KR20170081482A - Chair of sensing pressure - Google Patents
Chair of sensing pressure Download PDFInfo
- Publication number
- KR20170081482A KR20170081482A KR1020160000572A KR20160000572A KR20170081482A KR 20170081482 A KR20170081482 A KR 20170081482A KR 1020160000572 A KR1020160000572 A KR 1020160000572A KR 20160000572 A KR20160000572 A KR 20160000572A KR 20170081482 A KR20170081482 A KR 20170081482A
- Authority
- KR
- South Korea
- Prior art keywords
- pressure sensing
- circuit board
- disposed
- seat
- layer
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
- A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
- A61B5/6891—Furniture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
- G01L1/146—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors for measuring force distributions, e.g. using force arrays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Abstract
A pressure sensing chair according to an embodiment of the present invention includes a pressure sensing sensor incorporated in a seat, a signal processing unit connected to the pressure sensing sensor, for processing electric signals generated by the pressure sensing sensor, Wherein the pressure sensing sensor comprises a first electrode layer comprising a first conductive region comprising a conductive fabric, an elastic dielectric layer disposed on the first electrode layer, and a second dielectric layer disposed on the elastic dielectric layer, And a flexible printed circuit board electrically connected to the first and second electrode layers, wherein the flexible printed circuit board is formed on the seating plate And is guided to the outside through the through hole.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure sensing chair, and more particularly, to a pressure sensing chair incorporating a pressure sensing sensor in a seat of a chair.
Recently, the development of electronic technology and information communication technology has been rapidly developing the field of health care. That is, there is a demand for a health management system capable of measuring the body condition of a person using biometric information. In particular, a technique for acquiring biometric information using a chair mainly used in daily life has been developed. For example, techniques have been developed to detect the weight, age, and posture of a seated person by attaching a sensor to the pressure sensor.
However, a common chair for acquiring biometric information requires a plurality of independent sensors for measuring a large area, and a space for connecting modules for driving each sensor is additionally required. Further, since the sensor is not flexible and stretchable, it is difficult to apply it to a chair having a curved surface shape, and there is a problem that a foreign body sensed by the sensor is felt when the user is seated in a chair.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a pressure sensing chair for sensing a pressure and a position according to an applied weight.
A pressure sensing chair according to an embodiment of the present invention includes a pressure sensing sensor incorporated in a seat, a signal processing unit connected to the pressure sensing sensor, for processing electric signals generated by the pressure sensing sensor, Wherein the pressure sensing sensor comprises a first electrode layer comprising a first conductive region comprising a conductive fabric, an elastic dielectric layer disposed on the first electrode layer, and a second dielectric layer disposed on the elastic dielectric layer, And a flexible printed circuit board electrically connected to the first and second electrode layers, wherein the flexible printed circuit board is formed on the seating plate And is guided to the outside through the through hole.
The seat plate may include a first sheet layer and a second sheet layer disposed on the first sheet layer, wherein the pressure sensor may be disposed between the first sheet layer and the second sheet layer.
The through hole is formed from a surface of the first sheet layer facing the pressure sensing sensor to a surface facing downward of the seat, and the flexible circuit board can be led down the seat through the through hole.
The signal processing unit is disposed below the seat and can be connected to the flexible circuit board.
The pressure sensing sensor according to the embodiment of the present invention can precisely detect the pressure according to the applied weight and can accurately detect the pressure distribution. Also, the pressure sensing chair according to the embodiment of the present invention can be large- , A foreign body feeling is not felt to the user. In addition, the pressure sensing chair according to the embodiment of the present invention has a plurality of pressure sensing points and is simple in modularization.
1 shows a pressure sensing chair according to an embodiment of the present invention.
2 is a block diagram of a pressure sensing device incorporated in a pressure sensing chair according to an embodiment of the present invention.
3 is a cross-sectional view of a pressure sensing sensor according to an embodiment of the present invention.
4 is a bottom view of a pressure sensing sensor according to an embodiment of the present invention.
5 is a top view of a pressure sensor according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view taken along the line A-A 'in FIG. 5, and FIG. 7 is a cross-sectional view taken along line B-B' in FIG.
8 to 10 are views for explaining the thickness variation of the elastic dielectric layer in the pressure sensing sensor according to an embodiment of the present invention.
11 is a cross-sectional view of a seat plate incorporating a pressure sensing sensor according to an embodiment of the present invention.
12 is an exploded view of a seat plate incorporating a pressure sensing sensor according to an embodiment of the present invention.
The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.
It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.
The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.
Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.
Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.
FIG. 1 shows a pressure sensing chair according to an embodiment of the present invention, and FIG. 2 is a block diagram of a pressure sensing device incorporated in a pressure sensing chair according to an embodiment of the present invention.
1 and 2, the
The
According to an embodiment of the present invention, the
The
3 is a cross-sectional view of a pressure sensor according to an embodiment of the present invention. FIG. 4 is a bottom view of a pressure sensor according to an embodiment of the present invention. FIG. 6 is a cross-sectional view taken along the line A-A 'of FIG. 5, and FIG. 7 is a cross-sectional view taken along the line B-B' of FIG.
3 to 5, the
The
Here, the conductive fabric is a fabric composed of conductive fibers, and the conductive fibers may be a metal wire or a plain fiber coated with a metal film on the surface. The conductive fibers may be ordinary fibers in which metal particles are dispersed. When the conductive fiber is a metal wire, the diameter of the metal wire may be 10 탆 to 100 탆. If the diameter of the metal wire is less than 10 mu m, the strength of the metal wire may be too weak to process the fabric. If the diameter of the metal wire is more than 100 mu m, the rigidity of the metal wire may be high and the flexibility of the fabric may deteriorate. It can damage the equipment, and the user is likely to feel a sense of heterogeneity. At this time, the metal wire may be Cu, Ni, or a stainless steel alloy. The stainless alloy may be, for example, a martensitic stainless alloy, a ferritic stainless alloy, an austenitic stainless alloy, a two-phase stainless alloy, a precipitation hardening stainless alloy, or the like. When the metal wire is a stainless steel alloy, corrosion resistance of the
When the conductive fiber is a general fiber coated with a metal film on the surface, the metal film can be formed by a method in which the metal particles are coated on the surface of the ordinary fiber by a plating method or a vapor deposition method. At this time, the metal particles may be Cu, Ni, or a stainless alloy, and the thickness of the metal film may be 1 to 50 탆. If the thickness of the metal film is less than 1 탆, the conductivity may be low, which may cause a loss in signal transmission. If the thickness of the metal film exceeds 50 탆, the metal film may be easily separated from the surface of the fiber.
The
When the
The
A plurality of second
The wires 324-11, 324-12, ..., 324-1n, 324-21, 324-22, ..., and 324-1m made of the conductive fabric are electrically connected to the respective second conductive regions 322- 322-1, 322-12, ..., 322-1n, 322-21, 322-22, ..., 322-1m, and connected to the copper wiring inserted in the
The
In a case where the
At this time, as shown in Figs. 6 to 7, each of the second conductive regions 322-11, 322-12, ..., 322-1n, 322-21, 322-22, ..., 322-1m The wires 324-11, 324-12, ..., 324-1n, 324-21, 324-22, ..., and 324-1m drawn out from the first
More specifically, the wirings 324-n drawn out from the respective second conductive regions 322-11, 322-12, ..., 322-1 n, 322-21, 322-22, The distance a between the edges of the first
Here, the wirings 324-11 and 324 (FIG. 32) drawn out from the respective second conductive regions 322-11, 322-12, ..., 322-1n, 322-21, 322-22, -12, ..., 324-1n, 324-21, 324-22, ..., 324-1m may be disposed between the two first
Here, the
Meanwhile, according to the embodiment of the present invention, the two first
At this time, at least three second conductive regions may be disposed on one first conductive region. When at least three second conductive regions are disposed on one first conductive region, at least three pairs of left and right capacitance variation amounts can be obtained, so that the resolution of pressure sensing can be increased.
Hereinafter, when the pressure is applied on one of the second
8 to 10 are views for explaining the thickness variation of the elastic dielectric layer in the pressure sensing sensor according to an embodiment of the present invention.
Referring to Figs. 8 to 10, the x axis and y axis constitute the plane on which the elastic dielectric layer lies, and the d axis represents the direction perpendicular to the elastic dielectric layer, i.e., the direction in which the force is applied.
Figs. 8 to 9 show the thickness distribution of the elastic dielectric layer with reference to the x-axis, and Fig. 10 shows the thickness distribution of the elastic dielectric layer with the grid shape of the x- and y-axes.
When pressure is applied on the second conductive region, the thickness of the elastic dielectric layer can vary as shown in Figures 8-10. That is, assuming that x 1 to x n and y 1 to y n are both located in one second conductive region, the thickness variation of the elastic dielectric layer may vary in one second conductive region. According to an embodiment of the present invention, the amount of capacitance change can be calculated based on the thickness distribution of the elastic dielectric layer disposed between one second conductive region and one corresponding first conductive region. At this time, the thickness distribution of the elastic dielectric layer may include at least one of the thickness distribution in the x-axis direction and the thickness distribution in the y-axis direction.
In this case, the capacitance change between one second conductive region and the corresponding first conductive region can be expressed by the following equation.
Here, C is the amount of capacitance change between one second conductive region and the corresponding first conductive region, C x is a capacitance change amount with respect to the x-axis of one second conductive region and the corresponding first conductive region, and Cy Represents the amount of capacitance change with respect to the y-axis of one second conductive region and the corresponding first conductive region. Here, C x can be expressed by the following equation (2).
Here,? Is a dielectric constant, A is the area where the first conductive region and the second conductive region overlap, and d is the distance between the first conductive region and the second conductive region, that is, the thickness of the elastic dielectric layer. C y can also be expressed in the same manner as in Equation (2).
As described above, according to the embodiment of the present invention, not only the capacitance change amount for one point in the second conduction region but also the total capacitance change amount in the second conduction region can be obtained, the distribution of the capacitance variation amount in the second conduction region . Accordingly, the resolution of the pressure sensor can be increased.
For example, the maximum resolution that can be obtained by a conventional FSR (Force Sensing Resistor) for measuring a capacitance variation with respect to a specific point is 0.075 to 0.5 mm. However, when the capacitance variation is measured according to the embodiment of the present invention, The resolution is about 0.01 mm.
According to one embodiment of the present invention, the
FIG. 11 is a sectional view of a seat plate incorporating a pressure sensing sensor according to an embodiment of the present invention, and FIG. 12 is an exploded view of a seat plate incorporating a pressure sensing sensor according to an embodiment of the present invention.
11 to 12, the
Thus, if the
At this time, the
12, a
Further, the bottom surface of the
Here, the
At this time, the thickness of the
That is, the thickness of the
In addition, the modulus of elasticity of the
11 to 12, the
The
Therefore, even when the user sits and stands up, the connection portion between the
Here, the through
At this time, the
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that
110:
112: first sheet layer
114: second sheet layer
210: Pressure sensor
910: Through hole
Claims (4)
A signal processor connected to the pressure sensor for processing electrical signals generated by the pressure sensor,
A control unit for generating a control signal in accordance with a result processed by the signal processing unit,
Lt; / RTI >
The pressure sensor
A first electrode layer including a first conductive region made of a conductive fabric,
An elastic dielectric layer disposed on the first electrode layer,
A second electrode layer disposed on the elastic dielectric layer, the second electrode layer comprising a second conductive region comprising a conductive fabric, and
A flexible circuit board electrically connected to the first electrode layer and the second electrode layer,
/ RTI >
Wherein the flexible circuit board is guided to the outside through a through hole formed in the seat.
Wherein the seat comprises a first sheet layer and a second sheet layer disposed on the first sheet layer,
Wherein the pressure sensing sensor is disposed between the first sheet layer and the second sheet layer.
Wherein the through hole is formed from a surface of the first sheet layer facing the pressure sensor to a surface facing downward of the seat,
Wherein the flexible circuit board is guided downwardly of the seat through the through hole.
Wherein the signal processing unit is disposed below the seat and is connected to the flexible circuit board.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160000572A KR20170081482A (en) | 2016-01-04 | 2016-01-04 | Chair of sensing pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020160000572A KR20170081482A (en) | 2016-01-04 | 2016-01-04 | Chair of sensing pressure |
Publications (1)
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KR20170081482A true KR20170081482A (en) | 2017-07-12 |
Family
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Family Applications (1)
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KR1020160000572A KR20170081482A (en) | 2016-01-04 | 2016-01-04 | Chair of sensing pressure |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200072671A (en) * | 2018-12-13 | 2020-06-23 | 주식회사 듀오백 | Seat structure for smart chair |
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2016
- 2016-01-04 KR KR1020160000572A patent/KR20170081482A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200072671A (en) * | 2018-12-13 | 2020-06-23 | 주식회사 듀오백 | Seat structure for smart chair |
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