KR102404032B1 - Fall-down danger detection system using multiple sensors - Google Patents

Abstract

The bed body on which the mattress is seated; a leg portion coupled to the body portion and having a movable driving wheel installed therein; a first sensor module for measuring the position of the user in the upper surface of the mattress through the first measurement value of the first sensor coupled to the leg portion; And through the second measurement value of the second sensor disposed on the mattress, a second sensor module for detecting the user toss and turns in the upper surface of the mattress; provides a fall risk detection system using multiple sensors comprising a.

Description

FALL-DOWN DANGER DETECTION SYSTEM USING MULTIPLE SENSORS

The present invention relates to a fall risk detection system capable of preventing a fall risk by detecting in advance the fall risk of an elderly person or a patient with reduced mobility in a hospital or the like.

Recently, hospitals are introducing an integrated nursing and nursing service system in which nurses provide nursing services instead of caregivers or guardians. Accordingly, the demand for nursing manpower has increased explosively, and the shortage of nursing manpower has further intensified. On the other hand, 40% of patient safety accidents that occur in medical institutions such as hospitals are falls that occur in hospital beds. A fall accident is an accident in which a patient falls out of bed. Falls usually occur when a patient gets off the bed after lowering the side rail. Not only patients, but also people with reduced mobility or the elderly are prone to fall accidents.

To this end, the medical bed is equipped with side rails on both sides of the bed to prevent falls. However, the side rails cause psychological inconveniences such as stuffiness and restraint to the patient lying on the bed. As a result, the patient lowers the side rail on his own and causes an accident while trying to get out of bed.

In addition, the repeated operation of raising or lowering the side rail frequently causes inconvenience in use. As a result, the frequency of use of the side rail is reduced, and the risk of a fall accident further increases. In addition, in the case of a patient with poor mobility, there is a risk factor that an accidental fall occurs while operating the side rail, or the side rail fails to support the weight of the patient.

As a result, legal disputes between medical institutions and patients/guardians frequently occur. The Ministry of Health and Welfare issued a safety warning for fall accidents, and medical institutions are also trying to prevent and manage more aggressively recently.

Looking at the prior literature, in order to solve the above problems, various devices, methods, etc. have been proposed and disclosed. However, the conventional apparatus and method have various problems such as frequent errors, low reliability, and high cost in detecting or predicting the risk of a fall.

Republic of Korea Patent Publication No. 10-2017-0035851 (published on March 31, 2017) Republic of Korea Patent Publication No. 10-2018-0095242 (published on August 27, 2018) Republic of Korea Patent Publication No. 10-2016-0004679 (published on Jan. 13, 2016)

An embodiment of the present invention has been devised to solve the above problems, and by accurately and effectively detecting a fall risk in advance, a fall using a multi-sensor that can relieve the load of nursing and nursing care and improve work efficiency We want to provide a risk detection system.

In addition, individual components are produced in module units to maximize the convenience of maintenance/management. In addition, it is intended to minimize the cost of maintenance/management by improving the durability of various sensors for detecting the risk of falling. In addition, by facilitating the coupling relationship between the individual components, it is possible to easily exchange or replace it even if there is some failure. In addition, by using a non-contact and non-aware method, it is intended to reduce a kind of rejection according to the user while being neat in appearance. In addition, we want to provide a customized system that can reflect the user's personal characteristics.

Through this, it is intended to provide a fall risk detection system that can improve overall quality and performance of the system and secure overall competitiveness.

An embodiment of the present invention to solve the above problems, the bed body portion on which the mattress is seated; a leg portion coupled to the body portion and having a movable driving wheel installed therein; a first sensor module for measuring the position of the user in the upper surface of the mattress through the first measurement value of the first sensor coupled to the leg portion; And through the second measurement value of the second sensor disposed on the mattress, a second sensor module for detecting the user toss and turns in the upper surface of the mattress; provides a fall risk detection system using multiple sensors comprising a.

a first inclined frame having one end coupled to a lower portion of the body portion to be reciprocally slidably coupled to the leg portion, and a foot member fitted to the other end thereof; a second inclined frame having one end rotatably coupled to the lower portion of the main body and the other end rotatably coupled to the first inclined frame; and a horizontal frame connected between the first inclined frames and to which the driving wheels are coupled to both ends.

The first sensor is coupled to the driving wheel,

Preferably, in the first mode, the driving wheel is in contact with the ground, the foot member is located above the ground, and in the second mode, the foot member is in contact with the ground, and the first measurement value is not generated. .

The first sensor is coupled to the foot member,

Preferably, in the first mode, the driving wheel is in contact with the ground, the first measured value is not generated, in the second mode, the foot member is in contact with the ground, and the driving wheel is located above the ground .

Preferably, the first sensor is a weight sensor.

The second sensor module includes: a piezoelectric sensor pad in which the second sensor is disposed on a rectangular thin pad to measure a user's biosignal in real time; and a second signal processing unit electrically connected to the piezoelectric sensor pad and analyzing and processing the biosignal.

The first sensor module and the second sensor module, each of which is connected to the receiving unit through a wireless network; further comprising, electrically connected to the receiving unit, by analyzing the location information and toss and down information to determine the user's fall risk fall risk It is preferable to further include a judgment unit.

According to the problem solving means of the present invention as described above, various effects including the following items can be expected. However, the present invention is not established only when exhibiting all of the following effects.

A fall risk detection system using multiple sensors according to an embodiment of the present invention can accurately and effectively detect a fall risk in advance, thereby relieving the load of nursing and nursing care and improving work efficiency.

In addition, by producing individual components in module units, it is possible to maximize the convenience of maintenance/management. In addition, it is possible to minimize the cost of maintenance/management by improving the durability of various sensors for detecting the risk of a fall. In addition, by facilitating the coupling relationship between the individual components, it can be easily exchanged or replaced even if there is some failure or the like. In addition, by using the non-contact and insensitive method, it is possible to reduce a kind of rejection according to the user while being neat in appearance. In addition, the user's personal characteristics may be reflected.

Through this, it is possible to provide a fall risk detection system capable of improving overall quality and performance of the present system and securing overall competitiveness.

1 is a perspective view of a fall risk detection system according to an embodiment of the present invention.
Fig. 2 is a conceptual diagram showing the schematic configuration of Fig. 1;
Fig. 3 is a side view seen in the first mode;
Fig. 4 is a side view seen in the second mode;
Figure 5 is a bottom perspective view of the mattress cover of Figure 1;
Figure 6 is a perspective view of the second sensor module of Figure 1;

Hereinafter, in the description of the present invention, if it is determined that the subject matter of the present invention may be unnecessarily obscured as it is obvious to those skilled in the art with respect to related known functions, the detailed description thereof will be omitted. The terminology used in the present application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a fall risk detection system according to an embodiment of the present invention, FIG. 2 is a conceptual diagram showing the schematic configuration of FIG. 1 , FIG. 3 is a side view seen in the first mode, and FIG. 4 is a second mode This is a side view, FIG. 5 is a bottom perspective view of the mattress cover of FIG. 1 , and FIG. 6 is a perspective view of the second sensor module of FIG. 1 .

1 to 6 , a fall risk detection system using multiple sensors according to an embodiment of the present invention includes a body part 100, a leg part 200, a first sensor module 400, and a second sensor module. (500) and the like. Beds are included regardless of their use and specifications, such as for home use or hospital use.

The body part 100 is a part on which the mattress is seated in the bed. The body part 100 is generally rectangular in shape, and may be composed of a plurality of frames (metal, wood material, etc.). A coupling structure to which the leg part 200 is coupled is formed in the lower portion of the body part 100 . The coupling structure may include a guide unit 110 having a moving distance within a certain range, a moving unit 120 reciprocating along the guide unit 110 , and the like. For example, the guide part 110 is preferably a guide hole formed in the lower part of the body part 100 . In addition, it is preferable that the moving part 120 is a moving rod connecting the guide holes facing each other. On the other hand, the main body 100 may further include a top plate for stably supporting the mattress.

The leg part 200 is coupled to the body part 100 , and a driving wheel 250 capable of rolling is installed. The leg part 200 is in contact with the ground by the driving wheel 250 in the first mode, and is fixed to the ground by the foot member 260 in the second mode. The leg portion 200 generally has four legs. Here, the leg unit 200 can be raised or lowered according to a mode change, so that the height can be adjusted within a certain range. The leg part 200 according to an embodiment has a 'y' shape.

Specifically, the leg part 200 may include a first inclined frame 210 , a second inclined frame 220 , a horizontal frame 230 , a driving wheel 250 , a foot member 260 , and the like. At this time, the first inclined frame 210 and the second inclined frame 220 may be link-coupled. In addition, the leg part 200 can properly distribute the load applied to the leg part 200 through the coupling structure between the first inclined frame 210 , the second inclined frame 220 and the horizontal frame 230 . have. The first inclined frame 210 , the second inclined frame 220 , and the horizontal frame 230 are preferably formed of a metal material.

One end of the first inclined frame 210 is coupled to the lower portion of the main body 100 to be reciprocally slidably moved. Four of the first inclined frames 210 may be used to correspond to the guide unit 110 . Specifically, the first inclined frame 210 is rotatably coupled to the moving part 120 , and when the moving part 120 moves along the guide part 110 , the first inclined frame 210 and the main body part ( 100) is formed between the lower part of the inclination angle is different.

In addition, the foot member 260 may be fitted to the other end of the first inclined frame 210 . Alternatively, the driving wheel 250 may be formed at the other end of the first inclined frame 210 . The foot member 260 is formed of a synthetic resin material, a urethane material, or the like, and provides high frictional force to the ground. As a result, in the second mode, the leg part 200 may be fixed to the ground by the foot member 260 .

One end of the second inclined frame 220 is rotatably coupled to the lower part of the main body 100 in a predetermined angle range, and the other end is rotatably coupled to the first inclined frame 210 in a predetermined angle range. When one end of the second inclined frame 220 slides and moves, the second inclined frame 220 is dependent on it, and both ends rotate.

The horizontal frame 230 connects between the first inclined frames 210, and the driving wheels 250 are coupled to both ends. The horizontal frame 230 is disposed between the first inclined frames 210 moving in the same direction, and connects them. That is, the horizontal frame 230 is disposed between the pair of first inclined frames 210 .

Also, between the main body 100 and the horizontal frame 230 , for example, a driving unit such as an actuator 270 may be installed. The actuator 270 provides a driving force during the mode change process of the leg unit 200 .

The driving wheel 250 is preferably coupled to the horizontal frame 230 so that a vertical relationship can be formed between the direction of the load transmitted through the driving wheel 250 and the ground in the first mode. In addition, it is preferable that the driving wheel 250 is formed at a position where the load applied by the main body 100 is evenly distributed. In this way, the driving wheel 250 may be, for example, a caster. The driving wheel 250 is a part in direct contact with the ground, and receives a reaction force due to a load as it is. The driving wheels 250 may distribute the load applied to the ground according to their location, number, and the like. The driving wheel 250 can be smoothly rolled through a urethane wheel or the like, and shock absorption is easy even with a sudden change in load.

The user may adjust the height of the body part 100 by changing the mode of the leg part 200 . To this end, a locking groove (not shown) may be formed in the guide part 110 . Alternatively, the mode may be divided into a first mode that is a descending mode and a second mode that is an ascending mode. In this case, the mode change may be made according to the user's subjective intention. Alternatively, the mode change may be set based on the user's sleep information. For example, the first mode may be maintained during the user's sleep section. On the other hand, the second mode may be maintained for a period of time before and after the sleep period when the risk of falling is relatively low.

The leg unit 200 may be positioned in any one of the first mode and the second mode according to a mode change. In the first mode, the driving wheel 250 is in contact with the ground, and the foot member 260 is located above the ground. That is, a certain interval is formed between the foot member 260 and the ground. At this time, the load is transmitted to the ground only through the driving wheel (250). Meanwhile, in the second mode, the foot member 260 is in contact with the ground, and the driving wheel 250 is located above the ground. As a result, in the first mode, the load transmitted through the driving wheel 250 is transmitted to the ground only through the foot member 260 .

The first sensor module 400 measures a position in the upper surface of the user's mattress through the first measurement value of the first sensor 410 coupled to the leg portion 200 . The first sensor module 400 may include a first sensor 410 , a first signal processing unit 420 , and the like. First, the first sensor 410 is preferably a weight sensor (load cell).

According to an embodiment, the first sensor 410 may be coupled to the driving wheel 250 . That is, one first sensor 410 may be coupled to one driving wheel 250 . In this case, the first sensor module 400 may include a total of four first sensors 410 . The first sensor 410 measures the weight transmitted from each installation location. In the case of one embodiment, in the first mode, the driving wheel 250 is in contact with the ground, and the foot member 260 is located above the ground. As a result, the first sensor 410 may generate a first measurement value in the first mode. And, in the second mode, the foot member 260 is in contact with the ground, and the first measurement value is not generated. As such, since the measurement state of the first sensor module 400 is changed according to the mode, durability of the first sensor 410 can be improved.

Alternatively, in another embodiment, the first sensor 410 may be coupled to the foot member 260 . That is, one first sensor 410 may be coupled to the foot member 260 for each one of the foot members 260 . In this case, the first sensor module 400 may include a total of four first sensors 410 . In another embodiment, in the first mode, the driving wheel 250 is in contact with the ground, and the first measurement value is not generated. And, in the second mode, the foot member 260 is in contact with the ground, and the driving wheel 250 is located above the ground. As a result, the first sensor 410 may generate the first measurement value in the second mode. As such, since the measurement state of the first sensor module 400 is changed according to the mode, durability of the first sensor 410 can be improved.

The first signal processing unit 420 is electrically connected to the first sensor 410 , respectively. The first signal processing unit 420 may be installed, for example, on the lower surface of the main body 100 . In this way, the first signal processing unit 420 specifically includes a position measuring unit 422 , a first communication unit 424 , and the like. The position measuring unit 422 measures the user's position by analyzing and processing the first measured values respectively measured by the first sensor 410 . In addition, the position measuring unit 422 may model the user's position in the form of a single point by the center of gravity, and visually express it through planar coordinates.

The first communication unit 424 may transmit the location information of the location measuring unit 422 to a plurality of preset receiving units 810 . The first communication unit 424 may use a short-range wireless network such as Wi-Fi, Bluetooth, or Zigbee. The first communication unit 424 may use a wireless network such as LTE (LTE) and LoRa (LoRa). Meanwhile, the receiver 810 includes a server of a patient management system constituting a nursing station such as a hospital. In addition, the receiver 810 may include a device of a specific person (medical staff, guardian, etc.) stored in advance, for example, a smartphone.

The first sensor module 400 may measure the user's position in a non-contact manner. Meanwhile, the first sensor module 400 receives power through a power box (not shown) disposed on the main body 100 and the like.

The second sensor module 500 detects toss and turns in the upper surface of the mattress of the user through the second measurement value of the second sensor disposed on the mattress. Here, the mattress refers to a thick mattress for a bed, and a spring or sponge is put therein to provide a cushion and is made soft. As such, the mattress usually has a rectangular parallelepiped shape with a low height. The user can sit or lie down on the upper surface of the mattress. On the other hand, the mattress cover 700 has a purpose of wrapping the mattress.

Specifically, the second sensor module 500 may include a piezoelectric sensor pad 510 , a second signal processing unit 520 , and the like. In the piezoelectric sensor pad 510, at least one second sensor is disposed on a rectangular thin pad to measure a user's bio-signals in real time. At this time, the length of the horizontal side of the piezoelectric sensor pad 510 is preferably the same as the length of the horizontal side of the mattress. The piezoelectric sensor pad 510 may measure a plurality of signals related to the user's heart rate, respiration rate, movement, and the like. When the measurement signal is weak, the piezoelectric sensor pad 510 may amplify it through calibration. The second sensor module 500 may analyze the heart rate, respiration rate, etc. measured by the piezoelectric sensor pad 510 to determine the user's sleep state, health abnormalities, and the like.

The piezoelectric sensor pad 510 is formed at a specific position among the lower surfaces of the mattress cover 700 . Mattress cover 700 according to an embodiment has a longer rectangular shape in the vertical direction as described above. When the user takes a lying posture on the mattress on which the mattress cover 700 is covered, the upper body region 720 on which the user's upper body is placed may be formed on the upper surface of the mattress cover 700 . However, the upper body region 720 is not fixed, and its position may vary depending on the user's personal information (height, body shape, etc.) and sleep information.

At this time, a first storage area 730 formed in the horizontal direction of the mattress cover 700 at a position opposite to the upper body area 720 may be formed on the lower surface of the mattress cover 700 . The first storage area 730 may be formed in a pocket shape, for example. Meanwhile, a plurality of first storage areas 730 may be formed. In this case, the first storage areas 730 may be spaced apart from each other or adjacent to each other. Also, the first storage areas 730 may be formed to have the same shape as each other. Each individual first storage area 730 may be formed in the form of a pocket, for example.

The piezoelectric sensor pad 510 may be accommodated in a pocket formed in the mattress cover 700 . At this time, the pocket may be formed on either the outer surface or the inner surface of the mattress cover (700). Here, the mattress cover 700 is usually made of a fabric material such as cloth, and when the piezoelectric sensor pad 510 is accommodated in the pocket, the entrance of the pocket in this state may be sewn by a method such as stitching with a thread.

Meanwhile, the formation position of the first storage area 730 may vary according to the user's personal information, sleep information, and the like. In consideration of this point, it is preferable that the first storage area 730 be formed vertically below the center of gravity of the user's upper body.

The second signal processing unit 520 may include a filtering unit 521 , an operation unit 522 , an analysis unit 523 , a second communication unit 524 , and the like. The filtering unit 521 filters the signal data measured through the piezoelectric sensor pad 510 in a preset time unit to extract a heart rate waveform, a respiration rate waveform, a toss and turn waveform, and the like. The filtering unit 521 may be configured in a form in which hardware and/or software are combined. Also, the filtering unit 521 may divide and extract each of the above-described waveforms by a preset time unit such as 3 seconds or 5 seconds, for example. And, by amplifying it, it is possible to provide a change to the user's biosignal.

The calculating unit 522 converts the toss and turns waveform to form a representative value. The calculation unit 522 forms a representative value by digitizing the degree of tossing of each tossing waveform within the above-described unit time. The analysis unit 523 distinguishes and analyzes the degree of tossing using the number of times the representative value exceeds a threshold value determined to be tossing and turning and the size of the representative value. However, this degree of tossing and turning is determined based on experience and experiments obtained through numerous sample data measured in advance. On the other hand, toss and turn may be divided into, for example, normal tossing and severe tossing.

The second communication unit 524 may transmit the toss and down information of the second signal processing unit 520 to a plurality of preset reception units 810 . The second communication unit 524 may be the same as the first communication unit 424 . The second communication unit 524 may use a short-range wireless network such as Wi-Fi, Bluetooth, or Zigbee. The second communication unit 524 may use a wireless network such as LTE (LTE) or LoRa (LoRa). Meanwhile, the receiver 810 includes a server of a patient management system constituting a nursing station such as a hospital. In addition, the receiver 810 may include a device of a specific person (medical staff, guardian, etc.) stored in advance, for example, a smartphone.

On the other hand, the second signal processing unit 520 is preferably arranged in the second storage area 740 formed on one side of the mattress cover (700). Here, the mattress cover 700 is usually made of a fabric material such as cloth, and the second storage area 740 may be formed in the form of a pocket such as a pocket. At this time, the position of the second signal processing unit 520 is fixed by a method such as stitching with a thread in a state in which it is stored in a pocket, and the like, and can be sutured at the same time.

The second sensor module 500 may estimate the user's toss and downs in a non-contact manner. On the other hand, the second sensor module 500 receives power through a power box (not shown) disposed on the main body 100 and the like.

The receiver 810 may be connected to the first sensor module 400 and the second sensor module 500 through a wireless network, respectively. At this time, the fall risk determining unit 600 is electrically connected to the receiving unit 810, and analyzes the location information and the tossing and turning information to determine the user's fall risk. In this case, the fall risk determination unit 600 may provide the fall risk as a probability. Alternatively, the fall risk determination unit 600 may provide information on the risk of a fall by using a grade divided into several stages. Here, the fall risk determining unit 600 may differentiate the weight for the fall risk by dividing the day and night, the sleeping section and the non-sleep section, more specifically, for a plurality of time zones. This may be based on the user's sleep information (statistical value within a certain period) measured through the second sensor module 500 .

Next, the function of the fall risk determining unit 600 will be described based on the case in which the first sensor 410 is coupled to the driving wheel 250 . At this time, the fall risk determination unit 600 may operate only in the first mode. That is, in the second mode, no matter how great the risk of a fall for the user, the fall risk determining unit 600 cannot determine it.

Also, in the second mode, when the second measured value is not detected for a preset time, the second sensor module 500 may transmit a first notification signal to the receiver 810 . This is regarded as a case in which the user leaves the bed, and provides an alarm message at the 'warning' level to the receiver 810 .

In addition, when the first notification signal is generated and a biosignal through the second sensor module 500 is not detected even if a predetermined period of time has elapsed from that time, the second sensor module 500 sends the information to the receiving unit 810 . 2A notification signal can be transmitted. This guides a nurse or the like to check again whether the user has returned. Contrary to this, when the first notification signal is generated and a bio-signal is detected through the second sensor module 500 within a predetermined time thereafter, the second sensor module 500 sends a third notification signal to the receiver 810 . can be transmitted. This provides the user's return information to a nurse or the like.

In addition, the present system may further include a user management unit (not shown). The user management unit serves to store the user's personal information. Personal information includes the user's age, body (height, weight) information, sleep information, past disease history, and the like. In addition, the user management unit is connected to the first sensor module 400 and/or the second sensor module 500 through a wireless network, and pattern information about the user's heart rate, etc. can be transmitted.

In the above, preferred embodiments of the present invention have been exemplarily described, but the scope of the present invention is not limited to such specific embodiments, and can be appropriately changed within the scope described in the claims.

100: body part 200: leg part
400: first sensor module 500: second sensor module
600: fall risk judgment unit
210: first inclined frame 220: second inclined frame
230: horizontal frame 250: drive wheel
260: foot member 270: actuator
410: first sensor 420: first signal processing unit
422: position measurement unit 424: first communication unit
510: piezoelectric sensor pad 520: second signal processing unit
521: filtering unit 522: calculating unit
523: analysis unit 524: second communication unit
700: mattress cover 720: upper body area
730: first storage area 740: second storage area
810: receiver

Claims (7)

The bed body on which the mattress is seated;
a leg portion coupled to the body portion and having a movable driving wheel installed therein;
a first sensor module for measuring the position of the user in the upper surface of the mattress through the first measurement value of the first sensor coupled to the leg; and
A second sensor module for detecting the user's toss and downs in the upper surface of the mattress through the second measurement value of the second sensor disposed on the mattress; includes;
The leg unit is positioned in any one of a first mode, which is a descending mode, and a second mode, which is an ascending mode. and, in the second mode, the first sensor does not generate the first measured value,
The second sensor module includes a piezoelectric sensor pad disposed on the lower surface of the mattress cover and a second signal processing unit electrically connected to the piezoelectric sensor pad to analyze and process a user's biosignal, the second signal processing unit is disposed in the second storage area formed in the form of a pocket on one side of the mattress cover,
Further comprising; a fall risk determination unit for determining the user's fall risk by analyzing the location information and tossing and turning information, wherein the fall risk determination unit operates only in the first mode,
The second sensor module,
1) In the second mode, when the second measurement value is not detected for a preset time, a first notification signal is transmitted to the receiver, and 2) even if a predetermined time elapses after the first notification signal is generated, the second When the second measurement value is not detected, a second notification signal is transmitted to the receiver, and 3) when the second measurement value is detected after the first notification signal is generated, the user's return information is provided to the receiver transmits a third notification signal to
The fall risk judging unit provides information on the fall risk using a grade, and divides it for a plurality of time zones to vary the weight for the fall risk. According to claim 1, wherein the leg portion
a first inclined frame having one end coupled to a lower portion of the main body so as to be reciprocally slidably coupled, and the other end having a foot member fitted thereinto;
a second inclined frame having one end rotatably coupled to the lower portion of the main body and the other end rotatably coupled to the first inclined frame; and
A fall hazard detection system using multiple sensors including a; a horizontal frame that connects between the first inclined frames and to which the driving wheels are coupled to both ends. delete delete The method of claim 1,
The first sensor is a weight sensor, a fall risk detection system using multiple sensors. The method of claim 1,
The piezoelectric sensor pad is a fall risk detection system using multiple sensors in which the second sensor is disposed on a rectangular thin pad and measures a user's bio-signals in real time. delete

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