The present disclosure relates to a human body sensing mat that may analyze a motion and a bio-signal of a user.
Sleep is one of important factors for physical and mental health of a human. Adequate sleep is effective in recovering from fatigue, improving immunity and concentration, relieving stress, reducing inflammation, restoring muscles, and the like.
Accordingly, sleep assisting devices, sleep inducing devices, or sleep analyzing devices for proper and effective sleep have emerged. However, most of the current devices may operate only when various sensors and the like are worn on a body part of a user.
Such devices may rather cause inconvenience to the user in getting proper sleep, and may be cumbersome to use such devices. Accordingly, there is an increasing demand for a device capable of analyzing a motion and a bio-signal of the user without being worn on the user's body.
As shown in
The present disclosure is to provide a human body sensing mat that may analyze a motion and a bio-signal of a user regardless of a posture of the user.
A human body sensing mat according to an embodiment of the present disclosure includes a substrate, a sensor array including a plurality of fiber sensors for respectively generating signals based on a distance from a specific object, wherein the sensor array is disposed on the substrate, and a driver for applying a voltage to the sensor array, the sensor array includes a plurality of sensing lines arranged in parallel with each other in a first direction, and the plurality of sensing lines have a first spacing between adjacent sensing lines connected to different electrodes greater than a second spacing between adjacent sensing lines connected to the same electrode in a second direction.
The first spacing and the second spacing may be defined in a direction perpendicular to the first direction.
The human body sensing mat may further include a temperature sensor disposed on the substrate so as to measure a body temperature of a user, the sensor array may include a first sensor array disposed at one side of the substrate to correspond to an upper body of the user and a second sensor array disposed at the other side of the substrate to correspond to a lower body of the user, and the temperature sensor may be disposed between the first sensor array and the second sensor array.
The plurality of sensing lines may include a first sensing line and a second sensing line connected to different electrodes, the first sensing line and the second sensing line may be spaced apart from each other at a predetermined spacing and be arranged on the substrate in a zigzag form, the first spacing may be a distance between the first sensing line and the second sensing line closest to the first sensing line, and the second spacing may be a distance between a portion and another portion of the first sensing line or the second sensing line.
The first spacing may be in a range from 25 mm to 30 mm and a second spacing may be in a range from 10 mm to 15 mm.
The human body sensing mat may further include a plurality of connecting electrodes disposed at an edge of the substrate, wherein each of the plurality of connecting electrodes electrically connects each of the fiber sensors to the driver.
The human body sensing mat may further include a shielding layer for covering each of the connecting electrodes to block an electromagnetic field.
The shielding layer may be formed at an edge of the substrate.
The driver may output sleep information of a user using the signals respectively generated from the fiber sensors.
Each signal may be an impedance change caused by a distance between the user and each fiber sensor.
The driver may calculate posture information of the user based on the signals respectively generated from the fiber sensors and output the sleep information using the signals respectively generated from the fiber sensors and the posture information.
The driver may assign weights to the signals respectively generated from the fiber sensors based on the posture information and output the sleep information using the weighted signals.
According to the present disclosure, because the fiber sensors are individually arranged at the central portion of the mat, the breathing, tossing and turning, and the like of the user may be sensed regardless of the posture of the user. Therefore, the present disclosure may analyze the motion and the bio-signal of the user regardless of the posture of the user.
In addition, according to the present disclosure, because the different signals are generated depending on the position of the mat, the sleeping posture of the user may be recognized. The present disclosure may improve the sleep analysis accuracy by utilizing the sleeping posture information of the user.
Hereinafter, an embodiment disclosed herein will be described in detail with reference to the accompanying drawings. Regardless of the reference numerals, the same or similar components will be assigned the same reference numerals, and duplicated descriptions thereof will be omitted. In describing the embodiment disclosed herein, when it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed herein, a detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiment disclosed herein. It should be understood that the technical idea disclosed herein is not limited by the accompanying drawings and includes all changes, equivalents, or substitutes included in the spirit and scope of the present disclosure.
Hereinafter, a human body sensing mat according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. Herein, an example of analyzing sleep of a user using the human body sensing mat is described, but the human body sensing mat according to the present disclosure may not be limited to the sleep of the user, and may analyze a motion and a bio-signal of the user from various viewpoints.
The human body detection sensor 200 according to the present disclosure includes a substrate 210, sensor arrays 220a to 220d, a shield layer 230, and a driver 240. However, the present disclosure may not be limited thereto, and the human body detection sensor according to the present disclosure may include components of the number greater or smaller than the number of components described above.
Hereinafter, the above-described components will be described in detail.
The substrate 210 is used as means for fixing the sensor array 220a to 220d and the shield layer 230. Because the mat according to the present disclosure may be used in different aspects, such as being used in a fully unfolded state, being used in a partially folded state, or the like, the substrate 210 is preferably made of a bendable and flexible material.
The material constituting the substrate 210 is not limited, but the substrate 210 is preferably made of a material that is bendable and washable because of a nature of the mat.
The sensor arrays 220a to 220d are disposed on the substrate 210. The sensor arrays 220a to 220d include a plurality of fiber sensors 220a to 220d that generate signals based on a distance from a specific object. In this regard, each of the fiber sensors may be composed of an electrode whose impedance value changes based on the distance from the specific object.
Specifically, each of the fiber sensors 220a to 220d may be formed as an LC Tank. The LC tank is a sensor that infers a change in a capacitance using an amount of oscillation frequency shifted based on the change in the capacitance. When the LC Tank is used, a distance between a user's body and each of the fiber sensors may be sensed.
The change in the impedance in each of the fiber sensors 220a to 220d may be measured, and a posture and a breathing pattern of the user may be calculated using the measurement.
For example, as shown in
The change in the impedance of each of the fiber sensors 220 occurs by a change in a distance between the user and each of the fiber sensors, even when each of the fiber sensors 220 does not come into contact with the user's body. Therefore, when the fiber sensors are utilized, the sleep of the user may be analyzed even when the user and the sensors do not come into contact with each other.
The fiber sensors 220a to 220d may be disposed on a central portion of the substrate and on both ends of the substrate. In one embodiment, four fiber sensors 220a to 220d may be arranged side by side in a longitudinal direction of the mat as shown in
Because different signals are respectively generated from the fiber sensors, no matter where the user is located on the mat, at least one of the fiber sensors may sense the posture and the breathing pattern of the user.
In one example, each of the fiber sensors 220 may be formed in a stranded wire or a litz structure. Therefore, a sensing sensitivity may be increased compared to that in a single wire structure.
In one example, in order to induce the change in the impedance of each of the fiber sensors 220, a voltage must be applied to each of the fiber sensors. The driver 240 applies the voltage to each of the fiber sensors 220a to 220d and measures the change in the impedance of each of the fiber sensors 220a to 220d. Specifically, as shown in
In one example, the driver 240 may be detachable from the mat 200. To this end, the present disclosure may further include a connector 250 electrically connected to connecting electrodes 221a to 221d. The connector 250 may be formed to be detachable from the driver 240. The user may easily electrically connect the driver 240 to the connecting electrodes 221a to 221d by coupling the driver 240 to the connector 250. Based on the structure described above, because the user may wash only the remaining portions after removing the driver 240, the mat may be easily washed.
In one example, the human body sensing mat according to the present disclosure may include a temperature sensor, a humidity sensor, an illuminance sensor, an acoustic sensor, and the like. The driver 240 may provide sleep-related information based on information sensed by the sensors.
For example, the driver 240 may comprehensively analyze a temperature, a humidity, an illuminance, and a noise level around the mat, and output a sleep environment grade to the user. As the elements are more suitable for a sleeping environment, a higher grade may be output. The user may identify the sleep grade and take action to increase the sleep grade. Specifically, when the sleep grade is low due to low ambient humidity, the user may increase the sleep grade by operating a humidifier or the like to increase the ambient humidity.
In one example, the mat 200 according to the present disclosure may further include each of the connecting electrodes 221a to 221d for electrically connecting the driver 240 to each of the fiber sensors 220a to 220d. Specifically, each of the connecting electrodes 221a to 221d is disposed at an edge of the substrate to electrically connect each of the fiber sensors 220a to 220d to the driver 240. Because the individual connecting electrode is connected to each of the fiber sensors 220a to 220d, there may be the plurality of connecting electrodes.
The plurality of connecting electrodes may overlap each other at a specific point of the substrate. Specifically, as in an area A in
The connecting electrodes 221a to 221d may be made of the same material as that of the fiber sensors. In this case, the connecting electrodes 221a to 221d generate signals based on a distance from the specific object. Because it is difficult to distinguish the signals generated from the connecting electrodes 221a to 221d and the signals generated from the fiber sensors 220a to 220d respectively connected to the connecting electrodes from each other, each of the connecting electrodes may also be considered as a portion of each of the sensors.
It is not a problem to use each of the connecting electrodes as the portion of each of the sensors at a position where the connecting electrodes 221a to 221d do not overlap each other, but it is a problem to use each of the connecting electrodes as the portion of each of the sensors at a position where the connecting electrodes overlap each other.
For example, when the signal generated from the connecting electrodes 221a to 221d that are disposed adjacent to the driver 250 and are overlapping each other as in the area A in
In order to prevent such problem, the mat according to the present disclosure may further include a shield for covering each of the connecting electrodes 221a to 221d and shielding an electromagnetic field.
The shield blocks the electromagnetic field to prevent the change in the impedance of each of the connecting electrodes from occurring based on the change in the distance between each of the connecting electrodes and the specific object. When the shield is disposed at the edge of the substrate at which the connecting electrodes are disposed, the change in the impedance may be prevented from occurring at the connecting electrodes. Therefore, an inaccurate signal may be prevented from being generated at the position where the connecting electrodes overlap each other. In one embodiment, as shown in
As described above, the present disclosure may utilize the shield to enable the accurate sleep analysis even when the user approaches the area where connecting electrodes overlap each other during the sleep.
Hereinafter, a specific example of application of the human body sensing mat according to the present disclosure will be described. In one embodiment, as shown in
An x-axis in
In one example, the present disclosure may improve sleep analysis accuracy by synthesizing the signals generated from the fiber sensors placed at different positions on the mat. Hereinafter, a method for controlling a driver for improving the accuracy of the user's sleep analysis using the above-described human body sensing mat will be described.
The driver 240 may calculate posture information of the user based on the signal generated from each of the fiber sensors, and may output sleep information using the signal generated from each of the fiber sensors and the posture information.
Specifically, the driver 240 may calculate an area of the mat occupied by the user using the fiber sensors. Specifically, as in a first posture shown in
In one example, the driver 240 may output the sleep information to an output unit separately disposed on the mat or to a terminal capable of wireless communication with the driver 240.
In one example, the driver 240 may assign weights to the signals respectively generated from the fiber sensors based on the calculated posture information, and output the sleep information using the weighted signals.
Specifically, in analyzing the breathing pattern of the user, the driver 240 may assign a high weight to a signal generated from a fiber sensor disposed in a specific area. Specifically, the driver 240 may predict an area in which a chest of the user is located from the posture information, and assign the highest weight to a signal generated from a fiber sensor disposed in the area where the chest is located. This is because a body part where a change occurs the most when the user breathes is the chest.
For example, when the user is sleeping as in the first posture shown in
As described above, when the sleep of the user is analyzed based on the posture of the user, the sleep analysis accuracy may be improved.
Referring to
In addition, the plurality of sensor arrays 220a, 220b, 220c, and 220d respectively corresponding to a plurality of areas or channels may be sequentially disposed in the central portion of the substrate 210 in a longitudinal direction. For example, the unit sensor arrays 220a, 220b, 220c, and 220d, each of which has a width w2 of 700 mm and a vertical dimension 13 of 313.5 mm, may be sequentially arranged in the longitudinal direction of the substrate 210 to respectively correspond to the four channels. In this regard, a distal sensor array among the unit sensor arrays 220a, 220b, 220c, and 220d may be disposed to be spaced apart from an end of the substrate 210 by a predetermined distance 12. In this regard, at least two (e.g., 220a and 220b or 220c and 220d) of the sensor arrays may be disposed adjacent to each other at one side or the other side of the substrate 210 corresponding to an upper body or a lower body of the user.
Referring to
Referring to
Referring to
When the spacing between the sensing lines is too great, a space efficiency and an accuracy of the measured impedance value are deteriorated. In addition, even when the spacing between the sensing lines is too small, the interference occurs between the adjacent sensing lines, resulting in an inaccurate measured impedance value. That is, in setting the first and second spacings d1 and d2, the space efficiency and the measurement accuracy are considered. For example, the first spacing d1 may be in a range from 25 mm to 30 mm, and the second spacing d2 may be in a range from 10 mm to 15 mm.
Referring to
Referring to
That is, the human body sensing mat 200 according to an embodiment of the present disclosure may calculate a more accurate measurement result by minimizing noise caused by the interference between the sensing lines.
Referring to
Comparing the result measured by the sleep analysis equipment with the result measured by the human body sensing mat 200, it may be seen that a deviation Error mat between mean values Mean of the both results is about 6.7 percent, an accuracy of the sleep efficiency measured by the human body sensing mat 200 calculated as such is about 93.3 percent, and an error range SD is about 5.7 percent.
According to the present disclosure, because the fiber sensors are individually arranged at the central portion of the mat, the breathing, tossing and turning, and the like of the user may be sensed regardless of the posture of the user. Therefore, the present disclosure may analyze the motion and the bio-signal of the user regardless of the posture of the user.
In addition, according to the present disclosure, because the different signals are generated depending on the position of the mat, the sleeping posture of the user may be recognized. The present disclosure may improve the sleep analysis accuracy by utilizing the sleeping posture information of the user.
It is apparent to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the spirit and essential characteristics of the present disclosure.
In addition, the above detailed description should not be construed as restrictive in all respects, but should be considered as illustrative. The scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present disclosure are included in the scope of the present disclosure.
Filing Document | Filing Date | Country | Kind |
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PCT/KR2019/016693 | 11/29/2019 | WO |