WO2017212640A1 - Dispositif d'antenne - Google Patents

Dispositif d'antenne Download PDF

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Publication number
WO2017212640A1
WO2017212640A1 PCT/JP2016/067376 JP2016067376W WO2017212640A1 WO 2017212640 A1 WO2017212640 A1 WO 2017212640A1 JP 2016067376 W JP2016067376 W JP 2016067376W WO 2017212640 A1 WO2017212640 A1 WO 2017212640A1
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WO
WIPO (PCT)
Prior art keywords
liquid
antenna
fresh water
communication
antenna device
Prior art date
Application number
PCT/JP2016/067376
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English (en)
Japanese (ja)
Inventor
西岡　泰弘
田中　泰
良夫 稲沢
宮下　裕章
哲治 原田
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/067376 priority Critical patent/WO2017212640A1/fr
Publication of WO2017212640A1 publication Critical patent/WO2017212640A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/04—Adaptation for subterranean or subaqueous use

Definitions

  • the present invention relates to an antenna device that performs wireless communication in a liquid.
  • One of the problems to be overcome is data transmission technology. For example, when transmitting video data taken on the sea floor to the exploration project headquarters installed on land, at present, the exploration boats that are taking video on the sea floor rise to the sea or near the sea surface, and the video The data is transferred to the surface boat and the surface boat carries the video data to the land.
  • an optical communication system using light As an underwater wireless communication system, an optical communication system using light, a communication system using sound waves or ultrasonic waves, a communication system using radio waves, and the like are conceivable.
  • the communication method using light is used to realize relatively large-capacity data communication over a distance of several tens of meters under the condition that a wavelength with low attenuation is selected and the underwater communication path is not cloudy. be able to.
  • this method cannot be used to realize large-capacity data communication even when the distance is about several tens of meters when the underwater communication path is cloudy, and the usable locations are limited. Is done.
  • a communication method using a sound wave or an ultrasonic wave can be used to realize a long-distance communication on the order of km, but a communication capacity of about several tens of kbps is the limit, and video data and the like are transmitted at high speed. Is unsuitable.
  • the communication method using radio waves has a very large attenuation of radio waves in the sea, so it cannot be used to achieve high-capacity communication performance even if the radio wave communication method used in the air is applied as it is. Have difficulty.
  • Non-Patent Document 1 when a radio wave communication method performed in the air is applied to radio communication in the sea, the data transmission rate is 20 Mbps under the condition that the distance between transmission and reception is 15 cm. It has been shown.
  • a wireless communication method when an optical communication method using light is used, a usable place is limited. Further, as a wireless communication method, when a communication method using sound waves or ultrasonic waves or a communication method using radio waves is used, it is difficult to transmit video data or the like at high speed. For this reason, there existed a subject that it was difficult to implement radio
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an antenna device capable of realizing wireless communication in a liquid such as underwater.
  • An antenna device includes an antenna installed in a first liquid, a communication device connected to the antenna, and wireless communication performed by the communication device. And a liquid discharge section that discharges a second liquid having a dielectric loss tangent smaller than that of the first liquid when received.
  • the second liquid having a dielectric loss tangent smaller than that of the first liquid when the liquid emitting unit performs wireless communication by the communication device and radiates radio waves from the antenna or receives radio waves by the antenna. Therefore, wireless communication can be realized in a liquid such as underwater.
  • FIG. It is a block diagram which shows the antenna apparatus by Embodiment 1 of this invention. It is explanatory drawing which shows the frequency characteristic of the dielectric loss tangent (tan-delta) of fresh water and seawater computed from the data currently disclosed by the nonpatent literature 2.
  • FIG. It is a block diagram which shows the other antenna apparatus by Embodiment 1 of this invention. It is a block diagram which shows the antenna apparatus by Embodiment 2 of this invention. It is a block diagram which shows the other antenna apparatus by Embodiment 2 of this invention. It is a block diagram which shows the antenna apparatus by Embodiment 3 of this invention. It is a block diagram which shows the antenna apparatus by Embodiment 4 of this invention. It is a block diagram which shows the antenna apparatus by Embodiment 5 of this invention.
  • FIG. 1 is a block diagram showing an antenna apparatus according to Embodiment 1 of the present invention.
  • the housing 1 may be, for example, a housing for an exploration boat that dives to the seabed, and the housing 1 houses a transceiver 4, a tank 5, a power source 6, and the like.
  • the casing 1 is provided with a drain port 1a for draining fresh water (second liquid).
  • second liquid fresh water
  • the area outside the drain port 1a in the housing 1 is filled with seawater (first liquid), but the fresh water is discharged from the tank 5, Region 3 is filled with fresh water.
  • a region outside the drain port 1a in the housing 1 is a region above the drain port 1a in the drawing.
  • the antenna 2 is installed in an area 3 filled with fresh water by discharging fresh water from the tank 5.
  • the transceiver 4 is a communication device that transmits and receives radio waves.
  • FIG. 1 shows an example in which the antenna device is mounted with the transceiver 4, but a transmitter that only transmits radio waves or a receiver that only receives radio waves is mounted as a communication device. There may be.
  • the tank 5 stores fresh water, and when the wireless communication is performed by the transmitter / receiver 4 and the radio wave is radiated from the antenna 2 or received by the antenna 2, the liquid that emits the fresh water having a smaller dielectric loss tangent than seawater. It is a discharge part.
  • the power source 6 is a battery that supplies driving power to the transceiver 4 and the tank 5.
  • the tank 5 emits fresh water having a dielectric loss tangent smaller than seawater when radio communication is performed by the transceiver 4 and radio waves are radiated from the antenna 2 or received by the antenna 2. Since fresh water is lighter than seawater, the fresh water released from the tank 5 rises toward the sea surface.
  • the specific gravity of seawater is 1.025.
  • FIG. 2 is an explanatory diagram showing the frequency characteristics of the dielectric loss tangent (tan ⁇ ) of fresh water and sea water calculated from the data disclosed in Non-Patent Document 2 below.
  • Non-Patent Document 2 Rec. ITU-R P.527-3, “Electrical characteristics of the surface of the Earth,” ITU, Geneva, 1992.
  • the dielectric loss tangent is an index representing the attenuation of radio waves in the dielectric. The higher the dielectric loss tangent, the greater the attenuation of radio waves. At a frequency of about 10 GHz or less, as shown in FIG.
  • a dielectric loss tangent of 0.01 is equivalent to the dielectric loss tangent of, for example, a circuit board provided in an electric / electronic device or a glass epoxy substrate often used for an antenna, so that radio waves can be transmitted with low loss. It is a sufficient value.
  • the transceiver 4 starts radio communication when fresh water is discharged from the tank 5 and the area 3 is filled with fresh water, and the fresh water discharged from the tank 5 reaches the sea surface.
  • radio waves are radiated from the antenna 2.
  • the radio wave is reflected almost without passing through the boundary between fresh water and seawater, so the radio wave radiated from the antenna 2 hardly leaks to the seawater side. Propagates the inside with low loss. This makes it possible to dramatically increase the data transmission capacity, transmission distance, transmission efficiency, and the like as compared with the case where the radio wave communication method performed in the air is directly applied to the underwater communication method.
  • the antenna 2 in order to maximize the transmission efficiency of radio waves, is installed in an area 3 filled with fresh water when fresh water is discharged from the drain 1a of the housing 1. Is shown.
  • the antenna 2 is desirably installed in the area 3 filled with fresh water, but may be installed in the vicinity of the area 3 filled with fresh water as shown in FIG.
  • FIG. 3 is a block diagram showing another antenna apparatus according to Embodiment 1 of the present invention. As described above, the reflection of radio waves is large at the boundary between fresh water and sea water. This is true for the propagation wave after the radio wave is radiated from the antenna 2, and the radio wave is radiated from the antenna 2.
  • the radio wave flows into the fresh water relatively efficiently. For this reason, even when the antenna 2 is installed in a region near the region 3 filled with fresh water, the radio wave radiated from the antenna 2 can be propagated with low loss.
  • the tank 5 when the tank 5 performs radio communication by the transceiver 4 and the radio wave is radiated from the antenna 2 or received by the antenna 2, the seawater Since fresh water having a smaller dielectric loss tangent is discharged, wireless communication can be realized in a liquid such as the sea.
  • the first liquid is seawater and the second liquid is fresh water.
  • the first liquid is seawater and the second liquid is fresh water. It is not limited to an example.
  • the dielectric loss tangent of methyl alcohol is about 1, and the radio wave propagating in methyl alcohol is greatly attenuated. Therefore, by releasing fresh water or oil from the tank 5, even when the first liquid is methyl alcohol, the same wireless communication can be realized.
  • Non-Patent Document 3 The Institute of Electronics, Information and Communication Engineers, Antenna Engineering Handbook (2nd edition), Ohmsha, Tokyo, 2008, p.998.
  • Embodiment 2 when the wireless communication is performed by the transmitter / receiver 4 and the radio wave is radiated from the antenna 2 or the radio wave is received by the antenna 2, the tank 5 that releases fresh water having a dielectric loss tangent smaller than seawater is provided.
  • the second embodiment an example in which a data recording unit 7 for recording data is further described will be described.
  • the data recording unit 7 is realized by a storage device such as a hard disk, and is a device that records data demodulated by the transmitter / receiver 4 or video data taken by the exploration boat. Driving power in the data recording unit 7 is supplied from a power source 6.
  • the present embodiment is the same as the first embodiment except that the data recording unit 7 is provided.
  • the data recording unit 7 records data demodulated by the transmitter / receiver 4 and data of video captured by the exploration boat, so that it is possible to analyze a change in the state of the seabed, for example.
  • the water pressure gauge 8 which measures the water pressure of seawater is further provided, and the measured value of the water pressure gauge 8 is shown. It may be recorded in the data recording unit 7.
  • the communication cable 9 connected to an external device is connected to the data recording unit 7 or the transmitter / receiver 4, and the data recorded in the data recording unit 7 or demodulated by the transmitter / receiver 4. Real-time data may be transmitted to an external device.
  • the data recorded in the data recording unit 7 includes the measurement value of the water pressure gauge 8.
  • the external device for example, a server device installed on land or at sea is conceivable, and as the communication cable 9, for example, an optical fiber cable or the like is conceivable. Thereby, for example, large-capacity data of still images and moving images can be transmitted to the external device at high speed regularly or in real time.
  • Embodiment 3 In the first and second embodiments, the antenna device including the tank 5 is illustrated as the liquid discharge unit. However, in the third embodiment, the antenna including the seawater desalination apparatus 10 as the liquid discharge unit. The apparatus will be described.
  • FIG. 6 is a block diagram showing an antenna apparatus according to Embodiment 3 of the present invention.
  • the housing 1 includes a water inlet 1b that takes in seawater as a first liquid.
  • the seawater desalination apparatus 10 is a liquid discharge unit that takes in seawater, converts the seawater into fresh water, and discharges the converted fresh water into the region 3 from the drain 1 a of the housing 1. Power for driving in the seawater desalination apparatus 10 is supplied from a power source 6.
  • a seawater desalination device 10 may be provided.
  • Embodiment 4 FIG. In the first to third embodiments, an example in which the power source 6 supplies driving power has been described. In the fourth embodiment, driving in the transceiver 4, the data recording unit 7, and the seawater desalination apparatus 10 is performed. A description will be given of power supplied from outside.
  • FIG. 7 is a block diagram showing an antenna apparatus according to Embodiment 4 of the present invention.
  • the power cable 11 is connected to the transmitter / receiver 4, the data recording unit 7, and the seawater desalination device 10.
  • the power cable 11 is driven from a land or sea power transmission facility to the transceiver 4, the data recording unit 7, and the seawater desalination device 10. It is a cable for supplying electric power.
  • the power source 6 is composed of a battery or the like, and since the amount of charge of the power source 6 is limited, it must be charged periodically.
  • the power cable 11 is connected to the transceiver 4, the data recording unit 7, and the seawater desalination apparatus 10, and the transceiver 4, the data recording unit 7, and the seawater freshwater are transmitted from land or sea power transmission facilities. Since electric power is supplied to the converter 10, efficient operation can be achieved. Since the method of supplying power using the power cable 11 is realized by a submarine optical fiber network repeater or the like, basically, a technique for supplying power to the repeater or the like may be utilized. In addition, when the existing power transmission repeater is on the seabed, the power cable 11 may be connected to the power transmission repeater.
  • the example in which the power cable 11 is applied to the antenna device of FIG. 6 is shown in FIG. 7, but the power to the antenna device of FIG. 1, FIG. 3, FIG. 4 or FIG.
  • the cable 11 may be applied.
  • Embodiment 5 FIG.
  • an example in which fresh water is discharged from the tank 5 or the seawater desalination apparatus 10 to the region 3 has been described.
  • the fresh water is discharged from the tank 5 or the seawater desalination apparatus 10.
  • An antenna device including a pump 12 that sucks fresh water and discharges the fresh water to the region 3 will be described.
  • FIG. 8 is a block diagram showing an antenna apparatus according to Embodiment 5 of the present invention.
  • the pump 12 is supplied with driving power from, for example, the power cable 11, sucks fresh water released from the seawater desalination apparatus 10, and discharges the fresh water to the region 3.
  • FIG. 8 shows an example in which the pump 12 sucks the fresh water discharged from the seawater desalination apparatus 10, but the tank 5 may be mounted instead of the seawater desalination apparatus 10, and the tank 5 is mounted. If so, the pump 12 sucks the fresh water released from the tank 5 and discharges the fresh water to the region 3.
  • the communication partner of the transmitter / receiver 4 is not a surface boat that exists on the sea surface but another search boat that exists below the housing 1, for example, another search target of the communication partner A radio wave propagation path composed of fresh water cannot be formed with the boat.
  • the communication partner of the transceiver 4 is, for example, Even if another exploration boat exists under the casing 1, a radio wave propagation path composed of fresh water can be formed with another exploration boat. Therefore, for example, wireless communication with another exploration boat existing below the housing 1 can also be realized.
  • the example in which the pump 12 is provided for the antenna device of FIG. 7 is shown in FIG. 8, but the antenna device of FIG. 1, FIG. 3, FIG. 4, FIG. A pump 12 may be provided.
  • the present invention is suitable for an antenna device that performs wireless communication in a liquid.

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Abstract

Un dispositif d'antenne comprend : une antenne (2) située dans l'eau de mer qui est un premier liquide ; un émetteur-récepteur (4) connecté à l'antenne (2) ; et un réservoir (5) permettant de libérer de l'eau douce qui est un second liquide ayant un facteur de dissipation diélectrique inférieur à celui de l'eau de mer lorsque l'émetteur-récepteur (4) met en œuvre une communication sans fil de telle sorte que des ondes radio sont irradiées à partir de l'antenne (2) ou reçues par l'antenne (2). Ceci permet d'obtenir une communication sans fil dans un liquide tel que sous la mer.
PCT/JP2016/067376 2016-06-10 2016-06-10 Dispositif d'antenne WO2017212640A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112635979A (zh) * 2021-03-10 2021-04-09 中国人民解放军海军工程大学 一种水下接收天线的双辐射体结构参数确认方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5794398A (en) * 1980-12-04 1982-06-11 Nippon Kayaku Co Ltd Scale preventing agent
JPH1019605A (ja) * 1996-07-08 1998-01-23 Tech Res & Dev Inst Of Japan Def Agency 船体検出装置用記録評価装置
US20110199227A1 (en) * 2010-02-12 2011-08-18 Mark Volanthen System for underwater communications comprising fluid modifying means
JP2011176672A (ja) * 2010-02-25 2011-09-08 Olympus Corp 通信変換装置、通信中継システム、および、通信装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5794398A (en) * 1980-12-04 1982-06-11 Nippon Kayaku Co Ltd Scale preventing agent
JPH1019605A (ja) * 1996-07-08 1998-01-23 Tech Res & Dev Inst Of Japan Def Agency 船体検出装置用記録評価装置
US20110199227A1 (en) * 2010-02-12 2011-08-18 Mark Volanthen System for underwater communications comprising fluid modifying means
JP2011176672A (ja) * 2010-02-25 2011-09-08 Olympus Corp 通信変換装置、通信中継システム、および、通信装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112635979A (zh) * 2021-03-10 2021-04-09 中国人民解放军海军工程大学 一种水下接收天线的双辐射体结构参数确认方法及装置
CN112635979B (zh) * 2021-03-10 2021-05-11 中国人民解放军海军工程大学 一种水下接收天线的双辐射体结构参数确认方法及装置

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