FR2199904A5 - - Google Patents

Info

Publication number
FR2199904A5
FR2199904A5 FR7333841A FR7333841A FR2199904A5 FR 2199904 A5 FR2199904 A5 FR 2199904A5 FR 7333841 A FR7333841 A FR 7333841A FR 7333841 A FR7333841 A FR 7333841A FR 2199904 A5 FR2199904 A5 FR 2199904A5
Authority
FR
France
Legal status (The legal status 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 status listed.)
Expired
Application number
FR7333841A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of FR2199904A5 publication Critical patent/FR2199904A5/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing ultrasonic, sonic or infrasonic waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR7333841A 1972-09-20 1973-09-20 Expired FR2199904A5 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47093622A JPS4951801A (fr) 1972-09-20 1972-09-20

Publications (1)

Publication Number Publication Date
FR2199904A5 true FR2199904A5 (fr) 1974-04-12

Family

ID=14087408

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7333841A Expired FR2199904A5 (fr) 1972-09-20 1973-09-20

Country Status (5)

Country Link
US (1) US4045767A (fr)
JP (1) JPS4951801A (fr)
DE (1) DE2347146C3 (fr)
FR (1) FR2199904A5 (fr)
GB (1) GB1447547A (fr)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142177A (en) * 1976-08-12 1979-02-27 Motorola, Inc. Digital tone decoder system
US4390975A (en) * 1978-03-20 1983-06-28 Nl Sperry-Sun, Inc. Data transmission in a drill string
JPS5928869B2 (ja) * 1979-08-24 1984-07-16 日本ビクター株式会社 スペクトル表示装置
US4389644A (en) * 1981-01-21 1983-06-21 Matsushita Electric Works, Ltd. Asynchronous type multichannel signal processing system
JPS56172050U (fr) * 1981-06-10 1981-12-18
US4428073A (en) 1981-11-02 1984-01-24 The United States Of America As Represented By The Secretary Of The Navy Underwater depth telemetry
GB2139788B (en) * 1983-01-10 1986-11-19 Dollman Electronics Limited Underwater communication
JPS60107454A (ja) * 1983-11-15 1985-06-12 財団法人鉄道総合技術研究所 送受信照合式軌道回路を用いた列車位置検知方法
US4660215A (en) * 1983-12-07 1987-04-21 Matsushita Electric Industrial Co., Ltd. Transmitter/receiver system
EP0246460B1 (fr) * 1986-05-05 1991-12-18 Siemens Aktiengesellschaft Procédé pour la mesure des champs alternatifs électriques ou magnétiques et dispositif pour la mise en oeuvre du procédé
NO305219B1 (no) * 1994-03-16 1999-04-19 Aker Eng As FremgangsmÕte og sender/mottaker for overf°ring av signaler via et medium i r°r eller slanger
US20100027379A1 (en) * 2006-10-02 2010-02-04 Gary Saulnier Ultrasonic Through-Wall Communication (UTWC) System
CN102088320B (zh) * 2009-12-03 2013-10-30 建兴电子科技股份有限公司 超音波系统及其通讯方法
US9361630B1 (en) 2010-04-01 2016-06-07 Subrata Goswami Provision of location based services
US8509882B2 (en) 2010-06-08 2013-08-13 Alivecor, Inc. Heart monitoring system usable with a smartphone or computer
US9351654B2 (en) 2010-06-08 2016-05-31 Alivecor, Inc. Two electrode apparatus and methods for twelve lead ECG
CA2868464A1 (fr) * 2012-03-29 2013-10-03 Rensselaer Polytechnic Institute Systeme de fourniture de puissance et de communication par ultrasons a duplex integral a travers la paroi, avec poursuite de la frequence
US10508937B2 (en) * 2012-04-12 2019-12-17 Texas Instruments Incorporated Ultrasonic flow meter
WO2014036436A1 (fr) 2012-08-30 2014-03-06 Alivecor, Inc. Système de surveillance de la santé cardiaque à utiliser avec des dispositifs de communication mobile
US9254095B2 (en) 2012-11-08 2016-02-09 Alivecor Electrocardiogram signal detection
WO2014107700A1 (fr) 2013-01-07 2014-07-10 Alivecor, Inc. Procédés et systèmes de placement d'électrode
US9254092B2 (en) 2013-03-15 2016-02-09 Alivecor, Inc. Systems and methods for processing and analyzing medical data
US9247911B2 (en) 2013-07-10 2016-02-02 Alivecor, Inc. Devices and methods for real-time denoising of electrocardiograms
JP2015046680A (ja) * 2013-08-27 2015-03-12 日本電気株式会社 送信装置、受信装置、送信方法及び受信方法
WO2015048815A1 (fr) 2013-09-30 2015-04-02 The Research Foundation For The State University Of New York Schémas de commande d'accès au support pour la communication par ultrasons dans le corps sur la base de statistiques de second ordre
US10898076B2 (en) 2013-09-30 2021-01-26 The Research Foundation For The State University Of New York Transmission and medium access control techniques for ultrasonic communications in the body
EP3079571A4 (fr) 2013-12-12 2017-08-02 Alivecor, Inc. Procédés et systèmes de suivi et de notation de l'arythmie
FR3030943B1 (fr) * 2014-12-17 2017-07-21 St Microelectronics Tours Sas Dispositif acoustique d'isolation galvanique
JP6486680B2 (ja) * 2014-12-26 2019-03-20 Kddi株式会社 受信端末並びに方法及びプログラム
CN107847154B (zh) 2015-05-13 2021-07-16 阿利弗克公司 不一致监测
US10177858B2 (en) * 2015-10-02 2019-01-08 Texas Instruments Incorporated Minimum tone separation constrained MFSK scheme for ultrasonic communications
WO2025149636A1 (fr) 2024-01-10 2025-07-17 Baumann Samira Transducteur ultrasonore et procédé de génération de signaux ultrasonores pour une communication numérique par l'intermédiaire d'une émission ultrasonore

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982852A (en) * 1956-11-21 1961-05-02 Research Corp Anti-multipath communication system
US3069657A (en) * 1958-06-11 1962-12-18 Sylvania Electric Prod Selective calling system
US3075400A (en) * 1959-06-15 1963-01-29 Admiral Corp Control system
US3330909A (en) * 1964-01-02 1967-07-11 Bell Telephone Labor Inc Pulse communication system
US3289152A (en) * 1964-02-06 1966-11-29 Gen Dynamics Corp Acoustic signaling system
US3336571A (en) * 1965-05-19 1967-08-15 Gen Dynamics Corp Underwater acoustic signaling system
US3469189A (en) * 1966-04-01 1969-09-23 Gulf General Atomic Inc Method and system for communication of information utilizing pulse compression principles
US3742440A (en) * 1971-11-01 1973-06-26 Raytheon Co System for activating a remote underwater device

Also Published As

Publication number Publication date
JPS4951801A (fr) 1974-05-20
US4045767A (en) 1977-08-30
GB1447547A (en) 1976-08-25
DE2347146B2 (de) 1978-04-13
DE2347146A1 (de) 1974-04-04
DE2347146C3 (de) 1978-11-30

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Legal Events

Date Code Title Description
ST Notification of lapse