KR20150133069A - A communication method for smart phone using ultrasonic signals - Google Patents

Abstract

The present invention relates to a method for near field communications of a smartphone and, more specifically, to a method in which a smartphone communicates with a device connected thereto using an ultrasonic wave. According to this invention, the smartphone transmits a communication signal including the ultrasonic signal and an audible signal via an earphone jack, and the peripheral device communicates by interpreting the ultrasonic signal as ″1″ and the audible signal as ″0″.

Description

TECHNICAL FIELD [0001] The present invention relates to a smartphone communication method using an ultrasound signal,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a local area communication method for a smart phone, and more particularly, to a method for communicating an external device connected to a smart phone using ultrasonic waves.

Methods for wirelessly connecting smart phones and peripherals to communicate via NFC or blue pitch are being developed. These approaches are costly because they require a separate communication chip. Accordingly, there is a continuing need for new ways to enable smart phones to communicate with other smart phones or peripherals.

On the other hand, attempts have been made to communicate using ultrasonic waves.

Korean Patent Laid-Open Publication No. 1998-083776 discloses an ultrasonic multiple communication system in which data between a plurality of electronic control units can be transmitted and received by using ultrasonic waves. The ultrasonic multiple communication system includes a transmitter that modulates input pulse data as a frequency signal of a preset band, converts the modulated signal into an ultrasonic signal and propagates through the propagation medium, and a transmitter A receiver for demodulating only a signal within a predetermined frequency band among the converted frequency signals as pulse data,

And a controller for supplying pulse data for multiplexing to the transmitter and controlling transmission and reception of data by inputting pulse data through the receiver, wherein at least one communication device comprises at least one communication device As an ultrasonic wave.

Since the ultrasonic waves are transmitted through the medium and then demodulated again, these methods cause data loss due to diffraction, reflection, and refraction in the process of passing the ultrasonic waves through the medium. In addition, since ultrasonic waves are transmitted along with disturbance waves during transmission, communication errors occur. Therefore, they are mainly used as communication means in a noiseless water.

Also, a complicated device such as a speaker capable of transmitting an ultrasonic wave and a receiver capable of receiving only a specific band of ultrasonic waves is required in terms of the device.

A problem to be solved by the present invention is to solve problems such as diffraction, reflection, refraction, and disturbance of ultrasonic waves which may occur when communication is performed with a peripheral device of a smartphone using ultrasonic waves.

Another problem to be solved by the present invention is to solve the problem that it is difficult to transmit ultrasound through a speakerphone of a smartphone in a device.

The present invention solves the problem that when a smartphone and a peripheral device communicate with each other through a phone speaker, the phone speaker can not be used during communication.

In order to solve the above problems, a communication method according to the present invention is characterized in that a smart phone transmits a communication signal including an ultrasonic signal and an audible signal through an earphone terminal.

The term " smartphone " is understood to include all mobile devices capable of communicating, including but not limited to mobile phones in the conventional sense. Examples include 3G, 4G smartphones, or smart pads and tablets.

The " earphone terminal " means a terminal for transmitting an audio signal so that the earphone can output sound.

The " audio signal " means an electrical signal that can be converted into sound in an earphone, speaker, or the like.

The " terminal " may be a wired terminal or a wireless terminal. The " wired terminal " may be an " earphone jack " into which a plug of an earphone can be inserted. The " wireless terminal " may be a modem for transmitting an audio signal.

The " ultrasonic signal " means an electrical signal that can be converted into ultrasonic waves. The " ultrasonic " means a sound wave having a frequency of 16 kHz or more.

The " audible signal " means an electrical signal that can be converted into an audible sound wave. The " audible sound wave " means a sound wave having a frequency of less than 16 kHz.

In the present invention, the ultrasonic signal is interpreted as " 1 " in the communication signal, and the audible signal can be interpreted as " 0 " in the communication signal.

In the present invention, the communication signal may be transmitted as a packet including a header area for notifying the start of a signal and a signal area for transmitting contents. The signal region includes a plurality of sub-regions in which a signal of " 0 " or " 1 " is located, and the sub-regions are divided at predetermined intervals.

In the practice of the present invention, the header may be one in which the ultrasound signal lasts for a predetermined time, preferably for a longer time than the one sub-region, more preferably for a time corresponding to one sub-region and one interval have. For example, if the sub-region is 0.02s and one interval is 0.02s, the header may be an ultrasonic signal that lasts 0.04s.

In the present invention, when the length of the packet is long, the size of the information to be stored becomes large and the transmission time becomes long. Therefore, it is preferable that a plurality of subpackets sent to different channels are combined and transmitted as one signal. The subpackets sent through different channels may be combined through the characteristics of the transmission time or the header. Preferably, the subpackets sent at the same time are combined to form a single signal.

In the embodiment of the present invention, when the earphone terminal is a two-channel terminal for realizing stereo sound, the earphone terminal has a first channel for transmitting an audio signal output from the left speaker and a second channel for transmitting an audio signal output from the right speaker. Channel. The first signal may be a combined signal of a first sub-packet transmitted through the first channel and a second sub-packet transmitted simultaneously with the first sub-packet through the second channel.

In another embodiment of the present invention, when the earphone terminal is a 5-channel terminal for implementing surround sound, the first signal is transmitted simultaneously with the first subpacket through the first channel and the first subpacket through the second channel, A third subpacket transmitted simultaneously with the first subpacket via the third channel, a fourth subpacket transmitted simultaneously with the first subpacket through the fourth channel, and a fourth subpacket transmitted concurrently through the fifth channel, And a fifth subpacket transmitted simultaneously with the first subpacket may be combined signals.

In the embodiment of the present invention, the smartphone and the external device may be connected to each other through an earphone jack. The communication signal output from the smartphone is connected to the external device through an earphone plug inserted into the earphone terminal and an extension line extending from the earphone plug. The communication signal transmitted through the extension line is interpreted by the external device.

In another embodiment of the present invention, the smartphone and the counterpart device may be wirelessly connected. The communication signal output from the smartphone is transmitted to the earphone terminal, and the communication signal can be transmitted through the wireless radiator. An amplifier capable of amplifying and transmitting the communication signal may be attached to the earphone terminal.

In the present invention, it is understood that the counterpart device refers to a signal input terminal through which a communication signal transmitted from a smartphone can be received, and all electronic devices capable of interpreting the input signal with an agreed standard. The agreed standard may be a DB whose operation is defined according to a communication signal. In the practice of the present invention, the external device may be a smart phone, and may be an office equipment such as an accessory, a printer, a computer, and a facsimile.

In the present invention, the signal input terminal may be a conventional acoustic signal input terminal, for example, a microphone input terminal.

In the present invention, the external device includes a protocol for analyzing signals output from the smartphone. The protocol includes a method of analyzing an ultrasonic signal and an audible signal, a method of distinguishing a header area and a sub area, and the like. In one implementation, the protocol interprets the ultrasound signal as a " 1 ", interprets the audible signal as a " 0 ", recognizes it as a header region for a predetermined time, And recognizes the time as a signal area. In the signal area, signals of " 0 " or " 1 " are combined to be interpreted as one subpacket.

In the present invention, it is preferable that the signal input terminal has a plurality of input terminals for recognizing a signal composed of a plurality of subpackets transmitted from a plurality of channels. The external device combines subpackets input from a plurality of input terminals at the same time and interprets them as one signal.

In the present invention, when the external device is a smart phone capable of transmitting a signal, they can transmit and receive signals to each other and bidirectional communication is possible.

In the present invention, the external device can separate the ultrasonic signal and the audible signal, and transmit the audible signal to the speaker for reproduction. The speaker may be a speaker attached to the device or an earphone speaker attached to the external device.

In the present invention, the smartphone includes an ultrasonic communication control unit for generating a communication signal to be transmitted to an external device.

The ultrasonic communication control unit may be included in the basic operating system of the smart phone together with other communication programs of the smart phone.

The ultrasonic communication control unit may be installed as a basic app separately from the basic operating system of the smart phone. Preferably, the basic app is installed at the kernel end of the smartphone so that the setting of the smartphone can be changed.

The basic application may include a control screen capable of operating an external device communicating with a smartphone and a DB defining a signal, and may change a control signal generated through a control screen to a communication signal including an ultrasonic signal, .

A communication method of a smartphone using ultrasonic waves has been provided by the present invention. The method according to the present invention can communicate ultrasonic signals without outputting them to a speaker, thereby solving a problem of signal damage and signal crosstalk due to speaker output and medium movement. In addition, when a signal is formed by combining subpackets transmitted through the multiple channels of the earphone terminal as in the present invention, a plurality of pieces of information can be stored while shortening the packet length.

In addition, other audible signals output to the earphone jack can be transmitted and simultaneously communicated.

1 is a diagram showing a method of converting an analog signal into a digital signal in the present invention.
2 is a diagram illustrating signals transmitted through one channel in the present invention.
3 is a diagram illustrating signals transmitted through two channels in the present invention.
4 is a DB that defines the operation of an accessory according to the present invention as a digital signal.
5 is a photograph showing a state in which a smartphone and an accessory are combined according to an embodiment of the present invention.
6 is a block diagram illustrating a state in which a smartphone and an accessory are combined according to an embodiment of the present invention.
7 is a view showing a screen of an app control unit according to the present invention.

Hereinafter, the present invention will be described in detail with reference to examples. The following examples are intended to illustrate but not limit the invention.

The signal output from the earphone terminal in the smartphone is separated into an ultrasonic signal having a frequency of 16 kHz or more and an audible signal having a frequency of less than 16 kHz as shown in Fig. If an ultrasonic signal of 16 kHz or higher is defined as "1" and an audible signal other than ultrasonic waves is defined as "0", the analog audio signal outputted through the earphone terminal is converted into a digital signal.

2, an analog signal output through an earphone terminal is converted into a digital signal, which is converted into a communication signal. The communication signal uses a control signal (Header) indicating the start of a signal, a signal of 1 at a wavelength of 0.04 second and a signal of an ultrasonic signal, an audible signal and an interval signal at 0.02 second intervals thereafter. The interval signal may have no frequency or frequency below 16 kHz.

As shown in FIG. 3, for example, when transmitting a signal of the second power of 2, the control signal of the first 0.04 second + the interval of 0.02 second + the wavelength signal of 0.02 second (or no signal) + the interval of 0.02 second + In this case, if the left and right sound signals are classified, it is possible to send 8 kinds of distinguishable signals to the apparatus by adding 2 kinds of left and right division to 2 of 2 in 0.12 seconds. If this method is continued, the signal of 2 to 6 can be divided into the left and right divisions, and 128 different signals can be transmitted in 0.28 seconds. The length of time of the signal depends on how the protocol is structured and is possible from four possible signals in 0.08 seconds.

A communication protocol in which a sub-unit of 280 ms in which an ultrasonic section of 40 ms, a interval section of 20 ms, and a signal section of 20 ms is repeated six times is transmitted to two channels can be used.

As illustrated in FIG. 4, the ear activation signal is made only as an audible signal after the ultrasonic interval of 40 ms in the first channel and the second channel.

After the 40 ms ultrasonic section, the ear-stop signal is divided into a first channel signal followed by an audible signal of 220 ms and an ultrasonic signal of 20 ms, a second channel signal followed by an audible signal for 240 ms after the ultrasonic signal of 40 ms, . ≪ / RTI >

The eye actuation signal may be defined as the same first channel and second channel signal followed by an audible signal of 120 ms, an ultrasonic signal of 20 ms, and an audible signal again of 100 ms after the 40 ms ultrasonic section. In this way, 128 operations can transmit a signal for 280 ms.

5, the accessory 100, which is an external device of the smartphone, has a character-shaped body and a plug 120 that can be inserted into an earphone terminal of a smartphone protruding from a lower end of the character body, An earphone insertion port is formed on one side of the body. Inside the character body, a controller 140 for operating each part of the character body is built in. The earphone plug 120 uses a conventional four-pole earphone and the earphone plug 120 is inserted into the earphone jack 220 of the smartphone 200 to supply power to the controller 140.

The accessory 100 is a robot-type character-type accessory that can be electrically and mechanically reacted through the control unit 140. For example, the character body's ears can be folded back and forth with both sides folded back and forth, and the eyes are illuminated or turned off by the built-in LED bulb, with the eyelids flickering on both eyes. Inside of the body, a small electromagnet and devices capable of moving an ear or an eye are built in, and a switch for turning on or off the LED bulb is built in.

An earphone jack 220 at the lower end of the accessory 100 is connected to an earphone jack 220 in the smartphone 200. The earphone jack 220 is connected to the earphone jack 220, To be communicable.

As shown in FIG. 6, a basic app 250 is installed at a kernel end of the smart phone 200. The base app 250 includes a database 251 that defines a signal that controls the movement of the accessory 100.

The basic application transmits a control signal sent from the app control unit 253 and the app control unit 253 for sending out a control signal for controlling the accessory 100 to the data base 251 in accordance with the communication including the ultrasonic signal and the audible signal And a modulator 252 for modulating the signal.

The modulated communication signal 252 is transmitted to the accessory 100 through the earphone terminal 220.

The communication signal transmitted to the accessory 100 through the earphone terminal 220 is transmitted to the accessory 100 through a receiving unit 142 and a signal processing unit 143 for processing the received communication signal, An operation part 144 for controlling the operation of the part

And a voice transmitting unit 145 for transmitting a voice signal separated from the communication signal to an earphone connected to the accessory.

In the signal processing unit 143, the signal received by the receiving unit 142 is divided into an ultrasonic signal and an audible signal on the basis of the wavelength, and the ultrasonic signal is digitized as "1" and the audible signal is digitized as "0". If the ultrasonic signal lasts for 40 ms, the remaining 240 ms is regarded as the signal area, and the signal value obtained in the remaining 240 ms is compared with the DB 141 to determine the corresponding operation. The operation is then transmitted to the operation unit 141, .

Further, the signal processing unit 143 separately separates the audible signals of 16 kHz or less from the communication signal and transmits them as separate voice signals.

The basic application 250 is downloaded from the Android or Apple app service and installed in the kernel terminal of the smart phone 200 and controls the motion of the accessory using the phone / text / other notification signal of the smart phone. The movement of each part of the accessory can be controlled through the operation buttons.

7, the application control unit 253 for controlling the operation of the character-type smartphone accessory 100 may include an ear operation control unit 261, an eye operation control unit And an LED operation control unit 264. The telephone reception notification control unit 265, the text reception notification control unit 266, the missed call notification control unit 267, the SNS reception notification control unit 264 268), so that it is possible to define and control the movement of the mechanism according to each controlled state at the lower end.

100: Accessories
200: Smartphone

Claims (5)

In a method for a smartphone and a peripheral device to communicate,
Wherein the smart phone transmits a communication signal including an ultrasonic signal and an audible signal through an earphone terminal. The method according to claim 1,
Wherein the communication signal comprises a header area for informing the start of the signal and a signal area for transmitting the content. 3. The method according to claim 1 or 2,
Wherein the communication signal is divided and transmitted through one of a plurality of channels, and is combined in an external device. The method of claim 3,
Wherein the communication signal is transmitted to an external device through a wired line through two channels of an earphone terminal. 3. The method according to claim 1 or 2, wherein the external device reproduces an audible signal included in the communication signal with a speaker.

Images