KR101331089B1 - Apparatus for working guidance using human body communication - Google Patents

Abstract

Disclosed is a walking guide apparatus using human body communication that can provide accurate walking guide information and improve usability. The walking guidance apparatus is installed in a cane or the like to obtain a walking guidance information signal and converts the acquired walking guidance information signal into a signal capable of human communication, and then transmits it through a user's body, and the first human body communication means. And a second human body communication means for converting the received signal into a signal recognizable by the user after receiving the signal transmitted through the user's body from the user. Therefore, it is possible to provide walking guidance information having high incompatibility, stability and high accuracy, and improving usability.

Description

Pedestrian guidance device using human body communication {APPARATUS FOR WORKING GUIDANCE USING HUMAN BODY COMMUNICATION}

The present invention relates to a gait guide device for the visually impaired, and more particularly, to a gait guide device using the human body communication that can provide a walking guide to the visually impaired by using the human body communication.

The present invention is derived from a study conducted as part of the IT source technology development project of the Ministry of Knowledge Economy [Task Management Number: 2006-S-072-04, Task name: Human Communication Controller SoC].

In general, visually impaired people recognize their position and danger by detecting a guide block installed in the middle of a sidewalk block to require attention or to guide to a specific location, such as crossings, subway entrances and exits, and stairs when using a walking stick.

As mentioned above, research and development to provide more convenient and safe walking guidance information to the visually impaired by applying IT and communication technology to the cane that the visually impaired carry at all times is possible. This is going on.

An example of applying IT and communication technology is to install an integrated circuit having a communication function on a walking stick so that the visually impaired can walk safely, receive and process information provided from communication systems installed on the road, Apparatuses and methods for providing walking guidance information through voice have been proposed.

For example, a communication system installed at a specific place of a road or structure may provide road status information such as road position or terrain change, obstacles, construction, temperature, humidity, pollution state, and congestion degree to an intelligent transfer system (ITS). The research results of the pedestrian guidance information providing technology based on this are being published in the transportation communication environment.

An example of using an intelligent transportation system for a cane for the visually impaired is an apparatus and method for receiving walking guidance information by applying an RFID, GPS, infrared light, or visible light communication method to the cane, and providing the received walking guidance information to the blind. There is.

Among the aforementioned methods, the visible light communication method is currently being negotiated by the International Standardization Group (IEEE 802.15.7). Visible light communication method can acquire various road information without major change of base traffic light and lighting facility, and can establish optimal communication environment that can notify user's danger situation in real time when two-way communication is realized. There is an advantage. For example, in the case of using the visible light communication method, a variety of road information including location information in the road and indoors and outdoors is different from the GPS method only by replacing a traffic light or a light source of a lighting facility with a light emitting diode (LED) element for visible light communication. Can be easily obtained.

On the other hand, the cane for the visually impaired with the conventional communication function as described above is a method of providing the acquired walking guidance information to the user, using a method of providing walking guidance information through the earphone connected to the cane, or A method of providing walking guidance information using a Bluetooth communication method is used.

When providing the road information to the visually impaired by using earphones, it is necessary to pay close attention to the visually impaired because disconnection of the earphone cable connected to the cane, poor contact between the cane and the earphone cable, or entanglement or jamming of the earphone cable may occur. This has the disadvantage of causing psychological anxiety during use.

In addition, when providing walking guidance information acquired using Bluetooth, since a voice signal is transmitted by adding a Bluetooth function to a communication device built in the cane, interference may occur according to a walking environment of a visually impaired person. There is a drawback that you may not be able to hear important road information, which may expose you to serious safety risks.

SUMMARY OF THE INVENTION An object of the present invention is to provide a walking guide apparatus using human body communication that can accurately provide walking guide information and improve usability.

In order to achieve the above object of the present invention, a walking guidance apparatus using human body communication according to an aspect of the present invention obtains a walking guidance information signal and converts the obtained walking guidance information signal into a signal capable of human communication. After receiving the signal transmitted through the body of the user from the first human body communication means and the first human body communication means to transmit through the user's body and converts the received signal into a signal that the user can recognize and output.

The first human body communication means includes: a light detector for detecting and converting a visible light data signal into an electrical signal; a first communication unit for modulating an electrical signal provided from the light detector and providing a modulated signal; and providing the modulated signal from the first communication unit. And a first electrode configured to receive the provided modulation signal to the user's body.

The first communication unit receives a first receiving module that demodulates an electrical signal provided from the photodetector and an electrical signal demodulated from the first receiving module, and transmits the received demodulated electrical signal through the user's body. And a first transmission module for modulating with.

The first transmission module may perform binary phase shift keying (BPSK) modulation.

The first human body communication means may include a first control unit for performing user authentication using predetermined authentication information when the first human body communication means contacts the body of the user, and user authentication information for authenticating the user. The storage unit may further include a storage unit.

The second human body communication means may be configured to provide a demodulated signal by demodulating a second electrode that contacts the body of the user and receives a signal transmitted from the first communication means, and a signal received through the second electrode. 2 may include a communication unit and a voice processing unit for processing the demodulated signal and outputting a voice signal.

The voice processor may generate and output a voice signal corresponding to the signal transmitted from the first human body communication means.

The voice processor may include a database in which a voice to be output corresponding to the provided signal is stored.

The voice processor may further include a digital signal processing module configured to convert the provided voice data into a voice signal and output the voice signal when the provided signal is voice data.

The voice processor may provide the provided signal as a voice to a user using human body acoustic communication.

The first human body communication means detects at least one signal of an RFID signal, an infrared signal, and a GPS signal to obtain the walking guidance information signal, and converts the obtained walking guidance information signal into a human body communication signal and then the user. Can be transmitted through the body.

In addition, the walking guide apparatus using the human body communication according to another aspect of the present invention for achieving the object of the present invention, by detecting a visible light signal including the walking guide information and processing the detected visible light signal through the user's body After receiving a signal transmitted through the body of the user from the first human body communication means and the first human body communication means for transmitting and processing the received signal to output a voice signal corresponding to the received signal, from the user The provided audio signal is converted into a visible light signal and output.

The second human body communication means provides a demodulated signal by demodulating a second electrode which contacts the body of the user and receives a signal transmitted from the first communication means, a signal received through the second electrode, A second communication unit for modulating the provided voice data to provide a modulated signal, a voice processing unit for processing the demodulated signal to output a voice signal, converting the voice provided from the user into the voice data, and providing the voice data to the second communication unit And a light emitting unit configured to output a visible light signal corresponding to the modulation signal provided from the second communication unit.

The pedestrian guide device using the human body communication as described above is installed in a cane, a walking aid, or a wheelchair on which a visually impaired person or handicapped person depends, and detects visible light, an infrared ray, an RFID signal, a GPS signal, and processes modulation. A first human body communication device which transmits a signal through the user's body and then attaches to the user's body and processes the signal transmitted through the body from the first human body communication device and outputs a voice that is recognizable by the user. 2 includes a human body communication device.

As described above, the walking guidance apparatus according to the embodiment of the present invention uses high visibility and high efficiency visible light communication, and provides walking guidance information using a human body as a communication channel, so that it has high incompatibility, stable and high accuracy. Provide walking guidance information.

In addition, the first human body communication device is installed on an object that the user always carries when walking, such as a cane, and the second human body communication device is configured to be detachable to the user's body and is used by acquiring walking guidance information through the human body. Convenience can be improved.

1 is a conceptual diagram illustrating an example of use of a walking guide apparatus using human body communication according to an exemplary embodiment of the present invention.
2 is a block diagram illustrating a configuration of a first human body communication device among the walking guidance apparatus using human body communication according to an embodiment of the present invention.
3 is a block diagram illustrating a configuration of a second human body communication device among the walking guidance apparatus using human body communication according to one embodiment of the present invention.
4 is a block diagram illustrating a configuration of a first human body communication device among the walking guidance apparatus using human body communication according to another embodiment of the present invention.
FIG. 5 is a block diagram illustrating a configuration of a second human body communication device among the walking guidance apparatus using human body communication according to another embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

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 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. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. 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 herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination 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 the commonly used dictionaries should be construed as having a meaning consistent with the meaning contained in the context of the related art, and should be construed in an idealized or overly formal sense unless explicitly defined in the present application. It doesn't work.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

Hereinafter, the walking guidance information provided to the user through the walking guidance apparatus in the embodiment of the present invention is walking such as road position, terrain change, obstacle, construction presence, temperature, humidity, pollution state, traffic congestion, signal state information, etc. The concept includes all information that the guide device can obtain from the surrounding environment and provide to the user.

1 is a conceptual diagram illustrating an example of the use of a walking guidance device using human body communication according to an embodiment of the present invention, wherein a human body communication device is installed in a cane and a user's body and walks to a user using a human body as a communication channel. An example of providing guide information is illustrated.

Referring to FIG. 1, a walking guidance apparatus according to an exemplary embodiment of the present invention may include a first human body communication device 100 and a second human body communication device 200, and the first human body communication device 100 may be used. The can be installed on an object that can be in contact with the user's body, such as the cane 10, the second human body communication device 200 may be attached directly to the body 20, such as the user's wrist. The first human body communication device 100 and the second human body communication device 200 transmit and receive walking guide information using human body communication.

Human body communication is a communication technology that transmits and receives data by using the human body as a communication channel, and can be classified into a method of using a change in current flowing through the body and a method of using a change in the surface electric field of the human body. Therefore, unlike telephone or wireless communication, there is an advantage that can reduce the risk of crosstalk and eavesdropping. In the embodiment of the present invention, the first human body communication device 100 and the second human body communication device 200 may use any one of the known human body communication methods for human body communication with each other.

In FIG. 1, the first human body communication device 100 installed in the cane 10 receives, for example, demodulates information transmitted from a traffic light having visible light communication function and demodulates the electrode in contact with the user. The second human body communication device 200 processes the information provided from the first human body communication device 100 by using the user's body and outputs a voice signal to the user through the voice. To be acquired. In this case, when the information transmitted through the human body communication from the first human body communication device 100 is voice data, the second human body communication device 200 demodulates the information and provides the same to the user. In the case of simply a location signal (for example, a GPS signal), a voice signal corresponding to the information may be generated and provided to the user.

In addition, the first human body communication device 100 installed on the cane 10 may receive an RFID reader capable of recognizing an RFID tag installed on a road or a facility, an infrared sensor capable of detecting infrared light, and a GPS signal. It may include a GPS receiving module or a communication module having a visible light communication function.

In addition, in FIG. 1, for example, the first human body communication device 100 is installed in the cane 10 mainly used by the visually impaired, but this is only one example for convenience of description and the first human communication device. The 100 may be installed on various objects that a user may contact, such as a handle of a wheelchair or a handle of a walking aid. In addition, the meaning of the contact includes both contacting the skin directly with the first electrode 140 and contacting with a living glove when using the antenna effect according to the material and size of the electrode.

FIG. 2 is a block diagram illustrating a configuration of a first human body communication device among human walking communication apparatuses using human body communication according to an embodiment of the present invention, wherein the first human body communication apparatus is configured to detect visible light signals to obtain walking guidance information; FIG. The case is illustrated by way of example.

Referring to FIG. 2, the first human body communication device 100 includes a first control unit 110, a storage unit 120, a first communication unit 130, a first electrode 140, and a photodetector 150. .

The first control unit 110 controls and manages operations of all components included in the first human body communication device 100, and manages user recognition and authentication information. For example, the first controller 110 stores the user's authentication information in the storage 120 when the user contacts an object (for example, a wand) in which the first human body communication device 100 is installed. In comparison with the authentication information, the operation of the first human body communication device 100 may be activated. If the two information does not match, the operation of the first human communication device 100 may be deactivated.

The storage unit 120 stores recognition information or authentication information for recognition or authentication of the user under the control of the first controller 110.

The first communication unit 130 may include a first receiving module 131 and a first transmitting module 133, and processes the data signal detected by the photodetector 150 under the control of the first control unit 110. After that, the signal is transmitted to the user's body through the first electrode 140.

In detail, the first receiving module 131 demodulates and transmits the visible light detection signal detected by the photodetector 150 to the first transmitting module 133, and the first transmitting module 133 receives the first receiving module 131. ) Modulates the data signal detected by the control unit by the modulation control signal of the first controller 110 and transmits the modulated signal to the user's body through the first electrode 140. Here, the first transmission module 133 may modulate the received signal by applying various modulation methods commonly used in wireless communication technology, but it is preferable to perform modulation by a modulation method suitable for the human body communication standard. When the signal provided through the detector 150 is a relatively simple data signal such as coordinates or voice information indicating a location, BPSK modulation with high modulation efficiency at low speed may be performed.

The first electrode 140 performs a function of transmitting a signal transmitted from the first communication unit 130 to the body of the user. The first electrode 140 may be installed at a position where the first electrode 140 is electrically connected to the first communication unit 130 and in contact with the user's body. In addition, the first electrode may be manufactured in various materials and shapes corresponding to the shape of the object on which the first human body communication device is installed.

The photodetector 150 may include a photodiode for detecting light having a known technology and converting it into an electrical signal corresponding to the detected light, and an amplifier circuit for amplifying a low voltage level to a predetermined level.

For example, the light detecting unit 150 detects a visible light signal provided from a traffic signal lamp composed of a LED (Light Emitting Diode) element for carrying and transmitting road and traffic information and converts the visible light signal through a photodiode into an electrical signal. The electric signal may be amplified to a preset level and then transferred to the first communication unit 130.

3 is a block diagram illustrating a configuration of a second human body communication device among the walking guidance apparatus using human body communication according to one embodiment of the present invention.

Referring to FIG. 3, the second human body communication device 200 includes a second control unit 210, a second communication unit 220, a second electrode 230, and a voice processing unit 240.

The second control unit 210 controls and manages operations of all components included in the second human body communication device 200.

The second communication unit 220 may include a second receiving module 221 and receives and demodulates a signal transmitted by the first human body communication device through the second electrode 230, and then demodulates the demodulated signal into a voice processing unit ( 240).

The second electrode 230 receives the signal transmitted by the first human body communication device 100 through the body of the user from the body of the contacted user and transmits the signal to the second communication unit 220. To this end, the second electrode 230 is configured to be electrically connected to the second communication unit 220 and to be in contact with the user's body. Here, the meaning of the contact includes both contacting the skin directly with the second electrode 230 and contacting the skin without wearing direct contact with the skin when utilizing the antenna effect according to the material and size of the electrode. .

The voice processor 240 processes a signal provided from the second communication unit 220 and outputs a voice signal that a user can listen to.

In detail, the voice processor 240 may include a database 241 in which a voice to be output corresponding to the location coordinates is stored, and when the location coordinates are provided from the second communication unit 220, the voice corresponding to the received location coordinates. Reads from the database 241 and outputs the location information to the user. For the audio output as described above, the voice processing unit 240 may include an acoustic speaker that is commonly used, or may be configured to provide a voice after amplifying the voice signal to be suitable for the earphone (or headphone) output.

Here, when the second human body communication device 200 is configured to receive location information as voice data from the first human body communication device 100 or another external device, the voice processing unit 240 may include a digital signal processor (DSP). It may be configured to convert the voice data provided from the second communication unit 220 including a processor into a voice signal that can be heard by the user and then output the converted voice signal.

Alternatively, instead of being configured to output a voice signal corresponding to the walking guidance information provided through the speaker or the earphone terminal as described above, the voice processing unit 240 may utilize a method of human acoustic communication currently under development. In the technology of the acoustic communication, it may be configured to include, for example, a high frequency signal generation module, a synthesis module of a voice signal, a band pass filter or an amplification circuit.

4 is a block diagram illustrating a configuration of a first human body communication device among the walking guidance apparatus using human body communication according to another embodiment of the present invention.

Referring to FIG. 4, the first human body communication device 100-1 according to another embodiment of the present invention may include a first control unit 110, a storage unit 120, a first communication unit 130-1, and a first electrode. 140 and the signal detector 150-1.

The first control unit 110 controls and manages operations of all components included in the first human body communication device 100, and manages user recognition and authentication information. For example, when the user touches an object (for example, a wand) in which the first human body communication device 100 is installed, the first controller 110 compares the user authentication information stored in the storage unit 120 to match each other. In this case, the operation of the first human body communication device 100 may be activated, and when the two pieces of information do not coincide with each other, the operation of the first human body communication device 100 may be deactivated.

The storage unit 120 stores recognition information or authentication information for recognition or authentication of the user under the control of the first controller 110.

The first communication unit 130-1 may include a first receiving module 131-1 and a first transmitting module 133-1, and according to the control of the first control unit 110, the signal detector 150-. After processing the signal detected from 1) and transmits the signal to the user's body through the first electrode 140.

In detail, the first receiving module 131-1 demodulates the signal detected by the signal detector 150-1 and transmits the demodulated signal to the first transmitting module 133-1, and the first transmitting module 133-1 The signal transmitted from the first receiving module 131-1 is modulated according to the modulation control signal of the first controller 110, and then the modulated signal is transmitted to the user's body through the first electrode 140. Here, the first transmission module 133-1 may modulate the received signal by applying various modulation methods generally used in wireless communication technology, but performing modulation by a modulation method suitable for the standard of human body communication desirable.

The first electrode 140 performs a function of providing a signal transmitted from the first communication unit 130-1 to the user's body. The first electrode 140 may be installed at a position in which the first electrode 140 is electrically connected to the first communication unit 130-1 and in contact with the user's body. In addition, the first electrode 140 may be manufactured in various materials and shapes suitable for the shape of the object on which the first human body communication device 100-1 is installed.

The signal detector 150-1 may be configured as an RFID reader, a GPS receiving module, or an infrared sensor. For example, when the signal detector 150-1 is configured as an RFID reader, after detecting an RFID signal from an RFID tag installed on a road or a facility while walking, the signal detector 150-1 provides the detected signal to the first receiving module 131-1. .

Alternatively, when the signal detector 150-1 is configured as a GPS receiver module, the received GPS signal is provided to the first receiver module 131-1, and the signal detector 150-1 is configured as an infrared sensor. Provides a signal corresponding to the detected infrared rays to the first receiving module 131-1.

FIG. 5 is a block diagram illustrating a configuration of a second human body communication device among pedestrian guide devices using human body communication according to another embodiment of the present invention, in which two-way visible light communication is supported by a visible light communication rule of an intelligent transportation system (ITS); FIG. A configuration of the second human body communication device 200-1 that can be used in the environment is shown.

Referring to FIG. 5, the second human body communication device 200-1 according to another embodiment of the present invention may include a second control unit 210, a second communication unit 220-1, a second electrode 230, and a voice processing unit. 240-1 and the light emitting unit 250.

The second control unit 210 controls and manages operations of all components included in the second human body communication device 200-1.

The second communication unit 220-1 may include a second receiving module 221-1 and a second transmitting module 223-1, and the second receiving module 221-1 may include the second electrode 230. After receiving and demodulating the signal transmitted by the first human body communication device through the demodulated signal is transmitted to the voice processing unit (240-1). The second transmission module 223-1 modulates the voice data transmitted from the voice processor 240-1 and transmits the modulated voice data to the light emitter 250.

The second electrode 230 receives a signal transmitted by the first human body communication apparatus 100 using the user's body from the body of the contacted user and transmits the signal to the second communication unit 220-1.

The voice processing unit 240-1 may include a database 241 in which a voice to be output corresponding to the location coordinates is stored. When the location coordinates are transmitted from the second communication unit 220-1, the voice processing unit 240-1 may correspond to the provided location coordinates. By reading the voice from the database 241 and outputting the voice, location information can be provided to the user. For the audio output as described above, the voice processing unit 240-1 may include an acoustic speaker that is commonly used, and may be configured to amplify and provide a voice signal suitable for output of an earphone (or a headphone).

In addition, the voice processing unit 240-1 may use a microphone (not shown) to acquire the user's voice when the user wants to transmit the user's voice to a predetermined destination by using emergency two-way visible light communication. May include).

In detail, the voice processing unit 240-1 performs digital signal processing on the voice of the user acquired through the microphone, converts the digital signal into a digital signal, and transmits the digital signal to the second transmission module 223-1.

The light emitting unit 250 may include an LED element and a driving circuit for driving the LED element, and data may be generated through visible light generated by blinking the LED element corresponding to a signal modulated from the second transmission module 223-1. Send it.

For the visible light communication as described above, the light emitting unit 250 is preferably installed at a position where the visible area is always secured when the second human body communication device 200-1 is attached to the user. In addition, when a function of the light emitting unit 250 is added to the first human body communication device 100 according to a user's request for a walking guide device, an output signal of the second transmission module 223-1 for bidirectional human body communication. It may be configured as a device for transmitting through the second electrode (230).

The second human body communication apparatuses 200 and 200-1 according to the embodiments of the present invention illustrated in FIGS. 3 and 5 are other than the first human body communication apparatuses 100 and 100-1 illustrated in FIGS. 2 and 4. When communicating with the human body communication devices of the human body communication, it is possible to execute the function of the master device, to be attached to the wrist in consideration of the user's accessibility and ease of operation, or to minimize the connection line of the earphone It may be manufactured in a form that can be attached to the forearm or the like close to the user's ear, or may be manufactured in the form of a headset.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

Claims (13)

First human body communication means for acquiring a walking guidance information signal and converting the acquired walking guidance information signal into a signal capable of human communication and transmitting the same through a user's body; And
A second human body communication means for converting the received signal into a signal recognizable by the user after receiving the signal transmitted through the body of the user from the first human body communication means, and outputting the signal;
The second human body communication means
A second electrode in contact with the body of the user and receiving a signal transmitted from the first communication means;
A second communication unit configured to demodulate a signal received through the second electrode and provide a demodulated signal; And
And a voice processor configured to process the demodulated signal to generate and output a voice signal corresponding to the signal transmitted from the first human body communication means. The method of claim 1, wherein the first human body communication means
A light detector detecting a visible light data signal and converting the visible light data signal into an electric signal;
A first communication unit which modulates an electric signal provided from the photodetector to provide a modulated signal; And
And a first electrode configured to receive the modulated signal from the first communication unit and to provide the received modulated signal to the body of the user. The method of claim 2, wherein the first communication unit
A first receiving module for demodulating an electrical signal provided from the photodetector; And
A first transmission module configured to receive a demodulated electrical signal from the first receiving module and to modulate the received demodulated electrical signal into a signal that can be transmitted through the user's body; Device. The method of claim 3, wherein the first transmission module
Walking guide device using human body communication, characterized in that for performing BPSK (Binary Phase Shift Keying) modulation. The method of claim 2, wherein the first human body communication means
A first controller configured to perform user authentication using predetermined authentication information when the first human body communication means contacts the body of the user; And
And a storage unit storing user authentication information for performing authentication of the user. delete delete The method of claim 1, wherein the voice processing unit
And a database storing a voice to be output in correspondence with a provided signal. The method of claim 8, wherein the voice processing unit
And a digital signal processing module for converting and outputting the provided voice data into a voice signal when the provided signal is voice data. The method of claim 8, wherein the voice processing unit
Walking guidance apparatus using the human body communication, characterized in that to provide the provided signal to the user by using the human body acoustic communication. The method of claim 1, wherein the first human body communication means
Detecting the at least one signal among an RFID signal, an infrared signal, and a GPS signal to obtain the walking guidance information signal, converting the obtained walking guidance information signal into a human body communication signal, and transmitting the same through a user's body; Walking guidance device using a human body characterized in that. First human body communication means for detecting a visible light signal including walking guidance information, processing the detected visible light signal, and transmitting the detected visible light signal through a user's body; And
After receiving the signal transmitted through the body of the user from the first human body communication means and processing the received signal to output a voice signal corresponding to the received signal, converts the voice signal provided from the user into a visible light signal A second human body communication means for outputting
The second human body communication means
A second electrode in contact with the body of the user and receiving a signal transmitted from the first communication means;
A second communication unit for demodulating the signal received through the second electrode to provide a demodulated signal, and modulating the provided voice data to provide a modulated signal;
A voice processor configured to process the demodulated signal to generate and output a voice signal corresponding to the signal transmitted from the first human body communication means, convert the voice provided from the user into the voice data, and provide the voice data to the second communication unit; And
And a light emitting unit configured to output a visible light signal corresponding to the modulated signal provided from the second communication unit. delete

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