KR200483102Y1 - Wrist watch type band for automobile driver - Google Patents

Abstract

The present invention relates to a wrist band for a driver who can prevent a safety accident due to drowsiness and the like by monitoring the living body state in real time during operation of the driver through a sensor module worn on the driver's wrist.
According to the present invention, a wristwatch band for a vehicle driver includes a body portion having a control unit processing unit incorporated therein; A wrist band portion formed in a band shape coupled to the body portion and functioning to wear the body portion on the driver's wrist; A GSR sensor including a first electrode and a second electrode and provided on the body portion; And a raised portion protruding from the center of the bottom surface of the body so as to protrude from the lower surface.
The first electrode and the second electrode are opposed to each other with a gap therebetween and are at least partially exposed on the protruding portion, and the inner edge of the first electrode (hereinafter referred to as " , 'First corner portion') and the inner edge portion of the second electrode (hereinafter, 'second corner portion') have a curved structure.

Description

[0001] WRIST WATCH TYPE BAND FOR AUTOMOBILE DRIVER [0002]

The present invention relates to a wrist band for a driver who can prevent a safety accident due to drowsiness and the like by monitoring the living body state in real time during operation of the driver through a sensor module worn on the driver's wrist.

In general, automobiles contain many basic safety problems, which can include automotive faults such as operator errors and brake failures. In order to minimize the damage caused by predictable safety problems, automobiles are equipped with safety devices such as seat belts and airbags. However, these devices can not fundamentally solve safety problems, and there is a need for a way to prevent operator errors (such as drowsiness) that account for a large portion of car accidents.

Due to this necessity, discussions and developments of a driver condition monitoring apparatus have been under way in recent years, and development has been actively conducted for accurate determination of drowsiness and warning processing. Generally developed driver condition monitoring apparatus monitors only the driver's drowsiness state using a sensor (for example, a camera or the like) inside the vehicle as in Korean Patent No. 100291378 (Prior Patent 1) The way to identify risk factors is common. However, since it is difficult to make a comprehensive judgment on all living body conditions that can cause driver accidents by only monitoring the drowsiness state, it is necessary to monitor the driver condition more precisely and perform warning processing and vehicle control.

As described above, in order to comprehensively judge all the driver-related living body conditions, various information such as the pulse, the body temperature, the tension / relaxation state, and the ambient temperature of the driver must be measured without disturbing the driver. A vehicle handle or the like. However, this method is not preferable because a part of the vehicle must be newly developed or modified. For this reason, it is best to implement a wrist band type device for monitoring the driver status comprehensively.

Korean Patent Publication No. 2008-0013129 (prior patent 2) discloses a wristwatch-type health care band as shown in Fig. However, since the wristwatch-type health care band to which the prior art such as the prior patent 1 is applied uses various circuit elements and the circuit element must be mounted on the wrist band portion region for mounting the wrist band type health care band, the wrist band portion and the body portion are electrically and stably connected Therefore, there is a problem in that a short-circuit failure may occur, the configuration is complicated, and the bulky portion is inconvenient for a user to wear on the wrist and carry.

On the other hand, when GSR sensor is mounted on a wristwatch band to monitor the driver's tension / relaxation state, GSR sensor, in contrast to PPG sensor using optical signal, The detection electrodes of the bar and GSR sensor must be able to maintain contact with the driver's skin, ie the wrist, at all times.

However, if the wristband is worn on the driver's wrist, the wristwatch-type band repeatedly shakes or vibrates due to manipulation of the steering wheel, vehicle vibration, or the like, thereby causing the detection electrode of the GSR sensor to touch the driver's skin A state that can not be performed frequently may occur. In this case, it is impossible to detect the biometric information by the GSR sensor, thereby failing to properly implement the driver condition monitoring function.

On the other hand, a normal GSR sensor is usually used as a method of measuring resistance by flowing a direct current through a finger or palm having a high density of a line due to a linear response caused by a sympathetic nerve, but the GSR sensor is used as a wrist band type The wrist is operated as an object to be measured by the wear position.

However, in the case of the wrist, the density of a line relative to a finger or a palm is relatively low, which makes it difficult to accurately measure the skin electrical conductivity when a direct current is used as in the conventional case.

Previous Patent 1. Korean Patent No. 100291378 (Registered on Mar. 3, 2001) Prior Patent 2. Korean Patent Publication No. 2008-0013129 (Published on February 23, 2008)

The object of the present invention is to provide a wristwatch band for a driver who can observe a variety of biometric information of a driver to prevent safety accidents caused by relaxation and drowsiness.

Another object of the present invention is to provide a wristwatch band for a vehicle operator who can accurately measure the skin electrical conductivity at all times by solving all the problems caused by applying the GSR sensor to a wristwatch type band .

Another object of the present invention is to provide a wristwatch band for a vehicle driver that is small in volume and can be easily carried by anyone, by implementing a structure in which a sensor and a circuit element can be mounted only on a body portion.

According to an aspect of the present invention, there is provided a wristwatch band for a vehicle driver comprising: a body portion having a control unit processing unit; A wrist band portion formed in a band shape coupled to the body portion and functioning to wear the body portion on the driver's wrist; A GSR sensor including a first electrode and a second electrode and provided on the body portion; And a raised portion protruding from the center of the bottom surface of the body so as to protrude from the lower surface.

The first electrode and the second electrode are opposed to each other with a gap therebetween and are at least partially exposed on the protruding portion, and the inner edge of the first electrode (hereinafter referred to as " , 'First corner portion') and the inner edge portion of the second electrode (hereinafter, 'second corner portion') have a curved structure.

In addition, the first electrode and the second electrode may be formed to have the same shape as the center portion (hereinafter referred to as a "first center portion") of the first corner portion and the second corner portion And a center distance (hereinafter referred to as a "second center distance") is formed to have the greatest distance.

The first electrode and the second electrode are arranged such that imaginary lines connecting the first center portion and the second center portion (hereinafter, "virtual line") are parallel to the longitudinal axis of the wrist band portion.

According to the wristwatch band for vehicle driver according to the present invention, it is possible to monitor driver's condition by monitoring and considering not only the driver's drowsy state but also various bio-information collectively, thereby maximizing the prevention of safety accidents.

According to the present invention, it is possible to solve all the problems caused by applying the GSR sensor to a wristwatch-type band, The signal can be measured, and the reliability of the device can be further improved.

According to the wristwatch band for vehicle driver according to the present invention, since the wristwatch is apparently similar to a wristwatch, there is an advantage that a driver who is driving the vehicle can easily wear it.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a view of a conventional wrist watch type health care band.
2 is a circuit block diagram of a wristwatch band for a vehicle operator according to the present invention.
FIG. 3 is a photograph showing a circuit configuration including a main PCB and a sensor PCB constituting the present invention. FIG.
4 is a perspective view of a wristwatch band for a driver according to the present invention;
Fig. 5 is a plan view of Fig. 4; Fig.
Figure 6 is a side view of Figure 4;
Fig. 7 is a rear view of Fig. 4; Fig.
8 is a diagram illustrating another arrangement structure different from the arrangement structure of the first and second electrodes proposed in the present invention;
9 is a view illustrating an arrangement structure of the first and second electrodes and another array structure shown in the present invention;

The terminology used in this specification is used only to describe a specific embodiment and is not intended to limit the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, in the present specification, the term " above or above "means to be located above or below the object portion, and does not necessarily mean that the object is located on the upper side with respect to the gravitational direction. It will also be understood that when a section of an area, plate, or the like is referred to as being "above or above another section ", this applies not only to the case where the other section is " And the like.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

Also, in this specification, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Hereinafter, preferred embodiments, advantages and features of the present invention will be described in detail with reference to the accompanying drawings.

The wristwatch band according to the present invention comprises a body part 300 and a wrist band part 400. The body part 300 includes a plurality of sensor parts, a display part, a communication part, and a control processing part such as an MCU or an ECU The wrist band unit 400 is constructed by using two physically separated printed circuit boards so that all necessary circuit elements are realized compactly and the wrist band unit 400 is not provided with a separate device . Therefore, the wristwatch-type band according to the present invention uses a structure in which all the circuit elements are mounted on the printed circuit board and the circuit element is not mounted on the wrist band portion 400, so that it is easy to provide manufacturing and post-service (AS) And it has the advantage that it can be easily worn without any sense of discomfort because it has the same shape as a wristwatch.

The wrist band 400 may have a shape of a wristband coupled to both sides of the body 300 and an OLED display unit 80 may be installed on the body 300. Specifically, the electrodes 231 and 232 of the GSR sensor 230 may be partially exposed in a gold-plated form while being partially exposed, and may include a photodiode A PPG sensor 210 may be installed.

2 is an overall circuit block diagram of a wristwatch band for a vehicle driver according to the present invention. The wristwatch-type band according to the present invention includes a main printed circuit board (hereinafter, referred to as 'main PCB') 100 and a sensor printed circuit board 200 (hereinafter, referred to as 'sensor PCB'). An OLED display unit 80 is provided on the upper surface of the main PCB 100 and a battery management module 30, a slide switch 20, a 9 axis gyro / acceleration sensor 60, a BLE module 70, 1 temperature sensor 50 and a dome switch 90 are installed. The OLED display unit 80 installed on the upper surface of the main PCB 100 is exposed to the outside of the upper case and the communication antenna pattern 75 is provided on the lower surface of the main PCB 100. The PPG sensor 210, the second temperature sensor 220 and the GSR sensor 230 are installed on the sensor PCB 200 and the PPG sensor 210, the second temperature sensor 220, and the GSR sensor 230, The electrode unit is exposed to the outside of the lower case. The main PCB 100 and the sensor PCB 200 are connected by an FFC 150 (Flexible Flat Cable). The battery 10 and the vibration motor 95 are installed between the main PCB 100 and the sensor PCB 200 through a connection jack. The main PCB 100 further includes a battery charging connector and a debug connector.

The battery management module 30 includes a battery charging section 31 and a DC / DC conversion section 35. The battery charging section 31 controls charging of the battery 10, and the DC / Is a function of converting the output voltage of the battery 10 into a DC voltage suitable for each circuit configuration. The slide switch 20 is a switch for blocking the battery 10 when the wristwatch-type band is not used and preventing the battery 10 from being consumed. The first temperature sensor 50 is a sensor for sensing the ambient temperature, and the 9-axis gyro / acceleration sensor 60 is a gyro and acceleration sensor. The dome switch 90 is a switch that provides an operator interface function and is used to switch the operation of the wristwatch-type band at the driver's option. The BLE module 70 is a Bluetooth low energy module that processes Bluetooth communication. In the present invention, the BLE module 70 is programmed to process the Bluetooth function as well as the control function. Therefore, it is implemented without using a separate CPU. The vibration motor 95 is used to send a warning by providing a relatively strong vibration to the driver.

The PPG sensor 210 is a sensor for sensing a PPG (photo-plethysmography) signal, and is composed of a light emitting diode and a photodiode. PPG is a signal that measures changes in blood volume in blood vessels using light absorption, reflection, and scattering depending on the heartbeat. The PPG signal is analyzed in the field of medical measurement, It is used to measure oxygen saturation.

The second temperature sensor 220 is a sensor for measuring the skin temperature of the driver. The GSR (Galvanic Skin Responses) sensor 230 is a sensor for measuring GSR by measuring the skin conductivity. The Galvanic Skin Responses (GSR) sensor 230 stimulates the sympathetic nervous system when a strong emotion is felt, and a lot of sweat is secreted from the sweat glands. This is a sensor for measuring the phenomenon by attaching an electrode to the driver's hand.

The wristwatch-type band of the present invention can determine the stress, tension, relaxation, and excitement state of the corresponding driver through the GSR signal measured through the GSR sensor 230, that is, skin electrical conductivity information.

The BLE module 70 receives sensor values from the 9 axis gyro / acceleration sensor 60, the first temperature sensor 50, the PPG sensor 210, the second temperature sensor 220 and the GSR sensor 230 Then, when it is determined that the driver is in a drowsy state, a warning is given to the driver through the vibration motor 95. The body temperature of the driver is one of the important determining factors for determining the drowsy state of the BLE module 70, and it is necessary to correct the body temperature of the driver according to the internal temperature of the vehicle. For this correction, the present invention has a first temperature sensor (50) and a second temperature sensor (220), respectively, to measure the ambient temperature and the driver's skin temperature.

3 is a photograph showing a circuit configuration including a main PCB and a sensor PCB constituting the present invention. It can be seen that various circuit elements are attached to the lower surface of the main PCB 100 and that the upper surface of the main PCB 100 and the upper surface of the sensor PCB 200 are connected to each other through the FFC 150 by a connector. The battery 10 and the vibration motor 95 are connected to the main PCB 100 through separate connectors and are interposed between the lower surface of the main PCB 100 and the upper surface of the sensor PCB 200 .

An OLED display unit 80 may be provided on the upper surface of the main PCB 100. The GSR sensor 230, the PPG sensor 210 and the second temperature sensor 220 are disposed on the lower surface of the sensor PCB 200 so as to be exposed to the outer surface of the lower case so as to be in direct contact with the wrist skin of the driver.

Meanwhile, although the OLED display unit is used in the present invention, it is needless to say that a similar type of display unit such as an LED or a liquid crystal display unit can be used.

In the case of constructing the driver condition monitoring apparatus, as described above, in the case of the body part 300 on which a plurality of sensors are mounted and the wrist band part 400 for allowing the body part 300 to be worn on the driver's wrist, A sensor-specific design is required.

In contrast to the PPG sensor using an optical signal, the GSR sensor measures skin electrical conductivity by directly contacting the skin, and the detection electrode of the GSR sensor must be able to maintain a constant contact with the driver's skin, i.e., the wrist.

However, if the wristband is worn on the driver's wrist, the wristwatch-type band repeatedly shakes or vibrates due to manipulation of the steering wheel, vehicle vibration, or the like, thereby causing the detection electrode of the GSR sensor to touch the driver's skin A state that can not be performed frequently may occur.

In this case, it is impossible to detect the biometric information by the GSR sensor, so that the driver condition monitoring function can not be implemented properly. Therefore, when the GSR sensor is applied to a wristwatch-type band, it is necessary to be able to detect an accurate bio-signal even in various operating environments. This is because the first and second electrodes 231 and 232 of the GSR sensor are always in contact with the wearer's wrist (Hereinafter referred to as " skin contact holding performance ").

Furthermore, the conventional GSR sensor is generally used to measure resistance by flowing a direct current through a finger or a palm having a high density of a line due to a linear response caused by a sympathetic nerve. However, The band is operated to measure the wrist on the wear position.

However, in the case of a wrist, the density of a line relative to a finger or a palm is relatively low, so that it is difficult to accurately measure the skin electrical conductivity when a direct current is used as in the conventional case.

Ultimately, applying the GSR sensor to a wristwatch band requires a technique that can achieve skin contact maintenance at all times and accurately measure skin electrical conductivity even with the wrist.

The inventors of the present invention have developed the following GSR sensor and body structure to solve the above-mentioned problems. Hereinafter, this will be described in detail.

4 is a perspective view of a wristwatch band for a vehicle driver according to the present invention, Fig. 5 is a plan view of Fig. 4, Fig. 6 is a side view of Fig. 4, and Fig. 7 is a rear view of Fig.

4 to 7, the wristwatch-type band according to the present invention includes a body part 300 and a wrist band part 400 as described above. In particular, the body part 300 has a protrusion 310 formed therein .

The protruding portion 310 is protruded or protruded from a vertical upper portion of a lower surface of the body portion 300. The side surface forms an upward step with respect to a lower surface of the body portion 300, The first electrode 231 and the second electrode 232 of the GSR sensor are disposed on the plane so as to be exposed to the outside.

According to a preferred embodiment, the protuberance 310 is formed at the center of the lower surface of the body 300, and the shape of the protuberance 310 is circular or circular.

The first and second electrodes 231 and 232 are installed on the protruding protrusions 310 protruding from the lower surface of the body 300 and the protrusions 310 are disposed at the center of the lower surface of the body 300 The skin contact area can be concentrated on the ridge 310 when the wristband is worn on the wrist by the driver, and the skin contact maintenance performance of the electrode can be further improved.

However, such a protrusion 310 alone has a limitation in solving the above-mentioned problems. This limitation can be solved by further combining the characteristic design of the GSR sensor with the protrusion 310, and the characteristic design includes the arrangement structure of the electrodes, the arrangement position, the shape, and the electrode distance design.

This will be described in more detail as follows. The GSR sensor is installed such that the first electrode 231 and the second electrode 232 are at least partially exposed on the protrusion 310. The first electrode portion and the second electrode portion, which are exposed on the protrusion portion 310, are arranged to face each other with a gap therebetween.

The first electrode 231 (or the second electrode 232) described in the specification is a portion exposed on the protrusion 310 of the first electrode (or the second electrode) . ≪ / RTI >

The first electrode 231 and the second electrode 232 of the GSR sensor are formed on the inner edge 231a of the first electrode 231 (hereinafter, referred to as a 'first edge' And the inner edge portion 232a of the second electrode 232 (hereinafter referred to as 'second edge portion') are each configured to include a curved structure. The inner corner portion 231a of the first electrode 231 corresponds to the edge portion of the second electrode 232 among the line segments forming the boundary between the upper surface of the first electrode 231 and the upper surface Refers to the area facing. The inner edge 231a of the first electrode 231 and the inner edge 232a of the second electrode 232 are opposed to each other and the outer edge 231b of the first electrode 231 is opposed to the inner edge 231a of the first electrode 231, And the outer edge portion 232b of the second electrode 232 faces the inner edge portion 232a of the second electrode 232. The inner edge portion 232a of the second electrode 232 is opposed to the inner edge portion 231a of the second electrode 232,

The first corner portion 231a (or the second corner portion 232a) may be configured so that one curved line forms the entire first corner portion 231a (or the second corner portion 232a) Or a structure in which a plurality of curved shapes are mixed with each other.

According to a preferred embodiment, the curved structures of the first corner portion 231a and the second corner portion 232a are each configured to include at least one circular arc shape.

More preferably, the curved structure of the first corner portion 231a and the curved structure of the second corner portion 232a have an arc shape of the same curvature having mutually symmetrical structure, And is located in each central region of the first corner portion 231a and the second corner portion 232a.

7, the curved structure of the first corner portion 231a and the curved structure of the second corner portion 232a are each formed in an arcuate shape having mutually symmetrical structure, Both ends of the structure are configured to be connected to another edge portion in the form of a rounded edge.

The outer corner portion 231b of the first electrode 231 and the outer corner portion 232b of the second electrode 232 are each formed in an outwardly convex curved shape so that the protrusions 310 (I.e., the size of the electrode in the longitudinal direction of the wrist band) within the electrodes.

The outer edge 231b of the first electrode 231 and the outer edge 232b of the second electrode 232 are formed in an arc shape and in this case, The arc of the outer corner portion 231b is configured to have a smaller curvature than the arc of the first corner portion 231a and the arc of the outer corner portion 232b of the second electrode 232 is configured to have a curvature smaller than that of the second corner portion 232a, The curvature of the arc of Fig. For the sake of reference, the 'curvature' refers to the degree of curvature of the arc, and the curvature condition is based on the assumption that the top surface of the protrusion 310 has a circular shape.

This is because the outer edge portions 231b and 232b of the first electrode 231 and the second electrode 232 are independent of a distance D1 between the electrodes to be described later so that the outer edge portions 231b and 232b are smooth So as to ensure the maximum area of the electrode.

The GSR sensor is configured to have the following additional features. That is, the first electrode 231 and the second electrode 232 of the GSR sensor are spaced apart from the center portion of the first corner portion 231a among various distances between the first corner portion 231a and the second corner portion 232a (Hereinafter referred to as a "first central portion C1") and a central portion of the second corner portion 232a (hereinafter referred to as a "second central portion C2") have the greatest spacing distance.

7, the inner edge portions 231a and 232b of the first electrode 231 and the second electrode 232 are formed in an arc shape having mutually symmetrical structures, and the first center portion C1 And the second central portion C2 are configured to coincide with the center of the arc. Therefore, the first electrode 231 and the second electrode 232 have the largest distance D1 at the center of the arc, and the distance between the first electrode 231 and the second electrode 232 gradually decreases as the distance from the center increases.

As described above, when the distance between the first electrode 231 and the second electrode 232 is set, the distance D1 between the first central portion C1 and the second central portion C2 is designed to be the largest Is as follows.

As the resistance or impedance of the GSR sensor is large and the range (i.e., the range between the minimum value of the measurement resistance and the maximum value of the measurement resistance) is wide, the sensing performance and accuracy are improved. As a result, it is proportional to the average separation distance between the electrodes.

(Where Z: measurement resistance (impedance), l: average distance between electrodes, a: electrode area,

ρ: skin resistance)

However, the maximum separation distance between the first electrode 231 and the second electrode 232 of the GSR sensor is limited within the range of the protuberance 310 of the body portion 300. In other words, if the spacing distance between the first electrode 231 and the second electrode 232 is designed to be too large, the size of the body 300 may be increased to make it difficult to downsize the product. If the driver wears the body 300 The electrode is frequently detached from the wrist, so that the above-described skin contact holding performance is significantly deteriorated.

Therefore, it is necessary to design an electrode capable of maximizing the average distance between the electrodes within the standard size of the body part 300 and at the same time ensuring excellent skin contact maintenance performance. The two electrodes 232 are arranged on the protruding portion 310 so as to satisfy a specific arrangement to be described later so that the distance D1 between the first central portion C1 and the second central portion C2 is the largest .

The first electrode 231 and the second electrode 232 must be formed to have a size larger than the critical size in order to ensure the skin contact performance of the first electrode 231 and the second electrode 232. In an electrode size satisfying the critical size, When the distance D1 between the corner portions 231a and the center portions C1 and C2 of the inner edge portion 232a of the second electrode 232 is maximized, The distance can be increased as much as possible.

More specifically, the first electrode 231 and the second electrode 232 correspond to a region where one end region of the entire region is in contact with the driver's wrist more than the central region. This is because the wristwatch band of the present invention is worn on the driver's wrist and the driver is always manipulating the handle and the body portion 300 is tilted with respect to the wrist in most cases.

Therefore, when the distance between the first corner portion 231a and the second corner portion 232a is set to be the largest, for example, the distance between one end portion of each of the first corner portion 231a and the second corner portion 232a is maximized, And thus, a state in which the electrode corresponding to the one end of the driver can not touch the driver's skin (i.e., a biometric information detection error) frequently occurs during operation of the steering wheel. On the other hand, when the first electrode 231 and the second electrode 232 are formed so as to have the largest distance D1 between the first central portion C1 and the second central portion C2, It is possible to maximally increase the average separation distance between the electrodes while preventing the error of the detection of the biometric information of the electrodes.

The first electrode 231 and the second electrode 232 of the GSR sensor are configured to have the following features in order to maximize the skin contact holding performance. That is, the first electrode 231 and the second electrode 232 are connected to each other by a phantom line (hereinafter referred to as a virtual line K2) connecting the first central portion C1 and the second central portion C2, Axis length direction K1 of the band portion 400. The longitudinal direction K1 of the band portion 400 is parallel to the longitudinal direction K1.

According to a preferred embodiment, the curved structure of the first corner portion 231a and the curved structure of the second corner portion 232a are arcs of the same curvature having mutually symmetrical structures, and the arc of the first corner portion 231a The center of the circular arc of the second corner portion 232a coincides with the center of the second center C2 and the first electrode 231 and The second electrode 232 is configured such that the imaginary line K2 is arranged to coincide with the longitudinal center axis of the wrist band 400 (K2 in FIG. 7).

When the first electrode 231 and the second electrode 232 are configured to have the above-described arrangement structure, the inventors of the present invention have found that all the electrodes always contact the wrist in consideration of the inclination of the wrist during wrist manipulation, And it is the best structure that can maintain the state.

8, the virtual line K2 may be configured to be orthogonal to the longitudinal axis K1 of the wrist band portion 400, or alternatively, Or the virtual line K2 is inclined at a predetermined gradient? 1 in the longitudinal direction K1 of the wrist band portion 400 as shown in FIG. 9, the following problems may occur.

That is, the wrist is usually formed at an angle of 45 or more with respect to the ground during the driving operation. In this case, the virtual line K2 may be configured to be orthogonal to the longitudinal axis K1 of the wrist band portion 400, If the electrode is designed to be inclined at an angle (for example, 45 degrees), any one of the electrodes may not be able to touch the skin and may float with a gap, and the living body signal (i.e., skin electrical conductivity) can not be measured.

On the other hand, when the electrodes are designed in a parallel arrangement manner, which is an electrode arrangement structure proposed in the present invention, both of the electrodes can always be kept in contact with the wrist even if there is a wrist tilt due to a handle operation.

The GSR sensor according to the present invention is further characterized in that the GSR sensor is configured to detect the skin electrical conductivity by measuring impedance using alternating current, unlike the conventional method of measuring the resistance using direct current. This is because the densities of the wrists are relatively low compared to the fingers or the palms, which makes it difficult to accurately measure the skin electrical conductivity when a direct current is used as in the prior art.

However, when the skin impedance is measured using the alternating current, the frequency of the alternating current must be considered together. That is, in order to accurately measure the skin impedance using the AC power, the frequency should be a frequency at which the cell membrane can be transmitted. Specifically, when the frequency of 5 KHz or more is used, the cell membrane can be permeated.

In view of the foregoing, it is preferable that the GSR sensor use an alternating current having a frequency of 5 Khz to 10 Khz, and it is best to use an alternating current having a frequency of 7 Khz to 8 Khz considering the appropriate amount of variation.

Although the preferred embodiments of the present invention have been illustrated and described using specific terms, such terms are used only for the purpose of clarifying the present invention, and the embodiments of the present invention and the described terminology should be construed to cover the technical scope and scope of the following claims It will be obvious that various changes and modifications can be made without departing from the spirit and scope of the invention. Such modified embodiments should not be individually understood from the spirit and scope of the present invention, but should be within the scope of the present invention.

10: Battery 20: Slide switch
30: battery management module 50: first temperature sensor
60: 9 axis gyro / acceleration sensor 70: BLE module 70,
75: antenna pattern for communication 80: OLED display part
90: Dome switch 95: Vibration motor
100: main printed circuit board 150: FFC (Flexible Flat Cable)
200: sensor printed circuit board 210: PPG sensor
220: second temperature sensor 230: GSR sensor
231: first electrode 231a: first corner portion
232a: second corner portion 232: second electrode
300: body part 310:
400: wrist band C1: first center
C2: second center
D1: a distance between the first central portion and the second central portion

Claims (5)

A body part 300 having a control processing part incorporated therein; A wrist band part 400 configured to be coupled to the body part 300 and functioning to wear the body part 300 on the driver's wrist; A GSR sensor including a first electrode 231 and a second electrode 232 and provided on the body 300; And a protrusion 310 protruding from the center of the lower surface of the body 300 so as to protrude from the lower surface of the body 300,
The first electrode (231) and the second electrode (232)
At least a portion of which is exposed on the ridge portion 310,
An inner corner portion 231a of the first electrode 231 and a second inner electrode portion 232b of the second electrode 232 are exposed from the protrusion 310, ) (Hereinafter referred to as "second corner portions") are each formed in an arc shape,
The center portion of the first corner portion 231a (hereinafter referred to as a "first center portion C1") and the second corner portion 232b of the first corner portion 231a (Hereinafter referred to as " second central portion C2 ") of the first portion 232a is formed to have the greatest spacing distance,
The imaginary line K2 connecting the first central portion C1 and the second central portion C2 is parallel to the longitudinal direction K1 of the wrist band portion 400 And,
The outer corner portion 231b of the first electrode 231 and the outer corner portion 232b of the second electrode 232 are formed in an arc shape,
The circular arc of the first corner portion 231a is configured to have a curvature larger than the circular arc of the outer corner portion 231b of the first electrode 231, Is configured to have a curvature greater than the arc of the outer edge portion (232b) of the electrode (232)
The GSR sensor includes:
Is configured to measure the impedance of the skin in which the first electrode (231) and the second electrode (232) are in contact with each other using alternating current of 5 to 10 Khz frequency.
The method according to claim 1,
The center of an arc of the first corner portion 231a coincides with the first center portion C1 and the center of an arc of the second corner portion 232a coincides with the second center portion C2,
Wherein the first electrode (231) and the second electrode (232) are arranged such that the imaginary line (K2) coincides with the longitudinal axis in the longitudinal direction of the wrist band portion (400) band.
The method according to claim 1,
The apparatus further includes a PPG sensor 210 installed in the body 300, a first temperature sensor 50, a second temperature sensor 220, and a vibration motor 95,
Wherein the first temperature sensor (50) senses an ambient temperature and the second temperature sensor (220) contacts a driver's wrist to sense skin temperature. delete delete

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