KR102628197B1 - Mattress for prevent bedsore using fabric body-pressure sensor and method for controlling the same - Google Patents

Abstract

A bedsore prevention mattress using a fiber-type body pressure sensor and its control method are provided. The bedsore prevention mattress includes a plurality of embossed cells repeatedly arranged along at least one direction and controlled independently from each other; and a pressure sensor layer disposed on top of the plurality of embossed cells.

Description

Mattress for preventing bedsores using a fiber-type body pressure sensor and its control method {MATTRESS FOR PREVENT BEDSORE USING FABRIC BODY-PRESSURE SENSOR AND METHOD FOR CONTROLLING THE SAME}

The present invention relates to an anti-bedsore mattress and a method for controlling the same. In detail, it relates to a pressure ulcer prevention mattress using a fiber-type body pressure sensor and a method of controlling the same.

In general, a bedsore refers to an ulcer in which the tissue surface is locally defective or depressed due to tissue necrosis due to continuous or repetitive pressure. Bedsores mainly occur in patients who lie down for long periods of time or cannot move on their own, as well as the elderly. Factors that cause bedsores include pressure, friction, and moisture, but because pressure is the most direct and important cause, they are also called pressure ulcers.

If the cause of bedsores is not improved, it can lead to a chronic disease. Chronic bedsores can cause osteomyelitis or, in severe cases, sepsis. The best way to treat or prevent bedsores in bedridden patients is to change positions at regular intervals to distribute pressure.

In this regard, various studies are being conducted to measure the distribution of the patient's body pressure by applying a pressure sensor or body pressure sensor to the mattress of a patient in bed, as shown in Patent Document 1, and to treat or prevent bedsores based on this.

Republic of Korea Patent Publication No. 10-2317323, multi-layer structure body pressure sensor Republic of Korea Patent Publication No. 10-2021-0059908, Embedded pressure ulcer prevention device using the user's body pressure characteristics and pressure ulcer prevention mat using the same Republic of Korea Patent Publication No. 10-2008784, smart bed system using grid-shaped arrangement of pressure sensors

Conventional mattresses for patients with bedsores or mattresses for preventing bedsores mainly use a floating member to at least partially float a specific part of the body of a bedridden patient and periodically lower the pressure applied through this. Furthermore, recent attempts have been made to sense the patient's body pressure distribution and control the flotation member based on this.

At this time, the biggest technical challenge in conventional bedsore prevention mattresses is the combined structure of the body pressure sensor and a plurality of flotation members. In order to measure a precise body pressure profile, a body pressure sensor must be placed on the upper side, but the movement of the flotation member is restricted due to the body pressure sensor at the top, which causes a problem in that the patient's body pressure cannot be sufficiently distributed.

In relation to this, Patent Document 2 and Patent Document 3 disclose a structure in which a pressure sensor is placed in each sector that causes levitation. However, when the number of sensors equal to the number of sectors is provided, there is a problem of increased manufacturing costs due to the complexity of the connection structure and increase in data processing amount.

In addition, because the size of one sector is relatively large for the placement of the pressure sensor, compared to the case where the sector is formed small, it cannot sufficiently follow and support the curves of the user's body, causing discomfort to the user. .

In another aspect, Patent Document 2 and Patent Document 3 use a pressure sensor made of a conventional electronic device. However, pressure sensors based on electronic devices provide the user with a foreign body sensation, which not only causes discomfort to the user but may even worsen bedsores. To prevent this, you can consider placing a cushion on top of the pressure sensor, but there is a problem in that the cushion reduces the sensitivity of the pressure sensor.

In other words, while the conventional mattress for preventing bedsores using a pressure sensor requires the pressure sensor to be placed relatively high due to its purpose, purpose, and unique structure, paradoxically, the pressure sensor hinders the feeling of use or causes pressure ulcers. The current situation is that the flotation function for prevention is not faithfully provided.

Accordingly, the problem to be solved by the present invention is to provide a mattress for preventing bedsores that reduces manufacturing costs and improves user convenience despite the fact that the body pressure sensor is placed on the upper part of the flotation member.

Another problem to be solved by the present invention is to provide a method for controlling the mattress.

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

An anti-bedsore mattress according to an embodiment of the present invention for solving the above problems includes a plurality of embossed cells repeatedly arranged along at least one direction and controlled independently of each other; and a pressure sensor layer disposed on top of the plurality of embossed cells.

The pressure sensor layer may include a plurality of conductive patterns extending in a plurality of directions intersecting the one direction.

The conductive pattern includes a plurality of first conductive patterns and second conductive patterns that intersect the first conductive patterns, and at least some of the plurality of intersections of the first conductive patterns and the second conductive patterns are embossed. Can non-overlap with cells.

The pressure sensor layer includes a first electrode pattern layer including a first conductive pattern extending along a first pattern direction intersecting the one direction, and a second pattern direction intersecting the one direction and the first pattern direction. It may include a second electrode pattern layer including an extended second conductive pattern, and a conductive layer interposed between the first electrode pattern layer and the second electrode pattern layer.

Additionally, one first conductive pattern and/or one second conductive pattern may be arranged to overlap a plurality of embossed cells.

The pressure sensor layer may be a woven or knitted fabric of fibers.

In this case, the expansion rate of the pressure sensor layer may be 10% or more and 50% or less.

Any of the emboss cells may be configured to form a first levitation height in an initial state, a second levitation height higher than the first levitation height, and a third levitation height lower than the first levitation height.

The vertical distance difference between the second floating height, that is, the maximum floating height, and the third floating height, that is, the minimum floating height, may be 3 cm to 5 cm.

The pressure sensor layer may be at least partially fixed to the emboss cells so that the pressure sensor layer is bent while the plurality of emboss cells perform a levitation operation independently of each other.

The control method of a bedsore mattress according to an embodiment of the present invention for solving the above other problems is a control method performed by a processor, and is a control method that lifts one or more emboss cells based on the user's body pressure distribution detected by the pressure sensor layer. Includes height control.

The pressure sensor layer detects the intensity of pressure applied at one or more specific locations, and in the intensity of pressure at a plurality of locations over time, if the integrated value exceeds a predetermined first standard, the emboss cell Transformation can begin.

In addition, the pressure sensor layer detects the intensity of pressure applied at one or more specific locations, and controls the levitation height of the emboss cell based on the intensity of pressure at the location over time during a predetermined time period. This may include controlling the integral value to be within the second standard.

The pressure sensor layer detects the intensity of pressure applied at specific positions including a first position and a second position adjacent to each other, and controls the levitation height of the emboss cell over time, during a predetermined time period. In terms of the intensity of pressure at a certain location, the method may include controlling the difference between the integral value at the first location and the integral value at the second location to be within a range of 10%.

The pressure sensor layer detects the intensity of pressure applied at specific positions including a first position and a second position adjacent to each other, and controls the levitation height of the emboss cell over time, during a predetermined time period. In terms of the intensity of the pressure at any position according to the control, the integral value at the first position is controlled so that it is within the second standard, but the second position is not controlled despite the standard, and the integral value at the first position is When the third standard lower than the second standard is reached, the integrated value at the first position is controlled to gradually increase, and when the integrated value at the first position reaches the third standard lower than the second standard, the integrated value at the first position is controlled to gradually increase. It may include controlling the integral value at position 2 to be within the second standard.

In the initial state, an emboss cell has a first levitation height, and controlling the emboss cell's levitation height includes raising it to a second levitation height higher than the first levitation height, and/or It may include lowering to a lower third flotation height.

Specific details of other embodiments are included in the detailed description.

According to embodiments of the present invention, it includes a fiber-based pressure sensor layer disposed on a plurality of repeatedly arranged emboss cells to follow the user's body and facilitate levitation without providing a foreign body sensation to the user. can do.

In addition, the pressure sensor layer can be bent along the floating height of the emboss cell, so that, for example, when the emboss cell descends, the sensed pressure is lowered, and when the emboss cell rises, the sensed pressure can be increased. This can change the user's body pressure distribution. can be detected more precisely.

In addition, the pressure sensor layer may have sufficient elasticity, for example, a high elasticity rate, so that the lifting or lowering of the emboss cells may not interfere with the lifting of the user's body despite the pressure sensor layer.

In particular, when the pressure sensor layer includes a conductive pattern, damage or breakage of the conductive pattern portion can be minimized by intersecting or staggering the arrangement directions of the conductive pattern and the embossed cells.

Effects according to embodiments of the present invention are not limited to the contents exemplified above, and further various effects are included in the present specification.

Figure 1 is an exploded perspective view of an anti-bedsore mattress according to an embodiment of the present invention.
Figure 2 is a plan layout showing the embossing layer and pressure sensor layer of Figure 1.
Figure 3 is an exploded perspective view of the pressure sensor layer of Figure 1.
Figure 4 is a schematic diagram showing the weaving state of the first electrode pattern layer of Figure 3.
Figure 5 is a schematic diagram showing the weaving state of the second electrode pattern layer of Figure 3.
Figure 6 is a cross-sectional schematic diagram showing the initial state of the embossed cells of the bedsore prevention mattress of Figure 1.
Figures 7 and 8 are cross-sectional schematic diagrams showing the levitation of embossed cells in the first state and the second state, respectively.
Figure 9 is a plan layout showing the embossing layer and the pressure sensor layer of a pressure ulcer prevention mattress according to another embodiment of the present invention.
Figure 10 is a plan layout showing the embossed layer and pressure sensor layer of a pressure ulcer prevention mattress according to another embodiment of the present invention.
Figure 11 is a flowchart showing a control method of an anti-bedsore mattress according to an embodiment of the present invention.
Figures 12 to 15 are graphic schematic diagrams for explaining a control method of an anti-bedsore mattress according to an embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms, and only the embodiments serve to ensure that the disclosure of the present invention is complete, and those skilled in the art It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims. That is, various changes may be made to the embodiments presented by the present invention. The embodiments described below are not intended to limit the embodiments, but should be understood to include all changes, equivalents, and substitutes therefor.

The size, thickness, width, length, etc. of components shown in the drawings may be exaggerated or reduced for convenience and clarity of explanation, so the present invention is not limited to the form shown.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined.

Spatially relative terms such as 'above', 'upper', 'on', 'below', 'beneath', and 'lower' are used in the drawing. As shown, it can be used to easily describe the correlation between one element or component and other elements or components. Spatially relative terms should be understood as terms that include different directions of the element when used in addition to the direction shown in the drawings. For example, when an element shown in a drawing is turned over, an element described as 'below or beneath' another element may be placed 'above' the other element. Accordingly, the illustrative term 'down' may include both downward and upward directions.

As used herein, 'and/or' includes each and every combination of one or more of the mentioned items. Additionally, the singular form also includes the plural form unless specifically stated in the phrase. As used herein, 'comprises' and/or 'comprising' do not exclude the presence or addition of one or more other components in addition to the mentioned components. The numerical range expressed using 'to' indicates a numerical range that includes the values written before and after it as the lower limit and upper limit, respectively. ‘About’ or ‘approximately’ means a value or numerical range within 20% of the value or numerical range stated thereafter.

In this specification, when referring to components, ordinal modifiers such as 'first component', 'second component', '1-1 component', etc. are used to distinguish one component from another component. It just happens. Accordingly, the first component referred to below may be referred to as the second component within the scope of the technical idea of the present invention. For example, what is referred to as a first component in one embodiment may be referred to as a second component in another embodiment. Also, of course, what is referred to as a first component in the description of the invention may be referred to as a second component in the claims.

In this specification, the first direction (X) refers to any direction, and the second direction (Y) refers to another direction that intersects or is perpendicular to the first direction (X) in a plane. Additionally, the third direction (Z) refers to another direction that intersects or is perpendicular to the plane.

Additionally, the first direction (X) and the second direction (Y) may each be parallel to the horizontal direction, and the third direction (Z) may be parallel to the direction of gravity, but the present invention is not limited thereto.

Unless otherwise defined, 'plane viewpoint' means a viewpoint viewed in a direction perpendicular to and parallel to the plane to which the first direction (X) and the second direction (Y) belong. Additionally, unless otherwise defined, 'overlapping in one direction' means that a plurality of components are overlapped and arranged when viewed in a direction parallel to the one direction.

Unless otherwise defined herein, the term 'fiber' or 'thread' or 'yarn or thread' refers to a natural or artificial long, thin fibrous polymer material, consisting of a single strand or multiple continuous sheets. It can be used to include filaments, which are long fibers, and staples, which are made by twisting short single fibers together.

Additionally, unless otherwise defined, the terms 'conductive yarn', 'conductive yarn', or 'conductive fiber' collectively refer to fiber materials that have electrical conductivity or thermal conductivity, and include a combination of only conductive fibers, or a combination of conductive fibers and non-conductive fibers. , or non-conductive wire plated with a conductive material.

Hereinafter, the present invention will be described in detail with reference to the attached drawings.

Figure 1 is an exploded perspective view of an anti-bedsore mattress according to an embodiment of the present invention. Figure 2 is a plan layout showing the embossing layer and pressure sensor layer of Figure 1. Figure 3 is an exploded perspective view of the pressure sensor layer of Figure 1. Figure 4 is a schematic diagram showing the weaving state of the first electrode pattern layer of Figure 3. Figure 5 is a schematic diagram showing the weaving state of the second electrode pattern layer of Figure 3.

1 to 5, the pressure ulcer prevention mattress 11 according to this embodiment includes an embossed layer 100 and a pressure sensor layer 200 disposed on the embossed layer 100, and a pressure sensor layer ( It may further include a cover layer 300 disposed on 200).

The embossing layer 100 may include a base portion 101 and a plurality of embossing cells 110 disposed on the base portion 101. The embossed cells 110 may have a shape that protrudes from the base portion 101. The base portion 101 may refer to a portion that at least partially connects the plurality of embossed cells 110.

The plurality of embossed cells 110 may form an embossed surface protruding from the base portion 101. The embossed cell 110 may function like an air cell or air cushion by trapping air, etc. therein. Each embossed cell 110 may be made of a material with elasticity capable of elastic deformation. For example, each emboss cell 110 may expand or contract independently of each other depending on the amount of air injected into the emboss cell 110. Accordingly, the embossed cell 110 can partially change the height of the surface of the embossed layer 100, that is, the floating height. That is, the embossed cells 110 support the user and function as a flotation member to levitate the user's body at a specific location, and each embossed cell 110 can define a sector, which is the minimum area defining the flotation area. In the initial state, the embossed cell 110 may have an approximately hemispherical shape with a partially recessed upper portion, but the present invention is not limited thereto.

Although not shown in the drawing, there is a pump (not shown) inside the base portion 101 for injecting air into the interior of each emboss cell 110 or sucking air to control the floating height of the emboss cell 110. However, the present invention is not limited thereto. In other embodiments, the base portion 101 may be omitted. Or, in another embodiment, the air pump may be disposed outside of the embossed layer 100.

From a plan view, the embossed cells 110 may be arranged approximately regularly. In an exemplary embodiment, the embossed cells 110 may be arranged regularly along the first direction (X) and the second direction (Y), forming an approximate matrix arrangement. Here, the first direction ( Direction (Y) may refer to the direction forming the corners of the rectangle.

1 and the like illustrate a case in which 6 emboss cells 110 are provided in the first direction (X) and 10 in the second direction (Y), for a total of 60 emboss cells 110, but the present invention Of course, it is not limited to this.

The pressure sensor layer 200 may be disposed on one side of the embossed layer 100 in the third direction (Z), for example, on the upper side. The pressure sensor layer 200 may be disposed closer to the user than the embossed layer 100 including the embossed cells 110 that perform a levitation function for each of the plurality of sectors. That is, when the user lies down on the pressure ulcer prevention mattress 11, the pressure sensor layer 200 may be interposed between the embossed layer 100 and the user.

The pressure sensor layer 200 includes a plurality of conductive patterns 210a and 220a extending in a plurality of directions and can detect the presence and/or intensity of pressure applied at a predetermined location on a plane. In an exemplary embodiment, the pressure sensor layer 200 may include a first electrode pattern layer 210 and a second electrode pattern layer 220 facing away from each other, and a conductive layer 250 interposed therebetween. .

The first electrode pattern layer 210 extends in the first direction (X) and may include a plurality of first conductive patterns 210a in the shape of a stripe pattern arranged to be spaced apart in the second direction (Y). A portion between two adjacent first conductive patterns 210a may not have electrical conductivity.

The first electrode pattern layer 210 may be entirely made of a fiber material. For example, the first electrode pattern layer 210 may be a woven fabric of fibers. Specifically, the first electrode pattern layer 210 includes the 1-1 fiber yarns 211 extending in the first direction (X) and the 1-2 fiber yarns 212 extending in the second direction (Y). It may be woven. Figure 4 illustrates a case where the 1-1 fiber yarn 211 and the 1-2 fiber yarn 212 are woven by crossing each other one by one, but of course, the present invention is not limited thereto. The 1-1st fiber yarn 211 and the 1-2nd fiber yarn 212 may each be implemented as a filament or a spun yarn in which a plurality of filaments are twisted together.

The 1-1 fiber yarn 211 may include a 1-1 conductive yarn 211a and a 1-1 non-conductive yarn 211b. At this time, the area occupied by the plurality of 1-1 conductive yarns 211a arranged adjacent to each other in the second direction (Y) may form a first conductive pattern 210a extending in the first direction (X). . On the other hand, the area occupied by the 1-1 non-conductive fibers 211b may form an area where the first conductive pattern 210a is not located, that is, the first non-conductive area 210b.

Meanwhile, the first-second fiber yarn 212 may be a non-conductive yarn. For example, the 1-2 fiber yarns 212 extending in the second direction (Y) for weaving the first electrode pattern layer 210 may be made of only non-conductive yarns. Since the 1-2 fiber yarn 212 has electrical nonconductivity, it is possible to prevent the 1-1 conductive yarns 211a spaced apart in the second direction (Y) from conducting directly to each other.

The first conductive pattern 210a of the first electrode pattern layer 210 may be exposed through both the upper and lower surfaces of the first electrode pattern layer 210. That is, the first conductive pattern 210a of the first electrode pattern layer 210 may exhibit electrical conductivity on both the top and bottom surfaces.

The second electrode pattern layer 220 may be disposed on the first electrode pattern layer 210 . The second electrode pattern layer 220 may be entirely made of a fiber material. For example, the second electrode pattern layer 220 may be a woven fabric of fibers. Specifically, the second electrode pattern layer 220 is composed of the 2-1 fiber yarn 221 extending in the first direction (X) and the 2-2 fiber yarn 222 extending in the second direction (Y). It may be woven. Figure 5 illustrates a case where the 2-1 fiber yarn 221 and the 2-2 fiber yarn 222 are woven by crossing each other one by one, but of course, the present invention is not limited thereto. The 2-1st fiber yarn 221 and the 2-2nd fiber yarn 222 may each be implemented as a filament or a spun yarn in which a plurality of filaments are twisted together.

The 2-1 fiber yarn 221 may be a non-conductive yarn. For example, the 2-1 fiber yarns 221 extending in the first direction (X) for weaving the second electrode pattern layer 220 may be made of only non-conductive yarns. Since the 2-1st fiber yarn 221 has electrical non-conductivity, it is possible to prevent the 2-2nd conductive yarns 222a spaced apart in the first direction (X), which will be described later, from directly conducting to each other.

The 2-2 fiber yarn 222 may include a 2-2 conductive yarn 222a and a 2-2 non-conductive yarn 222b. At this time, the area occupied by the plurality of 2-2 conductive yarns 222a arranged adjacent to each other in the first direction (X) may form a second conductive pattern 220a extending in the second direction (Y). . On the other hand, the area occupied by the 2-2 non-conductive fibers 222b may form an area where the second conductive pattern 220a is not located, that is, the second non-conductive area 220b.

The second conductive pattern 220a of the second electrode pattern layer 220 may be exposed through both the upper and lower surfaces of the second electrode pattern layer 220. That is, the second conductive pattern 220a of the second electrode pattern layer 220 may exhibit electrical conductivity on both the top and bottom surfaces.

The method of implementing the conductive yarns forming the above-described first conductive pattern 210a and/or the second conductive pattern 220a, that is, the 1-1 conductive yarn 211a and the 2-2 conductive yarn 222a, is particularly limited. For example, metal thread made from thinly drawn metal, filament made from thinly drawn synthetic fibers, or plated thread coated or plated with a conductive material on the surface of spun yarn, conductive thread with a conductive material embedded inside a synthetic fiber, and synthetic fibers. Covering yarns in which conductive fibers are wrapped around fibers, etc., and/or yarns in which conductive yarns and non-conductive yarns are twisted together can be used. In addition, the above-described non-conductive yarns, such as the 1-1 non-conductive yarn (211b), the 1-2 fiber yarn (212), the 2-1 fiber yarn (221) and/or the 2-2 non-conductive yarn (222b) may be made of a fiber yarn with excellent elasticity, such as nylon, but the present invention is not limited thereto.

A conductive layer 250 may be interposed between the first electrode pattern layer 210 and the second electrode pattern layer 220. The conductive layer 250 may be configured to at least partially contact the first electrode pattern layer 210 and/or the second electrode pattern layer 220. The conductive layer 250 may be entirely made of a fiber material. For example, although not shown in the drawing, the conductive layer 250 may be a woven material of conductive yarns extending in the first direction (X) and conductive yarns extending in the second direction (Y). Accordingly, the conductive layer 250 can transmit an electrical signal in the third direction (Z). That is, the electrical signal flowing along the first conductive pattern 210a of the first electrode pattern layer 210 is transmitted to the second conductive pattern 220a, or the second conductive pattern 220a of the second electrode pattern layer 220 is transmitted. ) can be transmitted to the first conductive pattern 210a.

The plurality of first conductive patterns 210a and the plurality of second conductive patterns 220a described above may intersect each other and form a grid or coordinates. When pressure is applied to a predetermined position from the top of the pressure sensor layer 200, that is, the top of the second electrode pattern layer 220, the first conductive pattern 210a and the second conductive pattern 220a near the position where the pressure was applied. In this crossing area, the first conductive pattern 210a and the second conductive pattern 220a may be electrically connected to each other via the conductive layer 250. Based on this, the pressure sensor layer 200 can measure the location where pressure is applied and the intensity of the pressure. That is, the pressure sensor layer 200 according to this embodiment is a resistive pressure sensor that measures the intensity of pressure through a change in resistance of the current path flowing between the first conductive pattern 210a and the second conductive pattern 220a. You can.

For example, when pressure is applied at a certain location, the second conductive pattern 220a of the second electrode pattern layer 220 is at least partially bent, compressed, or comes into close contact with the conductive layer 250 and the second conductive layer. The pattern 220a and the first conductive pattern 210a may contact each other. At this time, the resistance to the flow of current can be measured to be relatively low.

For another example, in a position where no pressure is applied, the first conductive pattern 210a and/or the second conductive pattern 220a do not contact the conductive layer 250, have a small contact area, or are in sufficiently close contact with the conductive layer 250. If the current does not flow, the current may not flow, or even if the current does flow, the amount of current may be extremely small. In this case, the resistance to the flow of current can be measured to be relatively large.

For another example, when a weak level of pressure is applied at a certain location, the contact area between the conductive layer 250 and the first conductive pattern 210a and the second conductive pattern 220a may not be sufficient, and the aforementioned pressure may not be sufficient. A higher resistance may be measured than at the applied position, but a lower resistance may be measured than at a position where no pressure is applied.

Meanwhile, in relation to determining the location where pressure is applied using the first conductive pattern 210a and the second conductive pattern 220a forming a grid, one of the conductive patterns, for example, the second conductive pattern 220a A scan signal may be applied to . The scan signal may refer to a signal that sequentially and repeatedly transmits current to a plurality of spaced apart second conductive patterns 220a during one frame. For example, if there are five second conductive patterns 220a and the unit frame is 0.5 seconds, a scan signal may be applied to each of the second conductive patterns 220a for 0.1 second.

Additionally, the first conductive patterns 210a may be electrically connected to the resistance measurement unit. Through this, it can be configured to detect that a scan signal or current applied to any second conductive pattern 220a flows through the first conductive pattern 210a and measure the change in resistance.

In this way, the pressure sensor layer 200 according to this embodiment can cause a change in the amount of current or resistance depending on the degree of pressure applied to each position on the plane, and based on this, the pressure applied to each position on the plane is You can create a profile. As a non-limiting example, when implemented in the form of a mattress on which a user can lie down, as in this embodiment, a body pressure distribution profile of the user in a lying state can be generated.

In some embodiments, the resistance of the conductive yarns 211a and 222a used in the first electrode pattern layer 210 and/or the second electrode pattern layer 220 may be less than the resistance of the conductive yarns used in the conductive layer 250. You can. The first conductive pattern 210a and the second conductive pattern 220a, which are used to determine the location where a current signal for detecting pressure is applied or pressure is applied, are made of a conductive thread with relatively high electrical conductivity, and are interposed between them. The conductive layer 250, which causes a direct change in resistance depending on the degree of compression, thickness, contact area, etc., can be made of a material with relatively low electrical conductivity and high resistance to achieve higher pressure sensing sensitivity.

Although not shown in the drawing, the pressure sensor layer 200 may further include a first insulating layer (not shown) and/or a second insulating layer (not shown). The first insulating layer is disposed below the first electrode pattern layer 210, and the second insulating layer is disposed above the second electrode pattern layer 220 to prevent unintended electrical flow.

Additionally, the pressure sensor layer 200 may be at least partially fixed on at least some of the embossed cells 110. That is, the lower part of the pressure sensor layer 200 is at least partially fixed to the emboss cell 110 so that the pressure sensor layer 200 follows the surface of the emboss layer 100 as the emboss cell 110 expands and/or contracts. It can be configured to follow. If the pressure sensor layer 200 does not move downward along the emboss cell 110 and maintains its height despite the contraction of any emboss cell 110, inaccurate pressure is continuously detected and the emboss cell 110 It may interfere with the control of (110) or function as a noise signal. This will be described later along with FIG. 7 and the like.

Meanwhile, the conventional bedsore prevention mattress equipped with a pressure sensor attempted to measure body pressure mainly using a plurality of pressure sensors disposed on each flotation member. However, collecting data from multiple pressure sensors deployed from dozens to hundreds of pressure sensors had problems such as excessive data processing requirements. However, the above problem can be solved by disposing one fiber-based pressure sensor layer 200 across a plurality of emboss cells 110 as in the present invention.

That is, the pressure sensor layer 200 according to this embodiment is, as a non-limiting example, a total of 45 intersections or pressure detection points, including 9 first conductive patterns 210a and 5 second conductive patterns 220a. Although this point can be implemented, 14 data collection lines can be formed instead of 45 data collection lines.

In addition, unlike the prior art, it is possible to provide a pressure sensor layer 200 with excellent flexibility and usability based on fiber, and even when the pressure sensor layer 200 is placed on top of the embossed layer 100, there is no inconvenience in use for the user. may not cause.

Above all, in the conventional case, one of the reasons why the pressure sensor could not be placed at the top across a plurality of floating members and a separate pressure sensor was placed for each floating member is that the operation of the floating member by the pressure sensor layer, such as the emboss cell ( This was because the expansion of 110) was interfered with. Specifically, when some of the emboss cells 110 expand and other emboss cells adjacent to the expanded emboss cells contract, a height difference between the upper surfaces of adjacent emboss cells may be formed to a significant extent. At this time, the conventional pressure sensor did not have elasticity, so there were problems such as the expansion of the embossed cell being hindered, or the pressure sensor being damaged due to the expansion/contraction of the embossed cell.

However, the pressure sensor layer 200 of the bedsore prevention mattress 11 according to this embodiment is made of a fiber material and has high flexibility, capable of bending or folding, and has high elasticity. As a non-limiting example, the stretch ratio of the pressure sensor layer 200 including the first electrode pattern layer 210 and the second electrode pattern layer 220 according to this embodiment may be about 10% or more and 50% or less. . In this specification, the term 'stretch rate' refers to the maximum stretched length that can be restored to its original length without being destroyed when stretched in any direction from the initial state.

In addition, the pressure sensor layer 200 according to this embodiment has at least some or all of the intersection points formed by the plurality of first conductive patterns 210a and the plurality of second conductive patterns 220a when viewed from a plan view, or an emboss cell ( 110) and may be arranged non-overlapping in the third direction (Z). Furthermore, in some embodiments, at least some or all of the first conductive pattern 210a and/or the second conductive pattern 220a may be disposed to non-overlap with the embossed cell 110 in the third direction (Z). .

As described above, one of the problems that occurs when placing the pressure sensor layer 200 on a floating member, for example, the emboss cell 110, is that expansion of the emboss cell 110 is hindered by the pressure sensor layer 200. , or the problem is that the pressure sensor layer 200 is damaged due to expansion and/or contraction of the embossed cell 110. At this time, the present invention solves the above problem by forming the pressure sensor layer 200 with a fiber material to provide elasticity, and at the same time, the first conductive pattern 210a and/or the second conductive pattern 220a, at least the first conductive pattern 210a, The durability of the pressure sensor layer 200 can be further improved by arranging the intersection of the first conductive pattern 210a and the second conductive pattern 220a in a staggered manner so that they do not overlap with the embossed cell 110.

In other words, while non-conductive yarns can use fiber yarns with relatively high elasticity, in the case of conductive yarns, the elasticity may be relatively low due to the limited material. At this time, when the first conductive pattern 210a and the second conductive pattern 220a, that is, the conductive yarns forming them, are subjected to strong tension or tension due to the expansion of the embossed cell 110, the first conductive pattern 210a Damage may occur in the pattern 210a and the second conductive pattern 220a.

Accordingly, the pressure ulcer prevention mattress 11 according to the present embodiment is arranged so that the first conductive pattern 210a and/or the second conductive pattern 220a, at least their intersection points, are at least partially non-overlapping with the embossed cell 110. The tension on challengers can be alleviated.

At the same time, as described above, each emboss cell 110 defines a sector for levitation of the user's body, and levitation of the user's body may occur at a location corresponding to the emboss cell 110. At this time, the intersection point of the first conductive pattern 210a and the second conductive pattern 220a, which directly contributes to detecting the position of pressure, overlaps the emboss cell 110 in the third direction (Z) and forms the upper part of the emboss cell 110. When located, for example, when an emboss cell 110 is completely contracted and the emboss cell 110 and the user's body are completely spaced apart, a problem may occur in which no pressure is sensed at that location.

However, according to the present embodiment, even when any emboss cell 110 is completely contracted, the intersection point is not located directly on top of the contracted emboss cell 110, but is shifted in the horizontal direction to a position, for example, the nearest emboss cell ( By being positioned between 110) and the emboss cell, certain pressure detection can still be performed.

Meanwhile, the cover layer 300 may be a cover layer or a surface layer located at the top of the bedsore prevention mattress 11 and visible from the outside of the bedsore prevention mattress 11. The cover layer 300 may be made of a material with relatively excellent durability. 1 and the like illustrate a case where the cover layer 300 is disposed on the upper part of the pressure sensor layer 200, but the cover layer 300 is also disposed on the lower part of the embossed layer 100, or the embossed layer 100 and may be arranged to surround the pressure sensor layer 200.

Hereinafter, the operation of the emboss cells 110 will be described in more detail with further reference to FIGS. 6 to 8. Figure 6 is a cross-sectional schematic diagram showing the initial state of the embossed cells of the bedsore prevention mattress of Figure 1. Figures 7 and 8 are cross-sectional schematic diagrams showing the levitation of embossed cells in the first state and the second state, respectively. For convenience of explanation, the cover layer 300 is omitted in FIGS. 6 to 8 .

First, referring further to FIG. 6, the bedsore prevention mattress 11 according to this embodiment is in its initial state, that is, in a state before the embossed cells 110 start operating, the embossed cells 110 are approximately at the first floating height ( H1) can be formed. The first levitation height H1 may be formed by injecting a predetermined amount of air into the emboss cell 110.

Next, referring further to FIG. 7 , as a predetermined pressure is detected by the pressure sensor layer 200, a control unit (not shown) may control the emboss cell 110.

In an exemplary embodiment, the plurality of emboss cells 110 include a first emboss cell 110a, a second emboss cell 110b, and a third emboss cell 110c that are closest to each other, and the first emboss cell 110a ) and the third embossed cell (110c) may expand to form a second floating height (H2) that is higher than the first floating height (H1). At this time, the second buoyancy height (H2) may be the maximum inflation height or the maximum buoyancy height, but the present invention is not limited thereto. In this specification, the term 'most adjacent' means that between two components that are classified or referred to as the same, another component that is also classified or referred to as the same is not located. In other words, it includes cases where different types of components are located between two components that are classified or referred to the same way.

At this time, the maximum pressure is detected according to the curvature of the user's body, or in the vicinity of the second emboss cell (110b) where the degree of pressure is the most severe, the first emboss cell (110a) and the third emboss cell (110c) that are closest on both sides are By forming the second floating height (H2), the user's body is at least partially spaced from the second embossed cell (110b) to relieve strong pressure near the second embossed cell (110b) and reduce the weight of the user's body to the first embossed cell (110b). It can be roughly distributed across the embossing cells 110a, the second embossing cells 110b, and the third embossing cells 110c.

Meanwhile, the pressure sensor layer 200 is pushed up by the expanded first emboss cell 110a and the third emboss cell 110c, or the first emboss cell 110a and/or the third emboss cell 110c. As described above, it is configured to be partially fixed and bent.

Next, referring further to FIG. 8, the first embossing cell 110a and the third embossing cell 110c are contracted to a predetermined degree to form the first lifting height H1 again, and the second embossing cell 110b is It can be completely contracted to form a third floating height (H3) that is lower than the first floating height (H1). At this time, the third floating height (H3) may be the minimum shrinkage height or the minimum floating height, but the present invention is not limited thereto.

As previously described with FIG. 7, when the location where the strongest pressure is applied to the user's body, for example, the vicinity of the second emboss cell (110b) is detected, another adjacent first emboss cell ( 110a) and the third emboss cell 110c can be expanded, and the second emboss cell 110b at the corresponding position can be contracted as shown in FIG. 8. Through this, the user's body is at least partially separated from the second emboss cell (110b) to relieve strong pressure near the second emboss cell (110b) and the weight of the user's body is transferred to the first emboss cell (110a) and the second emboss cell (110a). It can be roughly distributed across the cell 110b and the third embossed cell 110c.

Meanwhile, as described above, the pressure sensor layer 200 is partially fixed to the second embossed cell 110b, whose upper surface is lowered due to shrinkage, and is bent to the upper surface height level of the second embossed cell 110b.

That is, in the pressure ulcer prevention mattress 11 according to the present embodiment, in the initial state, the embossed cells 110 are expanded to a predetermined degree, that is, forming a first floating height H1, and the pressure sensor layer 200 Based on the pressure detection result, at least some of the emboss cells 110 are expanded to form a second levitation height H2, and/or at least a portion of the emboss cells 110 are contracted to form a third levitation height H3. It can be formed to distribute the user's weight. In order to differentiate and explain the concept, the cases of FIGS. 7 and 8 were explained separately, but as necessary, some of the plurality of embossed cells 110 form the first levitation height H1, and other portions form the second levitation height. (H2), and another part may form a third floating height (H3).

Conventional pressure ulcer prevention mattresses form a maximum flotation height in the initial state and then lower the flotation member as needed, or form a minimum flotation height in the initial state and then raise the flotation member as needed. However, conventional pressure ulcer prevention mattresses had limitations in that they caused a large foreign body sensation during use and did not provide sufficient cushioning.

In the initial state as in this embodiment, the first levitation height (H1) is formed between the maximum levitation height, that is, the second levitation height (H2) and the minimum levitation height, that is, the third levitation height (H3), but the emboss cell ( In the process of controlling 110), the emboss surface height can be raised as in the second flotation height (H2), or the emboss surface height can be lowered as in the third flotation height (H3) to increase the feeling of use and to reduce the curvature of the user's body. Accordingly, more precise tracking may be possible. In particular, as described above, because the pressure sensor layer 200 has high elasticity, the vertical distance difference between the second flotation height (H2), which is the maximum flotation height, and the third flotation height, which is the minimum flotation height, is at the level of 3 cm to 5 cm. Even in this case, damage to the pressure sensor layer 200 may not be caused.

In addition, conventional pressure ulcer prevention mattresses are not controlled based on the actual user's body pressure distribution profile, but simply have two types of flotation members alternately repeating the flotation motion, making it difficult to show a significant effect in preventing pressure ulcers. However, according to the present embodiment, instead of simply performing a repetitive floating operation based on the user's body pressure distribution profile using the pressure sensor layer 200, the pressure ulcer is prevented by operating according to a control method unique to the present invention, as will be described later. Or, the treatment effect of bedsores may be improved.

Hereinafter, other embodiments of the present invention will be described. However, the description of the same or extremely similar configuration as the above-described embodiment will be omitted, and this will be clearly understood by those skilled in the art from the attached drawings.

Figure 9 is a plan layout showing the embossed layer and pressure sensor layer of a pressure ulcer prevention mattress according to another embodiment of the present invention, and is a layout showing the positions corresponding to Figure 2.

Referring to FIG. 9, the pressure ulcer prevention mattress 12 according to this embodiment includes an embossed layer including an embossed cell 110, a plurality of first conductive patterns 210a and a plurality of second conductive patterns 220a crossing each other. ) and a cover layer (not shown), where at least some of the intersection points of the first conductive pattern 210a and the second conductive pattern 220a overlap the embossed cell 110. This is different from the embodiment according to Figure 2 described above.

From a plan view, the embossed cells 110 may be arranged approximately regularly. In an exemplary embodiment, the embossed cells 110 may be arranged regularly along the first direction (X) and the second direction (Y), forming approximately a matrix arrangement.

Additionally, each first conductive pattern 210a may extend in the first pattern direction PD1, and the plurality of first conductive patterns 210a may be spaced apart from each other in the second pattern direction PD2. Additionally, each second conductive pattern 220a may extend in the second pattern direction PD2, and the plurality of second conductive patterns 220a may be spaced apart from each other in the first pattern direction PD1.

At this time, the first pattern direction PD1 is a direction that intersects both the first direction (X) and the second direction (Y), and the second pattern direction (PD2) is a direction that intersects both the first direction (X) and the second direction (Y). ) It may be in a direction that intersects with both.

The bedsore prevention mattress 12 according to the present embodiment is different from the above-described embodiments such as FIG. 2, the arrangement direction of the plurality of embossed cells 110 and the first conductive pattern 210a and/or the second conductive pattern 220a. ) is different at the point where they do not coincide and intersect. In this specification, the arrangement direction of the embossed cells 110 refers to the minimum unit arranged with the shortest separation distance.

Meanwhile, in some embodiments, at least some or all of the plurality of first conductive patterns 210a and/or second conductive patterns 220a overlap with at least one embossed cell 110 in the third direction (Z). can be placed. Furthermore, at least some or all of the intersections formed by the plurality of first conductive patterns 210a and the plurality of second conductive patterns 220a may be arranged to overlap the embossed cell 110 in the third direction (Z). . More specifically, one of the first conductive patterns 210a and/or one of the second conductive patterns 220a may be arranged to overlap the plurality of embossed cells 110.

The pressure ulcer prevention mattress according to the embodiment of FIG. 2 described above is configured so that the extension direction of the first conductive pattern and the second conductive pattern and the arrangement direction of the embossed cells 110 are approximately parallel, and the first conductive pattern and the second conductive pattern are configured to be substantially parallel. By arranging the intersection of the patterns to non-overlap with the emboss cells 110, the tension applied to the first and second conductive patterns of the pressure sensor layer during the expansion and/or contraction of the emboss cells 110 was alleviated.

On the other hand, the pressure ulcer prevention mattress 12 according to this embodiment is configured to intersect the extension direction of the first conductive pattern 210a and the second conductive pattern 220a and the arrangement direction of the embossed cells 110, so that the first conductive pattern (210a) Tension applied to 210a) and/or the second conductive pattern 220a may be alleviated. That is, the direction in which tension is applied according to the change in the floating height formed by the emboss cells 110 adjacent to each other according to the arrangement of the emboss cells 110 is the arrangement direction of the emboss cells 110, that is, the first direction (X) or the first direction (X). 2 It may be strongest in direction (Y). At this time, the first conductive pattern 210a and the second conductive pattern 220a, which have relatively small elasticity and are susceptible to damage due to tension, are formed to extend in a direction intersecting the first direction (X) and the second direction (Y). Thus, damage to the first conductive pattern 210a and the second conductive pattern 220a can be prevented.

Figure 10 is a plan layout showing the embossed layer and pressure sensor layer of a pressure ulcer prevention mattress according to another embodiment of the present invention, and is a layout showing the positions corresponding to Figure 2.

Referring to FIG. 10, the pressure ulcer prevention mattress 13 according to this embodiment includes an embossed layer including an embossed cell 110, a plurality of first conductive patterns 210a and a plurality of second conductive patterns 220a crossing each other. ) and a cover layer (not shown), wherein at least some of the intersections of the first conductive pattern 210a and the second conductive pattern 220a are arranged to overlap the embossed cell 110, This is different from the embodiment according to FIG. 9 in that the arrangement direction of the embossed cells 110 and a portion of the extension direction of the first conductive pattern 210a or the second conductive pattern 220a are substantially parallel.

From a plan view, the embossed cells 110 may be arranged approximately regularly. In an exemplary embodiment, the embossed cells 110 may be regularly arranged along the first cell direction CD1 and the second cell direction CD2. At this time, the first cell direction (CD1) is a direction that intersects both the first direction (X) and the second direction (Y), and the second cell direction (CD2) is a direction that intersects both the first direction (X) and the second direction (Y). ), for example, it may be a direction parallel to the first direction (X).

Additionally, the first conductive patterns 210a may each extend in the first direction (X) and be spaced apart in the second direction (Y). The second conductive patterns 220a may each extend in the second direction (Y) and be spaced apart in the first direction (X).

Meanwhile, in some embodiments, at least some or all of the plurality of first conductive patterns 210a and/or second conductive patterns 220a overlap at least one embossed cell 110 in the third direction (Z). can be placed. Furthermore, some of the intersections formed by the plurality of first conductive patterns 210a and the plurality of second conductive patterns 220a are arranged to overlap the embossed cells 110 in the third direction (Z), and other portions are disposed in the embossed cells 110. It may be arranged non-overlapping with (110) in the third direction (Z).

As in this embodiment, when the first conductive pattern 210a and the second conductive pattern 220a each extend in one direction and the embossed cells 110 are regularly arranged along at least two directions, the directions Even when some of them are formed to cross and other parts are formed in parallel, the tension applied to the first conductive pattern 210a and/or the second conductive pattern 220a can be alleviated.

Hereinafter, a method of controlling a pressure ulcer prevention mattress according to embodiments of the present invention will be described. The methods described below may be understood as being performed by a control unit (not shown) or a processor of the pressure ulcer prevention mattress, but the present invention is not limited thereto.

Figure 11 is a flowchart showing a control method of an anti-bedsore mattress according to an embodiment of the present invention.

Referring to FIG. 11, the control method according to the present embodiment includes a step of measuring or detecting the user's body pressure distribution using a pressure sensor layer (S100) and one or more emboss cells based on the location and intensity of the detected body pressure distribution or pressure. It includes a step (S200) of controlling the height of the float, such as expanding or contracting it.

Although not shown in the drawings, in some embodiments, the control method may further include transmitting at least one of the distribution result of the user's body pressure by the pressure sensor layer and the expansion/contraction state of the embossed cell to the server or user terminal.

As described above, control of the emboss cells may include expanding one or more emboss cells or contracting one or more emboss cells. At this time, control of the emboss cell can be achieved through air injection or air suction inside the emboss cell.

In addition, in the initial state, that is, in a state in which the user is not lying down on the pressure ulcer prevention mattress, the plurality of embossed cells may form a first floating height of approximately the middle level. In an exemplary embodiment, the control method according to the present embodiment may use the integral value of the intensity of pressure at one or a plurality of locations over time during a predetermined time period to initiate deformation or control of the emboss cell. there is. For this, further refer to Figure 12.

Figure 12 is a schematic graph showing the change in pressure measured at a specific location by the pressure sensor layer over a predetermined period of time from the initial state. In the model graphs below, the change in pressure can be roughly understood as being proportional to the buoyancy height of the emboss cell.

Referring further to FIG. 12, in the initial state, pressure may not be detected when the user is not lying down on the pressure ulcer prevention mattress. Afterwards, a predetermined pressure value can be detected from the moment (t1) when the user lies down on the pressure ulcer prevention mattress. The pressure ulcer prevention mattress according to this embodiment does not immediately perform the levitation operation of the emboss cell the moment a predetermined pressure is detected (t1), but starts the levitation operation of the emboss cell only after measuring the pressure for a predetermined time period. You can.

That is, the pressure is continuously measured for a predetermined time interval after the point in time when pressure detection starts (t1), and the integral value of the pressure intensity measured during the time interval, that is, the magnitude of pressure accumulated during the time interval (S1) If exceeds a predetermined first standard, a deformation operation of the embossed cell, for example, a lowering of the floating height of an embossed cell, may begin at that point t2.

A user, such as a bedridden patient, can lie on the pressure ulcer prevention mattress, but in some cases, situations may occur where non-human objects are placed or a guardian sits down for a moment. At this time, it may be inefficient to perform a flotation movement the moment pressure is detected on the pressure ulcer prevention mattress.

Alternatively, in the case where the user is a person of relatively low weight, bedsores may occur depending on the time the pressure is applied even if the pressure applied to a certain location, that is, the pressure applied to the unit area, is less than a predetermined standard. In particular, according to this embodiment, user convenience can be improved by controlling the emboss cells based on the accumulated pressure over time rather than controlling the emboss cells based on the pressure applied to the unit area.

Next, refer to FIGS. 13 and 14 for a more detailed explanation of how to control the height of the lift formed by the emboss cell. Figures 13 and 14 are schematic diagrams showing changes in pressure measured at a specific location by the pressure sensor layer over a predetermined period of time after control of the emboss cell is initiated.

Referring further to FIG. 13, when the emboss cell at the position corresponding to the pressure detection position is contracted, that is, the buoyancy height is lowered at the control start point (t2) of the emboss cell, the pressure detection value at that position may gradually decrease. there is. And at some point (t3), the minimum pressure (Pm) can be reached and maintained at that state. Figure 13 illustrates a case where the pressure Pm representing the minimum has a predetermined value, but in some cases, the corresponding pressure may not be detected.

In addition, in this specification, 'emboss cell at a position corresponding to the pressure detection position' refers to the pressure detection position, that is, the position when the intersection point of the conductive patterns overlaps the emboss cell, and the intersection point of the conductive patterns is the embossed cell. Even if it does not overlap with a cell, it refers to an embossed cell that is pre-designated as being very adjacent to the intersection and capable of responding.

At this time, it must be determined how long the minimum pressure (Pm) will be maintained. The control method according to this embodiment can control the integral value of the pressure intensity measured during a predetermined time period, that is, the amount of pressure (S2) accumulated during the time period to be within a predetermined range. Specifically, the amount of accumulated pressure (S2) can be maintained to be greater than the third standard and smaller than the second standard. Here, the second standard may be smaller than the above-described first standard.

If the cumulative value (S2) of the pressure measured during a predetermined time period retroactive from the current point (t4) gradually decreases and reaches the third standard, the deformation operation of the emboss cell at that point in time (t4), for example, which emboss cell The height of buoyancy can begin to rise.

Conventional floating bedsore prevention mattresses were limited to two floating members alternately floating according to a predetermined pattern. However, according to this embodiment, user convenience can be further improved by controlling the emboss cells based on the actual user's body pressure distribution.

Next, referring further to FIG. 14, when the emboss cell at the position corresponding to the pressure detection position is expanded, that is, when the levitation height is raised, at the time t4 of the emboss cell's levitation height rise, the pressure detection value at that position gradually increases. can do. And at some point (t5), a predetermined pressure (P) can be reached and maintained at that state.

At this time, it must be determined what pressure level the predetermined pressure (P) is. At this time, control from other nearby locations other than the location may be considered. Although the shape change of the emboss cell according to the pressure change is described above based on a certain position, in reality, the shape change of the emboss cell at multiple positions can be caused organically and simultaneously, and can occur at all points in the present embodiment. It may not be easy to meet the following control methods. Therefore, the method according to this embodiment can provide a control method adaptable to various environments by configuring the pressure level (P) after expanding the emboss cell to be dependent on the emboss cell control at another adjacent location.

Additionally, it must be determined for how long the predetermined pressure (P) will be maintained. The control method according to this embodiment can maintain the integral value S3 of the pressure intensity measured during a predetermined time period to be smaller than the second standard. If the cumulative value (S3) of the pressure measured during a predetermined time period retroactive from the current point (t6) gradually increases and reaches the second standard, the deformation operation of the emboss cell at that point in time (t6), for example, of which emboss cell You can start descending from the floating height.

In practice, the pressure change at a location may not necessarily be proportional to the lift height of the emboss cell corresponding to that location. That is, despite creating a sufficiently low lift height at a first location, if a second nearby location also creates a low lift height, or even creates a lower lift height, the minimum pressure may not be formed at the first location. there is. Nevertheless, through the above description, those skilled in the art will be able to understand the concept of the control method according to this embodiment of using the integral value of pressure over time.

Hereinafter, further reference will be made to FIG. 15 for further explanation of the control method of the pressure ulcer prevention mattress considering two points.

Referring further to FIG. 15, the intensity of the pressure measured at the first location and the pressure measured at the second location are detected, but the pressure measured at the first location may be applied with priority over the pressure measured at the second location. .

That is, when the emboss cell at the first position corresponding to the pressure detection position is contracted at the control start point (t2) of the emboss cell, the pressure detection value at the first position may gradually decrease. And at some point (t3), the minimum pressure (Pm) can be reached and maintained at that state.

And when the cumulative value (S2) of the pressure measured at the first location gradually decreases and reaches the third standard during a predetermined time interval retroactive from a certain current point in time (t4), the deformation operation of the emboss cell at that point in time (t4) , for example, can begin to increase the flotation height of a certain emboss cell. Through this, the integral value of the pressure at the first position can be maintained within a range between the third reference and the second reference.

Meanwhile, while the embossed cell at the position corresponding to the first position is controlled (t2 to t4), the embossed cell may not be controlled at the second position. For example, even if the pressure value accumulated during a predetermined time period at the second location exceeds the above-described first or second standard, the emboss cell at the location corresponding to the second location may not be controlled. In some embodiments, as the pressure value at the first location decreases, the pressure value at a second location adjacent to the first location may increase.

Then, when the accumulated pressure value (S2) measured at the first location reaches the third standard and the buoyancy height of the emboss cell begins to rise at some point (t4), the pressure is finally increased for a predetermined time period at the second location. The integral value of may be controlled to be maintained within a range between the third standard and the second standard. During this time, the emboss cell in the first position may not be controlled, or the emboss cell in the first position may expand to compensate for the pressure decrease in the second position, thereby increasing the pressure intensity.

Thereafter, the emboss cell corresponding to the first position and the emboss cell corresponding to the second position repeat the above-mentioned process and the levitation height is controlled, and the cumulative value of the pressure measured at the first position and the second position during a predetermined time period The difference in the cumulative value of pressure measured in can be controlled to be within a predetermined range. In an exemplary embodiment, the difference between the cumulative value of pressure at the first location and the cumulative value of pressure at the second location may be adjusted to be within a range of about 10%.

In the above, the description has been made focusing on the embodiments of the present invention, but this is only an example and does not limit the present invention, and those skilled in the art will understand the present invention without departing from the essential characteristics of the embodiments of the present invention. It will be apparent that various modifications and applications not illustrated above are possible.

Therefore, the scope of the present invention should be understood to include changes, equivalents, or substitutes of the technical ideas exemplified above. For example, each component specifically shown in the embodiments of the present invention can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

11: Mattress for preventing bedsores
100: Emboss layer
200: pressure sensor layer
300: Cover layer

Claims (13)

A plurality of emboss cells arranged repeatedly along at least one direction and controlled independently from each other; And a pressure sensor layer disposed on top of the plurality of emboss cells,
The pressure sensor layer is at least partially fixed to the emboss cell,
An anti-bedsore mattress with a pressure sensor layer that bends while the plurality of embossed cells perform a flotation motion independently of each other. A plurality of emboss cells arranged repeatedly along at least one direction and controlled independently from each other; And a pressure sensor layer disposed on top of the plurality of emboss cells,
The pressure sensor layer includes a plurality of first conductive patterns and second conductive patterns that intersect the first conductive patterns,
An anti-pressure mattress where at least some of the plurality of intersections of the first conductive patterns and the second conductive patterns do not overlap with the embossed cells. According to paragraph 1,
The pressure sensor layer is an anti-pressure mattress comprising a plurality of conductive patterns extending in a plurality of directions intersecting the one direction. According to paragraph 3,
A bedsore prevention mattress in which either the first conductive pattern or the second conductive pattern is arranged to overlap a plurality of embossed cells. According to claim 1 or 2,
The pressure sensor layer is a woven or knitted fabric of fiber,
An anti-bedsore mattress wherein the pressure sensor layer has an expansion rate of 10% or more and 50% or less. According to claim 1 or 2,
A pressure ulcer prevention mattress wherein the vertical distance difference between the maximum and minimum flotation heights of any of the embossed cells is 3 cm to 5 cm. delete As a control method carried out by the processor of an anti-bedsore mattress,
Including controlling the levitation height of one or more emboss cells based on the user's body pressure distribution detected by the pressure sensor layer,
The pressure sensor layer detects the intensity of pressure applied at one or more specific locations,
Controlling the levitation height of the emboss cell includes controlling the integral value of the intensity of pressure at the location over time for a predetermined time period to be within a second standard. According to clause 8,
Controlling the levitation height of the emboss cell initiates deformation of the emboss cell when the integral value exceeds a predetermined first criterion in the intensity of pressure at a plurality of locations over time. delete As a control method carried out by the processor of the bedsore-resistant mattress,
Including controlling the levitation height of one or more emboss cells based on the user's body pressure distribution detected by the pressure sensor layer,
The pressure sensor layer detects the intensity of pressure applied at specific positions including a first position and a second position adjacent to each other,
Controlling the levitation height of the emboss cell,
In the intensity of pressure at a certain location over time during a predetermined time interval,
A method comprising controlling the difference between the integral value at the first position and the integral value at the second position to be within a 10% range. As a control method carried out by the processor of an anti-bedsore mattress,
Including controlling the levitation height of one or more emboss cells based on the user's body pressure distribution detected by the pressure sensor layer,
The pressure sensor layer detects the intensity of pressure applied at specific positions including a first position and a second position adjacent to each other,
Controlling the levitation height of the emboss cell,
In the intensity of pressure at a certain location over time during a predetermined time period,
Controlling the integral value at the first position to be within a second standard, but not controlling the second position despite the standard,
When the integrated value at the first position reaches a third standard that is lower than the second standard, the integrated value at the first position is controlled to gradually increase,
When the integral value at the first position reaches a third criterion that is lower than the second criterion, controlling the integral value at the second position to be within the second criterion. According to claim 8, 11 or 12,
In the initial state, an emboss cell has a first floating height,
Controlling the levitation height of the emboss cell includes raising it to a second levitation height higher than the first levitation height, or lowering it to a third levitation height lower than the first levitation height.