KR20200043741A - Infant bio device with embedded temperatur sensor and threshold control method for signal stabilization - Google Patents

Abstract

Disclosed is an infant safety monitoring device based on a motion threshold control. According to an embodiment of the present invention, the infant safety monitoring device worn on an infant includes: an SpO2 sensor for measuring a pulse wave of the infant; an acceleration sensor for detecting a movement of the infant; a temperature sensor for detecting a body temperature of the infant; and an MCU for detecting SpO2 and a pulse rate from a signal measured by the SpO2 sensor, detecting a supine position or a prone position of the infant from a signal measured by the acceleration sensor, and detecting the body temperature of the infant from a signal measured by the temperature sensor, wherein the temperature sensor and the SpO2 sensor are disposed in a structure determined based on measurement accuracy, and measure a body temperature and a pulse wave of the infant′s foot.

Description

Infant and body built-in biological device and threshold control method for signal stabilization {INFANT BIO DEVICE WITH EMBEDDED TEMPERATUR SENSOR AND THRESHOLD CONTROL METHOD FOR SIGNAL STABILIZATION}

The present invention relates to a biological device for infants and toddlers, and more specifically, it can be worn on an infant or toddler and measures the oxygen saturation (SpO2) or pulse rate of the infant by adaptively adjusting a movement threshold to measure the infant's safety. It relates to a biological device.

Various studies for the safety management of infants and toddlers are being conducted at home and in foster care facilities.

In the prior art, a safety management system for infants and toddlers has been researched and widely used to attach or pay tags stored with personal information and guardian information to infants and toddlers, and periodically notify guardians whether infants are present in a protected area through a reader unit. have.

However, the safety management system for infants and toddlers using the conventional tag is made by a method in which the guardian is simply passively transmitting whether or not the infant is located in the protected area, so the guardian cannot accurately recognize the current state of the infant and the infant There is a limitation that it is not possible to recognize an unexpected situation and cannot perform an immediate response to the unexpected situation.

SUMMARY Embodiments of the present invention provide an infant / child biological device for monitoring the safety of an infant or toddler by measuring oxygen saturation (SpO2) or pulse rate of the infant or toddler by adaptively adjusting a movement threshold and being wearable on an infant or toddler.

Embodiments of the present invention, by placing the SpO2 sensor and the temperature sensor in a structure arrangement determined in consideration of measurement accuracy, provides an infant and toddler biological device capable of improving the detection accuracy for SpO2, pulse rate and body temperature in infants and toddlers.

Embodiments of the present invention detects the state of lying down or lying down in an infant, and adjusts the movement threshold according to the lying down state, so that when the patient is in the lying down state, the oxygen saturation (SpO2) of the infant or toddler Provided is an infant / child biological device capable of preventing sudden infant death by measuring pulse rate.

An infant safety monitoring device according to an embodiment of the present invention includes: an infant safety monitoring device worn on an infant, a SpO2 sensor for measuring pulse wave of the infant; An acceleration sensor for detecting movement of the infant and toddler; A temperature sensor for detecting the body temperature of the infant or toddler; And detecting SpO2 and pulse rate from the measurement signal by the SpO2 sensor, detecting the supine or prone position of the infant from the measurement signal by the acceleration sensor, and from the measurement signal by the temperature sensor. It includes an MCU for detecting the body temperature of the infant, the temperature sensor and the SpO2 sensor is arranged in a structure determined in consideration of the measurement accuracy, characterized in that to perform body temperature and pulse wave measurement for the foot portion of the infant and the infant .

The temperature sensor is formed on a PCB, and a liquid heat transfer material and a silver (Ag) electrode are sequentially formed on the temperature sensor, so that the silver electrode directly contacts the infant to detect body temperature of the infant. .

Furthermore, the safety monitoring device for infants and toddlers according to an embodiment of the present invention further includes a first temperature sensor for detecting the external temperature of the infant, and the MCU controls the movement of the infant in consideration of the body temperature and the external temperature of the infant. The threshold is set differently, and SpO2 and pulse rate can be detected from the measurement signal by the SpO2 sensor based on the set threshold.

The MCU may set a threshold of the movement differently based on the detected posture of the infant, and detect SpO2 and pulse rate from the measurement signal by the SpO2 sensor based on the set threshold.

The MCU may set the threshold of the movement differently based on the detected body temperature of the infant, and may detect SpO2 and pulse rate from the measurement signal by the SpO2 sensor based on the set threshold.

According to embodiments of the present invention, the infant's safety can be monitored by measuring the oxygen saturation (SpO2) or the pulse rate of the infant by adaptively adjusting a movement threshold and wearing the infant.

According to embodiments of the present invention, the SpO2 sensor and the temperature sensor are disposed in a structure arrangement determined in consideration of measurement accuracy, thereby improving the detection accuracy of SpO2, pulse rate, and body temperature in infants and toddlers.

Embodiments of the present invention detects the state of lying down or lying down in an infant, and adjusts the movement threshold according to the lying down state, so that when the patient is in the lying down state, the oxygen saturation (SpO2) of the infant or toddler By measuring the pulse rate, sudden infant death can be prevented.

1 shows an exemplary view for explaining an infant safety monitoring device of the present invention.
FIG. 2 shows a configuration for the safety monitoring device for infants and toddlers illustrated in FIG. 1.
FIG. 3 is a flowchart illustrating an operation for an infant safety monitoring process using the infant safety monitoring device illustrated in FIG. 1.
4 is a flowchart illustrating an operation of an embodiment of step S230 of FIG. 3.
5 is a flowchart illustrating an operation of an embodiment of step S240 of FIG. 3.
6 is a flowchart illustrating an operation of an embodiment of step S250 of FIG. 3.
7 illustrates an exemplary diagram for explaining the structure arrangement of a SpO2 sensor and a temperature sensor in an infant safety monitoring device.
8 shows an exemplary view of a transducer structure of a temperature sensor.
9 shows exemplary views to which the infant safety monitoring device of the present invention is applied.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person having the scope of the invention, and the present invention is only defined by the scope of the claims.

The terminology used herein is for describing the embodiments, and is not intended to limit the present invention. In this specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, “comprises” and / or “comprising” refers to the components, steps, operations, and / or elements mentioned above of one or more other components, steps, operations, and / or elements. Presence or addition is not excluded.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by those skilled in the art to which the present invention pertains. In addition, commonly used terms defined in the dictionary are not ideally or excessively interpreted unless specifically defined.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted.

In the embodiments of the present invention, when the movement value of an infant detected using a wearable device is smaller than a controllable movement threshold, the safety of the infant is measured by measuring the oxygen saturation (SpO2) or pulse rate of the infant through a signal stabilization process. The main thing is to monitor.

Here, the present invention detects an immediate lying down state or a lying down state of an infant, and adjusts a movement threshold according to the lying down state, and when in the lying down state by adjusting a movement threshold, the oxygen saturation (SpO2) value or pulse rate of the infant or toddler The value can be measured.

Furthermore, the present invention may set the threshold of movement differently by reflecting the oxygen saturation (SpO2) value or pulse rate measured before a certain time, or may set the threshold of movement differently based on the body temperature of an infant or toddler.

Furthermore, according to the present invention, SpO2 sensors and temperature sensors are arranged in a structure arrangement determined in consideration of measurement accuracy, thereby improving the detection accuracy of SpO2, pulse rate, and body temperature in infants and toddlers.

That is, according to the present invention, the threshold of movement for calculating the oxygen saturation (SpO2) value or the pulse rate value of an infant is set differently according to circumstances, and the SpO2 sensor and the temperature sensor are arranged in a structure arrangement determined in consideration of measurement accuracy, Even if the movement of infants and toddlers is large depending on the situation, it is possible to measure the oxygen saturation value or pulse rate value by raising the threshold when it is determined to be a dangerous situation, and it can prevent the sudden death of infants and toddlers.

The present invention will be described with reference to FIGS. 1 to 8 as follows.

1 shows an exemplary view for explaining an infant safety monitoring device of the present invention, and FIG. 2 shows a configuration for an infant safety monitoring device shown in FIG. 1. Here, the infant and child safety monitoring apparatus 100 shown in FIG. 1 corresponds to a biological device for infants and toddlers, and may incorporate a body temperature device. The body temperature device may be the built-in temperature sensor 190 shown in FIG. 2.

1 and 2, the infant safety monitoring device 100 is a constant current LED switching for driving the LED of the IR / Red LED, photo diode integrated SpO2 sensor 110, SpO2 sensor 110 for pulse wave measurement Unit 120, temperature sensor 190 for detecting body temperature in infants, I / V converter 130 for changing sensor output current to voltage, Bluetooth module 140 for Bluetooth communication, power supply unit 150 and MCU 160 is composed of the main components.

In addition, the band-type infant safety monitoring device 100 uses a 3-axis acceleration sensor 170 for measuring posture, and the user interface 180 is a power on / off switch 181, a connection state of Bluetooth communication and a battery It is composed of LEDs (182, 183) indicating the state of charge. The power is driven by the battery 151, so that the battery can be charged through the micro USB connector 152.

Meanwhile, when the pulse wave measuring unit of the band-type infant safety monitoring device 100 according to the present invention is described, a SpO2 sensor (IR / Red LED, photo diode integrated type) 110 is used as the pulse wave measuring unit. The sensor of the pulse wave measurement unit may use an integrated sensor in which a light emitting (IR / Red LED) element and a photo-diode sensor are packaged for reflective measurement.

The constant current LED switching unit 120 flows about 20mA of current through the constant current control to the light emitting element, and controls switching by three steps (IR LED On → Red LED On → All LED Off) in one cycle. The duty ratio of each stage is 1/3 and the switching frequency is about 300 Hz. The light receiving sensor of the SpO2 sensor 110 generates a current signal in proportion to the amount of incident light. The current output signal of the SpO2 sensor 110 is converted into a voltage signal through the current-voltage converter (I / V converter) 130 and then transmitted to the 16-bit ADC 161 of the MCU 160. The ADC 161 is driven at a constant sampling rate, for example, a sampling rate of 50 kSPS.

The MCU 160 may calculate a posture after obtaining a rotation angle by using a gravitational acceleration direction projected on each axis of the 3-axis acceleration sensor 170. The posture can detect supine and prone immediately, and the 3-axis acceleration sensor 170 is expressed at a resolution of 256 levels per 1g. The communication method uses I2C.

The MCU 160 has a 16-bit ADC 161 for miniaturization. The MCU 160 performs not only communication control, but also calculation functions of posture, SpO2, and HR. The calculation of SpO2 value should detect both AC / DC values of the IR / Red signal, and the DC component is very large compared to the AC component, and the IR signal must be larger than the Red signal. In the device to which the 16-bit ADC 161 is applied, the AC component of the red signal varies depending on the person, but when measured on the finger, it has a value of about 200 levels. If a 12-bit quantization rate ADC is applied, the resolution is greatly reduced to a level of about 13, and the 16-bit ADC 161 is adopted because it is determined to cause problems in SpO2 calculation.

The Bluetooth module 140 is adopted for communication with a guardian terminal such as a smartphone, and is a small module that integrates an FW, an RF unit, an antenna, and the like. The Bluetooth module 140 communicates with the MCU 160 using UART 961200 bps, and has a built-in V2.0 stack for Bluetooth communication.

The power supply unit 150 includes a charging unit for charging a lithium polymer battery and a constant voltage power supply. The constant voltage for driving the Bluetooth module 140, the MCU 160, etc. in the power supply unit 150 is implemented using TCR2EF30, and the external power supply uses the micro USB connector 152 in consideration of convenience and miniaturization. Adopt. The charging current of the power supply unit 150 is set to about 200 mA, and the battery 151 is designed to be usable for 4 hours or more with a capacity of 430 mAh.

Meanwhile, the user interface 180 includes a power on / off switch 181 and two LEDs 182 and 183 for transmitting information to the user. Power On / Off switch 181 Turns on when pressed for more than 1 second, and turns off when pressed for more than 1 second. The two LEDs 182 and 183 are composed of a charging LED 183 indicating a charging state when charging the battery 151 and a connection LED 182 indicating a Bluetooth connection state. The charging LED 183 repeatedly turns on 0.2 seconds and turns off 1 second when it is being charged, and turns on continuously when charging is completed, and repeats turning on 0.1 seconds and turning off 0.1 seconds when a charging error occurs. The connection LED 182 repeatedly turns on for 0.2 seconds and turns off for 1 second in the connection standby state, and continues to light when connected.

The temperature sensor 190 directly contacts the body part of an infant, for example, a foot, and directly detects the infant's body temperature. Here, the temperature sensor 190 can directly reduce the measurement error by directly contacting the infant's body through silver metal and detecting body temperature using heat transferred through the silver metal.

The MCU 160 basically processes SpO2 and pulse rate detection, body temperature detection, posture detection, communication execution, and user interface functions. The MCU 160 extracts AC / DC components of the signal by applying a digital LPF for noise reduction and QV algorithm for baseline detection in the process of detecting SpO2 and pulse rate.

Here, the pulse rate is detected using the maximum detection method of the window method, and the posture is inferred by detecting the rotation angle and movement of the 3-axis acceleration sensor 170. Since the Bluetooth module 140 is controlled through the UART, communication with a PC is implemented by controlling the UART port through DMA.

Furthermore, the MCU 160 sets the movement threshold of infants and toddlers to calculate SpO2 and pulse rate values based on the detected posture, or sets the movement threshold of infants and toddlers based on body temperature of infants and toddlers, or recently calculated SpO2 and pulse rate values may be reflected to set the movement threshold of infants and children differently. Additionally, the MCU 160 may further set the movement threshold of infants and toddlers by differently reflecting the external temperature detected by the additional temperature sensor when the device 100 is equipped with an additional temperature sensor that detects the infant's external temperature. .

That is, the MCU 160 does not set the threshold of movement as a fixed value for measuring the oxygen saturation value or pulse rate value of the toddler based on the movement of the infant, but sets the threshold differently according to the situation. .

For example, the MCU 160 sets a reference threshold value, for example, 2 Hz, which is a reference value for the movement threshold when the posture of the infant is determined to be in a state of reclining based on the value sensed by the 3-axis acceleration sensor. If the posture is determined to be lying on the stomach, the threshold of the movement is set to a threshold higher than the reference threshold, for example, 3 Hz or 4 Hz, so that problems of infants and toddlers that may occur while lying on the stomach can be prevented in advance.

As another example, when the recently calculated oxygen saturation value or pulse rate value is in a normal state, the MCU 160 sets a threshold as a reference threshold value, and when it is close to a risk, sets the threshold as a threshold higher than the reference threshold and higher as the threshold By doing so, it is possible to monitor the situation that may be caused by the infant's risk.

FIG. 3 illustrates an operation flowchart for an infant safety monitoring process using the infant safety monitoring device illustrated in FIG. 1, and shows an operation flowchart in the MCU of FIG. 2.

Referring to FIG. 3, the infant safety monitoring device detects the movement of an infant using the device 100 attached to the infant, and sets a measurement threshold, that is, a movement threshold based on the detected motion or posture of the infant ( S210, S220).

Here, step S210 may detect the movement of the infant or toddler using the 3-axis acceleration sensor provided in the device 100, for example, the posture of the infant, based on the value of each axis sensed by the 3-axis acceleration sensor, for example, It is possible to detect posture information about a lying down position, a lying down position and the like.

At this time, in setting the threshold of movement, step S220 may be set differently in consideration of the infant's posture, or may be set differently based on the detected body temperature when the infant's body temperature is detected. It may be set differently by reflecting the oxygen saturation value of.

As described above, the present invention can measure the oxygen saturation value for various cases that may occur in infants and toddlers by setting the threshold of movement to an adjustable value rather than a fixed value, and provides a result value according to each situation to a guardian Doing so can prevent dangerous situations in advance.

If the threshold is set in step S220, the set threshold is compared with the motion value calculated by motion detection to pass the measurement if the motion value is greater than the set threshold value, and if the motion value is less than the threshold value, SpO2 through the signal stabilization process After removing the noise from the data obtained by the sensor, it is determined whether the SpO2 value or the pulse rate value calculated by the data from which the noise is removed is valid, or measurement is performed (S240, S250).

A detailed description of each step of FIG. 3 will be described with reference to FIGS. 4 to 6 as follows.

FIG. 4 is a flowchart illustrating an operation of one embodiment of step S230 of FIG. 3, and shows an operation flowchart for determining SpO2 and pulse rate measurement states.

As illustrated in FIG. 4, the maximum (Max), minimum (Min), and average values of each axis at a given time using acceleration data detected by a 3-axis acceleration sensor, that is, X-axis data, Y-axis data, and Z-axis data. After calculating, the maximum acceleration change amount (A) of the 3-axis acceleration sensor is calculated using the difference between the maximum value and the minimum value.

If the calculated maximum acceleration change amount is a preset measurement reference value (or threshold), for example, 2 Hz or more, it is determined as a motion state and is not measured. If it is determined that it is less than 2 Hz, SpO2 and pulse rate are measured.

Of course, based on the acceleration data detected by the 3-axis acceleration sensor, it is possible to determine whether an infant or toddler wearing the device is lying down or lying upside down. For example, when a 3-axis acceleration sensor is attached to the upper thigh, when the device is attached, the Y-axis of the 3-axis acceleration sensor indicates the long axis direction of the thigh, and if the leg is placed horizontally on the floor, the Y-axis value is 0, The value of the X-axis is 0, and the value of the Z-axis is 1 g. Therefore, when the legs are rotated in the long axis direction (axis perpendicular to gravity) in a state horizontal to the floor, the rotation angle can be known according to the values of the X and Z axes. There is no big problem in calculating the rotation angle even if the legs are raised or lowered in a horizontal state on the floor, but if it is raised a lot, a problem arises in the calculation of the rotation angle, and it enters the uncalculated state. When the leg is raised or lowered in a horizontal state on the floor, the value of the Y axis increases or decreases from 0, and it is detected whether measurement is possible or impossible based on a preset measurement reference value.

If there is no movement and the legs are not raised, it is judged whether they are lying down or lying upside down through the rotation angle. For example, it can be judged based on an angle of 180 degrees, but a hysteresis of 10 degrees is placed based on the current posture so that the display of the posture is stably displayed even when slightly moved near 0 and 180 degrees.

FIG. 5 is a flowchart illustrating an operation of one embodiment of step S240 of FIG. 3, and shows an operation flowchart of stabilizing a signal through a process of SpO2 and pulse rate calculation.

As shown in FIG. 5, by switching the LEDs in the order of IR LED On / Red LED On / All LED Off in the SpO2 sensor, the output signal of the generated SpO2 sensor is acquired through the built-in ADC at a sampling rate of 10 kSPS. . And to remove noise, by performing a moving average (moving average) to a certain sample size, the IR signal is extracted, by passing through the LPF for each signal to further remove high-frequency noise, and then down to a certain frequency, for example, 30Hz Sample.

For example, because the LED of the SpO2 sensor switches to about 300 Hz, it can be synchronized with the switching cycle for three states: IR LED on the down-sampled data, red LED on, and all LED off. IR signal waveforms can be extracted.

For the down sampled signal, two quadratic variation output signals are extracted using a quadratic variation (QV) algorithm, and two triangular wave coefficients are extracted using the extracted two quadratic variation output signals.

The signal is extracted by multiplying each extracted triangular wave coefficient and the QV signal, and by adding the two extracted signals, an optimal pulse wave signal with a stable signal is extracted.

Furthermore, the pulse rate is calculated after extracting the change amount component (AC component) of the data and performing peak detection, obtaining the time (number of samples) between each maximum value.

The AC component for pulse rate calculation can be extracted by removing the baseline change component from the signal of 300 SPS. Baseline can be detected by applying QV algorithm. The QV algorithm, which is processed in units of 5 seconds, is implemented through a square matrix, and data can be downsampled to apply the QV algorithm because a large amount of computation is required to obtain a result. After downsampling, the baseline is detected through the QV algorithm, linear interpolation can be performed, and there is a time difference between the baseline acquired through the QV algorithm and the linear interpolation and the signal passing through the LPF. Compensate ingredients. Since the baseline result by the QV algorithm has a problem that discontinuities occur in each calculation section, a dual weight QV (Weighted Dual QV) algorithm may be used to solve the problem.

Meanwhile, the SpO2 value may be calculated through the IR and Red signals of the SpO2 sensor, and the baseline to which the QV algorithm is applied is a DC component, and the value obtained by subtracting the baseline value from the signal value is an AC component.

FIG. 6 is a flowchart illustrating an operation of one embodiment of step S250 in FIG. 3, and shows an operation flowchart for determining whether the calculated SpO2 value and pulse rate value are valid.

As shown in FIG. 6, SpO2 is normally measured only when the SpO2 sensor and the measurement object are close. If the distance between the SpO2 sensor and the measurement object is far, it is meaningless to calculate the SpO2 and the pulse rate, so a method of determining whether the calculated SpO2 value and the pulse rate value are valid can be used. Immediately after the power is turned on, it waits for a certain period of time before the QV square matrix becomes stable and then switches to the Sensor Off state.

When the DC signal of the IR is greater than or equal to the first threshold value (threshold_IR1) preset for the IR, it is determined that the SpO2 sensor is normally connected, and the sensor is switched to the sensor on state. The thresholds for IR are set to two types (threshold_IR1, threshold_IR2) and hysteresis management is applied to prevent rapid state changes even in slight DC value fluctuations.

If the pulse rate is detected more than 5 times after entering the sensor on state, it is converted to the normal measurement state (Normal). If the AC value of IR is too small, it is assumed that the measurement is not normally performed, and the error_No Signal state is changed. SpO2 and pulse rate should not be displayed in any state other than the normal state.

7 shows an exemplary diagram for explaining the structure arrangement of a SpO2 sensor and a temperature sensor in an infant safety monitoring device, and the infant safety monitoring device may be worn on a specific body part of an infant, for example, a foot, in the form of a band .

As shown in FIG. 7, the light transmitting unit 111 and the light receiving unit 112 of the SpO2 sensor are structured to measure pulse waves on the toe or foot side of an infant, and the transducer 710 including the temperature sensor measures accuracy In consideration of the arrangement, the structure may be arranged to detect body temperature at the sole of the foot, for example, at a position spaced apart from the placement position of the SpO2 sensor.

Here, the SpO2 sensor and the transducer 710 may be configured to determine its structural arrangement in consideration of such measurement accuracy and a body worn part of an infant, and the SpO2 sensor and the transducer 710 may be disposed with the determined structural arrangement. .

For example, the transducer 710 may be disposed on a flexible PCB.

Such a temperature sensor reads a temperature value for an infant's body temperature and undergoes a moving average step, for example, a 10-point moving average step, that is, a signal stabilization process, and a specific temperature range, for example, through a single position calibration. , Calibration can be performed with a quadratic equation in the temperature range between 34 and 41 degrees. Here, it is also possible to repeatedly perform a process of collecting data for the calibration operation and calibrating considering the accuracy of the collected data.

As shown in FIG. 8, the transducer 710 is disposed with a temperature sensor on a PCB, and a liquid heat transfer material and a silver (Ag) electrode are sequentially formed on the temperature sensor to form a silver electrode. By directly contacting the infant's body, the infant's body temperature can be accurately detected through a temperature sensor.

Transducer 710 may form an insulating material (insulator) around the temperature sensor because the ambient temperature should not affect. That is, since the silver electrode of the transducer 710 is non-toxic, it is safe for infants and toddlers and is suitable for detecting temperature since it is good for heat transfer.

The infant safety monitoring device or the infant / child biological device may be attached to the baby's foot as shown in FIG. 9, contact the device of the present invention with the baby's foot, and socks or other fixing means (such as cloth). By fixing the device to the baby's feet using, it is possible to solve the problem that the device of the present invention falls even if the baby moves.

As described above, the method according to an embodiment of the present invention measures the oxygen saturation (SpO2) or pulse rate of an infant through a signal stabilization process when the motion value of the infant is detected using a device that can be worn on the infant and is smaller than a controllable motion threshold. By doing so, the safety of infants and toddlers can be monitored.

In addition, the method according to an embodiment of the present invention detects an immediate lying down state or a lying down state of an infant, and adjusts a movement threshold according to the lying down state, so that when in the lying down state, the oxygen saturation of the infant even if the motion value is more than a certain value (SpO2) Or by measuring the pulse rate, it is possible to prevent sudden death of infants and toddlers.

In addition, the method according to an embodiment of the present invention to automatically transmit the oxygen saturation (SpO2) or pulse rate of the infant to a preset user terminal, and by providing safety monitoring information based on the cloud, the guardian can easily check the infant and toddler status information It can be used conveniently even when the guardian leaves the infant and the child to work for a while.

The system or device described above may be implemented with hardware components, software components, and / or combinations of hardware components and software components. For example, the systems, devices, and components described in embodiments include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors (micro signal processors), microcomputers, field programmable arrays (FPAs). ), A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions, may be implemented using one or more general purpose computers or special purpose computers. The processing device may run an operating system (OS) and one or more software applications running on the operating system. In addition, the processing device may access, store, manipulate, process, and generate data in response to the execution of the software. For convenience of understanding, a processing device may be described as one being used, but a person having ordinary skill in the art, the processing device may include a plurality of processing elements and / or a plurality of types of processing elements. It can be seen that may include. For example, the processing device may include a plurality of processors or a processor and a controller. In addition, other processing configurations, such as parallel processors, are possible.

The software may include a computer program, code, instruction, or a combination of one or more of these, and configure the processing device to operate as desired, or process independently or collectively You can command the device. Software and / or data may be interpreted by a processing device, or to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodied in the transmitted signal wave. The software may be distributed on networked computer systems, and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

The method according to the embodiments may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiments or may be known and usable by those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs, DVDs, and magnetic media such as floptical disks. -Hardware devices specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine language codes produced by a compiler. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

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

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

Claims (5)

In the infant safety monitoring device worn on infants,
SpO2 sensor for measuring the pulse wave of the infant;
An acceleration sensor for detecting movement of the infant and toddler;
A temperature sensor for detecting the body temperature of the infant or toddler; And
SpO2 and pulse rate are detected from the measurement signal by the SpO2 sensor, the supine or prone position of the infant is detected from the measurement signal by the acceleration sensor, and the measurement signal by the temperature sensor is used. MCU to detect body temperature in infants and toddlers
Including,
The temperature sensor and the SpO2 sensor
Safety monitoring device for infants and toddlers arranged in a structure determined in consideration of measurement accuracy and performing body temperature and pulse wave measurements on the infant's foot.
According to claim 1,
The temperature sensor
It is formed on a PCB, a liquid heat transfer material and a silver (Ag) electrode are sequentially formed on the temperature sensor, so that the silver electrode directly contacts the infant, thereby detecting infant body temperature. Monitoring device.
According to claim 1,
First temperature sensor for detecting the external temperature of the infant
Further comprising,
The MCU
The infant safety monitoring device, characterized in that, in consideration of the body temperature and the external temperature of the infant, the threshold of the movement is set differently, and SpO2 and pulse rate are detected from the measurement signal by the SpO2 sensor based on the set threshold.
According to claim 1,
The MCU
The infant safety monitoring device, characterized in that the threshold of the movement is set differently based on the detected posture of the infant, and SpO2 and pulse rate are detected from the measurement signal by the SpO2 sensor based on the set threshold.
According to claim 1,
The MCU
The infant safety monitoring device, characterized in that the threshold of the movement is set differently based on the detected body temperature of the infant, and SpO2 and pulse rate are detected from the measurement signal by the SpO2 sensor based on the set threshold.

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