System and method for acquiring bio / motion signal information using doppler signal, and system and method for determining sleep state using same

Abstract

Provided are a system and a method for acquiring bio / motion signal information using a Doppler signal, and a system and a method for determining a sleep state using same. The system for acquiring bio / motion signal information using a Doppler signal according to one embodiment of the present invention comprises: a Doppler signal acquisition unit which emits a radar signal to a subject to be observed, acquires a Doppler signal by acquiring a signal returning after the radar signal is reflected, and acquires a first phase Doppler signal and a second phase Doppler signal by processing the Doppler signal; a Doppler signal processing unit for obtaining first signal information and second signal information by processing the first phase Doppler signal and the second phase Doppler signal, respectively; and a signal information output unit for acquiring the first signal information and the second signal information, and analyzing each of the first signal information and the second signal information by using a preset algorithm so as to acquire bio-signal information and motion signal information.

Description

System and method for obtaining bio / movement signal information using Doppler signals and system and method for determining sleep status using the same

[0001] The present invention relates to a system and method for obtaining bio / motion signal information using a Doppler signal and a system and method for determining a sleep state using the same, and more particularly, to a system and method for obtaining bio / motion signal information using a Doppler signal, which analyzes a Doppler signal obtained by emitting a radar signal to a subject of observation, distinguishes and obtains a bio signal and a motion signal using the analysis result, and uses the same to determine the sleep state of the subject of observation.

[0002] Recently, the number of people in need of care or attention has been increasing in Korean society. This population can be defined as those who require assistance in emergencies or who have no living companions. Examples include the elderly, people with disabilities, and single-person households. Recent surveys show that the elderly population has surpassed 9 million, while the number of single-person households and registered disabled persons has also surpassed 6.6 million and 2.6 million, respectively. Furthermore, the number of people who die alone, often due to the absence of a living companion, has surpassed 10,000.

[0003] Furthermore, the rise of personal devices and the growing demand for personal healthcare have led to the emergence of various solutions and applications that collect personal healthcare data and use it to provide personalized healthcare content. Collecting this personalized healthcare data involves the use of wearable or installed devices. Wearable devices often eliminate the need for preprocessing because they capture healthcare data close to the body. However, installed devices measure the user's physical activity from a distance, which increases the likelihood of noise in the measured data and makes it difficult to distinguish subtle differences.

[0004] Furthermore, these single-person households, with their irregular lifestyles, can experience irregular sleep quality, potentially harming their health. Measuring sleep quality requires making an appointment at a specialized clinic, visiting at a specific time, and then undergoing the cumbersome process of sleeping while using specialized equipment. This makes it difficult to regularly measure sleep quality.

[0005] In order to solve the problems of the prior art as described above, one embodiment of the present invention provides a system and method for obtaining bio-signal or movement signal information using a Doppler signal, which can obtain bio-signal or movement signal information of the subject of observation from the Doppler signal by emitting a radar signal to the subject of observation and analyzing a Doppler signal generated through a reflected wave obtained by reflecting the emitted radar signal, and a system and method for determining a sleep state using the same.

[0006] In addition, one embodiment of the present invention provides a system and method for obtaining bio-activity information of a user in a sleeping state using radar, and a Doppler signal to analyze the obtained bio-activity information to define the user's sleeping state, and a system and method for determining the sleeping state using the same.

[0007] According to one aspect of the present invention for solving the above-described problem, a system for acquiring bio / motion signal information using a Doppler signal is provided. The system for acquiring bio / motion signal information using a Doppler signal includes: a Doppler signal acquisition unit that emits a radar signal to a subject of observation, acquires a signal reflected by the radar signal to acquire a Doppler signal, and processes the Doppler signal to acquire a first phase Doppler signal and a second phase Doppler signal; a Doppler signal processing unit that processes the first phase Doppler signal and the second phase Doppler signal, respectively, to acquire first signal information and second signal information; and a signal information output unit that acquires the first signal information and the second signal information, and analyzes the first signal information and the second signal information, respectively, using a preset algorithm to acquire bio / motion signal information and movement signal information.

[0008] The first signal information and the second signal information obtained through the first phase Doppler signal may include 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal may include 2-1 signal information and 2-2 signal information.

[0009] The Doppler signal processing unit may include a first Doppler signal processing module that performs first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a 1-1 phase Doppler processed signal and a 2-1 phase Doppler processed signal; a second Doppler signal processing module that performs second filtering and second amplification on the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal to obtain the 1-1 signal information and the 2-1 signal information; and a third Doppler signal processing module that performs third filtering and third amplification on the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal to obtain the 1-2 signal information and the 2-2 signal information.

[0010] The above Doppler signal processing unit further includes a fourth Doppler signal processing module, wherein the second Doppler signal processing module performs the second filtering to obtain a first-second phase Doppler processing signal and a second-second phase Doppler processing signal, and the fourth Doppler signal processing module performs fourth filtering and fourth amplification on the first-second phase Doppler processing signal and the second-second phase Doppler processing signal to obtain the first-first signal information and the second-first signal information.

[0011] The first to fourth phase Doppler signal processing modules perform the first to fourth filtering and the first to fourth amplification using preset values ​​input by the administrator, and at least two of the first to fourth filtering and the first to fourth amplification can be performed with different values.

[0012] According to one aspect of the present invention, a method for obtaining bio / movement signal information using a Doppler signal is provided. The method for obtaining bio / movement signal information using a Doppler signal includes a Doppler signal obtaining step of emitting a radar signal to a subject of observation using a Doppler signal obtaining unit, obtaining a signal reflected by the radar signal to obtain a Doppler signal, and processing the Doppler signal to obtain a first phase Doppler signal and a second phase Doppler signal; a Doppler signal processing step of processing the first phase Doppler signal and the second phase Doppler signal, respectively, using a Doppler signal processing unit to obtain first signal information and second signal information; and a signal information output step of obtaining the first signal information and the second signal information using a signal information output unit, and analyzing the first signal information and the second signal information, respectively, using a preset algorithm to obtain bio / movement signal information and movement signal information.

[0013] In the first paragraph, the first signal information and the second signal information obtained through the first phase Doppler signal may include 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal may include 2-1 signal information and 2-2 signal information.

[0014] The above Doppler signal processing step may include a first Doppler signal processing step of performing first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a 1-1 phase Doppler processed signal and a 2-1 phase Doppler processed signal; a second Doppler signal processing step of performing second filtering and second amplification on the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal to obtain the 1-1 signal information and the 2-1 signal information; and a third Doppler signal processing step of performing third filtering and third amplification on the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal to obtain the 1-2 signal information and the 2-2 signal information.

[0015] The above Doppler signal processing step further includes a fourth Doppler signal processing step, and the second Doppler signal processing step performs the second filtering to obtain a first-second phase Doppler processed signal and a second-second phase Doppler processed signal, and the fourth Doppler signal processing step can perform a fourth filtering and a fourth amplification on the first-second phase Doppler processed signal and the second-second phase Doppler processed signal to obtain the first-first signal information and the second-first signal information. In the first to fourth phase Doppler signal processing steps, the first to fourth filtering and the first to fourth amplification are performed using a setting value previously input by an administrator, and at least two of the first to fourth filtering and the first to fourth amplification can be performed with different values.

[0016] According to one aspect of the present invention, a sleep state determination system using a Doppler signal is provided. The sleep state determination system using a Doppler signal comprises: a Doppler signal acquisition unit that emits a radar signal to a subject of observation, obtains a signal reflected by the radar signal to obtain a Doppler signal, and processes the Doppler signal to obtain a first phase Doppler signal and a second phase Doppler signal; a Doppler signal processing unit that processes the first phase Doppler signal and the second phase Doppler signal, respectively, to obtain first signal information and second signal information; And a sleep state determination unit that obtains the first signal information and the second signal information, analyzes the first signal information and the second signal information using a preset algorithm to obtain bio-signal information and movement signal information, and determines the sleep state of the subject of observation using the bio-signal and movement information; wherein the first signal information and the second signal information obtained through the first phase Doppler signal include 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal include 2-1 signal information and 2-2 signal information.

[0017] The Doppler signal processing unit may include a first Doppler signal processing module that performs first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a 1-1 phase Doppler processed signal and a 2-1 phase Doppler processed signal; a second Doppler signal processing module that performs second filtering and second amplification on the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal to obtain the 1-1 signal information and the 2-1 signal information; and a third Doppler signal processing module that performs third filtering and third amplification on the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal to obtain the 1-2 signal information and the 2-2 signal information.

[0018] The sleep state determination unit may include a signal information classification module that acquires a signal having a low frequency among the first signal information and the second signal information as the biosignal information and acquires another signal as the movement signal information; a signal analysis module that applies a preset algorithm to the biosignal information and the movement signal information and acquires bioinformation and movement information as a result of the application; and a sleep state output module that compares the bioinformation and movement information with a preset standard and outputs sleep information corresponding to the preset standard that matches as the sleep state.

[0019] The above preset algorithm is a fast Fourier transform (FFT), and determines the periodicity of the biosignal information, and if the biosignal information has periodicity, the corresponding signal information can be acquired as the bioinformation.

[0020] The above-described preset criteria include at least one of a sleep entry section, a deep sleep section, a tossing and turning section, an apnea section, and a snoring section, and the sleep state output module can distinguish the deep sleep section and the apnea section through a ratio of respiration biometric information and heart rate biometric information included in the biometric information.

[0021] According to one aspect of the present invention, a method for determining a sleep state using a Doppler signal is provided. The method for determining a sleep state using a Doppler signal includes: a Doppler signal obtaining step of emitting a radar signal to a subject of observation using a Doppler signal obtaining unit, obtaining a signal reflected by the radar signal to obtain a Doppler signal, and processing the Doppler signal to obtain a first phase Doppler signal and a second phase Doppler signal; a Doppler signal processing step of processing the first phase Doppler signal and the second phase Doppler signal using a Doppler signal processing unit to obtain first signal information and second signal information; And a sleep state determination step of obtaining the first signal information and the second signal information using a sleep state determination unit, analyzing the first signal information and the second signal information respectively using a preset algorithm to obtain bio-signal information and movement signal information, and determining the sleep state of the subject of observation using the bio-signal and movement information; wherein the first signal information and the second signal information obtained through the first phase Doppler signal are 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal include 2-1 signal information and 2-2 signal information.

[0022] The above Doppler signal processing step may include a first Doppler signal processing step of performing first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a 1-1 phase Doppler processed signal and a 2-1 phase Doppler processed signal; a second Doppler signal processing step of performing second filtering and second amplification on the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal to obtain the 1-1 signal information and the 2-1 signal information; and a third Doppler signal processing step of performing third filtering and third amplification on the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal to obtain the 1-2 signal information and the 2-2 signal information.

[0023] The sleep state determination step may include a signal information distinction step of acquiring a signal having a low frequency among the first signal information and the second signal information as the biosignal information and acquiring another signal as the movement signal information; a signal analysis step of applying a preset algorithm to the biosignal information and the movement signal information and acquiring bioinformation and movement information as a result of the application; and a sleep state output step of comparing the bioinformation and movement information with a preset standard and outputting sleep information corresponding to the preset standard that matches as the sleep state.

[0024] The above preset algorithm is a fast Fourier transform (FFT), and determines the periodicity of the biosignal information, and if the biosignal information has periodicity, the corresponding signal information can be acquired as the bioinformation.

[0025] The above-described preset criteria include at least one of a sleep entry section, a deep sleep section, a tossing and turning section, an apnea section, and a snoring section, and the sleep state output step can distinguish the deep sleep section and the apnea section through the ratio of respiration biometric information and heart rate biometric information included in the biometric information.

[0026] A system and method for obtaining bio / movement signal information using a Doppler signal according to one embodiment of the present invention and a system and method for determining a sleep state using the same emit a radar signal to a subject of observation, and analyze a Doppler signal generated through a reflected wave obtained by reflecting the emitted radar signal, thereby obtaining bio / movement signal information of the subject of observation from the Doppler signal.

[0027] In addition, the system and method for obtaining bio / movement signal information using a Doppler signal according to one embodiment of the present invention and the system and method for determining sleep status using the same have the effect of not disturbing the user's sleep by not affecting the user's body by obtaining bio-activity information while the user is sleeping using radar.

[0028] In addition, a system and method for obtaining bio / movement signal information using a Doppler signal according to one embodiment of the present invention and a system and method for determining a sleep state using the same have the effect of accurately determining a sleep state for each sleep section of a user using the user's breathing and heart rate information.

[0029] FIG. 1 is a block diagram of a sleep state determination system using a Doppler signal according to an embodiment of the present invention.

[0030] Fig. 2 is a block diagram of the Doppler signal acquisition unit of Fig. 1.

[0031] Figure 3 is a block diagram of the Doppler signal processing unit of Figure 1.

[0032] Fig. 4 is a block diagram of the sleep state determination unit of Fig. 1.

[0033] Figure 5 is a flowchart of a method for determining sleep status using a Doppler signal according to an embodiment of the present invention.

[0034] Figure 6 is a flowchart of step S11 of Figure 5.

[0035] Figure 7 is a flowchart of step S13 of Figure 5.

[0036] Figure 8 is a flowchart of step S15 of Figure 5.

[0037] Figure 9 is a graph showing the results of an actual simulation experiment using one embodiment of the present invention.

[0038] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to exemplary drawings. When adding reference numerals to components in each drawing, identical components may have the same numerals as much as possible even if they are shown in different drawings. In addition, when describing the present embodiments, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the technical idea of ​​the present invention, the detailed description may be omitted. When "includes," "has," "consists of," etc. are used in this specification, other parts may be added unless "only" is used. When a component is expressed in the singular, it may include a case in which the plural is included unless specifically stated otherwise.

[0039] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of the present disclosure. These terms are only intended to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by the terms.

[0040] In a description of the positional relationship of components, when it is described that two or more components are "connected," "combined," or "connected," it should be understood that the two or more components may be directly "connected," "combined," or "connected," but that the two or more components may also be further "interposed" with another component to be "connected," "combined," or "connected." Here, the other component may be included in one or more of the two or more components that are "connected," "combined," or "connected" to each other.

[0041] In the description of the temporal flow relationship related to components, operation methods, or manufacturing methods, for example, when the temporal or flow relationship is described as “after”, “following”, “next to”, “before”, etc., it may also include cases where it is not continuous, unless “immediately” or “directly” is used.

[0042] Meanwhile, when numerical values ​​or corresponding information (e.g., levels, etc.) for components are mentioned, even without separate explicit description, the numerical values ​​or corresponding information may be interpreted as including an error range that may occur due to various factors (e.g., process factors, internal or external impact, noise, etc.).

[0043] FIGS. 1 to 3 illustrate an embodiment of a bio / motion signal information acquisition system using a Doppler signal according to the present invention. FIG. 1 is a block diagram of a bio / motion signal information acquisition system using a Doppler signal according to an embodiment of the present invention, FIG. 2 is a block diagram of a Doppler signal acquisition unit of FIG. 1, and FIG. 3 is a block diagram of a Doppler signal processing unit of FIG. 1. Hereinafter, the bio / motion signal information acquisition system using a Doppler signal according to the present invention will be described in detail using FIGS. 1 to 3.

[0044] A system (1) for acquiring bio / motion signal information using a Doppler signal according to one embodiment of the present invention is configured to acquire a Doppler signal after emitting a radar signal to a subject of observation, and to perform multiple filtering and amplification processes on the acquired Doppler signal to acquire a bio / motion signal and a motion signal. To this end, the system (1) for acquiring bio / motion signal information using a Doppler signal according to one embodiment of the present invention may be configured to include a Doppler signal acquisition unit (11), a Doppler signal processing unit (13), and a signal information output unit (15), as illustrated in FIG. 1.

[0045] The Doppler signal acquisition unit (11) is configured to emit a radar signal to an observation target, acquire a signal that is reflected and returned by the radar signal to acquire a Doppler signal, and process the Doppler signal to acquire a first phase Doppler signal and a second phase Doppler signal.

[0046] In the case of radar signals, a Doppler signal is generated when there is movement of the subject of observation. The Doppler signal acquisition unit (11) of the present invention can be configured to emit a radar signal to the subject of observation by utilizing the characteristics of such Doppler radar and acquire a Doppler signal through the reflected signal. To this end, the Doppler signal acquisition unit (11) according to one embodiment of the present invention can include a radar signal emission module (111), a Doppler signal conversion module (113), and a Doppler signal separation module (115), as illustrated in FIG. 2.

[0047] The radar signal emission module (111) is configured to emit a radar signal to an observation target, and the Doppler signal conversion module (113) is configured to obtain a Doppler signal by obtaining a radar signal reflected back from the observation target. In one embodiment of the present invention, a Doppler signal can be obtained using a 24 GHz radar signal.

[0048] The Doppler signal separation module (115) is configured to process the Doppler signal obtained from the Doppler signal conversion module (113) to obtain a first phase Doppler signal and a second phase Doppler signal. Here, the first phase Doppler signal may be processed to have a phase difference of 90 degrees from the second phase Doppler signal.

[0049] When the first phase Doppler signal and the second phase Doppler signal are acquired from the Doppler signal acquisition unit (11), the Doppler signal processing unit (13) according to one embodiment of the present invention is configured to process the first phase Doppler signal and the second phase Doppler signal, respectively, to acquire first signal information and second signal information. The first signal information and the second signal information can be acquired from the first phase Doppler signal and the second phase Doppler signal, respectively.

[0050] The first signal information and the second signal information obtained through the first phase Doppler signal can be defined as 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal can be defined as 2-1 signal information and 2-2 signal information.

[0051] For this purpose, the Doppler signal processing unit (13) of the present invention can be formed to include a first Doppler signal processing module (131), a second Doppler signal processing module (133), and a third Doppler signal processing module (135) as illustrated in FIG. 3. For convenience of explanation, the Doppler signal processing unit (13) of the present invention is described below as using three or more Doppler signal processing modules. However, the present invention is not limited thereto and may operate using N Doppler signal processing modules set by an administrator.

[0052] The first Doppler signal processing module (131) is configured to perform first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a first-first phase Doppler processing signal and a second-first phase Doppler processing signal.

[0053] The first Doppler signal processing module (131) is configured to perform processing on the first phase Doppler signal and the second phase Doppler signal, and although the present invention has described that one first Doppler signal processing module (131) performs processing on the first and second phase Doppler signals, the present invention is not necessarily limited thereto, and as illustrated in FIG. 7, a 1-1 Doppler signal processing module for processing the first phase Doppler signal and a 1-2 Doppler signal processing module for processing the second phase Doppler signal may each be provided.

[0054] The first filtering performed in the first Doppler signal processing module (131) may be a process in which a low-pass filter (LPF) is performed by applying a filter of a frequency band set by the administrator. In addition, the first amplification performed in the first Doppler signal processing module (131) may be a process in which the input first and second phase Doppler signals are amplified by an amplification multiple set by the administrator. An active filter may be used as the first Doppler signal processing module (131) according to one embodiment of the present invention, and the active filter is a filter that performs amplification and filtering simultaneously by utilizing circuit characteristics.

[0055] When the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal are generated through the first filtering and the first amplification, the generated 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal are transmitted to the 2nd Doppler signal processing module (133) and the 3rd Doppler signal processing module (135) through a branch circuit. The 2nd Doppler signal processing module (133) and the 3rd Doppler signal processing module (135) are connected in parallel, and both the 2nd Doppler signal processing module (133) and the 3rd Doppler signal processing module (135) process the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal, but the two modules are configured to perform different processing.

[0056] To be more specific, the second Doppler signal processing module (133) and the third Doppler signal processing module (135) are connected to the first Doppler signal processing module (131), and the second Doppler signal processing module (133) and the third Doppler signal processing module (135) can be connected to each other in a parallel structure.

[0057] This is because, in one embodiment of the present invention, the second Doppler signal processing module (133) and the third Doppler signal processing module (135) are configured to process signals below a preset frequency or to process signals above a preset reference frequency, respectively. In one embodiment of the present invention, when the second Doppler signal processing module (133) is configured to process signals below a preset frequency, the third Doppler signal processing module (135) may be configured to process signals above a preset frequency. This simply means that processing of different frequency bands is performed through different Doppler signal processing modules, and it is also possible for the second Doppler signal processing module (133) and the third Doppler signal processing module (135) to perform processing of opposite frequency bands.

[0058] In addition, by applying such a parallel structure, in one embodiment of the present invention, the second Doppler signal processing module (133) and the third Doppler signal processing module (135) may have different amplification ratios. To this end, the second Doppler signal processing module (133) and the third Doppler signal processing module (135) may be formed such that additional Doppler signal processing modules are further connected to each other. The fourth Doppler signal processing module (137) described later in the present invention may be the additional Doppler signal processing module described above.

[0059] The second Doppler signal processing module (133) is configured to perform second filtering and second amplification on the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal to obtain the 1-1 signal information and the 2-1 signal information.

[0060] The second Doppler signal processing module (133) is configured to perform processing on the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal, and although the present invention has described that one second Doppler signal processing module (133) performs processing on the 1-1 and 2-1 phase Doppler processing signals, the present invention is not necessarily limited thereto, and as illustrated in FIG. 7, a 2-1 Doppler signal processing module for processing the 1-1 phase Doppler signal and a 2-2 Doppler signal processing module for processing the 2-1 phase Doppler signal may each be provided.

[0061] The second filtering performed in the second Doppler signal processing module (133) may be a process in which a DC component is removed from the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal, and a high-pass filter (HPF) is performed by applying a filter of a frequency band set by the administrator.

[0062] In addition, the second amplification performed in the second Doppler signal processing module (133) may be a process of amplifying the input 1-1 phase Doppler processing signal and the 2-2 phase Doppler processing signal by an amplification multiplier set by the administrator. An active filter may be used as the second Doppler signal processing module (133) according to one embodiment of the present invention, and the active filter is a filter that performs amplification and filtering simultaneously by utilizing circuit characteristics.

[0063] The third Doppler signal processing module (135) is configured to obtain the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal, which are the same signals as the signals processed by the 2nd Doppler signal processing module (133), and to perform third filtering and third amplification on the obtained 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal to obtain 1-2 signal information and 2-2 signal information.

[0064] The third Doppler signal processing module (135) is configured to perform processing on the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal, and although the present invention has described that one third Doppler signal processing module (135) performs processing on the 1-1 and 2-1 phase Doppler processing signals, the present invention is not necessarily limited thereto, and as illustrated in FIG. 7, a 3-1 Doppler signal processing module for processing the 1-1 phase Doppler signal and a 3-2 Doppler signal processing module for processing the 2-1 phase Doppler signal may each be provided.

[0065] The third filtering performed in the third Doppler signal processing module (135) may be a process in which a low-pass filter (LPF) and a high-pass filter (HPF) are performed by applying a filter of a frequency band range set by the administrator. In addition, the third amplification performed in the third Doppler signal processing module (135) may be a process in which the input 1-1 and 2-1 phase Doppler processing signals are amplified by an amplification multiplier set by the administrator. An active filter may be used as the third Doppler signal processing module (135) according to one embodiment of the present invention, and the active filter is a filter that performs amplification and filtering simultaneously by utilizing circuit characteristics.

[0066] Meanwhile, in another embodiment of the present invention, a fourth Doppler signal processing module (137) may be further included as illustrated in FIG. 3. The fourth Doppler signal processing module (137) may be configured to process the processing result of the second Doppler signal processing module (135). At this time, when the fourth Doppler signal processing module (137) exists, the first Doppler signal processing module (131), the second Doppler signal processing module (133), and the fourth Doppler signal processing module (137) may be connected in series. In addition, the signal output from the second Doppler signal processing module (133) may be a first-second phase Doppler processing signal and a second-second phase Doppler processing signal, rather than the first-first signal information and the second-first signal information.

[0067] When the 1-2 phase Doppler processing signal and the 2-2 phase Doppler processing signal are obtained from the 2nd Doppler signal processing module (133), the 4th Doppler signal processing module (137) is configured to perform the 4th filtering and the 4th amplification on the 1-2 phase Doppler processing signal and the 2-2 phase Doppler processing signal to obtain the 1-1 signal information and the 2-1 signal information.

[0068] The fourth Doppler signal processing module (137) is configured to perform processing on the 1-2 phase Doppler processing signal and the 2-2 phase Doppler processing signal, and although the present invention has described that one fourth Doppler signal processing module (137) performs processing on the 1-2 and 2-2 phase Doppler processing signals, the present invention is not necessarily limited thereto, and as illustrated in FIG. 7, a 4-1 Doppler signal processing module for processing the 1-2 phase Doppler signal and a 4-2 Doppler signal processing module for processing the 2-2 phase Doppler signal may each be provided.

[0069] The fourth filtering performed in the fourth Doppler signal processing module (137) may be a process of applying a low-pass filter (LPF) by applying a filter of a frequency band range set by the administrator to the first-second phase Doppler processing signal and the second-second phase Doppler processing signal, and the fourth amplification may be a process of amplifying the input first-second phase Doppler processing signal and the second-second phase Doppler processing signal by an amplification multiplier set by the administrator.

[0070] An active filter may be used as the fourth Doppler signal processing module (137) according to one embodiment of the present invention, and the active filter is a filter that performs amplification and filtering simultaneously by utilizing circuit characteristics.

[0071] Additionally, the fourth Doppler signal processing module (137) can be configured to apply a DC offset voltage set by the administrator to a signal on which the third filtering and second amplification have been performed.

[0072] In one embodiment of the present invention, the 1-1 signal information and the 2-1 signal information may be information including bio-motion information, and the 1-2 signal information and the 2-2 signal information may be information including movement motion information.

[0073] Accordingly, the signal information output unit (15) according to one embodiment of the present invention is formed to obtain first signal information and second signal information, and analyze the first signal information and the second signal information using a preset algorithm to obtain biosignal information and movement signal information.

[0074] The signal information output unit (15) of the present invention can obtain 1-1 signal information and 2-1 signal information as the first signal information, and 1-2 signal information and 2-2 signal information as the second signal information. That is, in the present invention, the first signal information can be defined as including biological motion information, and the second signal information can be defined as including movement motion information.

[0075] The signal information output unit (15) can be formed to apply the acquired bio-motion information and movement motion information to a preset algorithm to obtain and output bio-signal information and movement signal information from each piece of motion information.

[0076] FIGS. 5 to 7 illustrate an embodiment of a method for obtaining biometric / motion signal information using a Doppler signal according to the present invention. FIG. 5 is a block diagram of a method for obtaining biometric / motion signal information using a Doppler signal according to an embodiment of the present invention, FIG. 6 is a block diagram of a Doppler signal obtaining unit of FIG. 5, and FIG. 7 is a block diagram of a Doppler signal processing unit of FIG. 5. Hereinafter, a method for obtaining biometric / motion signal information using a Doppler signal according to the present invention will be described in detail using FIGS. 5 to 7.

[0077] A method (10) for obtaining bio / movement signal information using a Doppler signal according to an embodiment of the present invention is configured to acquire a Doppler signal after emitting a radar signal to a subject of observation, and to perform multiple filtering and amplification processes on the acquired Doppler signal to obtain a bio / movement signal. To this end, a method (10) for obtaining bio / movement signal information using a Doppler signal according to an embodiment of the present invention may be configured to include a Doppler signal obtaining step (S11), a Doppler signal processing step (S13), and a signal information output step (S15), as illustrated in FIG. 5.

[0078] The Doppler signal acquisition step (S11) is configured to emit a radar signal to an observation target using a Doppler signal acquisition unit, acquire a signal that is reflected and returned by the radar signal to acquire a Doppler signal, and process the Doppler signal to acquire a first phase Doppler signal and a second phase Doppler signal.

[0079] In the case of radar signals, a Doppler signal is generated when there is movement of the subject of observation. The Doppler signal acquisition step (S11) of the present invention can be configured to emit a radar signal to the subject of observation by utilizing the characteristics of such Doppler radar and acquire a Doppler signal through the reflected signal. To this end, the Doppler signal acquisition step (S11) according to one embodiment of the present invention can include a radar signal emission step (S111), a Doppler signal conversion step (S113), and a Doppler signal separation step (S115), as illustrated in FIG. 6.

[0080] The radar signal emission step (S111) is configured to emit a radar signal to an observation target, and the Doppler signal conversion step (S113) is configured to obtain a Doppler signal by obtaining a radar signal reflected back from the observation target. In one embodiment of the present invention, a Doppler signal can be obtained using a 24 GHz radar signal.

[0081] The Doppler signal separation step (S115) is configured to process the Doppler signal obtained from the Doppler signal conversion step (S113) to obtain a first phase Doppler signal and a second phase Doppler signal. Here, the first phase Doppler signal may be processed to have a phase difference of 90 degrees from the second phase Doppler signal.

[0082] When the first phase Doppler signal and the second phase Doppler signal are acquired in the Doppler signal acquisition step (S11), the Doppler signal processing step (S13) according to one embodiment of the present invention is configured to process the first phase Doppler signal and the second phase Doppler signal using a Doppler signal processing unit to acquire first signal information and second signal information. The first signal information and the second signal information can be acquired from the first phase Doppler signal and the second phase Doppler signal, respectively.

[0083] The first signal information and the second signal information obtained through the first phase Doppler signal can be defined as 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal can be defined as 2-1 signal information and 2-2 signal information.

[0084] For this purpose, the Doppler signal processing step (S13) of the present invention can be formed to include a first Doppler signal processing step (S131), a second Doppler signal processing step (S133), and a third Doppler signal processing step (S135) as illustrated in FIG. 7. Hereinafter, for convenience of explanation, the Doppler signal processing step (S13) of the present invention is described as using three or more Doppler signal processing modules. However, the present invention is not limited thereto and may operate using N Doppler signal processing modules set by an administrator.

[0085] The first Doppler signal processing step (S131) ​​is configured to perform first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a first-first phase Doppler processing signal and a second-first phase Doppler processing signal.

[0086] The first Doppler signal processing step (S131) ​​is configured to perform processing on the first phase Doppler signal and the second phase Doppler signal, and although the present invention has described that one first Doppler signal processing step (S131) ​​performs processing on the first and second phase Doppler signals, the present invention is not necessarily limited thereto, and as illustrated in FIG. 7, a 1-1 Doppler signal processing module for processing the first phase Doppler signal and a 1-2 Doppler signal processing module for processing the second phase Doppler signal may each be provided.

[0087] The first filtering performed in the first Doppler signal processing step (S131) ​​may be a process in which a low-pass filter (LPF) is performed by applying a filter of a frequency band set by the administrator. In addition, the first amplification performed in the first Doppler signal processing step (S131) ​​may be a process in which the input first and second phase Doppler signals are amplified by an amplification multiple set by the administrator. An active filter may be used as the first Doppler signal processing step (S131) ​​according to an embodiment of the present invention, and the active filter is a filter that performs amplification and filtering simultaneously by utilizing circuit characteristics.

[0088] When the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal are generated through the first filtering and the first amplification, the generated 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal are transmitted to the 2nd Doppler signal processing stage (S133) and the 3rd Doppler signal processing stage (S135) through a branch circuit. The 2nd Doppler signal processing stage (S133) and the 3rd Doppler signal processing stage (S135) are connected in parallel, and both the 2nd Doppler signal processing stage (S133) and the 3rd Doppler signal processing stage (S135) process the 1-1 phase Doppler processed signal and the 2-1 phase Doppler processed signal, but the two modules are formed to perform different processing.

[0089] To be more specific, the second Doppler signal processing step (S133) and the third Doppler signal processing step (S135) are connected to the first Doppler signal processing step (S131), and the second Doppler signal processing step (S133) and the third Doppler signal processing step (S135) can be connected in a parallel structure to each other.

[0090] This is because, in one embodiment of the present invention, the second Doppler signal processing step (S133) and the third Doppler signal processing step (S135) are configured to process a signal below a preset frequency or a signal above a preset reference frequency, respectively. If, in one embodiment of the present invention, the second Doppler signal processing step (S133) is configured to process a signal below a preset frequency, the third Doppler signal processing step (S135) may be configured to process a signal above a preset frequency. This simply means that processing of different frequency bands is performed through different Doppler signal processing modules, and it is also possible for the second Doppler signal processing step (S133) and the third Doppler signal processing step (S135) to perform processing of opposite frequency bands.

[0091] In addition, by applying such a parallel structure, in one embodiment of the present invention, different amplification ratios may be achieved in the second Doppler signal processing step (S133) and the third Doppler signal processing step (S135). To this end, the second Doppler signal processing step (S133) and the third Doppler signal processing step (S135) may each be formed such that additional Doppler signal processing modules are further connected. The fourth Doppler signal processing step (S137) described later in the present invention may be the additional Doppler signal processing module described above.

[0092] The second Doppler signal processing step (S133) is configured to perform second filtering and second amplification on the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal to obtain the 1-1 signal information and the 2-1 signal information.

[0093] The second Doppler signal processing step (S133) is configured to perform processing on the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal, and although the present invention has described that one second Doppler signal processing step (S133) performs processing on the 1-1 and 2-1 phase Doppler processing signals, the present invention is not necessarily limited thereto, and as illustrated in FIG. 7, a 2-1 Doppler signal processing module for processing the 1-1 phase Doppler signal and a 2-2 Doppler signal processing module for processing the 2-1 phase Doppler signal may each be provided.

[0094] The second filtering performed in the second Doppler signal processing step (S133) may be a process in which a DC component is removed from the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal, and a high-pass filter (HPF) is performed by applying a filter of a frequency band set by the administrator.

[0095] In addition, the second amplification performed in the second Doppler signal processing step (S133) may be a process of amplifying the input 1-1 phase Doppler processing signal and the 2-2 phase Doppler processing signal by an amplification multiplier set by the administrator. An active filter may be used as the second Doppler signal processing step (S133) according to one embodiment of the present invention, and the active filter is a filter that performs amplification and filtering simultaneously by utilizing circuit characteristics.

[0096] The third Doppler signal processing step (S135) is configured to obtain a 1-1 phase Doppler processing signal and a 2-1 phase Doppler processing signal, which are the same signals as the signals processed in the 2nd Doppler signal processing step (S133), and to perform a third filtering and a third amplification on the obtained 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal to obtain 1-2 signal information and 2-2 signal information.

[0097] The third Doppler signal processing step (S135) is configured to perform processing on the 1-1 phase Doppler processing signal and the 2-1 phase Doppler processing signal, and although the present invention has described that one third Doppler signal processing step (S135) performs processing on the 1-1 and 2-1 phase Doppler processing signals, the present invention is not necessarily limited thereto, and as illustrated in FIG. 7, a 3-1 Doppler signal processing module for processing the 1-1 phase Doppler signal and a 3-2 Doppler signal processing module for processing the 2-1 phase Doppler signal may each be provided.

[0098] The third filtering performed in the third Doppler signal processing step (S135) may be a process in which a low-pass filter (LPF) and a high-pass filter (HPF) are performed by applying a filter of a frequency band range set by the administrator. In addition, the third amplification performed in the third Doppler signal processing step (S135) may be a process in which the input 1-1 and 2-1 phase Doppler processing signals are amplified by an amplification multiplier set by the administrator. An active filter may be used as the third Doppler signal processing step (S135) according to an embodiment of the present invention, and the active filter is a filter that performs amplification and filtering simultaneously by utilizing circuit characteristics.

[0099] Meanwhile, in another embodiment of the present invention, a fourth Doppler signal processing step (S137) may be further included as illustrated in FIG. 7. The fourth Doppler signal processing step (S137) may be configured to process the processing result of the second Doppler signal processing step (S135). At this time, when the fourth Doppler signal processing step (S137) exists, the first Doppler signal processing step (S131), the second Doppler signal processing step (S133), and the fourth Doppler signal processing step (S137) may be connected in series. In addition, the signal output from the second Doppler signal processing step (S133) may be a first-second phase Doppler processing signal and a second-second phase Doppler processing signal, rather than the first-first signal information and the second-first signal information.

[0100] When the 1-2 phase Doppler processing signal and the 2-2 phase Doppler processing signal are obtained from the 2nd Doppler signal processing step (S133), the 4th Doppler signal processing step (S137) is formed to perform the 4th filtering and the 4th amplification on the 1-2 phase Doppler processing signal and the 2-2 phase Doppler processing signal to obtain the 1-1 signal information and the 2-1 signal information.

[0101] The fourth Doppler signal processing step (S137) is configured to perform processing on the 1-2 phase Doppler processing signal and the 2-2 phase Doppler processing signal, and although the present invention has described that one fourth Doppler signal processing step (S137) performs processing on the 1-2 and 2-2 phase Doppler processing signals, the present invention is not necessarily limited thereto, and as illustrated in FIG. 7, a 4-1 Doppler signal processing module for processing the 1-2 phase Doppler signal and a 4-2 Doppler signal processing module for processing the 2-2 phase Doppler signal may each be provided.

[0102] The fourth filtering performed in the fourth Doppler signal processing step (S137) may be a process of applying a low-pass filter (LPF) by applying a filter of a frequency band range set by the administrator to the first-second phase Doppler processing signal and the second-second phase Doppler processing signal, and the fourth amplification may be a process of amplifying the input first-second phase Doppler processing signal and the second-second phase Doppler processing signal by an amplification multiplier set by the administrator.

[0103] An active filter may be used as the fourth Doppler signal processing step (S137) according to one embodiment of the present invention, and the active filter is a filter that performs amplification and filtering simultaneously by utilizing circuit characteristics.

[0104] In addition, the fourth Doppler signal processing step (S137) can be configured to apply a DC offset voltage set by the administrator to the signal on which the third filtering and second amplification have been performed.

[0105] In one embodiment of the present invention, the 1-1 signal information and the 2-1 signal information may be information including bio-motion information, and the 1-2 signal information and the 2-2 signal information may be information including movement motion information.

[0106] Therefore, the signal information output step (S15) according to one embodiment of the present invention is configured to obtain first signal information and second signal information using a signal information output unit, and analyze the first signal information and the second signal information using a preset algorithm to obtain biosignal information and movement signal information.

[0107] The signal information output step (S15) of the present invention can obtain first-1 signal information and second-1 signal information as first signal information, and obtain first-2 signal information and second-2 signal information as second signal information. That is, in the present invention, the first signal information can be defined as including biological motion information, and the second signal information can be defined as including movement motion information.

[0108] The signal information output step (S15) can be configured to apply the acquired bio-motion information and movement motion information to a preset algorithm to obtain and output bio-signal information and movement signal information from each piece of motion information.

[0109] Meanwhile, a sleep state determination system (1) using a Doppler signal according to one embodiment of the present invention can be configured to determine a sleep state using signal information by converting a signal information output unit (15) into a sleep state determination unit (15), as illustrated in FIG. 1. To this end, FIG. 4 discloses a block diagram of a sleep state determination unit (15) of the present invention.

[0110] Referring to FIG. 4, a sleep state determination unit (15) according to one embodiment of the present invention is configured to obtain first signal information and second signal information, and analyze the first signal information and the second signal information using a preset algorithm to obtain biosignal information and movement signal information.

[0111] The sleep state determination unit (15) of the present invention is configured to obtain first signal information and second signal information, analyze the first signal information and the second signal information using a preset algorithm to obtain bio-signal information and movement signal information, and determine the sleep state of the subject of observation using the bio-signal and movement information. To this end, the sleep state determination unit (15) according to one embodiment of the present invention may be configured to include a signal information classification module (151), a signal analysis module (153), and a sleep state output module (155), as illustrated in FIG. 4.

[0112] The signal information classification module (151) is configured to acquire a signal having a lower frequency among the first signal information and the second signal information as biosignal information and to acquire another signal as movement signal information. According to one embodiment of the present invention described above, the signal information classification module (151) can acquire, for example, the first signal information, the 1-1 signal information and the 2-1 signal information, as biosignal information, and can acquire the second signal information, the 1-2 signal information and the 2-2 signal information, as movement signal information.

[0113] The signal analysis module (153) is configured to apply a preset algorithm to biosignal information and movement signal information, and to obtain bioinformation and movement information as a result of the application. Here, the preset algorithm is a fast Fourier transform (FFT), and determines the periodicity of the biosignal information, and if the biosignal information has periodicity, the corresponding signal information can be obtained as bioinformation. The bioinformation is classified into respiration bioinformation and heartbeat bioinformation, and can be obtained by distinguishing the bioinformation using a preset classification algorithm. The preset classification algorithm may be an algorithm that confirms the period of an energy spectrum obtained as a result of the fast Fourier transform, and distinguishes the bioinformation into respiration bioinformation and heartbeat bioinformation using the period. This is because respiration and heartbeat are bioactivities that occur in a certain period. In one embodiment of the present invention, the respiration bioinformation may be respiration energy spectrum, and the heartbeat bioinformation may be heartbeat energy spectrum information.

[0114] In addition, in one embodiment of the present invention, the signal analysis module (153) can compare biometric information that does not have periodicity with movement information, and if the biometric information has a size lower than a preset ratio compared to the movement information, the biometric signal information can be acquired as specific biometric information. In the case of biometric information that has a size exceeding a preset ratio, it can be determined as motion energy spectrum information generated due to the user's body movement. Here, the specific biometric information can be, for example, spectrum energy generated by snoring.

[0115] The sleep state output module (155) is configured to compare biometric information and movement information with preset criteria and output sleep information corresponding to the preset criteria as a sleep state. Here, the preset criteria include at least one of a sleep entry period, a deep sleep period, a tossing and turning period, an apnea period, and a snoring period, and the deep sleep period and the apnea period can be distinguished through the ratio of respiration biometric information and heartbeat biometric information included in the biometric information.

[0116] The overall sleep period may include at least one of the sleep onset period, deep sleep period, tossing and turning period, apnea period, and snoring period. The sleep onset period refers to the period in which the user enters sleep, and is a period that can be used to determine whether or not the user enters sleep, which statistically occurs in almost all users. In addition, the deep sleep period refers to the sleep period in which the user's physical activity is maintained stably, and the tossing and turning period refers to the sleep period in which the user moves during physical activity. In addition, the apnea period refers to the sleep period in which no breathing occurs during physical activity, and the snoring period refers to the sleep period in which snoring occurs during physical activity.

[0117] The higher the proportion of deep sleep and the lower the proportion of resting sleep, the higher the quality of sleep. Therefore, if the present invention can define each sleep period, it will not only be possible to obtain information about the user's sleep quality, but also use this information to provide personalized sleep quality prescriptions tailored to each user.

[0118] The sleep state output module (155) can determine and output the sleep state using preset state judgment criteria. In general, since the magnitude of physical activity occurring in breathing motion is greater than the magnitude of physical activity occurring in heart rate motion, the magnitude of the respiration energy spectrum appears to be greater than the magnitude of the heart rate energy spectrum in a stable sleep section. In addition, in the snoring section, high-frequency vibrations may be captured, and additional spectra other than the respiration energy spectrum and the heart rate energy spectrum may appear. In addition, in the apnea section, since no breathing motion occurs or occurs weakly, the magnitude of the respiration energy spectrum may decrease by the magnitude of the heart rate energy spectrum.

[0119] The sleep state output module (155) of the present invention can define, for example, a section in which the spectral ratio, which is the ratio of the respiratory energy spectrum to the heart rate energy spectrum, is 5:5 or more as a deep sleep section.

[0120] In addition, the sleep state output module (155) can define a section in which specific biometric information with a spectrum ratio of less than 5:5 is acquired at a preset size or less as a snoring section, and if specific biometric information is not acquired for a preset period of time, the section can be defined as an apnea section.

[0121] In another embodiment of the present invention, the sleep state output module (155) may define the sleep section using the sleep entry section in addition to the spectrum ratio. Since tossing and turning, apnea, and snoring generally do not occur in the sleep entry section, similar to the deep sleep section, the sleep state output module (155) of the present invention may be configured to first obtain the sleep entry section and determine the deep sleep section based on the obtained sleep entry section. In addition, the sleep state output module (155) may set the sleep entry section as a section until the ratio of respiration biometric information and heart rate biometric information is equal to a preset sleep entry ratio and movement information is obtained at a preset size or less.

[0122] As described above, the method (10) for determining a sleep state using a Doppler signal according to one embodiment of the present invention can be configured to determine a sleep state using signal information by converting the signal information output step (S15) into a sleep state determination step (S15), as illustrated in FIG. 5. To this end, FIG. 8 discloses a flowchart of the sleep state determination step (S15) of the present invention.

[0123] Referring to FIG. 8, the sleep state determination step (S15) according to one embodiment of the present invention is configured to obtain first signal information and second signal information using a sleep state determination unit, and analyze the first signal information and the second signal information using a preset algorithm to obtain biosignal information and movement signal information.

[0124] The sleep state determination step (S15) of the present invention is configured to acquire first signal information and second signal information, analyze the first signal information and the second signal information using a preset algorithm to acquire bio-signal information and movement signal information, and determine the sleep state of the subject of observation using the bio-signal and movement information. To this end, the sleep state determination step (S15) according to one embodiment of the present invention may be configured to include a signal information distinction step (S151), a signal analysis step (S153), and a sleep state output step (S155), as illustrated in FIG. 4.

[0125] The signal information distinction step (S151) is configured to acquire a signal having a lower frequency among the first signal information and the second signal information as biosignal information and to acquire another signal as movement signal information. According to one embodiment of the present invention described above, the signal information distinction step (S151) may, for example, acquire the first signal information, 1-1 signal information and 2-1 signal information, as biosignal information, and may acquire the second signal information, 1-2 signal information and 2-2 signal information, as movement signal information.

[0126] The signal analysis step (S153) is configured to apply a preset algorithm to biosignal information and movement signal information, and to obtain biosignal information and movement information as a result of the application. Here, the preset algorithm is a fast Fourier transform (FFT), and determines the periodicity of the biosignal information, and if the biosignal information has periodicity, the corresponding signal information can be obtained as biosignal information. The biosignal information is classified into respiration bioinformation and heartbeat bioinformation, and can be obtained by distinguishing the biosignal information using a preset classification algorithm. The preset classification algorithm may be an algorithm that confirms the period of the energy spectrum obtained as a result of the fast Fourier transform, and distinguishes the biosignal information into respiration bioinformation and heartbeat bioinformation using the period. This is because respiration and heartbeat are biological activities that occur in a certain period. In one embodiment of the present invention, the respiration bioinformation may be respiration energy spectrum, and the heartbeat bioinformation may be heartbeat energy spectrum information.

[0127] In addition, in one embodiment of the present invention, the signal analysis step (S153) compares biometric information that does not have periodicity with movement information, and if the biometric information has a size lower than a preset ratio compared to the movement information, the biometric signal information can be acquired as specific biometric information. In the case of biometric information that has a size exceeding a preset ratio, it can be determined as motion energy spectrum information generated due to the user's body movement. Here, the specific biometric information can be, for example, spectrum energy generated by snoring.

[0128] The sleep state output step (S155) is configured to compare biometric information and movement information with preset criteria, and output sleep information corresponding to the preset criteria as a sleep state. Here, the preset criteria include at least one of a sleep entry period, a deep sleep period, a tossing and turning period, an apnea period, and a snoring period, and the deep sleep period and the apnea period can be distinguished through the ratio of respiration biometric information and heart rate biometric information included in the biometric information.

[0129] The overall sleep period may include at least one of the sleep onset period, deep sleep period, tossing and turning period, apnea period, and snoring period. The sleep onset period refers to the period in which the user enters sleep, and is a period that can be used to determine whether or not the user enters sleep, which statistically occurs in almost all users. In addition, the deep sleep period refers to the sleep period in which the user's physical activity is maintained stably, and the tossing and turning period refers to the sleep period in which the user moves during physical activity. In addition, the apnea period refers to the sleep period in which no breathing occurs during physical activity, and the snoring period refers to the sleep period in which snoring occurs during physical activity.

[0130] The higher the proportion of deep sleep and the lower the proportion of resting sleep, the higher the quality of sleep. Therefore, if the present invention can define each sleep period, it will not only be possible to obtain information about the user's sleep quality, but also use this information to provide personalized sleep quality prescriptions tailored to each user.

[0131] The sleep state output step (S155) can determine and output the sleep state using preset state judgment criteria. In general, since the magnitude of physical activity occurring in breathing movements is greater than the magnitude of physical activity occurring in heart rate movements, the magnitude of the respiration energy spectrum appears to be greater than the magnitude of the heart rate energy spectrum in a stable sleep section. In addition, in the snoring section, high-frequency vibrations may be captured, and additional spectra other than the respiration energy spectrum and heart rate energy spectrum may appear. In addition, in the apnea section, since breathing movements do not occur or occur weakly, the magnitude of the respiration energy spectrum may decrease by the magnitude of the heart rate energy spectrum.

[0132] The sleep state output step (S155) of the present invention may define, for example, a section in which the spectral ratio, which is the ratio of the respiratory energy spectrum to the heart rate energy spectrum, is 5:5 or more as a deep sleep section.

[0133] In addition, the sleep state output step (S155) can define a section in which a specific biometric information with a spectrum ratio of less than 5:5 is acquired to a size below a preset size as a snoring section, and if no specific biometric information is acquired for a preset period of time, the section can be defined as an apnea section.

[0134] In another embodiment of the present invention, the sleep state output step (S155) may define the sleep section using the sleep entry section in addition to the spectrum ratio. Since tossing and turning, apnea, and snoring generally do not occur in the sleep entry section, similar to the deep sleep section, the sleep state output step (S155) of the present invention may be configured to first acquire the sleep entry section and determine the deep sleep section based on the acquired sleep entry section. In addition, the sleep state output step (S155) may set the sleep entry section as a section until the ratio of respiration biometric information and heart rate biometric information is equal to a preset sleep entry ratio and movement information is acquired to a preset size or less.

[0135] Meanwhile, Fig. 9 is a graph showing the results of an actual simulation experiment using an embodiment of the present invention. Referring to Fig. 9, the entire sleep section can be represented by A. Section B is the sleep entry section, which is the section that occurs when most users enter sleep statistically as described above, and may be the section where the user's actual sleep begins, which is a section of 10 to 40 minutes, with an average of 20 to 30 minutes. C is the deep sleep section, which is a stable sleep section, D is the snoring section, E is the tossing and turning section, and F is the apnea section.

[0136] Section C is a stable deep sleep section, in which the size of the respiration spectrum energy (a1) is sufficiently larger than the size of the heart rate spectrum energy (b1). In addition, when examining the periodicity of the spectral energy, it can be confirmed that the spectral energy does not include irregular peaks and is repeated at a regular cycle. Therefore, in one embodiment of the present invention, such a sleep section can be defined as a deep sleep section. At this time, as described above, in the present invention, a case in which the ratio of the respiration spectrum energy (a1) to the heart rate spectrum energy (b1) is 5:5 or more can be defined as a deep sleep section, and in another embodiment, a section having a periodicity higher than a preset similarity and an energy lower than a preset size based on the sleep entry section of Section B can be defined as a deep sleep section.

[0137] Section D is a snoring section, in which the size of the respiratory spectrum energy (a2) is formed to be larger than the size of the heartbeat spectrum (b2), but snoring spectrum energy (c2), which does not appear in other sections, is additionally measured. It can be confirmed that section D measures spectral energy at a high frequency, which is higher than the respiratory / heartbeat frequency, like c2. Therefore, in the sleep section definition part and the sleep section defining step of the present invention, section D can be defined as a snoring section in which the user is snoring.

[0138] Section F is an apnea section, in which the size of the respiration spectrum energy (a3) ​​is similar to the size of the heart rate spectrum energy (b3). More specifically, the ratio of the respiration spectrum energy (a) to the heart rate spectrum energy (b3) is less than 5:5, and unlike section D, this section is one in which the snoring spectrum energy (c2) is not measured. This is because, in the process of obtaining a Doppler signal using radar, the size of the acquired respiration spectrum energy (a3) ​​is greatly reduced because the user's body has little or no breathing activity. Therefore, when comparing the size of the respiration spectrum energy (a3) ​​and the size of the heart rate spectrum energy (b3) as in the spectrum analysis result for section F of FIG. 9, if the ratio is less than 5:5, the sleep section definition unit and the sleep section defining step according to an embodiment of the present invention may define section F as an apnea section.

[0139] Section E is a section where tossing and turning occurs, and is a section where spectral energy with a higher energy level is obtained compared to the spectral energy detected in sections B, C, D, F, etc. This is a section where a biological activity with a much higher energy level than the respiration spectral energy or the heart rate spectral energy occurs, and in the present invention, this biological activity is configured to be analyzed as tossing and turning.

[0140] In summary, the sleep state determination system and method including FIGS. 4 and 8 are configured to acquire and analyze a Doppler signal of a user's biological activity using radar, and define a sleep state for each sleep section using respiration spectrum energy and heart rate spectrum energy among the Doppler signals, and the experimental results for this are shown in FIG. 9. By using the present invention described in FIGS. 1 to 9, it is possible to confirm a user's sleep state, and to provide content for responding to an emergency situation or improving the user's sleep quality using the confirmed sleep state.

[0141] The method for determining sleep state using a Doppler signal according to the embodiments of the present invention described above can be implemented as an application (computer program) stored in a storage medium of a computer.

[0142] Here, the computer may include a sleep state determination system using a Doppler signal.

[0143] The computer's operating system may be an operating system such as Windows or Macintosh, which is installed on general PCs such as desktops and laptops, or a mobile-only operating system such as iOS or Android, which is installed on mobile devices such as smartphones and tablet PCs.

[0144] The method for determining sleep state using a Doppler signal according to the embodiments of the present invention described above may be implemented as an application (i.e., a computer program) installed by default in a computer or installed by a user, and may be stored (recorded) in a computer-readable storage medium.

[0145] In this way, in order for a computer to read a program recorded on a storage medium and execute a method for determining sleep state using a Doppler signal according to the embodiments implemented as a program, the application (application program) described above may include code (Code) coded in a computer language such as C, C++, JAVA, or machine language that can be read by a computer processor (CPU).

[0146] Such code may include functional code related to functions defining the aforementioned functions, and may also include control code related to execution procedures required for the computer's processor to execute the aforementioned functions according to a predetermined procedure.

[0147] Additionally, such code may further include memory reference related code regarding where in the internal or external memory of the computer the additional information or media required for the computer's processor to execute the aforementioned functions should be referenced.

[0148] Additionally, if the computer's processor needs to communicate with any other computer or server, etc., located remotely in order to execute the functions described above, the code may further include communication-related code regarding how the computer's processor should communicate with any other computer or server, etc. located remotely, using the computer's communication module (e.g., wired and / or wireless communication module), and what information or media should be sent and received during the communication.

[0149] In addition, the functional program for implementing the present embodiments and the code and code segments related thereto may be easily inferred or changed by programmers in the technical field to which the present invention pertains, taking into consideration the system environment of the computer that reads the storage medium and executes the program.

[0150] Additionally, a computer-readable storage medium recording the aforementioned program can be distributed across network-connected computer systems, allowing the computer-readable code to be stored and executed in a distributed manner. In this case, one or more of the multiple distributed computers can execute some of the functions described above and transmit the results to one or more of the other distributed computers. The computer receiving the results can also execute some of the functions described above and provide the results to the other distributed computers.

[0151] As described above, a computer-readable storage medium that records an application for executing a method for determining a sleep state using a Doppler signal according to embodiments of the present invention may include, for example, a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical media storage device, etc.

[0152] In addition, a computer-readable storage medium recording an application, which is a program for executing a method for determining a sleep state using a Doppler signal according to embodiments of the present invention, may be a storage medium (e.g., a hard disk, etc.) included in an application provider server including an application store server, a web server related to an application or a corresponding service, or the application provider server itself, or another computer recording the program or its storage medium.

[0153] A computer capable of reading a storage medium recording an application program for executing a method for determining sleep state using a Doppler signal according to embodiments of the present invention may include not only general PCs such as general desktops or laptops, but also mobile terminals such as smart phones, tablet PCs, PDAs (Personal Digital Assistants), and mobile communication terminals, and should be interpreted as all computing-capable devices.

[0154] The above description is merely an illustrative illustration of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate, rather than limit, the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0155] 1: Sleep state assessment system using Doppler signals

[0156] 11: Doppler signal acquisition unit 13: Doppler signal processing unit

[0157] 15: Signal information output unit (sleep status determination unit)

[0158] 111: Radar signal emission module 113: Doppler signal conversion module

[0159] 115: Doppler signal separation module 131: First Doppler signal processing module

[0160] 133: Second Doppler signal processing module 135: Third Doppler signal processing module

[0161] 137: 4th Doppler signal processing module 151: Signal information classification module

[0162] 153: Signal Analysis Module 155: Sleep State Output Module

Claims

1. A Doppler signal acquisition unit that emits a radar signal to an observation target, acquires a signal reflected from the radar signal to acquire a Doppler signal, and processes the Doppler signal to acquire a first phase Doppler signal and a second phase Doppler signal; A Doppler signal processing unit that processes the first phase Doppler signal and the second phase Doppler signal, respectively, to obtain first signal information and second signal information; and A system for obtaining bio / movement signal information using a Doppler signal, comprising: a signal information output unit for obtaining the first signal information and the second signal information, and analyzing the first signal information and the second signal information using a preset algorithm to obtain bio / movement signal information and movement signal information.

2. In paragraph 1, A system for obtaining bio / movement signal information using Doppler signals, wherein the first signal information and the second signal information obtained through the first phase Doppler signal include 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal include 2-1 signal information and 2-2 signal information.

3. In paragraph 2, The above Doppler signal processing unit, A first Doppler signal processing module that performs first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a 1-1 phase Doppler processed signal and a 2-1 phase Doppler processed signal; A second Doppler signal processing module that performs second filtering and second amplification on the first-1 phase Doppler processing signal and the second-1 phase Doppler processing signal to obtain the first-1 signal information and the second-1 signal information; and A system for obtaining bio / movement signal information using a Doppler signal, comprising: a third Doppler signal processing module for performing third filtering and third amplification on the first-1 phase Doppler processing signal and the second-1 phase Doppler processing signal to obtain the first-2 signal information and the second-2 signal information.

4. In paragraph 3, The above Doppler signal processing unit, Further comprising a fourth Doppler signal processing module, The above second Doppler signal processing module, By performing the above second filtering, the 1-2 phase Doppler processing signal and the 2-2 phase Doppler processing signal are obtained, The above fourth Doppler signal processing module, A system for obtaining bio / movement signal information using a Doppler signal, which obtains the 1-1 signal information and the 2-1 signal information by performing a fourth filtering and a fourth amplification on the 1-2 phase Doppler processed signal and the 2-2 phase Doppler processed signal.

5. In paragraph 4, The first to fourth phase Doppler signal processing modules are: A system for obtaining bio / movement signal information using a Doppler signal, wherein the first to fourth filtering and the first to fourth amplification are performed using preset values ​​input by an administrator, and at least two of the filtering or amplifications among the first to fourth filtering and the first to fourth amplification are performed with different values.

6. A Doppler signal acquisition step of emitting a radar signal to an observation target using a Doppler signal acquisition unit, acquiring a signal reflected by the radar signal to acquire a Doppler signal, and processing the Doppler signal to acquire a first phase Doppler signal and a second phase Doppler signal; A Doppler signal processing step for processing the first phase Doppler signal and the second phase Doppler signal using a Doppler signal processing unit to obtain first signal information and second signal information; and A method for obtaining bio / movement signal information using a Doppler signal, comprising: a signal information output step of obtaining the first signal information and the second signal information using a signal information output unit, and analyzing the first signal information and the second signal information respectively using a preset algorithm to obtain bio / movement signal information and movement signal information; 7. In paragraph 1, A method for obtaining bio / movement signal information using a Doppler signal, wherein the first signal information and the second signal information obtained through the first phase Doppler signal include 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal include 2-1 signal information and 2-2 signal information.

8. In paragraph 7, The above Doppler signal processing step is, A first Doppler signal processing step of performing first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a 1-1 phase Doppler processed signal and a 2-1 phase Doppler processed signal; A second Doppler signal processing step for performing second filtering and second amplification on the first-1 phase Doppler processing signal and the second-1 phase Doppler processing signal to obtain the first-1 signal information and the second-1 signal information; and A system for obtaining bio / movement signal information using a Doppler signal, comprising: a third Doppler signal processing step for performing third filtering and third amplification on the first-1 phase Doppler processing signal and the second-1 phase Doppler processing signal to obtain the first-2 signal information and the second-2 signal information; 9. In paragraph 8, The above Doppler signal processing step is, Further comprising a fourth Doppler signal processing step, The second Doppler signal processing step is: By performing the above second filtering, the 1-2 phase Doppler processing signal and the 2-2 phase Doppler processing signal are obtained, The fourth Doppler signal processing step is: A method for obtaining bio / movement signal information using a Doppler signal, wherein the 1-1 signal information and the 2-1 signal information are obtained by performing a fourth filtering and a fourth amplification on the 1-2 phase Doppler processed signal and the 2-2 phase Doppler processed signal.

10. In paragraph 9, The first to fourth phase Doppler signal processing steps are: A method for obtaining bio / movement signal information using a Doppler signal, wherein the first to fourth filtering and the first to fourth amplification are performed using preset values ​​entered by an administrator, and at least two of the first to fourth filtering and the first to fourth amplification are performed with different values.

11. A Doppler signal acquisition unit that emits a radar signal to an observation target, acquires a signal reflected from the radar signal to acquire a Doppler signal, and processes the Doppler signal to acquire a first phase Doppler signal and a second phase Doppler signal; A Doppler signal processing unit that processes the first phase Doppler signal and the second phase Doppler signal, respectively, to obtain first signal information and second signal information; and It includes a sleep state determination unit that obtains the first signal information and the second signal information, analyzes the first signal information and the second signal information using a preset algorithm to obtain bio-signal information and movement signal information, and determines the sleep state of the subject of observation using the bio-signal and movement information; The first signal information and the second signal information obtained through the first phase Doppler signal are 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal include 2-1 signal information and 2-2 signal information. A sleep status assessment system using Doppler signals.

12. In paragraph 11, The above Doppler signal processing unit, A first Doppler signal processing module that performs first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a 1-1 phase Doppler processed signal and a 2-1 phase Doppler processed signal; A second Doppler signal processing module that performs second filtering and second amplification on the first-1 phase Doppler processing signal and the second-1 phase Doppler processing signal to obtain the first-1 signal information and the second-1 signal information; and A sleep state determination system using a Doppler signal, comprising: a third Doppler signal processing module that performs third filtering and third amplification on the first-1 phase Doppler processing signal and the second-1 phase Doppler processing signal to obtain the first-2 signal information and the second-2 signal information.

13. In paragraph 12, The above sleep state judgment unit, A signal information classification module that acquires a signal having a low frequency among the first signal information and the second signal information as the biosignal information and acquires another signal as the movement signal information; A signal analysis module that applies a preset algorithm to the bio-signal information and the movement signal information and obtains bio-information and movement information as a result of the application; and A sleep state judgment system using a Doppler signal, comprising: a sleep state output module that compares the above biometric information and movement information with preset criteria and outputs sleep information corresponding to the preset criteria as the sleep state.

14. In paragraph 13, The above preset algorithm is the fast Fourier transform (FFT). A sleep state determination system using a Doppler signal, which determines the periodicity of the above bio-signal information and, if the above bio-signal information has periodicity, acquires the corresponding signal information as the bio-information.

15. In paragraph 14, The above-mentioned criteria are: Includes at least one of the following stages: sleep onset, deep sleep, tossing and turning, apnea, and snoring. The above sleep state output module, A sleep state determination system using Doppler signals, which distinguishes the above-mentioned deep sleep period and the above-mentioned apnea period through the ratio of respiration bio-information and heartbeat bio-information included in the above-mentioned bio-information.

16. A Doppler signal acquisition step of emitting a radar signal to an observation target using a Doppler signal acquisition unit, acquiring a signal reflected by the radar signal to acquire a Doppler signal, and processing the Doppler signal to acquire a first phase Doppler signal and a second phase Doppler signal; A Doppler signal processing step for processing the first phase Doppler signal and the second phase Doppler signal using a Doppler signal processing unit to obtain first signal information and second signal information; and A sleep state determination step of obtaining the first signal information and the second signal information using a sleep state determination unit, analyzing the first signal information and the second signal information using a preset algorithm to obtain bio-signal information and movement signal information, and determining the sleep state of the subject of observation using the bio-signal and movement information; The first signal information and the second signal information obtained through the first phase Doppler signal are 1-1 signal information and 1-2 signal information, and the first signal information and the second signal information obtained through the second phase Doppler signal include 2-1 signal information and 2-2 signal information. A method for assessing sleep status using Doppler signals.

17. In paragraph 16, The above Doppler signal processing step is, A first Doppler signal processing step of performing first filtering and first amplification on the first phase Doppler signal and the second phase Doppler signal to obtain a 1-1 phase Doppler processed signal and a 2-1 phase Doppler processed signal; A second Doppler signal processing step for performing second filtering and second amplification on the first-1 phase Doppler processing signal and the second-1 phase Doppler processing signal to obtain the first-1 signal information and the second-1 signal information; and A method for determining a sleep state using a Doppler signal, comprising: a third Doppler signal processing step of performing third filtering and third amplification on the first-1 phase Doppler processing signal and the second-1 phase Doppler processing signal to obtain the first-2 signal information and the second-2 signal information.

18. In paragraph 17, The above sleep state judgment step is, A signal information distinction step of acquiring a signal having a low frequency among the first signal information and the second signal information as the biosignal information and acquiring another signal as the movement signal information; A signal analysis step of applying a preset algorithm to the bio-signal information and the movement signal information and obtaining bio-information and movement information as a result of the application; and A method for determining a sleep state using a Doppler signal, comprising: a sleep state output step for comparing the above-described biometric information and movement information with preset criteria and outputting sleep information corresponding to the preset criteria as the sleep state.

19. In paragraph 18, The above preset algorithm is the fast Fourier transform (FFT). A method for determining a sleep state using a Doppler signal, wherein the periodicity of the above bio-signal information is determined, and if the above bio-signal information has periodicity, the corresponding signal information is acquired as the bio-information.

20. In paragraph 19, The above-mentioned criteria are: Includes at least one of the following stages: sleep onset, deep sleep, tossing and turning, apnea, and snoring. The above sleep state output step is, A method for determining a sleep state using a Doppler signal, wherein the above-mentioned deep sleep period and the above-mentioned apnea period are distinguished through the ratio of respiration bioinformation and heartbeat bioinformation included in the above-mentioned bioinformation.

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