System and method for acquiring high-resolution amplified biological activity signals - Patents.com

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 biological activity signal, and in particular to a system and method for acquiring a high-resolution amplified biological activity signal that is configured to control the amplification level based on the biological activity signal acquired so as to have a resolution above a standard that allows information regarding a user's biological activity acquired via radar to be analyzed, and then output the amplified signal. [Background technology]

[0002] In recent years, the population that needs care or attention has been increasing in Korean society. The population that needs care or attention can be defined as the population that needs help in case of an emergency or has no one living with them, and can include, for example, the elderly, the disabled, and those living alone. According to a recent survey, the elderly population exceeded 9 million, and the population of those living alone and those with disabilities exceeded 6.6 million and 2.6 million, respectively. In addition, the population of people who died alone, where they were found after their death without a cohabitant, has also exceeded 10,000.

[0003] In addition, with the recent increase in personal terminals and the increasing demand for personal health management, a wide variety of solutions or applications that collect personal health care data and use the data to provide health management content customized for each individual have recently appeared one after another. In order to collect such personal health care data, a wearable device or a mountable device is used. When using a wearable device, health care data is obtained from a part close to the body, so preprocessing of the measured data is often unnecessary. However, in the case of a mountable device, since the user's physical activity information is measured from a long distance, there is a problem that not only is the probability of noise being mixed into the measured data high, but it is also difficult to distinguish small differences. Summary of the Invention [Problem to be solved by the invention]

[0004] In order to solve the problems of the conventional technology as described above, one embodiment of the present invention aims to provide a system and method for acquiring a high-resolution amplified biological activity signal, which is capable of variably determining the amplification size to suit the biological activity signal that changes in real time by determining the amplification size using a pre-set noise ratio and amplification degree and amplifying the signal, even when a low-frequency and low-resolution biological activity signal is acquired via radar. [Means for solving the problem]

[0005] According to one aspect of the present invention for solving the above-mentioned problems, the present invention includes a biosignal processing unit that acquires a 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 a signal extraction unit that outputs the digitally processed biosignal and extracts amplified signals for each of the biosignal classifications that have already been set.

[0006] The biosignal processing unit may include a biosignal acquisition module that acquires the biosignals including 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 biosignals to generate the preprocessed biosignal.

[0007] The pre-processing may be a process of amplifying each of the first biological signal and the second biological signal to a previously set size using an amplifier and applying a low-pass filter of a previously set band.

[0008] The digital signal processing unit may include a signal conversion module that digitizes the preprocessed biosignal, a signal ratio calculation module that checks the amplification degree of a digital biosignal, which is the digitized preprocessed biosignal, converts the digital biosignal, and calculates a signal-to-noise ratio, and an amplification size determination module that applies the amplification degree and the signal-to-noise ratio to a pre-set algorithm to determine the pre-set size.

[0009] The signal extraction unit may include a digitally processed bio-signal output determination module that decides to output the digital bio-signal when the signal-to-noise ratio is equal to or greater than a pre-set size, and decides not to output the digital bio-signal when the signal-to-noise ratio is less than a pre-set size, and a digitally processed bio-signal output module that, when it has been decided to output the digitally processed bio-signal, determines the pre-set bio-signal classification to which the digitally processed bio-signal corresponds, and outputs the digitally processed bio-signal by sorting it according to the signal classification.

[0010] According to one aspect of the present invention, there is provided a method for acquiring a high-resolution amplified biosignal, which includes the steps of acquiring a biosignal of a user using a radar device in a biosignal processing unit, processing the biosignal by performing preprocessing to generate a preprocessed biosignal, processing a digital signal by performing digital processing on the preprocessed biosignal in a digital signal processing unit to generate a digitally processed biosignal, and outputting the digitally processed biosignal in a signal extraction unit to extract a signal that extracts an amplified signal for each of the biosignal classifications that have been previously set.

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

[0012] The pre-processing may be a process of amplifying each of the first biological signal and the second biological signal to a previously set size using an amplifier and applying a low-pass filter of a previously set band.

[0013] The step of processing the digital signal may include a step of digitizing the pre-processed biosignal, a step of calculating a signal ratio by checking an amplification degree of a digital biosignal, which is the digitized pre-processed biosignal, and converting the digital biosignal to calculate a signal-to-noise ratio, and a step of determining an amplification size by applying the amplification degree and the signal-to-noise ratio to a pre-set algorithm to determine the pre-set size.

[0014] The step of extracting the signal may include a step of determining whether or not to output a digitally processed biosignal, which determines whether or not to output the digital biosignal if the signal-to-noise ratio is equal to or greater than a pre-set size, and determines not to output the digital biosignal if the signal-to-noise ratio is less than a pre-set size, and a step of outputting a digitally processed biosignal, which determines the pre-set biosignal classification to which the digitally processed biosignal corresponds, and sorts the digitally processed biosignal by signal classification and outputs the digitally processed biosignal. Effect of the Invention

[0015] The system and method for acquiring high-resolution amplified biological activity signals according to one embodiment of the present invention has the advantage that, even when low-frequency and low-resolution biological activity signals are acquired via radar, the amplification size is determined using a pre-set noise ratio and amplification degree, and the signal is amplified, thereby making it possible to variably determine the amplification size in response to biological activity signals that change in real time. [Brief description of the drawings]

[0016] [Figure 1] 1 is a block diagram of a system for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention; [Diagram 2] 2 is a block diagram of a life activity signal processing unit in FIG. 1. [Diagram 3] FIG. 2 is a block diagram of the digital signal processing unit of FIG. [Figure 4]FIG. 2 is a block diagram of a signal extraction unit in FIG. [Diagram 5] FIG. 2 is a flow diagram of a method for obtaining a high-resolution amplified biological activity signal according to an embodiment of the present invention. [Figure 6] FIG. 6 is a flowchart showing the procedure for step S11 in FIG. [Figure 7] FIG. 6 is a flowchart showing the procedure for step S13 in FIG. [Figure 8] FIG. 6 is a flowchart showing the procedure for step S15 in FIG. [Figure 9] FIG. 6 is a conceptual diagram relating to the present invention of FIG. 1 and FIG. 5. [Figure 10] FIG. 2 is an exemplary diagram of a method for setting the amplification size in the amplification size determination module or step of determining the amplification size of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Some embodiments of this disclosure will be described in detail below with reference to the drawings. When referring to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible, even if they are shown in different drawings. In addition, when describing this embodiment, if it is recognized that a specific description of a known technology related to the present invention may make the gist of the present invention unclear, the detailed description will be omitted. When "includes," "has," "has," and the like are used in this specification, other parts can be added because "only" is not used. In this specification, a singular expression relating to a component includes a plural expression unless it clearly has another meaning in the context.

[0018] In addition, phrases such as 1, 2, A, B, (a), (b) may be used to describe components of this disclosure. These phrases are merely used to distinguish the components from other components, and do not limit the nature, order, sequence, or number of the components. When a component is described as being "coupled", "bonded", or "connected" to another component, it should be understood that the component may be directly coupled, bonded, or connected to the other component, but that there may also be other components coupled, bonded, or connected between the components. When describing the positional relationship between components, when two or more components are described as being "coupled", "bonded", or "connected", it should be understood that the two or more components may be directly "coupled", "bonded", or "connected", but that there may also be an "intervening" between the two or more components and other components to be "coupled", "bonded", or "connected". Here, other components may be included in one or more of two or more components that are "coupled," "coupled," or "connected" to one another.

[0019] When describing a temporal sequence relating to components, methods of operation, methods of production, etc., when a temporal or flow sequence is described using, for example, "after," "following," "next to," or "before," it may include cases where the sequences are not consecutive, since "immediately" or "directly" is not used.

[0020] On the other hand, when a numerical value or its corresponding information (e.g., a level, etc.) relating to a component is mentioned, the numerical value or its corresponding information may be interpreted as including an error range that may occur due to various factors (e.g., process factors, internal or external impacts, noise, etc.) unless otherwise specified.

[0021] Fig. 1 is a block diagram of a system for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention, Fig. 2 is a block diagram of a biological activity signal processing unit of Fig. 1, Fig. 3 is a block diagram of a digital signal processing unit of Fig. 1, and Fig. 4 is a block diagram of a signal extraction unit of Fig. 1. The system for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention will be described in detail below with reference to Figs. 1 to 4.

[0022] The system 1 for acquiring high-resolution amplified biological activity signals according to an embodiment of the present invention may be configured to acquire biological activity signals of a user using a radar device, classify the acquired biological activity signals into preset categories, and amplify and output the signals for each category. For this purpose, the system 1 for acquiring high-resolution amplified biological activity signals according to an embodiment of the present invention is configured to include a biological activity signal processing unit 11, a digital signal processing unit 13, and a signal extraction unit 15, as shown in FIG. 1.

[0023] The biological activity signal processing unit 11 according to an embodiment of the present invention is configured to acquire a biological activity signal of a user using a radar device, perform pre-processing, and generate a pre-processed biological signal. To this end, the biological activity signal processing unit 11 may be configured to include a biological activity signal acquisition module 111 and a biological activity signal pre-processing module 113, as shown in FIG. 2.

[0024] The biological activity signal acquisition module 111 is configured to acquire a biological activity signal of a user, which is information measured by a radar. The biological activity signal is configured to include a biological signal and an activity signal of the user. Here, the biological signal may be a signal measured for breathing, heart rate, etc., and the activity signal may be a signal measured for the movement of the user. If the biological activity signal acquisition module 111 acquires the biological activity signal, it can acquire the biological signal included in the biological activity signal as a first biological activity signal, and acquire the activity signal included in the biological activity signal as a second biological activity signal.

[0025] The bioactivity signal preprocessing module 113 is configured to perform preprocessing on the bioactivity signal to generate a preprocessed bioactivity signal. Here, the preprocessing can be performed on each of the first bioactivity signal and the second bioactivity signal. The preprocessing performed in the bioactivity signal preprocessing module 113 may be a process of amplifying each of the first bioactivity signal and the second bioactivity signal to a previously set size using an amplifier and applying a low-pass filter of a previously set band. Here, the previously set size may be an amplification size determined in the digital signal processing unit 13 described later, but an exception may be made for the first bioactivity signal and the second bioactivity signal that are acquired initially, in which case the amplification size that is initially determined may be used.

[0026] In another embodiment of the present invention, the bioactivity signal pre-processing module 113 may also use a variable amplifier to amplify the first bioactivity signal and the second bioactivity signal. The variable amplifier of the present invention may further include a bandpass function to obtain the first bioactivity signal and the second bioactivity signal and pass only the frequencies of a pre-set band, and may amplify the frequencies of the band to a pre-set size. In addition, in the case of the low-pass filter of the pre-set band described above, in this embodiment, if the bioactivity signal that has passed through the variable amplifier includes a frequency band other than the frequency band to be used in the present invention, the low-pass filter may be formed to exclude the frequency band.

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

[0028] The digital signal processing unit 13 is configured to perform digital processing on the pre-processed biological activity signal to generate a digital processed biological signal. For this purpose, the digital signal processing 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 FIG.

[0029] The signal conversion module 131 is configured to digitize the pre-processed biological activity signal. Here, the signal conversion module 131 may be, for example, an analog-to-digital converter (ADC). The signal conversion module 131 may further include a band-pass filter to use the digital biological activity signal, which is the digitized pre-processed biological activity signal converted through the analog-to-digital converter, only for a specific frequency band. Here, the specific frequency band of the band-pass filter used in the signal conversion module 131 may be determined as a different frequency band based on the first biological activity signal and the second biological activity signal.

[0030] The digital biological activity signal, which is a pre-processed biological activity signal digitized through the signal conversion module 131, is used to check the amplification and calculate the signal-to-noise ratio in the signal ratio calculation module 133. The signal ratio calculation module 133 may be configured to check the amplification of the digital biological activity signal, convert the digital biological activity signal, and calculate the signal-to-noise ratio.

[0031] For this purpose, the signal ratio calculation module 133 first obtains the digital life activity signal from the signal conversion module 131, checks the amplification of the digital life activity signal to obtain amplification information, and then converts the digital life activity signal to calculate the signal-to-noise ratio. The conversion used here may be, for example, a fast Fourier transform (FFT). The digital life activity signal to which the fast Fourier transform (FFT) is applied is converted into a pure life activity signal, and the signal ratio calculation module 113 can compare the digital life activity signal with the pure life activity signal to calculate the signal-to-noise ratio.

[0032] The signal-to-noise ratio can be used to determine whether or not to output the digital life activity signal based on the ratio value in the signal output unit 15 described later, and more detailed information will be provided later.

[0033] Meanwhile, if 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 degree and the signal-to-noise ratio to a pre-set algorithm. Here, the amplification size may be the amplification size set in the bioactivity signal pre-processing module 113 as described above. The amplification size determination module 135 may be configured to output the amplification size as a PWM signal and control the amplification size by outputting a voltage capable of controlling the amplification degree via an integrator filter to apply the voltage to the amplifier of the bioactivity signal pre-processing module 113.

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

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

[0036] In addition, as shown in FIG. 10b, in the case of over-amplification, the amplification size determination module 135 of the present invention can obtain the SNR by starting the scan from P1 and decreasing the amplification to Pn, in the opposite manner to FIG. 10a, and set the maximum SNR point as the optimal amplification.

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

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

[0039] Although Figures 10a to 10d only describe a specific situation, 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 degree depending on various settings and conditions.

[0040] The above-mentioned optimum amplification degree may be determined using an analog-digital converter of the signal conversion module 131. A signal passing through the analog-digital converter is output as a signal of 0 and 1. At this time, when a signal of a size equal to or larger than a preset size is acquired, the analog-digital converter has a feature of outputting a digital signal of a preset size. That is, in the present invention, using such a feature of the analog-digital converter, when the amplification degree is increased and the SNR of Pn is measured in the case of FIG. 10a and FIG. 10c, if the same digital signal is output, the immediately preceding amplification degree may be set as the optimum amplification degree. Also, in the case of FIG. 10b, conversely to FIG. 10a and FIG. 10c, when the amplification degree is gradually decreased and the SNR of Pn is measured, if the same digital signal is output and a change begins, the immediately preceding amplification degree may be set as the optimum amplification degree.

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

[0042] The amplification size determination module 135 determines whether or not to change the amplification of the first and second biological activity signals acquired using a judgment time previously set by the administrator. If the SNR of the biological activity signal is acquired stably, the amplification size determination module 135 does not need to change the amplification, but if the SNR is not acquired as a desired SNR, the amplification size determination module 135 needs to change the amplification. To give a more specific example, if the biological activity size changes due to the movement of the user, the size of the acquired first and second biological activity signals will be changed, and therefore, if the first and second biological activity signals are amplified using the same amplification, an SNR different from the desired SNR may be acquired.

[0043] Therefore, before determining the size of the amplification using the above-mentioned Figures 10a to 10d, the amplification size determination module 135 can determine whether or not to change the amplification degree via a buffer (criterion time) for determining whether or not to change the amplification degree.

[0044] Generally, an analog-digital converter has a maximum value and a minimum value that can be output. When the size of the biological activity signal that is first obtained becomes smaller or larger, the value of the digital signal output from the analog-digital converter also becomes smaller or larger. In this case, if the size of the biological activity signal deviates from the output range of the analog-digital converter, even if the biological activity signal changes, the digital signal that passes through the analog-digital converter and is output will only output a minimum value or a maximum value, which may result in a situation where it is impossible to obtain the high-resolution biological activity signal that is to be derived through the present 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 continuously output as a minimum or maximum value during a buffer time which is a previously set judgment reference time, determine that the current amplification is over-amplified or under-amplified, and use the judgment result to determine the amplification as shown in FIG. 10a or FIG. 10c to change the amplification.

[0046] In another embodiment of the present invention, a situation where a quick desired SNR setting as shown in Fig. 10d of the amplification size determination module 135 is required may be, for example, an initial setting step of the system 1 of the present invention. Also, a situation where an optimization of a desired SNR setting as shown in Fig. 10b of the amplification size determination module 135 is required may be when the acquired biological activity signal has a digital signal value that does not deviate from a previously set amplification reset range during a previously set optimization judgment time.

[0047] Meanwhile, the signal extracting unit 15 according to an embodiment of the present invention may be configured to output digitally processed biological activity signals and extract amplified signals for each of the previously set biological activity signal classifications. To this end, the signal extracting unit 15 of the present invention may include a digitally processed biological activity signal output presence / absence determination module 151 and a digitally processed biological activity signal output module 153, as shown in FIG.

[0048] The digitally processed life activity signal output determination module 151 can determine to output the digitally processed life activity signal when the signal-to-noise ratio is equal to or greater than a preset size, and determine not to output the digitally processed life activity signal when the signal-to-noise ratio is less than a preset size. Here, when it is determined not to output the digitally processed life activity signal, the digitally processed life activity signal is passed to the above-mentioned amplification size determination module 135 and can be used to determine the amplification size of the digitally processed life activity signal.

[0049] When the digitally processed vital activity signal output module 153 determines to output the digitally processed vital activity signal, the digitally processed vital activity signal is configured to determine a pre-defined vital activity signal classification to which the digitally processed vital activity signal corresponds, and to output the digitally processed vital activity signal by classifying the digitally processed vital activity signal according to the signal classification. The digitally processed vital activity signal output module 135 is configured to classify the digitally processed vital activity signal into a pre-defined vital activity signal classification, where the pre-defined vital activity signal classification may be, for example, a vital signal, an activity signal, etc. The digitally processed vital activity signal output module 153 may be configured to output the digitally processed vital activity signal through a port tagged with the classification once the classification is performed and completed.

[0050] Meanwhile, Fig. 5 to Fig. 8 show a method for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention. Fig. 5 is a flow chart of a method for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention, Fig. 6 is a flow chart of step (S11) of Fig. 5, Fig. 7 is a flow chart of step (S13) of Fig. 5, and Fig. 8 is a flow chart of step (S15) of Fig. 5. In the following, based on Fig. 5 to Fig. 8, a method for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention will be described in detail, and for ease of explanation, the system of Fig. 1 will be used. However, the present invention is not necessarily limited thereto, and can also be applied to a device or system capable of performing a similar operation.

[0051] The method 10 for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention may be formed to acquire a biological activity signal of a user using a radar device, classify the acquired biological activity signal into preset classifications, and amplify and output the signal for each classification. For this purpose, the method 10 for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention is formed to include a step of processing a biological activity signal (S11), a step of processing a digital signal (S13), and a step of extracting a signal (S15), as shown in FIG. 5.

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

[0053] The step of acquiring a biological activity signal (S111) is formed to acquire a biological activity signal of a user, which is information measured by a radar. The biological activity signal is formed to include a biological signal and an activity signal of the user. Here, the biological signal may be a signal measured for breathing, heart rate, etc., and the activity signal may be a signal measured for the movement of the user. If the step of acquiring a biological activity signal (S111) acquires a biological activity signal, the biological signal included in the biological activity signal can be acquired as a first biological activity signal, and the activity signal included in the biological activity signal can be acquired as a second biological activity signal.

[0054] The step (S113) of preprocessing the life activity signal is formed to perform preprocessing on the life activity signal to generate a preprocessed life activity signal. Here, the preprocessing can be performed on each of the first life activity signal and the second life activity signal. The preprocessing performed in the step (S113) of preprocessing the life activity signal may be a process of amplifying each of the first life activity signal and the second life activity signal to a previously set size using an amplifier and applying a low-pass filter of a previously set band. Here, the previously set size may be an amplification size determined in the step (S13) of processing a digital signal described later, but an initially determined amplification size may be used except for the first life activity signal and the second life activity signal that are initially acquired.

[0055] In the step (S113) of pre-processing the biological activity signal in another embodiment of the present invention, a variable amplifier can be used to amplify the first biological activity signal and the second biological activity signal. The variable amplifier of the present invention may further include a bandpass function for acquiring the first biological activity signal and the second biological activity signal and passing only frequencies of a pre-set band, and can amplify the frequencies of the band to a pre-set size. In addition, in the case of the low-pass filter of the pre-set band described above, in this embodiment, if the biological activity signal that has passed through the variable amplifier includes a frequency band other than the frequency band to be used in the present invention, the low-pass filter may be formed to exclude the frequency band.

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

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

[0058] The signal conversion step (S131) ​​is configured to digitize the pre-processed biological activity signal. Here, the signal conversion step (S131) ​​may be, for example, an analog-to-digital converter (ADC). Also, the signal conversion step (S131) ​​may be configured to further include a band-pass filter to use the digital biological activity signal, which is the digitized pre-processed biological activity signal converted through the analog-to-digital converter, only for a specific frequency band. Here, the specific frequency band of the band-pass filter used in the signal conversion step (S131) ​​may be determined as a different frequency band depending on the first biological activity signal and the second biological activity signal.

[0059] The digital biological activity signal, which is a pre-processed biological activity signal digitized through the signal conversion step (S131), is used to check the amplification level and calculate the signal-to-noise ratio in the signal ratio calculation step (S133). The signal ratio calculation step (S133) may be configured to check the amplification level of the digital biological activity signal, convert the digital biological activity signal, and calculate the signal-to-noise ratio.

[0060] For this purpose, the step of calculating the signal ratio (S133) may first obtain a digital life activity signal from the step of performing signal conversion (S131), and then convert the digital life activity signal to a digital life activity signal to calculate the signal-to-noise ratio. The conversion used here may be, for example, a fast Fourier transform (FFT). The digital life activity signal to which the fast Fourier transform (FFT) has been applied is converted into a pure life activity signal, and in the step of calculating the signal ratio (S133), the digital life activity signal and the pure life activity signal are compared to calculate the signal-to-noise ratio.

[0061] The signal-to-noise ratio can be used to determine whether or not to output the digital life activity signal based on the ratio value in the step of outputting a signal (S15) described later, and more detailed information will be provided later.

[0062] Meanwhile, if 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 degree and the signal-to-noise ratio to a pre-set algorithm. Here, the amplification size may be the amplification size set in the step of performing pre-processing of 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 applying a voltage to the amplifier in the step of performing pre-processing of the biological activity signal (S113) by outputting a voltage capable of controlling the amplification degree via an integrator filter.

[0063] 10 is an exemplary diagram of an amplifier size determination module or a method of setting an amplifier size in the step of determining an amplifier size of the present invention. Referring to FIG. 10, the step of determining an amplifier size (S135) according to an embodiment of the present invention is performed in such a way that its operation differs from each other depending on (a) under-amplification, (b) over-amplification, (c) optimization, and (d) rapid setting to an SNR level.

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

[0065] In addition, in the step of determining the amplification size (S135) of the present invention, in the case of over-amplification as shown in FIG. 10b, the SNR can be obtained by starting the scan from P1 and decreasing the amplification to Pn, in the opposite manner to FIG. 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 to obtain SNR while increasing the amplification degree starting from P1 to Pn when optimization is required, as shown in FIG. 10c, and set the maximum SNR point as the optimal amplification degree.

[0067] Furthermore, the step of determining the amplification size (S135) of the present invention may be configured to perform a staggered scan starting from Pn when it is necessary to quickly set a desired SNR level, as shown in FIG. 10d, and set the point at which a value within a previously set error range from the desired SNR is obtained as the optimal amplification level.

[0068] Although Figures 10a to 10d only describe a specific situation, 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 degree depending on various settings and conditions.

[0069] The above-mentioned optimum amplification degree can be determined by using an analog-digital converter in the step of performing signal conversion (S131). A signal passing through the analog-digital converter is output as a signal of 0 and 1. At this time, when a signal of a size equal to or larger than a preset size is acquired, the analog-digital converter has a feature of outputting a digital signal of a preset size. That is, in the present invention, using such a feature of the analog-digital converter, in the case of FIG. 10a and FIG. 10c, when the amplification degree is increased and the SNR of Pn is measured, if the same digital signal is output, the immediately preceding amplification degree may be set as the optimum amplification degree. In addition, in the case of FIG. 10b, in contrast to FIG. 10a and FIG. 10c, when the amplification degree is gradually decreased and the SNR of Pn is measured, if the same digital signal is output and a change begins, the immediately preceding amplification degree may be set as the optimum amplification degree.

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

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

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

[0073] In general, an analog-to-digital converter has a maximum value and a minimum value that can be output. When the size of the biological activity signal that is initially acquired becomes smaller or larger, the value of the digital signal output from the analog-to-digital converter also becomes smaller or larger. In this case, if the size of the biological activity signal deviates from the output range of the analog-to-digital converter, even if the biological activity signal changes, the digital signal that passes through the analog-to-digital converter and is output will only output a minimum value or a maximum value. This may result in a situation where it is impossible to obtain a high-resolution biological activity signal that is to be derived through the present invention.

[0074] Therefore, in one embodiment of the present invention, the step of determining the amplification size (S135) may be formed to acquire a digital signal value of the biological activity signal, and if the acquired digital signal value is continuously output as a minimum or maximum value during a buffer time which is a previously set judgment reference time, determine that the current amplification degree is over-amplified or under-amplified, and use the judgment result to determine the amplification degree as shown in FIG. 10a or FIG. 10c to change the amplification degree.

[0075] In another embodiment of the present invention, the situation in which a quick desired SNR setting is required as shown in Fig. 10d in the step of determining the amplification size (S135) may be, for example, an initial setting step of the method 10 of the present invention. Also, the situation in which an optimization of the desired SNR setting is required as shown in Fig. 10b in 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 reset range during the already-set optimization judgment time.

[0076] Meanwhile, the step of extracting signals (S15) according to an embodiment of the present invention may be configured to output digitally processed life activity signals in a signal extracting unit and extract amplified signals for each of the previously set life activity signal classifications. To this end, the step of extracting signals (S15) according to the present invention may include a step of determining whether or not a digitally processed life activity signal is output (S151) and a step of outputting a digitally processed life activity signal (S153), as shown in FIG.

[0077] The step of determining whether to output the digitally processed life activity signal (S151) may determine to output the digitally processed life activity signal if the signal-to-noise ratio is equal to or greater than a preset size, and may determine not to output the digitally processed life activity signal if the signal-to-noise ratio is less than a preset size. Here, when it is determined not to output the digitally processed life activity signal, the digitally processed life activity signal is passed to the step of determining the amplification size (S135) described above and can be used to determine the amplification size of the digitally processed life activity signal.

[0078] The step of outputting the digitally processed vital activity signal (S153) is configured to determine a pre-defined vital activity signal classification to which the digitally processed vital activity signal corresponds when it is determined to output the digitally processed vital activity signal, and output the digitally processed vital activity signal by classifying it for each signal classification. The digitally processed vital activity signal output module 135 is configured to classify the digitally processed vital activity signal into a pre-defined vital activity signal classification, where the pre-defined vital activity signal classification may be, for example, a vital signal, an activity signal, etc. The step of outputting the digitally processed vital activity signal (S153) may be configured to output the digitally processed vital activity signal through a port tagged with the classification once classification is performed and completed.

[0079] Meanwhile, FIG. 9 is a conceptual diagram of the present invention in FIG. 1 and FIG. 5. FIG. 9 shows a flow (concept) of amplifying and outputting a biological activity signal acquired through a radar using the system and method of the present invention. Referring to FIG. 9, the system and method of the present invention first acquires a biological activity signal including a biological signal and an activity signal using a radar. The acquired biological signal and activity signal are respectively indicated by I and Q in FIG. 9 for ease of distinction. The biological signal (first biological activity signal) and the activity signal (second biological activity signal) are each amplified through an amplifier. Here, the size of the amplification may be determined using a previously set amplification value or may be determined using the signal-to-noise ratio of the biological activity signal.

[0080] The amplified biological activity signal is passed through a filter to remove a certain frequency band. Here, the filter may be a low-pass filter. The biological activity signal, from which signals below a previously set frequency band have been removed by passing through the low-pass filter, is converted into a digital signal by passing through an analog-to-digital converter, and then is transformed by passing through a band-pass filter to leave only a specific frequency band. If the amplification degree of the digital biological activity signal from which only the specific frequency band remains is measured, the present invention performs an FFT transformation on the digital biological activity signal and obtains a signal-to-noise ratio using the FFT transformation result. If the signal-to-noise ratio and the amplification degree are obtained, the present invention may be formed to obtain an optimal amplification degree using the two pieces of information, and control the amplification degree by outputting the obtained amplification degree through a pulse width modulation (PWM) signal to control the voltage of the amplifier.

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

[0082] Although one embodiment of the present invention has been described above, the concept of the present invention is in no way limited to the embodiment disclosed in this specification, and a person skilled in the art who understands the concept of the present invention should be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same concept, which would also be considered to fall within the scope of the concept of the present invention.

Claims

1. 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 processor for digitally processing the pre-processed biological activity signal to generate a digital processed biological activity signal; a signal extracting unit for outputting the digitally processed biological activity signal and extracting amplified signals for each biological activity signal classification that has been set; A system for acquiring a high-resolution amplified biological activity signal comprising:

2. The biological activity signal processing unit includes: A biological activity signal acquisition module acquires the biological activity signal, the biological activity signal including a first biological activity signal being a biological signal and a second biological activity signal being an activity signal; a bioactivity signal preprocessing module for performing the preprocessing on the bioactivity signal to generate the preprocessed bioactivity signal; The system for acquiring a high-resolution amplified biological activity signal according to claim 1 , comprising:

3. The system for acquiring a high-resolution amplified biological activity signal as described in claim 2, wherein the pre-processing is a process of amplifying each of the first biological activity signal and the second biological activity signal to a pre-set size using an amplifier and applying a low-pass filter of a pre-set band.

4. The digital signal processing unit includes: a signal conversion module for digitizing the pre-processed biological activity signal; a signal ratio calculation module for determining the amplification degree of the digitalized biological activity signal, which is the digitized pre-processed biological activity signal, and converting the digitalized biological activity signal to calculate a signal-to-noise ratio; an amplification size determination module that applies the amplification degree and the signal-to-noise ratio to a predefined algorithm to determine the predefined size; The system for acquiring a high-resolution amplified biological activity signal according to claim 3 , comprising:

5. The signal extraction unit a digital processing vital activity signal output determination module for determining whether to output the digital vital activity signal when the signal-to-noise ratio is equal to or greater than a preset size, and determining not to output the digital vital activity signal when the signal-to-noise ratio is less than a preset size; a digital processing life activity signal output module that, when determining to output the digital processing life activity signal, determines the previously set life activity signal classification to which the digital processing life activity signal corresponds, and outputs the digital processing life activity signal by classifying it according to the signal classification; The system for acquiring a high-resolution amplified biological activity signal according to claim 4 , comprising:

6. acquiring a biological activity signal of the user using a radar device in a biological activity signal processing unit, and processing the biological activity signal by performing pre-processing to generate a pre-processed biological activity signal; digitally processing the pre-processed life activity signal in a digital signal processing unit to generate a digital processed life activity signal; A signal extraction unit outputs the digitally processed life activity signal to extract amplified signals for each of the life activity signal classifications that have been set; A method for obtaining a high-resolution amplified biological activity signal, comprising:

7. The step of processing the biological activity signal further comprises: obtaining the biological activity signal, the biological activity signal including a first biological activity signal being a biological signal and a second biological activity signal being an activity signal; performing a biosignal pre-processing step on the biosignal to generate a pre-processed bioactivity signal; The method for obtaining a high-resolution amplified biological activity signal according to claim 6, comprising:

8. The method for acquiring a high-resolution amplified biological activity signal as described in claim 7, wherein the preprocessing is a process of amplifying each of the first biological activity signal and the second biological activity signal to a pre-set size using an amplifier and applying a low-pass filter of a pre-set band.

9. The step of processing the digital signal comprises: digitizing the pre-processed bioactivity signal; determining the amplification level of the digitalized vital activity signal, which is the digitized pre-processed vital activity signal, and calculating a signal ratio by converting the digital vital activity signal to calculate a signal-to-noise ratio; determining an amplification size by applying the amplification degree and the signal-to-noise ratio to a predefined algorithm to determine the predefined size; 9. A method for obtaining a high-resolution amplified biological activity signal according to claim 8, comprising:

10. The step of extracting the signal comprises: A step of determining whether to output the digital processed life activity signal, in which the digital life activity signal is output when the signal-to-noise ratio is equal to or greater than a preset size, and the digital life activity signal is not output when the signal-to-noise ratio is less than a preset size; When it is determined to output the digitally processed vital activity signal, a step of determining the previously set vital activity signal classification to which the digitally processed vital activity signal corresponds, classifying the digitally processed vital activity signal according to the signal classification, and outputting the digitally processed vital activity signal; 10. The method of claim 9, further comprising:

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