signal is output, the previous amplification level may be set as the optimal amplification level. Also, in the case of Figure 10b, conversely to Figures 10a and 10c, when the amplification level is gradually decreased to measure the SNR of Pn, if the same digital signal is output and a change begins, the previous amplification level may be set as the optimal amplification level.

[0041] Here, the amplification size determination module 135 according to one embodiment of the present invention can determine whether or not to change the amplification level using a decision time for changing the amplification level, and if it determines that a change in the amplification level is necessary, it can also change the amplification level.

[0042] The amplification size determination module 135 determines whether or not to change the amplification of the first and second bioactivity signals acquired using a decision time already set by the administrator. If the SNR for the bioactivity signals is acquired stably, the amplification size determination module 135 does not need to change the amplification. However, if the SNR is not acquired as the desired SNR, the amplification size determination module 135 needs to change the amplification. To give a more specific example, if the size of the bioactivity changes due to the user's movements, the size of the acquired first and second bioactivity signals will change. As a result, if the first and second bioactivity signals are amplified using the same amplification, there is a risk that an SNR different from the desired SNR will be acquired.

[0043] Therefore, before determining the amplification size using Figures 10a to 10d described above, the amplification size determination module 135 can decide whether or not to change the amplification level via a buffer (decision criterion time) for determining whether or not to change the amplification level.

[0044] Generally, analog-to-digital converters have a maximum and minimum output range. When the size of the initially acquired bioactivity signal decreases or increases, the value of the digital signal output from the analog-to-digital converter will also decrease or increase. In this case, if the size of the bioactivity signal exceeds the output range of the analog-to-digital converter, even if the bioactivity signal changes, the digital signal output after passing through the analog-to-digital converter will only output the minimum or maximum value. This may make it impossible to acquire the high-resolution bioactivity signal that we aim to derive through this invention.

[0045] Therefore, in one embodiment of the present invention, the amplification size determination module 135 can be configured to acquire a digital signal value of a biological activity signal, and if the acquired digital signal value is subsequently output as a minimum or maximum value during a buffer time which is a set judgment criterion time, it can be configured to determine that the current amplification is over-amplified or under-amplified, and to change the amplification by determining the amplification as shown in Figure 10a or Figure 10c using the determination result.

[0046] In another embodiment of the present invention, a situation requiring a rapid setting of a desired SNR, as shown in Figure 10d of the amplification size determination module 135, may, for example, be the initial setup step of System 1 of the present invention. Alternatively, a situation requiring optimization of the desired SNR setting, as shown in Figure 10b of the amplification size determination module 135, may be when the acquired bioactivity signal has a digital signal value that does not deviate from the already set amplification level reset range during the already set optimization decision time.

[0047] On the other hand, a signal relating to one embodiment of the present invention output Section 15 digitally processes biological activity signals. Obtain, The amplified signals for each already defined bioactivity signal classification Sort and output It may be formed in such a way. For this purpose, the signal of the present invention output As shown in Figure 4, unit 15 may include a digital processing bioactivity signal output presence / absence determination module 151 and a digital processing bioactivity signal output module 153.

[0048] The digital processing bioactivity signal output determination module 151 can determine whether to output a digital processing bioactivity signal if the signal-to-noise ratio is greater than or equal to a previously set size, and whether to output a digital processing bioactivity signal if the signal-to-noise ratio is less than a previously set size. In this case, if it is determined not to output a digital processing bioactivity signal, the digital processing bioactivity signal is passed to the amplification size determination module 135 described above and can be used to determine the amplification size of the digital processing bioactivity signal.

[0049] The digital processing bioactivity signal output module 153 is configured to determine the classification of the digital processing bioactivity signal to which it corresponds, sort the signal according to the classification, and output the digital processing bioactivity signal when it decides to output a digital processing bioactivity signal. The digital processing bioactivity signal output module 135 is configured to classify the digital processing bioactivity signal into a pre-set bioactivity signal classification, where the pre-set bioactivity signal classification may be, for example, a biosignal or an activity signal. The digital processing bioactivity signal output module 153 may be configured to output the digital processing bioactivity signal via a port tagged with the classification once the classification is complete.

[0050] On the other hand, Figures 5 to 8 show a method for acquiring high-resolution amplified biological activity signals according to one embodiment of the present invention. Figure 5 is a procedure diagram for the method for acquiring high-resolution amplified biological activity signals according to one embodiment of the present invention, Figure 6 is a procedure diagram relating to step (S11) of Figure 5, Figure 7 is a procedure diagram relating to step (S13) of Figure 5, and Figure 8 is a procedure diagram relating to step (S15) of Figure 5. Hereinafter, the method for acquiring high-resolution amplified biological activity signals according to one embodiment of the present invention will be described in detail based on Figures 5 to 8, and for ease of explanation, the system of Figure 1 will be used. However, the present invention is not necessarily limited thereto and is also applicable to devices or systems capable of performing similar operations.

[0051] A high-resolution amplified bioactivity signal acquisition method 10 according to one embodiment of the present invention may be configured to acquire the user's bioactivity signal using a radar device, sort the acquired bioactivity signal into pre-set categories, and amplify and output the signal for each category. For this purpose, as shown in Figure 5, a high-resolution amplified bioactivity signal acquisition method 10 according to one embodiment of the present invention includes a step of processing the bioactivity signal (S11), a step of processing the digital signal (S13), and a signal output It is formed to include the step (S15) of doing so.

[0052] In the step (S11) of processing a biological activity signal according to one embodiment of the present invention, the biological activity signal processing unit is configured to acquire the user's biological activity signal using a radar device, perform preprocessing, and generate a preprocessed biological signal. For this purpose, the step (S11) of processing a biological activity signal may be configured to include a step (S111) of acquiring a biological activity signal and a step (S113) of preprocessing the biological activity signal, as shown in Figure 6.

[0053] The step of acquiring a bioactivity signal (S111) is configured to acquire the user's bioactivity signal, which is information measured by radar. The bioactivity signal is configured to include the user's biosignal and activity signal. Here, the biosignal may be a signal measured for respiration, heart rate, etc., and the activity signal may be a signal measured for the user's movement. In the step of acquiring a bioactivity signal (S111), once the bioactivity signal is acquired, the biosignal contained in the bioactivity signal can be acquired as a first bioactivity signal, and the activity signal contained in the bioactivity signal can be acquired as a second bioactivity signal.

[0054] The step of preprocessing the biological activity signal (S113) is configured to generate a preprocessed biological activity signal by performing preprocessing on the biological activity signal. Here, the preprocessing can be performed on the first biological activity signal and the second biological activity signal, respectively. The preprocessing performed in the step of preprocessing the biological activity signal (S113) may be a process of amplifying the first biological activity signal and the second biological activity signal to a previously set size using an amplifier and applying a low-pass filter with a previously set bandwidth, respectively. Here, the previously set size may be the amplification size determined in the step of processing the digital signal (S13) described later, but as an exception, the amplification size determined at the beginning may be used for the first biological activity signal and the second biological activity signal acquired initially.

[0055] In the step of preprocessing the biological activity signal (S113) of another embodiment of the present invention, a variable amplifier may be used to amplify the first and second biological activity signals. The variable amplifier of the present invention may further include the role of a bandpass filter that acquires the first and second biological activity signals and allows only frequencies within a previously set band to pass through, and can amplify the frequencies within that band to a previously set size. In the case of the previously set low-pass filter described above, in this embodiment, if the biological activity signal that has passed through the variable amplifier includes frequency bands other than the frequency band intended to be used in the present invention, it may be configured to exclude those frequency bands.

[0056] However, the present invention is not necessarily limited thereto, and if the step of preprocessing the biological activity signal (S113) has already been set, the amplification size determined in the step of processing the digital signal (S13) may also be used for the initial amplification.

[0057] The step of processing a digital signal (S13) is configured to generate a digitally processed bio-signal by performing digital processing on the pre-processed bio-activity signal in the digital signal processing unit. For this purpose, the step of processing a digital signal (S13) is configured to include a step of performing signal conversion (S131), a step of calculating the signal ratio (S133), and a step of determining the amplification size (S135), as shown in Figure 7.

[0058] The signal conversion step (S131) ​​is configured to digitize the preprocessed biological activity signal. Here, the signal conversion step (S131) ​​may be, for example, an analog-to-digital converter (ADC). Furthermore, the signal conversion step (S131) ​​may be configured to further include a bandpass filter to use the digital biological activity signal, which is the digitized preprocessed biological activity signal converted via the analog-to-digital converter, only for a specific frequency band. Here, the specific frequency band of the bandpass filter used in the signal conversion step (S131) ​​may be determined to be different frequency bands from each other depending on the first biological activity signal and the second biological activity signal.

[0059] The digital bioactivity signal, which is a pre-processed bioactivity signal digitized after passing through the signal conversion step (S131), is used in the step of calculating the signal ratio (S133) to verify the amplification and calculate the signal-to-noise ratio. The step of calculating the signal ratio (S133) may be configured to verify the amplification of the digital bioactivity signal, convert the digital bioactivity signal, and calculate the signal-to-noise ratio.

[0060] In the step of calculating the signal ratio (S133), first, if a digital bioactivity signal is obtained from the signal conversion step (S131), the amplification of the digital bioactivity signal can be checked and amplification information can be obtained, and then the signal-to-noise ratio can be calculated by converting it back to a digital bioactivity signal. The conversion used here may, for example, be the Fast Fourier Transform (FFT). The digital bioactivity signal to which the Fast Fourier Transform (FFT) has been applied is converted into a pure bioactivity signal, and in the step of calculating the signal ratio (S133), the signal-to-noise ratio can be calculated by comparing the digital bioactivity signal with the pure bioactivity signal.

[0061] The signal-to-noise ratio can be used in the step of outputting the signal (S15), described later, to determine whether or not to output the digital bioactivity signal based on its ratio value. More details will be provided later.

[0062] On the other hand, once the signal-to-noise ratio is obtained, the step of determining the amplification size (S135) may be configured to determine the amplification size by applying the amplification and signal-to-noise ratio to a pre-set algorithm. Here, the amplification size may be the amplification size set in the step of pre-processing the biological activity signal (S113) as described above. The step of determining the amplification size (S135) may be configured to output the amplification size as a PWM signal and control the amplification size by outputting a voltage that controls the amplification via an integrator filter to the amplifier in the step of pre-processing the biological activity signal (S113).

[0063] Figure 10 is an illustrative diagram of the amplification size determination module or a method for setting the amplification size in the step of determining the amplification size according to the present invention. Referring to Figure 10, the step of determining the amplification size (S135) according to one embodiment of the present invention is performed in such a manner that it differs from one another depending on whether (a) it is an under-amplification, (b) it is an over-amplification, (c) optimization is required, or (d) rapid setting to the SNR level is required.

[0064] First, in the step of determining the amplification size (S135) of the present invention, as shown in Figure 10a, if the amplification is insufficient, the signal-to-noise ratio (SNR) can be obtained while increasing the amplification from P1 to Pn, and the point with the maximum SNR can be determined as the optimal amplification to determine the amplification size.

[0065] Furthermore, in the step of determining the amplification size (S135) of the present invention, as shown in Figure 10b, if there is excessive amplification, the SNR can be acquired while decreasing the amplification from P1 to Pn, contrary to Figure 10a, and the point with the maximum SNR can be set as the optimal amplification.

[0066] Furthermore, the step of determining the amplification size (S135) of the present invention may be configured, as shown in Figure 10c, to start scanning from P1 and increase the amplification up to Pn while acquiring the SNR, and to set the point with the maximum SNR as the optimal amplification, if optimization is required.

[0067] Furthermore, the step of determining the amplification size (S135) of the present invention may be configured, as shown in Figure 10d, to quickly set the desired SNR level, by performing a staggered scan starting from Pn and setting the point where the value obtained from the desired SNR is within a set error range as the optimal amplification level.

[0068] Although Figures 10a to 10d illustrate only specific situations, the present invention is not limited thereto and may be configured to determine the amplification size by setting a specific SNR point as the optimal amplification level according to various settings and conditions.

[0069] The optimal amplification level described above can be determined using the analog-to-digital converter in the signal conversion step (S131). The signal passing through the analog-to-digital converter is output as a signal of 0s and 1s. At this time, if a signal larger than the already set size is acquired, the analog-to-digital converter has the characteristic of outputting a digital signal of the already set size. That is, in the present invention, using this characteristic of the analog-to-digital converter, in the cases of Figures 10a and 10c, when the amplification level is increased and the SNR of Pn is measured, if the same digital signal is output, the previous amplification level may be set as the optimal amplification level. Also, in the case of Figure 10b, conversely to Figures 10a and 10c, when the amplification level is gradually decreased and the SNR of Pn is measured, if the same digital signal is output and a change begins, the previous amplification level may be set as the optimal amplification level.

[0070] Here, the step of determining the amplification size according to one embodiment of the present invention (S135) may also involve determining whether or not to change the amplification level using a decision time for changing the amplification level, and if it is determined that a change in the amplification level is necessary, the amplification level may be changed.

[0071] In the step of determining the amplification size (S135), the administrator determines whether to change the amplification of the first and second bioactivity signals acquired using the judgment time already set by the administrator. If the SNR for the bioactivity signals is acquired stably, there is no need to change the amplification in the step of determining the amplification size (S135). However, if the SNR is not acquired as the desired SNR, it is necessary to change the amplification in the step of determining the amplification size (S135). To give a more specific example, if the size of the bioactivity changes due to the user's movements, the size of the acquired first and second bioactivity signals will change. As a result, if the first and second bioactivity signals are amplified using the same amplification, an SNR different from the desired SNR may be acquired.

[0072] Therefore, in the step of determining the amplification size (S135), before determining the amplification size using Figures 10a to 10d described above, it is possible to decide whether or not to change the amplification level via a buffer (decision criterion time) for deciding whether or not to change the amplification level.

[0073] Generally, analog-to-digital converters have a maximum and minimum output range. When the size of the initially acquired bioactivity signal decreases or increases, the value of the digital signal output from the analog-to-digital converter also decreases or increases. In this case, if the size of the bioactivity signal exceeds the output range of the analog-to-digital converter, even if the bioactivity signal changes, the digital signal output after passing through the analog-to-digital converter will only output the minimum or maximum value. This may make it impossible to acquire the high-resolution bioactivity signal that we aim to derive through this invention.

[0074] Therefore, in one embodiment of the present invention, the step of determining the amplification size (S135) may be configured to acquire a digital signal value of the biological activity signal, and if the acquired digital signal value is subsequently output as a minimum or maximum value during a buffer time which is an already set judgment criterion time, it may be determined that the current amplification is over-amplified or under-amplified, and the amplification may be changed by determining the amplification as shown in Figure 10a or Figure 10c using the determination result.

[0075] In other embodiments of the present invention, a situation in which a rapid setting of a desired SNR is required, as shown in Figure 10d of the step of determining the amplification size (S135), may be, for example, the initial setup step of Method 10 of the present invention. Furthermore, a situation in which optimization of the desired SNR setting is required, as shown in Figure 10b of the step of determining the amplification size (S135), may be when the acquired biological activity signal has a digital signal value that does not deviate from the already set amplification level reset range during the already set optimization decision time.

[0076] On the other hand, the signal according to one embodiment of the present invention output Step (S15) is to signal output In the department, digital processing of biological activity signals Obtain, The amplified signals for each already defined bioactivity signal classification Sort and output It may be formed in such a way. For this purpose, the signal of the present invention output Step (S15) may include, as shown in Figure 8, a step (S151) to determine whether or not to output a digitally processed biological activity signal and a step (S153) to output a digitally processed biological activity signal.

[0077] The step of determining whether or not to output a digitally processed biological activity signal (S151) can determine whether or not to output a digitally processed biological activity signal if the signal-to-noise ratio is greater than or equal to a previously set size, and whether or not to output a digitally processed biological activity signal if the signal-to-noise ratio is less than or equal to a previously set size. If it is determined that a digitally processed biological activity signal should not be output, the digitally processed biological activity signal can be passed on to the step of determining the amplification size (S135) described above and used to determine the amplification size of the digitally processed biological activity signal.

[0078] The step of outputting a digitally processed bioactivity signal (S153) is configured to determine the corresponding already set bioactivity signal classification when it is decided to output a digitally processed bioactivity signal, sort the signal according to the signal classification, and output the digitally processed bioactivity signal. The digitally processed bioactivity signal output module 135 is configured to classify the digitally processed bioactivity signal into an already set bioactivity signal classification, where the already set bioactivity signal classification may be, for example, a biosignal, an activity signal, etc. The step of outputting a digitally processed bioactivity signal (S153) may be configured to output the digitally processed bioactivity signal via a port tagged with the classification once the classification is completed.

[0079] On the other hand, Figure 9 is a conceptual diagram relating to the present invention shown in Figures 1 and 5. Figure 9 shows the flow (concept) from when a biological activity signal acquired via radar is amplified and output using the system and method of the present invention. Referring to Figure 9, the system and method of the present invention first acquires a biological activity signal, including a biological signal and an activity signal, using radar. The acquired biological signal and activity signal are shown as I and Q, respectively, in Figure 9 for ease of distinction. The biological signal (first biological activity signal) and the activity signal (second biological activity signal) are each amplified via an amplifier. Here, the size of the amplification may be determined using a previously set amplification value, or it may be determined using the signal-to-noise ratio of the biological activity signal.

[0080] The amplified bioactivity signal is filtered to remove a certain frequency band. Here, the filter may be a low-pass filter. The bioactivity signal, after passing through the low-pass filter to remove signals below a set frequency band, is converted to a digital signal through an analog-to-digital converter, and then transformed through a band-pass filter to retain only a specific frequency band. By measuring the amplification of the digital bioactivity signal with only the specific frequency band remaining, the present invention performs an FFT transformation on the digital bioactivity signal and obtains the signal-to-noise ratio using the FFT transformation result. Having obtained the signal-to-noise ratio and amplification, the present invention may be configured to obtain the optimal amplification using the two pieces of information and control the amplification by outputting the obtained amplification via a pulse-width modulation (PWM) signal to control the amplifier voltage.

[0081] On the other hand, if the signal-to-noise ratio is greater than or equal to a previously set size, the present invention is configured to output the digital bioactivity signal without changing the amplification, and can output the digital bioactivity signal to different ports based on signal classification.

[0082] Although one embodiment of the present invention has been described above, the concept of the present invention is not limited in any way to the embodiments disclosed in this specification. Those skilled in the art who understand the concept of the present invention should be able to easily propose other embodiments by adding, changing, deleting, or adding components, all within the same scope of the present invention.

Claims

1. A bioactivity signal processing unit that uses a radar device to acquire the user's bioactivity signal, performs preprocessing by amplifying it to a pre-set size using an amplifier to generate a pre-processed bioactivity signal, and A digital signal processing unit that performs digital processing on the aforementioned pre-processed biological activity signal to generate a digitally processed biological activity signal, A signal output unit that acquires the digitally processed biological activity signals and sorts and outputs the amplified signals according to the already set biological activity signal classifications, Equipped with, The aforementioned digital signal processing unit is A signal conversion module that digitizes the pre-processed biological activity signal, A signal ratio calculation module that checks the amplification of the digitally processed biological activity signal and performs a conversion of the digitally processed biological activity signal to calculate the signal-to-noise ratio, An amplification size determination module that determines the previously set size by applying the amplification factor and the signal-to-noise ratio to a previously set algorithm, Equipped with, The signal output unit is, A digital processing bioactivity signal output determination module that determines whether to output the digital processing bioactivity signal if the signal-to-noise ratio is greater than or equal to a previously set size, and whether to output the digital processing bioactivity signal if the signal-to-noise ratio is less than a previously set size, When it is decided to output the aforementioned digitally processed biological activity signal, the digitally processed biological activity signal output module determines the previously set biological activity signal classification to which the digitally processed biological activity signal corresponds, sorts the signal according to the signal classification, and outputs the digitally processed biological activity signal. A high-resolution, amplified bioactivity signal acquisition system equipped with [specific features / features].

2. The aforementioned biological activity signal processing unit is A bioactivity signal acquisition module that acquires the bioactivity signal, which includes a first bioactivity signal that is a biological signal and a second bioactivity signal that is an activity signal, A bioactivity signal preprocessing module that performs the preprocessing on the bioactivity signal to generate the preprocessed bioactivity signal, A high-resolution amplified bioactivity signal acquisition system according to claim 1, comprising:

3. The system for acquiring high-resolution amplified biological activity signals according to claim 2, wherein the preprocessing includes applying a low-pass filter of a pre-set bandwidth.

4. The bioactivity signal processing unit acquires the user's bioactivity signal using a radar device, performs preprocessing by amplifying it to a pre-set size using an amplifier to generate a pre-processed bioactivity signal, and processes the bioactivity signal. The steps include: processing a digital signal in a digital signal processing unit to generate a digitally processed bioactivity signal by performing digital processing on the preprocessed bioactivity signal; The signal output unit acquires the digitally processed biological activity signal, sorts the amplified signal according to the already set biological activity signal classification and outputs it; Includes, The step of processing the aforementioned digital signal is: The steps include: digitizing the pre-processed biological activity signal, The steps include: confirming the amplification of the digitally processed biological activity signal, converting the digitally processed biological activity signal, and calculating the signal ratio to determine the signal-to-noise ratio; A step of determining the amplification size by applying the amplification factor and the signal-to-noise ratio to a previously set algorithm to determine the previously set size, Includes, The step of outputting the aforementioned signal is: A step of determining whether or not to output a digitally processed biological activity signal, wherein if the signal-to-noise ratio is greater than or equal to a previously set size, the digitally processed biological activity signal is output, and if the signal-to-noise ratio is less than a previously set size, the digitally processed biological activity signal is not output. If it is decided to output the digitally processed biological activity signal, the steps include: determining the already set biological activity signal classification to which the digitally processed biological activity signal corresponds, sorting the signal according to the signal classification and outputting the digitally processed biological activity signal; A method for acquiring high-resolution, amplified bioactivity signals, including [specific data / features].

5. The step of processing the aforementioned biological activity signal is: A step of acquiring a biological activity signal, which includes a first biological activity signal that is a biological signal and a second biological activity signal that is an activity signal. The steps include: performing the preprocessing on the biological signal to generate the preprocessed biological activity signal; A method for acquiring a high-resolution amplified bioactivity signal according to claim 4, including the following:

6. The method for acquiring a high-resolution amplified biological activity signal according to claim 5, wherein the preprocessing includes applying a low-pass filter of a pre-set bandwidth.

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