JPH0452582A - Vertical line-array buoy with three-dimensional position measuring function - Google Patents

Abstract

PURPOSE:To enable three-dimensional positions of hydrophones under sea to be detected by providing three transmitters which are at equal angles and in parallel for a suspension cable for transmitting signal and by allowing the hydrophones to receive the signal. CONSTITUTION:Three rear arms 8 which are thrown into sea are expanded in horizontal direction and at mutually equal angles. After expansion, a signal processing part 5 transmits signal from three transmitters 9 at a certain interval. Then, hydrophones 4 receive this signal and send it to the processing part 5 by a suspension cable 2. Then, the processing part 5 detects arrival times of reception signal, detects signal arrival times after obtaining transmission time information of the arm 8, and obtains arm identification information from the transmitter 9. Also, it identifies position of each arm based on orientation information from a compass 7 and sends it to a transmission part 6 along with signal arrival time and arm identification information as transmission signal. Then, the transmission part 6 transmits this transmission signal by electric wave. Processing device sides such as ship and aircraft which received this electric wave can detects three-dimensional positions of the hydrophones 4 from these pieces of information.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vertical line array buoy with a three-dimensional position measurement function, and particularly to a vertical line array buoy with a three-dimensional position measurement function. This invention relates to a vertical line array buoy with a three-dimensional position measurement function that transmits data to a processing device located in a region.

[Conventional technology]

A suspension cable that is suspended from a floating part floating on the sea suspends a suspended part that includes a vertical line array in which multiple hydrophones are lined up. Vertical line array buoys for detecting targets are well known.

Conventional vertical line array buoys do not have the function of detecting the position of high troughs suspended in the sea, and it is assumed that each of the two high troughs is arranged in a straight line in the direction perpendicular to the sea surface. It was in operation.

[Problem to be solved by the invention]

The conventional vertical line array buoy mentioned above is operated with high troughs suspended in the sea and arranged in a straight line perpendicular to the sea surface, so the position of the high troughs changes due to the influence of tidal currents, etc. If acoustic signals are acquired from under the sea under such conditions, the expected directivity gain and azimuth accuracy cannot be obtained, which inevitably reduces operational effectiveness.

[Means to solve the problem]

The vertical line array buoy of the present invention includes a floating part floating on the sea, and a hanging part having a vertical line array in which a plurality of hydrophones are vertically and linearly suspended from the floating part by a hanging cable. In the vertical line array buoy, the hanging cables near the upper end of the vertical line array have a structure in which they are extended horizontally at equal angles to each other during operation and can be folded along the hanging cables when stored. arms, and three transmitters disposed at the tips of the three arms and sequentially transmitting transmission signals containing identification codes of the respective arms at regular time intervals according to commands transmitted from the floating section.

A suspension part comprising a horizontally disposed compass that also serves as a connection part of the three arms to the suspension cable; a signal processing unit that receives signals received from the hydrophone and azimuth information from the compass, processes them into transmission signals in a predetermined format, and outputs them, and controls on/off of the operation of the three transmitters; The floating unit includes a transmitting unit that sends output information of the signal processing unit and a floating unit.

Further, the vertical line array buoy of the present invention has a configuration in which the floating section is floated on the sea by a float, and the output of the transmitting section is sent out by an antenna disposed on the float.

〔Example〕

Next, one embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view showing the overall structure of an embodiment of the present invention, and FIG. 2 is a block diagram showing the electrical structure of the embodiment of FIG.

As shown in FIG. 1, the vertical line array buoy with three-dimensional position measurement function of this embodiment is roughly divided into a floating part 10 and a hanging part 2.
Consists of 0.

The floating section 10 includes a floating section main body 1, a suspension cable 2 that suspends the floating section main body 1, a float 11 that has buoyancy and floats on the sea, and an antenna 12 disposed on the float 11.
It consists of:

Moreover, the hanging part 20 includes a hanging cable 2, an arm part 3,
In addition to the plurality of high trough ons 4, in this embodiment there are two hanging parts 2.
A stabilizer plate 30 is provided for the purpose of increasing the stability of zero.

The arm portion 3 of the hanging portion 20 has three arms 8 that extend horizontally at equal angles to each other in the operating state.

Three transmitters 9 arranged at the tips of three arms 8,
It comprises a compass 7 which also serves as a mounting part for a book arm 8. The three arms 8 have a structure in which they are folded downward along the suspension cable 2 using the attachment part of the compass 7 as a fulcrum when stored, and are expanded after being thrown into the sea.

Furthermore, the suspension cable 2 has a tensile strength capable of withstanding the static load caused by the suspension section 20 and the dynamic load during operation, and has core wires for signals and power.

Moreover, the floating part main body 1 is as shown in FIG.

It consists of a transmitter 6 and a signal processor 5 that outputs a transmission signal to the transmitter 6.

Next, the operation of this embodiment will be explained with reference to FIG.

The three arms 8 of the arm section 3 are put into the sea and then expanded. After the arm 8 is extended, signals are sequentially transmitted at regular intervals from the three transmitters 9 disposed at the tip under the control of the signal processing section 5. This transmitted signal is received by the hydrophone and supplied to the signal processing unit 5 via the hanging cable 2. The signal processing unit 5 detects the arrival time of the received signal thus provided, obtains transmission time information at which the signal at the tip of the arm 8 was transmitted, and detects the signal arrival time, and also receives arm identification information from the transmitter 9. obtain. The position of each arm is also identified based on the azimuth information from the compass 7 of the arm section 3, and is supplied to the transmitting section 6 as a transmission signal in the transmission format to be sent from the transmitting section along with the signal arrival time and arm identification information described above. .

The transmitter 6 transmits this transmission signal using a radio wave of a predetermined frequency in the VHF band as a carrier wave. On the processing device side of a ship, aircraft, etc. that receives the radio waves from the transmitter 6, the distance between each arm tip and the high trough on can be detected based on the signal arrival time, so the three-dimensional position of the high trough on can be detected from this information.

〔Effect of the invention〕

As explained above, the present invention enables the three-dimensional position of the high trough of a vertical line array buoy in the sea to be determined by transmitting signals from three transmitters arranged horizontally at equal angles and installed close to the hydrophone on a hanging cable. This has the effect of enabling vertical line array buoys to be detected and efficiently operated.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the overall structure of an embodiment of the present invention, and FIG. 2 is a block diagram showing the structure of the embodiment of FIG. 1...Floating part main body, 2...Suspension cable, 3...
Arm section, 4... High trough on, 5... Signal processing section, 6... Transmission section, 7... Compass, 8... Arm, 9... Transmitter, 10... Floating section, 11... Float, 12... Antenna, 20... Hanging part, 30
... Stabilizer.

Claims (1)

[Claims] 1. Comprised of a floating part floating on the sea, and a hanging part having a vertical line array in which a plurality of hydrophones are suspended linearly in the vertical direction from the floating part by means of hanging cables. In the vertical line array buoy, three cables are attached to the suspension cable near the upper end of the vertical line array and have a structure that can be extended horizontally at equal angles to each other during operation and can be folded along the suspension cable when stored. an arm, three transmitters disposed at the tips of the three arms and sequentially transmitting transmission signals containing identification codes of the respective arms at regular time intervals according to commands transmitted from the floating section;
A hanging part is provided with a horizontally disposed compass that also serves as a connecting part to the hanging cables of the three arms, and the receiving part of the three transmitters in addition to the received signals by the plurality of hydrophones. a signal processing unit that receives signals received from the plurality of hydrophones and azimuth information from the compass, processes the signals into transmission signals in a predetermined format, outputs the signals, and controls on/off of the operation of the three transmitters; A vertical line array buoy with a three-dimensional position measurement function, characterized in that it comprises a floating section having a transmitting section that transmits output information of the signal processing section. 2. Claim 1, wherein the floating section is suspended on the sea by a float, and the output of the transmitting section is transmitted by an antenna disposed on the float.
Vertical line array buoy with stereo position measurement function as described.