KR20230029339A - Apparatus for monitoring bio-signal and operating method thereof - Google Patents

Abstract

The present invention relates to a device for monitoring bio-signals and an operating method thereof. The device for monitoring bio-signals according to an embodiment comprises: a bio-signal collection part for collecting the bio-signals of a user; an analog amplification part including at least one resistor, at least one capacitor and a switching element connected to the resistor and the capacitor, and amplifying the collected bio-signals; an analog-digital conversion part for digitizing the amplified bio-signals; and a control part for detecting a change in the usage environment of the user based on the digitized bio-signals, generating feedback signals corresponding to the detected change in the usage environment, and controlling the gain of the analog amplification part based on the generated feedback signals. Therefore, provided are a device for monitoring bio-signals and an operating method thereof, wherein accuracy in the measurement of bio-signals can be improved.

Description

Bio-signal monitoring device and its operating method {APPARATUS FOR MONITORING BIO-SIGNAL AND OPERATING METHOD THEREOF}

The present invention relates to a bio-signal monitoring device and an operating method thereof, and more particularly, to a technical concept of stabilizing a measurement result of a bio-signal that changes according to a use environment.

Recently, along with the rapid development of IT technology and medical information technology, the field of ubiquitous healthcare, which is very useful for health management of users, is rapidly developing.

Since this ubiquitous healthcare service utilizes various devices around life, it is not limited to single-shot or treatment in hospitals, but enables remote monitoring of users anytime, anywhere in real life without restrictions in time and space, such as at home or school. Accordingly, various methods of monitoring bio-signals have been proposed.

Specifically, Korean Patent Publication No. 10-2020-0079691 discloses a technology for measuring a user's biosignal in a non-contact method based on a camera, and Korean Patent Registration No. 10-1659798 discloses an acceleration sensor of a chair-type biosignal monitoring device. Disclosed is a technique for measuring a user's bio-signal in a non-contact manner using.

That is, although the above-described methods measure the user's bio-signals using various bio-signal sensors, the actually measured bio-signals must be measured under various conditions under various environments.

For example, when an acceleration sensor or a piezoelectric sensor is used to measure a user's bio-signal in a sleeping state, the size of the output signal (measurement result of the bio-signal) is measured differently depending on the user's sleeping posture or sleeping environment. This problem may arise.

Korean Patent Publication No. 10-2020-0079691, "Camera-based non-contact bio-signal measurement device and its operation method" Korean Patent Registration No. 10-1659798, "Non-contact non-contact heart rate measurement device for chair using acceleration sensor and its method"

An object of the present invention is to provide a bio-signal monitoring device and method capable of improving the accuracy of bio-signal measurement by stabilizing a signal output as a measurement result of a bio-signal that changes according to a use environment.

In addition, the present invention is intended to provide a bio-signal monitoring device and method capable of stabilizing a signal output as a measurement result of a bio-signal by controlling the gain of an amplifier in response to changes in the use environment.

A bio-signal monitoring device according to an embodiment of the present invention includes a bio-signal collection unit for collecting bio-signals of a user, at least one resistor, at least one capacitor, and a switching element connected to the resistor and the capacitor, respectively. An analog amplifying unit that amplifies the bio-signal, an analog-to-digital conversion unit that digitizes the amplified bio-signal, and detects a change in the user's use environment based on the digitized bio-signal, and responds to the detected change in the use environment. It may include a control unit that generates a feedback signal and controls an amplification rate (gain) of the analog amplification unit based on the generated feedback signal.

According to one side, the analog amplification unit may include a resistor and a capacitor connected in parallel to each other between an input terminal and an output terminal.

According to one side, the control unit may control the amplification rate of the analog amplification unit through control of the switching element based on the generated feedback signal.

According to one side, the control unit may generate a feedback signal based on a pre-stored lookup table (lookup table).

According to one side, the control unit may monitor the amplitude of the digitized bio-signal and generate a feedback signal by determining that the use environment has changed when the monitored amplitude changes by more than a preset threshold during a preset detection time. there is.

According to one side, the bio-signal monitoring device according to an embodiment may further include a result calculation unit that outputs a bio-signal measurement result corresponding to the converted digital signal when the control unit determines that the usage environment has not changed.

According to one side, the bio-signal monitoring device according to an embodiment may be built into at least one of a bed and a mattress of the bed.

An operating method of a bio-signal monitoring device according to an embodiment of the present invention includes the steps of collecting a bio-signal of a user in a bio-signal collection unit, amplifying the bio-signal collected by an analog amplification unit, and an analog-to-digital conversion unit. Digitizing the biosignal amplified in the step of detecting a change in the use environment of the user based on the digitized biosignal in the control unit, generating a feedback signal corresponding to the detected change in the use environment, and based on the generated feedback signal and controlling a gain of the analog amplification unit, wherein the analog amplification unit may include at least one resistor, at least one capacitor, and a switching element connected to the resistor and the capacitor, respectively.

According to one side, the step of controlling the amplification rate may control the amplification rate of the analog amplification unit through control of the switching element based on the feedback signal generated by the control unit.

According to one side, in the step of controlling the amplification factor, the control unit may generate a feedback signal based on a pre-stored lookup table.

According to one side, in the step of controlling the amplification rate, the control unit monitors the amplitude of the converted digital signal, and when the monitored amplitude changes by more than a preset threshold during a preset detection time, it is determined that the use environment has changed. to generate a feedback signal.

According to an embodiment, the present invention can improve the accuracy of bio-signal measurement by stabilizing a signal output as a measurement result of a bio-signal that changes according to a use environment.

According to an embodiment, the present invention can stabilize a signal output as a result of measuring a biosignal by controlling the gain of an amplifier in response to a change in a use environment.

1A to 1C are diagrams for explaining changes in biosignals according to use environments.
2 is a diagram for explaining a bio-signal monitoring device according to an embodiment.
3 is a diagram for explaining an example of an analog amplifying unit included in a bio-signal monitoring device according to an embodiment.
4 is a diagram for explaining a bio-signal monitoring device according to another embodiment.
5 is a diagram for explaining a bio-signal monitoring device according to another embodiment in more detail.
6 is a diagram for explaining an operating method of a bio-signal monitoring device according to an embodiment.
7 is a diagram for explaining an operating method of a bio-signal monitoring device according to another embodiment.

Hereinafter, various embodiments of this document will be described with reference to the accompanying drawings.

Examples and terms used therein are not intended to limit the technology described in this document to specific embodiments, and should be understood to include various modifications, equivalents, and/or substitutes of the embodiments.

In the following description of various embodiments, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the invention, the detailed description will be omitted.

In addition, terms to be described later are terms defined in consideration of functions in various embodiments, and may vary according to usage, intention or custom of an operator, and the like. Therefore, the definition should be made based on the contents throughout this specification.

In connection with the description of the drawings, like reference numerals may be used for like elements.

Singular expressions may include plural expressions unless the context clearly dictates otherwise.

In this document, expressions such as "A or B" or "at least one of A and/or B" may include all possible combinations of the items listed together.

Expressions such as "first," "second," "first," or "second," may modify the corresponding components regardless of order or importance, and are used to distinguish one component from another. It is used, but does not limit the corresponding components.

When a (e.g., first) component is referred to as being "(functionally or communicatively) connected" or "connected" to another (e.g., second) component, a component refers to said other component. It may be directly connected to the element or connected through another component (eg, a third component).

In this specification, "configured to (or configured to)" means "suitable for," "having the ability to," "changed to" depending on the situation, for example, hardware or software ," can be used interchangeably with "made to," "capable of," or "designed to."

In some contexts, the expression "device configured to" can mean that the device is "capable of" in conjunction with other devices or components.

For example, the phrase "a processor configured (or configured) to perform A, B, and C" may include a dedicated processor (eg, embedded processor) to perform the operation, or by executing one or more software programs stored in a memory device. , may mean a general-purpose processor (eg, CPU or application processor) capable of performing corresponding operations.

Also, the term 'or' means 'inclusive or' rather than 'exclusive or'.

That is, unless otherwise stated or clear from the context, the expression 'x employs a or b' means any one of the natural inclusive permutations.

In the above-described specific embodiments, components included in the invention are expressed in singular or plural numbers according to the specific embodiments presented.

However, singular or plural expressions are selected appropriately for the presented situation for convenience of explanation, and the above-described embodiments are not limited to singular or plural components, and even components expressed in plural are composed of a singular number or , Even components expressed in the singular can be composed of plural.

Meanwhile, in the description of the invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the technical idea contained in the various embodiments.

Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, but should be defined by not only the claims to be described later, but also those equivalent to these claims.

1A to 1C are diagrams for explaining changes in biosignals according to use environments.

Referring to FIGS. 1A to 1C , reference numerals 110 to 130 denote bio signals of the same user measured in different usage environments, where the x-axis (0 to 1000) is time and the Y-axis (-600 to 600) represents the magnitude of the measured bio-signal.

Specifically, reference numerals 110 to 130 denote the user's bio-signals measured through a bed-type bio-signal monitoring device that measures the user's bio-signals located on the bed mattress, where different use environments refer to the material of the bed mattress and the bio-signals on the mattress. It may include at least one of the positions of the signal detection sensor.

According to reference numerals 110 to 130, it can be seen that bio-signals are measured differently depending on the use environment even for the same user. Therefore, in order to increase the reliability of bio-signal measurement, a technology capable of transmitting a bio-signal in a stable size under environmental conditions in which such a signal difference occurs is required.

2 is a diagram for explaining a bio-signal monitoring device according to an embodiment.

Referring to FIG. 2 , the bio-signal monitoring apparatus 200 according to an embodiment can improve the accuracy of bio-signal measurement by stabilizing a signal output as a measurement result of a bio-signal that changes according to a use environment.

In addition, the bio-signal monitoring apparatus 200 may stabilize a signal output as a measurement result of the bio-signal by controlling the gain of the amplifier in response to a change in the use environment.

To this end, the bio-signal monitoring device 200 may include a bio-signal collection unit 210, an analog amplification unit 220, an analog-to-digital conversion unit 230, a control unit 240, and a result calculation unit 250. there is. For example, the bio-signal monitoring device 200 may be embedded in a bed or a mattress of a bed.

In other words, the biological signal monitoring device 200 may be provided at a position corresponding to at least one of the frame of the smart bed (or smart mattress) and the mattress M.

The bio-signal collection unit 220 according to an embodiment may collect a user's bio-signal.

For example, the biosignal collection unit 220 may collect the biosignal of the user by using at least one biosignal sensor selected from among an acceleration sensor and a piezoelectric sensor for a predetermined measurement time. The collection unit 220 is not limited thereto, and may collect various kinds of biosignals using various known biosignal detection sensors.

The analog amplification unit 220 according to an embodiment may include at least one resistor, at least one capacitor, and a switching element connected to the resistor and the capacitor, respectively, and the biosignal collected through the biosignal collection unit 210. signal can be amplified.

In other words, the analog amplification unit 220 may receive the biosignals collected from the biosignal collection unit 210 and output an analog signal corresponding to the received biosignals.

For example, the switching element may include at least one of an analog switch and a MOS transistor.

The analog-to-digital conversion unit 230 according to an embodiment may digitize the amplified biosignal. In other words, the analog-to-digital conversion unit 230 may convert the analog signal output from the analog mid-width unit 220 into a digital signal.

According to one side, the analog-to-digital conversion unit 230 includes a first sampling module and a second sampling module including a MOS switch, a sampling capacitor, and an operational amplifier, and the first sampling module and the second sampling module are alternately It is possible to perform sampling of the amplified bio-signal through the operating double sampling operation.

More specifically, in the analog-to-digital conversion unit 230, the first sampling module is operated during the half period of the amplified biosignal to sample the biosignal while the second sampling module maintains a hold state, and the other half period While the first sampling module is held while the second sampling module is controlled to perform a sampling operation, it is possible to finely adjust the sampling of the amplified bio-signal, thereby improving the bit resolution for the dynamic range. can make it

The controller 240 according to an embodiment detects a change in the user environment based on the digitized biosignal, generates a feedback signal corresponding to the sensed change in the environment, and generates an analog analog signal based on the generated feedback signal. A gain of the amplifier 220 may be controlled. In other words, the control unit 240 may compensate and automatically adjust the size of the biosignal according to the use environment (ie, external conditions).

For example, the change in the use environment may include at least one of a change in the user's posture and a change in the user's bio-signal measurement site (ie, the position of the bio-signal detection sensor). In addition, when the bio-signal monitoring device 200 is a bed-type bio-signal monitoring device, the use environment change may include at least one of a change in a bed mattress material and a change in the position of a bio-signal detection sensor on the mattress.

In addition, the control unit 240 may be implemented as a digital circuit including a micro controller unit (MCU) or an application processor (AP) incorporating software for compensating the size of a biosignal according to a use environment.

Specifically, the control unit 240 may increase the amplification factor (gain) of the analog amplification unit 220 and control only a desired frequency range to pass through. Therefore, the control unit 240 can maintain the same frequency passband while adjusting the amplification rate of the biosignal according to the use environment, and conversely, can obtain the same amplification rate while changing the frequency range.

More specifically, the control unit 240 monitors the amplitude of the digitized biosignal, and if the monitored amplitude changes by more than a predetermined threshold value during a predetermined detection time, it is determined that the use environment has changed and a feedback signal is generated. can create

For example, the control unit 240, when the magnitude of the digitized bio-signal changes to more than a predetermined threshold value (ie, the first threshold range) for a first predetermined detection time (eg, 1 second), uses It is determined that there is a possibility of change in the environment, and the digitized bio-signal is monitored for a second detection time (eg, 10 seconds). If the size of the digitized bio-signal is maintained within the second critical range during the monitoring process, It is determined that the use environment has changed, and a feedback signal corresponding to the change may be generated.

According to one side, the control unit 240 may control the amplification rate of the analog amplifier 220 through control of the switching element based on the generated feedback signal. In other words, the feedback signal generated through the controller 240 may be a switching control signal for controlling on/off of each of the switching elements included in the analog amplifier 220 .

Also, the controller 240 may generate a feedback signal based on a pre-stored lookup table.

Specifically, the control unit 240 may store switching control values corresponding to the characteristics of each different posture of the user and the characteristics of each position of the bio-signal detection sensor in advance in the form of a look-up table, and from the analog-to-digital conversion unit 230 The received digitized biosignal is matched with a look-up table to extract a corresponding switching control value, and controls on/off of each switching element provided in the analog amplifier 220 in response to the extracted switching control value can do.

On the other hand, if the control unit 240 determines that the usage environment has not changed, the result calculating unit 250 may output a biosignal measurement result corresponding to the converted digital signal.

According to one side, the result calculation unit 250 may output a measurement result corresponding to a bio signal whose amplification rate is controlled by the control unit 240 and output from the analog amplification unit whose amplification rate is controlled.

3 is a diagram for explaining an example of an analog amplifying unit included in a bio-signal monitoring device according to an embodiment.

Referring to FIG. 3 , the analog amplification unit 300 may amplify biosignals collected from a biosignal collector included in the biosignal monitoring device.

To this end, the analog amplifier 300 includes a plurality of resistors and a plurality of capacitors 310 connected in parallel between an input terminal and an output terminal, and a switching element 320 connected to the plurality of resistors and the plurality of capacitors 310, respectively. ) may be included.

On the other hand, the analog amplification unit 300 controls the on/off operation of each switching element 320 based on the feedback signal received from the control unit provided in the bio-signal monitoring device, so that the analog amplification unit 300 ) can be adjusted.

4 is a diagram for explaining a bio-signal monitoring device according to another embodiment.

In other words, the bio-signal monitoring device described with reference to FIG. 4 is a diagram for explaining another embodiment of the bio-signal monitoring device according to the embodiment described with reference to FIGS. Descriptions overlapping those described through the bio-signal monitoring device according to the example will be omitted.

Referring to FIG. 4 , the bio-signal monitoring apparatus 400 according to another embodiment may more accurately calculate the user's heart rate and respiratory rate per minute.

In addition, the bio-signal monitoring device 400 can improve the accuracy of bio-signal measurement by compensating for the bio-signal in response to changes in the use environment.

To this end, the bio-signal monitoring device 400 may include a bio-signal collection unit 410, a signal processing unit 420, and a result calculating unit 430, and the bio-signal monitoring device 400 is a smart bed (or smart bed). It may be provided at a position corresponding to at least one of the frame of the mattress) and the mattress (M).

The biosignal collection unit 410 according to another embodiment may collect a ballistocardiogram (BCG) signal of the user by using a biosignal detection sensor provided in the bed.

The signal processing unit 420 according to another embodiment may generate an amplified ballistic signal based on the collected ballistic signal and digitize the amplified ballistic signal.

According to another embodiment, the result calculation unit 430 may calculate a bio signal measurement result of at least one of the user's heart rate per minute and respiratory rate based on the ballistic signal digitized through the signal processing unit 420 .

A more detailed description of the bio-signal monitoring device 400 according to another embodiment will be described later in detail with reference to FIG. 5 of the embodiment.

5 is a diagram for explaining a bio-signal monitoring device according to another embodiment in more detail.

Referring to FIG. 5 , a bio-signal monitoring device 500 according to another embodiment includes a bio-signal collection unit 510, a noise removal unit 520, a signal processing unit 530, a control unit 540, and a wavelet transform unit 550. ), a result calculation unit 560 and an alarm unit 570 may be included.

In addition, the signal processing unit 530 may further include an analog amplifier 531 and an analog-to-digital converter 532 .

Meanwhile, the bio-signal collection unit 510, the analog amplification unit 531, the analog-to-digital conversion unit 532, the control unit 540, and the result calculation unit 560 described below monitor bio-signals according to an embodiment. It may be a bio-signal collection unit, an analog amplification unit, an analog-to-digital conversion unit, a control unit, and a result calculation unit provided in the device.

The bio-signal collection unit 510 according to another embodiment may collect a user's heart trajectory signal using a bio-signal detection sensor provided in the bed.

According to one side, the bio-signal collection unit 510 uses at least one bio-signal detection sensor of a piezoelectric film and a piezoelectric sensor to obtain a trajectory signal and a user's respiratory signal (respiratory, RR). can be collected For example, the piezoelectric film may be a film based on a piezoelectric PVDF polymer.

The noise controller 520 according to another embodiment uses at least one of a band pass filter (BPS) and a notch filter, and the collected signals are collected through the biosignal collector 510. Noise components can be removed from the ballistic signal.

The signal processor 530 according to another embodiment may generate an amplified ballistic signal based on the ballistic signal from which noise components have been removed, and digitize the amplified ballistic signal.

Specifically, the analog amplification unit 531 of the signal processing unit 530 may amplify the ballistic signal from which noise components have been removed, and the analog-to-digital conversion unit 532 may digitize the amplified ballistic signal.

The control unit 540 according to another embodiment detects a change in the user's use environment based on the digitized heart trajectory signal, compensates for the digitized heart ballistic signal based on the detected change in the use environment, and compensates for the compensated heart trajectory. The signal may be transmitted to the wavelet transform unit 550.

For example, the change in the use environment may include at least one of a change in the material of a bed mattress and a change in the position of a biosignal sensor on the mattress.

Specifically, when it is determined that the use environment has changed, the control unit 540 generates a feedback signal for controlling the gain of the analog amplification unit 531, and sends the generated feedback signal to the analog amplification unit 531. can provide

In other words, the control unit 540 may output a compensated ballistic signal corresponding to the feedback signal of which the amplification rate output from the analog amplifier 531 is controlled.

According to one side, the controller 540 may generate a feedback signal based on a pre-stored lookup table.

For example, the control unit 540 may store switching control values corresponding to the characteristics of each material of the bed mattress and the characteristics of each position of the biosignal detection sensor on the mattress in advance in the form of a lookup table, and the analog-to-digital conversion unit 532 ) Match the digitized ballistic signal received from the lookup table to extract a corresponding switching control value, and control the amplification rate of the analog-to-digital conversion unit 532 in response to the extracted switching control value. there is.

According to one side, the control unit 540 may transmit the digitized seam trajectory signal to the wavelet transform unit 550 when it is determined that the usage environment has not changed.

The wavelet transform unit 550 according to another embodiment may wavelet transform the compensated ballistic signal or the digitized ballistic signal received from the control unit 540 to convert the signal into a signal according to a variable time-frequency domain.

According to another embodiment, the result calculation unit 560 may calculate a bio signal measurement result of at least one of the user's heart rate and respiratory rate per minute based on the heart trajectory signal wavelet-transformed by the wavelet transform unit 550.

According to one side, the result calculation unit 560 may calculate at least one bio-signal measurement result based on the peak and shape of the wavelet-transformed heart ballistic signal.

For example, the result calculating unit 560 may detect a peak value maintained at a maximum value during a detection time in the wavelet-transformed heart ballistic signal as a heart rate peak value, and calculate the user's heart rate per minute based on the detected heart rate peak value. there is.

In addition, the result calculation unit 560 may monitor the respiratory signal collected from the biosignal collection unit 510 to calculate the number of breaths per minute.

The alarm unit 570 according to another embodiment may output an alarm signal when the physiological signal measurement result calculated through the result calculation unit 560 exceeds a preset threshold range. In other words, if it is determined that there is an abnormality in the user's heartbeat or respiration, the alarm unit 570 may provide an alarm through an alarm.

According to one side, the alarm unit 570 may be provided in an external device separately from the bio-signal monitoring device 500, and in this case, the alarm unit 570 is selected from Bluetooth, Wi-Fi, and USB. A bio-signal measurement result may be received through at least one communication means.

In addition, the alarm unit 570 may provide an alarm to at least one of a preset user terminal and an administrator terminal, where the terminal may include at least one of a PC and a smart device.

6 is a diagram for explaining an operating method of a bio-signal monitoring device according to an embodiment.

In other words, FIG. 6 is a diagram for explaining an operating method of the bio-signal monitoring device according to the embodiment described above with reference to FIGS. 2 and 3 . A description overlapping with the description will be omitted.

Referring to FIG. 6 , in step 610 of the operating method of the bio-signal monitoring apparatus according to an embodiment, the bio-signal collection unit may collect bio-signals of the user.

Next, in step 620, the operating method of the bio-signal monitoring device according to an embodiment may amplify the bio-signal collected by the analog amplifying unit.

The analog amplifier according to an embodiment may include at least one resistor, at least one capacitor, and a switching element connected to the resistor and the capacitor, respectively.

Next, in step 630, the bio-signal amplified by the analog-to-digital conversion unit may be digitized in the operating method of the bio-signal monitoring device according to the embodiment.

Next, in step 640, the operating method of the bio-signal monitoring device according to an embodiment detects a change in the user's use environment based on the digitized bio-signal, generates a feedback signal corresponding to the detected change in the use environment, , It is possible to control the gain of the analog amplification unit based on the generated feedback signal.

For example, the change in the use environment may include at least one of a change in the user's posture and a change in the user's bio-signal measurement site (ie, the position of the bio-signal detection sensor).

According to one side, in step 640, the operating method of the biological signal monitoring device according to an embodiment may control the amplification rate of the analog amplification unit through control of the switching element based on the feedback signal generated by the control unit.

In addition, in step 640, in the operating method of the biological signal monitoring apparatus according to an embodiment, the control unit may generate a feedback signal based on a pre-stored lookup table.

According to one side, in step 640, the operating method of the bio-signal monitoring device according to an embodiment monitors the amplitude of the digital signal converted by the controller so that the monitored amplitude changes by more than a preset threshold during a preset detection time. If so, it is determined that the use environment has changed and a feedback signal can be generated.

Meanwhile, in step 640, in the operating method of the bio-signal monitoring device according to an embodiment, if the control unit determines that the use environment has not changed, the result calculation unit can output a bio-signal measurement result corresponding to the converted digital signal. .

According to one side, in step 640, the operating method of the bio-signal monitoring device according to an embodiment is a measurement result corresponding to the bio-signal whose amplification rate is controlled and output from the analog amplification unit whose amplification rate is controlled through the control unit in the result calculation unit. can output

7 is a diagram for explaining an operating method of a bio-signal monitoring device according to another embodiment.

In other words, FIG. 7 is a diagram for explaining an operating method of the bio-signal monitoring device according to another embodiment described above with reference to FIGS. 4 and 5 . A description overlapping with the description will be omitted.

Referring to FIG. 7 , in the operating method of the bio-signal monitoring device according to another embodiment in step 710, the bio-signal collection unit uses a bio-signal detection sensor provided on the bed to detect a user's ballistocardiogram (BCG) signal. can be collected

Next, in step 720, the operating method of the bio-signal monitoring device according to another embodiment may generate an amplified ballistic signal based on the ballistic signal collected by the signal processing unit, and digitize the amplified ballistic signal.

According to one side, in step 720, the operating method of the bio-signal monitoring apparatus according to another embodiment uses at least one filter of a frequency band pass filter (BPS) and a notch filter in the noise control unit. A noise component may be removed from the collected ballistic signal, and the ballistic signal from which the noise component is removed may be provided to the signal processing unit.

According to one side, in step 720, in the operating method of the bio-signal monitoring device according to another embodiment, the signal processor generates an amplified ballistic signal based on the ballistic signal from which noise components have been removed, and digitizes the amplified ballistic signal. can do.

In addition, in step 720, the operating method of the bio-signal monitoring apparatus according to another embodiment may wavelet transform the digitized heart trajectory signal in the wavelet transform unit and convert it into a signal according to a variable time-frequency domain.

Specifically, in step 720, in the method of operating the bio-signal monitoring device according to another embodiment, the analog amplification unit provided in the signal processing unit can amplify the ballistic signal from which noise components are removed, and then the analog- The ballistic signal amplified by the digital converter may be digitized.

In addition, in step 720, in the operating method of the bio-signal monitoring device according to another embodiment, the control unit detects a change in the user's use environment based on the digitized heart ballistic signal, and the digitized heart based on the detected change in the use environment. The ballistic signal may be compensated for, and the compensated ballistic signal may be transmitted to the wavelet transform unit.

In addition, in step 720, in the operating method of the bio-signal monitoring apparatus according to another embodiment, the wavelet transform unit may perform wavelet-transformation of the compensated seam trajectory signal.

For example, the change in the use environment may include at least one of a change in the material of a bed mattress and a change in the position of a biosignal sensor on the mattress.

More specifically, in the operating method of the bio-signal monitoring device according to another embodiment in step 720, if it is determined that the use environment has changed in the control unit, a feedback signal is generated to control the gain of the analog amplification unit, and the generated feedback signal is generated. By providing the feedback signal to the analog amplifying unit, a compensated ballistic signal corresponding to the feedback signal having an amplification rate output from the analog amplifying unit may be output.

According to one side, in step 720 of the operating method of the biological signal monitoring device according to another embodiment, the control unit may generate a feedback signal based on a pre-stored lookup table.

Next, in step 730, in the operating method of the bio-signal monitoring device according to another embodiment, the result calculating unit may calculate at least one bio-signal measurement result of the user's heart rate and respiratory rate per minute based on the digitized ballistic signal. there is.

According to one side, in step 730, in the operating method of the bio-signal monitoring device according to another embodiment, the result calculation unit calculates at least one bio-signal measurement result based on the peak and shape of the wavelet-transformed ballistic signal. can do.

According to one side, in step 730, in the operating method of the bio-signal monitoring device according to another embodiment, an alarm signal may be output when the bio-signal measurement result calculated by the alarm unit exceeds a predetermined threshold range.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

200: bio-signal monitoring device 210: bio-signal collection unit
220: analog amplification unit 230: analog-to-digital conversion unit
240: control unit 250: result calculation unit

Claims (11)

a bio-signal collecting unit that collects a user's bio-signal;
an analog amplifier including at least one resistor, at least one capacitor, and a switching element connected to the resistor and the capacitor, respectively, and amplifying the collected biosignal;
An analog-to-digital conversion unit for digitizing the amplified bio-signal; and
Based on the digitized biosignal, a change in the user's use environment is detected, a feedback signal corresponding to the sensed change in the use environment is generated, and an amplification rate of the analog amplification unit based on the generated feedback signal ( control unit that controls the gain
Bio-signal monitoring device comprising a. According to claim 1,
The analog amplification unit,
Including the resistor and the capacitor connected in parallel to each other between an input terminal and an output terminal
Vital signal monitoring device. According to claim 1,
The control unit,
Controlling the amplification rate of the analog amplifier through control of the switching element based on the generated feedback signal
Vital signal monitoring device. According to claim 1,
The control unit,
Generating the feedback signal based on a pre-stored lookup table
Vital signal monitoring device. According to claim 1,
The control unit,
Monitoring the amplitude of the digitized biosignal, and determining that the use environment has changed when the monitored amplitude changes by more than a predetermined threshold value during a predetermined detection time and generating the feedback signal
Vital signal monitoring device. According to claim 5,
Further comprising a result calculation unit for outputting a biosignal measurement result corresponding to the converted digital signal when the control unit determines that the use environment has not changed.
Vital signal monitoring device. According to claim 1,
Embedded in at least one of a bed and a mattress of the bed
Vital signal monitoring device. Collecting the user's bio-signals in a bio-signal collection unit;
amplifying the collected bio-signals in an analog amplifier;
Digitalizing the amplified biosignal in an analog-to-digital conversion unit; and
A control unit detects a change in the user environment based on the digitized biosignal, generates a feedback signal corresponding to the sensed change in the use environment, and based on the generated feedback signal, the analog amplifying unit Controlling the gain
including,
The analog amplification unit,
At least one resistor, at least one capacitor, and a switching element connected to the resistor and the capacitor, respectively
Operating method of bio-signal monitoring device. According to claim 8,
In the step of controlling the amplification rate,
In the control unit, controlling the amplification rate of the analog amplification unit through control of the switching element based on the generated feedback signal
Operating method of bio-signal monitoring device. According to claim 8,
In the step of controlling the amplification rate,
In the controller, generating the feedback signal based on a pre-stored lookup table
Operating method of bio-signal monitoring device. According to claim 8,
In the step of controlling the amplification rate,
The control unit monitors the amplitude of the converted digital signal, determines that the use environment has changed, and generates the feedback signal when the monitored amplitude changes by more than a predetermined threshold value during a predetermined detection time.
Operating method of bio-signal monitoring device.

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