KR20190139440A - Werable Biosignal Measuring Apparatus - Google Patents

Abstract

According to an embodiment of the present invention, a wearable biosignal measuring apparatus includes: a biosignal sensor block in contact with the skin of a human body; and a human body wearing part coupled to the biosignal block and bent to form a loop. The biosignal block includes: a housing including a housing space therein and a housing opening formed on one surface thereof, wherein the housing opening is connected to an accommodation space; a slide part inserted into the accommodation space of the housing and moving in the direction of the housing opening with a guide on the inner surface of the housing; a sensor part in contact with the skin and mounted on a sensor guide part; and a pressure buffer part disposed between the slide part and the lower surface of the accommodation space. It is possible to obtain a stable biosignal.

Description

Wearable Biosignal Measuring Apparatus

The present invention relates to a wearable biosignal measuring apparatus, and more particularly, to a wearable biosignal measuring apparatus including a multi-spectral skin photomatrics sensor.

Personal identification technology using biometric information is widely used. In particular, fingerprints, irises, palm veins, and voice recognition technologies are used. However, in the reality that the existing biometric technology is being stealed in various ways, there is a need for another method of biometrics that is impossible to steal.

Korean Patent Nos. 10-1842771 and 10-1757561 propose Multispectral Skin Photomatrics (MSP) devices. A plurality of light emitting elements and a plurality of light receiving elements may be arranged to collect light through a plurality of skin paths, thereby enabling personal identification. This skin optical property device also exhibits different properties depending on the spacing between the skin and the light emitting and receiving elements. Therefore, a stable and reliable structure is required.

One technical problem to be solved by the present invention is to provide a wearable biosignal measuring apparatus that provides a stable adhesion between the skin optical characteristic sensor and the skin, and maintains the adhesion pressure properly, to provide a stable biosignal acquisition .

One technical problem to be solved by the present invention is to provide a wearable biosignal measuring apparatus combining the skin optical characteristic sensor and the ECG sensor.

According to an embodiment of the present invention, a wearable biosignal measuring apparatus includes: a biosignal sensor block in contact with skin of a human body; And a human body wearing part bent to form a loop by coupling to the biosignal block. The bio-signal block may include a housing including an accommodation space therein and a housing opening formed on one surface thereof, the housing opening being connected to the accommodation space; A slide part inserted into the accommodation space of the housing and moving in the direction of the housing opening with a guide on the inner surface of the housing; A sensor unit in contact with the skin and mounted to the sensor guide unit; And a pressure buffer disposed between the slide portion and the lower surface of the accommodation space.

In one embodiment of the present invention, the sensor unit includes a plurality of light receiving elements that are in contact with the skin, mounted on the sensor guide portion, outputs light through a plurality of light emitting elements, and detects an optical signal via the skin. It may be a multi-spectral skin photomatrics (MSP) sensor unit.

In one embodiment of the present invention, the slide portion includes a depression, the skin optical characteristic sensor unit is mounted to the depression protrudes into the housing opening, the slide portion is prevented from being separated by the edge around the housing opening Can be.

In one embodiment of the present invention, the skin optical characteristic sensor unit, a flexible printed circuit board having an arrangement curved surface defined by the azimuth direction and the central axis direction in the cylindrical coordinate system; Light emitting devices arranged in the azimuth direction on the flexible printed circuit board; Light-receiving elements spaced apart from the light-emitting elements in a central axis direction of the flexible printed circuit board and arranged in the azimuth direction; And barrier ribs disposed on the flexible printed circuit board to cover the light emitting device and the light receiving device arranged in a central axis direction and include through holes exposing the light emitting device and the light receiving device, respectively, and extending in the central axis direction. can do.

In one embodiment of the present invention, the lens is inserted into each of the top surface of the through holes of the partition wall; And a transparent waveguide filling each of the through holes.

In one embodiment of the present invention, the pressure buffer may be a spring.

In one embodiment of the present invention, the skin optical characteristic sensor unit is arranged in the direction of the central axis in the curved surface arrangement, the first light emitting device, the first light receiving device, the second light receiving device, the second light emitting device, and It may include a third light receiving element.

In one embodiment of the present invention, the first light emitting device may be an LED device emitting a visible light band, the second light emitting device may be an LED device emitting an infrared band.

In one embodiment of the present invention, the first electrode and the second electrode which is disposed spaced around the opening of the housing in contact with the skin of the human body; And a third electrode disposed on the other surface of the housing. The first to third electrodes may measure an ECG signal.

In one embodiment of the present invention, the control unit disposed inside the housing and controls the light emitting elements of the skin optical characteristic sensor unit; An MSP signal processing unit disposed inside the housing and processing the MSP signal provided by the light receiving elements of the skin optical property sensor unit and providing the MSP signal to the controller; And a transceiver configured to be disposed inside the housing and to transmit the MSP signal to an external device and to receive a control signal from the external device.

According to an embodiment of the present invention, a wearable biosignal measuring apparatus includes: a biosignal sensor block in contact with skin of a human body; And a human body wearing part configured to accommodate the biosignal sensor block and bend to form a loop. The bio-signal block may include: an outer housing including an accommodation space and including an outer opening formed on one surface and inserted into and fixed to the body wearing part; An inner housing inserted into the receiving space of the outer housing and including an inner opening linearly moving in the direction of the outer opening with the inner surface of the receiving space as a guide and aligned with the outer opening; A sensor unit in contact with the skin of the human body and mounted inside the inner housing; And a pressure buffer disposed between the outer housing and the inner housing.

In one embodiment of the present invention, the sensor unit is in contact with the skin of the human body is mounted in the inner housing and outputs light through a plurality of light emitting elements and a plurality of light receiving elements for detecting the optical signal via the human body Skin optical properties may include a (Multispectral Skin Photomatrics; MSP) sensor unit.

In one embodiment of the present invention, the outer housing includes a lower outer housing coupled to each other and an upper outer housing disposed on the lower outer housing, wherein the upper outer housing includes the outer opening and the inner housing. May include a lower inner housing coupled to each other and an upper inner housing disposed on the lower inner housing, and the upper inner housing may include the inner opening.

In one embodiment of the present invention, the skin optical characteristic sensor unit, a flexible printed circuit board having an arrangement curved surface defined by the azimuth direction and the central axis direction in the cylindrical coordinate system; Light emitting devices arranged in an azimuth direction on the flexible printed circuit board; Light-receiving elements arranged at an azimuth and spaced apart from a central axis of the flexible printed circuit board; And partition walls arranged to surround the light emitting elements and the light receiving elements arranged in the central axis direction, and include through holes exposing the light emitting element and the light receiving elements, respectively, and extending in the central axis direction.

In one embodiment of the present invention, the lens is inserted into each of the top surface of the through holes of the partition wall; And a transparent waveguide filling each of the through holes.

In one embodiment of the present invention, the pressure buffer may be a spring.

In one embodiment of the present invention, the skin optical characteristic sensor unit is arranged in the azimuth direction, the first light emitting element, the first light receiving element, the second light receiving element, the second light emitting element, and the third light receiving element It may include.

In one embodiment of the present invention, the first light emitting device may be an LED device emitting a visible light band, the second light emitting device may be an LED device emitting an infrared band.

In one embodiment of the present invention, the first electrode and the second electrode spaced apart from each other around the outer opening of the outer housing is inserted into the outer housing and mounted in contact with the skin of the human body; And a third electrode disposed on the other surface of the outer housing. The body wearing part may further include an opening that exposes the third electrode to the outside, and the first to third electrodes may measure an electrocardiogram signal.

In one embodiment of the present invention, the third electrode may include a plate-shaped electrode body and a plurality of legs extending vertically from the electrode body, the legs may be fixed to the outer housing.

In one embodiment of the present invention, the body wearing portion, the body portion including a display; A first body wearing portion having one end bent to surround the human body with elasticity coupled to one side of the body portion; And a second body wearing portion, one end of which is coupled to the other side of the body portion and the other end of which is fastened to disassemble and couple to the other end of the first body wearing portion and bends to surround the human body. The first body wearing part may include a bent strip-shaped mounting part to which the biosignal sensor block is inserted and fixed.

The biosignal measuring apparatus according to an exemplary embodiment of the present invention may provide stable adhesion between the skin optical characteristic sensor and the skin and maintain the adhesion pressure appropriately, thereby providing stable biosignal acquisition.

1 is a perspective view illustrating an apparatus for measuring wearable biosignal according to an embodiment of the present invention.
2 and 3 are conceptual diagrams showing a close relationship between the wearable biosignal measuring apparatus and the skin according to external force.
4 is a perspective view illustrating a biosignal sensor block of the wearable biosignal measuring apparatus of FIG. 1.
5 and 6 are cross-sectional views taken along the line AA ′ of FIG. 4.
FIG. 7 is a circuit diagram illustrating the wearable biosignal measuring apparatus of FIG. 1.
8 is a perspective view illustrating a wearable biosignal measuring apparatus according to another exemplary embodiment of the present invention.
FIG. 9 is an exploded perspective view illustrating the wearable biosignal measuring apparatus of FIG. 8.
10 and 11 are perspective views illustrating an MSP module of the wearable biosignal measuring apparatus of FIG. 8.
12 and 13 are cross-sectional views taken along line BB ′ of FIG. 11.

Biosignal-based personal authentication technology is a technology that can be embedded in smart watches or bands, the next-generation wearable platform, and is currently in demand. It is a technology that enables personal authentication that is difficult to forgery by simply wearing in various fields requiring certification.

The wearable biosignal measuring apparatus according to an embodiment of the present invention may provide personal authentication based on multiple biosignals (ECG, MSP, etc.).

The MSP sensor changes the structure of the subcutaneous tissue depending on the strength of the pressure in close contact with the skin. Accordingly, the measurement signal characteristic of the MSP sensor has a problem that changes depending on the degree of close contact between the skin and the MSP sensor. Therefore, it is required to maintain a constant pressure between the MSP sensor and the skin within a certain range every time the MSP signal is measured. That is, the pressure change caused by the contact between the human body and the sensor causes the MSP biosignal change. A pressure distribution structure is needed to minimize such MSP biosignal changes.

The wearable biosignal measuring apparatus according to the exemplary embodiment of the present invention may provide a constant contact pressure between the MSP sensor and the skin. Wearing loosely during normal operation, and pressing the outer surface of the housing only when the biosignal measurement is necessary, the pressure buffer, such as a compression spring disposed between the MSP sensor and the housing, the pressure close contact between the skin and the MSP sensor To a certain level. In particular, even if the force exerted on the housing limits the skin contact pressure to within a certain level. The pressure applied to the MSP sensor portion is limited to a certain level by the stopper structure and the pressure buffer portion.

Wearable biosignal measuring apparatus according to an embodiment of the present invention may have a curved surface to follow the original shape of the skin of the MSP sensor unit in order to apply a spatially uniform pressure to the skin. In particular, the MSP sensor module may have a measurement curve bent in a 'C' shape or an 'L' shape in order to measure the biosignal around the radius.

In the wearable biometric authentication device according to an embodiment of the present invention, when a force is applied from the outside of the wearable band to contact the skin of the MSP sensor located on the inside (skin side) of the wearable band, the applied force is excessive. Even if it includes a pressure buffer and a stopper structure to limit the skin pressure to within a certain level.

The wearable biometric authentication device according to an embodiment of the present invention may be worn loosely so that there is no discomfort in normal activities, and only when the bio signal measurement is required, the biosignal measurement may be measured by pressing the outer surface of the housing.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention. Hereinafter, the present invention will be described in more detail with reference to preferred examples. However, these examples are intended to illustrate the present invention in more detail, it will be apparent to those skilled in the art that the present invention is not limited or limited by experimental conditions, material types, and the like. The invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the invention to those skilled in the art. In the drawings, the components are exaggerated for clarity. Portions denoted by like reference numerals denote like elements throughout the specification.

1 is a perspective view illustrating an apparatus for measuring wearable biosignal according to an embodiment of the present invention.

2 and 3 are conceptual diagrams showing a close relationship between the wearable biosignal measuring apparatus and the skin according to external force.

4 is a perspective view illustrating a biosignal sensor block of the wearable biosignal measuring apparatus of FIG. 1.

5 and 6 are cross-sectional views taken along the line AA ′ of FIG. 4.

FIG. 7 is a circuit diagram illustrating the wearable biosignal measuring apparatus of FIG. 1.

1 to 7, the wearable biometric device 100 may include a biosignal sensor block 101 in contact with the skin 10 of a human body; And a human body wearing part 120 that is bent to form a loop by coupling to the biosignal block 101.

The biosignal block 101 includes a housing opening 112 formed therein and having a housing opening 112 formed therein, and the housing opening 112 is connected to the storage space 111. ; A slide part 150 inserted into the accommodation space of the housing 110 and moving in the direction of the housing opening with a guide on the inner surface of the housing 110; A skin optical characteristic diagram including a plurality of light receiving elements contacting the skin, mounted on the slide unit 150, outputting light through a plurality of light emitting elements, and detecting an optical signal via the skin; Multispectral Skin Photomatrics; MSP) sensor unit 130; And a pressure buffer unit 140 disposed between the slide unit 150 and the lower surface of the accommodation space 111.

The human body wearing part 120 may be a band having elasticity or elasticity as a material to be bent. The band may be a plastic or fiber material. When the biosignal sensor block 101 is loosely worn so as not to come into contact with the skin of the wrist, the wearable biosignal measuring apparatus 100 may have a lack of adhesion between the wrist and the skin optical characteristic sensor 130, and thus some channels may The light emitted from the light emitting device may not be transmitted through the skin, but may be directly reflected from the skin surface and transmitted to the light receiving device. On the other hand, when a strong pressure is applied to contact the bio-signal sensor block 101 with the skin of the wrist, the subcutaneous fat layer of the wrist skin may be locally deformed. Accordingly, the bio-signal characteristic of the skin optical characteristic sensor 130 may be modified.

The ECG signal maintains a constant signal quality when the pressure is above a reasonable level. On the other hand, when the pressure is increased, the signal quality of the skin optical characteristic signal is deteriorated due to changes in blood flow and structure of subcutaneous tissue. The skin 10 and the skin optical characteristics are also required to have a uniform adhesion within the appropriate pressure range between the sensor unit 130.

The biosignal sensor block 101 may have a measurement surface 20 to surround the inside of the wrist. The measurement curved surface 20 may be in the form of "C" or "L" to surround the oval or radial according to the circle of the skin. The measurement curved surface 20 may be variously modified according to a measurement position. In order to provide uniform adhesion within the appropriate pressure range between the skin and the skin optical property sensor unit 130, the skin optical property is also provided with a pressure buffer between the sensor unit 130 and the lower surface of the storage space of the housing. 140 is disposed. The edge 114 of one surface on which the housing opening 112 is disposed serves as a stopper with respect to the skin.

When the skin and the edge 114 around the housing opening 112 do not contact, the skin optical property sensor unit 130 may protrude from the housing opening 112. On the other hand, when the skin is in contact with the rim 114 by an external force, the rim 114 presses the skin by an external force. Accordingly, the skin pressed by the rim may protrude toward the skin optical characteristic sensor 130. The skin optical property sensor 130 and the slide 150 are retracted into the housing 110 along the inner surface of the storage space serving as a linear guide. On the other hand, as the skin optical characteristic sensor 130 is retracted into the housing 110, the pressure buffer 140, such as a compression spring may provide a repulsive force. The pressure buffer 140 may provide the skin optical characteristic sensor 130 with the repulsive force reduced than the external force applied to the edge 114 and close the skin optical characteristic sensor 130 to the skin. Can be. Accordingly, regardless of the force pushing the other surface (or the third electrode) of the housing with a finger, the skin optical characteristic is also applied a constant pressure in a predetermined range between the sensor unit 130 and the skin. Accordingly, the skin optical characteristic sensor 130 may acquire a stable biosignal.

The biosignal block 101 may include a housing 110, a slide unit 150, a skin optical characteristic sensor unit 130, and a pressure buffer unit 140. The housing 110 may have a measurement curved surface 20 to be wound around the wrist. The housing 110 may have a plate shape bent along the measurement curved surface 20 with a predetermined thickness and width. The material of the housing may be plastic-based. The housing 110 may include an accommodation space 111 therein and a housing opening 112 formed in the measurement curved surface 111. The housing opening 112 may be connected to the accommodation space 111. The housing opening 112 may have a rectangular shape formed on a curved surface. One surface of the housing in which the housing opening 112 is formed may include an edge 114 and a jaw 113. The edge 114 and the jaw 113 may perform a separation prevention function of the skin optical property sensor 130 and the slide 150. The edge 114 may be a portion in direct contact with the skin of the human body at a strong pressure.

The slide unit 140 may include a recessed portion 153 on the surface facing the housing opening 112 and may be inserted into the storage space 111. The slide unit 140 may have a curved plate shape having a predetermined height and width and a curved surface corresponding to the measuring curved surface 20. The slide unit 140 may be a plastic material. Side surfaces of the slide unit 140 may extend side by side with a tolerance with the inner surface of the storage space (111). Accordingly, the slide unit 140 may perform a linear motion along the inner surface of the storage space 111 to operate as a linear motion guide. The edge of the slide portion 1140 is caught by the jaw 113 around the housing opening 112 to prevent separation. The distance D1 between the bottom surface of the slide unit 150 and the bottom surface of the accommodation space 111 may vary according to pressure.

The skin optical characteristic sensor 130 may contact the skin of the human body through the measurement curved surface 20. The skin optical property sensor 130 may be inserted into the mole 153 of the slide 150. The skin optical property sensor unit 130 includes a flexible printed circuit board 131. The flexible printed circuit board 131 may have an arrangement curved surface defined by an azimuth direction and a central axis direction in a cylindrical coordinate system, and the arrangement curved surface may be bent to correspond to the measurement curved surface 20.

The plurality of light emitting devices 135 and 138 are arranged side by side in the azimuth direction on the flexible printed circuit board 131. A plurality of light receiving elements 136, 137, and 139 are spaced apart from the light emitting elements on the flexible printed circuit board 131 in the central axis direction and arranged in parallel with the light emitting elements in an azimuth direction. The azimuth direction may be an azimuth direction of a cylindrical coordinate system having a curvature in the disposed curved surface, and the central axis direction may be a central axis direction of a cylindrical coordinate system in the arranged curved surface. Each of the partitions 132 may be disposed to surround the light emitting elements and the light receiving elements arranged in the central axis direction and extend in the central axis direction. Each of the barrier ribs 132 may include through holes 132a exposing each of the light emitting elements and the light receiving elements.

The partitions 132 extend in parallel with each other in the central axis direction.

The partitions 132 may be in the form of a strip having a rectangular cross section. The partitions 132 may be rubber or urethane material having elasticity. The partitions 132 may be completely separated from each other or may be distinguished from each other by trenches extending in a central axis direction on an upper surface thereof. Top surfaces of each of the barrier ribs 132 may be connected to each other to substantially coincide with the measurement curved surface 220. The barrier ribs 132 may provide a soft touch to the skin while preventing direct contact between the light emitting devices and the skin. The partitions 132 may be a black material or may be coded with a black material to suppress optical interference of neighboring devices. In addition, when the upper surfaces of the barrier ribs 132 contact the skin, the barrier ribs 132 may be elastically deformed to minimize deformation of the skin. Accordingly, a stable skin optical characteristic signal can be obtained. The through holes 132a of the partition walls may provide a path through which light travels. The cross section of the through hole 132a may be rectangular or circular. The diameter of the through hole 132a may be several hundred micrometers to several millimeters. The height of the through hole 132a may be several hundred micrometers to several millimeters. The barrier rib 132 and the flexible printed circuit board 131 may be coupled by an adhesive. In addition, the flexible printed circuit board 131 may be coupled to the recessed portion of the slide unit by an adhesive.

The lenses 133 may be inserted into and disposed on the upper surfaces of the through holes 132a of the partition wall. The lenses 133 may be hemispherical lenses. The transparent waveguide 134 may fill each of the through holes 132a. The transparent waveguide 134 may support the lens 133 and guide the light traveling therein through total reflection. The lens barrier ribs 132 may be disposed on an upper surface of the transparent waveguide 134. Light emitted from the light emitting element 135 may be transmitted to the lens 133 through the transparent waveguide 134 and focused inside the skin. The light transmitted to the inside of the skin may be focused on the light receiving element 136 through the lens 133 and the transparent waveguide 134 aligned with the light receiving element 136 after traveling through the skin through scattering or reflection. Accordingly, the strength of the measurement signal may increase.

 The light emitting device 135 may be a red (640 nm) or yellow (580 nm) LED emitting light in the visible light band. In addition, the light emitting device 128 may be an LED device that emits near infrared light (850 nm) that emits light in the infrared band. The light receiving elements 136, 137, and 139 collect the light emitted by the light emitting elements via the skin of the human body. The light receiving elements 136, 137, and 139 may be silicon photodiodes.

The skin optical characteristic sensor 130 may include a first light emitting device 135, a first light receiving device 136, a second light receiving device 137, and a second light array device arranged in a direction along a central axis of the arrangement curve. The light emitting device 138 and the third light receiving device 139 may be included. The first light emitting device 135 may be an LED device emitting a visible light band (red or yellow), and the second light emitting device 138 may be an LED device emitting an infrared band (near infrared). The first light emitting element 135, the first light receiving element 136, the second light receiving element 137, the second light emitting element 138, and the third light receiving element 139 are arranged in the central axis direction. Unit channels can be configured. The unit channel may be arranged in a central axis direction extending along the wrist. The unit channel may acquire bio signals for various distances when the distance d between the devices is constant.

The pressure buffer unit 140 may be disposed between the lower surface of the slide unit 150 and the lower surface of the storage space 111. The pressure buffer unit 140 may be mounted on the alignment column 151 protruding from the lower surface of the slide unit 150. The pressure buffer 140 may be a compression spring. The pressure buffer 140 may be provided in plural for a spatially uniform pressure distribution. The pressure buffer 140 may be transformed into a sponge or a balloon to provide a shape restoring force.

The ECG electrodes may include a first electrode 161a, a second electrode 161b, and a third electrode 161c. The electrical signal of the electrocardiogram electrodes is hardly dependent on the pressure between the wrist and the electrocardiogram electrodes, unlike the skin optical characteristic sensor 130. Accordingly, the first electrode 161a and the second electrode 161b may be disposed at an edge of the housing facing the skin inside the wrist. In the ECG signal, a feature parameter obtained by extracting the distance, height, angle, or a combination of waveforms of P, Q, R, S, and T waveforms may operate as a biometric system.

The first electrode 161a and the second electrode 161b may be disposed on the periphery or the edge 114 of the housing opening 112 to contact the skin. The first electrode 161a and the second electrode 161b have a band shape extending in an arc direction from the edge of the housing and may be formed by a metal coating. The third electrode 161c may be disposed on the other surface of the housing. The third electrode may be in the form of a curved disc. The first electrode 161a and the second electrode 161b may contact one wrist of the human body, and the third electrode 161c may contact the finger of the other hand. The first to third electrodes 161a to 161c may measure an ECG signal.

Electrocardiogram signal is obtained by using the third electrode 161c disposed on the other side (or outer side) of the housing and the first electrode 161a and the second electrode 161b disposed on the edge of one side (inner side) of the housing. Measure In addition, the skin optical characteristic signal can be measured at the same time inside the wrist. When the third electrode 161c of the housing is pressed with a finger, the first electrode 161a, the second electrode 161b, and the skin optical property sensor unit 130 disposed in the housing opening are in close contact with the skin. Accordingly, the first to third electrodes 161a to 161c measure an electrocardiogram signal, and the skin optical characteristic sensor 130 may simultaneously measure the skin optical characteristic signal. In this case, the electrocardiogram signal has a constant signal quality if the pressing pressure is above a suitable level. However, the skin optical property signal shows a signal characteristic that is changed due to a change in blood flow, a structure of subcutaneous tissue, etc. as the pressing pressure increases. Therefore, the pressure buffer 140 buffers the pressing pressure to minimize skin deformation to obtain a skin optical characteristic signal. The pressure buffer 140 may simultaneously provide a bio signal measurement with a single operation.

According to a modified embodiment of the present invention, the pressure buffer 140 is most of the adhesion between the sensor and the skin such as PPG (light volume pulse wave), GSR (skin resistance), body resistance (body impedance) affect the measurement accuracy It can be applied to the wearable / patch type biosignal measuring apparatus of the. That is, the multi-spectral skin photomatrics (MSP) sensor unit 130 may be changed into a PPG (optical volume pulse wave), a GSR (skin resistance), and a body impedance sensor.

The MSP signal processor 172 may include a low pass filter that removes noise from the signals provided by the light receiving elements 136, 137, and 139, a non-inverting amplifier that amplifies the signal, and an A / D converter that converts the amplified signal into a digital signal. It may include. The digital MSP signal may be provided to the controller 171.

The controller 171 may control the brightness and timing of the light emitting devices 135 and 138, and transmit the received digital MSP signal to an external device through the transceiver 173. The transceiver 173 may be wired or wireless. The external device may be a signal analysis terminal or a smart phone.

The controller 171 may turn on one light emitting device in the selected unit channel and acquire MSP signals of the light receiving devices in all unit channels. Subsequently, the same operation may be repeated after changing the unit channel. That is, one of LED1a to LED1n is sequentially turned on to measure MSP signals of all light receiving elements PD1a to PD1n, PD2a to PD2n, and PD3a to PD3n under visible light wavelength illumination. Subsequently, one of LED2a to LED2n is sequentially turned on to measure MSP signals of all light receiving elements PD1a to PD1n, PD2a to PD2n, and PD3a to PD3n under IR wavelength illumination.

The ECG signal processor 174 may remove the noise from the signals provided by the first to third electrodes 161a to 161c using a low pass filter, and then amplify the noise through a non-inverting amplifier. The amplified signal may be converted into a digital signal by the A / D converter and then provided to the controller 171. The controller 174 may transmit the digital ECG signal to an external device through the transceiver 173.

The controller 171, the ECG signal processor 174, the MSP signal processor 172, and the transceiver 173 may be accommodated in the housing 110.

8 is a perspective view illustrating a wearable biosignal measuring apparatus according to another exemplary embodiment of the present invention.

FIG. 9 is an exploded perspective view illustrating the wearable biosignal measuring apparatus of FIG. 8.

10 and 11 are perspective views illustrating an MSP module of the wearable biosignal measuring apparatus of FIG. 8.

12 and 13 are cross-sectional views taken along line BB ′ of FIG. 11.

8 to 13, the wearable biosignal measuring apparatus 200 may include a biosignal sensor block 201 in contact with the skin 10 of a human body; And a human body wearing part 260 that accommodates the biological signal sensor block 201 and bends to form a loop. The bio-signal block 201 may include an outer housing 320 and 380 including an accommodation space 321 and an outer opening 381 formed on one surface and inserted into and fixed to the body wearing part 260. An inner opening 371 inserted into the receiving space 321 of the outer housings 320 and 380 and linearly moving in the direction of the outer opening 381 with the inner surface of the receiving space as a guide and aligned with the outer opening 381. Inner housings (340, 370) including; A plurality of light receiving elements 353 contacting the skin 10 of the human body and mounted inside the inner housings 340 and 370, outputting light through a plurality of light emitting elements 352, and detecting an optical signal via the human body. Skin optical characteristic diagram (Multispectral Skin Photomatrics; MSP) sensor unit 350 including; And a pressure buffer 240 disposed between the outer housing and the inner housing.

The body wearing part 260 may be worn on a wrist in the shape of an electronic watch. The body wearing part 260 may include a body part 266 including a display part; A first body wearing portion 262a, one end of which is bent to surround the human body with elasticity coupled to one side of the body portion 266; And a second body wearing portion 262b, one end of which is coupled to the other side of the body portion 266 and the other end of which is fastened to disassemble and couple to the other end of the first body wearing portion 262a and bends to surround the human body. It may include. The first body wearing part 262a may include a bent strip-shaped mounting part 263 into which the biosignal sensor block 201 is inserted and fixed. The body portion 266 may have a disc or a rectangular parallelepiped shape. The first body wearing part 262a may include a passage for wiring for electrical connection with the skin optical characteristic sensor unit 350 and the electronic circuit inside the body part 266. The other end of the first body wearing part 262a and the other end of the second body wearing part 262b may have a fastening structure coupled to each other. The first body wearing part 262a may include an opening 264 for disposing and exposing the third electrode 310 in an outward direction of the wrist in the mounting part 263.

The outer housings 320 and 380 may be bent to surround the radius of the wrist in the form of a band having a predetermined thickness and width to have an “L” shape. The outer housings 320 and 380 may include a lower outer housing 320 coupled to each other and an upper outer housing 380 disposed on the lower outer housing 320. The engagement of the lower outer housing 320 and the upper outer housing 380 may be a snap-fit fastening structure. The upper outer housing 380 may include the outer opening 381. The outer opening 381 may have a curved rectangular shape. The upper surface of the upper outer housing 380 may be bent along the measurement curve 20 of the skin. The measurement curved surface 20 may be a strip of a constant width and bent along the extending direction. The measurement curved surface 20 may be displayed in the direction of the central axis in the width direction and the azimuth direction in the bent extension direction. The central portion of the upper outer housing 380 may include an upper wing protruding in a semicircle shape in both directions in the direction of the central axis. The wing portion may include a semicircular opening 382 therein. The lower outer housing 320 may include a lower wing portion protruding in a semicircle shape at both sides in a central axis direction in the center portion. The first electrode and the second electrode may be inserted into the opening 382 and fixed to the lower wing portion.

The inner housings 340 and 370 may include a lower inner housing 340 coupled to each other and an upper inner housing 370 disposed on the lower inner housing. The upper inner housing 370 may include the inner opening 371. The lower inner housing 340 and the upper inner housing 370 may have a snap-fit fastening structure. The upper inner housing 370 may include a plurality of strips 372 traveling in the central axis direction. The strips 372 may be disposed between the partitions 354 of the skin optical property sensor unit.

The skin optical characteristic sensor unit 350 may include: a flexible printed circuit board 351 having an arrangement curved surface defined by an azimuth direction and a central axis direction in a cylindrical coordinate system; Light emitting devices 352 arranged in the azimuth direction in the flexible printed circuit board 351; Light-receiving elements 353 arranged at an azimuth angle in the flexible printed circuit board and spaced apart in a central axis direction; A through hole 354a disposed to surround the light emitting element 352 and the light receiving elements 353 arranged in the central axis direction and exposing the light emitting element and the light receiving element, respectively, and extend in the central axis direction. The barrier ribs 354 may be formed.

The skin optical characteristic sensor unit 350 may include a first light emitting device LED1, a first light receiving device PD1, a second light receiving device PD2, and a second light emitting device LED2 arranged in the azimuth direction. ), And a third light receiving element PD3. The first light emitting device LED1 may be an LED device emitting a visible light band, and the second light emitting device LED2 may be an LED device emitting an infrared band. The first light receiving element PD1, the second light receiving element PD2, and the third light receiving element PD3 may be photodiodes.

 The lenses 362 may be inserted into and disposed on upper surfaces of the through holes 354a of the partition walls. The transparent waveguide 364 may fill each of the through holes 354a.

 The pressure buffer 240 may be a compression spring. The first protrusion 322 may be disposed on an inner upper surface of the lower outer housing, and the second protrusion 341 may be disposed on an outer lower surface of the lower inner housing. The first protrusion 322 and the second protrusion 341 may be aligned with each other to operate as a sliding guide. The pressure buffer 240 may be disposed to surround the first protrusion 322 or the second protrusion 341 to provide a repulsive force in an aligned state.

The first electrode 330a and the second electrode 330b are spaced apart from each other around the outer openings 381 of the outer housings 320 and 380 to be inserted into and mounted in the outer housings 320 and 380 to contact the skin of the human body. Can be. The third electrode 330c may be disposed on the other surfaces of the outer housings 320 and 380. The body wearing part 260 may include an opening 264 exposing the third electrode 330c to the outside. The first to third electrodes may measure an ECG signal. The third electrode 330c may include a disc-shaped electrode body and a plurality of legs 312 extending vertically from the electrode body. The legs 312 may be fixed to the lower outer housing 320.

While the invention has been shown and described with respect to certain preferred embodiments thereof, the invention is not limited to these embodiments, and has been claimed by those of ordinary skill in the art to which the invention pertains. It includes all the various forms of embodiments that can be implemented without departing from the spirit.

10: skin
100: wearable biometric device
101: biosignal block
110: housing
120: wearing body
130: MSP sensor unit
140: pressure buffer
150: slide section

Claims (21)

A biosignal sensor block in contact with the skin of the human body; And
And a human body wearing part bent to form a loop by coupling to the biosignal block.
The biosignal block is:
A housing including an accommodation space therein and having a housing opening formed on one surface thereof, wherein the housing opening is connected to the accommodation space;
A slide part inserted into the accommodation space of the housing and moving in the direction of the housing opening with a guide on the inner surface of the housing;
A sensor unit in contact with the skin and mounted to the sensor guide unit; And
And a pressure buffer disposed between the slide portion and the lower surface of the storage space. According to claim 1,
The sensor unit includes a plurality of light receiving elements in contact with the skin, mounted on the sensor guide unit, to output light through a plurality of light emitting elements, and to detect an optical signal via the skin (Multispectral Skin Photomatrics) MSP) Wearable bio-signal measuring apparatus, characterized in that the sensor unit. According to claim 1,
The slide unit includes a depression,
The skin optical property sensor unit is mounted to the recess and protrudes into the housing opening,
Wearable bio-signal measuring apparatus, characterized in that the slide unit is prevented from being separated by the edge around the housing opening. The method of claim 2,
The skin optical characteristic sensor unit:
A flexible printed circuit board having an arrangement curved surface defined by an azimuth direction and a central axis direction in a cylindrical coordinate system;
Light emitting devices arranged in the azimuth direction on the flexible printed circuit board;
Light-receiving elements spaced apart from the light-emitting elements in a central axis direction of the flexible printed circuit board and arranged in the azimuth direction; And
Comprising the light emitting device and the light receiving element arranged in the central axis direction on the flexible printed circuit board, including a through hole for exposing the light emitting element and the light receiving element, respectively, and includes a partition extending in the central axis direction Wearable biosignal measuring apparatus, characterized in that. The method of claim 4, wherein
Lenses inserted into and disposed on upper surfaces of the through holes of the partition walls; And
The wearable biometric measuring apparatus of claim 1, further comprising a transparent waveguide filling each of the through holes. According to claim 1,
Wearable biosignal measuring apparatus, characterized in that the pressure buffer is a spring. The method of claim 4, wherein
The skin optical property sensor unit may include a first light emitting device, a first light receiving device, a second light receiving device, a second light emitting device, and a third light receiving device arranged in a direction along a central axis of the arrangement curved surface. Wearable biosignal measuring apparatus. The method of claim 7, wherein
The first light emitting device is an LED device for emitting a visible light band,
The second light emitting device is a wearable biosignal measuring apparatus, characterized in that the LED device for emitting an infrared band. According to claim 1,
First and second electrodes spaced apart around the opening of the housing to contact the skin of the human body; And
Further comprising a third electrode disposed on the other surface of the housing,
The first to third electrodes wearable biosignal measuring apparatus, characterized in that for measuring the electrocardiogram signal. The method of claim 2,
A control unit disposed inside the housing and controlling the light emitting elements of the skin optical property sensor unit;
An MSP signal processing unit disposed inside the housing and processing the MSP signal provided by the light receiving elements of the skin optical property sensor unit and providing the MSP signal to the control unit; And
The wearable biosignal measuring apparatus of claim 1, further comprising a transceiver configured to transmit the MSP signal to an external device and to receive a control signal from the external device. A biosignal sensor block in contact with the skin of the human body; And
And a human body wearing part configured to receive the biosignal sensor block and bend to form a loop.
The biosignal block is:
An outer housing including a storage space and having an outer opening formed on one surface thereof and inserted into and fixed to the body wearing part;
An inner housing inserted into the receiving space of the outer housing and including an inner opening linearly moving in the direction of the outer opening with the inner surface of the receiving space as a guide and aligned with the outer opening;
A sensor unit in contact with the skin of the human body and mounted inside the inner housing; And
And a pressure buffer disposed between the outer housing and the inner housing. The method of claim 11, wherein
The sensor unit includes a plurality of light receiving elements contacting the skin of the human body, mounted inside the inner housing, outputting light through a plurality of light emitting elements, and detecting an optical signal via the human body. Skin Photomatrics (MSP) sensor unit wearable bio-signal measuring apparatus characterized in that the. The method of claim 11, wherein
The outer housing includes a lower outer housing coupled to each other and an upper outer housing disposed on the lower outer housing,
The upper outer housing includes the outer opening,
The inner housing includes a lower inner housing coupled to each other and an upper inner housing disposed on the lower inner housing,
The upper inner housing may include the inner opening. The method of claim 12,
The skin optical characteristic sensor unit:
A flexible printed circuit board having an arrangement curved surface defined by an azimuth direction and a central axis direction in a cylindrical coordinate system;
Light emitting devices arranged in an azimuth direction on the flexible printed circuit board;
Light-receiving elements arranged at an azimuth and spaced apart from a central axis of the flexible printed circuit board; And
The wearable living body includes a partition wall disposed to enclose the light emitting element and the light receiving element arranged in the central axis direction, the through holes exposing the light emitting element and the light receiving element, respectively, and include partition walls extending in the central axis direction. Signal measuring device. The method of claim 13,
Lenses inserted into and disposed on upper surfaces of the through holes of the partition walls; And
The wearable biosignal measuring apparatus of claim 1, further comprising a transparent waveguide filling each of the through holes. The method of claim 11, wherein
Wearable biosignal measuring apparatus, characterized in that the pressure buffer is a spring. The method of claim 12,
The skin optical characteristic sensor part includes a first light emitting device, a first light receiving device, a second light receiving device, a second light emitting device, and a third light receiving device arranged as the light emitting device progresses in the azimuth direction. Signal measuring device. The method of claim 17,
The first light emitting device is an LED device for emitting a visible light band,
The second light emitting device is a wearable biosignal measuring apparatus, characterized in that the LED device for emitting an infrared band. The method of claim 11, wherein
First and second electrodes spaced apart from each other around the outer opening of the outer housing to be inserted into and mounted in the outer housing and in contact with the skin of the human body; And
Further comprising a third electrode disposed on the other surface of the outer housing,
The body wearing part further includes an opening that exposes the third electrode to the outside,
The first to third electrodes wearable biosignal measuring apparatus, characterized in that for measuring the electrocardiogram signal. The method of claim 19,
The third electrode includes a plate-shaped electrode body and a plurality of legs extending vertically from the electrode body,
Wearable biosignal measuring apparatus, characterized in that the legs are fixed to the outer housing. The method of claim 11, wherein
The body wear part:
A body portion including a display portion;
A first body wearing portion having one end bent to surround the human body with elasticity coupled to one side of the body portion; And
One end is coupled to the other side of the body portion and the other end is fastened so as to disassemble and couple to the other end of the first body wearing portion and includes a second body wearing portion bent to surround the human body,
The wearable biosignal measuring apparatus of claim 1, wherein the first body wearer includes a bent strip-shaped mounting part to which the biosignal sensor block is inserted and fixed.

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