WO2018101513A1 - Système de chronomètre intelligent utilisant une communication par ondes sonores - Google Patents

Système de chronomètre intelligent utilisant une communication par ondes sonores Download PDF

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Publication number
WO2018101513A1
WO2018101513A1 PCT/KR2016/014015 KR2016014015W WO2018101513A1 WO 2018101513 A1 WO2018101513 A1 WO 2018101513A1 KR 2016014015 W KR2016014015 W KR 2016014015W WO 2018101513 A1 WO2018101513 A1 WO 2018101513A1
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WO
WIPO (PCT)
Prior art keywords
information
frequency information
sound wave
frequency
smart
Prior art date
Application number
PCT/KR2016/014015
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English (en)
Korean (ko)
Inventor
장지수
Original Assignee
나노소프트(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to PCT/KR2016/014015 priority Critical patent/WO2018101513A1/fr
Publication of WO2018101513A1 publication Critical patent/WO2018101513A1/fr

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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/14—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps characterised by the way of fastening to a wrist-watch or the like
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F10/00—Apparatus for measuring unknown time intervals by electric means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons

Definitions

  • the present invention relates to a smart stopwatch system capable of transmitting and receiving information through sound waves, and more particularly, to generate frequency information of data including exercise information or body information, and immediately after the set notification timer ends, the generated frequency information.
  • the present invention relates to a smart stopwatch system for outputting sound waves or outputting measured body information as sound waves.
  • the Internet of Things which is connected to the Internet not only for users but also for objects, is attracting attention.
  • the Internet of Things refers to a technology that attaches sensors to things and exchanges data in the Internet environment in real time.
  • IoT Internet of Things
  • digital convergence is rapidly progressing in information and communication technologies and industries, including media, devices and services.
  • the Internet of Things is always carried by people and is mainly used through smartphones that can communicate with external devices. Recently, a technique for measuring a user's exercise amount and physical information in real time through a smart watch, etc. has attracted attention.
  • Korean Patent No. 10-1395614 (hereinafter referred to as “priority document”) includes a smart watch that can be attached to or detached from a user's wrist, and the photographing is automatically performed according to the pulse rate measured by a pulse measuring sensor provided in the smart watch.
  • the present invention relates to a pulse rate measurement and automatic photographing transmission device using a smart watch that can automatically cope with an emergency situation of a user by automatically transmitting a photographed image to a designated number along with user location information.
  • Prior art documents use a mobile communication network, and there is a problem in that a cost associated with using a mobile communication network is added.
  • a cost associated with using a mobile communication network is added.
  • a short-range communication network such as wi-fi, Bluetooth, Zigbee, RF communication, as well as mobile communication network
  • the unit cost increases according to the communication module, there is a burden for power consumption.
  • the present invention generates frequency information of the data including the exercise information to solve the above problems, and outputs sound wave information corresponding to the generated frequency information to the outside when the notification timer is terminated according to the end of the exercise time have.
  • the present invention is provided with a drilling hole in the button portion for inputting data, and the sound wave output from the sound wave output unit is passed through the drilling hole is output to the front of the smart stopwatch.
  • Another object of the present invention is to provide a smart stopwatch system in which a snap band rolled up in a specific direction by a predetermined external shock is mounted at one end of the smart stopwatch.
  • the smart stopwatch system using sound wave communication includes an input unit to which input data including at least one of at least one exercise information and a start and end of exercise is input, and input data recognition for recognizing specific information corresponding to the input data.
  • the specific information includes the end time information of the exercise, a timer unit for operating and displaying the notification timer corresponding to the end time information, frequency information generation unit for generating specific frequency information corresponding to the recognized specific information
  • a smart stopwatch including a sound wave output unit for outputting a sound wave signal including the specific frequency information to the outside immediately after the notification timer ends, and a sound wave receiver for receiving a sound wave signal output from the smart stop watch, and the received sound wave.
  • a frequency recognition unit for recognizing specific frequency information corresponding to the signal; It includes a terminal including a data identification unit for identifying the specific information corresponding to the specific frequency information.
  • the input unit includes at least one button unit operated by an external push or contact and a data generation unit for generating the input data according to the push or contact input to the at least one button unit, the button unit At least one drilling hole is provided in the sound wave signal output by the sound wave output unit is characterized in that it is output through the drilling hole.
  • the frequency generating unit includes: exercise frequency information meaning valid exercise information, valid data frequency information, checksum frequency information for verifying the valid data, separator frequency information for distinguishing the valid data information and the checksum information, Each frequency information corresponding to the valid data classification frequency information for distinguishing the same valid data information adjacent to each other is identified by matching with the transmission database.
  • the sound wave output unit simultaneously outputs the movement frequency information, the effective data frequency information, the checksum frequency information, the separator frequency information, the effective data classification frequency information generated by the frequency generator or the respective frequencies in a predetermined order. Output information sequentially.
  • the smart stopwatch system using sound wave communication may be mounted on one end of the smart stopwatch, and further includes a snap band dried in a specific direction by a predetermined external shock.
  • the smart stopwatch according to the present invention further includes a body information measuring unit capable of measuring body information contacted through at least one electrode plate, wherein the frequency information generating unit is configured to measure body frequency information corresponding to the measured body information.
  • the generated body frequency information is characterized in that the sound wave output to the outside through the sound wave output unit.
  • the present invention generates frequency information of the data including the exercise information, and when the notification timer is terminated by the end of the exercise time by outputting the sound wave information corresponding to the generated frequency information to the outside, the user acoustically terminates the alarm timer At the same time, the information can be transmitted to the terminal.
  • the present invention is provided with a drilling hole in the button portion for inputting data, and the sound wave output from the sound wave output unit passes through the drilling hole is output to the front of the smart stopwatch, thereby increasing the sound wave reception rate of the terminal have.
  • the present invention provides a smart stopwatch system in which a snap band rolled up in a specific direction by a predetermined external shock is mounted at one end of the smart stopwatch, so that the smart stopwatch can be mounted on a user's wrist or exercise equipment. have.
  • FIG. 1 is a block diagram of a smart stopwatch system using sound waves according to the present invention.
  • FIG. 2 is a diagram for describing specific frequency information generated by the frequency information generator according to the present invention.
  • FIG 3 is a plan view and a cross-sectional view of the smart stopwatch according to the present invention.
  • FIG. 4 is a plan view and a cross-sectional view of a smart stopwatch equipped with a snap band according to the present invention.
  • FIG. 5 is a view for explaining a mounting method of the smart stopwatch using a snap band according to the present invention.
  • Figure 6 is an embodiment of a smart stopwatch mounted on the hula hoop according to the present invention.
  • Figure 7 is another embodiment of a smart stopwatch mounted on the hula hoop according to the present invention.
  • the smart stopwatch system using sound wave communication may include a smart stopwatch 100 and a terminal 200.
  • the smart stopwatch 100 includes an input unit 110, an input data recognition unit 120, a timer unit 130, a frequency information generation unit 140, a sound wave output unit 150, and a body information measurement unit ( 160, the transmission database 180.
  • the input unit 110 is a device to which input data including at least one of at least one exercise information and a start and end of exercise is input.
  • the exercise information may be exercise information such as yoga, hula hoop, running, and swimming.
  • the input unit 110 may include at least one button unit 111 operated by an external push or contact and a data generation unit 112 generating input data according to the push or contact input to the button unit 111. have.
  • the button unit 111 is provided with an exercise start button and an exercise setting button
  • the exercise when the exercise is set as a hula hoop by the exercise setting button, and the exercise start button is operated by an external push or contact, the data generator 112 generates input data of 'yoga, exercise start'.
  • the input data recognition unit 120 is a device that recognizes specific information corresponding to the input data input to the input unit 110.
  • the input data recognition unit 120 may recognize the input data according to the time and the number of times of push or contact of the button unit 111. For example, if the exercise start button is pressed once, the exercise time is recognized as an increase of 1 minute, and if the exercise start button is continuously pressed, it is recognized as the automatic increase of the exercise time. In addition, when the input setting button and the exercise start button is pressed at the same time, it is recognized as an initialization.
  • input data recognition according to the push or connection of the button 111 is not limited to the above example, it is a function that can be changed or additionally set by the user.
  • the timer unit 130 is a device that operates the notification timer corresponding to the end time information when the end time information of the exercise is included in the specific information. For example, if the exercise end time of 'exercise time 33 minutes' is specified through the exercise setting button provided in the button unit 111, the time information at which the exercise ends through the input data recognition unit 120 is recognized. . Therefore, the timer unit 130 counts the recognized end time of exercise 33 minutes. In addition, the timer unit 130 displays the recognized exercise end time so that the user can check the time.
  • the frequency information generation unit 140 generates specific frequency information corresponding to the recognized specific information.
  • the specific frequency information generated by the frequency information generating unit will be described with reference to FIG. 2.
  • the frequency information generating unit 140 includes exercise frequency information meaning valid exercise information, valid data frequency information, checksum frequency information for verifying valid data, separator frequency information for distinguishing valid data information and checksum information, and the same adjacent to each other.
  • Specific frequency information is generated by combining each frequency information corresponding to the valid data classification frequency information for distinguishing valid data information.
  • D is valid data classification frequency information for distinguishing adjacent valid data information.
  • H, J, K, and L are exercise frequency information corresponding to each exercise.
  • # I is a separator frequency information for distinguishing valid data information and checksum information.
  • B is frequency information indicating the end of input data.
  • Figure 2 is an embodiment when the data 33 minutes yoga exercise is input. Accordingly, exercise frequency information 'H' corresponding to yoga and valid data frequency information '3' and '3' corresponding to 33 are generated. Also, valid data division frequency information '11' for distinguishing adjacent data such as '33' is inserted in the middle of the valid data. Checksum frequency information '1' and '7' are generated to verify valid data. The checksum frequency information is the sum of all valid data. 2, valid data '3' and valid data classification frequency information '11'. Valid data '3' is added to '17' is the checksum frequency information. In addition, a separator frequency information '#' is generated to distinguish valid data information and checksum information. Finally, an end frequency 'B' is generated which means the end of the frequency information.
  • the frequency information generation unit 140 generates frequency information of 'H 3 D 3 # 1 7 B'. Accordingly, if H is set to 10000Hz, 3 to 10300Hz, D to 11000Hz, 1 to 10100HZ, 7 to 10700Hz, # 1 to 12000Hz, and B to 19000Hz, each set frequency information is generated. That is, 10000Hz, 10300Hz, 11000Hz, 10300Hz, 12000Hz, 10100HZ, 10700Hz, 19000Hz are sequentially connected and generated.
  • each frequency information is not limited to the above example, it is a matter that can be arbitrarily set by the user.
  • the sound wave output unit 150 is a device that outputs a sound wave signal including specific frequency information to the outside immediately after the notification timer ends.
  • the alarm timer is designated as '33' minutes
  • sound wave outputs specific frequency information generated by the frequency information generating unit 140 to the outside.
  • the generated frequency as shown in the example of Figure 2 10000Hz, 10300Hz, 11000Hz, 10300Hz, 12000Hz, 10100HZ, 10700Hz, 19000Hz
  • the sound wave output unit 150 is continuously connected to the generated frequency output sound wave for a predetermined time .
  • the preset time is 150ms
  • each frequency is outputted by 150ms.
  • the sound wave output unit 150 outputs one wave of input data to distinguish input data, and then has a silent time of a predetermined time.
  • the sound wave output unit 150 may transmit each generated frequency information at the same time. To this end, it has different frequency domains according to the characteristics of the frequency information.
  • the exercise frequency is specified in the range of 10000 Hz to 11000 Hz
  • the first valid data frequency is set at 1110 Hz to 12000 HZ
  • the second valid data frequency is set at 12100 Hz to 1300 Hz
  • the third valid data frequency is set at 13100 Hz to 1400 Hz.
  • the data classification frequency is designated as an area of 15000 Hz
  • the checksum frequency is 16100 Hz to 17000 Hz
  • the separator frequency is 18000 Hz
  • the end frequency is 19000 Hz.
  • the first valid data frequency refers to the first digit of valid data
  • the second valid data frequency refers to the second digit of valid data
  • the third valid data frequency refers to the third digit of valid data. For example, when the valid data is 35, the first valid data frequency is '3' and the second valid data frequency is '5'.
  • the number of effective data frequencies may be specified by the user, and is not limited to the above example.
  • each frequency domain is partitioned into preset frequency units.
  • the frequency range of 10000Hz to 11000Hz is used. If the preset frequency unit is 100Hz, 11100 is yoga, 11200 is running, 11300 is hulauf, and 11400 has different frequency information according to exercise type. .
  • the first valid data from 11100 Hz to 12000 Hz, 11100 Hz 1, 11200 Hz 2, 11300 Hz 3, 11400 Hz 4, 11500 Hz 5, 11600 Hz 6, 11700 Hz 7, 11800 Hz 8, 11900 Hz 9, 12000 Hz can be set to zero.
  • the second valid data is used from 12100 Hz to 13000 Hz, 12100 Hz 1, 12200 Hz 2, 12300 Hz 3, 12400 Hz 4, 12500 Hz 5, 12600 Hz 6, 12700 Hz 7, 12800 Hz 8, 12900 Hz 9, 13000 Hz may be set to zero.
  • the checksum frequency uses frequencies from 16100 Hz to 17000 Hz, 16100 Hz 1, 16200 Hz 2, 16300 Hz 3, 16400 Hz 4, 16500 Hz 5, 16600 Hz 6, 16700 Hz 7, 16800 Hz 8, 16900 Hz 9, 12000 Hz can be set to zero.
  • the terminal since each frequency uses a different frequency domain, even if the frequency information is output at the same time, the terminal does not have a problem in recognizing data.
  • the frequency information generating unit 140 corresponds to the frequency 11100 Hz corresponding to the yoga, the frequency 11200 Hz corresponding to the first valid data '2', and the second validity.
  • a frequency 12300Hz corresponding to the data '3', a checksum frequency 16500Hz corresponding to the checksum '5', a separator frequency 18000Hz, and an end frequency 19000Hz are generated.
  • the sound wave output unit 150 simultaneously outputs the generated frequencies 11100 Hz, 11200 Hz, 12300 Hz, 16500 Hz, 18000 Hz, and 19000 Hz.
  • frequency information of 11100Hz, 11200Hz, 12300Hz, 16500Hz, 18000Hz, and 19000Hz is simultaneously output as sound waves for 150ms.
  • the body information measuring unit 160 is a device capable of measuring information of a body contacted through at least one electrode plate.
  • the frequency information generation unit 140 generates body frequency information corresponding to the measured body information.
  • the sound wave output unit 150 outputs sound wave generated body frequency information to the outside.
  • the body frequency information generated in the frequency information generation unit 140 is the same as the method for generating the specific frequency information described above.
  • the transmission database 180 includes a transmission frequency table in which frequencies are regularly arranged and a transmission data table in which transmission data arranged so as to correspond to each frequency is regularly arranged.
  • the transmission frequency table motion frequency information, valid data frequency information, checksum frequency information, valid data classification frequency information, separator frequency information, and end frequency frequency values are designated.
  • the transmission data table data corresponding to each frequency information is designated. For example, if the first valid data is set from 11100 Hz to 12000 Hz in the transmission frequency table, 11100 Hz is 1, 11200 Hz is 2, 11300 Hz is 3, 11400 Hz is 4, 11500 Hz is 5, 11600 Hz is 6, 11700 Hz is 7, 11800 Hz is 8, 11900 Hz is 9, 11200 Hz can be mapped to 0 and stored.
  • the terminal 200 includes a sound wave receiver 210, a frequency recognizer 220, a data identifier 230, an exercise amount measurer 240, a notification unit 250, a storage unit 260,
  • the reception database 270 may be included.
  • the sound wave receiver 210 is a device for receiving a sound wave signal output from the smart stopwatch 100.
  • the sound wave receiver 210 is provided as a device capable of receiving voice and sound waves, such as a microphone.
  • the frequency recognition unit 220 recognizes specific frequency information corresponding to the received sound wave signal. For example, when the sound wave signal received by the sound wave receiver 210 is 10000Hz, 10300Hz, 11000Hz, 10300Hz, 12000Hz, 10100HZ, 10700Hz, 19000Hz, the frequency information included in the received sound wave is recognized.
  • the data identification unit 230 identifies specific information corresponding to the recognized specific frequency information. If the frequency information recognized by the frequency recognition unit 220 is 10000Hz, 10300Hz, 11000Hz, 10300Hz, 12000Hz, 10100HZ, 10700Hz, 19000Hz, data corresponding to each frequency information is recognized. To this end, the data identifier 230 may include a database table for data recognition. For example, 10000Hz is 'Yoga', 10300Hz is '3', 11000Hz is 'Identical Data Classification', 12000Hz is 'Delimiter', 10100HZ is '1', 10700Hz, '7', 19000Hz is 'End' If it is stored as, the data identification unit 230 identifies the information 33 minutes yoga.
  • the exercise amount measuring unit 240 is a device measuring an exercise amount corresponding to the identified specific information. For example, when the information identified by the data identification unit 230 is 'yoga 33 minutes', when the yoga is 33 minutes, the amount of exercise such as calories consumed is measured.
  • the storage unit 260 is a device for recording and storing the exercise amount measured by the exercise amount measuring unit 240.
  • the storage unit 260 stores the exercise date, time, type, exercise amount, and the like, and the user can look at the record information stored in the storage unit 260.
  • the reception database 270 includes a reception frequency table in which frequencies are arranged regularly and a reception data table in which reception data arranged to correspond to each frequency is regularly arranged.
  • the reception frequency table is assigned the same value as the transmission frequency table, and the reception data table is assigned the same value as the transmission data table. Accordingly, the frequency recognition unit 220 extracts specific frequency information by matching the received frequency information with the reception frequency table, and the data identification unit 230 maps the extracted specific frequency information with the reception data table to extract specific valid data. do.
  • FIG 3 is a plan view and a cross-sectional view of the smart stopwatch according to the present invention.
  • buttons 3 are an embodiment in which two input units 110 are provided in the smart stopwatch, and the timer unit 130 is positioned between the button units 111 provided to the left and right.
  • the button unit 111 is provided on the input unit 110, and the body information measuring unit 160 surrounds the button unit 111. Therefore, when the user pushes or touches the button 111, the body information of the user may be simultaneously measured.
  • the button portion 111 is provided with a drilling hole 113.
  • a sound wave output unit 150 for outputting sound waves is located at the lower end of the button portion 111. Therefore, when a specific sound wave signal is output by the sound wave output unit 150, the specific sound wave signal is output through the drilling hole 113 provided in the button unit 111.
  • the sound wave recognition rate of the terminal 200 is increased.
  • the smart stopwatch 100 includes a battery 170 for applying power.
  • FIG. 4 is a plan view and a cross-sectional view of a smart stopwatch equipped with a snap band according to the present invention.
  • the snap band 300 is mounted on one end of the smart stopwatch 100.
  • the smart stopwatch 100 is made of a casing capable of mounting the snap band 300.
  • the smart stopwatch 100 may be provided with an insertion hole into which the snap band 300 may be inserted, and a fixing device for fixing the snap band 300 may be provided.
  • the button 111 and the body information measuring unit 160 may be made of a structure that is formed inside the outer surface of the case 114 of the smart stopwatch 100. This may prevent the user from malfunctioning the input unit 110 during exercise.
  • FIG. 5 is a view for explaining the mounting structure of the smart stopwatch using a snap band according to the present invention.
  • the snap band 300 has a characteristic of drying in a specific direction when a predetermined external shock is applied. In this manner, the snap band 300 is rolled up by a predetermined external shock, so that the smart stopwatch 100 can be attached to the user's wrist, the body of the hula hoop, and the like.
  • FIG. 6 is an embodiment of a smart stopwatch mounted on the hula hoop according to the present invention.
  • the snap band 300 mounted on the smart stopwatch 100 wraps the body of the hula hoop 400, so that the smart stopwatch 100 is mounted on the hula hoop 400.
  • FIG. 6 illustrates an embodiment in which the smart stopwatch 100 is mounted on an exercise device through the snap band 300, and the smart stopwatch 100 may be mounted on a user's wrist, a yoga mat, or the like through the snap band 300. .
  • Figure 7 is another embodiment of a smart stopwatch mounted on the hula hoop according to the present invention.
  • the smart stopwatch 100 is a structure in which the smart stopwatch 100 is mounted in a seating hole formed in the inner side of the hula hoop 400.
  • 8 is an embodiment of a smart stopwatch mounted on the yoga mat according to the present invention. 8 is an embodiment for explaining the case where the yoga mat 500 is rolled up and stored. If the yoga mat 500 is not tied up with a string or a rubber band, the loosening occurs. Therefore, by fixing the yoga mat 500 through the snap band 300 is rolled in a specific direction by a predetermined external shock as shown in Figure 8, the smart stopwatch 100 for measuring the exercise and the yoga mat 500 It can be stored at the same time.

Abstract

La présente invention concerne un système de chronomètre intelligent qui permet une génération d'informations de fréquence de données, comprenant des informations d'exercice ou des informations corporelles, et la sortie des informations de fréquence générées sous la forme d'une onde sonore ou des informations corporelles mesurées en tant qu'onde sonore après que la minuterie de notification établie est terminée. La présente invention génère les informations de fréquence de données, comprenant les informations d'exercice, et sort, vers l'extérieur, les informations d'ondes sonores, qui correspondent aux informations de fréquence générées, lorsque la minuterie de notification est terminée en fonction de l'achèvement du temps d'exercice de façon : à permettre à un utilisateur de reconnaître acoustiquement l'achèvement de la minuterie de notification; à activer les informations à transmettre simultanément à un terminal.
PCT/KR2016/014015 2016-12-01 2016-12-01 Système de chronomètre intelligent utilisant une communication par ondes sonores WO2018101513A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/KR2016/014015 WO2018101513A1 (fr) 2016-12-01 2016-12-01 Système de chronomètre intelligent utilisant une communication par ondes sonores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2016/014015 WO2018101513A1 (fr) 2016-12-01 2016-12-01 Système de chronomètre intelligent utilisant une communication par ondes sonores

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WO2018101513A1 true WO2018101513A1 (fr) 2018-06-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007333580A (ja) * 2006-06-15 2007-12-27 Combi Corp 機能タイマー
KR101289027B1 (ko) * 2013-04-02 2013-07-23 나노소프트(주) 무선 음파통신 시스템 및 이를 위한 방법
KR20150126268A (ko) * 2014-05-01 2015-11-11 삼성전자주식회사 웨어러블 디바이스 및 이에 대한 제어 방법
KR20160049332A (ko) * 2014-10-27 2016-05-09 나노소프트(주) 음파 통신을 이용한 정보 송수신 시스템
KR101645175B1 (ko) * 2015-05-26 2016-08-03 나노소프트(주) 음파 통신시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007333580A (ja) * 2006-06-15 2007-12-27 Combi Corp 機能タイマー
KR101289027B1 (ko) * 2013-04-02 2013-07-23 나노소프트(주) 무선 음파통신 시스템 및 이를 위한 방법
KR20150126268A (ko) * 2014-05-01 2015-11-11 삼성전자주식회사 웨어러블 디바이스 및 이에 대한 제어 방법
KR20160049332A (ko) * 2014-10-27 2016-05-09 나노소프트(주) 음파 통신을 이용한 정보 송수신 시스템
KR101645175B1 (ko) * 2015-05-26 2016-08-03 나노소프트(주) 음파 통신시스템

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