High-resolution amplified biological activity signal acquisition system and method

Abstract

The invention provides a high-resolution amplified biological activity signal acquisition system and method. The system for acquiring a high-resolution amplified biological activity signal according to an embodiment of the present invention comprises: a biological activity signal processing unit for acquiring and preprocessing a biological activity signal of a user using a radar device to generate a preprocessed biological activity signal; a digital signal processing unit that digitally processes the pre-processed 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 a signal classified and amplified for each preset biological activity signal.

Description

Technical Field

[0001] The present invention relates to a high-resolution amplified biological activity signal acquisition system and method, and in particular to a high-resolution amplified biological activity signal acquisition system and method, which controls the amplification rate according to the acquired biological activity signal so that its resolution is higher than or equal to the standard for interpreting the information of the user's biological activity acquired through radar, and outputs the information after amplification. Background Art

[0002] In recent years, the number of people who need care or concern in domestic society has been increasing. People who need care or concern can be defined as those who need help in an emergency or do not have a cohabiting partner, such as the elderly, the disabled, and single-person households. The latest survey shows that the elderly population in South Korea has exceeded 9 million, the number of single-person households and the number of registered disabled people have exceeded 6.6 million and 2.6 million respectively. In addition, the number of people who died without a cohabiting partner and were later found to have died alone exceeded 10,000.

[0003] In addition, with the increase in the number of personal terminals and the increase in the demand for personal health management, various solutions or applications that collect personal health data and use it to provide personalized health management content are emerging. In order to collect such personal health data, wearable devices or mounted devices are required. When using wearable devices, it is usually not necessary to pre-process the measurement data because the health data is obtained from a part close to the body. However, when using mounted devices, the user's physical activity information is measured remotely, so the probability that the measurement data may be mixed with noise increases, and there is a problem that it is difficult to distinguish subtle differences.

[0004] Summary of the invention

[0005] Technical problem to be solved by the invention

[0006] In order to solve the problems of the prior art as described above, an embodiment of the present invention provides a high-resolution amplified biological activity signal acquisition system and method. Even when a radar is used to acquire low-frequency and low-resolution biological activity signals, the preset signal-to-noise ratio and amplification rate can be used to determine the amplification size and amplify the signal, thereby being able to variably determine the amplification size according to the biological activity signal that changes in real time.

[0007] Technical solutions to solve problems

[0008] In order to solve the above-mentioned problems, according to one aspect of the present invention, a high-resolution amplified biological activity signal acquisition system is provided. The high-resolution amplified biological activity signal acquisition system comprises: a biological activity signal processing unit, which uses a radar device to acquire a user's biological activity signal and preprocesses it to generate a preprocessed biological activity signal; a digital signal processing unit, which digitally processes the preprocessed biological activity signal to generate a digitally processed biological activity signal; and a signal extraction unit, which outputs the digitally processed biological activity signal and extracts signals amplified according to each preset biological activity signal classification.

[0009] The biological activity signal processing unit includes: a biological activity signal acquisition module, which acquires the biological activity signal including a first biological activity signal as a biological signal and a second biological activity signal as an activity signal; and a biological activity signal preprocessing module, which preprocesses the biological activity signal to generate the preprocessed biological activity signal.

[0010] In the preprocessing, an amplifier may be used to amplify the first biological activity signal and the second biological activity signal to preset sizes respectively, and a low-pass filter of a preset frequency band may be applied to process them.

[0011] The digital signal processing unit includes: a signal conversion module, which digitizes the pre-processed biological activity signal; a signal ratio calculation module, which confirms the amplification rate of the digital biological activity signal as the digitized pre-processed biological activity signal, and transforms the digital biological activity signal to calculate the signal-to-noise ratio; and an amplification size determination module, which applies the amplification rate and the signal-to-noise ratio to a preset algorithm to determine the preset size.

[0012] The signal extraction unit includes: a digital processing biological activity signal output judgment module, which determines to output the digital biological activity signal when the signal-to-noise ratio is greater than or equal to a preset size, and determines not to output the digital biological activity signal when the signal-to-noise ratio is less than a preset size; and a digital processing biological activity signal output module, which determines the preset biological activity signal classification corresponding to the digital processing biological activity signal when it is determined to output the digital processing biological activity signal, and outputs the digital processing biological activity signal according to the signal classification.

[0013] According to one aspect of the present invention, a high-resolution amplified biological activity signal acquisition method is provided. The high-resolution amplified biological activity signal acquisition method comprises: a biological activity signal processing step, in which a biological activity signal processing unit uses a radar device to acquire a user's biological activity signal and preprocesses it to generate a preprocessed biological activity signal; a digital signal processing step, in which a digital signal processing unit digitally processes the preprocessed biological activity signal to generate a digitally processed biological activity signal; and a signal extraction step, in which a signal extraction unit outputs the digitally processed biological activity signal and extracts a signal amplified according to each preset biological activity signal classification.

[0014] The biological activity signal processing step includes: a biological activity signal acquisition step, acquiring the biological activity signal including a first biological activity signal as a biological signal and a second biological activity signal as an activity signal; and a biological activity signal preprocessing step, performing the preprocessing on the biological activity signal to generate the preprocessed biological activity signal.

[0015] In the preprocessing, an amplifier may be used to amplify the first biological activity signal and the second biological activity signal to preset sizes respectively, and a low-pass filter of a preset frequency band may be applied to process them.

[0016] The digital signal processing step includes: a signal conversion step, digitizing the preprocessed biological activity signal; a signal ratio calculation step, confirming the amplification rate of the digital biological activity signal as the digitized preprocessed biological activity signal, and transforming the digital biological activity signal to calculate the signal-to-noise ratio; and an amplification size determination step, applying the amplification rate and the signal-to-noise ratio to a preset algorithm to determine the preset size.

[0017] The signal extraction step includes: a step of judging whether to output a digitally processed biological activity signal, when the signal-to-noise ratio is greater than or equal to a preset size, determining to output the digital biological activity signal, and when the signal-to-noise ratio is less than a preset size, determining not to output the digital biological activity signal; and a step of outputting a digitally processed biological activity signal, when it is determined to output the digitally processed biological activity signal, determining the preset biological activity signal classification corresponding to the digitally processed biological activity signal, and outputting the digitally processed biological activity signal according to the signal classification.

[0018] Effects of the Invention

[0019] The high-resolution amplified biological activity signal acquisition system and method according to one embodiment of the present invention has the following effects: even when using radar to acquire low-frequency and low-resolution biological activity signals, the preset signal-to-noise ratio and amplification rate can be used to determine the amplification size and amplify the signal, thereby being able to variably determine the amplification size according to the biological activity signal that changes in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 4 is a block diagram of a high-resolution amplified biological activity signal acquisition system according to an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Block diagram of the biological activity signal processing unit.

[0022] Figure 3 yes Figure 1 Block diagram of the digital signal processing section.

[0023] Figure 4 yes Figure 1 Block diagram of the signal extraction section.

[0024] Figure 5 is a flow chart of a method for obtaining a high-resolution amplified biological activity signal according to an embodiment of the present invention.

[0025] Figure 6 yes Figure 5 Flow chart of step S11.

[0026] Figure 7 yes Figure 5 Flow chart of step S13.

[0027] Figure 8 yes Figure 5 Flow chart of step S15.

[0028] Fig. 9 yes Figure 1 and Figure 5 A conceptual diagram of the present invention.

[0029] Fig.10 It is a schematic diagram of a method for setting the enlargement size in the enlargement size determination module or the enlargement size determination step of the present invention. DETAILED DESCRIPTION

[0030] Below, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. When assigning reference numerals to components in each of the accompanying drawings, even if the same components are shown in different drawings, the same reference numerals are assigned as much as possible. In addition, when describing the present embodiment, if it is determined that the detailed description of the relevant known configuration or function may obscure the gist of the present technical idea, the detailed description may be omitted. When "including", "having", "consisting of...", etc. are used in the specification, other parts may be added unless "only" is used. When a component is expressed in the singular, it also includes the plural, unless otherwise specifically stated.

[0031] In addition, when describing the components of the present disclosure, terms such as first, second, A, B, (a), (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order or number of the component is not limited by the terms.

[0032] It should be understood that in the description of the positional relationship of components, when two or more components are described as being "connected", "combined" or "coupled", the two or more components may be directly "connected", "combined" or "coupled", or the two or more components may be "connected", "combined" or "coupled" through other components. The other components are included in one or more components of the two or more components that are "connected", "combined" or "coupled" to each other.

[0033] In the description of the time flow relationship related to components, operating methods, manufacturing methods, etc., when describing the time relationship or sequential relationship, for example, "after", "next", "after", "before", etc., non-sequential situations are also included unless "immediately" or "directly" is used.

[0034] On the other hand, when referring to a numerical value or corresponding information (e.g., grade, etc.) of a component, even if not explicitly stated separately, the numerical value or corresponding information should be interpreted as including the error range that may occur due to various factors (e.g., process factors, internal or external impacts, noise).

[0035] Figure 1 is a block diagram of a high-resolution amplified biological activity signal acquisition system according to an embodiment of the present invention, Figure 2 yes Figure 1 Block diagram of the biological activity signal processing unit, Figure 3 yes Figure 1 Block diagram of the digital signal processing section, Figure 4 yes Figure 1 The following is a block diagram of the signal extraction unit. Figures 1 to 4 A high-resolution amplified biological activity signal acquisition system according to an embodiment of the present invention is described in detail.

[0036] According to an embodiment of the present invention, the high-resolution amplified biological activity signal acquisition system 1 can use a radar device to acquire a user's biological activity signal, classify the acquired biological activity signal according to a preset classification, and amplify the signal according to each classification for output. Figure 1 As shown, a high-resolution amplified biological activity signal acquisition system 1 according to an embodiment of the present invention includes a biological activity signal processing unit 11 , a digital signal processing unit 13 and a signal extraction unit 15 .

[0037] According to an embodiment of the present invention, the biological activity signal processing unit 11 uses a radar device to obtain the biological activity signal of the user and pre-processes it to generate a pre-processed biological signal. Figure 2 As shown, the biological activity signal processing unit 11 includes a biological activity signal acquisition module 111 and a biological activity signal preprocessing module 113 .

[0038] The biological activity signal acquisition module 111 acquires information measured by the radar, that is, the biological activity signal of the user. The biological activity signal includes the biological signal and the activity signal of the user. Among them, the biological signal can be a signal measuring breathing, heartbeat, etc., and the activity signal can be a signal measuring the movement of the user. If the biological activity signal acquisition module 111 acquires the biological activity signal, the biological signal contained in the biological activity signal is acquired as the first biological activity signal, and the activity signal contained in the biological activity signal is acquired as the second biological activity signal.

[0039] The biological activity signal preprocessing module 113 preprocesses the biological activity signal to generate a preprocessed biological activity signal. The preprocessing can be performed on the first biological activity signal and the second biological activity signal respectively. The preprocessing performed in the biological activity signal preprocessing module 113 can use an amplifier to amplify the first biological activity signal and the second biological activity signal respectively with a preset size, and apply a low-pass filter of a preset frequency band for processing. The preset size can be the amplification size determined in the digital signal processing unit 13 described later, but as an exception, the amplification size initially determined can be used for the first biological activity signal and the second biological activity signal initially acquired.

[0040] According to another embodiment of the present invention, the biological activity signal preprocessing module 113 can also use a variable amplifier to amplify the first biological activity signal and the second biological activity signal. The variable amplifier of the present invention includes a bandpass function, obtains the first biological activity signal and the second biological activity signal, and only allows the frequency of the preset frequency band to pass, and can also play a role in amplifying the frequency of the corresponding frequency band to a preset size. Alternatively, in the case of the above-mentioned low-pass filter of the preset frequency band, in this embodiment, if the biological activity signal passing through the variable amplifier contains other frequency bands except the frequency band desired to be used in the present invention, the corresponding frequency band can be excluded.

[0041] However, the present invention is not necessarily limited thereto, and if it is preset in the biological activity signal preprocessing module 113 , the initial amplification may be performed using the amplification size determined in the digital signal processing unit 13 .

[0042] The digital signal processing unit 13 performs digital processing on the pre-processed biological activity signal to generate a digitally processed biological signal. Figure 3As shown, the digital signal processing unit 13 includes a signal conversion module 131 , a signal ratio calculation module 133 and an enlargement size determination module 135 .

[0043] The signal conversion module 131 is used to digitize the pre-processed biological activity signal. As an example, the signal conversion module 131 can be an analog-to-digital converter (ADC). Alternatively, the signal conversion module 131 also includes a bandpass filter for digitizing the pre-processed biological activity signal converted by the analog-to-digital converter, that is, the digital biological activity signal, only in a specific frequency band. The specific frequency band of the bandpass filter used in the signal conversion module 131 can be determined as a different frequency band according to the first biological activity signal and the second biological activity signal.

[0044] The pre-processed biological activity signal digitized by the signal conversion module 131, i.e., the digital biological activity signal, is used to confirm the amplification and calculate the signal-to-noise ratio in the signal ratio calculation module 133. The signal ratio calculation module 133 can confirm the amplification of the digital biological activity signal and transform the digital biological activity signal to calculate the signal-to-noise ratio.

[0045] To this end, the signal ratio calculation module 133 can first obtain the digital biological activity signal from the signal transformation module 131, confirm the amplification factor of the digital biological activity signal and obtain the amplification factor information, and then transform the digital biological activity signal to calculate the signal-to-noise ratio. As an example, the transformation used can be a fast Fourier transform (FFT). The digital biological activity signal using the fast Fourier transform (FFT) is transformed into a pure biological activity signal, and the signal ratio calculation module 113 can compare the digital biological activity signal and the pure biological activity signal to calculate the signal-to-noise ratio.

[0046] The signal-to-noise ratio can be used by the signal extraction unit 15 described later to determine whether to output a corresponding digital biological activity signal based on the ratio. The details will be described later.

[0047] On the other hand, after obtaining the signal-to-noise ratio, the amplification size determination module 135 may apply the amplification rate and the signal-to-noise ratio to a preset algorithm to determine the amplification size. The amplification size may be the amplification size set in the biological activity signal preprocessing module 113 as described above. The amplification size determination module 135 may output the amplification size as a PWM signal, and output a voltage that can control the amplification rate through an integrator filter to provide a voltage to the amplifier of the biological activity signal preprocessing module 113 to control the amplification size.

[0048] Fig.10 Schematic diagram of a method for setting the magnification size in the magnification size determination module or magnification size determination step of the present invention. Fig.10According to an embodiment of the present invention, the amplification size determination module 135 performs different operations according to (a) the amplification is too small, (b) the amplification is too large, (c) the optimization is required, and (d) the SNR level needs to be quickly set.

[0049] First, in Fig.10 In the case where the magnification is too small as shown in a, the magnification size determination module 135 of the present invention can start scanning from P1, and increase the magnification rate to Pn to obtain SNR (signal-to-noise ratio), and determine the maximum SNR point as the optimal magnification rate, thereby determining the magnification size.

[0050] Or, in Fig.10 b shows an over-enlarged case. Fig.10 aOn the contrary, the magnification size determination module 135 of the present invention may start scanning from P1 and reduce the magnification to Pn to obtain SNR, and determine the maximum SNR point as the optimal magnification.

[0051] And, in such Fig.10 In the case of optimization required as shown in c, the magnification size determination module 135 of the present invention can start scanning from P1, increase the magnification to Pn to obtain SNR, and determine the maximum SNR point as the optimal magnification.

[0052] And, in such Fig.10 In the case where the SNR level needs to be quickly set as shown in d, the magnification size determination module 135 of the present invention can start scanning from Pn and perform a "Z"-shaped scan to set the point with a value within a preset error range with the expected SNR as the optimal magnification.

[0053] Fig.10 a to Fig.10 d only shows a specific case, but the present invention is not limited thereto, and a specific SNR point may be set as an optimal amplification ratio to determine the amplification size according to various settings and conditions.

[0054] The above-mentioned optimal amplification ratio can be determined by using the analog-to-digital converter of the signal conversion module 131. The signal output by the analog-to-digital converter is a signal of 0 and 1. At this time, if a signal greater than or equal to a preset size is obtained, the analog-to-digital converter outputs a digital signal of a preset size. That is, in the present invention, using the characteristics of this analog-to-digital converter, Fig.10 a and Fig.10 In the case shown in c, when measuring the SNR of Pn by increasing the amplification factor, if the same digital signal is output, the previous amplification factor can be set to the optimal amplification factor. Fig.10 In the case shown in b, Fig.10 a and Fig.10cOn the contrary, when measuring the SNR of Pn by gradually reducing the amplification factor, if the same digital signal is output and then starts to change, the previous amplification factor can be set as the optimal amplification factor.

[0055] The magnification size determination module 135 according to an embodiment of the present invention may use the determination time for changing the magnification ratio to determine whether to change the magnification ratio. If it is determined that the magnification ratio needs to be changed, the magnification ratio is changed.

[0056] The amplification size determination module 135 uses the judgment time preset by the administrator to determine whether to change the amplification rate of the acquired first biological activity signal and the second biological activity signal. If the SNR of the biological activity signal is stably acquired, the amplification size determination module 135 does not need to change the amplification rate. In the case where the acquired SNR is not the expected SNR, the amplification size determination module 135 needs to change the amplification rate. As a more specific example, if the size of the biological activity changes due to the movement of the user, the sizes of the acquired first biological activity signal and the second biological activity signal change. Therefore, when the first biological activity signal and the second biological activity signal are amplified using the same amplification rate, an SNR different from the expected SNR may be acquired.

[0057] Therefore, through the above Fig.10 a to Fig.10 d Before determining the enlargement size, the enlargement size determination module 135 may determine whether to change the enlargement ratio through a buffer (determination reference time) for determining whether to change the enlargement ratio.

[0058] Generally speaking, an analog-to-digital converter has a maximum value and a minimum value that can be output. When the size of the initially acquired biological activity signal becomes smaller or larger, the value of the digital signal output from the analog-to-digital converter also becomes smaller or larger. At this time, if the size of the biological activity signal exceeds the output range of the analog-to-digital converter, even if the biological activity signal changes, the digital signal output by the analog-to-digital converter only outputs the minimum value or the maximum value, which may be a situation where a high-resolution biological activity signal cannot be obtained by the present invention.

[0059] Therefore, in one embodiment of the present invention, the magnification size determination module 135 obtains the digital signal value of the biological activity signal. If the obtained digital signal value is output at the minimum value or the maximum value during the buffer time as the preset judgment reference time, it can be determined that the current magnification rate is too large or too small, and the judgment result is used to perform the following operations: Fig.10 a or Fig.10 c shows the magnification determined and the magnification changed.

[0060] In yet another embodiment of the present invention, the enlargement size determination module 135 is as follows: Fig.10The situation shown in d where a quick setting to a desired SNR is required may be an initial setting step of the system 1 of the present invention. Alternatively, the enlargement size determination module 135 may be configured as follows: Fig.10 The situation requiring optimization shown in b may be a situation where the acquired biological activity signal has a digital signal value that does not exceed a preset amplification reset range within a preset optimization judgment time.

[0061] On the other hand, the signal extraction unit 15 according to an embodiment of the present invention outputs the digitally processed biological activity signal and extracts the amplified signals respectively classified according to each preset biological activity signal. Figure 4 As shown, the signal extraction unit 15 of the present invention includes a digital processing biological activity signal output determination module 151 and a digital processing biological activity signal output module 153 .

[0062] The digital processing biological activity signal output determination module 151 is configured to: when the signal-to-noise ratio is greater than or equal to a preset value, determine to output the digital processing biological activity signal, and when the signal-to-noise ratio is less than a preset value, determine not to output the digital processing biological activity signal. When it is determined not to output the digital processing biological activity signal, the corresponding digital processing biological activity signal can be sent to the above-mentioned amplification size determination module 135 for determining the amplification size of the digital processing biological activity signal.

[0063] The digital processing biological activity signal output module 153 is configured to: when determining to output the digital processing biological activity signal, determine the preset biological activity signal classification corresponding to the digital processing biological activity signal, and output the digital processing biological activity signal according to the signal classification. The digital processing biological activity signal output module 135 classifies the digital processing biological activity signal according to the preset biological activity signal classification, where, as an example, the preset biological activity signal classification can be a biological signal, an activity signal, etc. When the classification is completed, the digital processing biological activity signal output module 153 can output the digital processing biological activity signal through the port marked with the corresponding classification.

[0064] on the other hand, Figures 5 to 8 A high-resolution amplified biological activity signal acquisition method according to an embodiment of the present invention is shown. Figure 5 is a flow chart of a method for obtaining a high-resolution amplified biological activity signal according to an embodiment of the present invention. Figure 6 yes Figure 5 The flowchart of step S11, Figure 7 yes Figure 5 The flowchart of step S13, Figure 8 yes Figure 5 Flow chart of step S15. Figures 5 to 8A high-resolution amplified biological activity signal acquisition method according to an embodiment of the present invention is described in detail. For the sake of convenience, Figure 1 However, the present invention is not necessarily limited thereto, and may be applied to a box or system capable of performing similar operations.

[0065] According to an embodiment of the present invention, a high-resolution amplified biological activity signal acquisition method 10 can use a radar device to acquire a user's biological activity signal, classify the acquired biological activity signal according to a preset classification, and amplify the signal according to each classification for output. To this end, Figure 5 As shown, a high-resolution amplified biological activity signal acquisition method 10 according to an embodiment of the present invention includes: a biological activity signal processing step S11, a digital signal processing step S13 and a signal extraction step S15.

[0066] In the biological activity signal processing step S11 according to an embodiment of the present invention, the biological activity signal processing unit uses a radar device to obtain the biological activity signal of the user and pre-processes it to generate a pre-processed biological signal. Figure 6 As shown, the biological activity signal processing step S11 includes a biological activity signal acquiring step S111 and a biological activity signal preprocessing step S113.

[0067] The biological activity signal acquisition step S111 acquires information measured by the radar, namely, the biological activity signal of the user. The biological activity signal includes the biological signal and the activity signal of the user. Among them, the biological signal can be a signal for measuring breathing, heartbeat, etc., and the activity signal can be a signal for measuring the movement of the user. In the biological activity signal acquisition step S111, if the biological activity signal is acquired, the biological signal contained in the biological activity signal is acquired as the first biological activity signal, and the activity signal contained in the biological activity signal is acquired as the second biological activity signal.

[0068] In the biological activity signal preprocessing step S113, the biological activity signal is preprocessed to generate a preprocessed biological activity signal. The preprocessing can be performed on the first biological activity signal and the second biological activity signal respectively. The preprocessing performed in the biological activity signal preprocessing step S113 can use an amplifier to amplify the first biological activity signal and the second biological activity signal respectively with a preset size, and apply a low-pass filter of a preset frequency band for processing. The preset size can be the amplification size determined in the digital signal processing step S13 described later, but as an exception, the initially determined amplification size can be used for the first biological activity signal and the second biological activity signal initially acquired.

[0069] In the biological activity signal preprocessing step S113 according to another embodiment of the present invention, a variable amplifier can also be used to amplify the first biological activity signal and the second biological activity signal. The variable amplifier of the present invention includes a bandpass function, obtains the first biological activity signal and the second biological activity signal, and only allows the frequencies of the preset frequency band to pass, and can also play a role in amplifying the frequencies of the corresponding frequency bands to a preset size. Alternatively, in the case of the above-mentioned low-pass filter of the preset frequency band, in this embodiment, if the biological activity signal passing through the variable amplifier contains other frequency bands except the frequency bands to be used in the present invention, the corresponding frequency bands can be excluded.

[0070] However, the present invention is not necessarily limited thereto, and if preset in the biological activity signal preprocessing step S113, the initial amplification may be performed using the amplification size determined in the digital signal processing step S13.

[0071] The digital signal processing step S13 performs digital processing on the pre-processed biological activity signal to generate a digitally processed biological signal. Figure 7 As shown, the digital signal processing step S1 includes a signal conversion step S131, a signal ratio calculation step S133 and an enlargement size determination step S135.

[0072] The signal conversion step S131 is used to digitize the preprocessed biological activity signal. As an example, the signal conversion step S131 can be an analog-to-digital converter (ADC). Alternatively, the signal conversion module 131 also includes a bandpass filter for digitizing the preprocessed biological activity signal converted by the analog-to-digital converter, that is, the digital biological activity signal, only in a specific frequency band. The specific frequency band of the bandpass filter used in the signal conversion module 131 can be determined as a different frequency band according to the first biological activity signal and the second biological activity signal.

[0073] The pre-processed biological activity signal digitized by the signal conversion step S131, i.e., the digital biological activity signal, is used to confirm the amplification and calculate the signal-to-noise ratio in the signal ratio calculation step S133. The signal ratio calculation step S133 can confirm the amplification of the digital biological activity signal and transform the digital biological activity signal to calculate the signal-to-noise ratio.

[0074] To this end, the signal ratio calculation step S133 can first obtain the digital biological activity signal from the signal transformation step S131, confirm the amplification factor of the digital biological activity signal and obtain the amplification factor information, and then transform the digital biological activity signal to calculate the signal-to-noise ratio. As an example, the transformation used can be a fast Fourier transform (FFT). The digital biological activity signal using the fast Fourier transform (FFT) is transformed into a pure biological activity signal, and the signal ratio calculation step S133 can compare the digital biological activity signal and the pure biological activity signal to calculate the signal-to-noise ratio.

[0075] The signal-to-noise ratio can be used in the signal output step S15 described later to determine whether to output a corresponding digital biological activity signal based on the ratio. The details will be described later.

[0076] On the other hand, after obtaining the signal-to-noise ratio, the amplification rate and the signal-to-noise ratio may be applied to a preset algorithm to determine the amplification rate in the amplification rate determination step S135. The amplification rate may be the amplification rate set in the biological activity signal preprocessing step S113 as described above. The amplification rate determination step S135 may output the amplification rate as a PWM signal, and output a voltage that can control the amplification rate through an integrator filter to provide a voltage to the amplifier of the biological activity signal preprocessing step S113 to control the amplification rate.

[0077] Fig.10 Schematic diagram of a method for setting the magnification size in the magnification size determination module or magnification size determination step of the present invention. Fig.10 According to an embodiment of the present invention, the magnification size determination step S135 performs different operations according to (a) the magnification is too small, (b) the magnification is too large, (c) the optimization is required, and (d) the SNR level needs to be quickly set.

[0078] First, in Fig.10 In the case where the magnification is too small as shown in a, the magnification size determination step S135 of the present invention can start scanning from P1, and increase the magnification rate to Pn to obtain SNR (signal-to-noise ratio), and determine the maximum SNR point as the optimal magnification rate, thereby determining the magnification size.

[0079] Or, in Fig.10 b shows an over-enlarged case. Fig.10 aOn the contrary, the magnification size determination step S135 of the present invention can start scanning from P1 and reduce the magnification to Pn to obtain SNR, and determine the maximum SNR point as the optimal magnification.

[0080] And, in such Fig.10In the case where optimization is required as shown in c, the magnification size determination step S135 of the present invention can start scanning from P1, and increase the magnification to Pn to obtain SNR, and determine the maximum SNR point as the optimal magnification.

[0081] And, in such Fig.10 In the case where the SNR level needs to be quickly set as shown in d, the magnification size determination step S135 of the present invention can start scanning from Pn and perform a "Z"-shaped scan to set the point with a value within a preset error range with the expected SNR as the optimal magnification.

[0082] Fig.10 a to Fig.10 d only shows a specific case, but the present invention is not limited thereto, and a specific SNR point may be set as an optimal amplification ratio to determine the amplification size according to various settings and conditions.

[0083] The above-mentioned optimal amplification ratio can be determined by using the analog-to-digital converter of the signal conversion step S131. The signal output by the analog-to-digital converter is a signal of 0 and 1. At this time, if a signal greater than or equal to a preset size is obtained, the analog-to-digital converter outputs a digital signal of a preset size. That is, in the present invention, using the characteristics of this analog-to-digital converter, Fig.10 a and Fig.10 In the case shown in c, when measuring the SNR of Pn by increasing the amplification factor, if the same digital signal is output, the previous amplification factor can be set to the optimal amplification factor. Fig.10 In the case shown in b, Fig.10 a and Fig.10 cOn the contrary, when measuring the SNR of Pn by gradually reducing the amplification factor, if the same digital signal is output and then starts to change, the previous amplification factor can be set as the optimal amplification factor.

[0084] Among them, according to an embodiment of the present invention, the magnification size determination step S135 can use the determination time for changing the magnification ratio to determine whether to change the magnification ratio. If it is determined that the magnification ratio needs to be changed, the magnification ratio is changed.

[0085] The amplification size determination step S135 uses the judgment time preset by the administrator to determine whether to change the amplification rate of the acquired first bioactivity signal and the second bioactivity signal. If the SNR of the bioactivity signal is stably acquired, the amplification rate does not need to be changed in the amplification size determination step S135. If the acquired SNR is not the expected SNR, the amplification rate needs to be changed in the amplification size determination step S135. As a more specific example, if the size of the bioactivity changes due to the movement of the user, the sizes of the acquired first bioactivity signal and the second bioactivity signal change. Therefore, when the first bioactivity signal and the second bioactivity signal are amplified using the same amplification rate, an SNR different from the expected SNR may be acquired.

[0086] Therefore, through the above Fig.10 a to Fig.10 d Before determining the enlargement size, the enlargement size determination module 135 may determine whether to change the enlargement ratio through a buffer (determination reference time) for determining whether to change the enlargement ratio.

[0087] Generally speaking, an analog-to-digital converter has a maximum value and a minimum value that can be output. When the size of the initially acquired biological activity signal becomes smaller or larger, the value of the digital signal output from the analog-to-digital converter also becomes smaller or larger. At this time, if the size of the biological activity signal exceeds the output range of the analog-to-digital converter, even if the biological activity signal changes, the digital signal output by the analog-to-digital converter only outputs the minimum value or the maximum value, which may be a situation where a high-resolution biological activity signal cannot be obtained by the present invention.

[0088] Therefore, in one embodiment of the present invention, the digital signal value of the biological activity signal is obtained in the magnification size determination step S135. If the obtained digital signal value is outputted at the minimum value or the maximum value during the buffer time as the preset judgment reference time, it can be determined that the current magnification rate is too large or too small, and the determination result is used to perform the following steps: Fig.10 a or Fig.10 c shows the magnification determined and the magnification changed.

[0089] In another embodiment of the present invention, the enlargement size determination step S135 is as follows: Fig.10 The situation shown in d that needs to be quickly set to the desired SNR can be the initial setting step of the method 10 of the present invention. Alternatively, the enlargement size determination step S135 is as follows Fig.10 The situation requiring optimization shown in b may be a situation where the acquired biological activity signal has a digital signal value that does not exceed a preset amplification reset range within a preset optimization judgment time.

[0090] On the other hand, in the signal extraction step S15 according to an embodiment of the present invention, the digitally processed biological activity signal can be output to extract the signal amplified according to each preset biological activity signal classification. Figure 8 As shown, the signal extraction step S15 according to an embodiment of the present invention includes a digital processing biological activity signal output determination step S151 and a digital processing biological activity signal output step S153.

[0091] The digitally processed biological activity signal output or not judging step S151 may be configured as follows: when the signal-to-noise ratio is greater than or equal to a preset value, it is determined that the digitally processed biological activity signal is output; when the signal-to-noise ratio is less than a preset value, it is determined that the digitally processed biological activity signal is not output. When it is determined that the digitally processed biological activity signal is not output, the corresponding digitally processed biological activity signal may be sent to the above-mentioned amplification size determining step S135 for determining the amplification size of the digitally processed biological activity signal.

[0092] The digitally processed biological activity signal output step S153 is configured to: when it is determined to output the digitally processed biological activity signal, determine the preset biological activity signal classification corresponding to the digitally processed biological activity signal, and output the digitally processed biological activity signal according to the signal classification. In the digitally processed biological activity signal output step S153, the digitally processed biological activity signal is classified according to the preset biological activity signal classification, where, as an example, the preset biological activity signal classification can be a biological signal, an activity signal, etc. In the digitally processed biological activity signal output step S153, when the classification is completed, the digitally processed biological activity signal can be output through the port marked with the corresponding classification.

[0093] on the other hand, Fig. 9 yes Figure 1 and Figure 5 A conceptual diagram of the present invention. Fig. 9 The following is a flow chart showing the process (concept) of amplifying and outputting biological activity signals acquired by radar using the system and method of the present invention. Fig. 9 ,,The system and method of the present invention first uses radar to obtain biological activity signals including biological signals and activity signals. In order to facilitate the distinction, Fig. 9 The acquired biological signal and activity signal are represented as I and Q respectively. The biological signal (first biological activity signal) and the activity signal (second biological activity signal) are amplified by amplifiers respectively. The amplification size can be determined by a preset amplification value or by a signal-to-noise ratio of the corresponding biological activity signal.

[0094] The amplified biological activity signal can delete a predetermined frequency band through a filter. Among them, the filter can be a low-pass filter. The biological activity signal that deletes the signal below the preset frequency band through the low-pass filter is converted into a digital signal through an analog-to-digital converter, and then only a specific frequency band is left through a bandpass filter. The amplification rate of the digital biological activity signal that only leaves a specific frequency band is measured. The present invention performs FFT transformation on the digital biological activity signal, and uses the FFT transformation result to obtain the signal-to-noise ratio. After obtaining the signal-to-noise ratio and the amplification rate, the present invention uses the two types of information to obtain the optimal amplification rate, and controls the voltage of the amplifier through the PWM signal output obtained amplification rate, thereby controlling the amplification rate.

[0095] On the other hand, when the signal-to-noise ratio is greater than or less than a preset value, the present invention does not change the amplification rate and outputs the corresponding digital biological activity signal, and when outputting, the corresponding digital biological activity signal can be output through different ports according to signal classification.

[0096] Although one embodiment of the present invention is described above, the concept of the present invention is not limited to the embodiment given in this specification. Those skilled in the art who understand the concept of the present invention can easily derive other embodiments by adding, changing, deleting, and adding components within the scope of the same concept, but this will also be considered to be within the scope of the concept of the present invention.

Claims

1. A high-resolution amplification biological activity signal acquisition system, It is characterized in that include: a bioactivity signal processing unit that uses a radar device to acquire a user's bioactivity signal and pre-processes it to generate a pre-processed bioactivity signal; a digital signal processing unit, digitally processing the pre-processed biological activity signal to generate a digitally processed biological activity signal; and The signal extraction unit outputs the digitally processed biological activity signal and extracts the amplified signals respectively classified according to each preset biological activity signal.

2. The high-resolution amplified biological activity signal acquisition system according to claim 1, It is characterized in that The biological activity signal processing unit comprises: a biological activity signal acquisition module, which acquires the biological activity signal including a first biological activity signal as a biological signal and a second biological activity signal as an activity signal; and The biological activity signal preprocessing module performs the preprocessing on the biological activity signal to generate the preprocessed biological activity signal.

3. The high-resolution amplified biological activity signal acquisition system according to claim 2, It is characterized in that In the preprocessing, an amplifier is used to amplify the first biological activity signal and the second biological activity signal to preset sizes respectively, and a low-pass filter of a preset frequency band is applied to process them.

4. The high-resolution amplified biological activity signal acquisition system according to claim 3, It is characterized in that The digital signal processing unit comprises: A signal conversion module, digitizing the pre-processed biological activity signal; a signal ratio calculation module, which determines the amplification rate of the digital biological activity signal as the digitized preprocessed biological activity signal, and transforms the digital biological activity signal to calculate a signal-to-noise ratio; and The magnification size determination module applies the magnification rate and the signal-to-noise ratio to a preset algorithm to determine the preset size.

5. The high-resolution amplified biological activity signal acquisition system according to claim 4, It is characterized in that The signal extraction unit comprises: a digital processing biological activity signal output determination module, which determines to output the digital biological activity signal when the signal-to-noise ratio is greater than or equal to a preset value, and determines not to output the digital biological activity signal when the signal-to-noise ratio is less than a preset value; and The digitally processed biological activity signal output module, when determining to output the digitally processed biological activity signal, determines the preset biological activity signal classification corresponding to the digitally processed biological activity signal, and outputs the digitally processed biological activity signal according to the signal classification distinction.

6. A method for obtaining high-resolution amplified biological activity signals, It is characterized in that include: a biological activity signal processing step, in which the biological activity signal processing unit uses the radar device to obtain the biological activity signal of the user and pre-processes it to generate a pre-processed biological activity signal; a digital signal processing step, wherein the digital signal processing unit digitally processes the pre-processed biological activity signal to generate a digitally processed biological activity signal; and In the signal extraction step, the signal extraction unit outputs the digitally processed biological activity signal and extracts the amplified signals respectively classified according to each preset biological activity signal.

7. The high-resolution amplified biological activity signal acquisition method according to claim 6, It is characterized in that The biological activity signal processing step comprises: a biological activity signal acquisition step of acquiring the biological activity signal including a first biological activity signal as a biological signal and a second biological activity signal as an activity signal; and The biological signal preprocessing step preprocesses the biological signal to generate the preprocessed biological activity signal.

8. The high-resolution amplified biological activity signal acquisition method according to claim 7, It is characterized in that In the preprocessing, an amplifier is used to amplify the first biological activity signal and the second biological activity signal to preset sizes respectively, and a low-pass filter of a preset frequency band is applied to process them.

9. The high-resolution amplified biological activity signal acquisition method according to claim 8, It is characterized in that The digital signal processing step comprises: a signal conversion step, digitizing the preprocessed biological activity signal; a signal ratio calculation step of determining the amplification rate of the digital biological activity signal as the digitized preprocessed biological activity signal and transforming the digital biological activity signal to calculate a signal-to-noise ratio; and The magnification size determination step applies the magnification ratio and the signal-to-noise ratio to a preset algorithm to determine the preset size.

10. The high-resolution amplified biological activity signal acquisition method according to claim 9, It is characterized in that The signal extraction step comprises: a step of determining whether to output the digitally processed biological activity signal, when the signal-to-noise ratio is greater than or equal to a preset value, determining to output the digital biological activity signal, and when the signal-to-noise ratio is less than a preset value, determining not to output the digital biological activity signal; and The digitally processed biological activity signal output step, when determining to output the digitally processed biological activity signal, determines the preset biological activity signal classification corresponding to the digitally processed biological activity signal, and outputs the digitally processed biological activity signal according to the signal classification distinction.

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