FR2627034A1 - Apparatus for underwater communication using light waves - Google Patents

Apparatus for underwater communication using light waves Download PDF

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Publication number
FR2627034A1
FR2627034A1 FR8801425A FR8801425A FR2627034A1 FR 2627034 A1 FR2627034 A1 FR 2627034A1 FR 8801425 A FR8801425 A FR 8801425A FR 8801425 A FR8801425 A FR 8801425A FR 2627034 A1 FR2627034 A1 FR 2627034A1
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France
Prior art keywords
generator
transmitter
lamp
receiver
underwater communication
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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.)
Pending
Application number
FR8801425A
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French (fr)
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Individual
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Individual
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.)
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR8801425A priority Critical patent/FR2627034A1/en
Publication of FR2627034A1 publication Critical patent/FR2627034A1/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
    • H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy

Abstract

The invention relates to an apparatus allowing underwater communication by employing light waves. It includes a transmitter consisting of a microphone 1 which, under the action of a sound, modulates the current from a generator 2 and which passes through an electric lamp 3. This modulation is thus transported by the light of the latter up to the receiver which comprises a photocell 4, a generator 5 and a sound restoring earpiece 6. The apparatus is particularly intended for communication between autonomous divers.

Description

DESCRIP TION
L'invention proposée ici permet la communicaton sousmarine par l'emploi d'ondes lumineuses, d'où le nom de "photo- phone" qui lui a été donné.DESCRIP TION
The invention proposed here allows underwater communication by the use of light waves, hence the name "photophone" which has been given to it.

La com"lunication sous-marine est rendue difficile par le fait que les ondes hertziennes n'ont pas la propriété de se propager sous 11 eau. Ceci limite considérablement les travaux sous-marins (par ex. recherche de trésors) et augmente les risques d'accidents , surtaout quand il s'agit-de plongeurs autonomes travaillant ensemble. Underwater communication is made difficult by the fact that radio waves do not have the property of propagating under water. This considerably limits underwater work (eg search for treasures) and increases the risks accidents, especially when it comes to scuba divers working together.

Pour résoudre ce problème, on fait habituellement recours soit à l'emploi d'ondes ultrasonores, ce qui nécessite de coûteux moyens d'émission et de réception ; soit à l'utilisation, dans le cas de plongeurs autonomes, de signaux manuels conventionnels peu maniables et ne pouvant transmettre que très peu d'informations. To resolve this problem, use is usually made of either the use of ultrasonic waves, which requires costly transmission and reception means; or the use, in the case of scuba divers, of conventional manual signals which are difficult to handle and which can transmit very little information.

Le photophone permet de résoudre tous ces problèmes; Il comporte en effet un microphone dont le courant modulé soyas l'action d'un son passe dans une lampe électrique qui produit une lumière dont l'intensité suit exactement les variations du courant du microphone. L'ensemble générateur de courant-microphone-lampe électrique constitue l'émetteur. Une photopile placée dans le faisceau lumineux modulé de la lampe produit par effet photovoltaique un courant ayant les mêmes variations que celui que module le microphone. Enfin, un écouteur alimenté par ce courant restitue le son émis devant le microphone. The photophone solves all these problems; It indeed includes a microphone whose modulated current or action of sound passes through an electric lamp which produces a light whose intensity follows exactly the variations of the current of the microphone. The current generator-microphone-electric lamp assembly constitutes the transmitter. A photocell placed in the modulated light beam of the lamp produces by photovoltaic effect a current having the same variations as that which the microphone modulates. Finally, an earpiece powered by this current reproduces the sound emitted in front of the microphone.

Afin d'augmenter la distance maximum entre l'émetteur et le récepteur, un amplificateur à semi-conducteur est annexé au circuit de réception. Dans ce même but, la lumière qui servira à la transmission du son doit entre de courte longueur d'onde (lumière bleue ou violette) car sous l'eau les radiations de grandes longueurs d'onde ne vont pas très loin. In order to increase the maximum distance between the transmitter and the receiver, a semiconductor amplifier is attached to the reception circuit. For the same purpose, the light that will be used for the transmission of sound must enter between short wavelengths (blue or purple light) because underwater the radiations of long wavelengths do not go very far.

Pour permettre à l'appareil d'émettre et de recevoir en même temps, chaque émetteur est pourvu d'un récepteur. To allow the device to transmit and receive at the same time, each transmitter is provided with a receiver.

Les dessins annexés illustrent schématiquement l'invention
La figure 1 représente l'invention proprement dite.The accompanying drawings schematically illustrate the invention
Figure 1 shows the invention itself.

La figure 2 ajoute au schéma précédent un amplificateur
La figure 5 montre comment l'appareil soit être porté par un plongeur autonor.e. Figure 2 adds an amplifier to the previous diagram
Figure 5 shows how the device should be carried by a self-contained diver.

Le dispositif représenté à la figure 1 comporte un microphone (1) relié à un générateur de courant (2) dot la puissance dépend du domaine d'utilisation et à une latipe élec- trique (à incandescence ou à fluorescence) (3). Dans le faisceau de la lumière de cette lampe se trouve une photopile -(4) reliée à un générateur (5) et à un écouteur (6!. Sur la figure 3, en vue d'élargir le champ de réception de l'apFareil, le plongeur porte un casque recouvert par la photopile (4). En outre, l'a plifica- teur et le générateur sont enfermés dans un petit sac que porte en avant le plongeur coite un sac de parachute et sur lequel est placée la lampe électrique (3). The device represented in FIG. 1 comprises a microphone (1) connected to a current generator (2) dot the power depends on the field of use and to an electric latipe (incandescent or fluorescence) (3). In the beam of light of this lamp is a photocell - (4) connected to a generator (5) and to an earphone (6 !. In Figure 3, in order to widen the field of reception of the device , the diver wears a helmet covered by the solar cell (4) .Also, the plifier and the generator are enclosed in a small bag which the forward wears the diver has a parachute bag and on which the lamp is placed electric (3).

Le photophone est particulièrement destiné à la communication entre plongeurs autonomes.  The photophone is particularly intended for communication between scuba divers.

Claims (6)

REVENDICATIONCLAIM 1) Appareil de communication sous-marine caractérisé en ce qu'il utilise comme émetteur un microphone (1) relié à un générateur (2) et à une lampe électrique (5), contre agent de transmission la lumière émise par la lampe (3) et comme récepteur une photopile (4) relié à un générateur (5) et à un écouteur (6). 1) Underwater communication device characterized in that it uses as a transmitter a microphone (1) connected to a generator (2) and to an electric lamp (5), against the agent transmitting the light emitted by the lamp (3 ) and as a receiver a solar cell (4) connected to a generator (5) and to an earphone (6). 2) Appareil selon la revendication 1 caractérisé en ce qu'un amplificateur à semi-conducteur (7) est incorporé dans le circuit du récepteur. 2) Apparatus according to claim 1 characterized in that a semiconductor amplifier (7) is incorporated in the receiver circuit. 3) Appareil selon la revengication 1 ou la revendication 2, caractérisé en ce que la lumière émise par la lampe (3) est bleue ou violette. 3) Apparatus according to revengication 1 or claim 2, characterized in that the light emitted by the lamp (3) is blue or purple. 4) Appareil selon l'une quelconque des revendications précédentes caractérisé en ce que l'émetteur est pourvu d'un récepteur dont le circuit, placé en dérivation avec celui de l'émetteur, utilise le meme générateur (2). 4) Apparatus according to any one of the preceding claims characterized in that the transmitter is provided with a receiver whose circuit, placed in bypass with that of the transmitter, uses the same generator (2). 5) appareil selon la revendication 4 caractérisé, dans le cas d'un plongeur autonome, en ce que la photopile (4) recouvre la surface extérieure d'un casque porté par le'plongeur. 5) device according to claim 4 characterized, in the case of an autonomous plunger, in that the solar cell (4) covers the outer surface of a helmet worn by le'plongeur. 6) Appareil selon la revendication 4 caractérisé en ce que le générateur et l'amplificateur sont enfermés dans un petit sac que porte en avant le plongeur comme un sac de parachute et sur lequel est placée la lampe électrique (3)..  6) Apparatus according to claim 4 characterized in that the generator and the amplifier are enclosed in a small bag that carries forward the diver like a parachute bag and on which is placed the electric lamp (3) ..
FR8801425A 1988-02-04 1988-02-04 Apparatus for underwater communication using light waves Pending FR2627034A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8801425A FR2627034A1 (en) 1988-02-04 1988-02-04 Apparatus for underwater communication using light waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8801425A FR2627034A1 (en) 1988-02-04 1988-02-04 Apparatus for underwater communication using light waves

Publications (1)

Publication Number Publication Date
FR2627034A1 true FR2627034A1 (en) 1989-08-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8801425A Pending FR2627034A1 (en) 1988-02-04 1988-02-04 Apparatus for underwater communication using light waves

Country Status (1)

Country Link
FR (1) FR2627034A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2279836A (en) * 1993-06-18 1995-01-11 Allseas Eng Bv Underwater communications

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR671711A (en) * 1929-03-19 1929-12-18 Anciens Ets Barbier Method and devices for telephony by light beam, visible or invisible
FR2584254A1 (en) * 1985-06-28 1987-01-02 Braun Bernard Transceiver device for short-distance voice communication
WO1987003154A1 (en) * 1985-11-14 1987-05-21 Shlomo Gonen Optical underwater communicator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR671711A (en) * 1929-03-19 1929-12-18 Anciens Ets Barbier Method and devices for telephony by light beam, visible or invisible
FR2584254A1 (en) * 1985-06-28 1987-01-02 Braun Bernard Transceiver device for short-distance voice communication
WO1987003154A1 (en) * 1985-11-14 1987-05-21 Shlomo Gonen Optical underwater communicator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2279836A (en) * 1993-06-18 1995-01-11 Allseas Eng Bv Underwater communications
NL9400986A (en) * 1993-06-18 1995-01-16 Allseas Eng Bv Method and device for communication under water.
GB2279836B (en) * 1993-06-18 1997-12-10 Allseas Eng Bv Method of and system for communication under water

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